BDU liquid cooling structure, battery pack, electric equipment and vehicle

Abstract

The utility model relates to a BDU liquid cooling structure, a battery pack, electric equipment and a vehicle, the BDU liquid cooling structure comprises a liquid cooling shell, the liquid cooling shell is used for being in heat conduction contact with a BDU, a liquid flow cavity for a cooling liquid to circulate is formed in the liquid cooling shell, the inner wall of the liquid cooling shell is provided with turbulent flow ribs, the turbulent flow ribs extend along a first direction, and the turbulent flow ribs extend along a second direction. The first direction intersects with the circulation direction of the cooling liquid. Through the technical scheme, the BDU liquid cooling structure provided by the utility model can improve the heat exchange effect between the cooling liquid and the liquid cooling plate.

Description

Technical Field

[0001] The present disclosure relates to the technical field of batteries, and in particular, to a BDU liquid cooling structure, a battery pack, an electrical device, and a vehicle. Background Art

[0002] The Battery Disconnect Unit (BDU), also called the BDU, is designed specifically for the inside of the battery pack and belongs to a type of distribution box. The main heating components and copper bars therein usually have relatively high heat dissipation requirements.

[0003] Currently, in the related art, in order to dissipate heat from the BDU, a liquid cooling plate is set up to take away the heat generated by the main heating components and copper bars in the BDU during operation, so as to ensure that the normal temperature rise can be maintained inside the BDU. However, the structural design of these liquid cooling plates is often relatively simple, resulting in poor heat exchange effect between the coolant and the liquid cooling plate, affecting the heat dissipation effect of the BDU. Summary of the Utility Model

[0004] The purpose of the present disclosure is to provide a BDU liquid cooling structure, a battery pack, an electrical device, and a vehicle. The BDU liquid cooling structure can improve the heat exchange effect between the coolant and the liquid cooling plate.

[0005] To achieve the above purpose, the present disclosure provides a BDU liquid cooling structure, including: a liquid cooling housing; a liquid flow cavity for the coolant to flow through is formed inside the liquid cooling housing, and a turbulator rib is provided on the inner wall of the liquid cooling housing. The turbulator rib extends along a first direction, and the first direction intersects with the flow direction of the coolant.

[0006] Optionally, the liquid cooling housing includes a liquid cooling plate and a liquid cooling cover plate. The liquid cooling plate and the liquid cooling cover plate are arranged opposite to each other and connected to each other. The liquid flow cavity is formed between the liquid cooling plate and the liquid cooling cover plate, and at least one of the liquid cooling plate and the liquid cooling cover plate is provided with the turbulator rib.

[0007] Optionally, the liquid cooling plate and the liquid cooling cover plate are respectively provided with a plurality of the turbulator ribs arranged at intervals. The turbulator ribs on the liquid cooling plate and the turbulator ribs on the liquid cooling cover plate are arranged alternately along a second direction, so that a narrowed flow channel is formed between the turbulator rib and the opposite liquid cooling plate or the liquid cooling cover plate. Wherein, the second direction intersects with the first direction.

[0008] Optionally, the liquid cooling plate is provided with a sunk groove, the sunk groove protrudes from the outer surface of the liquid cooling plate towards the liquid flow cavity, and at least part of the turbulator ribs on the liquid cooling cover plate are formed with avoidance notches for avoiding the sunk groove.

[0009] Optionally, the liquid cooling plate is connected with a liquid inlet pipe and a liquid outlet pipe. The liquid inlet pipe and the liquid outlet pipe are respectively communicated with the liquid flow cavity. The sink is arranged between the liquid inlet pipe and the liquid outlet pipe. The liquid cooling plate is further provided with a first flow guiding rib which is connected to the sink and extends towards the liquid inlet pipe. The first flow guiding rib is used for guiding the cooling liquid flowing into the liquid flow cavity from the liquid inlet pipe to both sides of the sink.

[0010] Optionally, the first flow guiding rib is configured as an arc, and the position of the first flow guiding rib corresponding to the sink is bent towards the liquid inlet pipe.

[0011] Optionally, the liquid flow cavity includes a first liquid flow cavity and a second liquid flow cavity which are communicated with each other. Moreover, the second liquid flow cavity is closer to the liquid inlet pipe than the first liquid flow cavity, and the size of the first liquid flow cavity in the first direction is larger than the size of the second liquid flow cavity in the first direction.

[0012] Optionally, the liquid flow cavity further includes a transition cavity which communicates the first liquid flow cavity and the second liquid flow cavity.

[0013] Optionally, the liquid cooling plate is provided with a second flow guiding rib which is arranged between the sink and the liquid outlet pipe. The second flow guiding rib is used for guiding the cooling liquid flowing out from both sides of the sink to the liquid outlet pipe.

