Water-cooled power supply device of vehicle-mounted fuel cell, fuel cell with water-cooled power supply device and vehicle

Abstract

The invention discloses a water-cooled power supply device of a vehicle-mounted fuel cell, a fuel cell with the water-cooled power supply device and a vehicle, the water-cooled power supply device comprises a water-cooled radiator and silicon carbide devices, the two side surfaces of the water-cooled radiator are both provided with a plurality of silicon carbide devices side by side, and an insulating heat-conducting plate is arranged between the water-cooled radiator and the silicon carbide devices; a flow channel is arranged in the water-cooling radiator, and a water inlet connector and a water outlet connector which are communicated with the flow channel are arranged on the two sides of the upper end of the water-cooling radiator respectively. Cooling water provided by external cooling equipment enters the flow channel through the water inlet connector to conduct heat exchange cooling on the silicon carbide devices on the two sides of the water-cooling radiator, and the cooling water obtained after heat exchange is discharged through the water outlet connector and sent back to the external cooling equipment to be machined and cooled to be recycled. The power device has the advantages of being high in integration level, good in heat dissipation effect, capable of meeting the insulation requirement and the like, the heat dissipation performance and safety of the power device are improved, the power density of a product is improved, the installation space requirement is reduced, and the miniaturization and light-weight development requirements of a rail transit power source are met.

Description

Technical Field

[0001] The present invention belongs to the technical field of power supply cooling equipment, and in particular relates to a water-cooled power supply device for a vehicle-mounted fuel cell, a fuel cell having the same, and a vehicle. Background Art

[0002] As a green, efficient and sustainable new energy, hydrogen energy is regarded as the clean energy with the greatest development potential in the 21st century. As the main carrier of hydrogen energy utilization, hydrogen fuel cells have the advantages of high power generation efficiency, low environmental pollution, high specific energy and low noise, and have broad application prospects in the field of rail transit. The DC / DC power supply device is an important part of the fuel-electric system of rail transit hydrogen trains. It converts the fuel cell voltage with soft output characteristics and slow response into a DC voltage with stable output and fast response, and supplies power to subsequent traction converters, auxiliary converters and other equipment.

[0003] The traditional rail transit vehicle fuel cell DC / DC power supply device adopts forced air cooling. Due to the existence of the heat dissipation duct, the protection design of the power supply device is difficult, resulting in poor sealing. Long-term operation will cause a large amount of dust to enter the box and stick to the charged devices, thereby affecting the insulation performance of the devices and reducing the reliability of the product. In addition, when the power density is increased without changing the volume, the heat density increases, and forced air cooling restricts the increase in power density, which cannot meet the development needs of miniaturization and lightweight of rail transit power supplies. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a water-cooled power supply device for a vehicle-mounted fuel cell with a compact structure, high integration, significant heat dissipation effect and the ability to meet insulation requirements, a fuel cell having the same and a vehicle.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A water-cooled power supply device for a vehicle-mounted fuel cell comprises: a water-cooled radiator and a silicon carbide device, wherein a plurality of silicon carbide devices are arranged side by side on both the front and back sides of the water-cooled radiator, and an insulating heat-conducting plate is arranged between the water-cooled radiator and the silicon carbide device, a flow channel is arranged inside the water-cooled radiator, and a water inlet joint and a water outlet joint communicating with the flow channel are respectively arranged on both sides of the upper end of the water-cooled radiator; cooling water provided by an external cooling device enters the flow channel through the water inlet joint, cools and dissipates the silicon carbide devices on both sides of the water-cooled radiator, and the cooling water after heat exchange is discharged through the water outlet joint and sent back to the external cooling device for processing and cooling before recycling.

[0007] As a further improvement of the present invention, it also includes an elastic pressure plate, one end of which is detachably connected to the water-cooled radiator, and the other end of the elastic pressure plate is pressed tightly against the surface of the silicon carbide device to achieve a fixed connection between the silicon carbide device and the water-cooled radiator.

