Plate cooler, battery pack and vehicle

Abstract

The utility model discloses a plate cooler, a battery pack and a vehicle, the plate cooler is used for the battery pack and comprises a cold plate, a water inlet pipeline and a water outlet pipeline, a heat exchange pipe is arranged in the cold plate, the cold plate is provided with a water inlet and a water outlet, the water inlet and the water outlet are both communicated with the heat exchange pipe, and the cold plate is connected with a battery module of the battery pack; the water inlet pipeline is communicated with the water inlet; the water inlet pipeline is communicated with the water outlet, the water outlet pipeline is communicated with the water outlet, heat exchange media circulate in the water inlet pipeline and the water outlet pipeline, and a throttling device is arranged at the end, close to the water outlet, of the water outlet pipeline and comprises memory alloy fins which are arranged on the inner wall of the water outlet pipeline. The memory alloy fins are configured to incline towards the inner wall of the water outlet pipeline when the temperature of the heat exchange medium flowing out of the cold plate exceeds the critical temperature. According to the plate cooler, when the temperature of a heat exchange medium flowing out of the cold plate exceeds the critical temperature, the memory alloy fins incline towards the inner wall of the water outlet pipeline, and the heat exchange effect of the plate cooler is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a plate cooler, a battery pack, and a vehicle. Background Technology

[0002] In existing technologies, the battery pack is analyzed and cooled as a whole, which makes it impossible to perform targeted cooling when a specific area overheats, resulting in energy waste. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a plate cooler that can increase the heat exchange effect of the plate cooler when the temperature of the heat exchange medium flowing out of the cold plate exceeds a critical temperature.

[0004] This utility model also proposes a battery pack, which includes the above-mentioned plate cooler.

[0005] This utility model also proposes a vehicle that includes the aforementioned battery pack.

[0006] According to an embodiment of the present invention, a plate cooler is used for a battery pack and includes a cold plate, an inlet pipe, and an outlet pipe. The cold plate contains a heat exchange tube and has an inlet and an outlet, both of which are connected to the heat exchange tube. The cold plate is connected to the battery module of the battery pack. The inlet pipe is connected to the inlet, and the outlet pipe is connected to the outlet. A heat exchange medium flows through both the inlet and outlet pipes. A throttling device is provided at the end of the outlet pipe near the outlet. The throttling device includes shape memory alloy fins, which are disposed on the inner wall of the outlet pipe. The shape memory alloy fins are configured to tilt towards the inner wall of the outlet pipe when the temperature of the heat exchange medium flowing out of the cold plate exceeds a critical temperature.

[0007] According to an embodiment of the plate cooler of this utility model, a throttling device is provided at one end of the water outlet pipe near the water outlet. The throttling device includes shape memory alloy fins, which are disposed on the inner wall of the water outlet pipe. When the temperature of the heat exchange medium flowing out of the cold plate exceeds the critical temperature, the shape memory alloy fins tilt toward the inner wall of the water outlet pipe, which can increase the flow area of ​​the heat exchange medium at the throttling device, increase the flow effect of the water outlet pipe, and thus increase the heat exchange effect of the plate cooler.

[0008] In addition, the plate cooler according to this utility model may also have the following additional technical features:

[0009] In some embodiments of this utility model, the throttling device further includes two metal rings, which are respectively disposed on both sides of the shape memory alloy fin in the axial direction.

[0010] In some embodiments of this utility model, the two metal rings are welded to the shape memory alloy fins and the water outlet pipe.

[0011] In some embodiments of this utility model, the outer peripheral wall of the shape memory alloy fin abuts against the inner wall of the water outlet pipe.

[0012] In some embodiments of this utility model, the flow area S of the water outlet pipe satisfies: S=(D / 2-(L*SINα)) 2 *3.14; where D is the diameter of the inner wall of the water outlet pipe, L is the length of the shape memory alloy fin along the radial direction of the water outlet pipe, and α is the angle between the shape memory alloy fin and the inner wall of the water outlet pipe.

