Automotive-grade intelligent power switching device

Abstract

The utility model provides a car -rule -level intelligent power switch device relates to the technical field of automobile electronic fittings, include: bottom plate, bottom plate main part is rectangular board shape structure, is established with a group of connecting holes respectively in the surface left and right sides of bottom plate, the upper end surface welding of bottom plate has two backing pad. In the utility model, temperature sensor is located inside the protective cover, directly gathers the ambient temperature of processing unit periphery, and will temperature analog signal change into digital signal transmission to the controller, when temperature is higher than the warning value, immediately sends the start signal to the fan inside the ventilation pipe, the fan starts operation, accelerates the flow of hot air current inside the protective cover, has solved the switch device although can set up the fan to radiate heat, but cannot according to switch device temperature to the intelligent regulation fan opening and closing, and processing unit directly sticks the surface of bottom plate, if bottom plate produces water drop or accumulates dust because of condensation, will directly contact with processing unit, thereby causes the circuit failure problem.

Description

Technical Field

[0001] This utility model relates to the field of automotive electronic components technology, and in particular to automotive-grade intelligent power switching devices. Background Technology

[0002] As the automotive industry undergoes a profound transformation towards electrification and intelligence, automotive-grade power switching devices, as core actuators in automotive high-voltage power distribution systems and low-voltage load circuits, directly determine the reliability and safety of the entire vehicle's electrical system through their operational stability, environmental adaptability, and ease of maintenance.

[0003] However, current automotive-grade power switching devices, due to the complex operating conditions and functional integration requirements of automobiles, are gradually revealing the following two technical shortcomings in practical applications: First, automotive-grade power switching devices generate a lot of heat during operation. Especially in high-frequency and high-power conditions such as fast charging and rapid acceleration of new energy vehicles, the core temperature of the device will rise rapidly. Although fans are set to dissipate heat from the switching devices, the fans are always on, which not only increases the power consumption of the whole vehicle, but also easily leads to wear and failure of the fan due to long-term operation, thus losing the heat dissipation guarantee and failing to intelligently adjust the fan opening and closing according to the temperature of the switching devices. Secondly, some components do not take into account the spacing between the processing unit and the base plate. The processing unit is directly attached to the surface of the base plate. If the base plate produces water droplets or accumulates dust due to condensation, it is easy to directly contact the processing unit, causing circuit failure and further reducing the reliability of the components. Utility Model Content

[0004] This utility model relates to automotive-grade intelligent power switching devices, which solves the problems of the fact that although the switching devices are equipped with fans for heat dissipation, the fans are always on, which not only increases the power consumption of the whole vehicle, but also easily leads to fan wear failure due to long-term operation. Furthermore, the fans cannot be intelligently adjusted according to the temperature of the switching devices. Additionally, the processing unit is directly attached to the surface of the base plate, and if water droplets or dust accumulate on the base plate due to condensation, they will directly contact the processing unit, thereby causing circuit failure.

[0005] This utility model provides an automotive-grade intelligent power switching device, specifically including: a base plate; The base plate is a rectangular plate structure. A set of connecting holes are opened on the left and right sides of the surface of the base plate, and two pads are welded to the upper end of the base plate. A rubber pad, located below the base plate, the main body of which is a rectangular plate structure; The processing unit is located above the base plate. A connecting plate is installed at each of the left and right ends of the processing unit. The surface of the connecting plate is evenly provided with through holes. The protective cover is fixedly installed above the base plate. A ventilation pipe is welded to the right end surface of the protective cover, and a fan is installed inside the ventilation pipe. An intelligent monitoring mechanism is fixedly installed on the outer end face of the protective cover. The connecting pipe has a thread at the front of its outer end, and a filter screen is installed inside the connecting pipe.

[0006] Furthermore, the intelligent monitoring mechanism includes: a controller, which is fixedly installed on the outer end face of the protective cover, a probe rod is fixedly installed at the front end of the controller, a temperature sensor is installed at the end of the probe rod, the temperature sensor is located inside the protective cover, and the controller is electrically connected to the fan.

[0007] Furthermore, a limiting block is fixedly installed on the upper end face of the rubber pad, and slots are evenly installed on the lower end face of the base plate, with the limiting block engaging in the slots on the lower end surface of the base plate.

[0008] Furthermore, a retaining ring is fixedly installed on the outer end face of the connecting pipe, and a thread is opened on the inner end face of the ventilation pipe, with the front end of the connecting pipe threadedly connected to the inside of the ventilation pipe.

[0009] Furthermore, the surface of the pad is uniformly provided with threaded holes, the surface of the connecting plate is uniformly provided with threaded holes, and the connecting plate and the pad are connected by bolts.

[0010] Furthermore, the front and rear side plates of the protective cover are evenly provided with heat dissipation holes, and the processing unit is located inside the protective cover.

