Liquid cooling assembly and power battery

Abstract

The utility model belongs to battery technical field discloses a kind of liquid cooling assembly and power battery.Liquid cooling assembly includes liquid cooling plate, and the liquid cooling channel is formed in the liquid cooling plate, medium inlet and medium outlet are provided on the liquid cooling plate and communicate with the liquid cooling channel, the medium outlet is opened in the liquid cooling plate along Z direction one side, the liquid cooling plate further includes the collection groove that communicates with the liquid cooling channel, the collection groove is protruding in the liquid cooling plate along the other side of the Z direction and with the position corresponding of the medium outlet, the Z direction is the thickness direction of the liquid cooling assembly.Collection groove can increase the accommodating space at medium outlet, metal scrap, fiber, lint and other impurities mixed in cooling medium in processing or assembly process can be collected in collection groove along with the flow of cooling medium, reduce the risk that impurity blocks medium outlet, to ensure the.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a liquid cooling component and a power battery. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the performance, safety and stability of power batteries, as the power supply system for electric vehicles, have always been a key focus of industry research.

[0003] Liquid cooling plates are an important component of the thermal management system in power batteries. Common types include stamped cold plates, profile cold plates, and blown cold plates. During the manufacturing process of liquid cooling plates, impurities such as aluminum shavings and lint are unavoidable. If there are too many impurities, it can easily cause blockage of the internal flow channels of the liquid cooling plate. Blockage of the liquid cooling plate affects its heat exchange performance with the battery pack, which is not conducive to the long-term efficient operation of the power battery. Utility Model Content

[0004] The purpose of this invention is to provide a liquid cooling component and a power battery that can solve the problem of liquid cooling plate blockage and help ensure the long-term efficient operation of the power battery.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A liquid cooling assembly includes a liquid cooling plate with a liquid cooling channel formed therein. The liquid cooling plate has a medium inlet and a medium outlet communicating with the liquid cooling channel. The medium outlet is located on one side of the liquid cooling plate along the Z direction. The liquid cooling plate also includes a collection groove communicating with the liquid cooling channel. The collection groove protrudes from the other side of the liquid cooling plate along the Z direction and corresponds to the position of the medium outlet. The Z direction is the thickness direction of the liquid cooling assembly.

[0007] As an alternative to the above-mentioned liquid cooling assembly, the liquid cooling plate includes:

[0008] The upper plate is provided with the medium outlet;

[0009] A flow channel plate is connected to the upper plate along the Z direction. The upper plate and the flow channel plate form the liquid cooling flow channel, and the flow channel plate is recessed to form the collection groove.

[0010] As an alternative to the above-mentioned liquid cooling component, the flow channel plate is provided with a recessed flow channel groove, the flow channel groove and the upper plate form the liquid cooling flow channel, the collection groove is connected to the flow channel groove, and the depth of the collection groove is greater than the depth of the flow channel groove, so as to form a collection area in the collection groove.

[0011] As an alternative to the above-mentioned liquid cooling component, the collection tank is formed by stamping the flow channel plate;

[0012] Alternatively, the bottom of the collection tank may have a through-hole outlet.

[0013] As an alternative to the above-mentioned liquid cooling assembly, the flow channel plate includes a plate body, a tube body, and a cap. The tube body is sealed to the plate body on one side along the Z direction and communicates with the liquid cooling flow channel. The tube body forms the outlet on the other side along the Z direction. The cap is used to open or close the outlet and is detachably connected to the tube body. A collection area is formed inside the tube body.

[0014] As an alternative to the above-mentioned liquid cooling assembly, the tube body is welded or bonded to the plate body;

[0015] And / or, a sealing element is provided between the cap and the tube body.

[0016] As an alternative to the above-mentioned liquid cooling component, the cover is sleeved on the tube body, and the cover is threadedly connected to the tube body;

[0017] Alternatively, the cap may be fitted onto the tube body, and a clamp may be provided on the outside of the cap;

[0018] Alternatively, the cap may be snapped into place and fixed to the tube body;

[0019] Alternatively, the cover may be provided with fasteners that pass through the cover and are connected to the tube body.

[0020] A power battery includes a battery housing, battery cells, and the aforementioned liquid cooling assembly. The liquid cooling assembly is disposed within the battery housing, and a plurality of battery cells are arranged in an array along the Z-direction on one side of the liquid cooling assembly and located within the battery housing.

