Cold plate structure and vehicle

Abstract

The utility model belongs to the technical field of automobiles, and discloses a cold plate structure and a vehicle, the cold plate structure comprises a bottom plate and a cover plate, a liquid channel and a refrigerant channel are formed between the bottom plate and the cover plate, and the liquid channel and the refrigerant channel are independently arranged; the liquid channel comprises a first liquid inlet section, a second liquid inlet section and a liquid outlet section communicated with the first liquid inlet section and the second liquid inlet section, and the first liquid inlet section and the second liquid inlet section are oppositely arranged and located on the outer side of the refrigerant channel. The high-temperature liquid flows to the two opposite sides of the cold plate structure through the first liquid inlet section and the second liquid inlet section at the same time, so that the heat of the two opposite sides of the cold plate structure is uniformly distributed, the two sides of the edge of the battery pack are uniformly heated, the heat of the battery pack is more uniformly distributed, and the performance of the battery pack is ensured.

Description

Technical Field

[0001] This application belongs to the technical field of automobiles, specifically relating to a cold plate structure and a vehicle. Background Technology

[0002] As a core component of new energy vehicles, the battery pack's operating temperature directly affects its performance and lifespan. Therefore, new energy vehicles are generally equipped with a thermal management system to cool the battery pack when its operating temperature is above the optimal temperature range and heat it when its operating temperature is below the optimal temperature range, thereby ensuring the battery pack operates within the optimal temperature range, guaranteeing its performance, and extending its lifespan.

[0003] Direct cooling technology is a highly efficient battery thermal management method. It absorbs or releases heat through phase changes in the cooling medium, thereby controlling the temperature of the battery pack. However, heating the battery pack using direct cooling technology requires the addition of a heat pump or a heating film inside the battery pack, which increases the vehicle's production cost. To reduce production costs, a new type of cold plate structure has emerged on the market. This structure has both direct cooling channels and liquid cooling channels. The direct cooling channels are connected to the vehicle's air conditioning system, allowing refrigerant to enter and absorb heat from the battery pack, thus cooling the battery pack. However, the liquid cooling channel is connected to the vehicle's liquid temperature management system, allowing a cooler liquid to enter the channel and absorb heat from the battery pack to cool it, or allowing a warmer liquid to enter the channel and transfer heat to the battery pack to heat it. However, since the existing liquid cooling channel extends circumferentially along the cold plate structure, the liquid flows circumferentially along the cold plate when heating the battery pack. This results in a temperature difference between the two sides of the cold plate structure, affecting the uniformity of heat distribution in the battery pack and consequently impacting its performance. Utility Model Content

[0004] This application provides a cold plate structure to make the heat distribution of the battery pack as uniform as possible, so as to ensure the performance of the battery pack.

[0005] The technical solution adopted in this application is as follows:

[0006] A cold plate structure includes a base plate and a cover plate disposed on the base plate. An independent liquid channel and a refrigerant channel are formed between the base plate and the cover plate. The liquid channel includes a first liquid inlet section, a second liquid inlet section, and a liquid outlet section connecting the first liquid inlet section and the second liquid inlet section. The first liquid inlet section and the second liquid inlet section are disposed opposite to each other and are both located outside the refrigerant channel.

[0007] By adopting the above technical solution, when using the cold plate structure in this application, the cold plate structure is installed on the vehicle body, and the cover plate or bottom plate contacts the battery pack, and the refrigerant pipeline of the vehicle's air conditioning system is connected to the refrigerant passage, and the vehicle's liquid temperature management system is connected to the liquid passage.

[0008] When the battery pack temperature is high and cooling is required, the refrigerant from the air conditioning system enters the refrigerant channel, allowing it to flow and absorb heat from the battery pack. This lowers the battery pack temperature and changes the phase of the refrigerant, achieving efficient cooling. Alternatively, cryogenic liquid from the liquid management system enters the liquid channel, absorbing heat from the battery pack as it flows, thus cooling the battery pack.

[0009] When the battery pack temperature is low and heating is required, high-temperature liquid in the liquid temperature management system enters the first liquid inlet section and the second liquid inlet section. The high-temperature liquid in the first liquid inlet section and the second liquid inlet section flows along the first liquid inlet section and the second liquid inlet section and transfers heat to the battery pack, thereby raising the temperature of the battery pack and achieving heating of the battery pack.

[0010] Since the first liquid inlet section and the second liquid inlet section in this application are arranged opposite to each other and are both located outside the refrigerant channel, on the one hand, the temperature of the cold plate structure on both sides can be kept as consistent as possible when the liquid flows in the liquid channel, so that the heat on both sides of the battery pack can be distributed as evenly as possible, thereby avoiding the occurrence of temperature difference between the two sides of the battery pack, thus improving the heat distribution of the battery pack and ensuring the performance of the battery pack.

[0011] Furthermore, because the edges of the battery pack are close to the outside of the vehicle, the temperature on the sides of the battery pack is lower than that at the center. This results in a greater heating requirement for the sides and a lesser cooling requirement for the center. The first and second liquid inlet sections in this application are located outside the refrigerant channel. Therefore, when heating the battery pack, the high-temperature liquid flows from the side to the inside of the cold plate structure, concentrating the heat transfer from the side to the battery pack, thus improving the heating effect on the sides and further ensuring a more uniform heat distribution. When cooling the battery pack, the refrigerant flowing through the refrigerant channel efficiently cools the center, further minimizing the temperature difference between the sides and center, resulting in a more uniform heat distribution and improved battery pack performance.

[0012] Furthermore, since the high-temperature liquid enters the liquid channel through the first liquid inlet section and the second liquid inlet section when the battery pack is heated, and is discharged through the liquid outlet section, the liquid channel has a two-inlet-one-outlet structure, which reduces the number of pipes that need to be installed for the vehicle, thereby reducing the production cost of the vehicle with the cold plate structure in this application and reducing the difficulty of vehicle assembly.

[0013] Optionally, the refrigerant channel includes a refrigerant inlet section, a refrigerant diversion section connected to the refrigerant inlet section, and a refrigerant outlet section connected to the refrigerant diversion section. Multiple refrigerant diversion sections are provided. The liquid channel also includes a first liquid diversion section connected to the first liquid inlet section and a second liquid diversion section connected to the second liquid inlet section. Both the first liquid diversion section and the second liquid diversion section are connected to the liquid outlet section, and at least a portion of the first liquid diversion section and the second liquid diversion section are located between multiple refrigerant diversion sections.

[0014] By adopting the above technical solution, when heating the battery pack, the high-temperature liquid in the liquid temperature management system enters the liquid channel through the first liquid inlet section and the second liquid inlet section. The high-temperature liquid entering the first liquid inlet section flows along the first liquid inlet section and enters the liquid outlet section through the first liquid diversion section. The high-temperature liquid entering the second liquid inlet section flows along the second liquid inlet section and enters the liquid outlet section through the second liquid diversion section. The liquid entering the liquid outlet section finally returns to the liquid temperature management system. When the high-temperature liquid flows in the liquid channel, it can transfer heat to the battery pack to achieve the heating of the battery pack.

[0015] Since at least a portion of the first liquid distribution section and the second liquid distribution section are located between multiple refrigerant distribution sections, on the one hand, the liquid channels and refrigerant channels are distributed throughout the entire cold plate structure to improve the heating or cooling effect on the battery pack; on the other hand, the liquid channels and refrigerant channels are staggered in the cold plate structure to increase the uniformity of heat distribution in the battery pack when cooling or heating it, thereby further improving the cooling or heating effect on the battery pack and further ensuring the performance of the battery pack.

