Floor panel assembly, battery box and battery device
By using a reinforced structure with lateral and longitudinal stiffeners in the battery assembly, the problems of heavy cold plate support plate weight and material waste are solved, achieving a lightweight and high-strength cold plate design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CALB GROUP CO LTD
- Filing Date
- 2025-09-17
- Publication Date
- 2026-08-04
AI Technical Summary
In the prior art, the cold plate support plate of the battery device is relatively heavy, which increases the overall weight and wastes materials.
The structure employs a reinforced design, including transverse reinforcements and a first longitudinal reinforcement, connected by strip holes to enhance the structural strength of the cold plate and reduce weight and material consumption through an adjustable connection method.
This improved the structural strength of the cold-rolled steel plate, reduced the risk of bending deformation, reduced material usage, and achieved a lighter weight and a more flexible assembly process.
Smart Images
Figure CN224595592U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a base plate assembly, a battery box, and a battery device. Background Technology
[0002] A battery device typically includes a battery pack and a battery case. The battery pack is housed inside the battery case, and the bottom plate assembly of the battery case has a cold plate that contacts the battery pack to cool it.
[0003] In related technologies, to ensure the strength of the cold plate, a support plate connected to the frame is usually installed to abut against the bottom of the cold plate. However, the support plate is relatively heavy, which increases the weight of the entire battery device, and also results in material waste. Utility Model Content
[0004] The first objective of this application is to provide a base plate assembly to solve the technical problems of heavy weight and material waste in the related art.
[0005] The second objective of this application is to provide a battery box that is lightweight.
[0006] A third objective of this application is to provide a battery device that can have a lighter weight.
[0007] Battery box and battery device.
[0008] Based on the above concept, the technical solution adopted in this application is:
[0009] Base plate assembly, including:
[0010] frame;
[0011] Cold plate, the cold plate being connected to the frame;
[0012] A limiting component is disposed on one side of the cold plate and configured to limit the battery pack or battery cell.
[0013] A reinforcing structure is provided on the other side of the cold plate. The reinforcing structure includes a transverse reinforcing member and a first longitudinal reinforcing member. The transverse reinforcing member is connected to the cold plate. The first longitudinal reinforcing member is connected to the frame and abuts against the cold plate. The first longitudinal reinforcing member has a strip hole. A first connecting member passes through the strip hole and connects the first longitudinal reinforcing member, the cold plate, and the limiting member.
[0014] The beneficial effects of this application are:
[0015] A reinforcing structure is provided on the side of the cold plate away from the limiting member. The reinforcing structure includes a transverse reinforcing member and a first longitudinal reinforcing member. The transverse reinforcing member increases the structural strength of the cold plate in the transverse direction, and the first longitudinal reinforcing member increases the structural strength of the cold plate in the longitudinal direction. This ensures that the cold plate has high structural strength and reduces the risk of bending deformation. Compared with a single plate structure, the transverse and first longitudinal reinforcing members have smaller areas, resulting in less material consumption and weight. Furthermore, by providing a strip hole on the first longitudinal reinforcing member, the first connecting member can move relative to the first longitudinal reinforcing member along the length of the strip hole, making the position of the first longitudinal reinforcing member relative to the cold plate adjustable. The assembly of the first longitudinal reinforcing member is more flexible, and the dimensional tolerance requirements for the first longitudinal reinforcing member are lower, thus reducing the processing difficulty of the first longitudinal reinforcing member and reducing the risk of failure to connect with the cold plate due to dimensional deviations. In addition, by providing strip holes, multiple first connecting members can pass through each strip hole. Increasing the number of first connecting members further improves the connection strength of the first longitudinal reinforcing member, the cold plate, and the limiting member. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this application and these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the battery device provided in the embodiments of this application;
[0018] Figure 2 This is an exploded view of the battery device provided in the embodiments of this application;
[0019] Figure 3 This is a first structural schematic diagram of the base plate assembly provided in an embodiment of this application;
[0020] Figure 4 This is a schematic diagram of the second structure of the base plate assembly provided in the embodiments of this application;
[0021] Figure 5 This is a top view of the base plate assembly provided in the embodiments of this application;
[0022] Figure 6 This is an embodiment of the present application. Figure 5 The AA section view shown;
[0023] Figure 7 This is an embodiment of the present application. Figure 6 The enlarged view at point B is shown below;
[0024] Figure 8 This is an embodiment of the present application. Figure 6 The enlarged view at point C is shown below;
[0025] Figure 9 This is a schematic diagram of the structure of the sealing gasket provided in the embodiments of this application;
[0026] Figure 10 This is an exploded view of the base plate assembly provided in the embodiments of this application;
[0027] Figure 11 This is a schematic diagram of the structure of the transverse reinforcement provided in the embodiments of this application;
[0028] Figure 12 This is a schematic diagram of the structure of the first longitudinal reinforcement provided in the embodiment of this application;
[0029] Figure 13 This is a schematic diagram of the structure of the second longitudinal reinforcement provided in the embodiments of this application.
