Battery box, battery pack, and electric device

Abstract

The utility model belongs to battery technical field discloses a kind of battery box, battery pack and electric device, the battery box includes box body and first cold plate, first cold plate is along transverse arrangement and box body is divided into upper battery cavity and lower battery cavity, upper battery cavity and lower battery cavity all have multiple battery group placement site;Among them, reinforcing beam is arranged in lower battery cavity, and the upper end surface of reinforcing beam and the lower surface of first cold plate have interval. Through the technical scheme provided in the application, the heat exchange problem between the upper battery cavity and the lower battery cavity in the related art can be at least solved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a battery box, a battery pack, and an electrical device. Background Technology

[0002] A battery pack is used to store and supply electrical energy. It typically consists of several battery modules, connectors, a battery management system (BMS), a cooling system, electrical interfaces, and a casing. The main function of a battery pack is to integrate multiple battery modules into a single unit. Battery modules are connected in parallel or series to increase the voltage, capacity, or power of the battery system.

[0003] In related technologies, to meet the needs of some high-capacity scenarios, a double-layer battery pack structure is designed, consisting of an upper battery compartment and a lower battery compartment. Each battery compartment can simultaneously accommodate multiple battery packs to power the device.

[0004] However, there is a significant heat exchange problem between the upper and lower battery cavities in the related technologies, resulting in uneven heat dissipation within the upper and lower battery cavities. Utility Model Content

[0005] This invention provides a battery box, a battery pack, and an electrical device, which can at least solve the problem of significant heat exchange between the upper and lower battery cavities in related technologies.

[0006] According to one aspect of the present invention, a battery housing is provided, the battery housing including a housing body and a first cold plate, the first cold plate being arranged laterally and dividing the housing body into an upper battery cavity and a lower battery cavity, both the upper battery cavity and the lower battery cavity having multiple battery pack placement positions; wherein, a reinforcing beam is provided in the lower battery cavity, and there is a gap between the upper end surface of the reinforcing beam and the lower surface of the first cold plate.

[0007] According to another aspect of the present invention, a battery pack is provided, the battery pack including a battery housing and a battery pack, the battery pack being disposed in the battery pack placement position of the battery housing, and the battery housing being the battery housing provided above.

[0008] According to another aspect of the present invention, an electrical device is provided, the electrical device including a battery pack, the battery pack being the battery pack provided above.

[0009] By applying the technical solution of this utility model, the first cold plate can cool the battery pack, and the reinforcing beam can improve the structural strength of the lower battery cavity. Furthermore, because there is a gap between the upper surface of the reinforcing beam and the lower surface of the first cold plate, this gap can prevent heat conduction through direct contact between the reinforcing beam and the first cold plate, thereby improving the heat exchange between the upper and lower battery cavities. Moreover, the above structure can also improve the heat dissipation uniformity of the battery pack, effectively reduce the battery pack temperature, extend its service life, and improve safety. Attached Figure Description

[0010] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0011] Figure 1 A schematic diagram of the battery box provided in an embodiment of the present invention is shown;

[0012] Figure 2 A partial cross-sectional view of the battery box provided in an embodiment of the present invention is shown.

[0013] The above figures include the following reference numerals:

[0014] 10. Main body of the casing; 11. Upper battery compartment; 12. Lower battery compartment; 13. Spacing;

[0015] 20. First cold plate;

[0016] 30. Reinforcing beam; 31. Reinforcing plate cavity;

[0017] 40. Second cold plate;

[0018] 50. Border; 51. Border cavity;

[0019] 60. Top cover. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] like Figure 1 and Figure 2As shown, this embodiment of the utility model provides a battery box, which includes a box body 10 and a first cold plate 20. The first cold plate 20 is arranged laterally and divides the box body 10 into an upper battery cavity 11 and a lower battery cavity 12. Both the upper battery cavity 11 and the lower battery cavity 12 have multiple battery pack placement positions for placing battery packs. A reinforcing beam 30 is provided inside the lower battery cavity 12, and there is a gap 13 between the upper end surface of the reinforcing beam 30 and the lower surface of the first cold plate 20.

[0022] The battery housing provided in this embodiment has a gap 13 between the upper surface of the reinforcing beam 30 and the lower surface of the first cold plate 20. This gap 13 prevents heat conduction between the reinforcing beam 30 and the first cold plate 20 through direct contact, thereby improving the heat exchange between the upper battery cavity 11 and the lower battery cavity 12. This facilitates effective and independent temperature control of the upper battery cavity 11 and the lower battery cavity 12, enabling separate heat exchange management for each cavity. Furthermore, the above structure also improves the heat dissipation uniformity of the battery pack, effectively reduces the battery pack temperature, extends its service life, and enhances safety.