[0016] Optionally, the first liquid diversion section and / or the second liquid diversion section includes a first liquid re-diversion section and a second liquid re-diversion section located inside the first liquid re-diversion section, the second liquid re-diversion section being connected to the liquid outlet section, and the first liquid re-diversion section being connected to the liquid outlet section through a connecting structure.

[0017] By adopting the above technical solution, when heating the battery pack, the high-temperature liquid flowing along the first liquid inlet section and the second liquid inlet section enters the first liquid re-segmentation section and the second liquid re-segmentation section, and then the high-temperature liquid flows along the first liquid re-segmentation section and the second liquid re-segmentation section. The high-temperature liquid flowing along the first liquid re-segmentation section enters the liquid outlet section through the connecting structure, while the liquid flowing along the second liquid re-segmentation section directly enters the liquid outlet section, so that the liquid entering the liquid outlet section is discharged along the liquid outlet section, thereby completing the heating of the battery pack.

[0018] This application increases the flow area of ​​the first liquid diversion section and / or the second liquid diversion section by configuring the first liquid re-diversion section and the second liquid re-diversion section. This causes the liquid flow velocity to decrease after entering the first liquid diversion section through the first liquid inlet section, and the liquid flow velocity to decrease similarly after entering the second liquid diversion section through the second liquid inlet section. This increases the flow time of the liquid in the liquid channel, thereby improving the heat utilization efficiency of the liquid and thus improving the heating efficiency of the battery pack.

[0019] In addition, the first liquid re-segment is connected to the liquid outlet segment through a connecting structure, thereby enabling the first liquid re-segment to avoid the second liquid re-segment and the refrigerant diversion segment, simplifying the channel design, reducing the production difficulty of the cold plate structure and improving the production efficiency of the cold plate structure.

[0020] Optionally, the base plate or the cover plate is provided with a first connecting hole corresponding to the first liquid re-segmentation and the liquid outlet segment. The connecting structure includes a first protruding cover provided on the base plate or the cover plate, and a first connecting channel communicating with the first connecting hole is formed between the first protruding cover and the base plate or the cover plate.

[0021] By adopting the above technical solution, the liquid flowing to the first liquid re-segment enters the first connecting channel through the first connecting hole corresponding to the first liquid re-segment, and then the liquid continues to flow along the first connecting channel, so that the liquid enters the liquid outlet segment through the first connecting hole set in the corresponding liquid outlet segment, thereby allowing the liquid to be collected in the liquid outlet segment and discharged through the liquid outlet, so as to realize the connection between the first liquid re-segment and the liquid outlet segment, thereby reducing the number of liquid outlets that need to be set, and reducing the number of pipelines required for the vehicle. On the one hand, it reduces the difficulty of connecting the vehicle's liquid temperature management system with the liquid channel, and on the other hand, it reduces the production cost of vehicles equipped with the cold plate structure of this application.

[0022] By setting the connecting structure as the first convex cover, the design of the connecting structure is simplified, thereby reducing the production cost of the cold plate structure.

[0023] Optionally, the base plate or the cover plate is provided with a second connecting hole corresponding to the first liquid inlet section and the second liquid inlet section, and the base plate or the cover plate is provided with a second protruding cover, and a second connecting channel communicating with the second connecting hole is formed between the second protruding cover and the base plate or the cover plate.

[0024] By adopting the above technical solution, when heating the battery pack, high-temperature liquid enters the first liquid inlet section or the second liquid inlet section. The high-temperature liquid entering the first liquid inlet section flows along the first liquid inlet section, or the high-temperature liquid entering the second liquid inlet section flows along the second liquid inlet section. This allows the high-temperature liquid to enter the second connecting channel through the second connecting hole corresponding to the first liquid inlet section, or the high-temperature liquid enters the second connecting channel through the second connecting hole corresponding to the second liquid inlet section. This allows the high-temperature liquid to flow along the second connecting channel and enter the second liquid inlet section or the first liquid inlet section through another second connecting hole. This achieves the goal of the high-temperature liquid entering both liquid inlet sections through one liquid inlet. On the one hand, this reduces the number of pipe openings in the cold plate structure, thereby reducing the number of pipes required in the vehicle and lowering the difficulty of connecting the cold plate structure. On the other hand, allowing the high-temperature liquid to enter both the first and second liquid inlet sections through one pipe opening reduces the flow velocity of the high-temperature liquid in the liquid channel, thereby increasing the flow time of the high-temperature liquid in the liquid channel. This fully utilizes the heat of the high-temperature liquid to heat the battery pack, thus improving the heating effect of the battery pack.

[0025] Optionally, the first liquid inlet section and / or the second liquid inlet section includes a transverse extension section extending along the width direction of the base plate and a longitudinal extension section extending along the length direction of the base plate.

[0026] By adopting the above technical solution, since the lateral extension section extends along the width direction of the base plate and the longitudinal extension section extends along the length direction of the base plate, the flow time of the liquid in the liquid channel can be extended to improve the heating effect on the battery pack. At the same time, the longitudinal extension section is located on the side of the refrigerant distribution section so that the liquid channel is more evenly distributed on the base plate, thereby improving the uniformity of heat distribution in the battery pack.

[0027] Optionally, the refrigerant inlet section includes a first refrigerant inlet section and a second refrigerant inlet section arranged opposite to each other, and the refrigerant diversion section includes a plurality of first refrigerant diversion sections connected end to end and a plurality of second refrigerant diversion sections connected end to end. The first refrigerant diversion section located on the outer side is connected to the first refrigerant inlet section, the first refrigerant diversion section located on the inner side is connected to the refrigerant outlet section, the second refrigerant diversion section located on the outer side is connected to the second refrigerant inlet section, and the second refrigerant diversion section located on the inner side is connected to the refrigerant outlet section.

[0028] By adopting the above technical solution, when cooling the battery pack, the refrigerant enters the first refrigerant inlet section and the second refrigerant inlet section. The refrigerant entering the first refrigerant inlet section flows along the first refrigerant inlet section and enters the first refrigerant diversion section located on the outside. The refrigerant entering the first refrigerant diversion section flows along the first refrigerant diversion section and passes through multiple first refrigerant diversion sections in sequence before entering the refrigerant outlet section. The refrigerant entering the second refrigerant inlet section flows along the second refrigerant inlet section and enters the second refrigerant diversion section located on the outside. The refrigerant entering the second refrigerant diversion section flows along the second refrigerant diversion section and passes through multiple second refrigerant diversion sections in sequence before entering the refrigerant outlet section. The refrigerant entering the refrigerant outlet section flows along the refrigerant outlet section and is finally discharged from the refrigerant channel.

[0029] Furthermore, by designing the refrigerant inlet section as including a first refrigerant inlet section and a second refrigerant inlet section, and the refrigerant diversion section as including a first refrigerant diversion section and a second refrigerant diversion section, this application can shorten the flow path of the refrigerant in the refrigerant channel, thereby increasing the efficiency of the refrigerant in absorbing heat from the battery pack and ensuring the cooling effect on the battery pack. On the other hand, it can also enable the refrigerant to flow to various parts of the cold plate structure in a shorter time, thereby improving the cooling effect on the battery pack. In addition, it can also make the heat distribution on both sides of the cold plate structure more uniform, thereby further improving the uniformity of heat distribution in the battery pack and further ensuring the performance of the battery pack.

[0030] Optionally, two adjacent first refrigerant diversion sections and / or second refrigerant diversion sections are connected by a connecting section, and the first refrigerant diversion section and / or second refrigerant diversion section includes a first refrigerant re-segmentation and a second refrigerant re-segmentation.