[0021] As an alternative to the aforementioned power battery, the battery housing includes a frame and a base plate that is detachably connected to the frame, and the liquid cooling plate is disposed on the base plate along the Z direction.

[0022] And / or, a support pad is provided between the liquid cooling plate and the battery housing.

[0023] As an alternative to the aforementioned power battery, the support pad is made of rigid polyurethane or polypropylene foam material;

[0024] And / or, the support pad is provided with a clearance hole on the side facing the liquid cooling plate along the Z direction, and at least part of the collection groove is located in the clearance hole;

[0025] And / or, the support pad is bonded and fixed to the liquid cooling plate.

[0026] The beneficial effects of this utility model are:

[0027] The liquid cooling assembly provided by this utility model includes a recessed collection tank corresponding to the medium outlet position, which can increase the accommodating space at the medium outlet. This allows impurities such as metal shavings, fibers, and lint mixed into the cooling medium during processing or assembly to be collected in the collection tank along with the flow of the cooling medium, reducing the risk of impurities clogging the medium outlet and ensuring the normal operation of the liquid cooling assembly.

[0028] The power battery provided by this utility model uses the above-mentioned liquid cooling component, which can solve the problem of liquid cooling plate blockage and help ensure the long-term efficient operation of the power battery. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the power battery provided in Embodiment 1 of this utility model;

[0030] Figure 2 This is a cross-sectional view of the power battery provided in Embodiment 1 of this utility model;

[0031] Figure 3 This is a first structural schematic diagram of the liquid cooling assembly provided in Embodiment 1 of this utility model;

[0032] Figure 4 This is a first cross-sectional view of the liquid cooling assembly provided in Embodiment 1 of this utility model;

[0033] Figure 5 yes Figure 4 A magnified view of a section at point A in the middle;

[0034] Figure 6 This is a schematic diagram of the flow channel plate provided in Embodiment 1 of this utility model;

[0035] Figure 7 This is a schematic diagram of the second structure of the liquid cooling assembly provided in Embodiment 1 of this utility model;

[0036] Figure 8 This is a second cross-sectional view of the liquid cooling assembly provided in Embodiment 1 of this utility model;

[0037] Figure 9 This is a schematic diagram of the structure of the support pad provided by this utility model;

[0038] Figure 10 This is a cross-sectional view of the first liquid cooling assembly provided in Embodiment 2 of this utility model at the medium outlet;

[0039] Figure 11 This is a cross-sectional view of the second type of liquid cooling component provided in Embodiment 2 of this utility model at the medium outlet.

[0040] In the picture:

[0041] 10. Battery housing; 11. Base plate; 12. Frame; 13. Top plate; 20. Battery cell; 30. Liquid cooling assembly; 31. Liquid cooling plate; 3101. Liquid cooling channel; 3102. Collection tank; 311. Top plate; 3111. Medium outlet; 312. Channel plate; 3121. Plate body; 31211. Channel protrusion; 31212. Channel groove; 3122. Pipe body; 3123. Cover; 3124. Seal; 3125. Drain outlet; 3126. Clamp; 32. Liquid outlet pipe; 33. Liquid inlet pipe; 40. Support pad; 41. Clearance groove; 42. Clearance hole. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 or an electrical 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 based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0046] Example 1

[0047] like Figure 1 and Figure 2 As shown, this embodiment provides a power battery, including a battery housing 10, battery cells 20, and a liquid cooling assembly 30. Both the battery cells 20 and the liquid cooling assembly 30 are disposed within the battery housing 10. Multiple battery cells 20 are arranged in an array, with each battery cell 20 located on one side of the liquid cooling assembly 30 along the Z-direction. The liquid cooling assembly 30 is used to cool the battery cells 20 and prevent thermal runaway. In this embodiment, the Z-direction is the thickness direction of the liquid cooling assembly 30.

[0048] The liquid cooling assembly 30 includes a liquid cooling plate 31 and a pipe assembly. A liquid cooling channel 3101 is formed in the liquid cooling plate 31. The pipe assembly is connected to the liquid cooling plate 31 and communicates with the liquid cooling channel 3101. The pipe assembly is used for the entry and exit of the cooling medium in the liquid cooling channel 3101 so that the cooling medium in the liquid cooling channel 3101 can circulate, thereby improving the cooling effect of the liquid cooling assembly 30 on the battery cell 20.