[0030] In the picture:
[0031] 1. Frame; 2. Cold plate; 21. Cooling channel; 22. First plate; 23. Second plate; 3. Limiting component; 31. Inner cavity; 4. Reinforcing structure; 41. Lateral reinforcement; 411. First reinforcing protrusion; 412. Third fixing hole; 42. First longitudinal reinforcement; 421. Second reinforcing protrusion; 422. Strip hole; 423. First fixing hole; 43. Second longitudinal reinforcement; 431. Third reinforcing protrusion; 432. Third fixing hole; 5. First connector; 51. Screw; 52. Sealing structure; 521. Column; 5211. Internal thread; 522. Sealing gasket; 10. Housing; 20. Base plate assembly; 100. Battery pack. Detailed Implementation
[0032] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not all of them.
[0033] It should be understood that the phrase "an embodiment" or "one embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in one embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.
[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0035] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.
[0037] In the description of this embodiment, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation. They 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 a limitation of this application. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0038] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.
[0039] The technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments.
[0040] In related technologies, the bottom of the battery box typically features a cold plate for cooling the battery pack. This cold plate allows the battery box to be used in vehicles or other products. Because the battery box needs to be mounted on other components, and the cold plate will contact these components, a base plate is usually required to support the cold plate. This base plate is typically a metal plate of a certain thickness to provide high structural strength. However, the addition of a base plate increases the overall weight of the battery box. This means that, for the same weight requirement for the battery box, the weight of the base plate will contribute to the weight of the battery pack, thus affecting the energy density of the battery device.
[0041] To address the aforementioned issues, this embodiment provides a battery device that, while improving the structural strength of the cold plate, has a lighter weight and requires fewer consumable materials.
[0042] For example, such as Figure 1 and Figure 2 As shown, the battery device includes a battery box and a battery pack 100 or individual battery cells disposed within the battery box. The battery box is used to house the individual battery cells or the battery pack 100. Multiple individual battery cells with similar capacity and internal resistance are connected in series, parallel, or a combination thereof to form a battery pack.
[0043] Please refer to Figure 2 , Figure 2 Exploded views of battery devices provided in some embodiments of this application. Figure 3This is a schematic diagram of the structure of a battery pack 100 according to some embodiments of this application. The battery device includes a battery box and a battery pack 100, with the battery pack 100 housed within the battery box. The battery box provides a accommodating space for the battery pack 100, and can employ various structures. In some embodiments, the battery box may include a base plate assembly 20 and a housing 10, with the base plate assembly 20 and housing 10 overlapping each other, jointly defining a accommodating space for accommodating the battery pack 100. Optionally, to ensure a sealing effect, both the base plate assembly 20 and the housing 10 may have mating flanges at their edges. The housing 10 may be a hollow structure open at one end, and the base plate assembly 20 may be a plate-like structure, covering the open side of the housing 10 so that the base plate assembly 20 and the housing 10 jointly define the accommodating space; alternatively, both the base plate assembly 20 and the housing 10 may be hollow structures open on one side, with the open side of the base plate assembly 20 covering the open side of the housing 10. Of course, the battery box formed by the base plate assembly 20 and the housing 10 can be of various shapes, such as cylinder, cuboid, etc.
