Battery box, battery and electric device

Abstract

The invention provides a battery box, a battery and a power utilization device, and belongs to the technical field of batteries. The battery box comprises a box body and a mounting beam. The box body is provided with a containing cavity, the installation beams extend in the first direction and are located on at least one side, in the second direction, of the box body, and the first direction intersects with the second direction. The mounting beam is connected with the box side wall of the box body and the side, away from the containing cavity, of the box bottom wall. The installation beams are connected with the box side walls of the box body, the installation beams are connected with the first layer of the box body, the installation beams are connected with the box bottom wall of the box body, the installation beams are connected with the second layer of the box body, and the firmness of connection between the box body and the installation beams can be improved. When the battery box provided by the embodiment of the invention is mounted on the power utilization device, the possibility that the battery box falls off from the power utilization device can be reduced, and the stability of the power utilization device is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery box, a battery, and an electrical device. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0003] When batteries are installed in electrical devices such as automobiles, mounting beams are typically provided on the battery box to secure the battery to the device. However, in related art, the connection between the mounting beams and the battery box is not secure enough, potentially causing the battery to fall off the device, affecting its stability. Summary of the Invention

[0004] The present application aims to solve at least one of the technical problems in the background art. To this end, one purpose of the present application is to provide a battery box, a battery, and an electrical device that can improve the firmness of the connection between the mounting beam and the box body and improve the stability of the electrical device.

[0005] An embodiment of the first aspect of the present application provides a battery box, comprising: a box body having a accommodating cavity; a mounting beam extending along a first direction X, the mounting beam being located on at least one side of the box body along a second direction Y, the mounting beam being connected to a side wall and a bottom wall of the box body away from the accommodating cavity, and the first direction X intersects with the second direction Y.

[0006] In the technical solution of the embodiment of the present application, the mounting beam is connected to the side wall of the box body, achieving a first-level connection between the mounting beam and the box body, and the mounting beam is connected to the bottom wall of the box body, achieving a second-level connection between the mounting beam and the box body, which can improve the firmness of the connection between the box body and the mounting beam. When the battery box provided by the embodiment of the present application is installed in an electrical device, the possibility of the battery box falling off the electrical device can be reduced, thereby improving the stability of the electrical device.

[0007] In some embodiments, the mounting beam has a first flange extending along a first direction X. The first flange is located on a side of the bottom wall of the box away from the accommodating cavity and is connected to the bottom wall of the box. Providing the first flange on the mounting beam provides a mounting portion for the mounting beam and the bottom wall of the box. Simultaneously, the two first flanges can support the box, thereby reducing the possibility of separation between the mounting beam and the box and improving the secure connection between the mounting beam and the box.

[0008] In some embodiments, the box body has a second flange extending toward the outside of the accommodating cavity, the second flange being connected to the box sidewall, and the mounting beam having a beam sidewall extending along the first direction X, the beam sidewall being aligned and connected to the box sidewall and the second flange. By providing the second flange on the box body and by having the beam sidewall of the mounting beam aligned and connected to the second flange of the box body, a third layer of connection is achieved between the mounting beam and the box body, thereby improving the securement of the connection between the box body and the mounting beam.

[0009] In some embodiments, the battery case further includes: an end cap that covers the opening of the accommodating cavity; and a connector, one end of which passes through the end cap and the second flange in sequence and connects to the side wall of the beam. The end cap covers the opening of the accommodating cavity to protect the battery cells within the accommodating cavity and improve the stability of the battery. The connector is provided to connect the case body and the end cap to improve the secure connection between the end cap and the case body. The connector also connects the case body and the mounting beam, thereby improving the secure connection between the case body and the mounting beam.

[0010] In some embodiments, the bottom wall of the battery case has a first mounting groove, the opening of the first mounting groove facing the side of the bottom wall away from the accommodating cavity. The battery case further includes: a bottom guard plate located on the side of the bottom wall away from the accommodating cavity and connected to the battery case; and a thermal management component located between the bottom guard plate and the bottom wall, with at least a portion of the thermal management component located in the first mounting groove. The bottom guard plate protects the bottom wall and provides cushioning protection against impacts or knocks to the bottom of the battery case, thereby improving the reliability of the battery case. It also protects the battery cells located in the accommodating cavity, thereby improving battery reliability. The thermal management component provides thermal management for the battery cells located in the accommodating cavity. When the battery cell temperature is too low, the thermal management component can be used to increase the temperature of the battery cell; when the battery cell temperature is too high, the thermal management component can be used to reduce the temperature of the battery cell to a suitable operating temperature, thereby improving the stability of the battery. The first mounting groove is provided on the bottom wall of the battery case to provide mounting space for the thermal management component.