[0049] like Figure 3 As shown, the piping assembly includes an outlet pipe 32 and an inlet pipe 33, which are connected to a uniform liquid cooling channel 3101. The cooling medium enters the liquid cooling channel 3101 through the inlet pipe 33, exchanges heat within the liquid cooling channel 3101, and then flows out through the outlet pipe 32. The liquid cooling plate 31 is connected to an external heat exchange system through the outlet pipe 32 and the inlet pipe 33 to achieve cooling or heating of the battery cell 20.

[0050] Combination Figure 4 and Figure 5 As shown, the liquid cooling plate 31 is provided with a medium inlet and a medium outlet 3111 that are connected to the liquid cooling channel 3101. The medium inlet is used to connect to the liquid inlet pipe 33, and the medium outlet 3111 is used to connect to the liquid outlet pipe 32, so as to realize the circulation of the cooling medium in the liquid cooling channel 3101.

[0051] In the existing technology, common liquid cooling plates include stamped cold plates, profile cold plates, and blown cold plates. During the processing and manufacturing of liquid cooling plates, it is difficult to avoid the presence of impurities such as aluminum shavings and lint. If there are too many impurities, it will easily cause blockage of the internal flow channels of the liquid cooling plate. Blockage of the liquid cooling plate affects its heat exchange performance with the battery pack, which is not conducive to the long-term efficient operation of the power battery.

[0052] To solve the above problems, please refer to... Figure 4 and Figure 5As shown, the medium outlet 3111 is located on one side of the liquid cooling plate 31 along the Z direction. The liquid cooling plate 31 also includes a collection tank 3102 communicating with the liquid cooling flow channel 3101. The collection tank 3102 protrudes from the other side of the liquid cooling plate 31 along the Z direction and corresponds to the position of the medium outlet 3111. By providing the collection tank 3102, the accommodating space at the medium outlet 3111 can be increased, allowing impurities such as metal shavings, fibers, and lint mixed into the cooling medium during processing or assembly to be collected in the collection tank 3102 along with the flow of the cooling medium. This reduces the risk of impurities clogging the medium outlet 3111, thereby ensuring the normal operation of the liquid cooling assembly 30.

[0053] like Figure 5 As shown, the liquid cooling plate 31 includes an upper plate 311 and a flow channel plate 312 arranged and connected along the Z direction. The upper plate 311 is provided with a medium outlet 3111. The upper plate 311 and the flow channel plate 312 form a liquid cooling flow channel 3101, and the flow channel plate 312 is recessed to form a collection groove 3102. This arrangement does not require additional components to form the collection groove 3102, resulting in fewer overall components and a simpler structure.

[0054] Combination Figure 5 and Figure 6 As shown, the flow channel plate 312 has a recessed flow channel groove 31212 with a serpentine structure. The flow channel groove 31212 and the upper plate 311 form a liquid cooling flow channel 3101. The collection groove 3102 is connected to the flow channel groove 31212, and the depth of the collection groove 3102 along the Z direction is greater than the depth of the flow channel groove 31212, so as to form a collection area in the collection groove 3102, which is used to contain impurities. This arrangement allows impurities in the cooling medium to enter the deeper collection groove 3102 under the action of gravity during the flow of the cooling medium to the medium outlet 3111, preventing impurities from flowing out with the cooling medium through the medium outlet 3111 and / or blocking the medium outlet 3111.

[0055] like Figure 7 and Figure 8 As shown, the flow channel 31212 and the collection channel 3102 are formed by stamping the flow channel plate 312. While forming the flow channel 31212, a flow channel protrusion 31211 is formed on the side of the flow channel plate 312 opposite to the upper plate 311. This processing method is more convenient, has a better forming effect, helps to reduce costs, and improves the strength of the liquid cooling plate 31.

[0056] Combination Figure 2As shown, the liquid cooling assembly 30 is located on the inner bottom surface of the battery housing 10, and multiple battery cells 20 are located inside the battery housing 10 and positioned on one side of the liquid cooling assembly 30 along the Z-direction. The battery housing 10 includes a frame 12, a top plate 13, and a bottom plate 11 detachably connected to the frame 12. Both ends of the frame 12 along the Z-direction are open structures. The top plate 13 covers one end of the frame 12 along the Z-direction, and the bottom plate 11 covers the other end of the frame 12 along the Z-direction. The liquid cooling plate 31 of the liquid cooling assembly 30 is located on the bottom plate 11 along the Z-direction. By removing the bottom plate 11, the liquid cooling assembly 30 can be exposed without disassembling other structures, facilitating maintenance of the liquid cooling assembly 30, reducing maintenance difficulty and intensity, and improving efficiency.

