PDU cooling device and vehicle

Abstract

The utility model belongs to the technical field of power battery PDU thermal management, and discloses a PDU cooling device and a vehicle. The device comprises a box body, fan blades, a magnetic coupler and a driver, the box body is communicated with the PDU assembly, the fan blades are arranged on the inner side of the box body, the driver is arranged on the outer side of the box body and connected to the fan blades, and the magnetic coupler is connected to the driver and used for acting on the driver in a magnetic force mode to drive the fan blades to rotate. According to the PDU cooling device, the driver and the wall plate of the fan blade spacing box body are in driving connection through the magnetic coupler, hole structures can be prevented from being arranged on the wall plate of the box body, and damage to the sealing performance of the box body is reduced, so that the PDU assembly can be cooled, water, dust and other foreign matters cannot enter the PDU assembly through the PDU cooling device, and the service life of the PDU assembly is prolonged. The safety and the reliability of parts in the PDU assembly are guaranteed, and the service life, the endurance and the reliability of a vehicle can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery PDU heat management technical field especially relates to a kind of PDU cooling device and vehicle. BACKGROUND

[0002] With the rapid development of electric vehicle industry, the safety of power battery has become the core problem that is universally concerned inside and outside the industry. In this key field of commercial vehicle, PDU (Power Distribution Unit) plays a vital role, it is not only the bridge connecting each sub-battery pack and vehicle system, but also bears the heavy responsibility of current distribution and management, to ensure the efficient and stable transmission of power. However, due to the need to carry large current in the working process of PDU, affected by contact resistance, a large amount of heat will inevitably be generated. If this heat accumulation is not handled in time, it may have a serious impact on the performance and life of PDU, and even threaten the safe operation of the whole vehicle. Therefore, in order to ensure the safety and reliability of PDU and the whole power battery system, it is particularly important to take external cooling measures to cool it effectively.

[0003] However, the existing cooling device will also damage the sealing of PDU itself while cooling, which will accelerate the aging of key electrical components inside PDU in high temperature and humidity conditions, and thus reduce the safety and reliability of PDU.

[0004] Therefore, there is an urgent need for a PDU cooling device and vehicle to solve the above technical problems. SUMMARY

[0005] The purpose of the utility model is to provide a kind of PDU cooling device and vehicle, which can effectively cool PDU in time and ensure the sealing of PDU itself.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The PDU cooling device is used to drive the circulation of cooling medium and cool the PDU assembly, and

[0008] The PDU cooling device includes a box, a fan blade, a magnetic coupler and a driver, the fan blade is arranged inside the box, the driver is arranged outside the box and connected to the fan blade, and the magnetic coupler is connected to the driver to act on the driver by magnetic force and drive the fan blade to rotate.

[0009] As preferred, the magnetic coupling comprises a first rotor and a second rotor, the first rotor is connected with the driver outside the box, the second rotor is connected with the fan inside the box, and the first rotor and the second rotor are connected by magnetic transmission.

[0010] As preferred, the box is provided with an inlet and an outlet, the inlet and the outlet are respectively connected with the PDU assembly to provide cooling medium.

[0011] As preferred, the cross-sectional area of the inlet is larger than that of the outlet along the flow direction of the cooling medium.

[0012] As preferred, one side wall of the box is provided with a first part, the inlet is arranged on the first part, the other side wall of the box is provided with a second part, the outlet is arranged on the second part, and the cross-sectional area of the first part is larger than that of the second part along the flow direction of the cooling medium.

[0013] As preferred, the PDU cooling device further comprises a cooling pipe, the cooling pipe is arranged in the box, and the cooling pipe is used to transfer heat in the box to the outside of the box.

[0014] As preferred, the PDU cooling device comprises a cooling fin, the cooling fin is arranged outside the box and is in thermal connection with the box.

[0015] As preferred, the PDU cooling device comprises a cooling pipe and a cooling fin, the cooling pipe is arranged in the box, and the cooling fin is arranged outside the box and is in thermal connection with the cooling fin, the cooling pipe and the cooling fin are used to transfer heat in the box to the outside of the box.