[0044] Optionally, in the battery device, there can be one or more battery packs 100, and each battery pack 100 can include multiple battery cells. These multiple battery cells can be connected in series, parallel, or in a mixed configuration, where a mixed configuration means that multiple battery cells are connected in both series and parallel connections. Multiple battery cells can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of these battery cells is housed within a battery case. Alternatively, the battery device can also consist of multiple battery cells first connected in series, parallel, or in a mixed configuration to form battery packs 100, and then these battery packs 100 are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within a battery case. The battery device may also include other structures; for example, it may include a busbar (not shown in the figure) for electrical connection between the multiple battery packs 100.
[0045] The individual battery cells can be secondary or primary batteries; they can also be lithium-sulfur, sodium-ion, or magnesium-ion batteries, but are not limited to these. The battery pack 100 can be cylindrical, flat, cuboid, or other shapes.
[0046] For example, such as Figure 2 As shown, the battery pack 100 may include multiple battery cells. These battery cells can be connected in series, parallel, or a combination thereof to form the battery pack 100. The multiple battery packs 100 can then be connected in series, parallel, or a combination thereof to form a single unit. Battery packs 100 are generally classified into three types according to their packaging method: cylindrical battery packs, cuboid battery packs, and pouch battery packs. This application embodiment is not limited to any of these types. However, for the sake of brevity, the following embodiments will use cuboid battery packs as an example for illustration.
[0047] It should be noted that a battery cell refers to the smallest unit that makes up a battery device. A battery cell includes an end cap, a housing, and an electrode assembly. The end cap is a component that closes onto the opening of the housing to isolate the internal environment of the battery cell from the external environment. Functional components such as electrode terminals may be provided on the end cap. The electrode terminals can be used to electrically connect with the electrode assembly for outputting or inputting electrical energy into the battery pack 100. In some embodiments, the end cap may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery pack 100 reaches a threshold. In some embodiments, an insulating member may also be provided on the inside of the end cap, which can be used to isolate the electrical connection components within the housing from the end cap to reduce the risk of short circuits. Exemplarily, the insulating member may be plastic, rubber, etc. The housing is an assembly used to cooperate with the end cap to form the internal environment of the battery cell, wherein the formed internal environment can be used to accommodate the electrode assembly, electrolyte, and other components. The housing and the end cap may be independent components, and an opening may be provided on the housing, with the end cap closing the opening to form the internal environment of the battery cell. The housing can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing can be determined according to the specific shape and size of the electrode assembly. The housing can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this.
[0048] Electrode assemblies are the components within a single battery cell where electrochemical reactions occur. A casing may contain one or more electrode assemblies. Electrode assemblies are primarily formed by winding or stacking positive and negative electrode plates, typically with a separator between them. The portions of the positive and negative electrode plates containing active material constitute the main body of the electrode assembly, while the portions without active material each form a tab. The positive and negative tabs can be located together at one end of the main body or separately at both ends. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop.
[0049] For example, Figures 3 to 13 This is a structural schematic diagram of a base plate assembly 20 provided in this embodiment. The base plate assembly 20 provided in this embodiment can be relatively lightweight and can also protect the cold plate 2, requiring less material.
[0050] In some embodiments, such as Figure 3 As shown, the base plate assembly 20 includes a frame 1, a cold plate 2, a limiting member 3, and a reinforcing structure 4. The frame 1 is used for end connection of the housing 10. The frame 1 can be composed of at least two strip sheet metal pieces, used to connect the cold plate 2 to the housing 10, thereby allowing the cold plate 2 and the housing 10 to cooperate to form a space for accommodating the battery pack 100 or individual battery cells.
[0051] In this embodiment, the cold plate 2 is connected to the inner side of the frame 1. The cold plate 2 can be a liquid-cooled plate, an air-cooled plate, or other types of cold plates 2. Lithium batteries and other chemical batteries have the characteristics of high energy density, long service life, and high operating voltage. However, when chemical batteries are working, high and low temperatures have a great impact on the cells. In order to make the operating temperature of the cells in the chemical battery uniform, the internal temperature of the battery box is adjusted by the cold plate 2, so that the cells work in a relatively stable temperature environment.