[0014] Optionally, there are multiple second flow guiding ribs, and at least one of the multiple second flow guiding ribs is flush with the end of the first flow guiding rib close to the sink in the first direction.

[0015] Optionally, a first boss and a second boss are formed on the liquid cooling plate. The first boss and the second boss are respectively formed with a first cavity and a second cavity. The liquid inlet pipe and the liquid outlet pipe are respectively communicated with the liquid flow cavity through the first cavity and the second cavity.

[0016] Optionally, the liquid cooling plate is formed with a convex edge, and the liquid cooling cover plate is formed with a mounting groove. The convex edge is embedded in the mounting groove and connected to the mounting groove.

[0017] Optionally, the convex edge has a first curved section. The two sides of the sink respectively correspond to the first curved section, and at least part of the two first curved sections is concave towards the sink. The mounting groove has a second curved section which corresponds to the first curved section.

[0018] Optionally, there is an arc transition between the flow disturbing rib and the inner wall of the liquid cooling housing.

[0019] Optionally, the BDU liquid cooling structure includes a heat conducting member for fitting with the liquid cooling housing and the BDU.

[0020] Optionally, the liquid cooling housing includes a liquid cooling plate provided with a sunken groove protruding from the outer surface of the liquid cooling plate toward the liquid flow chamber. The heat conducting member fits on the liquid cooling plate and includes a first part and a second part spaced from each other and located on both sides of the sunken groove respectively.

[0021] Optionally, the BDU liquid cooling structure further includes an insulating film disposed between the liquid cooling housing and the heat conducting member.

[0022] Based on the above technical solution, the present disclosure further provides a battery pack, which includes a BDU and the above BDU liquid cooling structure, and the BDU is in thermal contact with the liquid cooling housing.

[0023] Optionally, the BDU includes a copper busbar and electrical components. The copper busbar is electrically connected to the electrical components, and the contact point between the copper busbar and the electrical components is for fitting with the liquid cooling housing.

[0024] Based on the above technical solution, the present disclosure further provides an electrical device, which includes the above battery pack.

[0025] Based on the above technical solution, the present disclosure further provides a vehicle, which includes the above battery pack.

[0026] Through the above technical solution, in the BDU liquid cooling structure provided by the present disclosure, by providing spoiler ribs on the inner wall of the liquid cooling housing and making the spoiler ribs extend in a first direction intersecting the flow direction of the coolant, the cross-section of the flow channel inside the liquid flow chamber is reduced. In this way, when the coolant passes through these flow channels, not only will the flow velocity increase, but the traveling direction will also change. As a result, the stable convection layer formed between the viscosity of the coolant itself and the rough surface of the inner wall of the liquid cooling housing can be disrupted, so as to improve the heat exchange effect between the coolant and the cooling housing, and thus improve the heat exchange effect between the liquid cooling housing and the BDU.

[0027] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. They are used to explain the present disclosure together with the following specific implementation, but do not constitute a limitation to the present disclosure. In the drawings:

[0029] Figure 1It is a schematic diagram of the assembly structure of the BDU liquid cooling structure and the BDU of the present disclosure;

[0030] Figure 2 It is an exploded structure diagram of the BDU liquid cooling structure and the BDU of the present disclosure;

[0031] Figure 3 Is Figure 2 The partial enlarged view of part A in

[0032] Figure 4 It is a schematic diagram of the structure of the liquid cooling plate provided by the exemplary embodiment of the present disclosure;

[0033] Figure 5 It is another schematic diagram of the structure of the liquid cooling plate provided by the exemplary embodiment of the present disclosure;

[0034] Figure 6 It is a schematic diagram of the structure of the liquid cooling cover plate provided by the exemplary embodiment of the present disclosure;

[0035] Figure 7 It is a schematic cross-sectional structure diagram of the liquid cooling plate and the liquid cooling cover plate provided by the exemplary embodiment of the present disclosure;

[0036] Figure 8 Is Figure 7 The partial enlarged view of part B in

[0037] Explanation of reference numerals

[0038] 1 - Heat conducting member; 11 - First part; 12 - Second part; 2 - Liquid cooling housing; 21 - Liquid cooling plate; 211 - Sunk groove; 212 - Liquid inlet pipe; 213 - Liquid outlet pipe; 214 - First boss; 214a - First cavity; 215 - Second boss; 215a - Second cavity; 216 - Flange; 216a - First curved section; 22 - Liquid cooling cover plate; 221 - Mounting groove; 221a - Second curved section; 3 - Turbulence ribs; 31 - Avoidance notch; 4 - Narrowed flow channel; 5 - Liquid flow cavity; 51 - First liquid flow cavity; 52 - Second liquid flow cavity; 53 - Transition cavity; 6 - First guiding rib; 7 - Second guiding rib; 8 - Insulating film; 9 - BDU; 91 - Copper bus bar. Detailed description of the specific implementation

[0039] The following will describe in detail the specific implementation of the present disclosure with reference to the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0040] In the present disclosure, unless otherwise stated, the orientation terms such as "inside" and "outside" refer to "inside" and "outside" relative to the contour of the corresponding component itself. In addition, the terms "first", "second", etc. used in the present disclosure are used to distinguish one element from another, and do not have sequentiality and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be construed as a limitation of the present disclosure.

