Capacitor self-heat-dissipation waterway motor controller power brick and automobile

Abstract

This utility model discloses a motor controller power brick with a built-in heat dissipation water channel and an automobile, relating to the field of automotive electrical structures. It includes a capacitor and a power component, which are attached together. The outer surface of the capacitor is a metal shell. A first water channel structure is provided on the outer surface of the capacitor near the power component, and a second water channel structure is provided on the outer surface of the power component near the capacitor. When the capacitor and power component are attached together, the first and second water channel structures connect to form a heat dissipation water channel structure. This power brick adds a first water channel structure to the capacitor and combines it with the second water channel structure of the power component to form a shared heat dissipation water channel, which not only improves heat dissipation performance but also reduces the size of the power brick itself.

Description

Technical Field

[0001] This utility model belongs to the field of automotive electrical structure, and more specifically, relates to a motor controller power brick with a capacitor having its own heat dissipation water circuit and an automobile. Background Technology

[0002] With the urgent need for "smaller, lighter, and higher power density" motor controllers in applications such as new energy vehicles, high-end servo drives, and aerospace electric actuators, the power brick, as the core module of the power conversion unit, has seen its power density become one of the key bottlenecks restricting the improvement of overall machine performance.

[0003] Existing power bricks generally adopt a sandwich structure of "power component + DC support capacitor + cooling substrate":

[0004] Power components (IGBT / SiC MOSFET, etc.) are directly soldered or sintered on a metallized ceramic substrate, and heat dissipation is achieved through thermal grease and a cooling plate below.

[0005] DC support capacitors are mounted on the side or top of the power components in the form of independent plastic or metal shells, relying solely on natural convection or forced air cooling for heat dissipation.

[0006] The cooling channel is only located below the power components. The water path is short and the cross-section is limited. The coolant flow rate is high, but the heat dissipation area utilization rate is low.

[0007] This traditional design leads to problems such as heat dissipation difficulties, volume redundancy, and dispersed water circuit structure. Therefore, how to improve the heat dissipation efficiency of power components and DC support capacitors within a limited volume, and simplify the cooling system, is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing a motor controller power brick with a built-in cooling water channel for the capacitor and an automobile. This power brick adds a first water channel structure to the capacitor and combines it with the second water channel structure of the power component to form a shared cooling water channel, which not only improves heat dissipation performance but also reduces the size of the power brick itself.

[0009] To achieve the above objectives, this utility model provides a motor controller power brick with a built-in heat dissipation water circuit for the capacitor, comprising:

[0010] A capacitor and a power component are attached to each other. The outer surface of the capacitor is a metal shell. A first water channel structure is provided on the outer surface of the capacitor near the power component. A second water channel structure is provided on the outer surface of the power component near the capacitor.

[0011] When the capacitor is attached to the power component, the first water channel structure and the second water channel structure are connected to form a heat dissipation water channel structure.

[0012] Preferably, the first water channel structure includes a water tank and multiple partitions. The water tank is disposed on the outer surface of the capacitor, and the partitions are arranged parallel to each other inside the water tank. The water tank is divided by the partitions to form multiple parallel water channels.

[0013] Preferably, the capacitor is provided with an inlet and an outlet at its two ends, one end of which is connected to the bottom of the water tank, and the other end of which extends through the outer surface of the capacitor on the side away from the power component.

[0014] Preferably, the second water channel structure includes a sealing plate, which is disposed on the outer surface of the power component near the capacitor, and the outer contour of the sealing plate corresponds to the outer contour of the top opening of the water tank.

[0015] Preferably, the height of the water tank is the same as the height of the partition.

[0016] Preferably, a sealing ring is provided between the outer contour of the sealing plate and the outer contour of the top opening of the water tank.

[0017] Preferably, the partition is a metal plate.

[0018] Preferably, the inlet and the outlet have the same cross-section, and the inlet and the outlet are centrally located in the width direction of the capacitor.

[0019] Preferably, the capacitor and the power component are bolted together.

[0020] This utility model also provides an automobile, including the above-mentioned motor controller power brick with a built-in cooling water circuit for the capacitor.

[0021] This utility model provides a motor controller power brick with a built-in cooling water channel in the capacitor and an automobile. Its beneficial effects are as follows: the power brick has a first water channel structure set in the capacitor, and multiple metal partitions are set in the first water channel structure. In this way, the metal partitions can transfer the internal heat of the power to the coolant flowing in the water tank. In addition, the coolant flows in the cavity between the water tank and the sealing plate. Similarly, the coolant can carry away the heat dissipated from the power component. The cooling water channel structure formed together can realize the common heat dissipation of the capacitor and the power component, thereby improving the cooling efficiency.