[0013] In some embodiments of this utility model, the cold plate includes multiple cold plates, and each cold plate is correspondingly provided with each battery module.

[0014] In some embodiments of this utility model, the plate cooler further includes an inlet main pipe and an outlet main pipe, wherein the inlet main pipe is connected to a plurality of inlet pipes corresponding to a plurality of cold plates; and the outlet main pipe is connected to a plurality of outlet pipes corresponding to a plurality of cold plates.

[0015] In some embodiments of this utility model, the shape memory alloy fins are nickel-titanium alloy parts.

[0016] The battery pack according to an embodiment of the present invention includes a battery module and the aforementioned plate cooler, wherein the plate cooler is connected to the battery module.

[0017] According to the battery pack of this utility model embodiment, by providing the above-mentioned plate cooler, a throttling device is provided at one end of the water outlet pipe near the water outlet. The throttling device includes shape memory alloy fins, which are disposed on the inner wall of the water outlet pipe. When the temperature of the heat exchange medium flowing out of the cold plate exceeds the critical temperature, the shape memory alloy fins tilt toward the inner wall of the water outlet pipe, which can increase the flow area of ​​the heat exchange medium at the throttling device, increase the flow effect of the water outlet pipe, and thus increase the heat exchange effect of the plate cooler.

[0018] The vehicle according to an embodiment of the present invention includes the battery pack described above.

[0019] According to the vehicle of this utility model embodiment, by providing the above-mentioned battery pack and plate cooler, a throttling device is provided at one end of the water outlet pipe near the water outlet. The throttling device includes shape memory alloy fins, which are disposed on the inner wall of the water outlet pipe. When the temperature of the heat exchange medium flowing out of the cold plate exceeds the critical temperature, the shape memory alloy fins tilt toward the inner wall of the water outlet pipe, which can increase the flow area of ​​the heat exchange medium at the throttling device, increase the flow effect of the water outlet pipe, and thus increase the heat exchange effect of the plate cooler.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of a plate cooler according to an embodiment of the present utility model;

[0023] Figure 2 This is a front view of the throttling device of a plate cooler according to an embodiment of the present utility model;

[0024] Figure 3 This is a cross-sectional view of the throttling device of a plate cooler according to an embodiment of the present utility model;

[0025] Figure 4 This is a front view of the plate cooler according to an embodiment of the present invention when the temperature of the heat exchange medium in the throttling device exceeds the critical temperature;

[0026] Figure 5 This is a cross-sectional view of the plate cooler according to an embodiment of the present invention when the temperature of the heat exchange medium in the throttling device exceeds the critical temperature.

[0027] Figure label:

[0028] 100. Plate cooler;

[0029] 1. Cold plate; 11. Inlet; 12. Outlet;

[0030] 2. Inlet water pipe; 3. Outlet water pipe;

[0031] 4. Throttling device; 41. Shape memory alloy fins; 42. Metal ring;

[0032] 5. Main inlet pipe; 6. Main outlet pipe. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly 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 utility model according to the specific circumstances.

[0037] The plate cooler 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0038] like Figure 1 As shown, the plate cooler 100 according to an embodiment of the present utility model includes a cold plate 1, a water inlet pipe 2, and a water outlet pipe 3.

[0039] Specifically, the plate cooler 100 is used in the battery pack. The plate cooler 100 has high heat transfer efficiency, enabling it to quickly respond to changes in battery pack temperature and achieve precise temperature control. Furthermore, the plate cooler 100 has a compact structure, occupies little space, and is suitable for installation and use in limited spaces.

[0040] The cold plate 1 is equipped with heat exchange tubes, such as Figure 1 As shown, the cold plate 1 is provided with an inlet 11 and an outlet 12. Both the inlet 11 and the outlet 12 are connected to the heat exchange tube. The heat exchange medium can enter the heat exchange tube from the inlet 11. The cold plate 1 is connected to the battery module of the battery pack. The heat exchange medium carries away the heat of the battery module, increasing the thermal safety of the battery pack.