[0011] In some embodiments, the battery case further comprises a buffer member positioned between the case body and the bottom guard plate. The buffer member has a second mounting groove corresponding to the first mounting groove. The second mounting groove and the first mounting groove overlap to form a mounting space, and the thermal management component is positioned in the mounting space. When the battery case is impacted, the buffer member provides a buffer, protecting the battery cells or the thermal management component, reducing the possibility of damage to the battery cells or the thermal management component, and improving battery reliability.

[0012] In some embodiments, the cushioning element is made of at least one of foam and rigid polyurethane. Foam and rigid polyurethane have good cushioning properties, resulting in the cushioning element having excellent cushioning performance. Furthermore, both foam and rigid polyurethane are readily available and inexpensive, reducing the cost of manufacturing the battery box.

[0013] In some embodiments, the battery case further comprises an expansion beam extending along a second direction Y. The expansion beam is positioned within the accommodating cavity, and opposite ends of the expansion beam along the second direction Y are connected to the case sidewalls. The expansion beam is connected to the case sidewalls at opposite ends along the second direction Y. When the case sidewalls deform, the expansion beam acts as a barrier, minimizing deformation and increasing the overall strength of the battery case. Furthermore, the expansion beam can counteract the battery cells within the accommodating cavity. When the battery cells expand, the expansion beam resists the expansion force of the battery cells, reducing their shape and improving battery stability.

[0014] In some embodiments, the mounting beam is an integrally formed beam, welded to both the side walls and the bottom wall of the box. Integrally formed beams offer increased strength, and integral molding is a relatively convenient and simplified manufacturing process for mounting beams. Welding the mounting beam to the box side walls, and the mounting beam to the box bottom wall, eliminates the need for additional connectors, minimizing the impact on battery energy density. Welding is a relatively robust connection method that is less prone to failure, making the connection between the mounting beam and the box more secure. Furthermore, the simple welding process can simplify the production process of the battery box and improve production efficiency.

[0015] In some embodiments, the first flange of the mounting beam is welded to the bottom wall of the box, making the connection between the first flange and the bottom wall of the box more secure.

[0016] In some embodiments, the first side wall of the mounting beam is welded to the side wall of the box, and the second side wall of the mounting beam has a through-hole, the through-hole being opposite to the weld between the first side wall and the side wall of the box. The through-hole in the second side wall of the mounting beam allows welding to be performed at the joint between the first side wall and the side wall of the box, thereby facilitating the connection between the first side wall and the side wall of the box.

[0017] In some embodiments, the mounting beam has multiple buffer cavities, the multiple buffer cavities include a first sub-buffer cavity, the first sub-buffer cavity is close to the opening of the accommodating cavity, and the first side wall and the second side wall are located on opposite sides of the first sub-buffer cavity along the second direction Y.

[0018] An embodiment of the second aspect of the present application provides a battery, which includes the battery box in the above embodiment.

[0019] An embodiment of the third aspect of the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy.

[0020] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0022] Figure 1 A schematic structural diagram of a vehicle according to some embodiments of the present application;

[0023] Figure 2 Schematic diagram of the exploded structure of batteries according to some embodiments of the present application;

[0024] Figure 3 This is a schematic structural diagram of a battery box in some embodiments of the present application;

[0025] Figure 4 A top view of a battery box according to some embodiments of the present application;

[0026] Figure 5 Schematic diagram of the structure of the battery box of other embodiments of the present application;

[0027] Figure 6 Exploded views of battery boxes according to other embodiments of the present application;

[0028] Figure 7 A top view of a battery box according to some other embodiments of the present application;

[0029] Figure 8 For this application Figure 7 Cross-section of the AA plane;

[0030] Figure 9 Partial cross-sectional schematic diagrams of battery boxes according to other embodiments of the present application;

[0031] Figure 10 Partial cross-sectional schematic diagrams of battery boxes according to other embodiments of the present application;

[0032] Figure 11 Partial cross-sectional schematic diagrams of battery boxes according to other embodiments of the present application;

[0033] Figure 12 Partial cross-sectional schematic diagrams of battery boxes according to other embodiments of the present application;

[0034] Figure 13 Partial cross-sectional schematic diagrams of battery boxes according to other embodiments of the present application;

[0035] Figure 14 This is a diagram of the rolling process of some embodiments of the present application.

