Battery cooling structure, battery pack and vehicle

Abstract

The utility model discloses a battery cooling structure, a battery pack and a vehicle. The battery cooling structure comprises a heat exchange plate; the valve assembly comprises a shell and a valve element, the shell is arranged at an outlet of the heat exchange plate, the valve element is arranged in the shell, and when the pressure of a refrigerant in the heat exchange plate reaches a preset value, the shell is communicated through the valve element so that the refrigerant can be released through the shell. The valve assembly is additionally arranged at the outlet of the heat exchange plate, the pressure of a refrigerant on the heat exchange plate can be properly increased, the evaporation temperature of the refrigerant can be increased, when the pressure of the refrigerant in the heat exchange plate reaches a preset value, the valve element opens the shell, a refrigerant circulation channel is formed, the refrigerant is released through the shell, and therefore the battery cooling effect and the temperature difference between batteries are balanced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a battery cooling structure, a battery pack and a vehicle. Background Art

[0002] In the related technology, in order to reduce the cost of the whole vehicle and improve the cooling efficiency of the battery pack, more and more vehicle models are currently using refrigerant direct cooling.

[0003] However, when the battery pack adopts direct cooling with refrigerant, the temperature of the two-phase refrigerant in the direct cooling plate is related to the refrigerant pressure. The higher the refrigerant evaporation pressure, the higher the evaporation temperature. When the pressure in the heat exchange plate is too low, the evaporation temperature is too low. Although it will improve the cooling effect of the battery, it will increase the temperature difference of the batteries in the battery pack, causing the inconsistency between the batteries to increase. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery cooling structure, which adds a valve assembly at the outlet of the heat exchange plate to appropriately increase the pressure of the refrigerant in the heat exchange plate and increase the evaporation temperature of the refrigerant, thereby achieving a balance between the battery cooling effect and the temperature difference between the batteries.

[0005] The utility model further provides a battery pack.

[0006] The utility model further provides a vehicle.

[0007] According to the battery cooling structure of the utility model, it includes: a heat exchange plate; a valve assembly, the valve assembly includes: a shell and a valve core, the shell is arranged at the outlet of the heat exchange plate, the valve core is arranged in the shell, when the refrigerant pressure in the heat exchange plate reaches a preset value, the valve core conducts the shell to allow the refrigerant to be released through the shell.

[0008] According to the battery cooling structure of the utility model, a valve assembly is added to the outlet of the heat exchange plate, which can appropriately increase the pressure of the refrigerant in the heat exchange plate and increase the evaporation temperature of the refrigerant. When the refrigerant pressure in the heat exchange plate reaches a preset value, the valve core opens the shell to form a channel for the circulation of the refrigerant, and the refrigerant is released through the shell, thereby achieving a balance between the battery cooling effect and the temperature difference between the batteries.

[0009] In some examples of the present invention, the shell includes: a first shell and a second shell, the first shell is connected to the second shell, the refrigerant flows from the first shell to the second shell, the valve core is arranged in the first shell, and the valve core moves in a direction adjacent to or away from the second shell to connect or cut off the shell.

[0010] In some examples of the present invention, the valve assembly further includes: an elastic member, one end of which is disposed on the second housing, and the other end of which abuts against the valve core.

[0011] In some examples of the present invention, a first mounting groove is provided at one end of the second housing adjacent to the valve core, and one end of the elastic member is disposed in the first mounting groove.

[0012] In some examples of the present invention, a single-side gap between the elastic member and the first mounting groove is a, and a has a value range of 0.1 mm ≤ a ≤ 0.3 mm.

[0013] In some examples of the present invention, the first shell includes: a first section and a second section, the first section is connected to an end of the second section away from the second shell, the second section is protruding toward the outside, the valve core is arranged in the second section, and the valve core is sealed at the connection between the first section and the second section.

[0014] In some examples of the present invention, the valve assembly further includes: a sealing member, a second installation groove is provided at the connection between the first section and the second section, the sealing member is provided in the second installation groove, and the valve core abuts against the sealing member.

