Inverter brick power module and matched heat dissipation module thereof

Abstract

The invention relates to the technical field of power modules, and discloses an inverter brick power module, which comprises a power module, the back surface of the power module is fixedly connected with a radiator, the radiator is fixed on a shell through a radiator fixing bolt, and the power module is positioned below a PCB (Printed Circuit Board) and is arranged on the side surface of a capacitor. The power module, the thin-film capacitor and the PCB are integrated together to form the power brick, the size is small, the structure is compact, whole vehicle arrangement is facilitated, the ESL is reduced compared with an existing product in the current market, the product performance is greatly improved, meanwhile, through high integration, the product cost is effectively reduced, and the power brick is suitable for large-scale popularization and application. The area space on the back face of the power module can be used as the potting space for potting the thin-film capacitor, the rear space of the power module is fully used, the envelope size of the thin-film capacitor can be reduced after installation, and the more compact motor controller design is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of power modules, in particular to an inverter brick power module and a matching heat dissipation module. Background Art

[0002] In recent years, electric vehicles have been moving towards high integration with the development of technology. The high integration of electric vehicles refers to the integration of multiple functional modules or systems into a more compact and efficient overall architecture during the design and production of electric vehicles. This integration not only improves the performance, efficiency and safety of the vehicle, but also reduces costs and improves production efficiency. With the development of high integration of electric vehicles, power units are also integrating more and more functional modules, such as the integration of motors and power modules, which not only improves driving efficiency, but also reduces space occupancy, providing higher degrees of freedom for the layout of the member compartment.

[0003] However, during the layout process, the existing power modules occupy a large space due to their large size and have poor heat dissipation. Therefore, an inverter brick power module and a matching heat dissipation module are proposed to solve the above-mentioned problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an inverter brick power module and a matching heat dissipation module in view of the deficiencies in the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an inverter brick power module, including a power module, a heat sink is fixedly connected to the back of the power module, the heat sink is fixed to the shell by heat sink fixing bolts, the power module is located below the PCB board and arranged on the side of the capacitor, the shell integral injection molded embedded copper bar is welded to the bent module DC copper bar terminal of the power module, the shell integral injection molded embedded copper bar is welded to the bent module AC copper bar terminal of the power module, a capacitor potting area is provided on the shell, the shell has two functions, the integrated overmolding connects the power module and the copper bar of the capacitor by welding, and provides a capacitor potting cavity, the shell is integrally injection molded with the laminated copper bar, and provides a capacitor potting space, and the laminated copper bar adopts an integrated injection molding mode; The shell is provided with a cooling water channel, the cooling water channel is parallel to the power module, the cooling water channel is provided with a cooling water channel inlet, and the cooling water channel is provided with a cooling water channel outlet; By integrating the power module, film capacitor and PCB together to form a power brick, it is not only small in size and compact in structure, which is convenient for vehicle layout, but also has a reduced ESL compared to existing products on the market, greatly improving product performance. At the same time, through high integration, the cost of the product is effectively reduced; the area on the back of the power module can be used as the potting space for the potting film capacitor, and the rear space of the power module can be fully utilized to reduce the installation envelope volume of the film capacitor and complete a more compact motor controller design; while maximizing the stacking of the T+ copper busbar and the T- copper busbar, the bending path is reduced to reduce costs, so that the size and path of the copper busbar from the capacitor to the power module can be shortened, thereby reducing the current path to ensure that the ESL loss is small.

[0006] Preferably, a cooling water channel inlet and a cooling water channel outlet on the cooling water channel are parallel to the power module.

[0007] Preferably, the power module is perpendicular to the PCB board and is connected by welding with module PIN pins.

[0008] A heat dissipation module matched with an inverter brick power module, used for the above-mentioned inverter brick power module, comprises a heat dissipation housing, and a blower mechanism is arranged on the heat dissipation housing; The blower mechanism comprises a mounting slot and a first motor, wherein the first motor is fixedly connected inside the mounting slot, the mounting slot is provided on the heat dissipation housing, and a fan blade is fixedly connected to the output end of the first motor; A through opening is provided on the heat dissipation shell, an air outlet is fixedly connected to the heat dissipation shell, and a guide plate is fixedly connected inside the air outlet.