[0041] The present disclosure provides a BDU liquid cooling structure. As shown in Figures 1 to 8 the BDU liquid cooling structure includes a liquid cooling housing 2, the liquid cooling housing 2 is used for thermally contacting with the BDU 9, a liquid flow cavity 5 for the coolant to flow through is formed inside the liquid cooling housing 2, and a flow disturbing rib 3 is provided on the inner wall of the liquid cooling housing 2, the flow disturbing rib 3 extends along a first direction, and the first direction intersects with the flow direction of the coolant.

[0042] Through the above technical solution, in the BDU liquid cooling structure provided by the present disclosure, by providing the flow disturbing rib 3 on the inner wall of the liquid cooling housing 2 and making the flow disturbing rib 3 extend along the first direction intersecting with the flow direction of the coolant, the cross-section of the flow channel inside the liquid flow cavity 5 is reduced. In this way, when the coolant passes through these flow channels, not only will the flow velocity increase, but also the traveling direction will change. Thereby, the stable convection layer formed between the viscous force of the coolant itself and the rough surface of the inner wall of the liquid cooling housing 2 can be destroyed to improve the heat exchange effect between the coolant and the cooling housing, and thus improve the heat exchange effect between the liquid cooling housing 2 and the BDU 9.

[0043] It should be noted that in the present disclosure, "the first direction intersects with the flow direction of the coolant" can be that the first direction is perpendicular to the flow direction of the coolant, or the first direction intersects with the flow direction of the coolant at any other appropriate included angle. The present disclosure does not limit this, and it can be flexibly selected according to the actual situation. And "the second direction intersects with the first direction" can be that the second direction is perpendicular to the first direction, or the second direction intersects with the first direction at any other appropriate included angle. The present disclosure does not limit this, and it can be flexibly selected according to the actual situation. Among them, when "the first direction intersects with the flow direction of the coolant" and "the second direction intersects with the first direction", the second direction can be the same as or different from the flow direction of the coolant, and it specifically needs to be flexibly selected according to the actual situation. The present disclosure does not limit this.

[0044] It should also be noted that in the above embodiments, the flow channel refers to the channel in the liquid cooling housing 2 through which the coolant passes. When the liquid cooling housing 2 is provided with turbulator ribs 3 inside, the flow channel formed between the liquid cooling housing 2 and the turbulator ribs 3 can also be called a narrowed flow channel 4. Exemplarily, when the liquid cooling housing 2 includes a liquid cooling plate 21 and a liquid cooling cover plate 22, and turbulator ribs 3 are respectively provided on the liquid cooling plate 21 and the liquid cooling cover plate 22, the flow channels between the liquid cooling plate 21 and the turbulator ribs 3 and between the liquid cooling cover plate 22 and the turbulator ribs 3 can both be called narrowed flow channels 4. Among them, the relevant content about the liquid cooling plate 21, the turbulator ribs 3 and the narrowed flow channel 4 will be described in detail below.

[0045] In the exemplary embodiments provided by the present disclosure, as shown in Figure 2 , Figure 7 and Figure 8 , the liquid cooling housing 2 may include a liquid cooling plate 21 and a liquid cooling cover plate 22. The liquid cooling plate 21 and the liquid cooling cover plate 22 are arranged oppositely and connected to each other. A liquid flow cavity 5 is formed between the liquid cooling plate 21 and the liquid cooling cover plate 22, and at least one of the liquid cooling plate 21 and the liquid cooling cover plate 22 is provided with turbulator ribs 3. In this way, the cross-section of the flow channel inside the liquid flow cavity 5 can be reduced, so that when the coolant passes through these flow channels inside the liquid flow cavity 5, the flow velocity can be increased and the traveling direction can be changed, thereby destroying the stable convection layer formed between the viscosity of the coolant itself and the rough surface of the inner wall of the liquid cooling housing 2 to improve the heat exchange effect between the coolant and the cooling housing. Among them, the turbulator ribs 3 can be provided only on the liquid cooling plate 21 or the liquid cooling cover plate 22, or can be provided on both at the same time. The present disclosure does not limit this, and can be flexibly selected according to the actual situation. In addition, in order to improve the heat exchange efficiency between the liquid cooling plate 21 and the coolant, an aluminum alloy with a high thermal conductivity can be used to make the liquid cooling plate 21.