[0011] This utility model provides an automotive-grade intelligent power switching device, which has the following advantages: 1. A slot is provided on the lower end face of the base plate, and limit blocks are evenly installed on the upper end face of the rubber pad. The limit blocks are engaged in the slot on the lower end face of the base plate. The elastic material of the rubber pad can absorb the vibration during the vehicle's operation, preventing the vibration from being transmitted to the processing unit above, which could cause the solder joints to fall off or the components to be damaged.

[0012] 2. A connecting plate is installed at each of the left and right ends of the processing unit. The surface of the connecting plate has threaded holes. A pad is fixedly installed at the upper end of the base plate. The connecting plate and the pad are connected by bolts. The pad can raise the distance between the processing unit and the base plate, preventing condensation and dust on the surface of the base plate from directly contacting the processing unit. At the same time, the threaded holes of the connecting plate and the pad can make the processing unit detachable and easy to maintain and replace later.

[0013] 3. A controller is installed on the outer end face of the protective cover. A probe is installed at the front end of the controller, and a temperature sensor is installed at the end of the probe. The temperature sensor is located inside the protective cover and directly collects the ambient temperature around the processing unit. It converts the temperature analog signal into a digital signal and transmits it to the controller. The controller presets the safe temperature threshold for automotive-grade power devices. When the temperature exceeds the warning value, the controller determines that the heat generated by the processing unit exceeds the natural heat dissipation capacity and immediately sends a start signal to the fan inside the ventilation duct. The fan starts running and accelerates the flow of hot air inside the protective cover. The hot air is discharged through the heat dissipation holes of the protective cover, while external cold air is drawn in by the fan to quickly reduce the temperature of the processing unit.

[0014] 4. The connecting pipe is connected to the internal thread of the ventilation pipe through the front thread. The filter screen inside the connecting pipe can filter the outside air drawn in by the fan, blocking dust, sand, lint and other impurities in the air from entering the protective cover. The retaining ring on the outer end face of the connecting pipe can limit the depth of the connecting pipe into the ventilation pipe, avoiding excessive screwing that may deform the filter screen or block the ventilation channel. When the filter screen becomes clogged after long-term use, it can be removed from the ventilation pipe by rotating the connecting pipe to directly replace or clean the filter screen. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0016] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the present invention.

[0017] In the attached diagram: Figure 1 A schematic diagram of the overall device structure of this utility model is shown; Figure 2 An exploded view of the overall device of this utility model is shown; Figure 3 A cross-sectional view of the ventilation pipe of this utility model is shown; Figure 4 An exploded view of the connecting pipe and ventilation pipe of this utility model is shown. Figure 5 A schematic diagram of the connection structure between the protective cover, ventilation pipe and controller of this utility model is shown; Figure 6 The diagram shows an exploded view of the processing unit, pad, and base plate of this invention.

[0018] List of reference numerals in the attached diagram: 1. Base plate; 101. Connecting hole; 102. Slot; 103. Pad; 2. Rubber pad; 201. Limiting block; 3. Processing unit; 301. Connecting plate; 4. Protective cover; 401. Heat dissipation hole; 5. Ventilation pipe; 501. Fan; 6. Connecting pipe; 601. Retaining ring; 602. Filter screen; 7. Controller; 701. Detector rod; 7011. Temperature sensor. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Example 1: Please refer to Figures 1 to 6 : This utility model proposes an automotive-grade intelligent power switching device, including: a base plate 1; The base plate 1 is a rectangular plate structure. A set of connecting holes 101 are opened on the left and right sides of the surface of the base plate 1. Two pads 103 are welded to the upper end of the base plate 1. Rubber pad 2 is located below the base plate 1. The main body of rubber pad 2 is a rectangular plate structure. Processing unit 3 is located above base plate 1. A connecting plate 301 is installed at each of the left and right ends of processing unit 3. The surface of the connecting plate 301 is evenly provided with through holes. Protective cover 4 is fixedly installed above the base plate 1. A ventilation pipe 5 is welded to the right end surface of the protective cover 4. A fan 501 is installed inside the ventilation pipe 5. An intelligent monitoring mechanism is fixedly installed on the outer end face of the protective cover 4. The connecting pipe 6 has a thread at the front of its outer end, and a filter screen 602 is installed inside the connecting pipe 6.