[0016] As preferred, the cooling pipe is connected with a condenser and a compressor, and a refrigerant is arranged to flow between the compressor, the condenser and the cooling pipe, the compressor is used to drive the refrigerant to circulate, the refrigerant releases heat at the condenser and absorbs heat at the cooling pipe.

[0017] A vehicle, characterized in comprising a PDU assembly, a first pipe, a second pipe and the PDU cooling device, the PDU cooling device is used to provide cooling medium to the PDU assembly through the first pipe and the second pipe to dissipate heat.

[0018] The utility model discloses a beneficial effect: drive and fan leaf interval box's wallboard drive connection through magnetic coupler, can avoid setting the hole structure for transmission shaft to wear on the wallboard of box, reduced the sealed destruction of box, also avoided setting more sealing element, thereby not only can the cooling of PDU assembly, also can not cause moisture, dust and other foreign matters through PDU cooling device enter to PDU assembly, guarantee the safety and reliability of PDU assembly in spare part, and simplify the structure, reduce the weight, be favorable to improve the service life, the endurance and reliability of vehicle, reduce the possibility of PDU assembly failure. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the assembly drawing of PDU cooling device and PDU assembly provided in the first embodiment;

[0020] Figure 2 It is the first perspective view of PDU cooling device provided in the first embodiment;

[0021] Figure 3 It is the second perspective view of PDU cooling device provided in the first embodiment;

[0022] Figure 4 It is the internal structure perspective view of PDU cooling device provided in the first embodiment;

[0023] Figure 5 It is the internal structure plan view of PDU cooling device provided in the second embodiment;

[0024] Figure 6 It is the internal structure perspective view of PDU cooling device provided in the second embodiment.

[0025] In the drawing:

[0026] 1, PDU assembly;

[0027] 2, PDU cooling device;

[0028] 21, box; 211, first part; 2111, import; 212, second part; 2121, export;

[0029] 221, cooling cannula; 222, cooling fin; 223, first connecting plate; 224, second connecting plate;

[0030] 23, fan leaf; 24, magnetic coupler; 25, drive; 26, first pipeline; 27, second pipeline. DETAILED DESCRIPTION

[0031] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model and not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.

[0032] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed", "abutted" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] In the description of the embodiment, the terms "up", "down", "right", "left" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation of the utility model. In addition, the terms "first" and "second" are only used to distinguish in description and have no special meaning.

[0035] The following will be described in detail according to the drawings Figure 1 to the drawings Figure 6 The PDU cooling device 2 and the vehicle provided by the utility model are introduced in two embodiments respectively.

[0036] Embodiment 1:

[0037] As Figures 1 to 4As shown in the first embodiment of the utility model, the PDU cooling device 2 and the PDU assembly 1 are communicated, and a cooling medium is circulated and flows between the PDU cooling device 2 and the PDU assembly 1. The cooling medium can absorb heat when flowing through the PDU assembly 1 and release heat when flowing through the PDU cooling device 2, thereby transferring the heat generated during the operation of the PDU assembly 1 to the PDU cooling device 2. It should be noted that in the utility model, the cooling medium can be a liquid coolant or gaseous air, as long as it can achieve the effect of heat transfer, it belongs to the scope of the utility model.