[0046] In the exemplary embodiments provided by the present disclosure, as shown in Figure 2 , Figure 7 and Figure 8As shown, the liquid cooling plate 21 and the liquid cooling cover plate 22 can be respectively provided with a plurality of turbulator ribs 3 arranged at intervals. The turbulator ribs 3 on the liquid cooling plate 21 and the turbulator ribs 3 on the liquid cooling cover plate 22 are arranged alternately in the second direction, so as to form a narrowed flow channel 4 between the turbulator ribs 3 and the opposite liquid cooling plate 21 or liquid cooling cover plate 22. Wherein, the second direction intersects with the first direction. Through such a setting, on the one hand, the interference frequency of the turbulator ribs 3 on the coolant can be increased by increasing the number of the turbulator ribs 3 to improve the heat exchange effect. On the other hand, the way that the turbulator ribs 3 on the liquid cooling plate 21 and the turbulator ribs 3 on the liquid cooling cover plate 22 are arranged alternately can also cause the traveling direction of the coolant to change continuously, thereby further improving the heat exchange effect. Specifically, when the turbulator ribs 3 on the liquid cooling plate 21 and the turbulator ribs 3 on the liquid cooling cover plate 22 are arranged alternately in the second direction, and the narrowed flow channels 4 formed between the turbulator ribs 3 and the opposite liquid cooling plate 21 and the narrowed flow channels 4 formed between the turbulator ribs 3 and the opposite liquid flow cover plate are also arranged alternately, in this way, the traveling direction of the coolant can be caused to change continuously, and thus the heat exchange effect between the coolant and the liquid cooling housing 2 is improved.

[0047] In the exemplary embodiment provided by the present disclosure, referring to Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, in order to avoid the relay baffle (not shown in the figure) in the BDU9, a sunk groove 211 can be provided on the liquid cooling plate 21. The sunk groove 211 protrudes from the outer surface of the liquid cooling plate 21 towards the liquid flow cavity 5. At least part of the turbulator ribs 3 on the liquid cooling cover plate 22 are formed with avoidance notches 31 for avoiding the sunk groove 211. In this way, when assembling the BDU9 and the BDU liquid cooling structure, the sunk groove 211 on the liquid cooling plate 21 can be used to install the relay baffle, so that the relay (not shown in the figure) and the heat generating component (not shown in the figure) in the BDU9 can be inversely attached to the liquid cooling plate 21, and have a large enough contact area with the liquid cooling plate 21, so as to ensure that the liquid cooling plate 21 can dissipate heat well for the relay and the heat generating component in the BDU9.

[0048] In the exemplary embodiment provided by the present disclosure, referring to Figure 2 , Figure 4 and Figure 5As shown in the figure, in order to enable the coolant inside the liquid flow cavity 5 to circulate continuously with the external coolant, a liquid cooling plate 21 can be provided with a liquid inlet pipe 212 and a liquid outlet pipe 213. The liquid inlet pipe 212 and the liquid outlet pipe 213 are respectively communicated with the liquid flow cavity 5. The sunken groove 211 is arranged between the liquid inlet pipe 212 and the liquid outlet pipe 213. The liquid cooling plate 21 is also provided with a first flow guiding rib 6. The first flow guiding rib 6 is connected to the sunken groove 211 and extends towards the liquid inlet pipe 212. The first flow guiding rib 6 is used to guide the coolant flowing into the liquid flow cavity 5 from the liquid inlet pipe 212 to both sides of the sunken groove 211. Through such a setting, the coolant introduced from the liquid inlet pipe 212 can be guided to flow through the liquid flow cavities 5 on both sides of the sunken groove 211 to the liquid outlet pipe 213 respectively, so as to dissipate heat from the heat dissipation structures (for example, relays or components in the BDU9) corresponding to the liquid flow cavities 5 on both sides of the sunken groove 211 respectively, and avoid uneven heat dissipation caused by all or most of the coolant flowing through the liquid flow cavity 5 on one side of the sunken groove 211 to the liquid outlet pipe 213. Of course, here the first flow guiding rib 6 can also be optionally arranged on the liquid cooling cover plate 22, but its setting method needs to be able to meet the purpose of diverting the coolant to both sides of the sunken groove 211. Specifically, when in use, it can be flexibly selected according to the actual situation whether to arrange the first flow guiding rib 6 on the liquid cooling plate 21 or the liquid cooling cover plate 22, and the present disclosure does not limit this.