[0023] It should be noted that if the reinforcing beam 30 directly contacts the first cold plate 20, it will act as a thermal bridge, causing heat to be transferred directly from the lower battery cavity 12 to the upper battery cavity 11, thus affecting the overall thermal management efficiency of the system. However, the spacing of 13 between the upper surface of the reinforcing beam 30 and the lower surface of the first cold plate 20 effectively prevents this thermal bridging effect. This allows the first cold plate 20 to focus solely on cooling the battery pack it directly contacts, without being affected by thermal interference from the reinforcing beam 30. Consequently, the system's heat exchange efficiency is higher because heat is more precisely guided and managed, avoiding unnecessary heat transfer.

[0024] in, Figure 1 The plane containing the first and second horizontal directions is called the horizontal plane, and all directions within the horizontal plane are referred to as the horizontal direction in this embodiment. In this embodiment, the first horizontal direction is the width direction of the battery box, and the second horizontal direction is the length direction of the battery box.

[0025] In this embodiment, the upper surface of the first cold plate 20 is the bottom wall of the upper battery cavity 11, and the battery pack placement position of the upper battery cavity 11 is located on the first cold plate 20.

[0026] The battery housing also includes a heat insulation component, which is located at interval 13. By filling the interval 13 between the upper end face of the reinforcing beam 30 and the lower surface of the first cold plate 20 with the heat insulation component, the heat transfer path is further blocked, the heat insulation effect is enhanced, and the heat exchange problem between the upper battery cavity 11 and the lower battery cavity 12 is further improved.

[0027] In this embodiment, the upper end of the heat insulation component is attached to the lower surface of the first cold plate 20, and the lower end of the heat insulation component is attached to the upper surface of the reinforcing beam 30, so that the heat insulation component can play a role in heat insulation.

[0028] The heat insulation component includes heat-insulating adhesive, which connects the reinforcing beam 30 and the first cold plate 20. Utilizing the high thermal resistance of the adhesive, a stable thermal insulation layer is formed between the reinforcing beam 30 and the first cold plate 20, maintaining good thermal insulation even under extreme temperature conditions. This structure not only improves the thermal management performance of the battery box but also enhances the stability of the internal structure of the battery box by connecting the reinforcing beam 30 and the first cold plate 20 with the heat-insulating adhesive, reducing mechanical stress caused by temperature changes.

[0029] It should be noted that heat insulation adhesive refers to an adhesive layer that can insulate against heat, mainly used to reduce heat transfer.

[0030] Furthermore, the heat insulation component is made of an elastic material, which allows it to form an insulating layer between the reinforcing beam 30 and the first cold plate 20 that has both thermal insulation function and vibration absorption function, thereby reducing or eliminating the impact of external vibration on the battery pack, improving the seismic performance of the battery box, and extending the service life of the battery pack.

[0031] Specifically, the materials of the thermal insulation components include, but are not limited to, silicone rubber, polyurethane, thermoplastic elastomers, and aerogel composites.

[0032] In this embodiment, the height of the interval 13 is D, where 20mm ≤ D ≤ 35mm. Setting the interval 13 between the upper end face of the reinforcing beam 30 and the lower surface of the first cold plate 20 within the above-mentioned height range provides sufficient heat insulation space to ensure heat insulation performance without excessively increasing the height of the battery box.

[0033] Furthermore, the 20mm to 35mm interval 13 forms a buffer zone, which can provide additional shock absorption space when the battery box is subjected to external impact, reduce the direct impact force on the first cold plate 20, and thus protect the battery pack and the first cold plate 20 from damage.

[0034] The height of interval 13 can be 20mm, 25mm, 30mm, 35mm, or any other value between 20mm and 35mm.

[0035] like Figure 1 and Figure 2As shown, in this embodiment, the battery housing also includes a second cold plate 40 arranged laterally, which is parallel to the first cold plate 20. A reinforcing beam 30 is disposed on the second cold plate 40. The second cold plate 40 cools the battery pack in the lower battery cavity 12, while the reinforcing beam 30 provides support and reinforcement, and does not directly contact the first cold plate 20 to avoid heat conduction.

[0036] In this embodiment, the upper surface of the second cold plate 40 is the bottom wall of the lower battery cavity 12, and the second cold plate 40 has a better cooling effect on the battery pack in the lower battery cavity 12.