[0021] The intelligent monitoring mechanism includes a controller 7, which is fixedly installed on the outer end face of the protective cover 4. A probe rod 701 is fixedly installed at the front end of the controller 7, and a temperature sensor 7011 is installed at the end of the probe rod 701. The temperature sensor 7011 is located inside the protective cover 4. The controller 7 is electrically connected to the fan 501. During use, the probe rod 701 is installed at the front end of the controller 7, and the temperature sensor 7011 is installed at the end of the probe rod 701. The temperature sensor 7011 is located inside the protective cover 4 and directly collects the ambient temperature around the processing unit 3. It converts the temperature analog signal into a digital signal and transmits it to the controller 7. The controller 7 presets the safe temperature threshold of automotive-grade power devices. When the temperature sensor 7011 detects that the temperature inside the protective cover 4 is higher than the temperature threshold, it immediately sends a start signal to the fan 501 inside the ventilation duct 5. The fan 501 starts to run, accelerating the flow of hot air inside the protective cover 4. The hot air is discharged through the heat dissipation hole 401 of the protective cover 4, while the external cold air is drawn in by the fan 501, quickly reducing the temperature of the processing unit 3.

[0022] Among them, the upper end face of the rubber pad 2 is fixedly installed with a limiting block 201, and the lower end face of the base plate 1 is evenly installed with slots 102. The limiting block 201 is engaged in the slots 102 on the lower end face of the base plate 1. During use, the elastic material of the rubber pad 2 can absorb the vibration during the car's driving process, and prevent the vibration from being transmitted to the processing unit 3 above, which may cause the solder joints to fall off or the components to be damaged.

[0023] The connecting pipe 6 has a retaining ring 601 fixedly installed on its outer end face, and the ventilation pipe 5 has a thread on its inner end face. The front end of the connecting pipe 6 is threaded into the ventilation pipe 5. In use, the connecting pipe 6 is connected to the ventilation pipe 5 through the front thread. The filter screen 602 inside the connecting pipe 6 can filter the external air drawn in by the fan 501, blocking dust, sand, lint and other impurities in the air from entering the protective cover 4. The retaining ring 601 on the outer end face of the connecting pipe 6 can limit the depth of the connecting pipe 6 screwed into the ventilation pipe 5, avoiding excessive screwing that could deform the filter screen 602 or block the ventilation channel.

[0024] The surface of the pad 103 is uniformly provided with threaded holes, and the surface of the connecting plate 301 is uniformly provided with threaded holes. The connecting plate 301 and the pad 103 are connected by bolts. In use, the pad 103 can raise the distance between the processing unit 3 and the base plate 1, so as to prevent condensation and dust on the surface of the base plate 1 from directly contacting the processing unit 3. At the same time, the threaded holes of the connecting plate 301 and the pad 103 can be matched to realize the detachable installation of the processing unit 3, which is convenient for later maintenance and replacement.

[0025] The protective cover 4 has heat dissipation holes 401 evenly distributed on the front and rear side plates. The processing unit 3 is located inside the protective cover 4, which can promote air circulation inside and outside the protective cover 4.

[0026] In Example 2, based on the processing unit 3 in Example 1, the processing unit 3 integrates automotive-grade power switching elements, drive circuits, and overcurrent and overvoltage protection circuits. When the vehicle controller 7 sends a turn-on command to the processing unit 3, the drive circuit outputs a stable gate voltage, turning on the power switching elements to realize the transmission of high-voltage and low-voltage electrical energy to the vehicle load. When a turn-off command is received or a fault such as a load short circuit or overvoltage is detected, the drive circuit immediately cuts off the gate voltage, turns off the power switching elements, and disconnects the power distribution circuit to avoid damage to the load or the device itself.

