Efficient liquid cooling box body structure for heat dissipation of battery pack

Abstract

The utility model relates to an efficient liquid cooling box body structure for heat dissipation of a battery pack, the box body structure comprises a first frame body, a second frame body and a first connecting piece, and the first frame body is connected with the second frame body through the first connecting piece; the box body structure further comprises a third frame body and second connecting pieces, and the two ends of the third frame body are connected to the first frame body through the second connecting pieces respectively. Through collaborative design of the first frame body, the second frame body and the third frame body, a multi-layer distributed flow channel system formed by the first flow channel, the second flow channel, the fourth flow channel and the fifth flow channel is constructed, and multi-direction three-dimensional heat dissipation of the box body is covered. Compared with a traditional single-layer liquid cooling plate, the novel box body structure has the advantages that the cooling contact area is increased, the problem of heat accumulation can be effectively solved, the influence of multiple thermal resistance interfaces is remarkably reduced, and the heat transfer efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery thermal management technology, and in particular to a high-efficiency liquid-cooled housing structure for battery pack heat dissipation. Background Technology

[0002] With the continuous increase in the requirements for energy density and charging / discharging power of power batteries in new energy vehicles and energy storage systems, the problem of heat accumulation in lithium battery packs under high-rate operating conditions is becoming increasingly prominent. Experimental data shows that when the operating temperature of lithium batteries exceeds 45°C, their cycle life will decline exponentially, and if the local temperature reaches above 80°C, it may cause safety hazards such as thermal runaway.

[0003] Existing battery pack liquid cooling systems employ a separate design from the battery housing. The housing itself lacks liquid cooling or only has a single-layer liquid cooling plate structure, resulting in cooling and heat dissipation from only one side. Multiple thermal resistance interfaces exist between the cooling medium flow channels and the battery modules, leading to low heat transfer efficiency and high temperatures at the center of the housing, hindering efficient heat dissipation. This thermal management performance is insufficient to meet the thermal management requirements of next-generation high-energy-density battery packs. Furthermore, the separate structure increases system size and weight, contradicting the trend towards lightweight battery pack design. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a high-efficiency liquid-cooled housing structure for battery pack heat dissipation, so as to solve one or more problems in the prior art.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A high-efficiency liquid-cooled housing structure for heat dissipation of a battery pack is disclosed. The housing structure includes a first frame, a second frame, and a first connector. The first frame and the second frame are connected via the first connector. The housing structure also includes a third frame and a second connector. Both ends of the third frame are respectively connected to the first frame via the second connector.

[0007] Furthermore, the first frame and the second frame are spaced apart and enclosed to form a rectangle; the box structure also includes a bottom plate, which is closed on one side of the end face enclosed by the first frame and the second frame.

[0008] Furthermore, the third frame is perpendicular to the first frame, and the end of the third frame is located at the center of the length direction of the first frame.

[0009] Furthermore, four first flow channels distributed in a first direction are provided along the length direction within the first frame.

[0010] Furthermore, four second flow channels distributed in the first direction are provided along the length direction within the second frame.

[0011] Furthermore, the first connector is arranged at a right angle, and a sealing element is provided on the surface at the end connection with the first frame and the second frame; a third flow channel is formed inside the first connector.

[0012] Furthermore, within the first plane, both the first flow channel and the second flow channel are connected through the third flow channel.

[0013] Furthermore, a sealing plate is provided within the third frame, and four fourth flow channels and four fifth flow channels distributed along the first direction are respectively provided on both sides of the sealing plate along the length direction within the third frame; the fourth flow channels are not connected at the end near the sealing plate, and the fifth flow channels are connected at the end near the sealing plate.

[0014] Furthermore, the housing structure also includes a water inlet / outlet device, which is connected to the third frame; the water inlet / outlet device includes an inlet section and an outlet section distributed along a first direction, and is respectively connected to the two fourth channels corresponding to the first direction.

[0015] Furthermore, the second connector has four openings; on the first plane, the fourth flow channel and the fifth flow channel are connected to the first flow channel of the adjacent first frame via the openings.

[0016] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0017] (i) This novel design, through the collaborative design of the first, second, and third frames, constructs a multi-layered distributed flow channel system consisting of a first, second, fourth, and fifth flow channel, covering multi-directional three-dimensional heat dissipation of the enclosure. Compared to traditional single-layer liquid cooling plates, the novel enclosure structure increases the cooling contact area, effectively solving the problem of heat accumulation, significantly reducing the influence of multiple thermal resistance interfaces, and improving heat transfer efficiency.