[0008] As a further improvement of the present invention, a plurality of mounting holes are arranged side by side on the water-cooling radiator, and bolts are installed in the mounting holes to achieve a detachable connection between the elastic pressure plate and the water-cooling radiator.

[0009] As a further improvement of the present invention, an insulating plate is also included, which is detachably mounted on the end of the water-cooled radiator to achieve an electrical gap between the mounting pins of the silicon carbide device and the water-cooled radiator.

[0010] As a further improvement of the present invention, it also includes a temperature sensor, which is detachably mounted on the water-cooled radiator by bolts, and the temperature sensor is close to the water outlet joint. The temperature rise of the water-cooled radiator is sampled by the temperature sensor and transmitted to the control unit.

[0011] As a further improvement of the present invention, the contact surface between the temperature sensor and the water-cooled radiator is coated with a heat-conducting material.

[0012] As a further improvement of the present invention, both the front and back surfaces of the insulating heat-conducting plate are evenly coated with a thermally conductive silicone grease material.

[0013] As a further improvement of the present invention, the flow channels are series-parallel flow channels.

[0014] As a general technical concept, the present invention also provides a fuel cell, including the above-mentioned water-cooled power supply device.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] 1. The water-cooled power supply device of the vehicle-mounted fuel cell of the present invention, the fuel cell and the vehicle having the same, are characterized by arranging a plurality of silicon carbide devices side by side on both the front and rear sides of the water-cooled radiator, and an insulating heat-conducting plate is arranged between the water-cooled radiator and the silicon carbide device, a flow channel is arranged inside the water-cooled radiator, and a water inlet joint and a water outlet joint communicating with the flow channel are respectively arranged on both sides of the upper end of the water-cooled radiator, so that a power supply device with compact structure, miniaturization, lightness, high integration and meeting insulation requirements is formed; the cooling water provided by the external cooling device enters the flow channel through the water inlet joint, cools and dissipates the silicon carbide devices on both sides of the water-cooled radiator, and the cooling water after heat exchange is discharged through the water outlet joint and sent back to the external cooling device for processing and cooling and then recycled, so that uniform heat dissipation of the silicon carbide device is achieved, the heat dissipation performance and safety of the power device are improved, and the power density of the product is improved, which well solves the heat dissipation problem of large-power power supply and small-size design, the insulation and heat conduction problem of silicon carbide device, the arrangement and space utilization problem of silicon carbide device, the uneven heat dissipation problem of silicon carbide device and the fixation problem of silicon carbide device.

[0017] 2. The water-cooled power supply device of the vehicle-mounted fuel cell of the present invention, the fuel cell and the vehicle having the same have a large power supply power and require a small size and light weight. Therefore, a water-cooling structure is adopted without an air duct. The box body adopts a fully sealed structure with good sealing effect. The present invention is a small-sized vertical water-cooled plate assembly that can dissipate heat on both sides. It can solve the problem of high-power heat dissipation and meet the requirements of miniaturization and lightweight. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structural principle of a power supply water cooling device in a specific embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the structural principle of the power supply water cooling device from another perspective in a specific embodiment of the present invention.

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure principle of a water-cooled radiator in a specific embodiment of the present invention.

[0021] Legend: 1. Water-cooled radiator; 2. Silicon carbide device; 3. Insulation plate; 4. Temperature sensor; 5. Insulation heat conductive plate; 6. Elastic pressure plate; 7. Bolt; 8. Water inlet joint; 9. Water outlet joint; 10. Flow channel; 11. Mounting hole. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0023] Example

[0024] like Figures 1 to 3As shown, the water-cooled power supply device of the vehicle-mounted fuel cell of the present invention comprises: a water-cooled radiator 1 and a silicon carbide device 2. In order to improve the utilization rate of the radiator, the silicon carbide power devices are distributed on the front and back sides of the water-cooled radiator, and 4 silicon carbide devices are arranged on each of the front and back sides. An insulating heat-conducting plate 5 is provided between the water-cooled radiator 1 and the silicon carbide device 2. A flow channel 10 is provided inside the water-cooled radiator 1. A water inlet joint 8 and a water outlet joint 9 connected to the flow channel 10 are provided on both sides of the upper end of the water-cooled radiator 1. The cooling water provided by the external cooling device enters the flow channel 10 through the water inlet joint 8 through the delivery pipeline, cools and dissipates the silicon carbide devices 2 on both sides of the water-cooled radiator 1, and the cooling water after heat exchange is discharged through the water outlet joint 9 and sent back to the external cooling device for processing and cooling before recycling.