[0041] Water inlet pipe 2 is connected to water inlet 11, and water outlet pipe 3 is connected to water outlet 12. Both water inlet pipe 2 and water outlet pipe 3 contain heat exchange medium. The heat exchange medium in water inlet pipe 2 can enter the heat exchange tube through water inlet 11. Cold plate 1 is connected to the battery module of the battery pack. The heat exchange medium carries away the heat from the battery module, increasing the thermal safety of the battery pack. After heat exchange, the heat exchange medium enters water outlet pipe 3 through water outlet 12 and leaves the battery pack, thus achieving heat dissipation for the battery module.

[0042] like Figure 1 As shown, a throttling device 4 is provided at one end of the water outlet pipe 3 near the water outlet 12, such as... Figure 2 and Figure 3 As shown, the throttling device 4 includes shape memory alloy fins 41, which are disposed on the inner wall of the outlet pipe 3. The shape memory alloy fins 41 are configured to tilt towards the inner wall of the outlet pipe 3 when the temperature of the heat exchange medium flowing out of the cold plate 1 exceeds the critical temperature. For example, Figure 2 and Figure 3 As shown, the shape memory alloy fins 41 can be pre-formed into a shape at low temperatures. When the temperature of the heat exchange medium flowing out of the cold plate 1 exceeds the critical temperature, such as... Figure 4 and Figure 5 As shown, the shape memory alloy fins 41 will return to their original high-temperature shape. The shape memory alloy fins 41 are inclined towards the inner wall of the water outlet pipe 3, which can increase the flow area of ​​the heat exchange medium at the throttling device 4, increase the flow effect of the water outlet pipe 3, and thus increase the heat exchange effect of the plate cooler 100.

[0043] According to the plate cooler 100 of this utility model embodiment, a throttling device 4 is provided at one end of the water outlet pipe 3 near the water outlet 12. The throttling device 4 includes shape memory alloy fins 41, which are disposed on the inner wall of the water outlet pipe 3. When the temperature of the heat exchange medium flowing out of the cold plate 1 exceeds the critical temperature, the shape memory alloy fins 41 tilt toward the inner wall of the water outlet pipe 3, which can increase the flow area of ​​the heat exchange medium at the throttling device 4, increase the flow effect of the water outlet pipe 3, and thus increase the heat exchange effect of the plate cooler 100.

[0044] In some embodiments of this utility model, such as Figure 3 and Figure 5As shown, the throttling device 4 also includes two metal rings 42, which are respectively disposed on both sides of the shape memory alloy fins 41 in the axial direction. This can increase the strength of the throttling device 4 and prevent it from being damaged by the impact of the heat exchange medium.

[0045] Furthermore, the two metal rings 42 are welded to the shape memory alloy fins 41 and the water outlet pipe 3. The connection between the two metal rings 42 and the shape memory alloy fins 41 and the water outlet pipe 3 is relatively simple and reliable, and the joint formed by the welded connection has excellent sealing performance and is not prone to leakage problems.

[0046] In some embodiments of this utility model, the outer peripheral wall of the shape memory alloy fin 41 abuts against the inner wall of the water outlet pipe 3, which facilitates the connection between the shape memory alloy fin 41 and the water outlet pipe 3, thereby facilitating the management of the flow rate of the water outlet pipe 3 by the shape memory alloy fin 41.

[0047] In some embodiments of this utility model, the flow area S of the water outlet pipe 3 satisfies: S=(D / 2-(L*SINα)) 2 *3.14. Where D is the diameter of the inner wall of the water outlet pipe 3, L is the length of the shape memory alloy fin along the radial direction of the water outlet pipe 3, and α is the angle between the shape memory alloy fin and the inner wall of the water outlet pipe 3.

[0048] For example, the diameter D of the inner wall of the water outlet pipe 3 is 10 mm, and the length L of the shape memory alloy fin 41 along the radial direction of the water outlet pipe 3 is 2 mm.