[0052] In one implementation, such as Figure 4 As shown, the limiting member 3 is disposed on one side of the cold plate 2. The limiting member 3 is located in the receiving space for accommodating the battery pack 100 or battery cell, and the limiting member 3 is configured to limit the battery pack 100 or battery cell. The length direction of the limiting member 3 can be set according to requirements. For example, multiple limiting members 3 can be provided, and multiple limiting members 3 cooperate with each other to form multiple independent installation spaces, each of which is equipped with a battery pack 100 or battery cell. In some optional embodiments, the limiting member 3 can also be called a crossbeam or a longitudinal beam, which is not limited in this embodiment.
[0053] For example, such as Figure 3 As shown, the reinforcing structure 4 is located on the other side of the cold plate 2. That is, the reinforcing structure 4 and the limiting member 3 are located on both sides in the thickness direction of the cold plate 2. The reinforcing structure 4 is used to increase the structural strength of the cold plate 2 and reduce the risk of bending deformation of the cold plate 2.
[0054] In at least one possible implementation, such as Figure 3 As shown, the reinforcing structure 4 includes a transverse reinforcing member 41 and a first longitudinal reinforcing member 42. The transverse reinforcing member 41 is connected to the cold plate 2 and is used to increase the structural strength of the cold plate 2 in the transverse direction. It should be noted that the transverse reinforcing member 41 can be understood as a reinforcing member extending in the transverse direction, and the longitudinal reinforcing member can be understood as a reinforcing member extending in the longitudinal direction. Exemplarily, the transverse direction can be the transverse direction of the cold plate 2, and the longitudinal direction can be the longitudinal direction of the cold plate 2. The transverse and longitudinal directions are perpendicular to each other. In some embodiments, the transverse direction of the cold plate 2 can be the length direction of the cold plate 2, and the longitudinal direction of the cold plate 2 can be the width direction of the cold plate 2. In some optional embodiments, the length direction of the transverse reinforcing member 41 is the transverse direction of the cold plate 2. The connection method between the transverse reinforcing member 41 and the cold plate 2 can be various, for example, they can be welded, riveted, etc., which is not limited in this embodiment.
[0055] In this embodiment, the first longitudinal stiffener 42 is connected to the frame 1 and abuts against the cold plate 2 to enhance the structural strength of the cold plate 2 in the longitudinal direction. In some optional embodiments, the length direction of the first longitudinal stiffener 42 is the longitudinal direction of the cold plate 2. It should be noted that the first longitudinal stiffener 42 abutting against the cold plate 2 can be understood as the first longitudinal stiffener 42 being tightly abutting against the cold plate 2, so that the first longitudinal stiffener 42 and the cold plate 2 form an integral whole, thereby increasing the structural strength of the cold plate 2.
[0056] For example, such as Figure 5 As shown, the first longitudinal reinforcement 42 is provided with a strip hole 422. The first connector 5 passes through the strip hole 422 and connects the first longitudinal reinforcement 42, the cold plate 2 and the limiting member 3, so that the first longitudinal reinforcement 42, the cold plate 2 and the limiting member 3 can be connected into a whole. On the one hand, it can further increase the structural strength of the cold plate 2 and reduce the risk of deformation of the cold plate 2. On the other hand, it also improves the connection strength between the limiting member 3 and the cold plate 2, ensuring the relative position of the limiting member 3 and the cold plate 2, thereby ensuring the effect of the limiting member 3 in limiting the battery pack 100 or the battery cell.
[0057] It should be noted that the first connector 5 can pass through the cold plate 2 and at least part of the limiting member 3, thereby achieving connection with the cold plate 2 and the limiting member 3.
[0058] The base plate assembly 20 provided in this embodiment has a reinforcing structure 4 on the side of the cold plate 2 away from the limiting member 3. The reinforcing structure 4 includes a transverse reinforcing member 41 and a first longitudinal reinforcing member 42. The transverse reinforcing member 41 is used to increase the structural strength of the cold plate 2 in the transverse direction, and the first longitudinal reinforcing member 42 is used to increase the structural strength of the cold plate 2 in the longitudinal direction. This ensures that the cold plate 2 has high structural strength and reduces the risk of bending deformation. Compared with a whole plate structure, the area of the transverse reinforcing member 41 and the first longitudinal reinforcing member 42 can be smaller, thus requiring less material and reducing weight. Furthermore, by providing a strip hole 422 on the first longitudinal reinforcing member 42, the first connecting member 5 can... The first longitudinal stiffener 42 can be moved along the length of the slot 422 relative to the first longitudinal stiffener 42, thereby making the position of the first longitudinal stiffener 42 relative to the cold plate 2 adjustable. The assembly of the first longitudinal stiffener 42 can be more flexible, and the dimensional tolerance requirements of the first longitudinal stiffener 42 are lower, thereby making the processing difficulty of the first longitudinal stiffener 42 lower and reducing the risk that the first longitudinal stiffener 42 cannot be connected to the cold plate 2 due to dimensional deviations. In addition, by setting the slot 422, each slot 422 can pass through multiple first connectors 5. Increasing the number of first connectors 5 can further improve the connection strength of the first longitudinal stiffener 42, the cold plate 2, and the limiting member 3.
