Cooling beam structure, heat management assembly, battery pack and vehicle

Abstract

The utility model relates to the technical field of vehicles, and discloses a cooling beam structure, a heat management assembly, a battery pack and a vehicle. The cooling beam structure is provided with a hollow cavity, a cooling flow channel, a flow channel inlet and a flow channel outlet, the cooling flow channel is located on the peripheral side of the hollow cavity, the flow channel inlet and the flow channel outlet penetrate through the surface of the cooling beam structure, the cooling flow channel is independent of the hollow cavity, and the flow channel inlet communicates with the flow channel outlet through the cooling flow channel. And a cooling medium for exchanging heat with the battery module circulates in the cooling flow channel. On the basis of ensuring the structural strength of the battery pack, the cooling beam structure integrates cooling and heat dissipation functions, the cooling beam structure is of a hollow structure and is light in weight, so that the overall weight of the existing battery pack cannot be increased, the cooling and heat dissipation capability is higher under the extreme condition of thermal runaway of the battery pack, the number of parts is reduced, and the cost is reduced. The space utilization rate of the battery pack is optimized, and the integration degree of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially, relate to a kind of cooling beam structure, thermal management assembly, battery pack and vehicle. BACKGROUND

[0002] Promoting the electric quantity and energy density of battery system is one of the most effective technical means to promote new energy vehicle range, solve user range anxiety. The existing battery pack generally connects a large number of cells in series and parallel, and then connects the heat conduction structure adhesive and the thermal management cold plate, and installs the battery module in the battery box through the sleeve or directly through the mounting beam, improves the connection strength of the battery pack and the connection and fixation of the box, which can effectively reduce the number of parts, optimize the space utilization, reduce the total weight of the battery pack, improve the energy density of the battery and reduce the manufacturing cost.

[0003] However, the liquid cooling plate for battery cooling and the structural beam for improving the structural strength of the battery pack in the existing battery pack are two separate components, which occupy a large space and have low integration of the battery pack. SUMMARY

[0004] Based on the above problems, the purpose of the utility model is to provide a cooling beam structure, a thermal management assembly, a battery pack and a vehicle, which can integrate the liquid cooling plate and the structural beam, reduce the overall space occupied by the liquid cooling plate and the structural beam, and improve the integration of the battery pack.

[0005] To achieve the above purpose, the following technical scheme is provided:

[0006] In a first aspect, the utility model provides a cooling beam structure, which is provided with a hollow chamber, a cooling flow channel, a flow channel inlet and a flow channel outlet. The cooling flow channel is located on the outer circumferential side of the hollow chamber. The flow channel inlet and the flow channel outlet respectively penetrate the surface of the cooling beam structure. The cooling flow channel and the hollow chamber are independent of each other. The flow channel inlet is in communication with the flow channel outlet through the cooling flow channel. The cooling flow channel circulates a cooling medium for heat exchange with a battery module.

[0007] As an optional scheme of the cooling beam structure provided by the utility model, the cooling beam structure is provided with a reinforcing rib. One side of the reinforcing rib is suspended in the hollow chamber. The other side of the reinforcing rib is connected to the side wall of the hollow chamber. The hollow chamber is provided with a support. One end of the support abuts against the first side wall of the hollow chamber. The other end of the support abuts against the second side wall of the hollow chamber. The first side wall and the second side wall are oppositely arranged.

[0008] As an optional scheme of the cooling beam structure provided by the utility model, the side wall of the cooling flow channel is provided with a plurality of parallel branch flow channels, and the branch flow channels are communicated with the cooling flow channel.

[0009] As an optional scheme of the cooling beam structure provided by the utility model, the flow channel inlet and the flow channel outlet are arranged on one side or opposite sides of the cooling beam structure.

[0010] As an optional scheme of the cooling beam structure provided by the utility model, the cooling flow channel is arranged on one side or opposite sides of the hollow chamber.

[0011] In the second aspect, the utility model further provides a heat management assembly, comprising a liquid cooling plate and the cooling beam structure.

[0012] In the third aspect, the utility model further provides a battery pack, comprising a battery module and the heat management assembly.

[0013] As an optional scheme of the battery pack provided by the utility model, the cooling beam structure is a beam structure, a longitudinal beam structure or an edge beam structure of the battery pack.

[0014] As an optional scheme of the battery pack provided by the utility model, the cooling beam structure is provided with a fixing hole, and a fastener passes through the fixing hole and is fixedly connected with a battery box of the battery pack.

[0015] In the fourth aspect, the utility model further provides a vehicle, comprising the battery pack.