[0015] In some examples of the present invention, the first shell is a composite injection-molded part, and the second shell is one of a metal part and a composite material part.

[0016] The battery pack according to the utility model comprises: the battery cooling structure described above.

[0017] The vehicle according to the utility model comprises: the battery pack mentioned above.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a schematic diagram of the structure of the valve assembly;

[0021] Figure 2 is a schematic structural diagram of a battery pack according to an embodiment of the utility model;

[0022] Figure 3 is a cross-sectional view of the first shell;

[0023] Figure 4 is a cross-sectional view of the second shell;

[0024] Figure 5 It is a schematic diagram of the structure of the second shell.

[0025] Reference numerals:

[0026] 1. Battery pack;

[0027] 10. heat exchange plate; 20. valve assembly; 200. shell; 201. valve core; 202. first shell; 203. second shell; 204. elastic member; 205. first mounting groove; 206. first section; 207. second section; 208. sealing member; 209. second mounting groove. DETAILED DESCRIPTION

[0028] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0029] Reference below Figure 1-Figure 5 A battery cooling structure according to an embodiment of the present utility model is described.

[0030] like Figure 1 and Figure 2 As shown, the battery pack 1 according to the embodiment of the utility model includes: a battery cooling structure, and the battery cooling structure includes: a heat exchange plate 10 and a valve assembly 20. The heat exchange plate 10 can play a role in heat exchange, mainly for the battery in the battery pack 1 to dissipate heat and increase the temperature, to ensure that the battery in the battery pack 1 can work normally at high and low temperatures, the heat exchange plate 10 can serve as the upper cover of the battery pack 1, and the valve assembly 20 is mainly used to appropriately increase the pressure of the refrigerant in the heat exchange plate 10 and increase the evaporation temperature of the refrigerant.

[0031] like Figure 1 As shown, the valve assembly 20 includes: a shell 200 and a valve core 201. The shell 200 is arranged at the outlet of the heat exchange plate 10, and the valve core 201 is arranged in the shell 200. When the refrigerant pressure in the heat exchange plate 10 reaches a preset value, the valve core 201 conducts the shell 200 to allow the refrigerant to be released through the shell 200.

[0032] The housing 200 is an important component of the valve assembly 20, which can be used for installation and to protect the internal structure of the valve assembly 20. The valve core 201 is a key component of the valve assembly 20, which can mainly realize the control of the fluid by moving. The housing 200 is arranged at the outlet of the heat exchange plate 10, that is, the valve assembly 20 is arranged at the outlet of the heat exchange plate 10, and the valve core 201 is arranged in the housing 200. At this time, the housing 200 can protect the valve core 201, prevent the leakage of the liquid in the valve assembly 20 and ensure the normal operation of the valve assembly 20. When the refrigerant pressure in the heat exchange plate 10 reaches a preset value, the valve core 201 can conduct the housing 200 to form a refrigerant circulation channel, and the refrigerant is released through the housing 200. In other words, when the refrigerant pressure in the heat exchange plate 10 reaches a certain value, the refrigerant can push open the sealed valve core in the housing 200, and can make the outlet of the heat exchange plate 10 and the evaporator always maintain a certain pressure difference during operation. In this way, the battery cooling effect and the battery temperature difference can be balanced.

[0033] Therefore, by adding a valve assembly 20 at the outlet of the heat exchange plate 10, the pressure of the refrigerant in the heat exchange plate 10 can be appropriately increased, and the evaporation temperature of the refrigerant can be increased. When the refrigerant pressure in the heat exchange plate 10 reaches a preset value, the valve core 201 opens the shell 200 to form a channel for the circulation of the refrigerant, and the refrigerant is released through the shell 200, thereby achieving a balance between the battery cooling effect and the temperature difference between the batteries.