[0031] By adopting the above technical solution, since the first refrigerant diversion section and / or the second refrigerant diversion section include a first refrigerant re-diversion section and a second refrigerant re-diversion section, the refrigerant in the first refrigerant inlet section and / or the second refrigerant inlet section enters the first refrigerant re-diversion section and the second refrigerant re-diversion section for further diversion. This reduces the flow velocity of the refrigerant in the first refrigerant diversion section and / or the second refrigerant diversion section, thereby increasing the flow time of the refrigerant in the refrigerant channel, increasing the time for the refrigerant to absorb heat from the battery pack, and thus improving the cooling effect of the refrigerant on the battery pack.

[0032] Optionally, the base plate and the cover plate are provided with corresponding fixing holes, and the first refrigerant diversion section and the second refrigerant diversion section are provided with avoidance structures corresponding to the fixing holes.

[0033] By adopting the above technical solution, since the first refrigerant diversion section and the second refrigerant diversion section are provided with a clearance structure for the corresponding fixing holes, the first refrigerant diversion section and the second refrigerant diversion section are made to avoid the fixing holes, so as to facilitate the fixing of the cold plate structure and avoid the phenomenon of refrigerant leakage caused by the fixing holes connecting the first refrigerant diversion section and the second refrigerant diversion section, thus ensuring the sealing of the refrigerant channel.

[0034] Optionally, the width of the liquid channel is greater than the width of the refrigerant channel, and the width D1 of the liquid channel and the width D2 of the refrigerant channel satisfy: 1 / 4 ≤ D2 / D1 ≤ 2 / 3.

[0035] By adopting the above technical solution, since the width D1 of the liquid channel and the width D2 of the refrigerant channel satisfy: 1 / 4≤D2 / D1≤2 / 3, on the one hand, the pressure of the liquid in the liquid channel and the pressure of the refrigerant in the refrigerant channel can be guaranteed, so as to guarantee the flow velocity of the liquid in the liquid channel and the flow velocity of the refrigerant in the refrigerant channel, thereby ensuring the heating and cooling effect of the battery pack. On the other hand, the smoothness of the flow of the liquid in the liquid channel and the smoothness of the flow of the refrigerant in the refrigerant channel can be guaranteed.

[0036] Optionally, the sum of the channel area A1 of the liquid channel and the channel area A2 of the refrigerant channel is A, where A and A1 satisfy: 0.3≤A1 / A≤0.4.

[0037] By adopting the above technical solution, as the vehicle's mileage increases, the temperature of the battery pack will gradually increase, resulting in a greater cooling demand than a heating demand. Therefore, setting the channel area of ​​the liquid channel to be smaller than that of the refrigerant channel ensures both heating and cooling of the battery pack. Setting A1 / A to greater than or equal to 0.3 and less than or equal to 0.4 ensures both heating and cooling of the battery pack.

[0038] Optionally, at least one end of the base plate and / or the cover plate is provided with a reinforcing rib, which is located on opposite sides of the liquid outlet section.

[0039] By adopting the above technical solution, since the battery pack will avoid the end of the cold plate structure in the length direction, the refrigerant channel and liquid channel will have gaps with the end of the cold plate structure. By setting reinforcing ribs at at least one end of the bottom plate and / or cover plate, the structural strength of the end of the cold plate structure can be increased to avoid the possible deformation of the end of the cold plate structure and extend the service life of the cold plate structure.

[0040] This application also discloses a vehicle designed to distribute heat in the battery pack as evenly as possible to ensure the performance of the battery pack.

[0041] A vehicle includes a vehicle body, a battery pack disposed on the vehicle body, and a cold plate structure as described above, the cold plate structure being disposed on the vehicle body, and the cover plate or the bottom plate contacting the battery pack.

[0042] By adopting the above technical solution, since the vehicle in this application uses the above-mentioned cold plate structure, the heat of the battery pack can be evenly distributed to ensure the performance of the battery pack.

[0043] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0044] 1. The cold plate structure in this application includes a base plate and a cover plate disposed on the base plate. The base plate and the cover plate form independent liquid channels and refrigerant channels. The liquid channels include a first liquid inlet section, a second liquid inlet section, and a liquid outlet section connecting the first liquid inlet section and the second liquid inlet section. The first liquid inlet section and the second liquid inlet section are arranged opposite to each other and are both located outside the refrigerant channels. On the one hand, this can make the temperature of the cold plate structure on both sides as consistent as possible when the liquid flows in the liquid channels, so that the heat on both sides of the battery pack can be distributed as evenly as possible, thereby avoiding the occurrence of temperature differences between the two sides of the battery pack, thus improving the heat distribution of the battery pack and ensuring the performance of the battery pack.

[0045] 2. The refrigerant channel in this application includes a refrigerant inlet section, a refrigerant diversion section connected to the refrigerant inlet section, and a refrigerant outlet section connected to the refrigerant diversion section. Multiple refrigerant diversion sections are provided. The liquid channel also includes a first liquid diversion section connected to the first liquid inlet section and a second liquid diversion section connected to the second liquid inlet section. Both the first and second liquid diversion sections are connected to the liquid outlet section, and at least a portion of the first and second liquid diversion sections are located between multiple refrigerant diversion sections. On the one hand, this ensures that the liquid channel and the refrigerant channel are distributed throughout the entire cold plate structure to improve the heating or cooling effect on the battery pack. On the other hand, this allows the liquid channel and the refrigerant channel to be staggered in the cold plate structure to increase the uniformity of heat distribution in the battery pack when cooling or heating it, thereby further improving the cooling or heating effect on the battery pack and further ensuring the performance of the battery pack.

[0046] 3. The first liquid diversion section and / or the second liquid diversion section in this application include a first liquid re-diversion section and a second liquid re-diversion section located inside the first liquid re-diversion section. The end of the second liquid re-diversion section is connected to the beginning of the liquid outlet section, and the end of the first liquid re-diversion section is connected to the liquid outlet section through a connecting structure. This increases the flow area of ​​the first liquid diversion section and / or the second liquid diversion section, so that the liquid flow velocity decreases after entering the first liquid diversion section through the first liquid inlet section, and the liquid flow velocity also decreases after entering the second liquid diversion section through the second liquid inlet section. This increases the flow time of the liquid in the liquid channel, thereby improving the heat utilization efficiency of the liquid and thus improving the heating efficiency of the battery pack. In addition, the end of the first liquid re-diversion section is connected to the liquid outlet section through a connecting structure, so that the first liquid re-diversion section can avoid the second liquid re-diversion section and the refrigerant diversion section, simplifying the channel design, thereby reducing the production difficulty of the cold plate structure and improving the production efficiency of the cold plate structure. Attached Figure Description

[0047] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0048] Figure 1 This is a schematic diagram of the cold plate structure described in one embodiment of this application;

[0049] Figure 2 This is a schematic diagram of the cold plate structure described in one embodiment of this application from another perspective;

[0050] Figure 3 This is a schematic diagram of the structure of the base plate described in one embodiment of this application, where the dashed arrows indicate the flow path of the liquid;

[0051] Figure 4 This is a schematic diagram of the cover plate according to one embodiment of the present application, in which the first convex cover is omitted;

[0052] Figure 5 This is a cross-sectional view of the cold plate structure at the first connecting hole in one embodiment of this application;

[0053] Figure 6 This is a cross-sectional view of the second connecting hole of the cold plate structure described in one embodiment of this application.