[0037] Specifically, by equipping the upper battery cavity 11 and the lower battery cavity 12 with independent heat exchange elements, namely a first cold plate 20 and a second cold plate 40, this design enables independent and efficient cooling of the two battery layers. The first cold plate 20 and the second cold plate 40 are in close contact with their respective battery layers, while maintaining a certain distance between them, with no direct heat exchange path. This ensures that the heat of each battery layer can be managed independently of the other. Since the first cold plate 20 is only responsible for heat exchange in the upper battery cavity 11, while the second cold plate 40 is dedicated to heat dissipation in the lower battery cavity 12, this configuration allows the cooling system to be efficiently adjusted according to the actual needs of each battery layer. When a battery layer overheats, the cooling capacity of that layer's cold plate can be directly enhanced without considering the impact on the other battery layer, thus quickly responding and controlling the local temperature.

[0038] It should be noted that in this embodiment, the first cold plate 20 and the second cold plate 40 are both water-cooled plates. A water-cooled plate is a device that achieves battery thermal management through water circulation. Its basic working principle is to use the high specific heat capacity and excellent thermal conductivity of water to remove the heat generated by the battery pack during operation, so as to keep the battery pack working within a suitable temperature range.

[0039] like Figure 1 and Figure 2 As shown, in this embodiment, the battery housing also includes a vertically arranged frame 50. The edges of the first cold plate 20 and the second cold plate 40 are respectively connected to the frame. The frame 50, the second cold plate 40, and the first cold plate 20 together form the lower battery cavity 12. Connecting the edges of the first cold plate 20 and the second cold plate 40 to the frame can limit the position of the first cold plate 20 and the second cold plate 40. Compared with using an additional frame to fix the first cold plate 20 and the second cold plate 40, this method has the advantages of simple structure and low cost, thereby simplifying the assembly structure of the first cold plate 20 and the second cold plate 40 and improving the assembly efficiency of the first cold plate 20 and the second cold plate 40.

[0040] Furthermore, the combination of the frame 50, the second cold plate 40, and the first cold plate 20 forms a closed and stable lower battery cavity 12. The reinforcing beam 30 plays a role in reinforcement and separation, which helps to maintain the structural integrity of the battery box, improves the mechanical strength and sealing performance of the battery box, and reduces the impact of external environmental factors on the battery pack.

[0041] In this embodiment, the reinforcing beam 30 is connected to the frame 50 at both ends in the lateral direction, forming a more robust frame structure. This design is similar to the crossbeams of a bridge, improving the compressive strength and rigidity of the entire box structure by distributing and bearing the load in the horizontal direction.

[0042] The frame 50 has a frame cavity 51. By setting the frame cavity 51, the weight of the frame 50 can be reduced, which helps to make the battery pack lighter, and the heat insulation effect of the frame 50 can also be improved.

[0043] like Figure 1 and Figure 2 As shown, in this embodiment, the reinforcing beam 30 is a vertically arranged reinforcing plate with a reinforcing plate cavity 31. The reinforcing plate extends in a first transverse direction to separate the lower battery cavity 12 in a second transverse direction, and the first and second transverse directions are arranged at an angle. By adopting the above structure, the reinforcing plate cavity 31 can reduce the weight of the reinforcing beam 30 while ensuring its structural strength.

[0044] The lower battery cavity 12 is provided with multiple reinforcing beams 30, which divide the lower battery cavity 12 into multiple sub-battery cavities, thereby further improving the structural strength of the battery box and improving the thermal management accuracy of the lower battery cavity 12.

[0045] like Figure 1 As shown, the battery housing also includes an upper cover 60, which covers the first cold plate 20. The upper cover 60 and the first cold plate 20 together form the upper battery cavity 11. Through the cooperation of the upper cover 60 and the first cold plate 20, a closed and stable upper battery cavity 11 is constructed, which helps to protect the upper battery pack from the influence of external environmental factors, improves the sealing performance of the battery housing, and avoids the battery pack from external impacts.

[0046] Another embodiment of this utility model provides a battery pack, which includes a battery housing and a battery pack. The battery pack is disposed in the battery pack placement position of the battery housing, and the battery housing is the battery housing provided above. Therefore, this battery pack can also improve the heat exchange problem between the upper battery cavity 11 and the lower battery cavity 12, making it easier to achieve effective and independent temperature control of the upper battery cavity 11 and the lower battery cavity 12, thereby realizing separate heat exchange management for the upper battery cavity 11 and the lower battery cavity 12.