[0016] The utility model has the advantages of:

[0017] The cooling beam structure, the heat management assembly, the battery pack and the vehicle provided by the utility model have the advantages that on the basis of ensuring the structural strength of the battery pack, the cooling beam structure integrates the cooling and heat dissipation functions, the cooling medium enters the cooling flow channel through the flow channel inlet and exchanges heat with the battery module, and then flows out through the flow channel outlet, since the cooling beam structure is a hollow structure, the weight of the cooling beam structure is light, the overall weight of the existing battery pack is not increased, and since the cooling beam structure integrates the structural beam and the liquid cooling plate, the heat capacity of the heat management assembly is larger than that of the liquid cooling plate, the cooling and heat dissipation capacity is higher in the extreme case of thermal runaway of the battery pack, the heat diffusion safety performance of the battery pack is improved, the cooling beam structure integrates the structural beam and the liquid cooling plate in the battery pack into a functional structural member with the heat management function, the number of parts is reduced, the space utilization of the battery pack is optimized, the integration degree of the battery pack is improved, and favorable conditions are provided for improving the energy density, the loadable power and the vehicle cruising range of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and the drawings.

[0019] Figure 1 is a structure schematic diagram of the cooling beam structure under a first visual angle provided by the embodiment of the present application, wherein the flow passage inlet and the flow passage outlet are located at the same side and the same end;

[0020] Figure 2 is a sectional view schematic diagram of the cooling beam structure under a second visual angle provided by the embodiment of the present application, wherein the flow passage inlet and the flow passage outlet are located at the same side and the same end;

[0021] Figure 3 is a sectional view schematic diagram of the cooling beam structure under a third visual angle provided by the embodiment of the present application, wherein the flow passage inlet and the flow passage outlet are located at different sides and the same end;

[0022] Figure 4 is a structure schematic diagram of the cooling beam structure under a first visual angle provided by the embodiment of the present application, wherein the flow passage inlet and the flow passage outlet are located at the same side and different ends;

[0023] Figure 5 is a sectional view schematic diagram of the cooling beam structure under a third visual angle provided by the embodiment of the present application, wherein the flow passage inlet and the flow passage outlet are located at the same side and the same end;

[0024] Figure 6 is a sectional view schematic diagram of the cooling beam structure under a second visual angle provided by the embodiment of the present application, wherein the flow passage inlet and the flow passage outlet are located at the same side and different ends;

[0025] Figure 7 is a sectional view schematic diagram of the cooling beam structure under a second visual angle provided by the embodiment of the present application, wherein two cooling flow passages are connected in one case;

[0026] Figure 8 is a sectional view schematic diagram of the cooling beam structure under a second visual angle provided by the embodiment of the present application, wherein two cooling flow passages are connected in another case;

[0027] Figure 9 is a sectional view schematic diagram of the cooling beam structure under a second visual angle provided by the embodiment of the present application, wherein two cooling flow passages are connected in another case;

[0028] Figure 10is the cross-sectional view schematic drawing of the cooling beam structure under the fourth visual angle provided by the embodiment of the utility model;

[0029] Figure 11 is the partial cross-sectional view schematic drawing of the cooling beam structure, wherein the cooling flow channel is arc-shaped;

[0030] Figure 12 is the partial cross-sectional view schematic drawing of the cooling beam structure, wherein the cooling flow channel is trapezoidal;

[0031] Figure 13 is the partial cross-sectional view schematic drawing of the cooling beam structure, wherein the cooling flow channel is rectangular;

[0032] Figure 14 is the cross-sectional view schematic drawing of the cooling beam structure under the fifth visual angle provided by the embodiment of the utility model;

[0033] Figure 15 is the cross-sectional view schematic drawing of the cooling beam structure under the fifth visual angle provided by the embodiment of the utility model, wherein the cooling beam structure is provided with the reinforcing rib;

[0034] Figure 16 is the cross-sectional view schematic drawing of the cooling beam structure under the fifth visual angle provided by the embodiment of the utility model, wherein the cooling beam structure is provided with the vertical support;

[0035] Figure 17 is the cross-sectional view schematic drawing of the cooling beam structure under the fifth visual angle provided by the embodiment of the utility model, wherein the cooling beam structure is provided with the inclined support;

[0036] Figure 18 is the structure schematic drawing of the heat management assembly comprising the cooling beam structure provided by the embodiment of the utility model, wherein the cooling pipeline adopts single-side water inlet and outlet;

[0037] Figure 19 is the structure schematic drawing of the heat management assembly comprising the cooling beam structure provided by the embodiment of the utility model, wherein the cooling pipeline adopts double-side water inlet and outlet;

[0038] Figure 20 is the structure schematic drawing of the battery pack comprising the cooling beam structure provided by the embodiment of the utility model, wherein the cooling beam structure is arranged along the length direction of the battery pack;

[0039] Figure 21 is the structure schematic drawing of the battery pack comprising the cooling beam structure provided by the embodiment of the utility model, wherein the cooling beam structure is arranged along the width direction of the battery pack;

[0040] Figure 22 is a structural diagram of a battery pack including a cooling beam structure provided by the embodiment of the utility model, wherein the cooling pipeline adopts double-side water inlet and outlet.