[0054] Figure label:

[0055] 1. Base plate; 11. Fixing hole; 12. Reinforcing rib; 2. Cover plate; 21. First connecting hole; 22. First protruding cap; 23. Second protruding cap; 24. Second connecting hole; 3. Liquid channel; 31. First liquid inlet section; 311. Lateral extension section; 312. Longitudinal extension section; 313. Liquid inlet; 314. Pipe joint; 32. Second liquid inlet section; 33. First liquid diversion section; 331. First liquid re-diversion section; 332. Second 34. Liquid re-segmentation; 35. Second liquid diversion section; 351. Liquid outlet section; 4. Refrigerant passage; 41. First refrigerant inlet section; 411. Refrigerant inlet; 42. Second refrigerant inlet section; 43. First refrigerant diversion section; 431. First refrigerant re-segmentation; 432. Second refrigerant re-segmentation; 433. Connecting section; 434. Avoidance structure; 44. Second refrigerant diversion section; 45. Refrigerant outlet section; 451. Refrigerant outlet. Detailed Implementation

[0056] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0057] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0058] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0059] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0060] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0061] Reference Figures 1 to 6 A cold plate structure is disclosed, which includes a base plate 1 and a cover plate 2 disposed on the base plate 1. An independent liquid channel 3 and a refrigerant channel 4 are formed between the base plate 1 and the cover plate 2. The liquid channel 3 includes a first liquid inlet section 31, a second liquid inlet section 32 and a liquid outlet section 35 connecting the first liquid inlet section 31 and the second liquid inlet section 32. The first liquid inlet section 31 and the second liquid inlet section 32 are arranged opposite to each other and are both located outside the refrigerant channel 4.

[0062] It is understood that the base plate 1 or cover plate 2 is provided with a liquid inlet 313 connected to the liquid inlet section, a liquid outlet 351 connected to the liquid outlet section 35, a refrigerant inlet 411 connected to the refrigerant passage 4, and a refrigerant outlet 451 connected to the refrigerant passage 4.

[0063] When using the cold plate structure in this application, the cold plate structure is installed on the vehicle body, while the cover plate 2 or the bottom plate 1 contacts the battery pack, and the refrigerant pipeline of the vehicle's air conditioning system is connected to the refrigerant inlet 411 and the refrigerant outlet 451, and the vehicle's liquid temperature management system is connected to the liquid inlet 313 and the liquid outlet 351.

[0064] When the battery pack temperature is high and cooling is required, the refrigerant from the air conditioning system enters the refrigerant channel 4 through the refrigerant inlet 411. This refrigerant flows through the refrigerant channel 4 and absorbs heat from the battery pack, thereby lowering the battery pack temperature and changing the phase of the refrigerant, achieving efficient cooling. Alternatively, cryogenic liquid from the liquid management system enters the liquid channel 3, absorbing heat from the battery pack as it flows through it, thus achieving cooling. When the cooling requirement of the battery pack is low, either refrigerant or liquid cooling can be used, with refrigerant alone being preferred. When the cooling requirement is high, a combination of refrigerant and liquid cooling methods can be used.

[0065] When the battery pack temperature is low and heating is required, high-temperature liquid in the liquid temperature management system enters the first liquid inlet section 31 and the second liquid inlet section 32. The high-temperature liquid in the first liquid inlet section 31 and the second liquid inlet section 32 flows along the first liquid inlet section 31 and the second liquid inlet section 32 and transfers heat to the battery pack, thereby raising the temperature of the battery pack and achieving heating of the battery pack.

[0066] The terms "low-temperature liquid" and "high-temperature liquid" mentioned above refer to the temperature of the battery pack.

[0067] Since the first liquid inlet section 31 and the second liquid inlet section 32 in this application are arranged opposite to each other and are both located outside the refrigerant channel 4, on the one hand, the temperature of the cold plate structure on both sides can be kept as consistent as possible when the liquid flows in the liquid channel 3, so as to achieve uniform heating on both sides of the battery pack, so that the heat on both sides of the battery pack can be distributed as evenly as possible, so as to avoid the occurrence of temperature difference between the two sides of the battery pack, thereby improving the heat distribution of the battery pack and ensuring the performance of the battery pack.

[0068] Furthermore, because the edges of the battery pack are close to the outside of the vehicle, the temperature on the sides of the battery pack is lower than that at the center. This results in a greater heating requirement for the sides and a lesser cooling requirement for the center. The first liquid inlet section 31 and the second liquid inlet section 32 in this application are located outside the refrigerant channel 4. Therefore, when heating the battery pack, the high-temperature liquid flows from the side to the inside of the cold plate structure, concentrating the heat transfer from the side of the cold plate structure to the battery pack, thus improving the heating effect on the sides and further ensuring a more uniform heat distribution. When cooling the battery pack, the refrigerant flowing through the refrigerant channel 4 efficiently cools the center, further minimizing the temperature difference between the sides and the center, resulting in a more uniform heat distribution and improved battery pack performance.

[0069] Furthermore, since the temperature in the central area of ​​the battery pack is higher than that on the sides, the liquid injected into the liquid channel 3 can also play a role in equalizing the temperature of the battery pack. In other words, the heat in the center of the battery pack can be transferred outward through the liquid in the liquid channel 3, so that the temperature distribution of the entire battery pack is more uniform.

[0070] Furthermore, when the battery pack is heated, the high-temperature liquid enters the liquid channel 3 through the first liquid inlet section 31 and the second liquid inlet section 32, and is discharged through the liquid outlet section 35. In other words, the liquid channel 3 has a two-inlet-one-outlet structure, which reduces the number of pipes that need to be installed for the vehicle, thereby reducing the production cost of the vehicle with the cold plate structure in this application and reducing the difficulty of assembling the vehicle.

[0071] It should be noted that the "liquid temperature management system" mentioned above, for pure electric vehicles, can be the vehicle's motor cooling system, using the heat generated by the motor during vehicle operation to heat the battery pack or using the liquid cooled by the motor cooling system to cool the battery pack; for hybrid vehicles, it can be one or a combination of the vehicle's motor cooling system and engine cooling system, using the heat generated by the engine during vehicle operation to heat the battery pack or using the liquid cooled by the engine cooling system to cool the battery pack; it can also be a newly installed liquid temperature management system specifically serving the liquid channel 3 in the vehicle, which includes a reservoir for storing liquid, a transfer pump for pumping liquid, a PTC (Positive Temperature Coefficient) heater or heating wire for heating the liquid, and a radiator for cooling the liquid; it can even be a combination of one of the motor cooling system and the engine cooling system with the newly installed liquid temperature management system.

[0072] The cold plate structure in this application, by setting up independent refrigerant channels 4 and liquid channels 3, ensures efficient cooling of the battery pack through direct cooling while simultaneously heating the battery pack with liquid. This avoids the need for a heat pump for the vehicle or a heating film for the battery pack, thereby reducing vehicle production costs. In addition, compared to the solution of heating the battery pack with a heat pump, it reduces the vehicle's failure rate and maintenance difficulty, thus improving the user experience.

[0073] This application does not specifically limit the formation method of the refrigerant channel 4 and the liquid channel 3. Preferably, the base plate 1 is stamped to form a refrigerant tank and a liquid tank in the direction away from the cover plate 2. After the cover plate 2 is sealed and connected to the base plate 1, the refrigerant tank and the liquid tank respectively form the refrigerant channel 4 and the liquid channel 3 under the sealing effect of the cover plate 2. In other embodiments, the base plate 1 is stamped to form a recessed cavity in the direction away from the cover plate 2. The recessed cavity is provided with a flow-around rib that is sealed and connected to the base plate 1 and the cover plate 2. The flow-around rib makes the recessed cavity form an independent liquid channel 3 and a refrigerant channel 4. Of course, the refrigerant channel 4 and the liquid channel 3 can also be formed by the structure stamped and formed on the cover plate 2 together with the base plate 1.