[0049] When the temperature of the heat exchange medium in the outlet pipe 3 is 20℃, the angle α1 between the shape memory alloy fins 41 and the inner wall of the outlet pipe 3 is 70°, and S=(5-(2*0.9397)). 2 *3.14=30.58mm 2 At this point, the flow area enclosed by the shape memory alloy fins 41 is the smallest;

[0050] When the temperature of the heat exchange medium in the outlet pipe 3 is 80℃, the angle α2 between the shape memory alloy fins 41 and the inner wall of the outlet pipe 3 is 20°, and S=(5-(2*0.342)). 2 *3.14=58.49mm 2 At this point, the flow area enclosed by the shape memory alloy fins 41 is at its maximum.

[0051] According to the fluid static pressure balance type flow rate calculation formula: Q=CA(ΔP / ρ), where Q is the flow rate, C is the flow coefficient, A is the cross-sectional area of ​​the outlet pipe, ΔP is the static pressure difference between upstream and downstream, and ρ is the fluid density. Assuming other parameters remain unchanged, the flow rate is directly proportional to the flow area. Within the temperature range of the heat exchange medium (20-80℃), the flow rate can increase by nearly 100%, creating a sufficiently large flow rate difference.

[0052] In some embodiments of this utility model, such as Figure 1 As shown, the cold plate 1 includes multiple cold plates 1, each corresponding to a battery module. For example, there are 10 battery modules and 10 cold plates 1. When the battery module corresponding to one of the plate coolers 100 experiences abnormal heating due to differences in cell performance or a malfunction, the temperature rises to 60℃. The other nine modules heat normally, with a temperature of 40℃. After the heat exchange medium flows through the plate cooler 100 corresponding to the abnormal battery module, the temperature of the heat exchange medium is heated to a higher temperature than the others that are normal. The throttling device 4 is heated by the heat exchange medium near the outlet 12 of the water outlet pipe 3 and undergoes greater deformation, making the flow capacity of the water outlet pipe 3 stronger. More heat exchange medium flows through the plate cooler 100 with abnormal temperature per unit time, achieving the purpose of zoned cooling and precise temperature control.

[0053] In some embodiments of this utility model, such as Figure 1 As shown, the plate cooler 100 also includes an inlet manifold 5 and an outlet manifold 6. The inlet manifold 5 is connected to multiple inlet pipes 2 corresponding to multiple cold plates 1; the outlet manifold 6 is connected to multiple outlet pipes 3 corresponding to multiple cold plates 1. It can be understood that the inlet manifold 5 is connected in series with the inlet pipes 2 corresponding to multiple cold plates 1, and the outlet manifold 6 is connected in series with the outlet pipes 3 corresponding to multiple cold plates 1, so that the entire battery pack only needs to be equipped with a single inlet manifold 5 and an outlet manifold 6, making the cooling structure of the battery pack relatively simple.

[0054] Furthermore, along the flow direction of the heat exchange medium, the outlet pipe 3 of the cold plate 1 closest to the inlet manifold 5 is furthest from the outlet manifold 6, the second furthest is the outlet pipe 3 of the cold plate 1 closest to the inlet manifold 5, the third furthest is the outlet pipe 3 of the cold plate 1 closest to the inlet manifold 5, and so on. This ensures that the flow capacity of each plate cooler 100 is the same, and the flow rate of the heat exchange medium passing through each plate cooler 100 per unit time is the same throughout the entire cooling circuit.

[0055] In some embodiments of this invention, the shape memory alloy fins 41 are nickel-titanium alloy parts. These nickel-titanium alloy parts can automatically adjust their shape in response to temperature changes. The shape memory alloy fins 41 can improve heat exchange efficiency while reducing damage caused by thermal stress. Furthermore, the shape memory alloy fins 41 also have good corrosion resistance and fatigue resistance, enabling them to operate stably for extended periods in harsh environments.

[0056] The battery pack according to an embodiment of the present invention includes a battery module and the plate cooler 100 described above, wherein the plate cooler 100 is connected to the battery module.