[0041] In the figure:

[0042] 1, cooling beam structure; 2, liquid cooling plate; 3, battery module; 4, cooling pipeline;

[0043] 11, hollow chamber; 12, cooling flow channel; 121, branch flow channel; 13, flow channel inlet; 14, flow channel outlet; 15, fixing hole; 16, reinforcing rib; 17, support piece. DETAILED DESCRIPTION

[0044] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the embodiment of the utility model will be further described in detail below in combination with the drawings. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0045] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0046] In the description of the utility model, it needs to be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0047] As Figures 1 to 22As shown, the embodiment provides a cooling beam structure 1, which is provided with a hollow chamber 11, a cooling flow channel 12 located at the outer peripheral side of the hollow chamber 11, a flow channel inlet 13 and a flow channel outlet 14 penetrating the surface of the cooling beam structure 1 respectively, the cooling flow channel 12 is independent of the hollow chamber 11, the flow channel inlet 13 is communicated with the flow channel outlet 14 through the cooling flow channel 12, and the cooling flow channel 12 circulates a cooling medium for heat exchange with the battery module 3.

[0048] On the basis of ensuring the structural strength of the battery pack, the cooling beam structure 1 integrates the cooling and heat dissipation functions, the cooling medium enters the cooling flow channel 12 through the flow channel inlet 13 and exchanges heat with the battery module 3, and then flows out through the flow channel outlet 14. Since the cooling beam structure 1 is an internal hollow structure, the weight of the cooling beam structure 1 is lighter, which will not increase the overall weight of the existing battery pack. At the same time, since the cooling beam structure 1 integrates the structural beam and the liquid cooling plate 2, the thermal capacity of the thermal management assembly is larger than that of the liquid cooling plate 2 alone, and the cooling and heat dissipation capacity is higher in the extreme case of thermal runaway of the battery pack, which improves the thermal diffusion safety performance of the battery pack. The cooling beam structure 1 integrates the structural beam and the liquid cooling plate 2 in the battery pack into a functional structural member with thermal management function, reduces the number of parts, optimizes the space utilization of the battery pack, and improves the integration degree of the battery pack. It provides favorable conditions for the improvement of the energy density, the loadable power of the battery pack and the vehicle cruising range.

[0049] To avoid the risk of collapse of the structure at the hollow chamber 11, the cooling beam structure 1 is optionally provided with a reinforcing rib 16, one side of the reinforcing rib 16 is suspended in the hollow chamber 11, and the other side of the reinforcing rib 16 is connected to the side wall of the hollow chamber 11; and / or, the hollow chamber 11 is provided with a support 17, one end of the support 17 abuts against the first side wall of the hollow chamber 11, and the other end of the support 17 abuts against the second side wall of the hollow chamber 11, and the first side wall and the second side wall are oppositely arranged. The thickness of the reinforcing rib 16 and the support 17 is 1-50mm, preferably 3, 5, 8mm.

[0050] To improve the cooling efficiency of the cooling flow channel 12, the side wall of the cooling flow channel 12 is optionally provided with a plurality of parallel branch flow channels 121, and the branch flow channels 121 are communicated with the cooling flow channel 12. The branch flow channels 121 can be located on the side of the cooling flow channel 12 away from the hollow chamber 11 to effectively cool and dissipate heat for the battery module. The cross-sectional shape of the cooling flow channel 12 can be rectangular, trapezoidal or arc-shaped. The cross-sectional shape of the branch flow channel 121 can be triangular or rectangular. The size of the branch flow channel 121 is 0.1mm-10mm, preferably 1mm. The number of branch flow channels 121 in a single cooling flow channel 12 is 3-10, preferably 3, 5, 8.

[0051] The cooling pipeline 4 for conveying cooling medium is usually located on one side or opposite sides of the cooling beam structure 1. To adapt to the cooling pipeline 4 in different installation positions, the flow channel inlet 13 and the flow channel outlet 14 are optionally arranged on one side or opposite sides of the cooling beam structure 1.