[0074] In a preferred embodiment, refer to Figure 4 The refrigerant inlet 411, refrigerant outlet 451, liquid inlet 313, and liquid outlet 351 are all located on the cover plate 2. The refrigerant inlet 411, refrigerant outlet 451, liquid inlet 313, and liquid outlet 351 are all equipped with pipe joints 314 to facilitate the connection of the refrigerant passage 4 and liquid passage 3 with the corresponding pipes of the vehicle, thereby reducing the assembly difficulty of the cold plate structure.

[0075] Of course, in other embodiments, the refrigerant inlet 411, refrigerant outlet 451, liquid inlet 313 and liquid outlet 351 may all be located on the base plate 1, or some of the four may be located on the base plate 1 and the remaining ones may be located on the cover plate 2.

[0076] In a preferred embodiment, the refrigerant channel 4 includes a refrigerant inlet section, a refrigerant diversion section connected to the refrigerant inlet section, and a refrigerant outlet section 45 connected to the refrigerant diversion section. Multiple refrigerant diversion sections are provided. The liquid channel 3 also includes a first liquid diversion section 33 connected to the first liquid inlet section 31 and a second liquid diversion section 34 connected to the second liquid inlet section 32. Both the first liquid diversion section 33 and the second liquid diversion section 34 are connected to the liquid outlet section 35, and at least a portion of the first liquid diversion section 33 and the second liquid diversion section 34 are located between multiple refrigerant diversion sections.

[0077] When heating the battery pack, the high-temperature liquid in the liquid temperature management system enters the liquid channel 3 through the first liquid inlet section 31 and the second liquid inlet section 32. The high-temperature liquid entering the first liquid inlet section 31 flows along the first liquid inlet section 31 and enters the liquid outlet section 35 through the first liquid diversion section 33. The high-temperature liquid entering the second liquid inlet section 32 flows along the second liquid inlet section 32 and enters the liquid outlet section 35 through the second liquid diversion section 34. The liquid entering the liquid outlet section 35 eventually returns to the liquid temperature management system. When the high-temperature liquid flows in the liquid channel 3, it can transfer heat to the battery pack to achieve the heating of the battery pack.

[0078] Since at least a portion of the first liquid diversion section 33 and the second liquid diversion section 34 are located between multiple refrigerant diversion sections, on the one hand, the liquid channel 3 and the refrigerant channel 4 are distributed throughout the entire cold plate structure to improve the heating or cooling effect on the battery pack. On the other hand, the liquid channel 3 and the refrigerant channel 4 are arranged in an alternating manner on the cold plate structure to increase the uniformity of heat distribution in the battery pack when cooling or heating it, thereby further improving the cooling or heating effect on the battery pack and further ensuring the performance of the battery pack.

[0079] The better one is to refer to Figure 3The liquid outlet section 35 is located in the middle of the width direction of the base plate 1. The first liquid inlet section 31 and the first liquid diversion section 33 are both located on one side of the liquid outlet section 35. The second liquid inlet section 32 and the second liquid diversion section 34 are located on the other side of the liquid outlet section 35, so that the liquid heated by the liquid temperature control system first flows to both sides of the cold plate structure, and then is discharged from the liquid channel 3 at the middle position of the width direction of the cold plate structure and returns to the liquid temperature management system.

[0080] Furthermore, refer to Figure 3 The first liquid diversion section 33 and / or the second liquid diversion section 34 include a first liquid re-diversion section 331 and a second liquid re-diversion section 332 located inside the first liquid re-diversion section 331. The second liquid re-diversion section 332 is connected to the liquid outlet section 35, and the first liquid re-diversion section 331 is connected to the liquid outlet section 35 through a connecting structure.

[0081] It is understood that the end of the first liquid re-segment 331 is connected to the liquid outlet segment 35 through a connecting structure, the end of the second liquid re-segment 332 is connected to the beginning of the liquid outlet segment 35, and the liquid outlet segment 35 extends in the length direction of the base plate 1. The beginning of the second liquid re-segment 332 extends from the end of the liquid outlet segment 35 to the beginning of the liquid outlet segment 35 to increase the path of the liquid channel 3.

[0082] It should be noted that the second liquid re-segment 332 being located inside the first liquid re-segment 331 means that at least a portion of the second liquid re-segment 332 is located on the side of the first liquid re-segment 331 near the middle position in the width direction of the base plate 1. In other words, the distance between the second liquid re-segment 332 and the liquid outlet segment 35 is less than the distance between the first liquid re-segment 331 and the liquid outlet segment 35.

[0083] When heating the battery pack, the high-temperature liquid flowing along the first liquid inlet section 31 and the second liquid inlet section 32 enters the first liquid re-segment 331 and the second liquid re-segment 332, and then the high-temperature liquid flows along the first liquid re-segment 331 and the second liquid re-segment 332. The high-temperature liquid flowing along the first liquid re-segment 331 enters the liquid outlet section 35 through the connecting structure, while the high-temperature liquid flowing along the second liquid re-segment 332 directly enters the liquid outlet section 35, so that the high-temperature liquid entering the liquid outlet section 35 flows along the liquid outlet section 35 and returns to the liquid temperature management system through the liquid outlet 351, thereby completing the heating of the battery pack.

[0084] This application increases the flow area of ​​the first liquid diversion section 33 and / or the second liquid diversion section 34 by configuring the first liquid re-diversion section 331 and the second liquid re-diversion section 332. This results in a decrease in the flow velocity of the liquid after it enters the first liquid diversion section 33 through the first liquid inlet section 31, and a similar decrease in the flow velocity of the liquid after it enters the second liquid diversion section 34 through the second liquid inlet section 32. This increases the flow time of the liquid in the liquid channel 3, thereby improving the heat utilization efficiency of the liquid and thus improving the heating efficiency of the battery pack.

[0085] In addition, the end of the first liquid re-segment 331 is connected to the liquid outlet segment 35 through a connecting structure, thereby enabling the first liquid re-segment 331 to avoid the second liquid re-segment 332 and the refrigerant diversion segment, simplifying the channel design, thereby reducing the production difficulty of the cold plate structure and improving the production efficiency of the cold plate structure.

[0086] Preferably, both the first liquid diversion section 33 and the second liquid diversion section 34 include a first liquid re-diversion section 331 and a second liquid re-diversion section 332.

[0087] This application does not impose specific limitations on the connected structure; preferred options are described below. Figure 4 and Figure 5 The base plate 1 or cover plate 2 is provided with a first connecting hole 21 corresponding to the first liquid re-segment 331 and the liquid outlet segment 35. The connecting structure includes a first convex cover 22 provided on the base plate 1 or cover plate 2. The first convex cover 22 and the base plate 1 or cover plate 2 form a first connecting channel that communicates with the first connecting hole 21.

[0088] Specifically, the first connecting hole 21 corresponding to the first liquid re-segment 331 is located at the end of the first liquid re-segment 331.