[0049] Among them, to ensure the heat dissipation effect of the BDU liquid cooling structure, a medium with good fluidity, thermal conductivity and thermal stability and not corroding the liquid cooling plate 21 can be selected to make the coolant. Exemplarily, a mixed solution of ethylene glycol and water with a volume ratio of 1:1 can be selected as the coolant.

[0050] In the exemplary embodiment provided by the present disclosure, with reference to Figure 5 As shown in the figure, in order to more smoothly guide the coolant introduced from the liquid inlet pipe 212 to both sides of the sunken groove 211, the first flow guiding rib 6 can be arranged to be arc-shaped, and the position of the first flow guiding rib 6 corresponding to the sunken groove 211 is bent towards the liquid inlet pipe 212.

[0051] In the exemplary embodiment provided by the present disclosure, with reference to Figure 5As shown, the liquid flow chamber 5 may include a first liquid flow chamber 51 and a second liquid flow chamber 52. The first liquid flow chamber 51 and the second liquid flow chamber 52 are in communication with each other. Moreover, the second liquid flow chamber 52 is closer to the liquid inlet pipe 212 than the first liquid flow chamber 51. The size of the first liquid flow chamber 51 in the first direction is larger than the size of the second liquid flow chamber 52 in the first direction. With such a setting, when applying this BDU liquid cooling structure to a battery pack, according to the distribution characteristics of the components to be cooled in the BDU 9, the first liquid flow chamber 51 can be arranged in the corresponding area where the components to be cooled in the BDU 9 are more concentrated, while the second liquid flow chamber 52 is arranged in the corresponding area where the number of components to be cooled in the BDU 9 is less. This can not only ensure the heat dissipation effect of the BDU 9, but also reduce the occupied space of the liquid flow chamber 5.

[0052] In the exemplary embodiment provided by the present disclosure, referring to Figure 5 As shown, the liquid flow chamber 5 may further include a transition chamber 53. The transition chamber 53 communicates with the first liquid flow chamber 51 and the second liquid flow chamber 52, and the size of the transition chamber 53 in the first direction gradually increases from the second liquid flow chamber 52 to the first liquid flow chamber 51. With such a setting, it is possible to avoid uneven cooling caused by the occurrence of flow dead zones during the process of the coolant flowing from the second liquid flow chamber 52 into the first liquid flow chamber 51. Therefore, this can further ensure the cooling effect of this BDU liquid cooling structure on the BDU 9.

[0053] In the exemplary embodiment provided by the present disclosure, referring to Figure 5 As shown, the liquid cooling plate 21 is provided with a second guiding rib 7. The second guiding rib is arranged between the sinking groove 211 and the liquid outlet pipe 213. The second guiding rib 7 is used to guide the coolant flowing out from both sides of the sinking groove 211 to the liquid outlet pipe 213. In this way, it is possible to avoid the situation of uneven heat dissipation caused by the coolant concentrating here after flowing out from both sides of the sinking groove 211. Among them, the second guiding rib 7 can also be selectively arranged on the liquid cooling cover plate 22, but its setting method needs to be able to meet the purpose of guiding the coolant flowing out from both sides of the sinking groove 211 to the liquid outlet pipe 213. Specifically, when in use, it can be flexibly selected according to the actual situation whether to arrange the second guiding rib 7 on the liquid cooling plate 21 or the liquid cooling cover plate 22, and the present disclosure does not limit this.

[0054] In the exemplary embodiment provided by the present disclosure, referring to Figure 5 As shown, in order to avoid uneven distribution of the coolant in the liquid flow chamber 5 due to the setting of the sinking groove 211, a plurality of second guiding ribs 7 may be provided. At least one of the plurality of second guiding ribs 7 is flush with the end of the first guiding rib 6 close to the sinking groove 211 in the first direction.

[0055] Exemplarily, the second flow guiding rib 7 can be provided in two, wherein, one end of the second flow guiding rib 7 close to the sunken groove 211 is flush with the end of the first flow guiding rib 6 close to the sunken groove 211 in the first direction, and the other is arranged between the previous second flow guiding rib 7 and the inner wall of the first liquid flow cavity 51 and is arranged away from the liquid outlet pipe 213. In this way, the coolant upstream of the sunken groove 211 can be guided by the first flow guiding rib 6 and be split to both sides of the sunken groove 211 to dissipate heat from the components to be cooled of the BDU 9 corresponding to both sides of the sunken groove 211, and the coolant downstream of the sunken groove 211 will flow out smoothly from the liquid outlet pipe 213 under the guidance of the previous second flow guiding rib 7 after flowing out from both sides of the sunken groove 211. This can not only ensure good heat dissipation of the liquid flow cavity 5 located downstream of the sunken groove 211 for the corresponding components to be cooled in the BDU 9, but also ensure that the coolant in the liquid flow cavity 5 can be continuously circulated through the liquid inlet pipe 212 and the liquid outlet pipe 213, so as to ensure that the BDU liquid cooling structure can always dissipate heat well for the BDU 9 provided thereon. And the setting of the latter second flow guiding rib 7 can smoothly guide the coolant around the inner wall of the first liquid flow cavity 51 to prevent this part of the coolant from forming eddy currents in the first liquid flow cavity 51 and affecting the heat dissipation effect of the BDU cooling structure.