[0018] (ii) This new type of modular frame connection structure, formed by the first frame, the second frame, the third frame, the first connector and the second connector, supports the segmented manufacturing and assembly of the flow channel system, adapts to the battery pack space layout requirements of different vehicle models, and is convenient to assemble while having good adaptability. Attached Figure Description

[0019] Figure 1 A three-dimensional structural view of a high-efficiency liquid-cooled housing structure for heat dissipation of a battery pack, according to an embodiment of the present invention, is shown.

[0020] Figure 2The diagram shows a top view of a high-efficiency liquid-cooled housing structure for heat dissipation of a battery pack according to an embodiment of the present invention.

[0021] Figure 3 The diagram shows a cross-sectional view along the AA direction of a high-efficiency liquid-cooled housing structure for heat dissipation of a battery pack according to an embodiment of the present invention.

[0022] Figure 4 The diagram shows a cross-sectional view along the BB direction of a high-efficiency liquid-cooled housing structure for heat dissipation of a battery pack according to an embodiment of the present invention.

[0023] Figure 5 This diagram shows a cross-sectional view along the CC direction of a high-efficiency liquid-cooled housing structure for heat dissipation of a battery pack according to an embodiment of the present invention.

[0024] Figure 6 This diagram shows a schematic representation of the first connecting member of a high-efficiency liquid-cooled housing structure for heat dissipation of a battery pack according to an embodiment of the present invention.

[0025] Figure 7 This diagram shows a schematic representation of the second connector of a high-efficiency liquid-cooled housing structure for heat dissipation of a battery pack according to an embodiment of the present invention.

[0026] Figure 8 This diagram illustrates the internal flow of a high-efficiency liquid-cooled housing structure for heat dissipation of a battery pack, according to an embodiment of the present invention.

[0027] The following are labels in the attached diagram: 1. First frame; 11. First flow channel; 2. Second frame; 21. Second flow channel; 3. First connector; 31. Sealing element; 32. Third flow channel; 4. Third frame; 41. Sealing plate; 42. Fourth flow channel; 43. Fifth flow channel; 5. Second connector; 51. Port; 6. Inlet / outlet device; 61. Inlet section; 62. Outlet section; 7. Base plate. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description of a high-efficiency liquid-cooled housing structure for battery pack heat dissipation, in conjunction with the accompanying drawings and specific embodiments, provides further clarification. The advantages and features of this utility model will become clearer from the following description. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, used only to facilitate and clearly illustrate the purpose of the embodiments of this utility model. Please refer to the accompanying drawings to make the objectives, features, and advantages of this utility model more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0029] Please see Figures 1 to 7 The high-efficiency liquid-cooled housing structure for battery pack heat dissipation in this embodiment includes a first frame 1, a second frame 2, and a first connector 3. The first frame 1 and the second frame 2 are connected via the first connector 3. The first frame 1 and the second frame 2 are spaced apart and enclosed to form a rectangle, i.e., two first frame 1s and two second frame 2s are arranged opposite each other. The housing structure also includes a bottom plate 7, which is closed on one side of the end face enclosed by the first frame 1 and the second frame 2. In this embodiment, the bottom plate 7 is referred to as the bottom of the housing structure.

[0030] Furthermore, the housing structure also includes a third frame 4 and a second connector 5, with both ends of the third frame 4 connected to the first frame 1 via the second connector 5. The third frame 4 is perpendicular to the first frame 1, and the end of the third frame 4 is located at the center of the length direction of the first frame 1, thereby ensuring the uniformity of liquid cooling flow distribution.

[0031] Furthermore, four first flow channels 11 distributed in a first direction are provided along the length direction within the first frame 1. Four second flow channels 21 distributed in the first direction are provided along the length direction within the second frame 2. In this embodiment, the first direction is perpendicular to the end face of the base plate 7.

[0032] Furthermore, the first connector 3 is arranged at a right angle, and a sealing element 31 is provided on the surface where it connects with the ends of the first frame 1 and the second frame 2. A third flow channel 32 is formed within the first connector 3. In the first plane, the first flow channel 11 and the second flow channel 21 are connected through the third flow channel 32. The sealing element 31 effectively ensures the sealing of the liquid flow between the first flow channel 11, the third flow channel 32, and the second flow channel 21, thereby improving the liquid cooling effect. In this embodiment, the first plane is a plane parallel to the end face of the base plate 7, which means that the four first flow channels 11 and the four second flow channels 21 are connected in the first direction. Each connected first flow channel 11 and second flow channel 21 is flush with the first plane to ensure smooth liquid flow.