[0052] Optionally, the cooling flow channel 12 is arranged on one side or opposite sides of the hollow chamber 11. The battery module is usually located on one side or opposite sides of the cooling beam structure 1. The cooling flow channel 12 arranged on one side or opposite sides of the cooling beam structure 1 is beneficial to maximize the cooling efficiency. Since too many cooling flow channels 12 will affect the structural strength of the cooling beam structure 1, arranging the cooling flow channel 12 on one side or opposite sides of the cooling beam structure 1 can also minimize the impact of the cooling flow channel 12 on the structural strength of the cooling beam structure 1.

[0053] Optionally, the flow channel inlet 13 and the flow channel outlet 14 are each provided with a quick connector for detachable connection with the cooling pipeline 4. The quick connector can realize quick connection of the cooling pipeline 4 and the quick connector, and is detachable for subsequent maintenance and replacement. The cooling pipeline 4 can be automatically locked when inserted into the quick connector, which is convenient and fast to install.

[0054] The cooling beam structure 1 is a hollow beam structure including metal alloys such as aluminum profiles, structural plastics, and composite materials. The length of the cooling beam structure 1 is 500-2000mm, and the length is preferably 1000mm, 1200mm or 1500mm. The width of the cooling beam structure 1 is 10-100mm, and the width is preferably 20mm, 40mm or 60mm. The height of the cooling beam structure 1 is 100-200mm, and the height is preferably 120mm, 150mm or 170mm. The flow channel wall thickness of the cooling flow channel 12 is 1mm-10mm, and the thickness is preferably 2-5mm. The flow channel diameter of the cooling flow channel 12 is 1-20mm. The liquid cooling flow channel distribution includes two large face separation designs and two large face communication designs. The number of flow channels on one side includes 1-10, and the number is preferably 3, 4 and 5. The direction is matched with the arrangement position of the flow channel inlet 13 and the flow channel outlet 14.

[0055] The embodiment also provides a thermal management assembly, comprising the liquid cooling plate 2 and the cooling beam structure 1 described above. The cooling beam structure 1 integrates the cooling and heat dissipation functions on the basis of ensuring the structural strength of the battery pack. The cooling medium enters the cooling flow channel 12 through the flow channel inlet 13 and exchanges heat with the battery module 3, and then flows out through the flow channel outlet 14. Since the cooling beam structure 1 is an internal hollow structure, the weight of the cooling beam structure 1 is lighter, and the overall weight of the existing battery pack will not be increased. At the same time, since the cooling beam structure 1 integrates the structural beam and the liquid cooling plate 2, the thermal capacity is larger than that of the thermal management assembly using only the liquid cooling plate 2, and the cooling and heat dissipation capacity is higher in the extreme case of thermal runaway of the battery pack, thereby improving the thermal diffusion safety performance of the battery pack. The cooling beam structure 1 integrates the structural beam and the liquid cooling plate 2 in the battery pack into a functional structural member with thermal management function, reduces the number of parts, optimizes the space utilization of the battery pack, and improves the integration degree of the battery pack, thereby providing favorable conditions for the improvement of the energy density, the loadable power and the vehicle cruising range of the battery pack.

[0056] The embodiment also provides a battery pack, comprising the battery module 3 and the thermal management assembly described above. The cooling beam structure 1 integrates the cooling and heat dissipation functions on the basis of ensuring the structural strength of the battery pack. The cooling medium enters the cooling flow channel 12 through the flow channel inlet 13 and exchanges heat with the battery module 3, and then flows out through the flow channel outlet 14. Since the cooling beam structure 1 is an internal hollow structure, the weight of the cooling beam structure 1 is lighter, and the overall weight of the existing battery pack will not be increased. At the same time, since the cooling beam structure 1 integrates the structural beam and the liquid cooling plate 2, the thermal capacity is larger than that of the thermal management assembly using only the liquid cooling plate 2, and the cooling and heat dissipation capacity is higher in the extreme case of thermal runaway of the battery pack, thereby improving the thermal diffusion safety performance of the battery pack. The cooling beam structure 1 integrates the structural beam and the liquid cooling plate 2 in the battery pack into a functional structural member with thermal management function, reduces the number of parts, optimizes the space utilization of the battery pack, and improves the integration degree of the battery pack, thereby providing favorable conditions for the improvement of the energy density, the loadable power and the vehicle cruising range of the battery pack.

