Heat dissipation device, battery pack and vehicle

Abstract

The utility model relates to the technical field of battery heat dissipation, and discloses a heat dissipation device, a battery pack and a vehicle, the heat dissipation device comprises a battery box body and a heat dissipation plate; the battery box body comprises a large panel, a side panel and a bottom panel; the number of the large panels is multiple. The multiple large panels are arranged on one side of the bottom panel side by side, and the large panels are filled with phase change materials; the side panel is arranged in the bottom panel and on the same side with the large panel; the two adjacent large panels, the side panels and the bottom panel form a cavity for accommodating a battery cell; the heat dissipation plate is arranged on the other side, where the large panel is not arranged, of the bottom panel. According to the utility model, the large panel is arranged on the large surface of the battery cell, and the phase-change material is filled in the large panel, so that the whole temperature of the battery cell is uniform, and the temperature uniformity is good; the heat dissipation plate at the bottom is combined to take away heat in the phase change material, so that the heat dissipation effect on the battery cell can be ensured, and the temperature control effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of battery heat dissipation, and in particular to a heat dissipation device, a battery pack and a vehicle. Background Art

[0002] The battery packs (Packs) carried by general electric vehicles are generally assembled from cells (Cells). The CTP (Cell to Pack) structure is a new battery structure that reduces or eliminates the battery pack (Module) link and directly installs the cells into the battery pack to improve the space utilization of the battery pack.

[0003] However, this compact structure can easily affect the heat dissipation of the battery, especially during the supercharging process, when the battery generates a lot of heat. Heat accumulation can cause the battery to overheat, thus affecting battery performance, life, and safety. Utility Model Content

[0004] In view of this, the utility model provides a heat dissipation device, a battery pack and a vehicle to solve or improve the problem of poor heat dissipation of the battery pack.

[0005] In a first aspect, the utility model provides a heat dissipation device, comprising: a battery box and a heat dissipation plate; the battery box comprises: a large panel, a side panel and a bottom panel; the number of the large panels is multiple;

[0006] A plurality of the large panels are arranged side by side on one side of the bottom panel, and the large panels are filled with phase change material;

[0007] The side panel is arranged on the same side of the bottom panel as the large panel; the two adjacent large panels, the side panel and the bottom panel form a cavity for accommodating the battery cell;

[0008] The heat dissipation plate is arranged on the other side of the bottom panel where the large panel is not arranged.

[0009] In some optional embodiments, the large panel is a profile structure with a cavity, and the cavity of the large panel is filled with a phase change material;

[0010] Alternatively, the large panel includes a substrate having a plurality of holes, and phase change material is solidified in the holes of the substrate.

[0011] In some optional embodiments, the side panel and the bottom panel are both profile structures with cavities;

[0012] The cavity of the side panel is filled with a phase change material; and / or the cavity of the bottom panel is filled with a phase change material.

[0013] In some optional embodiments, reinforcing ribs are provided inside the side panels and the bottom panel.

[0014] In some optional embodiments, the heat dissipation plate includes a heat dissipation duct.

[0015] In some optional embodiments, the disposing direction of the heat dissipation duct is consistent with the moving direction of the heat dissipation device.

[0016] In some optional embodiments, the distance between two adjacent large panels is consistent with the thickness of the battery cell.

[0017] In some optional embodiments, the battery box further includes a box side plate;

[0018] The box side panels are arranged parallel to the large panel.

[0019] In a second aspect, the utility model provides a battery pack, comprising a battery cell and a heat dissipation device according to the first aspect or any corresponding embodiment thereof; the battery cell is arranged in a cavity of the heat dissipation device.

[0020] In a third aspect, the utility model provides a vehicle, comprising a battery pack according to the second aspect or any corresponding embodiment thereof.