[0009] Preferably, a magnetic ring is fixedly connected to the interior of the installation groove, a magnetic filter plate is magnetically attracted to the magnetic ring, and an air outlet is opened on the air outlet. By arranging the magnetic ring and the magnetic filter plate, the magnetic filter plate can be easily disassembled and cleaned.

[0010] Preferably, a guide mechanism is provided on the air outlet duct, and the guide mechanism includes an adjustment plate and a fixed plate, the adjustment plate is arranged inside the air outlet duct, and the fixed plate is fixedly connected to the heat dissipation shell, and the blowing direction can be guided and adjusted by the setting of the guide mechanism.

[0011] Preferably, a movable opening is provided on the air outlet duct, a tooth plate is slidably connected inside the movable opening, a second motor is fixedly connected to the fixed plate, and the setting of the movable opening can facilitate the tooth plate to drive the adjustment plate to move.

[0012] Preferably, a half gear is fixedly connected to the output end of the second motor, and the half gear is meshed with the tooth plate. A guide seat is fixedly connected to the air outlet duct, and a guide rod is slidably connected to the inside of the guide seat. One end of the guide rod is fixedly connected to the tooth plate. The arrangement of the guide rod and the guide seat can guide the tooth plate.

[0013] Preferably, a spring is sleeved on the guide rod, one end of the spring abuts against the tooth plate, and the other end of the spring abuts against the guide seat. The arrangement of the spring can facilitate the reciprocating motion of the adjustment plate.

[0014] Preferably, a positioning rod is fixedly connected to the inside of the air outlet duct, a guide plate is hinged on the adjustment plate through a pin shaft, a guide hole is opened on the guide plate, and the positioning rod is inserted into the inside of the guide hole. The setting of the guide plate can guide the windflow.

[0015] The present invention adopts the above technical solution to bring the following beneficial effects: 1. The inverter brick power module and its matching heat dissipation module integrate the power module, film capacitor and PCB to form a power brick. It is not only small in size and compact in structure, which is convenient for vehicle layout, but also has a smaller ESL than existing products on the market, which greatly improves product performance. At the same time, through high integration, it effectively reduces product costs.

[0016] 2. The inverter brick power module and its matching heat dissipation module can use the area on the back of the power module as the potting space for potting film capacitors, making full use of the rear space of the power module, which can reduce the installation envelope volume of the film capacitor and complete a more compact motor controller design.

[0017] 3. The inverter brick power module and its matching heat dissipation module maximize the stacking of T+ copper bars and T- copper bars while reducing the bending path and reducing costs. Therefore, the size and path of the copper bar from the capacitor to the power module can be shortened, thereby reducing the current path to ensure that the ESL loss is small.

[0018] 4. The inverter brick power module and its matching heat dissipation module are installed on the radiator with the air outlet facing the direction of the power module. When the power module needs to be cooled, the first motor is started to drive the fan blades to rotate to generate wind flow. The wind flow enters the air outlet through the opening, and the guide plate performs preliminary guide on the wind flow. Finally, the power module is cooled by blowing air through the air outlet, thereby improving the heat dissipation efficiency of the power module and making the power module more stable during operation.

[0019] 5. The inverter brick power module and its matching heat dissipation module start the second motor to drive the half gear to rotate, and the half gear will push the tooth plate to move, thereby driving the adjustment plate to move, so that the angle of the guide plate can be adjusted. When the wind passes through the guide plate, it will be guided by it, thereby increasing the range of wind blowing, and then increasing the heat dissipation area of ​​the power module. When the half gear is staggered with the tooth plate, the tooth plate is reset under the action of the spring, thereby achieving the purpose of sustainable adjustment of the guide plate angle, further improving the practicality of the heat dissipation module. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the arrangement structure of the power module and the capacitor of the present invention; Figure 2 This is a schematic diagram of the installation of a PCB board of the present invention; Figure 3 This is a schematic diagram of the cooling water channel of the power module; Figure 4 It is a front schematic diagram of the present invention; Figure 5 This is a schematic diagram of the inlet and outlet cross-section of the cooling water channel of the present invention; Figure 6 This is a schematic diagram of the heat dissipation module structure of the present invention; Figure 7 This is a schematic diagram of the back structure of the heat dissipation module of the present invention; Figure 8 This is a schematic diagram of the internal structure of the heat dissipation housing of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional structure of the heat dissipation housing of the present invention; Fig.10 It is a schematic diagram of the structure of the flow guiding mechanism of the present invention; Fig.11 It is a schematic diagram of the guide plate structure of the present invention.