[0089] Liquid flowing to the end of the first liquid re-segment 331 enters the first connecting channel through the first connecting hole 21 corresponding to the first liquid re-segment 331. The liquid then continues to flow along the first connecting channel, so that the liquid enters the liquid outlet segment 35 through the first connecting hole 21 corresponding to the liquid outlet segment 35. The liquid then collects in the liquid outlet segment 35 and returns to the liquid temperature management system through the liquid outlet 351, thereby achieving the connection between the first liquid re-segment 331 and the liquid outlet segment 35. This reduces the number of liquid outlets 351 that need to be set, thereby reducing the number of pipelines required for the vehicle. On the one hand, it reduces the difficulty of connecting the vehicle's liquid temperature management system to the liquid channel 3, and on the other hand, it reduces the production cost of vehicles equipped with the cold plate structure of this application.

[0090] By setting the connecting structure as the first convex cover 22, the design of the connecting structure is simplified, thereby reducing the production cost of the cold plate structure.

[0091] Preferably, the base plate 1 has a first end and a second end opposite to the first end. The first liquid re-segment 331 extends from the second end to the first end and then folds back to extend towards the second end. That is, the first end and the last end of the first liquid re-segment 331 are both located at the second end of the base plate 1, so that after the liquid enters the first liquid re-segment 331, it first flows from the second end to the first end and then from the first end to the second end, thereby increasing the flow path of the liquid and further improving the heating effect on the battery pack.

[0092] Preferably, the first connecting hole 21 and the first protruding cover 22 are both provided on the cover plate 2, and the first protruding cover 22 is sealed to the cover plate 2. Since the cover plate 2 is a flat plate, the installation difficulty of the first protruding cover 22 is reduced.

[0093] In other implementation examples, the connection structure can also be a tee connecting the ends of the two first liquid subsections 331 and the liquid outlet section 35.

[0094] Furthermore, refer to Figure 2 , Figure 4 and Figure 6 The bottom plate 1 or the cover plate 2 is provided with a second connecting hole 24 at the beginning of the first liquid inlet section 31 and the second liquid inlet section 32, and the bottom plate 1 or the cover plate 2 is provided with a second protruding cover 23. The second protruding cover 23 and the bottom plate 1 or the cover plate 2 form a second connecting channel that communicates with the second connecting hole 24.

[0095] It is understandable that the liquid inlet 313 is provided with a head end that is connected to the first liquid inlet section 31 or the second liquid inlet section 32.

[0096] When the battery pack is heated, high-temperature liquid enters the first liquid inlet section 31 or the second liquid inlet section 32 through liquid inlet 313. The high-temperature liquid entering the first liquid inlet section 31 flows along the first liquid inlet section 31, or the high-temperature liquid entering the second liquid inlet section 32 flows along the second liquid inlet section 32, causing the high-temperature liquid to enter the second connecting channel through the second connecting hole 24 corresponding to the first liquid inlet section 31, or the high-temperature liquid entering the second connecting channel through the second connecting hole 24 corresponding to the second liquid inlet section 32, causing the high-temperature liquid to flow along the second connecting channel and enter the second connecting channel through another second connecting hole 24. In either the liquid inlet section 32 or the first liquid inlet section 31, high-temperature liquid enters both liquid inlet sections via one liquid inlet 313. This reduces the number of liquid inlets 313, thereby reducing the number of pipes required for the vehicle and simplifying the connection to the cold plate structure. Furthermore, by having the high-temperature liquid enter the first liquid inlet section 31 and the second liquid inlet section 32 via one liquid inlet 313, the flow velocity of the high-temperature liquid in the liquid channel 3 is reduced, thereby increasing the flow time of the high-temperature liquid in the liquid channel 3. This allows for full utilization of the heat from the high-temperature liquid to heat the battery pack, thus improving the heating effect on the battery pack.

[0097] Preferably, the first end of the first liquid inlet section 31 extends outward toward the bottom plate 1, and the liquid inlet 313 is provided corresponding to the first end of the first liquid inlet section 31. That is, the liquid inlet 313 is connected to the first liquid inlet section 31 so that the liquid directly enters the first liquid inlet section 31 through the liquid inlet 313. Then, part of the liquid enters the second connecting channel through the second connecting hole 24 opposite to the first liquid inlet section 31, so that the liquid flows along the second connecting channel and enters the second liquid inlet section 32 through the second connecting hole 24 opposite to the second liquid inlet section 32.

[0098] Preferably, the second connecting hole 24 and the second protruding cover 23 are both provided on the cover plate 2, and the second protruding cover 23 is sealed to the cover plate 2, thereby reducing the difficulty of installing the second protruding cover 23.

[0099] Of course, in other embodiments, the design of the second connecting hole 24 and the second convex cover 23 can be omitted, and liquid inlet 313 is provided on the cover plate 2 corresponding to the first liquid inlet section 31 and the second liquid inlet section 32.

[0100] Furthermore, refer to Figure 3 The first liquid inlet section 31 and / or the second liquid inlet section 32 include a transverse extension section 311 extending along the width direction of the base plate 1 and a longitudinal extension section 312 extending along the length direction of the base plate 1.

[0101] Specifically, the liquid inlet 313 is connected to the beginning of the transverse extension section 311.

[0102] Since the lateral extension section 311 extends along the width direction of the base plate 1 and the longitudinal extension section 312 extends along the length direction of the base plate 1, the flow time of the liquid in the liquid channel 3 can be extended to improve the heating effect on the battery pack. At the same time, the longitudinal extension section 312 is located on the side of the refrigerant distribution section so that the liquid channel 3 is more evenly distributed on the base plate 1, thereby improving the uniformity of heat distribution in the battery pack.

[0103] Preferably, both the first liquid inlet section 31 and the second liquid inlet section 32 include a lateral extension section 311 and a longitudinal extension section 312.

[0104] In a preferred embodiment, refer to Figure 3 The refrigerant inlet section includes a first refrigerant inlet section 41 and a second refrigerant inlet section 42 arranged opposite to each other. The refrigerant diversion section includes a plurality of first refrigerant diversion sections 43 connected end to end and a plurality of second refrigerant diversion sections 44 connected end to end. The first end of the outer first refrigerant diversion section 43 is connected to the end of the first refrigerant inlet section 41, and the tail end of the inner first refrigerant diversion section 43 is connected to the first end of the refrigerant outlet section 45. The first end of the outer second refrigerant diversion section 44 is connected to the end of the second refrigerant inlet section 42, and the tail end of the inner second refrigerant diversion section 44 is connected to the first end of the refrigerant outlet section 45.

[0105] It should be noted that multiple first refrigerant diversion sections 43 connected end to end refer to the connection between the end of the outer first refrigerant diversion section 43 and the beginning of the inner first refrigerant diversion section 43 among two adjacent first refrigerant diversion sections 43; multiple second refrigerant diversion sections 44 connected end to end refer to the connection between the end of the outer second refrigerant diversion section 44 and the beginning of the inner second refrigerant diversion section 44 among two adjacent second refrigerant diversion sections 44.

[0106] Specifically, when cooling the battery pack, the refrigerant enters the first refrigerant inlet section 41 and the second refrigerant inlet section 42 through the refrigerant inlet 411. The refrigerant entering the first refrigerant inlet section 41 flows along the first refrigerant inlet section 41 and enters the first refrigerant diversion section 43 located on the outside. The refrigerant entering the first refrigerant diversion section 43 flows along the first refrigerant diversion section 43 and passes through multiple first refrigerant diversion sections 43 in sequence before entering the refrigerant outlet section 45. The refrigerant entering the second refrigerant inlet section 42 flows along the second refrigerant inlet section 42 and enters the second refrigerant diversion section 44 located on the outside. The refrigerant entering the second refrigerant diversion section 44 flows along the second refrigerant diversion section 44 and passes through multiple second refrigerant diversion sections 44 in sequence before entering the refrigerant outlet section 45. The refrigerant entering the refrigerant outlet section 45 flows along the refrigerant outlet section 45 and finally returns to the air conditioning system through the refrigerant outlet 451.