[0036] Description of reference numerals:

[0037] 1000, vehicle; 100, battery; 200, controller; 300, motor; 101, battery box; 111, first part; 112, second part; 102, battery cell; 10, box body; 11, receiving cavity; 12, box side wall; 13, box bottom wall; 131, first mounting groove; 14, second flange; 20, mounting beam; 21, first flange; 22, beam side wall; 23, buffer cavity; 231, first Sub-buffer cavity; 24. First side wall; 25. Second side wall; 251. Welding hole; 26. Mounting portion; 30. End cover; 40. Connector; 50. Bottom guard plate; 60. Thermal management component; 70. Expansion beam; 80. Buffer member; 81. Second mounting groove; 82. Mounting space; 1. First shape; 2. Second shape; 3. First point; 4. Second point; 5. Third point; 6. Fourth point; 7. Fifth point. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0041] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application 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 embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0046] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0047] When batteries are installed in electrical devices, mounting beams are typically installed on the battery box to enhance their stability. These beams connect the batteries to the device. A weak connection between the mounting beams and the battery box can easily cause the batteries to fall off the device, impacting its reliability.

[0048] An embodiment of the present application provides a battery box, comprising a box body and a mounting beam, the mounting beam extending along a first direction, being located on at least one side of the box body along a second direction, and being connected to the box sidewalls and bottom wall of the box body on a side away from the accommodating cavity, wherein the first direction X intersects the second direction Y. Compared to related art techniques in which the mounting beam is connected solely to the box bottom wall, the mounting beam in the embodiment of the present application is connected to the box sidewalls and bottom wall of the box body, thereby improving the secure connection between the mounting beam and the box body, reducing the possibility of the battery falling off the electrical device, and improving the reliability of the electrical device.

[0049] The batteries disclosed in the embodiments of this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. A power supply system comprising the battery cells and batteries disclosed in this application can be used to improve the reliability of the electrical device and the battery.

[0050] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device according to an embodiment of the present application.

[0051] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0052] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0053] Please refer to Figure 2 , Figure 2This is a schematic diagram of the exploded structure of a battery provided in some embodiments of the present application. The battery 100 includes a battery box 101 and a battery cell 102 , wherein the battery cell 102 is accommodated in the battery box 101 .

[0054] The battery case 101 is used to provide a storage space for the battery cells 102. The battery case 101 can adopt various structures. In some embodiments, the battery case 101 can include a first portion 111 and a second portion 112. The first portion 111 and the second portion 112 cover each other, and the first portion 111 and the second portion 112 together define a storage space for accommodating the battery cells 102. The second portion 112 can be a hollow structure with one end open. The first portion 111 can be a plate-like structure. The first portion 111 covers the open side of the second portion 112, so that the first portion 111 and the second portion 112 together define a storage space. The first portion 111 and the second portion 112 can also be hollow structures with one end open, with the open side of the first portion 111 covering the open side of the second portion 112. Of course, the battery case 101 formed by the first portion 111 and the second portion 112 can have various shapes, such as a cylinder, a rectangular parallelepiped, etc.

[0055] In the battery 100, there may be multiple battery cells 102, and the multiple battery cells 102 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 102. The multiple battery cells 102 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell 102 may be housed within the battery case 101. Of course, the battery 100 may also be a battery module formed by first connecting multiple battery cells 102 in series, in parallel, or in a hybrid connection, and then the multiple battery modules may be connected in series, in parallel, or in a hybrid connection to form an entire battery cell, and then housed within the battery case 101. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for electrically connecting the multiple battery cells 102.

[0056] Each battery cell 102 may be a secondary battery or a primary battery, and may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 102 may be cylindrical, flat, rectangular, or in other shapes.

[0057] The embodiment of the present application provides a battery box, Figure 3 This is a schematic structural diagram of the battery box of some embodiments of the present application. Figure 4 This is a top view of the battery box of some embodiments of the present application. Figure 3 and Figure 4The battery box includes a box body 10 and a mounting beam 20. The box body 10 has a receiving cavity 11. The mounting beam 20 extends along a first direction X and is located on at least one side of the box body 10 along a second direction Y. The first direction X intersects the second direction Y. The mounting beam 20 is connected to the box sidewall 12 and the box bottom wall 13 of the box body 10 on a side away from the receiving cavity 11.

[0058] In the embodiments of the present application, the housing 10 can be either the first portion 111 or the second portion 112 described above. The accommodating cavity 11 in the housing 10 is used to accommodate the battery cells 102 described above. The housing 10 can have various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. The shape of the housing 10 can be determined based on the shape and size of the battery cells 102. The housing 10 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0059] In the embodiment of the present application, when the battery cell 102 is substantially rectangular, the receiving cavity 11 is also substantially rectangular, so that the utilization rate of the receiving cavity 11 is higher, thereby improving the energy density of the battery.