[0025] In this embodiment, To 247 packaged SiC devices are arranged on both sides of the substrate of the water-cooled radiator 1, and the water-cooled radiator is installed vertically in the overall layout of the vehicle-mounted power supply, which enhances the utilization of the effective space and maximizes the heat dissipation space. Considering that the water-cooled radiator 1 must meet both the insulation requirements and the heat conduction requirements, and the silicon carbide device 2 works in a high-voltage and high-current environment for a long time, an insulating heat-conducting plate 5 is added between the water-cooled radiator 1 and the silicon carbide device 2. The insulating heat-conducting plate 5 has high insulation and good thermal conductivity. At the same time, in order to meet the smaller contact thermal resistance between each other, thermal conductive silicone grease is evenly coated on both sides of the insulating heat-conducting plate 5.

[0026] Furthermore, if Figure 3 As shown, the flow channel 10 is a series-parallel flow channel. The mounting substrate of the To 247 packaged SiC device adopts a multi-branch series connection method, and the two sides are symmetrically arranged. To ensure cooling uniformity, the flow channel 10 is designed as a series-parallel flow channel, so that the cooling water can flow back and forth through the heat dissipation device multiple times, ensuring that the temperature rise of the device itself and between devices is relatively uniform, while preventing local overheating.

[0027] like Figure 1 As shown, in this embodiment, an elastic pressing plate 6 is further included. One end of the elastic pressing plate 6 is detachably connected to the water cooling radiator 1, and the other end of the elastic pressing plate 6 is pressed tightly against the surface of the silicon carbide device 2 to achieve a fixed connection between the silicon carbide device 2 and the water cooling radiator 1.

[0028] Furthermore, a plurality of mounting holes 11 are arranged side by side on the upper portion of the water-cooled radiator 1 , and bolts 7 are installed in the mounting holes 11 to achieve a detachable connection between the elastic pressure plate 6 and the water-cooled radiator 1 .

[0029] In this embodiment, the silicon carbide device 2 and the water-cooled radiator 1 are fixed by an elastic pressing plate 6. One end of the elastic pressing plate 6 is fastened to the water-cooled radiator 1 by a bolt 7, and the other end of the elastic pressing plate 6 is pressed against the insulating shell of the silicon carbide device 2. By tightening the mounting bolt 7, the silicon carbide device 2 and the water-cooled radiator 1 can be fixed. The elastic force can be adjusted by the angle of the elastic pressing plate 6 to adapt to devices of different models.

[0030] like Figure 1 As shown, in this embodiment, an insulating plate 3 is also included. The insulating plate 3 can be detachably mounted on the end of the water-cooled radiator 1 to achieve an electrical gap between the mounting pins of the silicon carbide device 2 and the water-cooled radiator 1 .

[0031] Specifically, the water-cooled radiator 1 can effectively solve the problem of poor air-cooling sealing. The power supply device of this embodiment fully considers the insulation problem of To 247 packaged SiC devices, and designs enhanced insulation parts at its electrical ends. The insulating plate 3 mainly ensures the electrical gap between the mounting pins of the silicon carbide device 2 and the water-cooled radiator 1, avoids direct contact between the radiator and the PCB board, and increases the creepage distance between the radiator and the silicon carbide device pins and the PCB board, so as to solve the problem of device insulation shortcomings.