[0038] As shown in the first embodiment of the utility model, the PDU cooling device 2 and the PDU assembly 1 are communicated, and a cooling medium is circulated and flows between the PDU cooling device 2 and the PDU assembly 1. The cooling medium can absorb heat when flowing through the PDU assembly 1 and release heat when flowing through the PDU cooling device 2, thereby transferring the heat generated during the operation of the PDU assembly 1 to the PDU cooling device 2. It should be noted that in the utility model, the cooling medium can be a liquid coolant or gaseous air, as long as it can achieve the effect of heat transfer, it belongs to the scope of the utility model. Figure 1 、 Figure 2 As shown in the first embodiment of the utility model, the PDU cooling device 2 and the PDU assembly 1 are communicated, and a cooling medium is circulated and flows between the PDU cooling device 2 and the PDU assembly 1. The cooling medium can absorb heat when flowing through the PDU assembly 1 and release heat when flowing through the PDU cooling device 2, thereby transferring the heat generated during the operation of the PDU assembly 1 to the PDU cooling device 2. It should be noted that in the utility model, the cooling medium can be a liquid coolant or gaseous air, as long as it can achieve the effect of heat transfer, it belongs to the scope of the utility model.

[0039] The fan blade 23 is rotatably arranged in the box body 21 and can drive the cooling medium to flow, thereby achieving heat transfer between the PDU assembly 1 and the PDU cooling device 2. The driver 25 is arranged outside the box body 21, which is convenient for replacement and maintenance. The magnetic coupler 24 is drivingly connected between the driver 25 and the fan blade 23, and the power of the driver 25 is transmitted to the fan blade 23 through the wall plate of the box body 21 by magnetic force.

[0040] In the PDU cooling device 2, the driver 25 and the fan blade 23 are drivingly connected through the magnetic coupler 24 and the wall plate of the box body 21, which can avoid setting a hole structure for the transmission shaft on the wall plate of the box body 21, reduce the damage to the sealing property of the box body 21, and avoid setting more sealing members, thereby not only cooling the PDU assembly 1, but also not causing other foreign matters such as water and dust to enter the PDU assembly 1 through the PDU cooling device 2, ensuring the safety and reliability of the components in the PDU assembly 1, simplifying the structure and reducing the weight, and being conducive to improving the service life, endurance and reliability of the vehicle, and reducing the possibility of PDU assembly 1 failure.

[0041] Specifically, the magnetic coupling 24 comprises a first part and a second part which are separately arranged on two sides of the wall plate of the box 21, the first part comprises a first rotor which is drivingly connected with the driver 25, and the second part comprises a second rotor which is drivingly connected with the fan blade 23, and the first rotor and the second rotor are drivingly connected through the wall plate by magnetic force.

[0042] As shown in Figure 2 , Figure 3 , in the embodiment, the cross-sectional area of the inlet 2111 is greater than that of the outlet 2121 along the flow direction of the cooling medium. Such an arrangement can form a Venturi effect, thereby increasing the flow rate of the cooling medium in the box 21 and accelerating heat transfer.

[0043] Further, as shown in Figure 2 , Figure 3 , one side wall plate of the box 21 is provided with a first part 211, and the inlet 2111 is arranged on the first part 211; the other side wall plate of the box 21 is provided with a second part 212, and the outlet 2121 is arranged on the second part 212; and the cross-sectional area of the first part 211 is greater than that of the second part 212 along the flow direction of the cooling medium. Compared with forming a Venturi effect only by the difference between the cross-sectional areas of the inlet 2111 and the outlet 2121, the difference between the cross-sectional areas of the first part 211 and the second part 212 can further form a stronger Venturi effect, and further increase the flow rate of the cooling medium, thereby further accelerating heat transfer.

[0044] As shown in Figure 4 , the PDU cooling device further comprises a cooling member which is thermally connected to the box 21 and can release heat in the box 21 to the outside of the box 21, thereby ensuring that the cooling medium can continuously transfer heat to the box 21. The cooling member comprises a cooling plug 221 which is arranged in the box 21 and is used to transfer heat in the box 21 to the outside of the box 21. The cooling plug 221 comprises a hollow copper pipe, and the inside of the hollow copper pipe is provided with a capillary structure and a phase change medium. Part of the cooling plug 221 is located in the box 21, and the other part is located outside the box 21. The phase change medium located in the box 21 can absorb heat and change from a liquid state to a gaseous state, and then flow to the part of the hollow copper pipe located outside the box 21, and then release heat and change to a liquid state. The phase change medium in the liquid state flows to the part of the hollow copper pipe located in the box 21 under the action of the capillary structure, and can reabsorb heat and change phase. In this way, the heat in the box 21 can be recycled and efficiently released to the outside of the box 21, ensuring that the cooling medium releases heat when flowing through the box 21, thereby achieving cooling and temperature reduction of the PDU assembly 1.