[0057] Combination Figure 2 and Figure 9 As shown, a support pad 40 is provided between the liquid cooling plate 31 and the battery housing 10. The support pad 40 is provided between the liquid cooling plate 31 and the base plate 11, and can cover the flow channel protrusion 31211 on the liquid cooling plate 31, thereby improving the stability of the liquid cooling plate 31 on the base plate 11 and improving the stability of multiple battery cells 20.

[0058] Optionally, the support pad 40 is made of rigid polyurethane or polypropylene foam. The support pad 40 can provide some support, protection and insulation for the liquid cooling plate 31.

[0059] The support pad 40 is provided with a relief groove 41 and a relief hole 42 on the side facing the liquid cooling plate 31 along the Z direction. At least a portion of the flow channel protrusion 31211 is located in the relief groove 41, and at least a portion of the collection groove 3102 is located in the relief hole 42, so as to avoid interference between the support pad 40 and the liquid cooling plate 31.

[0060] Optionally, the support pad 40 can be an elastic pad to better fit the surface shape of the liquid cooling plate 31 and ensure the stability of the liquid cooling plate 31.

[0061] The battery cell 20 is bonded to the liquid cooling assembly 30 with a thermally conductive medium, which has good thermal conductivity. The support pad 40 is bonded and fixed to the liquid cooling plate 31, which improves the stability of the support pad 40 and prevents the support pad 40 from being misaligned.

[0062] Example 2

[0063] This embodiment provides a power battery, which differs from Embodiment 1 in the structure of the collection tank 3102.

[0064] like Figure 10 As shown, the bottom of the collection tank 3102 is provided with a through outlet 3125 to clean the impurities in the collection tank 3102.

[0065] Specifically, the flow channel plate 312 includes a plate body 3121, a tube body 3122, and a cover 3123. One side of the tube body 3122 along the Z direction is sealed to the plate body 3121, and the other side of the tube body 3122 along the Z direction forms an outlet 3125. The cover 3123 is used to open or close the outlet 3125 and is detachably connected to the tube body 3122. A collection area is formed inside the tube body 3122. This arrangement allows impurities inside the tube body 3122 to be cleaned by removing the cover 3123, enabling periodic cleaning of the collection tank 3102 and preventing impurities from flowing with the cooling medium.

[0066] In some embodiments, the tube body 3122 is welded and fixed to the plate body 3121 to ensure the connection strength and sealing performance of the tube body 3122 and the plate body 3121.

[0067] In some other embodiments, the tube body 3122 can be bonded and fixed to the plate body 3121, which can also improve the connection strength between the tube body 3122 and the plate body 3121.

[0068] In this embodiment, the cover 3123 includes a cover plate and a side plate connected to the cover plate. The side plate is arranged around the circumferential edge of the cover plate and is sleeved on the outside of the tube 3122. The cover plate is located on the other side of the tube 3122 so as to better seal the other side of the tube 3122.

[0069] To improve the sealing performance of the collection tank 3102, preferably, a sealing element 3124 is provided between the cap 3123 and the tube body 3122 to prevent leakage.

[0070] Optionally, the seal 3124 is located between the cover plate of the tube body 3122 and the cap 3123 to improve the sealing performance.

[0071] In other embodiments, the sealing element 3124 can be sleeved on the circumferential outer side of the tube body 3122. The sealing element 3124 is located between the side plate and the circumferential outer wall of the tube body 3122, which can also achieve a sealed connection between the cap 3123 and the tube body 3122.

[0072] In some embodiments, the cap 3123 is fitted onto the tube body 3122, and the cap 3123 is threadedly connected to the tube body 3122 to facilitate the removal of the cap 3123; the thread between the cap 3123 and the tube body 3122 can also play a certain sealing role.

[0073] In some other embodiments, such as Figure 11 As shown, the cap 3123 is fitted onto the pipe body 3122, and a clamp 3126 is fitted onto the outside of the pipe body 3122. The clamp 3126 is tightened around the cap 3123 to fix the cap 3123 to the pipe body 3122.

[0074] In some other embodiments, the cap 3123 is snapped into and fixed to the tube body 3122. For example, the cap 3123 is provided with a snap hole, and the tube body 3122 is provided with a snap protrusion that can snap into the snap hole to fix the tube body 3122 and the cap 3123.