[0034] Specifically, Figure 1 , Figure 3 and Figure 4As shown, the shell 200 includes: a first shell 202 and a second shell 203, the first shell 202 is connected to the second shell 203, the refrigerant flows from the first shell 202 to the second shell 203, the valve core 201 is arranged in the first shell 202, and the valve core 201 moves toward the direction adjacent to or away from the second shell 203 to conduct or cut off the shell 200. It should be noted that the first shell 202 and the second shell 203 are components of the shell 200, and the first shell 202 and the second shell 203 are connected. At this time, the shell 200 forms a whole, and the structure is more stable and firm, which is convenient for the installation and setting of the shell 200. When the pressure difference between the first shell 202 and the second shell 203 reaches a certain value, the refrigerant flows from the first shell 202 to the second shell 203, forming a refrigerant circulation channel, realizing the cooling of the battery, and achieving a balance between the battery cooling effect and the temperature difference between the batteries. The valve core 201 is arranged in the first shell 202, at this time The first shell 202 can protect the valve core 201, prevent the leakage of liquid in the valve assembly 20 and ensure the normal operation of the valve assembly 20. When the refrigerant pressure in the heat exchange plate 10 reaches a preset value, the valve core 201 moves toward the direction adjacent to the second shell 203, and a channel for refrigerant circulation is formed by opening the shell 200. The refrigerant is released through the shell 200, thereby achieving a balance between the battery cooling effect and the temperature difference between the batteries. When the refrigerant pressure in the heat exchange plate 10 returns to a normal value, the valve assembly 20 stops working, and the valve core 201 can move in a direction away from the second shell 203.

[0035] Among them, Figure 1 As shown, the valve assembly 20 further includes an elastic member 204 , one end of the elastic member 204 is disposed on the second housing 203 , and the other end of the elastic member 204 abuts against the valve core 201 . The elastic member 204 can provide elastic force and play a role in elastic adjustment. One end of the elastic member 204 is set on the second shell 203, and the other end of the elastic member 204 abuts against the valve core 201. When the pressure difference between the first shell 202 and the second shell 203 reaches a certain value, the valve core 201 moves toward the direction adjacent to the second shell 203, and the elastic member 204 is compressed to open the shell 200 to form a channel for refrigerant circulation. The refrigerant is released through the shell 200, thereby achieving a balance between the battery cooling effect and the temperature difference between the batteries. When the refrigerant pressure in the heat exchange plate 10 returns to a normal value, the elastic member 204 drives the valve core 201 to move in the direction away from the second shell 203. The elastic member 204 provides the valve core 201 with a variable elastic force, thereby realizing the automatic recovery ability of the valve core 201 and improving the intelligent effect of the valve assembly 20.

[0036] In addition, if Figure 1 , Figure 4 and Figure 5As shown, a first mounting groove 205 is provided at one end of the second housing 203 adjacent to the valve core 201, and one end of the elastic member 204 is provided in the first mounting groove 205. A first mounting groove 205 is provided at one end of the second housing 203 adjacent to the valve core 201, and the first mounting groove 205 mainly plays a role of installation, and is mainly used to install the elastic member 204. One end of the elastic member 204 is provided in the first mounting groove 205. At this time, the first mounting groove 205 can install the elastic member 204, and ensure the firmness and reliability of the setting between the elastic member 204 and the second housing 203, so that the elastic member 204 can be more stable during the working process. It should be noted that the diameter of the elastic member 204 is slightly smaller than the width of the first mounting groove 205.