[0059] It should be noted that the limiting component 3 also has the function of reinforcing the structural strength of the cold plate 2 to improve the overall structural strength of the battery box. The number of limiting components 3, the installation direction and position of the limiting components 3 on the cold plate 2, and the connection method between the limiting components 3 and the cold plate 2 are all unlimited.
[0060] Optionally, the material of the limiting member 3 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating member can also be provided on the inner side of the limiting member 3. The insulating member can be used to isolate the electrical connection components inside the battery box from the limiting member 3 to reduce the risk of short circuit. For example, the insulating member can be plastic, rubber, etc.
[0061] In at least one possible implementation, such as Figure 6 or Figure 8 As shown, the limiting member 3 has an inner cavity 31, and the end of the first connecting member 5 can be located in the inner cavity 31 to be accommodated in the inner cavity 31 without penetrating the limiting member 3, thus preventing the first connecting member 5 from interfering with other components inside the battery box.
[0062] In some embodiments, one or more transverse stiffeners 41 may be provided. When multiple transverse stiffeners 41 are provided, they are spaced apart along the longitudinal direction of the cold plate 2 to uniformly increase the structural strength of the cold plate 2. This embodiment Figure 3 The diagram shows a transverse reinforcing member 41. Optionally, one end of the transverse reinforcing member 41 may extend to one end of the cold plate 2, and the other end of the transverse reinforcing member 41 may extend to the other end of the cold plate 2. This embodiment does not limit this.
[0063] In at least one possible implementation, one or more first longitudinal stiffeners 42 may be provided. When multiple first longitudinal stiffeners 42 are provided, they are spaced apart laterally along the cold plate 2 to uniformly increase the structural strength of the cold plate 2. This embodiment Figure 3 This is a schematic diagram showing that there are three longitudinal reinforcement members.
[0064] The structure of the first connector 5 can be varied. For example, this embodiment provides a first connector 5.
[0065] In some embodiments, such as Figure 7 and Figure 9 As shown, the first connecting member 5 includes a screw 51 and a sealing structure 52. The sealing structure 52 is used to seal the gap between the cold plate 2 and the screw 51, and to seal the gap between the limiting member 3 and the screw 51.
[0066] In at least one possible implementation, please continue to see Figure 7 and Figure 9The sealing structure 52 includes a column 521 and a sealing gasket 522 connected to one end of the column 521. The sealing gasket 522 is fixedly connected to the cold plate 2 and located between the cold plate 2 and the first longitudinal reinforcement 42 to seal the gap between the cold plate 2 and the first longitudinal reinforcement 42. The column 521 passes through the cold plate 2 and is placed within the limiting member 3. The cold plate 2 has a through hole (not shown in the figure), and the column 521 tightly abuts against the wall of the through hole on the cold plate 2 to form a seal, preventing external water and other impurities from entering the inner side of the cold plate 2 (i.e., the side of the cold plate 2 that supports the battery pack 100 or individual battery cells) through the through hole. The column 521 is provided with an internal thread 5211. The screw 51 passes through the strip hole 422 and is screwed to the column 521 through the internal thread 5211 to realize the connection between the screw 51 and the sealing structure 52. This enables the sealing connection of the first longitudinal reinforcement 42, the cold plate 2 and the limiting member 3, preventing water and other impurities from entering the battery box and improving reliability.