[0056] In the exemplary embodiment provided by the present disclosure, referring to Figure 2 , Figure 4 and Figure 7 as shown, the liquid cooling plate 21 can be formed with a first boss 214 and a second boss 215. The first boss 214 and the second boss 215 can be respectively formed with a first cavity 214a and a second cavity 215a. The liquid inlet pipe 212 and the liquid outlet pipe 213 are respectively communicated with the liquid flow cavity 5 through the first cavity 214a and the second cavity 215a. Through such a setting, the pipe diameter sizes of the liquid inlet pipe 212 and the liquid outlet pipe 213 provided on the liquid cooling plate 21 can be matched with the pipe diameters of the coolant conveying pipelines on the electrical equipment (such as a vehicle), so as to facilitate installation.

[0057] In the exemplary embodiment provided by the present disclosure, the liquid cooling plate 21 and the liquid cooling cover plate 22 can be connected in any suitable manner, and the present disclosure does not limit this. Optionally, referring to Figure 5 and Figure 6 as shown, the liquid cooling plate 21 can be formed with a convex edge 216, and the liquid cooling cover plate 22 can be formed with a mounting groove 221. The convex edge 216 is embedded in the mounting groove 221 and is welded to the mounting groove 221. This can not only achieve reliable connection between the liquid cooling plate 21 and the liquid cooling cover plate 22, but also facilitate the positioning and installation between the two before welding. Among them, in order to ensure the connection strength between the liquid cooling plate 21 and the liquid cooling cover plate 22, methods such as friction stir welding, laser welding, molecular diffusion welding or brazing can be used for sealed connection.

[0058] In addition, when the liquid cooling plate 21 and the liquid cooling cover plate 22 are connected by welding, residues (such as flash, burrs, etc.) and minor deformation will occur at the welding position. Therefore, it is usually necessary to process the welding position by means of machining. When processing the welding position by machining, it is not only necessary to ensure that the flatness of the welding position meets the requirements, but also to ensure that the mechanical strength of the entire structure meets the requirements.

[0059] Among them, referring to Figure 5 and Figure 6 As shown in, on the basis of ensuring that the heat dissipation requirements of the structure to be cooled (such as the relay or component in the BDU9) can be met, in order to avoid bulging at the welding position, the convex edge 216 can be provided with a first curved section 216a. The two sides of the sunken groove 211 respectively correspond to the first curved section 216a, and at least part of the two first curved sections 216a is concave towards the sunken groove 211. The installation groove 221 has a second curved section 221a, and the second curved section 221a corresponds to the first curved section 216a. In this way, the welding distance between the convex edges 216 on both sides of the sunken groove 211 can be reduced, thereby reducing the bulging phenomenon caused by welding deformation.

[0060] In the exemplary embodiment provided by the present disclosure, referring to Figure 8 As shown in, an arc transition can be provided between the turbulator 3 and the inner wall of the liquid cooling housing 2. In this way, on the one hand, the flow dead zone at the connection position between the turbulator 3 and the liquid cooling housing 2 can be reduced or even avoided, so as to increase the turbulator effect and improve heat transfer. On the other hand, the connection strength between the turbulator 3 and the liquid cooling housing 2 can also be improved, so that the connection position between the turbulator 3 and the liquid cooling housing 2 can withstand greater pressure.

[0061] In the exemplary embodiment provided by the present disclosure, referring to Figure 2 As shown in, the BDU liquid cooling structure may further include a heat conducting member 1, and the heat conducting member 1 is used to fit with the liquid cooling housing 2 and the BDU9, so as to avoid potential safety hazards caused by direct contact between the liquid cooling housing 2 and the BDU9. Among them, in order to increase the heat transfer efficiency between the BDU9 and the liquid cooling plate 21, a heat conducting member 1 with a certain thickness and a high thermal conductivity can be used. For example, a heat conducting member 1 made of a heat conducting material with good heat conducting performance such as heat conducting silicone grease, heat conducting gel or heat conducting gasket can be used, and the thickness of the heat conducting member 1 is designed to be 0.5 mm to 5 mm. Exemplarily, the thickness of the heat conducting member 1 can be designed to be 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm, or any other suitable value within the range of 0.5 mm to 5 mm. It can be flexibly selected according to the actual situation, and the present disclosure does not limit this.