[0057] Optionally, the cooling beam structure 1 is a beam structure of the battery pack, which is a beam structure perpendicular to the driving direction of the battery pack, a beam structure consistent with the driving direction of the battery pack, or a beam structure around the envelope of the battery pack. It can be understood that the beam structure is a beam structure perpendicular to the driving direction of the battery pack, a beam structure consistent with the driving direction of the battery pack, or a beam structure around the envelope of the battery pack.

[0058] For the convenience of fixing the cooling beam structure 1 and the battery box, the cooling beam structure 1 is optionally provided with a fixing hole 15, and a fastener passes through the fixing hole 15 and is fixedly connected with the battery box of the battery pack. The two ends of the cooling beam structure 1 can be respectively provided with one, two or more fixing holes 15, and the fixing hole 15 can pass through the height direction or the width direction of the cooling beam structure 1. The fastener can be a bolt, which is convenient to obtain and low in cost. In addition, the mounting and fixing mode of the cooling beam structure 1 can be adapted according to the overall design, and a screwing or nesting mode can be adopted.

[0059] The embodiment also provides a vehicle comprising the above battery pack, on the basis of guaranteeing the structural strength of the battery pack, the cooling beam structure 1 integrates the cooling and heat dissipation functions, the cooling medium enters the cooling flow channel 12 through the flow channel inlet 13 and exchanges heat with the battery module 3, and then flows out through the flow channel outlet 14. Since the cooling beam structure 1 is an internal hollow structure, the weight of the cooling beam structure 1 is relatively light, and the overall weight of the existing battery pack is not increased. At the same time, since the cooling beam structure 1 integrates the structural beam and the liquid cooling plate 2, the heat capacity of the thermal management assembly is larger than that of the liquid cooling plate 2, the cooling and heat dissipation capacity is higher in the extreme case of thermal runaway of the battery pack, and the thermal diffusion safety performance of the battery pack is improved. The cooling beam structure 1 integrates the structural beam and the liquid cooling plate 2 in the battery pack into a functional structural member with a thermal management function, reduces the number of parts, optimizes the space utilization of the battery pack, improves the integration degree of the battery pack, and provides favorable conditions for the improvement of the energy density, the loadable power of the battery pack and the vehicle cruising range.

[0060] It should be noted that the above is only a preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. Cooling beam structure, characterized in that, The cooling beam structure is provided with a hollow chamber (11), a cooling flow channel (12), a flow channel inlet (13) and a flow channel outlet (14), the cooling flow channel (12) is located at the outer peripheral side of the hollow chamber (11), the flow channel inlet (13) and the flow channel outlet (14) penetrate the surface of the cooling beam structure respectively, the cooling flow channel (12) is independent of the hollow chamber (11), the flow channel inlet (13) communicates with the flow channel outlet (14) through the cooling flow channel (12), and the cooling flow channel (12) circulates a cooling medium for heat exchange with the battery module (3).

2. The cooling beam structure according to claim 1, characterized in that The cooling beam structure is provided with a reinforcing rib (16), one side of the reinforcing rib (16) is suspended in the hollow chamber (11), and the other side of the reinforcing rib (16) is connected to the side wall of the hollow chamber (11); and / or, the hollow chamber (11) is provided with a support (17), one end of the support (17) abuts against a first side wall of the hollow chamber (11), and the other end of the support (17) abuts against a second side wall of the hollow chamber (11), and the first side wall and the second side wall are oppositely arranged.

3. The cooled beam structure of claim 1, wherein, The side wall of the cooling flow channel (12) is provided with a plurality of parallel branch flow channels (121), and the branch flow channels (121) communicate with the cooling flow channel (12).

4. Cooling beam structure according to any of claims 1-3, characterized in that The flow channel inlet (13) and the flow channel outlet (14) are arranged on one side or opposite sides of the cooling beam structure.

5. Cooling beam structure according to any of claims 1-3, characterized in that, The cooling flow channel (12) is arranged on one side or opposite sides of the hollow chamber (11).

6. A thermal management assembly characterized by, The cooling beam structure comprises a liquid cooling plate (2) and any one of claims 1-5.

7. A battery pack, characterized by The thermal management assembly comprises a battery module (3) and claim 6.

8. The battery pack of claim 7, wherein, The cooling beam structure is a beam structure, a longitudinal beam structure or an edge beam structure of the battery pack.

9. The battery pack of claim 7, wherein, The cooling beam structure is provided with a fixing hole (15), and a fastener penetrates through the fixing hole (15) and is fixedly connected with a battery box of the battery pack.

10. Vehicle, characterized in that The battery pack comprises any one of claims 7-9. The battery pack comprises any one of claims 7-9.

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