[0060] In an embodiment of the present application, the mounting beam 20 is located on at least one side of the box body 10 along the second direction Y, which can be characterized as one side of the box body 10 along the second direction Y having the mounting beam 20, or both opposite sides of the box body 10 along the second direction Y having the mounting beam 20.

[0061] Exemplarily, the mounting beam 20 extends along the first direction X, which can be characterized as the mounting beam 20 being in a long strip shape, with its length direction being parallel to the first direction X.

[0062] In the embodiment of the present application, the mounting beam 20 and the box side wall 12 of the box body 10 can be connected by bolts and nuts. For example, the bolts pass through the mounting beam 20 and the box side wall 12 in sequence and are then threadedly connected to the nuts. Alternatively, the mounting beam 20 and the box side wall 12 of the box body 10 can be connected by welding. For example, along the first direction X, there are multiple connection points between the mounting beam 20 and the box side wall 12 of the box body 10 to improve the firmness of the connection between the mounting beam 20 and the box side wall 12 of the box body 10.

[0063] In the embodiment of the present application, the mounting beam 20 can be connected to the bottom wall 13 of the box body 10 by bolts and nuts, or the mounting beam 20 can be connected to the box side wall 12 of the box body 10 by welding. For example, there are multiple connection points between the mounting beam 20 and the box bottom wall 13 of the box body 10 along the first direction X to improve the firmness of the connection between the mounting beam 20 and the box bottom wall 13 of the box body 10.

[0064] In the embodiment of the present application, the mounting beam 20 is connected to the side wall 12 of the box body 10, achieving a first-level connection between the mounting beam 20 and the box body 10. The mounting beam 20 is connected to the bottom wall 13 of the box body 10, achieving a second-level connection between the mounting beam 20 and the box body 10, thereby improving the firmness of the connection between the box body 10 and the mounting beam 20. When the battery box provided by the embodiment of the present application is installed in an electrical device, the possibility of the battery box falling off the electrical device can be reduced, thereby improving the stability of the electrical device.

[0065] According to some embodiments of the present application, Figure 5 Schematic diagram of the structure of the battery box of other embodiments of the present application. Figure 6 Exploded views of battery boxes according to other embodiments of the present application. Figure 7 1 is a top view of a battery box according to some other embodiments of the present application. Figure 8 For this application Figure 7 Cross-section of the AA plane. Figures 5 to 8 The mounting beam 20 has a first flange 21 extending along the first direction X. The first flange 21 is located on a side of the box bottom wall 13 away from the accommodating cavity 11 , and the first flange 21 is connected to the box bottom wall 13 .

[0066] In an embodiment of the present application, the size of the first flange 21 along the first direction X is the same as the size of the mounting beam 20 along the first direction X, so that the size of the first flange 21 along the first direction X is large enough, and more first flanges 21 are connected to the bottom wall 13 of the box, further improving the firmness of the connection between the mounting beam 20 and the box body 10; at the same time, there will be no redundant first flanges 21 to increase the volume and weight of the battery box.

[0067] See also Figures 5 to 8 The mounting beam 20 includes a mounting portion 26, wherein the mounting portion 26 is used to connect to the electrical device, and the battery box is mounted on the electrical device through the mounting portion 26. For example, the mounting portion 26 is located at the end of the mounting beam 20 away from the box body 10, which can avoid the impact of the box body 10 on the mounting portion 26 to a certain extent.

[0068] In an embodiment of the present application, the free end of the first flange 21 faces the accommodating cavity 11. When the box body 10 has mounting beams 20 on both opposite sides along the second direction Y, the distance between the first flanges 21 of the two mounting beams 20 along the second direction Y is smaller than the size of the box bottom wall 13 along the second direction Y, so that the two first flanges 21 can support the box body 10, which can reduce the possibility of separation between the mounting beams 20 and the box body 10 and improve the firmness of the connection between the mounting beams 20 and the box body 10.

[0069] In an embodiment of the present application, a first flange 21 is provided on the mounting beam 20 to provide an installation position for the mounting beam 20 and the box bottom wall 13. At the same time, the two first flanges 21 can support the box body 10, thereby reducing the possibility of separation between the mounting beam 20 and the box body 10 and improving the firmness of the connection between the mounting beam 20 and the box body 10.

[0070] According to some embodiments of the present application, see Figure 8 The box body 10 has a second flange 14 extending toward the outside of the accommodating cavity 11, and the second flange 14 is connected to the box side wall 12. The mounting beam 20 has a beam side wall 22 extending along the first direction X, and the beam side wall 22 is in contact with and connected to the box side wall 12 and the second flange 14.