[0021] In this embodiment, a large panel is provided for the large surface of the battery cell, and a phase change material is filled in the large panel. By utilizing the characteristic that the temperature of the phase change material remains unchanged during the phase change process, the battery cell can be cooled over a large area, and the overall temperature of the battery cell can be ensured to be uniform and have good temperature uniformity. Combined with the heat dissipation plate at the bottom to take away the heat in the phase change material, the heat dissipation effect of the battery cell can be ensured, and the temperature control effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 This is a structural schematic diagram of a heat dissipation device according to an embodiment of the utility model;

[0024] Figure 2 It is a structural schematic diagram of a battery pack according to an embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 10. Battery box; 20. Heat sink; 30. Battery cell; 101. Large panel; 102. Side panel; 103. Box side panel. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be understood that terms indicating orientation or positional relationships, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, in order to better illustrate the utility model, numerous specific details are given in the specific embodiments below. It should be understood by those skilled in the art that the utility model can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the main purpose of the utility model.

[0032] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] Battery packs generally use a bottom-cooling solution, with matching coolant pipes, cold plates, coolant, etc. at the bottom of the battery. The battery's thermal management system is implemented by controlling the temperature and flow of the coolant at the bottom cold plate inlet. The cold plate inlet requires an additional external heat pump to provide cooling or heating power and the pressure required for the coolant flow. This thermal management hardware system is complex, the hardware cost is high, the entire thermal management system is heavy, and the cooling process also requires additional consumption of more electricity; in addition, due to the short current supercharging time (10 minutes or less), the amount of heat that can be removed by liquid cooling is limited, and it is also easy to cause a large temperature difference inside the battery cell.

[0034] An embodiment of the utility model provides a heat dissipation device, which sets a large panel for the large surface of the battery core and fills the large panel with phase change material. The large surface of the battery core is cooled and the temperature is controlled by utilizing the characteristic that the temperature of the phase change material remains unchanged during the phase change process, and the heat is dissipated in combination with the heat dissipation plate at the bottom to ensure that the temperature of the battery core remains uniform and constant.

[0035] Figure 1 A schematic diagram of the structure of the heat dissipation device is shown in FIG. Figure 1 As shown, the heat dissipation device includes: a battery box 10 and a heat dissipation plate 20; the battery box 10 includes: a large panel 101, a side panel 102 and a bottom panel; the number of large panels 101 is multiple. The bottom panel is located at the bottom of the entire battery box 10, Figure 1 Not shown in FIG.

[0036] Among them, a plurality of large panels 101 are arranged side by side on one side of the bottom panel, and the large panels 101 are filled with phase change materials; the side panel 102 is arranged on the same side of the bottom panel as the large panels 101; Figure 1 As shown, the large panel 101 and the side panel 102 are both arranged on the upper side of the bottom panel. In addition, the two adjacent large panels 101, the side panel 102 and the bottom panel form a cavity for accommodating the battery cell 30. The heat sink 20 is arranged on the other side of the bottom panel.

[0037] like Figure 1 As described above, a plurality of large panels 101 are provided on the upper side of the bottom panel, and the large panels 101 are used to dissipate heat from the large surface (the surface with the largest area) of the battery cell 30, and the plurality of large panels 101 are arranged side by side, so that the battery cell 30 can be arranged in the space between two large panels 101. For details on the arrangement position of the battery cell 30, see Figure 2 shown.

[0038] In addition, the large panel 101 is filled with a phase change material, which may be liquid metal, paraffin or fatty acid or other organic or inorganic phase change material, which is not limited in this embodiment. When the external temperature of the phase change material changes, the phase change material will be stimulated to undergo a phase change, and during the phase change process, the temperature of the phase change material remains unchanged. By utilizing the latent heat characteristics of the phase change material, the large panel 101 can control the large surface temperature of the battery cell 30 within a specific temperature range to prevent the battery cell 30 from being overheated. In addition, the large panel 101 can achieve temperature control of most of the large surface of the battery cell 30, which can ensure good temperature uniformity inside the battery cell 30.