[0021] In the figure: 1. power module; 2. heat sink; 3. housing; 4. PCB board; 5. heat sink housing; 11. module DC copper bus terminal; 12. module AC copper bus terminal; 13. module PIN pin; 21. heat sink fixing bolt; 31. housing integral injection molded embedded copper bus; 32. capacitor potting area; 33. cooling water channel; 34. cooling water channel inlet; 35. cooling water channel outlet; 51. blower mechanism; 5101. mounting slot; 5102. first motor; 5103. fan blade; 5104. 4. Through-port; 5105. Air outlet; 5106. Guide plate; 5107. Magnetic ring; 5108. Magnetic filter plate; 5109. Air outlet; 52. Guide mechanism; 5201. Adjustment plate; 5202. Fixing plate; 5203. Pin; 5204. Positioning rod; 5205. Guide plate; 5206. Guide hole; 5207. Tooth plate; 5208. Second motor; 5209. Half gear; 5210. Moving port; 5211. Guide seat; 5212. Guide rod; 5213. Spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "setting" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0026] See also Figure 1-5 , one embodiment of the present invention is: an inverter brick power module, including a power module 1, a heat sink 2 is fixedly connected to the back of the power module 1, the heat sink 2 is fixed to the shell 3 by a heat sink fixing bolt 21, the power module 1 is located below the PCB board 4, and is arranged on the side of the capacitor, the shell integral injection molded embedded copper bar 31 is welded with the module DC copper bar terminal 11 that has been bent of the power module 1, the shell integral injection molded embedded copper bar 31 is welded with the module AC copper bar terminal 12 that has been bent of the power module 1, and a capacitor potting area 32 is provided on the shell 3. The shell 3 has two functions, the integrated overmolding connects the power module 1 and the copper bar of the capacitor by welding, and provides a capacitor potting cavity at the same time, the shell 3 realizes integral injection molding with the laminated copper bar, and provides a capacitor potting space, and the laminated copper bar adopts an integral injection molding mode; By integrating the power module 1, the film capacitor and the PCB together to form a power brick, it is not only small in size and compact in structure, which is convenient for vehicle layout, but also has a reduced ESL compared to existing products on the market, which greatly improves product performance. At the same time, through high integration, the cost of the product is effectively reduced; the area on the back of the power module 1 can be used as the potting space for the potting film capacitor, and the rear space of the power module 1 can be fully utilized to reduce the installation envelope volume of the film capacitor and complete a more compact motor controller design; while maximizing the stacking of the T+ copper busbar and the T- copper busbar, the bending path is reduced to reduce costs, so that the size and path of the copper busbar from the capacitor to the power module 1 can be shortened, thereby reducing the current path to ensure that the ESL loss is small. The housing 3 is provided with a cooling water channel 33 , which is parallel to the power module 1 . The cooling water channel 33 is provided with a cooling water channel inlet 34 , and the cooling water channel 33 is provided with a cooling water channel outlet 35 .

[0027] The cooling water channel inlet 34 and the cooling water channel outlet 35 on the cooling water channel 33 are parallel to the power module 1 .

[0028] The power module 1 is perpendicular to the PCB board 4 and is connected by welding via the module PIN pins 13 .

[0029] Working principle: By integrating the power module 1, film capacitors and PCB together to form a power brick, it is not only small in size and compact in structure, which is convenient for vehicle layout, but also has a reduced ESL compared to existing products on the market, greatly improving product performance. At the same time, through high integration, the cost of the product is effectively reduced; the area on the back of the power module 1 can be used as the potting space for the potting film capacitor, and the rear space of the power module 1 can be fully utilized to reduce the installation envelope volume of the film capacitor and complete a more compact motor controller design; while maximizing the stacking of the T+ copper busbar and the T- copper busbar, the bending path is reduced to reduce costs, so that the size and path of the copper busbar from the capacitor to the power module 1 can be shortened, thereby reducing the current path to ensure that the ESL loss is small.