[0107] Furthermore, in this application, by setting the refrigerant inlet section to include a first refrigerant inlet section 41 and a second refrigerant inlet section 42, and setting the refrigerant diversion section to include a first refrigerant diversion section 43 and a second refrigerant diversion section 44, on the one hand, the flow path of the refrigerant in the refrigerant channel 4 can be shortened to ensure the efficiency of the refrigerant in absorbing heat from the battery pack, thereby ensuring the cooling effect on the battery pack. On the other hand, it can enable the refrigerant to flow to various parts of the cold plate structure in a shorter time, thereby improving the cooling effect on the battery pack.

[0108] The better one is to refer to Figure 3 The refrigerant outlet section 45 is located in the middle of the width direction of the base plate 1. The first refrigerant inlet section 41 and the first refrigerant diversion section 43 are both located on one side of the refrigerant outlet section 45, and the second refrigerant inlet section 42 and the second refrigerant diversion section 44 are both located on the other side of the refrigerant outlet section 45, so that after the refrigerant enters the refrigerant channel 4, it first flows to both sides of the cold plate structure and then flows out of the refrigerant channel 4 at the middle position of the cold plate structure and returns to the air conditioning system.

[0109] This application does not specify the number of refrigerant inlets 411. Preferably, there are two refrigerant inlets 411, corresponding to the first refrigerant inlet section 41 and the second refrigerant inlet section 42 respectively, to simplify the structural design of the cold plate structure. In other embodiments, the refrigerant inlet 411 can also refer to the design of the second convex cover 23 described above. That is, there is one refrigerant inlet 411, and the first refrigerant inlet section 41 and the second refrigerant inlet section 42 are connected through the same second convex cover 23 structure as described above.

[0110] Furthermore, refer to Figure 3The two adjacent first refrigerant diversion sections 43 and / or second refrigerant diversion sections 44 are connected by a connecting section 433, and the first refrigerant diversion section 43 and / or second refrigerant diversion section 44 include a first refrigerant re-segment 431 and a second refrigerant re-segment 432.

[0111] It is understandable that the first refrigerant re-segment 431 and the second refrigerant re-segment 432 are connected in parallel.

[0112] Since the first refrigerant diversion section 43 and / or the second refrigerant diversion section 44 include a first refrigerant re-diversion section 431 and a second refrigerant re-diversion section 432, the refrigerant in the first refrigerant inlet section 41 and / or the second refrigerant inlet section 42 is diverted again into the first refrigerant re-diversion section 431 and the second refrigerant re-diversion section 432. This reduces the flow velocity of the refrigerant in the first refrigerant diversion section 43 and / or the second refrigerant diversion section 44, thereby increasing the flow time of the refrigerant in the refrigerant channel 4, increasing the time for the refrigerant to absorb heat from the battery pack, and thus improving the cooling effect of the refrigerant on the battery pack.

[0113] Preferably, two adjacent first refrigerant diversion sections 43 and two adjacent second refrigerant diversion sections 44 are connected by a connecting section 433, and both the first refrigerant diversion section 43 and the second refrigerant diversion section 44 include a first refrigerant re-division section 431 and a second refrigerant re-division section 432.

[0114] It is understandable that one end of the connecting section 433 corresponding to the first refrigerant diversion section 43 is connected to the tail end of the outermost first refrigerant diversion section 43 among the two adjacent first refrigerant diversion sections 43, and the other end of the connecting section 433 is connected to the head end of the innermost first refrigerant diversion section 43 among the two adjacent first refrigerant diversion sections 43; one end of the connecting section 433 corresponding to the second refrigerant diversion section 44 is connected to the tail end of the outermost second refrigerant diversion section 44 among the two adjacent second refrigerant diversion sections 44, and the other end of the connecting section 433 is connected to the head end of the innermost second refrigerant diversion section 44 among the two adjacent second refrigerant diversion sections 44.

[0115] Furthermore, refer to Figure 2 , Figure 3 and Figure 4 The base plate 1 and the cover plate 2 are respectively provided with fixing holes 11. The first refrigerant diversion section 43 and the second refrigerant diversion section 44 are provided with a clearance structure 434 corresponding to the fixing holes 11, so that the first refrigerant diversion section 43 and the second refrigerant diversion section 44 are clearance from the fixing holes 11, so as to facilitate the fixing of the cold plate structure and avoid the phenomenon that the fixing holes 11 connect the first refrigerant diversion section 43 and the second refrigerant diversion section 44, resulting in refrigerant leakage, so as to ensure the sealing of the refrigerant channel 4.

[0116] Specifically, multiple fixing holes 11 are arranged sequentially along the width direction of the cold plate structure, and all the fixing holes 11 are located at the middle position along the length direction of the cold plate structure.

[0117] This application does not specifically limit the avoidance structure 434. Preferably, the avoidance structure 434 is a converging segment connecting the first refrigerant re-segment 431 and the second refrigerant re-segment 432 located on both sides of the fixing hole 11. That is, the first refrigerant re-segment 431 and the second refrigerant re-segment 432 are brought together at the fixing hole 11 by the converging segment, and then separate after passing the fixing hole 11, so as to achieve avoidance between the first refrigerant re-segment 431 and the second refrigerant re-segment 432 and the fixing hole 11. In other embodiments, the avoidance structure 434 can also be a structure formed by bending the first refrigerant re-segment 431 and the second refrigerant re-segment 432 in a direction away from the fixing hole 11.

[0118] In a preferred embodiment, refer to Figure 3 The width of liquid channel 3 is greater than the width of refrigerant channel 4, and the widths D1 and D2 of liquid channel 3 and refrigerant channel 4 satisfy: 1 / 4 ≤ D2 / D1 ≤ 2 / 3. This ensures the pressure of the liquid in liquid channel 3 and the pressure of the refrigerant in refrigerant channel 4, thereby ensuring the flow velocity of the liquid in liquid channel 3 and the flow velocity of the refrigerant in refrigerant channel 4, thus ensuring the heating and cooling effects on the battery pack. On the other hand, it also ensures the smooth flow of the liquid in liquid channel 3 and the smooth flow of the refrigerant in refrigerant channel 4.

[0119] In a preferred embodiment, the channel area of ​​the liquid channel 3 is smaller than the channel area of ​​the refrigerant channel 4, and the sum of the channel area A1 of the liquid channel 3 and the channel area A2 of the refrigerant channel 4 is A, wherein A and A1 satisfy: 0.3≤A1 / A≤0.4, that is, A and A2 satisfy: 0.6≤A2 / A≤0.7.

[0120] It should be noted that the channel area of ​​liquid channel 3 refers to the projected area of ​​liquid channel 3 toward base plate 1, and the channel area of ​​refrigerant channel 4 refers to the projected area of ​​refrigerant channel 4 toward base plate 1.

[0121] As the vehicle's mileage increases, the temperature of the battery pack gradually increases, resulting in a greater cooling demand than a heating demand. Therefore, setting the channel area of ​​liquid channel 3 to be smaller than that of refrigerant channel 4 ensures both heating and cooling of the battery pack. Setting A1 / A to greater than or equal to 0.3 and less than or equal to 0.4 ensures both heating and cooling of the battery pack.

[0122] In a preferred embodiment, refer to Figure 4 At least one end of the base plate 1 and / or cover plate 2 is provided with a reinforcing rib 12, which is located on opposite sides of the liquid outlet section 35.