[0039] The side panel 102 is similar to the large panel 101 and is disposed on the same side of the bottom panel. Figure 1 As shown, the side panel 102 is arranged on the upper side of the bottom panel, and the arrangement direction of the side panel 102 is perpendicular to the arrangement direction of the large panel 101, so that the two adjacent large panels 101 and the side panel 102 and the bottom panel can form a cavity, which is used to accommodate the battery cell 30. Figure 1 As shown, a plurality of parallel large panels 101 may be provided on the side of the side panel 102, thereby forming a plurality of cavities, so that the battery box 10 can accommodate a plurality of battery cells 30. It is understood that the number of large panels 101 may be determined based on the number of battery cells 30 required.

[0040] Furthermore, a heat sink 20 is provided on the other side of the bottom panel where the large panel 101 is not provided, that is, the heat sink 20 and the large panel 101 are provided on both sides of the bottom panel respectively; Figure 1 As shown, the heat sink 20 is disposed on the lower side of the bottom panel. The heat sink 20 can dissipate heat from the battery box 10, so that the latent heat stored in the phase change material during the battery charging process (such as the supercharging process) can be dissipated into the air, ensuring the heat dissipation effect on the battery cell 30.

[0041] The heat dissipation device provided in this embodiment is provided with a large panel 101 for the large surface of the battery cell 30, and a phase change material is filled in the large panel 101. By utilizing the characteristic that the temperature of the phase change material remains unchanged during the phase change process, the battery cell 30 can be dissipated over a large area, and the overall temperature of the battery cell 30 can be ensured to be uniform and have good temperature uniformity. Combined with the heat dissipation plate at the bottom to take away the heat in the phase change material, the heat dissipation effect of the battery cell 30 can be ensured, and the temperature control effect is good.

[0042] In some optional embodiments, the spacing between two adjacent large panels 101 is consistent with the thickness of the battery cell 30, so that the large panel 101 can fit the large surface of the battery cell 30 to ensure the heat dissipation effect. In addition, during the charging process, the phase change material has fluidity after absorbing heat and changing phase. After the battery cell 30 expands, it compresses the large panel 101. Part of the phase change material in the large panel 101 flows to the bottom and side, which can effectively release the expandable space, so that the expansion force of the battery cell 30 during the supercharging process is more uniform. In the case of not setting a circular frame, the large panel 101 can be used to absorb the expansion of the battery cell 30.

[0043] Optionally, the large panel 101 may be a profile structure with a cavity, and the cavity of the large panel 101 is filled with a phase change material. Alternatively, the large panel 101 may also include a substrate with multiple holes, and the phase change material is solidified in the holes of the substrate.

[0044] In this embodiment, the large panel 101 can be an aluminum profile with a cavity therein; for example, the large panel 101 is provided with two large aluminum plates, and a cavity is formed between the aluminum plates for filling the phase change material. Alternatively, the large panel 101 can also be a composite material; specifically, a porous medium substrate can be used as the substrate of the large panel 101, and the phase change material can be solidified in the pores of the substrate. During the supercharging process, the composite material can absorb heat and expand due to the increased fluidity of the phase change material to fill the pores of the substrate.

[0045] Optionally, both the side panel 102 and the bottom panel are profile structures with cavities; the cavity of the side panel 102 is filled with a phase change material; and / or the cavity of the bottom panel is filled with a phase change material.

[0046] In this embodiment, the side panels 102 and the bottom panel can be specifically made of aluminum profiles, and the internal cavity of the aluminum profile is filled with an appropriate amount of phase change material. Among them, the large panel 101, the side panels 102 and the bottom panel of the battery box 10 can wrap the battery cell 30, and can be attached to the large surface, side surface and bottom surface of the battery cell 30, with a large cooling area, which can achieve effective heat dissipation of the battery cell 30.

[0047] In addition, in addition to using the internal phase change material to dissipate heat, the side panel 102 and the bottom panel can also support the entire heat dissipation device; to improve the supporting effect, reinforcing ribs are provided inside the side panel 102 and the bottom panel.

[0048] Furthermore, if Figure 1 As shown, the battery box 10 further includes a box side plate 103, which is arranged parallel to the large panel 101. In this embodiment, the box side plate 103 is arranged at the outermost side of the large panel, which is the outer side plate of the battery box 10, and can support the battery box 10 to ensure the stability of the heat dissipation device.