[0030] See also Figure 6-11 On the basis of the above embodiment, in another embodiment of the present invention, a heat dissipation module supporting an inverter brick power module is used for the above inverter brick power module, including a heat dissipation housing 5, and a blower mechanism 51 is provided on the heat dissipation housing 5; The blower mechanism 51 includes a mounting groove 5101 and a first motor 5102. The first motor 5102 is fixedly connected to the inside of the mounting groove 5101. The mounting groove 5101 is provided on the heat dissipation housing 5. A fan blade 5103 is fixedly connected to the output end of the first motor 5102. A through opening 5104 is provided on the heat dissipation housing 5 , an air outlet 5105 is fixedly connected to the heat dissipation housing 5 , and a guide plate 5106 is fixedly connected inside the air outlet 5105 .

[0031] A magnetic ring 5107 is fixedly connected to the inside of the mounting groove 5101, and a magnetic filter plate 5108 is magnetically attracted to the magnetic ring 5107. An air outlet 5109 is opened on the air outlet 5105. The magnetic ring 5107 and the magnetic filter plate 5108 can be easily disassembled and cleaned by arranging the magnetic filter plate 5108. By installing the heat dissipation module on the radiator 2, its air outlet 5109 is aligned with the direction of the power module 1. When the power module 1 needs to dissipate heat, the first motor 5102 is started to drive the fan blades 5103 to rotate to generate wind flow. The wind flow enters the air outlet 5105 through the opening 5104, and the guide plate 5106 performs preliminary guide on the wind flow. Finally, the power module 1 is blown and cooled through the air outlet 5109, thereby improving the heat dissipation efficiency of the power module 1 and making the power module 1 more stable during operation.

[0032] The air outlet duct 5105 is provided with a guide mechanism 52, which includes an adjustment plate 5201 and a fixed plate 5202. The adjustment plate 5201 is arranged inside the air outlet duct 5105, and the fixed plate 5202 is fixedly connected to the heat dissipation shell 5. The blowing direction can be guided and adjusted by the setting of the guide mechanism 52.

[0033] The air outlet 5105 is provided with a movable opening 5210 , and a tooth plate 5207 is slidably connected inside the movable opening 5210 . A second motor 5208 is fixedly connected to the fixed plate 5202 . The movable opening 5210 can facilitate the tooth plate 5207 to drive the adjustment plate 5201 to move.

[0034] A half gear 5209 is fixedly connected to the output end of the second motor 5208, and the half gear 5209 is meshed with the tooth plate 5207. A guide seat 5211 is fixedly connected to the air outlet duct 5105, and a guide rod 5212 is slidably connected inside the guide seat 5211. One end of the guide rod 5212 is fixedly connected to the tooth plate 5207. The arrangement of the guide rod 5212 and the guide seat 5211 can guide the tooth plate 5207.

[0035] A spring 5213 is sleeved on the guide rod 5212, one end of the spring 5213 abuts against the tooth plate 5207, and the other end of the spring 5213 abuts against the guide seat 5211. The arrangement of the spring 5213 can facilitate the reciprocating motion of the adjustment plate 5201.

[0036] A positioning rod 5204 is fixedly connected to the inside of the air outlet 5105, and a guide plate 5205 is hinged on the adjustment plate 5201 through a pin shaft 5203. The guide plate 5205 is provided with a guide hole 5206, and the positioning rod 5204 is inserted into the inside of the guide hole 5206. The setting of the guide plate 5205 can guide the wind flow.

[0037] Working principle: By installing the heat dissipation module on the radiator 2, its air outlet 5109 is aligned with the direction of the power module 1. When the power module 1 needs to be cooled, the first motor 5102 is started to drive the fan blades 5103 to rotate to generate wind flow, and the wind flow enters the air outlet 5105 through the opening 5104. The guide plate 5106 performs preliminary guide on the wind flow, and finally the power module 1 is cooled by blowing air through the air outlet 5109, thereby improving the heat dissipation efficiency of the power module 1 and making the power module 1 more stable during operation. By starting the second motor 5208 to drive the semi-gear When the wheel 5209 rotates, the half gear 5209 will push the tooth plate 5207 to move, thereby driving the adjustment plate 5201 to move, so that the angle of the guide plate 5205 can be adjusted. When the wind flows through the guide plate 5205, it will be guided by it, thereby increasing the range of wind blowing, and then increasing the heat dissipation area of ​​the power module 1. When the half gear 5209 is staggered with the tooth plate 5207, the tooth plate 5207 is reset under the action of the spring 5213, thereby achieving the purpose of sustainable adjustment of the angle of the guide plate 5205, and further improving the practicality of the heat dissipation module.