[0067] It should be noted that the head of the screw 51 is located on the side of the first longitudinal reinforcement 42 away from the cold plate 2. When the screw 51 is screwed to the column 521, it can squeeze the first longitudinal reinforcement 42 to move towards the cold plate 2, thereby indirectly squeezing the sealing gasket 522 to ensure the sealing function of the sealing gasket 522.
[0068] Optionally, such as Figure 9 As shown, a groove is provided on the end face of one end of the column 521, and the internal thread 5211 is provided in the groove. The groove does not extend to the other end of the column 521. With this arrangement, water or other impurities between the screw 51 and the column 521 can be collected in the groove and will not enter the inner cavity 31 of the limiting member 3 and the inside of the battery box through the column 521, thus further ensuring the sealing effect.
[0069] In some optional embodiments, the first longitudinal stiffener 42 is connected to the cold plate 2 not only via the first connector 5, but also via a second connector (not shown in the figure). For example, Figure 12 As shown, the edge of the first longitudinal reinforcing member 42 may be provided with a first fixing hole 423. The cold plate 2 includes a first plate 22 and a second plate 23 connected to each other. The first plate 22 and the second plate 23 cooperate to form a cooling channel 21. The cooling channel 21 is used for the flow of medium so that the medium carries away the heat on the first plate 22 and the second plate 23. In this embodiment, the second plate 23 is closer to the battery pack 100 or the battery cell than the first plate 22. The cooling channel 21 is connected to an external thermal management system so that the thermal management system provides a medium to the cooling channel 21. For the specific working principle, please refer to the prior art. Multiple cooling channels 21 may be provided, and the multiple cooling channels 21 are arranged at intervals.
[0070] In this embodiment, the second connector (e.g., screw 51) passes through the first fixing hole 423 and is fixed to the first plate 22 without penetrating the second plate 23 (allowing for a gap between the first plate 22 and the second plate 23). This allows the second connector to connect the first longitudinal reinforcement 42 and the cold plate 2 without penetrating the cold plate 2, thus preventing sealing failure and ensuring the sealing performance inside the battery box. It should be noted that the second connector can connect to the portion of the first plate 22 that does not enclose the cooling channel 21, preventing the medium from contacting the second connector.
[0071] In at least one possible implementation, such as Figure 11 As shown, the edge of the transverse reinforcement 41 is also provided with a second fixing hole. A third connector (not shown in the figure) passes through the second fixing hole and connects the first longitudinal reinforcement 42 and the transverse reinforcement 41. That is, in this embodiment, the transverse reinforcement 41 intersects and connects with the first longitudinal reinforcement 42. In this way, the transverse reinforcement 41, the longitudinal reinforcement, and the cold plate 2 can be a whole structure, which improves the overall integrity and thus has higher structural strength. It should be noted that when there are multiple first longitudinal reinforcements 42, each second longitudinal reinforcement 43 is adjacent to the transverse reinforcement 41.
[0072] In at least one embodiment, such as Figure 3 As shown, the reinforcing structure 4 also includes a second longitudinal reinforcing member 43. The length direction of the second longitudinal reinforcing member 43 is the same as that of the first longitudinal reinforcing member 42; that is, the second longitudinal reinforcing member 43 also extends longitudinally along the cold plate 2 to increase the structural strength of the cold plate 2 in the longitudinal direction. The second longitudinal reinforcing member 43 is spaced apart from the first longitudinal reinforcing member 42. Both ends of the second longitudinal reinforcing member 43 are connected to the frame 1 and abut against the cold plate 2, so that it can form an integral structure with the cold plate 2, thereby improving the structural strength of the cold plate 2 and reducing the risk of bending deformation of the cold plate 2.
[0073] In some optional embodiments, one or more second longitudinal stiffeners 43 may be provided. When multiple second longitudinal stiffeners 43 are provided, they are spaced apart in the transverse direction of the cold plate 2 and spaced apart from the first longitudinal stiffeners 42. This ensures the structural strength of the cold plate 2 while minimizing the material consumption of the reinforcing structure 4, thereby reducing the weight of the base plate assembly 20. In this embodiment... Figure 3 This is a schematic diagram showing that there are four second longitudinal reinforcement members 43, which are symmetrically arranged with one of the first longitudinal reinforcement members 42 as the center of symmetry.