[0049] In some optional embodiments, the heat sink 20 includes a heat dissipation air duct. In this embodiment, the heat sink of the heat dissipation device dissipates heat by air cooling, and is provided with one or more heat dissipation air ducts.

[0050] Optionally, the setting direction of the heat dissipation duct is consistent with the moving direction of the heat dissipation device. For example, the heat dissipation duct can extend along the thickness direction of the battery cell 30, and the two ends of the heat dissipation duct form an air inlet and an air outlet respectively. In addition, when the heat dissipation device is installed on an electrical device such as a vehicle, it is movable, and its moving direction is the driving direction of the electrical device such as the vehicle. The direction of the heat dissipation duct is set to the moving direction, so that when the vehicle moves, natural wind can be used to achieve air cooling, without the need for an additional heat pump, with a simple structure, low hardware cost, and no need to consume electricity during the cooling process.

[0051] The utility model also provides a battery pack, such as Figure 2 As shown, the battery pack includes a battery cell 30 and any heat dissipation device as described above; the battery cell 30 is arranged in the cavity of the heat dissipation device.

[0052] An embodiment of the utility model further provides a vehicle, which includes a battery pack as provided in the above embodiment, and the battery pack serves as a power battery of the vehicle.

[0053] The battery pack and vehicle provided in this embodiment have a battery box 10 that can fully enclose the battery cell 30, and a phase change material is provided inside, so the cooling area is large and the temperature uniformity is good; the large panel 101 can absorb the expansion of the battery cell 30 during the charging process, so that the expansion force of the battery cell is more uniform. An air cooling channel is left at the bottom to dissipate heat naturally, and the cooling process does not consume electricity. The structure is simple and the hardware cost is low.

[0054] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A heat dissipation device, characterized in that: include: A battery box (10) and a heat sink (20); the battery box (10) comprises: a large panel (101), a side panel (102) and a bottom panel; the number of the large panels (101) is multiple; A plurality of the large panels (101) are arranged side by side on one side of the bottom panel, and the large panels (101) are filled with phase change material; The side panel (102) is arranged on the same side of the bottom panel as the side on which the large panel (101) is arranged; the two adjacent large panels (101), the side panel (102) and the bottom panel form a cavity for accommodating the battery cell (30); The heat dissipation plate (20) is arranged on the other side of the bottom panel where the large panel (101) is not arranged.

2. The heat dissipation device according to claim 1, characterized in that: The large panel (101) is a profile structure with a cavity, and the cavity of the large panel (101) is filled with a phase change material; Alternatively, the large panel (101) comprises a substrate having a plurality of holes, and phase change material is solidified in the holes of the substrate.

3. The heat dissipation device according to claim 2, characterized in that: The side panel (102) and the bottom panel are both profile structures with cavities; The cavity of the side panel (102) is filled with a phase change material; and / or the cavity of the bottom panel is filled with a phase change material.

4. The heat dissipation device according to claim 3, characterized in that: Reinforcing ribs are provided inside the side panels (102) and the bottom panel.

5. The heat dissipation device according to claim 1, characterized in that: The heat dissipation plate (20) comprises a heat dissipation air duct.

6. The heat dissipation device according to claim 5, characterized in that: The setting direction of the heat dissipation duct is consistent with the moving direction of the heat dissipation device.

7. The heat dissipation device according to claim 1, characterized in that: The distance between two adjacent large panels (101) is consistent with the thickness of the battery cell (30).

8. The heat dissipation device according to claim 1, characterized in that: The battery box (10) further includes a box side plate (103); The box side panels (103) are arranged parallel to the large panel (101).

9. A battery pack, characterized in that: comprising a battery core (30) and a heat dissipation device as claimed in any one of claims 1 to 8; The battery core (30) is arranged in the cavity of the heat dissipation device.

10. A vehicle, characterized in that: Comprising the battery pack as claimed in claim 9.

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