[0027] The working principle of this embodiment: In this invention, the base plate 1 serves as the core mechanical support for the device. A slot 102 is provided on the lower end face of the base plate 1. Limiting blocks 201 are evenly installed on the upper end face of the rubber pad 2, engaging with the slot 102 on the lower end face of the base plate 1. The elastic material of the rubber pad 2 absorbs vibrations during vehicle operation, preventing vibrations from being transmitted to the processing unit 3 above, which could lead to solder joint detachment or component damage. Simultaneously, the cooperation between the limiting blocks 201 and the slot 102 prevents relative sliding between the base plate 1 and the rubber pad 2, ensuring the overall stability of the device installation. A set of connecting holes 101 are provided on both the left and right sides of the base plate 1, allowing screws to be used to fix the base plate 1 to the mounting bracket of the vehicle controller 7. The processing unit 3 integrates core electrical components such as power switches, drive circuits, and protection circuits to achieve mechanical positioning at the vehicle level. A connecting plate 301 is installed at each of the left and right ends of the processing unit 3. The surface of the connecting plate 301 has threaded holes. A pad 103 is fixedly installed on the upper end of the base plate 1. The connecting plate 301 and the pad 103 are connected by bolts. The pad 103 raises the distance between the processing unit 3 and the base plate 1, preventing condensation and dust on the surface of the base plate 1 from directly contacting the processing unit 3. Simultaneously, the threaded holes of the connecting plate 301 and the pad 103 allow for the detachable installation of the processing unit 3, facilitating future maintenance and replacement. A protective cover 4 is fixedly installed on the upper surface of the base plate 1. The protective cover 4 completely encloses the processing unit 3, preventing the intrusion of contaminants such as dust, oil, and water droplets during vehicle operation, thus avoiding short circuits or degradation of insulation performance. The heat dissipation holes 401 on the front and rear side panels of the protective cover 4 provide natural convection channels for internal heat flow, balancing protection and basic heat dissipation needs. A controller 7 is mounted on the outer end face of the protective cover 4, with a probe 701 mounted at the front end and a temperature sensor 7011 mounted at the end. The temperature sensor 7011, located inside the protective cover 4, directly collects the ambient temperature around the processing unit 3 and converts the analog temperature signal into a digital signal, transmitting it to the controller 7. The controller 7 is equipped with automotive-grade power devices. The temperature sensor 7011 detects that the internal temperature of the protective cover 4 is lower than the temperature threshold. The controller 7 determines that the heat generation of the processing unit 3 is within the normal range. At this time, natural convection heat dissipation is achieved only through the heat dissipation holes 401 of the protective cover 4. The fan 501 remains off to reduce the power consumption of the device. When the temperature is higher than the warning value, the controller 7 determines that the heat generation of the processing unit 3 exceeds the natural heat dissipation capacity. It immediately sends a start signal to the fan 501 inside the ventilation duct 5. The fan 501 starts to run, accelerating the flow of hot air inside the protective cover 4. The hot air is discharged through the heat dissipation holes 401 of the protective cover 4, while the external cold air is drawn in by the fan 501 to quickly reduce the temperature of the processing unit 3.The connecting pipe 6 is connected to the internal thread of the ventilation pipe 5 via a threaded front end. The filter 602 inside the connecting pipe 6 filters the external air drawn in by the fan 501, preventing dust, sand, lint, and other impurities from entering the protective cover 4. The retaining ring 601 on the outer end face of the connecting pipe 6 limits the depth to which it is screwed into the ventilation pipe 5, preventing over-tightening that could deform the filter 602 or clog the ventilation channel. If the filter 602 becomes clogged after prolonged use, it can be removed from the ventilation pipe 5 by rotating the connecting pipe 6, allowing for direct replacement or cleaning of the filter 602 without disassembling the protective cover 4 or the processing unit 3. This significantly reduces maintenance difficulty and time costs, meeting the convenience requirements of automotive aftermarket maintenance.

Claims

1. An automotive-grade intelligent power switching device, characterized in that, Includes: a base plate (1), on the left and right sides of the surface of the base plate (1) are respectively provided with a set of connecting holes (101), and two pads (103) are welded to the upper end of the base plate (1); a rubber pad (2), the rubber pad (2) is located below the base plate (1); a processing unit (3), the processing unit (3) is located above the base plate (1), and a connecting plate (301) is installed at the left and right ends of the processing unit (3), and the surface of the connecting plate (301) is uniformly provided with through holes; a protective cover (4), the protective cover (4) is fixedly installed above the base plate (1), a ventilation pipe (5) is welded to the right end of the protective cover (4), a fan (501) is installed inside the ventilation pipe (5), and an intelligent monitoring mechanism is fixedly installed on the outer end of the protective cover (4); a connecting pipe (6), the outer end of the connecting pipe (6) is provided with threads, and a filter screen (602) is installed inside the connecting pipe (6).

2. The automotive-grade intelligent power switching device according to claim 1, characterized in that, The intelligent monitoring mechanism includes: The controller (7) is fixedly installed on the outer end face of the protective cover (4). A probe rod (701) is fixedly installed at the front end of the controller (7). A temperature sensor (7011) is installed at the end of the probe rod (701). The temperature sensor (7011) is located inside the protective cover (4). The controller (7) is electrically connected to the fan (501).

3. The automotive-grade intelligent power switching device according to claim 1, characterized in that, The upper end face of the rubber pad (2) is fixedly installed with a limiting block (201), and the lower end face of the base plate (1) is evenly installed with slots (102). The limiting block (201) is engaged in the slots (102) on the lower end face of the base plate (1).

4. The automotive-grade intelligent power switching device according to claim 1, characterized in that, A retaining ring (601) is fixedly installed on the outer end face of the connecting pipe (6), and a thread is provided on the inner end face of the ventilation pipe (5). The front end of the connecting pipe (6) is threadedly connected to the inside of the ventilation pipe (5).

5. The automotive-grade intelligent power switching device according to claim 1, characterized in that, The surface of the pad (103) is uniformly provided with threaded holes, and the surface of the connecting plate (301) is uniformly provided with threaded holes. The connecting plate (301) and the pad (103) are connected by bolts.

6. The automotive-grade intelligent power switching device according to claim 1, characterized in that, The protective cover (4) has heat dissipation holes (401) evenly distributed on the front and rear side plates, and the processing unit (3) is located inside the protective cover (4).

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