[0075] In some other embodiments, the cap 3123 and the tube body 3122 are fixed together by fasteners. Specifically, the cap 3123 is provided with fasteners, which pass through the cap 3123 and connect to the tube body 3122. For example, the fasteners can be screws, which pass through the cap 3123 and are threadedly connected to the tube body 3122 to fix the cap 3123 and the tube body 3122 together.

[0076] In some other embodiments, the tube 3122 and the plate 3121 are detachably connected so that impurities in the collection area can be cleaned by removing the plate 3121.

[0077] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A liquid cooling assembly, characterized in that, The assembly includes a liquid cooling plate (31), in which a liquid cooling channel (3101) is formed. The liquid cooling plate (31) is provided with a medium inlet and a medium outlet (3111) communicating with the liquid cooling channel (3101). The medium outlet (3111) is located on one side of the liquid cooling plate (31) along the Z direction. The liquid cooling plate (31) also includes a collection groove (3102) communicating with the liquid cooling channel (3101). The collection groove (3102) protrudes from the other side of the liquid cooling plate (31) along the Z direction and corresponds to the position of the medium outlet (3111). The Z direction is the thickness direction of the liquid cooling assembly.

2. The liquid cooling assembly according to claim 1, characterized in that, The liquid cooling plate (31) includes: The upper plate (311) is provided with the medium outlet (3111); The flow channel plate (312) is connected to the upper plate (311) along the Z direction. The upper plate (311) and the flow channel plate (312) form the liquid cooling flow channel (3101). The flow channel plate (312) is recessed to form the collection groove (3102).

3. The liquid cooling assembly according to claim 2, characterized in that, The flow channel plate (312) is provided with a recessed flow channel groove (31212), the flow channel groove (31212) and the upper plate (311) form the liquid cooling flow channel (3101), the collection groove (3102) is connected to the flow channel groove (31212), and the depth of the collection groove (3102) is greater than the depth of the flow channel groove (31212) so as to form a collection area in the collection groove (3102).

4. The liquid cooling assembly according to claim 3, characterized in that, The collection trough (3102) is formed by stamping the flow channel plate (312); Alternatively, the bottom of the collection trough (3102) may have a through outlet (3125).

5. The liquid cooling assembly according to claim 4, characterized in that, The flow channel plate (312) includes a plate body (3121), a tube body (3122), and a cap (3123). The tube body (3122) is sealed to the plate body (3121) on one side along the Z direction and communicates with the liquid cooling flow channel (3101). The tube body (3122) forms the outlet (3125) on the other side along the Z direction. The cap (3123) is used to open or close the outlet (3125) and is detachably connected to the tube body (3122). A collection area is formed inside the tube body (3122).

6. The liquid cooling assembly according to claim 5, characterized in that, The tube body (3122) is welded or bonded to the plate body (3121); And / or, a sealing element (3124) is provided between the cap (3123) and the tube body (3122).

7. The liquid cooling assembly according to claim 5, characterized in that, The cap (3123) is sleeved on the tube body (3122), and the cap (3123) is threadedly connected to the tube body (3122); Alternatively, the cap (3123) may be fitted onto the tube body (3122), and a clamp (3126) may be provided on the outside of the cap (3123); Alternatively, the cap (3123) may be snapped into place with the tube body (3122); Alternatively, a fastener is provided on the cover (3123), the fastener passing through the cover (3123) and connected to the tube body (3122).

8. A power battery, characterized in that, The battery housing (10), battery cells (20), and liquid cooling assembly as described in any one of claims 1-7 are included. The liquid cooling assembly is disposed within the battery housing (10), and a plurality of battery cells (20) are arranged in an array along the Z direction on one side of the liquid cooling assembly and located within the battery housing (10).

9. The power battery according to claim 8, characterized in that, The battery box (10) includes a frame (12) and a base plate (11) that is detachably connected to the frame (12), and the liquid cooling plate (31) is disposed on the base plate (11) along the Z direction; And / or, a support pad (40) is provided between the liquid cooling plate (31) and the battery box (10).

10. The power battery according to claim 9, characterized in that, The support pad (40) is made of rigid polyurethane or polypropylene foam material; And / or, the support pad (40) is provided with a clearance hole (42) on the side facing the liquid cooling plate (31) along the Z direction, and at least part of the collection groove (3102) is located in the clearance hole (42); And / or, the support pad (40) is bonded and fixed to the liquid cooling plate (31).

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