[0045] Of course, in some embodiments, only metal pipes such as copper pipes and aluminum pipes can be used to achieve the effect of transferring heat from the cooling medium inside the box 21 to the outside of the box 21, which is also within the scope of protection of this utility model. Therefore, the specific structure of the cooling pipe 221 is not limited in this utility model.

[0046] Furthermore, the cooling component includes multiple cooling pipes 221 arranged in an array to improve the efficiency of heat transfer from inside the housing 21 to outside the housing 21. A passage gap is formed between two adjacent cooling pipes 221 to allow the cooling medium to flow through, thereby reducing the flow resistance of the cooling medium.

[0047] Preferably, such as Figure 4 As shown, the cooling pipe 221 is thermally connected to a connecting plate, and the connecting plate is provided with multiple cooling fins 222. Both the connecting plate and the cooling fins 222 are located outside the housing 21. The heat carried by the cooling medium can be released into the air through the cooling pipe 221, the connecting plate, and the cooling fins 222. The cooling fins 222 have a large contact area with the air, thereby improving the efficiency of heat transfer to the air. Preferably, the air used is the relatively cool air drawn in during vehicle movement, and as the vehicle moves, the air that has heated up due to absorbing heat from the PDU assembly 1 is also discharged from the vehicle, thereby maintaining efficient cooling of the PDU assembly 1.

[0048] Of course, in some other embodiments, heat can be dissipated directly through the outer surface of the housing 21, or only the cooling fins 222 can be disposed on the outer surface of the housing 21 for heat dissipation, or only the cooling pipes 221 can be inserted into the housing 21 for heat dissipation. These are all within the scope of protection of this utility model.

[0049] like Figure 5 , Figure 6 As shown, the present invention also provides a second embodiment, which, compared with the above embodiment, has the same structure as the housing 21, fan blade 23, magnetic coupler 24 and driver 25, and can also be connected to the PDU assembly 1 and cooled down.

[0050] Example 2:

[0051] Different from the first embodiment, in the present embodiment, the cooling member comprises cooling tubes 221 which are different from the above structure, and the cooling tubes 221 are further connected with a first connecting plate 223 and a second connecting plate 224. Specifically, the cooling tubes 221 adopt hollow tube members, and the first connecting plate 223 and the second connecting plate 224 adopt hollow plate members. A plurality of hollow tube members are arranged through the whole box 21, and both ends of the hollow tube members are located outside the box 21. One end of each hollow tube member is communicated with the first connecting plate 223, and the other end is communicated with the second connecting plate 224. The first connecting plate 223, the cooling tubes 221 and the second connecting plate 224 are provided with refrigerant flowing therein, and the first connecting plate 223 is communicated with a condenser and a compressor. Under the driving of the compressor, the refrigerant can circulate and flow between the condenser, the compressor, the first connecting plate 223, the cooling tubes 221 and the second connecting plate 224. Moreover, the refrigerant is changed from liquid to gas when flowing through the cooling tubes 221, absorbs heat in the box 21, is changed from gas to high-temperature liquid when flowing through the compressor, and can release heat and change to low-temperature liquid when flowing through the condenser, so that the refrigerant can absorb heat again from the low-temperature liquid and change to gas when circulating and flowing to the cooling tubes 221 next time.