[0038] It should be noted that the present disclosure is not limited to the vertical arrangement of a single-side module with a PCB, and the addition and change of modules are carried out without departing from its scope. The scope of the present disclosure includes a single or two or more modules arranged vertically with a PCB board. The connection between the laminated copper busbar and the power module is not limited to welding, and can also be through terminal welding, crimping, etc.

[0039] The present invention provides an inverter brick power module and its supporting heat dissipation module. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. An inverter brick power module, comprising a power module (1), characterized in that: The back of the power module (1) is fixedly connected to a heat sink (2), the heat sink (2) being fixed to the housing (3) by heat sink fixing bolts (21), the power module (1) being located below the PCB board (4) and arranged on the side of the capacitor, the housing integrally-injected molded copper bar (31) being welded to the module DC copper bar terminal (11) that has been bent of the power module (1), the housing integrally-injected molded copper bar (31) being welded to the module AC copper bar terminal (12) that has been bent of the power module (1), and a capacitor potting area (32) being provided on the housing (3); The housing (3) is provided with a cooling water channel (33), the cooling water channel (33) is parallel to the power module (1), the cooling water channel (33) is provided with a cooling water channel inlet (34), and the cooling water channel (33) is provided with a cooling water channel outlet (35).

2. The inverter brick power module according to claim 1, characterized in that: A cooling water channel inlet (34) and a cooling water channel outlet (35) on the cooling water channel (33) are parallel to the power module (1).

3. The inverter brick power module according to claim 1, characterized in that: The power module (1) is perpendicular to the PCB board (4) and is welded to the PCB board (4) via module PIN pins (13).

4. A heat dissipation module for an inverter brick power module, used for the inverter brick power module described in any one of claims 1 to 3, characterized in that: It comprises a heat dissipation housing (5), on which a blower mechanism (51) is provided; The hair dryer mechanism (51) comprises a mounting groove (5101) and a first motor (5102); the first motor (5102) is fixedly connected inside the mounting groove (5101); the mounting groove (5101) is provided on the heat dissipation housing (5); and a fan blade (5103) is fixedly connected to the output end of the first motor (5102); The heat dissipation shell (5) is provided with a through opening (5104), the heat dissipation shell (5) is fixedly connected with an air outlet duct (5105), and the interior of the air outlet duct (5105) is fixedly connected with a guide plate (5106).

5. The heat dissipation module of the inverter brick power module according to claim 4, characterized in that: A magnetic attraction ring (5107) is fixedly connected to the interior of the installation groove (5101), a magnetic attraction filter plate (5108) is magnetically attracted to the magnetic attraction ring (5107), and an air outlet (5109) is provided on the air outlet duct (5105).

6. The heat dissipation module for the inverter brick power module according to claim 5, characterized in that: The air outlet duct (5105) is provided with a flow guiding mechanism (52), the flow guiding mechanism (52) comprising an adjusting plate (5201) and a fixing plate (5202), the adjusting plate (5201) being arranged inside the air outlet duct (5105), and the fixing plate (5202) being fixedly connected to the heat dissipation housing (5).

7. The heat dissipation module for the inverter brick power module according to claim 6, characterized in that: The air outlet duct (5105) is provided with a movable opening (5210), the interior of the movable opening (5210) is slidably connected to a tooth plate (5207), and the fixed plate (5202) is fixedly connected to a second motor (5208).

8. The heat dissipation module for the inverter brick power module according to claim 7, characterized in that: A half gear (5209) is fixedly connected to the output end of the second motor (5208), and the half gear (5209) is meshed with the tooth plate (5207). A guide seat (5211) is fixedly connected to the air outlet duct (5105), and a guide rod (5212) is slidably connected inside the guide seat (5211), and one end of the guide rod (5212) is fixedly connected to the tooth plate (5207).

9. The heat dissipation module for the inverter brick power module according to claim 8, characterized in that: A spring (5213) is sleeved on the guide rod (5212), one end of the spring (5213) abuts against the tooth plate (5207), and the other end of the spring (5213) abuts against the guide seat (5211).

10. The heat dissipation module for the inverter brick power module according to claim 9, characterized in that: A positioning rod (5204) is fixedly connected to the interior of the air outlet duct (5105); a guide plate (5205) is hingedly connected to the adjustment plate (5201) via a pin shaft (5203); a guide hole (5206) is provided on the guide plate (5205); and the positioning rod (5204) is inserted into the interior of the guide hole (5206).

Images