[0074] In at least one possible implementation, such as Figure 13As shown, the edge of the second longitudinal reinforcement 43 may be provided with a third fixing hole 432. The fourth connector (not shown in the figure) passes through the third fixing hole 432 and connects the second longitudinal reinforcement 43 and the cold plate 2. The connection method can refer to the connection method of the first longitudinal reinforcement 42 and the cold plate 2. This embodiment will not be described in detail.
[0075] It should be noted that the transverse stiffener 41 and the cold plate 2 can be welded together to improve the reliability of the connection. The first longitudinal stiffener 42 and the cold plate 2 can also be welded together, the second longitudinal stiffener 43 and the cold plate 2 can also be welded together, the first longitudinal stiffener 42 and the transverse stiffener 41 can also be welded together, and the second longitudinal stiffener 43 and the transverse stiffener 41 can also be welded together. This embodiment does not limit this.
[0076] Optionally, to improve the overall integrity of the second longitudinal stiffener 43 and the transverse stiffener 41, such as Figure 3 As shown, the second longitudinal reinforcement 43 intersects and connects with the transverse reinforcement 41. This arrangement, with the second longitudinal reinforcement 43 and the transverse reinforcement 41 intersecting to form a mesh structure, combined with the first longitudinal reinforcement 42, further enhances the structural reinforcement of the cold plate 2 and reduces the risk of deformation of the cold plate 2.
[0077] In at least one possible implementation, the cold plate 2 is provided with a cooling channel 21, which typically extends in the same direction as the transverse direction of the cold plate 2. Figure 11 As shown, the transverse stiffener 41 is provided with a first reinforcing protrusion 411, wherein the length direction of the first reinforcing protrusion 411 is the same as the extension direction of the cooling channel 21. The provision of the first reinforcing protrusion 411 can improve the structural strength of the transverse stiffener 41 and reduce the risk of deformation of the transverse stiffener 41.
[0078] Optionally, the first reinforcing protrusion 411 may protrude towards the cold plate 2. In this way, the provision of the first reinforcing protrusion 411 will not increase the thickness of the base plate assembly 20, thereby ensuring the energy density of the battery device. In some optional embodiments, the cold plate 2 may be provided with a groove corresponding to the first reinforcing protrusion 411. The first reinforcing protrusion 411 is placed in the corresponding groove and abuts against the groove wall to achieve the stop between the lateral reinforcing member 41 and the cold plate 2.
[0079] In some embodiments, multiple first reinforcing protrusions 411 may be provided, and the multiple first reinforcing protrusions 411 are spaced apart to improve the structural strength of each position of the transverse reinforcing member 41.
[0080] In at least one implementation, such as Figure 12As shown, the first longitudinal stiffener 42 is provided with a second reinforcing protrusion 421, the length direction of which is perpendicular to the extension direction of the cooling channel 21. The provision of the second reinforcing protrusion 421 can improve the structural strength of the first longitudinal stiffener 42 and reduce the risk of deformation of the first longitudinal stiffener 42.
[0081] Optionally, the second reinforcing protrusion 421 may protrude toward the cold plate 2, so that the setting of the second reinforcing protrusion 421 will not increase the thickness of the base plate assembly 20, thereby ensuring the energy density of the battery device.
[0082] In some embodiments, multiple second reinforcing protrusions 421 may be provided, and the multiple second reinforcing protrusions 421 are spaced apart to improve the structural strength of each position of the first longitudinal reinforcement 42.
[0083] When the reinforcing structure 4 includes the second longitudinal reinforcing member 43, such as Figure 13 As shown, the second longitudinal stiffener 43 is provided with a third reinforcing protrusion 431, the length direction of which is perpendicular to the extension direction of the cooling channel 21. The provision of the third reinforcing protrusion 431 can improve the structural strength of the second longitudinal stiffener 43 and reduce the risk of deformation of the second longitudinal stiffener 43.
[0084] Optionally, the third reinforcing protrusion 431 may protrude toward the cold plate 2, so that the setting of the third reinforcing protrusion 431 will not increase the thickness of the base plate assembly 20, thereby ensuring the energy density of the battery device.
[0085] In some embodiments, multiple third reinforcing protrusions 431 may be provided, and the multiple third reinforcing protrusions 431 are spaced apart to improve the structural strength of each position of the second longitudinal reinforcement 43.