[0033] Furthermore, a sealing plate 41 is provided inside the third frame 4, and four fourth flow channels 42 and four fifth flow channels 43 distributed along the first direction are respectively provided on both sides of the sealing plate 41 along the length direction inside the third frame 4. The fourth flow channels 42 are not connected at the end near the sealing plate 41, and the fifth flow channels 43 are connected at the end near the sealing plate 41.

[0034] Furthermore, the housing structure also includes a water inlet / outlet device 6, which is connected to the third frame 4. The water inlet / outlet device 6 includes an inlet section 61 and an outlet section 62 distributed along a first direction, and is respectively connected to two corresponding fourth channels 42 in the first direction. Specifically, the inlet section 61 is connected to the two fourth channels 42 away from the bottom plate 7 (i.e., the top), while the outlet section 62 is connected to the two fourth channels 42 near the bottom plate 7 (i.e., the bottom).

[0035] Furthermore, the second connector 5 has four openings 51. On the first plane, the fourth flow channel 42 and the fifth flow channel 43 are connected to the first flow channel 11 of the adjacent first frame 1 through the openings 51, which means that the fourth flow channel 42, the fifth flow channel 43 and the first flow channel 11 are flush with the first plane, ensuring smooth liquid flow.

[0036] Please continue reading. Figure 8This is a schematic diagram of the fluid flow in the box structure of this embodiment. Specifically, the fluid enters the two top fourth flow channels 42 from the inlet section 61, then flows from the middle to both ends of the first frame 1 through the two connected top first flow channels 11, then flows through the two top second flow channels 21 of the second frames 2 on both sides, then converges from both ends of the two top first flow channels 11 of the opposing first frames 1 towards the center, then flows through the two top fifth flow channels 43 to the two bottom fifth flow channels 43, then flows from the middle to both ends through the two bottom first flow channels 11 connected to the fifth flow channels 43, then flows through the two bottom second flow channels 21 of the second frames 2 on both sides, then converges from both ends to the middle through the two bottom first flow channels 11 of the other first frame 1, and finally flows into the outlet section 62 through the two bottom fourth flow channels 42 of the third frame 4, forming a cycle in sequence.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A high-efficiency liquid-cooled housing structure for heat dissipation of a battery pack, characterized in that: The box structure includes a first frame, a second frame, and a first connector, wherein the first frame and the second frame are connected via the first connector; the box structure also includes a third frame and a second connector, wherein both ends of the third frame are connected to the first frame via the second connector.

2. The high-efficiency liquid-cooled housing structure for battery pack heat dissipation as described in claim 1, characterized in that: The first frame and the second frame are spaced apart and enclose each other to form a rectangle; the box structure also includes a bottom plate, which is closed on one side of the end face enclosed by the first frame and the second frame.

3. The high-efficiency liquid-cooled housing structure for battery pack heat dissipation as described in claim 2, characterized in that: The third frame is perpendicular to the first frame, and the end of the third frame is located at the center of the length direction of the first frame.

4. The high-efficiency liquid-cooled housing structure for battery pack heat dissipation as described in claim 3, characterized in that: Four first flow channels are arranged along the length direction within the first frame.

5. The high-efficiency liquid-cooled housing structure for battery pack heat dissipation as described in claim 4, characterized in that: The second frame has four second flow channels distributed in the first direction along its length.

6. The high-efficiency liquid-cooled housing structure for battery pack heat dissipation as described in claim 5, characterized in that: The first connector is arranged at a right angle, and a sealing element is provided on the surface where it connects with the ends of the first frame and the second frame; a third flow channel is formed inside the first connector.

7. The high-efficiency liquid-cooled housing structure for battery pack heat dissipation as described in claim 6, characterized in that: In the first plane, both the first flow channel and the second flow channel are connected through the third flow channel.

8. The high-efficiency liquid-cooled housing structure for battery pack heat dissipation as described in claim 7, characterized in that: A sealing plate is provided in the third frame. Four fourth channels and four fifth channels are respectively provided on both sides of the sealing plate along the length direction of the third frame. The fourth channels are not connected at the end near the sealing plate, and the fifth channels are connected at the end near the sealing plate.

9. The high-efficiency liquid-cooled housing structure for heat dissipation of a battery pack as described in claim 8, characterized in that: The housing structure also includes a water inlet / outlet device, which is connected to the third frame. The water inlet / outlet device includes an inlet section and an outlet section distributed along a first direction, and is respectively connected to the two fourth channels corresponding to the first direction.

10. The high-efficiency liquid-cooled housing structure for battery pack heat dissipation as described in claim 9, characterized in that: The second connector has four openings; on the first plane, the fourth flow channel and the fifth flow channel are connected to the first flow channel of the adjacent first frame through the openings.

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