[0057] According to the battery pack of this utility model embodiment, a plate cooler 100 is provided, and a throttling device 4 is provided at one end of the water outlet pipe 3 near the water outlet 12. The throttling device 4 includes shape memory alloy fins 41, which are disposed on the inner wall of the water outlet pipe 3. When the temperature of the heat exchange medium flowing out of the cold plate 1 exceeds the critical temperature, the shape memory alloy fins 41 tilt toward the inner wall of the water outlet pipe 3, which can increase the flow area of ​​the heat exchange medium at the throttling device 4, increase the flow effect of the water outlet pipe 3, and thus increase the heat exchange effect of the plate cooler 100.

[0058] The vehicle according to an embodiment of the present invention includes the battery pack described above.

[0059] According to the vehicle of this utility model embodiment, by providing the above-mentioned battery pack and plate cooler 100, a throttling device 4 is provided at one end of the water outlet pipe 3 near the water outlet 12. The throttling device 4 includes shape memory alloy fins 41, which are disposed on the inner wall of the water outlet pipe 3. When the temperature of the heat exchange medium flowing out of the cold plate 1 exceeds the critical temperature, the shape memory alloy fins 41 tilt toward the inner wall of the water outlet pipe 3, which can increase the flow area of ​​the heat exchange medium at the throttling device 4, increase the flow effect of the water outlet pipe 3, and thus increase the heat exchange effect of the plate cooler 100.

[0060] The plate cooler 100, battery pack, and other components and operations of the vehicle according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. 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 may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A plate cooler, characterized in that, For use in battery packs and including: A cold plate, wherein a heat exchange tube is provided inside the cold plate, and an inlet and an outlet are provided on the cold plate, both of which are connected to the heat exchange tube. The cold plate is connected to the battery module of the battery pack. A water inlet pipe, wherein the water inlet pipe is connected to the water inlet; The water outlet pipe is connected to the water outlet. Both the water inlet pipe and the water outlet pipe contain heat exchange medium. A throttling device is provided at the end of the water outlet pipe near the water outlet. The throttling device includes shape memory alloy fins. The shape memory alloy fins are disposed on the inner wall of the water outlet pipe. The shape memory alloy fins are configured to tilt toward the inner wall of the water outlet pipe when the temperature of the heat exchange medium flowing out of the cold plate exceeds a critical temperature.

2. The plate cooler according to claim 1, characterized in that, The throttling device further includes: Two metal rings are respectively disposed on both sides of the shape memory alloy fin in the axial direction.

3. The plate cooler according to claim 2, characterized in that, The two metal rings are welded to the shape memory alloy fins and the water outlet pipe.

4. The plate cooler according to claim 1, characterized in that, The outer peripheral wall of the shape memory alloy fin abuts against the inner wall of the water outlet pipe.

5. The plate cooler according to claim 1, characterized in that, The flow area S of the outlet pipe satisfies: S=(D / 2-(L*SINα)) 2 *3.14 Wherein, D is the diameter of the inner wall of the water outlet pipe, L is the length of the shape memory alloy fin along the radial direction of the water outlet pipe, and α is the angle between the shape memory alloy fin and the inner wall of the water outlet pipe.

6. The plate cooler according to claim 1, characterized in that, The cold plate includes multiple cold plates, and each cold plate is configured corresponding to each battery module.

7. The plate cooler according to claim 6, characterized in that, Also includes: A main water inlet pipe, which is connected to multiple water inlet pipes corresponding to multiple cold plates; The main water outlet pipe is connected to the multiple water outlet pipes corresponding to the multiple cold plates.

8. The plate cooler according to claim 1, characterized in that, The shape memory alloy fins are nickel-titanium alloy parts.

9. A battery pack, characterized in that, include: Battery module; The plate cooler according to any one of claims 1-8, wherein the plate cooler is connected to the battery module.

10. A vehicle, characterized in that, include: The battery pack according to claim 9.

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