[0086] In at least one optional embodiment, the material of the transverse stiffener 41 is the same as that of the cold plate 2. This arrangement facilitates welding of the transverse stiffener 41 to the cold plate 2. Furthermore, since the cold plate 2 has good heat transfer properties, and the transverse stiffener 41 is made of the same material as the cold plate 2, it also has good heat transfer properties, which is beneficial to the heat dissipation of the base plate assembly 20.
[0087] Optionally, the material of the first longitudinal reinforcement 42 can be the same as that of the cold plate 2, and the material of the second longitudinal reinforcement 43 can be the same as that of the cold plate 2.
[0088] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of this application, the scope of which is determined by the scope of the appended claims.
Claims
1. A base plate assembly, characterized in that, include: Framework (1); Cold plate (2), the cold plate (2) is connected to the frame (1); A limiting member (3) is disposed on one side of the cold plate (2) and is configured to limit the battery pack (100) or a battery cell; A reinforcing structure (4) is provided on the other side of the cold plate (2). The reinforcing structure (4) includes a transverse reinforcing member (41) and a first longitudinal reinforcing member (42). The transverse reinforcing member (41) is connected to the cold plate (2). The first longitudinal reinforcing member (42) is connected to the frame (1) and abuts against the cold plate (2). The first longitudinal reinforcing member (42) is provided with a strip hole (422). A first connecting member (5) passes through the strip hole (422) and connects the first longitudinal reinforcing member (42), the cold plate (2), and the limiting member (3).
2. The base plate assembly according to claim 1, characterized in that, The reinforcing structure (4) further includes a second longitudinal reinforcing member (43), the length direction of which is the same as that of the first longitudinal reinforcing member (42), and is spaced apart from the first longitudinal reinforcing member (42); the second longitudinal reinforcing member (43) is connected to the frame (1) and abuts against the cold plate (2).
3. The base plate assembly according to claim 2, characterized in that, The second longitudinal reinforcement (43) intersects with and is connected to the transverse reinforcement (41).
4. The base plate assembly according to claim 1, characterized in that, The cold plate (2) is provided with a cooling channel (21), and the transverse reinforcing member (41) is provided with a first reinforcing protrusion (411), the length direction of the first reinforcing protrusion (411) is the same as the extension direction of the cooling channel (21).
5. The base plate assembly according to claim 1, characterized in that, The cold plate (2) is provided with a cooling channel (21), and the first longitudinal reinforcement (42) is provided with a second reinforcing protrusion (421), the length direction of the second reinforcing protrusion (421) being perpendicular to the extension direction of the cooling channel (21).
6. The base plate assembly according to claim 1, characterized in that, The first connector (5) includes a screw (51) and a sealing structure (52); The sealing structure (52) includes a column (521) and a sealing gasket (522) connected to one end of the column (521). The sealing gasket (522) is connected to the cold plate (2) and located between the cold plate (2) and the first longitudinal reinforcement (42). The column (521) passes through the cold plate (2) and is placed inside the limiting member (3). The column (521) is provided with an internal thread (5211). The screw (51) passes through the strip hole (422) and is screwed to the column (521) through the internal thread (5211).
7. The base plate assembly according to any one of claims 1-6, characterized in that, The first longitudinal reinforcement (42) is provided and is connected to the transverse reinforcement (41); Alternatively, multiple first longitudinal reinforcement members (42) may be provided, with multiple first longitudinal reinforcement members (42) spaced apart, and each first longitudinal reinforcement member (42) may be connected to the transverse reinforcement member (41).
8. The base plate assembly according to any one of claims 1-6, characterized in that, The material of the transverse reinforcing member (41) is the same as that of the cold plate (2); And / or, the material of the first longitudinal reinforcement (42) is the same as that of the cold plate (2).
9. A battery box, characterized in that, Includes a housing (10) and a base plate assembly as described in any one of claims 1-8, wherein the housing (10) is connected to the frame (1).
10. A battery device, characterized in that, Includes the base plate assembly as described in any one of claims 1-8; or, the battery device includes the battery case as described in claim 9; The battery device further includes a battery pack (100) or a battery cell, which is supported on the cold plate (2) and limited by the limiting member (3).