[0062] Among them, referring to Figures 2 to 4 As shown in Figures 2 to 4 , the liquid cooling housing 2 may include a liquid cooling plate 21. The liquid cooling plate 21 may be provided with a sunken groove 211 that protrudes from the outer surface of the liquid cooling plate 21 toward the liquid flow cavity 5. The heat conducting member 1 may be attached to the liquid cooling plate 21 and includes a first part 11 and a second part 12. The first part 11 and the second part 12 are spaced apart from each other and are respectively located on both sides of the sunken groove 211. Through such a setting, the heat conducting member 1 and the liquid cooling plate 21 can cooperate with each other so that both can avoid the relay baffle in the BDU9 at the same time.

[0063] In the exemplary embodiment provided by the present disclosure, referring to Figure 2 As shown in Figure 2 , the BDU liquid cooling structure may further include an insulating film 8. The insulating film 8 is disposed between the liquid cooling housing 2 and the heat conducting member 1. In this way, on the basis that there is a heat conducting member 1 between the liquid cooling housing 2 and the BDU9, an additional layer of insulation protection can be added, thereby protecting the safety regulations between the BDU9 and the liquid cooling plate 21 and preventing the BDU9 current from flowing to the liquid cooling housing 2 in the case of the failure of the heat conducting member 1, which may affect the use performance of the BDU9 and the safety of the liquid cooling housing 2. Among them, to ensure the protection performance of the insulating film 8, the insulating film 8 may be set to have a thickness of 0.05 mm to 0.5 mm and an insulation resistance greater than 100 MΩ. Here, the insulating film 8 may be made of materials with insulating properties such as polyimide film and insulating paper. Exemplarily, the thickness of the insulating film 8 may be 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm or 0.5 mm, or any other suitable value within the range of 0.05 mm to 0.5 mm. Specifically, it can be flexibly selected according to the actual situation, and the present disclosure does not limit this.

[0064] On the basis of the above technical solution, the present disclosure also provides a battery pack. The battery pack includes the BDU9 and the above-mentioned BDU liquid cooling structure, and the BDU9 is in thermal contact with the liquid cooling housing 2. Among them, the mutual relationship between the liquid cooling housing 2 and the BDU9 has been described in detail in the foregoing content. Therefore, to avoid repetition, the present disclosure will not elaborate herein.

[0065] In the exemplary embodiment provided by the present disclosure, referring to Figure 1 As shown in Figure 1 , the BDU9 may include a copper busbar 91 and electrical components. The copper busbar 91 is electrically connected to the electrical components, and the contact point between the copper busbar 91 and the electrical components is used to be attached to the liquid cooling housing 2. Through such a setting, the heat generated by the heat generating points of the copper busbar 91 and the electrical components can be transferred to the liquid cooling housing 2, and then the coolant in the liquid cooling housing 2 is used to take away this part of the heat to dissipate heat from the BDU9.

[0066] Based on the above technical solutions, the present disclosure further provides an electrical device, which includes the above battery pack. Here, the electrical device can be any suitable electrical device such as a mobile terminal, a portable device, and a vehicle (such as an electric vehicle or a hybrid vehicle), and the present disclosure does not limit this. Among them, the relevant content of the battery pack has been described in detail in the foregoing content. Therefore, to avoid repetition, the present disclosure will not elaborate herein.

[0067] Based on the above technical solutions, the present disclosure further provides a vehicle, which includes the above battery pack.

[0068] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0069] In addition, it should be noted that, in the case of no conflict, the various specific technical features described in the above specific embodiments can be combined in any suitable manner. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0070] In addition, any combination can be made between various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A BDU liquid cooling structure, characterized in that: include: Liquid cooling housing; A liquid flow cavity for circulating the cooling liquid is formed in the liquid cooling shell. The inner wall of the liquid cooling shell is provided with spoiler ribs. The spoiler ribs extend along a first direction that intersects with the circulation direction of the cooling liquid. The spoiler ribs and the inner wall of the liquid cooling shell have an arc transition.

2. The BDU liquid cooling structure according to claim 1, characterized in that: The liquid cooling housing includes a liquid cooling plate and a liquid cooling cover plate, the liquid cooling plate and the liquid cooling cover plate are arranged opposite to each other and are connected to each other, the liquid flow cavity is formed between the liquid cooling plate and the liquid cooling cover plate, and at least one of the liquid cooling plate and the liquid cooling cover plate is provided with the spoiler rib.

3. The BDU liquid cooling structure according to claim 2, characterized in that: The liquid cooling plate and the liquid cooling cover plate are respectively provided with a plurality of spoiler ribs arranged at intervals. The spoiler ribs located on the liquid cooling plate and the spoiler ribs located on the liquid cooling cover plate are alternately arranged along a second direction so that a narrowed flow channel is formed between the spoiler ribs and the opposite liquid cooling plate or the liquid cooling cover plate, wherein the second direction intersects with the first direction.