[0052] The utility model discloses still provide a kind of vehicle, PDU assembly 1 and the PDU cooling device 2 of above are provided in the vehicle, cooling medium is arranged in circulation in PDU cooling device 2 and PDU assembly 1, cooling medium can transfer the heat of PDU assembly 1 to PDU cooling device 2 and release.And, driver 25 and fan blade 23 are driven to connect the wallboard of box 21 by magnetic coupler 24, can avoid the hole structure for transmission shaft to be set on the wallboard of box 21, reduce the damage to the sealing property of box 21, also avoid setting more sealing element, so as to not only can cool PDU assembly 1, also can not cause moisture, dust and other foreign matters to enter into PDU assembly 1 by PDU cooling device 2, guarantee the safety and reliability of component in PDU assembly 1, and simplify structure, reduce weight, be favorable to improve the service life, endurance and reliability of vehicle, reduce the possibility of PDU assembly 1 failure.

[0053] Obviously, the above embodiments of the utility model are only for clear illustration of the utility model, and not the limitation of the implementation mode of the utility model. For ordinary skilled person in the art, various obvious changes, re-adjustment and replacement can be carried out without departing from the protection scope of the utility model. Here, all implementation modes cannot be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. PDU cooling device, characterized in that The PDU cooling device (2) is used for driving the circulation of cooling medium and cooling the PDU assembly (1), and The PDU cooling device (2) comprises a box (21), a fan blade (23), a magnetic coupler (24) and a driver (25), the fan blade (23) is arranged inside the box (21), the driver (25) is arranged outside the box (21) and connected to the fan blade (23), and the magnetic coupler (24) is connected to the driver (25) and used for acting on the driver (25) by magnetic force to drive the fan blade (23) to rotate.

2. The PDU cooling apparatus of claim 1, wherein, The magnetic coupler (24) comprises a first rotor and a second rotor, the first rotor is connected to the driver (25) outside the box (21), the second rotor is connected to the fan blade (23) inside the box (21), and the first rotor and the second rotor are connected by magnetic force transmission.

3. The PDU cooling device according to claim 1, wherein The box (21) is provided with an inlet (2111) and an outlet (2121), and the inlet (2111) and the outlet (2121) are respectively used for communicating with the PDU assembly (1) to provide cooling medium.

4. The PDU cooling device according to claim 3, wherein Along the flow direction of the cooling medium, the cross-sectional area of the inlet (2111) is greater than that of the outlet (2121).

5. The PDU cooling device according to claim 3, wherein One side wall plate of the box (21) is provided with a first part (211), the inlet (2111) is arranged in the first part (211), the other side wall plate of the box (21) is provided with a second part (212), the outlet (2121) is arranged in the second part (212), and along the flow direction of the cooling medium, the cross-sectional area of the first part (211) is greater than that of the second part (212).

6. The PDU cooling device according to claim 1, wherein The PDU cooling device (2) further comprises a cooling plug pipe (221), the cooling plug pipe (221) is arranged in the box (21), and the cooling plug pipe (221) is used for transferring heat in the box (21) to the outside of the box (21).

7. The PDU cooling device according to claim 1, wherein The PDU cooling device (2) comprises cooling fins (222), the cooling fins (222) are arranged outside the box (21) and are in heat conduction connection with the box (21).

8. The PDU cooling device according to claim 1, wherein The PDU cooling device (2) comprises a cooling plug pipe (221) and a cooling fin (222), the cooling plug pipe (221) is arranged in the box (21), the cooling fin (222) is arranged outside the box (21) and is in heat conduction connection with the cooling fin (222), and the cooling plug pipe (221) and the cooling fin (222) are used to transfer heat in the box (21) to the outside of the box (21).

9. The PDU cooling device according to any one of claims 6 or 8, characterized in that, The cooling plug pipe (221) is communicated with a condenser and a compressor, and a refrigerant is arranged to flow between the compressor, the condenser and the cooling plug pipe (221), the compressor is used to drive the refrigerant to circulate, the refrigerant releases heat at the condenser and absorbs heat at the cooling plug pipe (221).

10. Vehicle, characterized in that The PDU cooling device (2) is used to provide a cooling medium to the PDU assembly (1) through the first pipe (26) and the second pipe (27) to dissipate heat.

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