[0037] Of course, if Figure 1 As shown, the unilateral gap between the elastic member 204 and the first mounting groove 205 is a, and the value range of a is: 0.1mm≤a≤0.3mm. It should be noted that the unilateral gap between the elastic member 204 and the first mounting groove 205 needs to meet a certain range. Specifically, the unilateral gap between the elastic member 204 and the first mounting groove 205 cannot be too small, that is, less than 0.1mm. In this way, under the premise that one end of the elastic member 204 can be set in the first mounting groove 205, the unilateral gap between the elastic member 204 and the first mounting groove 205 is too small, which is not convenient for the processing and setting of the first mounting groove 205, and is not conducive to the arrangement of the elastic member 204 in the first mounting groove 205. At the same time, the unilateral gap between the elastic member 204 and the first mounting groove 205 cannot be too large, that is, greater than 0.3mm m, so that the single-sided gap between the elastic member 204 and the first installation groove 205 is too large, which will affect the installation effect of the elastic member 204 in the first installation groove 205, and the elastic member 204 is unstable. When the valve core 201 moves with the elastic member 204, the movement trajectory of the valve core 201 will be offset, affecting the valve core 204 to open the shell 200 to form a channel for the circulation of the refrigerant, and the refrigerant cannot be released through the shell 200, and the battery cannot be cooled, thereby affecting the balance between the battery cooling effect and the temperature difference between the batteries, which is not conducive to improving the cooling efficiency of the battery pack, and cannot be effectively sealed, thereby causing the valve assembly 20 to fail.

[0038] Furthermore, if Figure 1 and Figure 3 As shown, the first shell 202 includes: a first section 206 and a second section 207, the first section 206 is connected to one end of the second section 207 away from the second shell 203, the second section 207 is protruding toward the outside, the valve core 201 is set in the second section 207, and the valve core 201 is blocked at the connection between the first section 206 and the second section 207.

[0039] Specifically, the first section 206 and the second section 207 are components of the first shell 202. The first section 206 is connected to the end of the second section 207 away from the second shell 203. At this time, the first section 206 and the second section 207 form a whole, which is convenient for the installation and setting of the first shell 202. At the same time, the second section 207 is connected to the second shell 203. At this time, the first shell 202 and the second shell 203 form a whole, which is convenient for the installation and setting of the shell 200. The second section 207 is protruding outward, and the valve core 201 is set in the second section 207. At this time, it is convenient for the valve core 201 to move toward or away from the second shell 203, and the valve core 201 is blocked at the connection between the first section 206 and the second section 207. At this time, the connection between the first section 206 and the second section 207 can protect the valve core 201, prevent the leakage of liquid in the valve assembly 20 and ensure the normal operation of the valve assembly 20. It should be noted that the first shell 202 includes a first section 206 and a second section 207. The first section 206 is cylindrical, and the second section 207 is protruding outward. The first section 206 and the second section 207 have different diameters. The second shell 203 is cylindrical, and the second shell 203 has the same diameter.

[0040] In addition, Figure 1 and Figure 3 As shown, the valve assembly 20 further includes: a seal 208, a second installation groove 209 is provided at the connection between the first section 206 and the second section 207, the seal 208 is provided in the second installation groove 209, and the valve core 201 abuts against the seal 208. The seal 208 can mainly ensure that the valve assembly 20 can effectively seal and control the flow of fluid during operation to prevent leakage and fluid pressure relief. The second installation groove 209 mainly plays a role in facilitating installation and is mainly used to install the seal 208. The seal 208 is provided in the second installation groove 209. At this time, the second installation groove 209 can be used to install the seal 208, ensure the firmness and reliability of the connection between the seal 208 and the first section 206 and the second section 207, and facilitate the installation and setting of the seal 208. The valve core 201 abuts against the seal 208. At this time, the seal 208 can play a sealing and protective role on the valve core 201, which can prevent the leakage of the liquid in the valve assembly 20 and ensure the normal operation of the valve assembly 20.

[0041] It should be noted that if Figure 1As shown, the first shell 202 is a composite injection molded part, and the second shell 203 is one of a metal part and a composite material part. That is to say, the first shell 202 is made of composite injection molding, and composite injection molding parts are efficient in production, precise in control, repeatable, highly flexible, low in cost and environmentally friendly, which can meet the production, processing and application requirements of the first shell 202. The second shell 203 is made of metal or composite materials. Metal parts have heat resistance, strong thermal and electrical conductivity, processability and plasticity. Composite parts have high specific strength and high specific modulus, good fatigue resistance, strong fracture resistance, good shock absorption performance, good dimensional stability and chemical stability, and are easy to process and shape, which can meet the production, processing and application requirements of the second shell 203. The first shell 202 is a composite injection molded part, and the second shell 203 is one of a metal part and a composite material part, which can meet the working requirements of the valve assembly 20 and improve the cooling efficiency of the battery cooling structure. It should be noted that the material of the second shell 203 can be aluminum alloy or steel.