4. The BDU liquid cooling structure according to claim 2, characterized in that: The liquid cooling plate is provided with a sink groove, which protrudes from the outer surface of the liquid cooling plate toward the liquid flow cavity, and at least part of the spoiler ribs located on the liquid cooling cover plate are formed with an avoidance gap, and the avoidance gap is used to avoid the sink groove.

5. The BDU liquid cooling structure according to claim 4, characterized in that: The liquid cooling plate is connected with a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe and the liquid outlet pipe are respectively communicated with the liquid flow cavity, the trough is arranged between the liquid inlet pipe and the liquid outlet pipe, and the liquid cooling plate is also provided with a first guide rib, the first guide rib is connected to the trough and extends toward the liquid inlet pipe, and the first guide rib is used to guide the coolant flowing into the liquid flow cavity from the liquid inlet pipe to both sides of the trough.

6. The BDU liquid cooling structure according to claim 5, characterized in that: The first guide rib is configured to be arc-shaped, and a position of the first guide rib corresponding to the sink is bent toward the liquid inlet pipe.

7. The BDU liquid cooling structure according to claim 5, characterized in that: The liquid flow chamber includes a first liquid flow chamber and a second liquid flow chamber, the first liquid flow chamber and the second liquid flow chamber are connected to each other, and the second liquid flow chamber is closer to the liquid inlet pipe than the first liquid flow chamber, and the size of the first liquid flow chamber in the first direction is larger than the size of the second liquid flow chamber in the first direction.

8. The BDU liquid cooling structure according to claim 7, characterized in that: The liquid flow chamber further includes a transition chamber, which connects the first liquid flow chamber and the second liquid flow chamber.

9. The BDU liquid cooling structure according to claim 5, characterized in that: The liquid cooling plate is provided with a second guide rib, which is arranged between the sink and the liquid outlet pipe, and the second guide rib is used to guide the cooling liquid flowing out from both sides of the sink to the liquid outlet pipe.

10. The BDU liquid cooling structure according to claim 9, characterized in that: A plurality of the second guide ribs are provided, and an end portion of at least one of the plurality of the second guide ribs close to the sink groove is flush with an end portion of the first guide rib close to the sink groove in the first direction.

11. The BDU liquid cooling structure according to claim 5, characterized in that: The liquid cooling plate is formed with a first boss and a second boss, the first boss and the second boss are respectively formed with a first cavity and a second cavity, and the liquid inlet pipe and the liquid outlet pipe are respectively connected with the liquid flow cavity through the first cavity and the second cavity.

12. The BDU liquid cooling structure according to claim 4, characterized in that: The liquid cooling plate is formed with a convex edge, the liquid cooling cover plate is formed with a mounting groove, and the convex edge is embedded in the mounting groove and connected to the mounting groove.

13. The BDU liquid cooling structure according to claim 12, characterized in that: The convex edge has a first curved section, and the first curved sections correspond to the two sides of the sink groove respectively. At least parts of the two first curved sections are concave toward the sink groove. The mounting groove has a second curved section, and the second curved section corresponds to the first curved section.

14. The BDU liquid cooling structure according to any one of claims 1 to 13, characterized in that: The BDU liquid cooling structure includes a heat conductive member, and the heat conductive member is used to fit with the liquid cooling housing and the BDU.

15. The BDU liquid cooling structure according to claim 14, characterized in that: The liquid cooling housing comprises a liquid cooling plate, the liquid cooling plate is provided with a sink, and the sink protrudes from the outer surface of the liquid cooling plate toward the liquid flow cavity. The heat conducting member is attached to the liquid cooling plate and comprises a first part and a second part, wherein the first part and the second part are spaced apart from each other and are respectively located on two sides of the sink.

16. The BDU liquid cooling structure according to claim 14, characterized in that: The BDU liquid cooling structure further includes an insulating film, and the insulating film is arranged between the liquid cooling housing and the heat conducting member.

17. A battery pack, characterized in that: It comprises a BDU and the BDU liquid cooling structure according to any one of claims 1 to 16, wherein the BDU is in thermal contact with the liquid cooling housing.

18. The battery pack according to claim 17, characterized in that: The BDU includes a copper busbar and an electrical component. The copper busbar is electrically connected to the electrical component, and a contact point between the copper busbar and the electrical component is used to fit with the liquid cooling housing.

19. An electrical equipment, characterized in that: Comprising the battery pack as claimed in claim 17 or 18.

20. A vehicle, characterized in that: Comprising the battery pack as claimed in claim 17 or 18.

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