[0032] like Figure 1 As shown, in this embodiment, a temperature sensor 4 is also included. The temperature sensor 4 is detachably mounted on the water cooling radiator 1 by means of bolts 7, and the temperature sensor 4 is close to the water outlet joint 9. The temperature rise of the water cooling radiator 1 is sampled by the temperature sensor 4 and transmitted to the control unit.

[0033] Furthermore, the contact surface between the temperature sensor 4 and the water-cooled radiator 1 is coated with a heat-conducting material to improve the accuracy of temperature detection.

[0034] In this embodiment, a fuel cell including the above-mentioned water-cooled power supply device is also provided, and the fuel cell can be applied to a hydrogen train.

[0035] In this embodiment, a vehicle including the above-mentioned fuel cell is also provided, and the vehicle may be a rail transit vehicle.

[0036] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the spirit and technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still fall within the scope of protection of the technical solutions of the present invention.

Claims

1. A water-cooled power supply device for a vehicle-mounted fuel cell, characterized in that, it includes: A water-cooled radiator (1) and silicon carbide devices (2). Multiple silicon carbide devices (2) are arranged side by side on both the front and back sides of the water-cooled radiator (1), and an insulating heat-conducting plate (5) is provided between the water-cooled radiator (1) and the silicon carbide devices (2). A flow channel (10) is provided inside the water-cooled radiator (1). An inlet joint (8) and an outlet joint (9) communicating with the flow channel (10) are respectively provided on both sides of the upper end of the water-cooled radiator (1). The cooling water provided by an external cooling device enters the flow channel (10) through the inlet joint (8), cools and dissipates heat from the silicon carbide devices (2) on both sides of the water-cooled radiator (1), and the heat-exchanged cooling water is discharged through the outlet joint (9) and sent back to the external cooling device for processing and cooling and then recycled.

2. The water-cooled power supply device for a vehicle-mounted fuel cell according to claim 1, characterized in that, it further includes an elastic pressing plate (6). One end of the elastic pressing plate (6) is detachably connected to the water-cooled radiator (1), and the other end of the elastic pressing plate (6) presses against the surface of the silicon carbide device (2) to realize the fixed connection between the silicon carbide device (2) and the water-cooled radiator (1).

3. The water-cooled power supply device for a vehicle-mounted fuel cell according to claim 2, characterized in that, multiple mounting holes (11) are arranged side by side on the water-cooled radiator (1), and by installing bolts (7) in the mounting holes (11), the detachable connection between the elastic pressing plate (6) and the water-cooled radiator (1) is realized.

4. The water-cooled power supply device for a vehicle-mounted fuel cell according to claim 1, characterized in that, it further includes an insulating plate (3). The insulating plate (3) is detachably installed at the end of the water-cooled radiator (1) to create an electrical clearance between the mounting pins of the silicon carbide device (2) and the water-cooled radiator (1).

5. The water-cooled power supply device for a vehicle-mounted fuel cell according to any one of claims 1 to 4, characterized in that, it further includes a temperature sensor (4). The temperature sensor (4) is detachably installed on the water-cooled radiator (1) by bolts (7), and the temperature sensor (4) is close to the outlet joint (9). The temperature rise of the water-cooled radiator (1) is sampled and transmitted to the control unit by the temperature sensor (4).

6. The water-cooled power supply device for a vehicle-mounted fuel cell according to claim 5, characterized in that, a heat-conducting material is coated on the contact surface between the temperature sensor (4) and the water-cooled radiator (1).

7. The water-cooled power supply device for a vehicle-mounted fuel cell according to any one of claims 1 to 4, characterized in that, heat-conducting silicone grease-like materials are evenly coated on both the front and back sides of the insulating heat-conducting plate (5).

8. The water-cooled power supply device for a vehicle-mounted fuel cell according to any one of claims 1 to 4, characterized in that, the flow channel (10) adopts a series-parallel flow channel.

9. A fuel cell, characterized in that, it includes the water-cooled power supply device for a vehicle-mounted fuel cell according to any one of claims 1 to 8.

10. A vehicle, characterized in that, it includes the fuel cell according to claim 9.

Images