[0022] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0023] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0024] Figure 1 A schematic diagram of the structure of a motor controller power brick with a built-in heat dissipation water circuit according to an embodiment of the present invention is shown.

[0025] Figure 2 A schematic diagram of the top surface structure of a capacitor according to an embodiment of the present invention is shown.

[0026] Figure 3 A schematic diagram showing the positions of the water inlet and outlet on a capacitor according to an embodiment of the present invention is shown.

[0027] Figure 4 A schematic diagram of the coolant flow path of a motor controller power brick with a built-in heat dissipation water circuit according to an embodiment of the present invention is shown.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Capacitor; 2. Power components; 3. Water tank; 4. Partition; 5. Water channel; 6. Inlet; 7. Outlet. Detailed Implementation

[0030] Preferred embodiments of the present invention will now be described in more detail. While preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0031] like Figure 1 As shown, this utility model provides a motor controller power brick with a capacitor and a built-in heat dissipation water circuit, comprising:

[0032] Capacitor 1 and power component 2 are attached to each other. The outer surface of capacitor 1 is a metal shell. The top surface of capacitor 1 is provided with a first water channel structure, and the bottom surface of power component 2 is provided with a second water channel structure.

[0033] When capacitor 1 is attached to power component 2, the first water channel structure and the second water channel structure are connected to form a heat dissipation water channel structure.

[0034] Specifically, the power brick includes a capacitor 1 located at the bottom and a power component 2 located at the top, which are connected by multiple bolts. The top surface of the capacitor 1 is in contact with the bottom surface of the power component 2. A first water channel structure is provided on the top surface of the capacitor 1, and a second water channel structure is provided on the bottom surface of the power component 2. When the capacitor 1 and the power component 2 are connected and fixed, the first water channel structure and the second water channel structure can be spliced ​​together to form a heat dissipation water channel structure. Since the capacitor 1 uses a metal shell, the heat released from the capacitor 1 and the power component 2 is carried away by the flowing coolant in the heat dissipation water channel structure. Furthermore, setting a heat dissipation water channel structure on the power brick can realize the heat dissipation of both components, saving the overall volume of the power brick and increasing the power density of the power brick.

[0035] like Figure 2 As shown, the first water channel structure includes a water tank 3 and multiple partitions 4. The water tank 3 is disposed on the outer surface of the capacitor 1, and the partitions 4 are arranged parallel to each other inside the water tank 3. The water tank is divided by the partitions to form multiple parallel water channels 5.

[0036] Specifically, the first water channel structure includes a water tank 3 on the top surface of capacitor 1. Multiple parallel partitions 4 are also set in the water tank 3. The partitions 4 are perpendicular to the bottom surface of the water tank 3. The partitions can divide the water tank into multiple water channels 5. All water channels 5 are set parallel to each other. In this way, the water tank 3 occupies a large area on the top surface of capacitor 1, which can improve the heat dissipation efficiency of capacitor 1.

[0037] Preferably, the partition 4 is a metal plate.

[0038] Specifically, the partition 4 is also made of metal plate, so that the metal shell of capacitor 1 conducts heat to water tank 3, and water tank 3 then disperses the heat through partition 4. Partition 4 acts as heat dissipation teeth, so that heat can be transferred to the flowing coolant through multiple partitions 4 and multiple water channels 5, thereby improving heat dissipation efficiency.

[0039] like Figure 3 As shown, capacitor 1 has an inlet 6 and an outlet 7 at its two ends. One end of inlet 6 and outlet 7 is connected to the bottom of water tank 3, and the other end of inlet 6 and outlet 7 passes through the bottom surface of capacitor 1.

[0040] Specifically, in order to ensure that there is always coolant flowing in the first water channel structure, an inlet 6 and an outlet 7 are respectively set at both ends of the capacitor 1. The inlet 6 and the outlet 7 are actually a channel for water to enter and exit. The inlet of the inlet 6 and the outlet of the outlet 7 are both located on the bottom surface of the capacitor 1. In this way, when the coolant passes through the inlet 6 and the outlet 7, it will also carry away the heat from both ends of the capacitor 1.

[0041] Preferably, the second water channel structure includes a sealing plate, which is disposed on the outer surface of the power component 2 near the capacitor 1, and the outer contour of the sealing plate corresponds to the outer contour of the top opening of the water tank 3.

[0042] Preferably, the height of the water tank 3 is the same as the height of the partition 4.

[0043] Specifically, since the height of the water tank 3 is the same as the height of the partition 4, after the power component 2 is connected to the capacitor 1, the sealing plate in the second water channel structure will fit against the water tank 3 in the first water channel structure. In this way, the sealing plate can seal the top of the water tank 3. With the combination of the water tank 3, the partition 4 and the sealing plate, multiple closed water channels 5 can be formed. The coolant in the water channel will not be exposed to the capacitor 1 and the power component 2, so as to avoid affecting the normal use of the power brick.