[0042] In addition, if Figure 1 As shown, the first shell 202 is connected to the second shell 203 by welding, or the first shell 202 is connected to the second shell 203 by bonding. That is to say, the first shell 202 and the second shell 203 can be welded by a special welding machine, which can make the weld smooth, the size accurate, the structure simple and generous, and can ensure the firmness and reliability of the connection between the first shell 202 and the second shell 203. Alternatively, the first shell 202 and the second shell 203 are bonded, which can simplify the mechanical processing process and make the connection between the first shell 202 and the second shell 203 more stable and firm, so that the structure of the shell 200 is more stable, which is convenient for the installation and setting of the shell 200, and further ensures the sealing of the valve assembly 20.

[0043] It should be noted that if Figure 1 and Figure 3 As shown, the outer diameter of the elastic member 204 is smaller than the diameter of the valve core 201 , the diameter of the second section 207 is larger than the diameter of the valve core 201 , and the diameter of the second installation groove 209 is smaller than the diameter of the valve core 201 .

[0044] A vehicle according to an embodiment of the utility model comprises: the battery pack 1 described in the above embodiment.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In the description of the present utility model, "first feature" and "second feature" may include one or more of the features. In the description of the present utility model, "plurality" means two or more. In the description of the present utility model, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. In the description of the present utility model, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0048] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cooling structure, characterized in that: include: Heat exchange plate (10); A valve assembly (20), the valve assembly (20) comprising: a shell (200) and a valve core (201), the shell (200) being arranged at the outlet of the heat exchange plate (10), the valve core (201) being arranged in the shell (200), and when the refrigerant pressure in the heat exchange plate (10) reaches a preset value, the valve core (201) conducts the shell (200) to allow the refrigerant to be released through the shell (200).

2. The battery cooling structure according to claim 1, characterized in that: The shell (200) includes: a first shell (202) and a second shell (203), the first shell (202) is connected to the second shell (203), the refrigerant flows from the first shell (202) to the second shell (203), the valve core (201) is arranged in the first shell (202), and the valve core (201) moves in a direction close to or away from the second shell (203) to connect or cut off the shell (200).

3. The battery cooling structure according to claim 2, characterized in that: The valve assembly (20) further comprises an elastic member (204), one end of the elastic member (204) being arranged on the second housing (203), and the other end of the elastic member (204) being in contact with the valve core (201).

4. The battery cooling structure according to claim 3, characterized in that: A first mounting groove (205) is provided at one end of the second housing (203) adjacent to the valve core (201), and one end of the elastic member (204) is disposed in the first mounting groove (205).

5. The battery cooling structure according to claim 4, characterized in that: The single-side gap between the elastic member (204) and the first installation groove (205) is a, and the value range of a is: 0.1mm≤a≤0.3mm.

6. The battery cooling structure according to claim 2, characterized in that: The first shell (202) includes: a first section (206) and a second section (207), the first section (206) is connected to one end of the second section (207) away from the second shell (203), the second section (207) is protruding toward the outside, the valve core (201) is arranged in the second section (207), and the valve core (201) is blocked at the connection between the first section (206) and the second section (207).

7. The battery cooling structure according to claim 6, characterized in that: The valve assembly (20) further includes: a sealing member (208); a second mounting groove (209) is provided at the connection between the first section (206) and the second section (207); the sealing member (208) is disposed in the second mounting groove (209); and the valve core (201) abuts against the sealing member (208).

8. The battery cooling structure according to claim 2, characterized in that: The first shell (202) is a composite injection-molded part, and the second shell (203) is one of a metal part and a composite material part.

9. A battery pack, characterized in that: include: The battery cooling structure according to any one of claims 1 to 8.

10. A vehicle, characterized in that: include: The battery pack as claimed in claim 9.

Images