[0047] It's important to note that a battery pack is used to store and provide electrical energy. A battery pack typically consists of several battery cells, connectors, a Battery Management System (BMS), a cooling system, electrical interfaces, and a casing. The main function of a battery pack is to integrate multiple battery cells into a single unit. Battery cells are connected in parallel or series to increase the voltage, capacity, or power of the battery system. A battery pack is composed of multiple individual battery cells (cells), which are the core component of the battery pack and the basic unit for storing and releasing electrical energy. By combining multiple cells into a battery pack, the battery capacity requirements of different devices can be met, achieving high-capacity battery packs.

[0048] Another embodiment of this utility model provides an electrical device that includes a battery pack, which is the battery pack provided above. Therefore, this electrical device can also improve the heat exchange problem between the upper battery cavity 11 and the lower battery cavity 12, extend the service life of the battery pack, and improve the safety of use.

[0049] Electrical devices include, but are not limited to, vehicles.

[0050] The apparatus provided by the embodiments has the following beneficial effects:

[0051] (1) By making the upper end face of the reinforcing beam 30 and the lower surface of the first cold plate 20 have a gap of 13, independent heat exchange between the upper and lower battery cavities is achieved, so that each battery cavity can obtain targeted cooling effect, thereby improving heat dissipation efficiency and overall thermal management performance.

[0052] (2) The design of the insulation component further reduces unnecessary heat conduction, thereby further improving heat dissipation efficiency and overall thermal management performance;

[0053] (3) By setting up the reinforcing beam 30, the overall structural stability and rigidity of the battery box are significantly improved, and the deformation during transportation or use is reduced, ensuring the safety of the battery pack.

[0054] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0055] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary only and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0056] In the description of this utility model, it should be understood that "multiple" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0057] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0058] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0059] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery housing, characterized in that, The battery housing includes a housing body (10) and a first cold plate (20). The first cold plate (20) is arranged in a horizontal direction and divides the housing body (10) into an upper battery cavity (11) and a lower battery cavity (12). Both the upper battery cavity (11) and the lower battery cavity (12) have multiple battery pack placement positions. The lower battery cavity (12) is provided with a reinforcing beam (30), and there is a gap (13) between the upper end surface of the reinforcing beam (30) and the lower surface of the first cold plate (20).

2. The battery housing according to claim 1, characterized in that, The battery housing also includes a heat insulation component, which is disposed at the interval (13).

3. The battery housing according to claim 2, characterized in that, The heat insulation component includes heat insulation adhesive, and the reinforcing beam (30) is connected to the first cold plate (20) through the heat insulation adhesive.

4. The battery housing according to claim 2, characterized in that, The heat insulation component is made of an elastic material.

5. The battery housing according to claim 1, characterized in that, The height of the interval (13) is D, 20mm≤D≤35mm.

6. The battery housing according to any one of claims 1 to 5, characterized in that, The battery box also includes a second cold plate (40) arranged in a transverse direction. The second cold plate (40) is arranged parallel to the first cold plate (20), and the reinforcing beam (30) is provided on the second cold plate (40).

7. The battery housing according to claim 6, characterized in that, The battery housing also includes a vertically arranged frame (50), the edges of the first cold plate (20) and the second cold plate (40) are respectively connected to the frame, and the frame (50), the second cold plate (40) and the first cold plate (20) together form the lower battery cavity (12).

8. The battery housing according to any one of claims 1 to 5, characterized in that, The lower battery cavity (12) is provided with a plurality of reinforcing beams (30), which divide the lower battery cavity (12) into a plurality of sub-battery cavities.

9. The battery housing according to any one of claims 1 to 5, characterized in that, The reinforcing beam (30) is a reinforcing plate arranged vertically. The reinforcing plate has a reinforcing plate cavity (31) inside. The reinforcing plate extends in a first transverse direction to separate the lower battery cavity (12) in a second transverse direction, and the first transverse direction and the second transverse direction are arranged at an angle.

10. The battery housing according to any one of claims 1 to 5, characterized in that, The battery housing also includes an upper cover (60), which covers the top of the first cold plate (20), and the upper cover (60) and the first cold plate (20) together form the upper battery cavity (11).

11. A battery pack, characterized in that, The battery pack includes a battery housing and a battery pack, wherein the battery pack is disposed in the battery pack placement position of the battery housing, and the battery housing is the battery housing according to any one of claims 1 to 10.

12. An electrical appliance, characterized in that, The electrical device includes a battery pack, which is the battery pack according to claim 11.

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