[0044] Preferably, a sealing ring is provided between the outer contour of the sealing plate and the outer contour of the top opening of the water tank.

[0045] Preferably, the capacitor and power components are bolted together.

[0046] Specifically, the top opening contour of the water tank 3 in the first water channel structure is the same as the sealing plate contour of the second water channel structure. In this way, after the capacitor 1 and the power component 2 are connected by multiple bolts, the first water channel structure and the second water channel structure can form a closed channel for coolant flow. A sealing ring is also added between the two to improve the sealing effect and make the power brick more stable in automobiles.

[0047] Preferably, the inlet 6 and the outlet 7 have the same cross-section, and the inlet 6 and the outlet 7 are centered in the width direction of the capacitor 1.

[0048] Specifically, the inlet 6 and outlet 7 have the same cross-section, so that the coolant entering the heat dissipation water circuit structure can flow at a uniform speed. This allows the coolant to have a longer contact time with the power brick, thus removing more heat. The inlet 6 and outlet 7 are centered in the width direction of the capacitor 1, so that the end of the capacitor 1 can be evenly cooled when the coolant enters and flows out of the power brick.

[0049] This utility model also provides an automobile, including the above-mentioned motor controller power brick with a built-in cooling water circuit for the capacitor.

[0050] Specifically, the power brick includes a capacitor 1 and a power component 2. The capacitor 1 has a metal casing, and the capacitor 1 and the power component 2 are connected by threaded connections and sealing rings to form a closed heat dissipation water channel structure. This heat dissipation water channel structure dissipates heat for both the capacitor 1 and the power component 2. The capacitor 1 is replaced by a metal forced water cooling system instead of the traditional plastic casing with no heat dissipation. While maintaining performance, the capacitor 1 is effectively reduced in size, and the power density of the power brick can be increased.

[0051] like Figure 4 As shown, the heat dissipation method of this power brick is as follows: Capacitor 1 uses a metal shell, which, through threaded connection and sealing ring, forms a heat dissipation water channel structure with the power component 2. Coolant enters capacitor 1 through inlet 6, and then flows through multiple water channels 5, thus carrying away the heat from capacitor 1 and power component 2, and flows out of the power brick from outlet 7. This heat dissipation method can dissipate heat from both the capacitor and the power component simultaneously, effectively reducing the overall size of the power brick.

[0052] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A motor controller power brick with a capacitor and built-in heat dissipation water circuit, characterized in that, include: A capacitor and a power component are attached to each other. The outer surface of the capacitor is a metal shell. A first water channel structure is provided on the outer surface of the capacitor near the power component. A second water channel structure is provided on the outer surface of the power component near the capacitor. When the capacitor is attached to the power component, the first water channel structure and the second water channel structure are connected to form a heat dissipation water channel structure.

2. The motor controller power brick with a built-in heat dissipation water circuit for the capacitor according to claim 1, characterized in that, The first water channel structure includes a water tank and multiple partitions. The water tank is disposed on the outer surface of the capacitor, and the partitions are arranged parallel to each other inside the water tank. The water tank is divided by the partitions to form multiple parallel water channels.

3. The motor controller power brick with a built-in heat dissipation water circuit for the capacitor according to claim 2, characterized in that, The capacitor has an inlet and an outlet at its two ends, respectively. One end of the inlet and the outlet are connected to the bottom of the water tank, and the other end of the inlet and the outlet penetrates the outer surface of the capacitor on the side away from the power component.

4. The motor controller power brick with built-in heat dissipation water circuit according to claim 3, characterized in that, The second water channel structure includes a sealing plate, which is disposed on the outer surface of the power component near the capacitor, and the outer contour of the sealing plate corresponds to the outer contour of the top opening of the water tank.

5. The motor controller power brick with a built-in heat dissipation water circuit for the capacitor according to claim 4, characterized in that, The height of the water tank is the same as the height of the partition.

6. The motor controller power brick with a built-in heat dissipation water circuit for the capacitor according to claim 4, characterized in that, A sealing ring is provided between the outer contour of the sealing plate and the outer contour of the top opening of the water tank.

7. The motor controller power brick with a built-in heat dissipation water circuit for the capacitor according to claim 2, characterized in that, The partition is a metal plate.

8. The motor controller power brick with a built-in heat dissipation water circuit for the capacitor according to claim 3, characterized in that, The inlet and outlet have the same cross-section and are centered in the width direction of the capacitor.

9. The motor controller power brick with a built-in heat dissipation water circuit for the capacitor according to claim 1, characterized in that, The capacitor and the power component are bolted together.

10. A car, characterized in that, Including the motor controller power brick with a built-in heat dissipation water circuit for the capacitor as described in any one of claims 1-9.

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