[0123] Preferably, the base plate 1 has a first end and a second end opposite to the first end in its own length direction. The refrigerant inlet 411, the refrigerant outlet 451 and the liquid inlet 313 are all located at the first end, the liquid outlet 351 is located at the second end, and the reinforcing rib 12 is located at the second end.

[0124] Because the battery pack is designed to avoid the cold plate structure along its length during installation, the refrigerant channel 4 and liquid channel 3 will have gaps at the ends of the cold plate structure. By providing a reinforcing rib 12 at the second end, the structural strength of the cold plate structure at the second end can be increased to prevent deformation at the second end of the cold plate structure and extend its service life.

[0125] This application does not specify the formation method of the reinforcing rib 12; preferably, refer to... Figure 3 The reinforcing rib 12 is a raised rib structure formed by stamping the base plate 1 in a direction away from the cover plate 2, in order to reduce the production cost of the cold plate structure. In other embodiments, the reinforcing rib 12 may also be formed by stamping the cover plate 2 in a direction away from the base plate 1, or the reinforcing rib 12 may be a rib structure separately provided on the cover plate 2 or the base plate 1.

[0126] This application does not specifically limit the material used to manufacture the cold plate structure. Preferably, the cold plate structure is made of aluminum alloy to reduce the production cost of the cold plate structure while ensuring the heating and cooling efficiency of the battery pack, thereby reducing the production cost of vehicles equipped with the cold plate structure of this application. In other embodiments, the cold plate structure may also be made of other composite materials with good thermal conductivity.

[0127] This application also discloses a vehicle, which includes a vehicle body, a battery pack disposed on the vehicle body, and the aforementioned cold plate structure, wherein the cold plate structure is disposed on the vehicle body, and the cover plate 2 or the bottom plate 1 contacts the battery pack.

[0128] Because the vehicle in this application uses the aforementioned cold plate structure, the temperature difference between the two sides of the battery pack is reduced, so that the heat distribution of the battery pack is more uniform, thereby ensuring the performance of the battery pack.

[0129] Preferably, the cover plate 2 contacts the battery pack to increase the contact area between the cold plate structure and the battery pack, thereby improving the heating or cooling efficiency of the battery pack.

[0130] It should be noted that the cold plate structure in this application can be a component constituting the battery pack, or it can be a separate component independent of the battery pack.

[0131] This application does not specify the type of vehicle; it can be a pure electric vehicle or a hybrid vehicle.

[0132] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0133] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0134] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A cold-plate structure, characterized in that, The system includes a base plate (1) and a cover plate (2) disposed on the base plate (1). The base plate (1) and the cover plate (2) form independent liquid channels (3) and refrigerant channels (4). The liquid channel (3) includes a first liquid inlet section (31), a second liquid inlet section (32), and a liquid outlet section (35) connecting the first liquid inlet section (31) and the second liquid inlet section (32). The first liquid inlet section (31) and the second liquid inlet section (32) are arranged opposite to each other and are both located outside the refrigerant channel (4).

2. The cold-plate structure according to claim 1, characterized in that, The refrigerant channel (4) includes a refrigerant inlet section, a refrigerant diversion section connected to the refrigerant inlet section, and a refrigerant outlet section (45) connected to the refrigerant diversion section. Multiple refrigerant diversion sections are provided. The liquid channel (3) also includes a first liquid diversion section (33) connected to the first liquid inlet section (31) and a second liquid diversion section (34) connected to the second liquid inlet section (32). The first liquid diversion section (33) and the second liquid diversion section (34) are both connected to the liquid outlet section (35), and at least a portion of the first liquid diversion section (33) and the second liquid diversion section (34) are located between multiple refrigerant diversion sections.

3. The cold-plate structure according to claim 2, characterized in that, The first liquid diversion section (33) and / or the second liquid diversion section (34) include a first liquid re-diversion section (331) and a second liquid re-diversion section (332) located inside the first liquid re-diversion section (331). The second liquid re-diversion section (332) is connected to the liquid outlet section (35), and the first liquid re-diversion section (331) is connected to the liquid outlet section (35) through a connecting structure.

4. A cold-plate structure according to claim 3, characterized in that, The base plate (1) or the cover plate (2) is provided with a first connecting hole (21) corresponding to the first liquid re-segmentation (331) and the liquid outlet segment (35). The connecting structure includes a first convex cover (22) provided on the base plate (1) or the cover plate (2). The first convex cover (22) and the base plate (1) or the cover plate (2) form a first connecting channel communicating with the first connecting hole (21).

5. A cold-plate structure according to claim 1, characterized in that, The base plate (1) or the cover plate (2) is provided with a second connecting hole (24) corresponding to the first liquid inlet section (31) and the second liquid inlet section (32), and the base plate (1) or the cover plate (2) is provided with a second convex cover (23), and a second connecting channel is formed between the second convex cover (23) and the base plate (1) or the cover plate (2) communicating with the second connecting hole (24).

6. A cold-plate structure according to claim 2, characterized in that, The first liquid inlet section (31) and / or the second liquid inlet section (32) include a transverse extension section (311) extending in the width direction of the base plate (1) and a longitudinal extension section (312) extending in the length direction of the base plate (1).

7. A cold-plate structure according to claim 2, characterized in that, The refrigerant inlet section includes a first refrigerant inlet section (41) and a second refrigerant inlet section (42) arranged opposite to each other. The refrigerant diversion section includes a plurality of first refrigerant diversion sections (43) connected end to end and a plurality of second refrigerant diversion sections (44) connected end to end. The first refrigerant diversion section (43) located on the outer side is connected to the first refrigerant inlet section (41). The first refrigerant diversion section (43) located on the inner side is connected to the refrigerant outlet section (45). The second refrigerant diversion section (44) located on the outer side is connected to the second refrigerant inlet section (42). The second refrigerant diversion section (44) located on the inner side is connected to the refrigerant outlet section (45).

8. A cold-plate structure according to claim 7, characterized in that, The two adjacent first refrigerant diversion sections (43) and / or second refrigerant diversion sections (44) are connected by a connecting section (433), and the first refrigerant diversion section (43) and / or second refrigerant diversion section (44) include a first refrigerant re-segment (431) and a second refrigerant re-segment (432).

9. A cold-plate structure according to claim 7, characterized in that, The base plate (1) and the cover plate (2) are respectively provided with fixing holes (11), and the first refrigerant diversion section (43) and the second refrigerant diversion section (44) are respectively provided with avoidance structures (434) corresponding to the fixing holes (11).

10. A cold-plate structure according to any one of claims 1-9, characterized in that, The width of the liquid channel (3) is greater than the width of the refrigerant channel (4), and the width D1 of the liquid channel (3) and the width D2 of the refrigerant channel (4) satisfy: 1 / 4≤D2 / D1≤2 / 3.

11. A cold-plate structure according to any one of claims 1-9, characterized in that, The sum of the channel area A1 of the liquid channel (3) and the channel area A2 of the refrigerant channel (4) is A, where A and A1 satisfy: 0.3≤A1 / A≤0.

4.

12. A cold-plate structure according to any one of claims 1-9, characterized in that, At least one end of the base plate (1) and / or the cover plate (2) is provided with a reinforcing rib (12), the reinforcing rib (12) being located on opposite sides of the liquid outlet section (35).

13. A vehicle, characterized in that, The vehicle includes a vehicle body, a battery pack disposed on the vehicle body, and a cold plate structure as described in any one of claims 1-12, wherein the cold plate structure is disposed on the vehicle body, and the cover plate (2) or the bottom plate (1) contacts the battery pack.

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