[0071] In an embodiment of the present application, the size of the second flange 14 along the first direction X is greater than or equal to the size of the mounting beam 20 along the first direction, so that the size of the second flange 14 along the first direction X is large enough, and more second flanges 14 are connected to the beam side walls 22 of the mounting beam 20, further improving the firmness of the connection between the mounting beam 20 and the box body 10.

[0072] In the embodiment of the present application, the second flange 14 may surround the opening of the accommodating cavity 11 , that is, the second flange 14 is annular.

[0073] In an embodiment of the present application, by providing a second flange 14 on the box body 10, and the beam side wall 22 of the mounting beam 20 is fitted and connected to the second flange 14 of the box body 10, a third layer connection between the mounting beam 20 and the box body 10 is achieved, which can improve the firmness of the connection between the box body 10 and the mounting beam 20.

[0074] According to some embodiments of the present application, Figures 5 to 8 The battery box also includes an end cover 30 and a connector 40 . The end cover 30 covers the opening of the accommodating cavity 11 . One end of the connector 40 passes through the end cover 30 and the second flange 14 in sequence and is connected to the beam side wall 22 .

[0075] In the embodiments of the present application, the end cap 30 refers to a component that covers the opening of the accommodating cavity 11 of the housing 10 to isolate the internal environment of the battery cell from the external environment. Without limitation, the shape of the end cap 30 can be adapted to the shape of the housing 10 to match the housing 10. Optionally, the end cap 30 can be made of a material with a certain hardness and strength. In this way, the end cap 30 is less likely to deform when squeezed or collided, so that the battery can have higher structural strength and improved safety performance. The end cap 30 can also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0076] In an embodiment of the present application, the connecting member 40 is used to connect the box body 10, the mounting beam 20 and the end cover 30. The second flange 14 surrounds the opening of the accommodating cavity 11. The connecting member 40 can be arranged in a ring around the opening of the accommodating cavity 11, so that there are more connection points between the box body 10, the mounting beam 20 and the end cover 30, and the connection is more secure.

[0077] In the embodiment of the present application, an end cap 30 is provided to cover the opening of the accommodating cavity 11 to protect the battery cells located in the accommodating cavity 11 and improve the stability of the battery. A connector 40 is provided to connect the box body 10 and the end cap 30 to improve the firmness of the connection between the end cap 30 and the box body 10. At the same time, the connector 40 connects the box body 10 and the beam sidewall 22, which can also improve the firmness of the connection between the box body 10 and the mounting beam 20.

[0078] According to some embodiments of the present application, Figure 9 Partial cross-sectional schematic diagram of battery boxes according to other embodiments of the present application. Figure 10 Partial cross-sectional schematic diagram of battery boxes according to other embodiments of the present application. Figure 11 Partial cross-sectional schematic diagram of battery boxes according to other embodiments of the present application. Figure 12 Partial cross-sectional schematic diagram of battery boxes according to other embodiments of the present application. Figure 13 This is a partial cross-sectional schematic diagram of a battery box in some other embodiments of the present application. Figures 9 to 13 The bottom wall 13 of the battery box has a first mounting groove 131, which opens toward the side of the bottom wall 13 away from the accommodating cavity 11. The battery box also includes a bottom guard plate 50 and a thermal management component 60. The bottom guard plate 50 is located on the side of the bottom wall 13 away from the accommodating cavity 11 and is connected to the box body 10. The thermal management component 60 is located between the bottom guard plate 50 and the box body 10, with at least a portion of the thermal management component 60 located in the first mounting groove 131.

[0079] In an embodiment of the present application, the shape of the bottom guard plate 50 is the same as the shape of the bottom wall 13 of the box, so that the bottom guard plate 50 can cover the bottom wall 13 of the box without taking up much other space, thereby reducing the impact on the volume and weight of the battery box, and thus reducing the impact on the battery energy density.

[0080] Exemplarily, a cavity for placing the thermal management component 60 is provided between the bottom guard plate 50 and the box body 10 , and the thermal management component 60 is located in the cavity.

[0081] In an embodiment of the present application, the thermal management component 60 may include a pipeline, and thermal management of the battery cell is achieved by transporting a thermal management liquid into the pipeline and exchanging heat between the thermal management liquid and the battery cell.

[0082] In an embodiment of the present application, a bottom guard plate 50 is provided to protect the bottom wall 13 of the box. When the bottom of the battery box is hit or bumped, the bottom guard plate 50 can provide buffering protection for the bottom wall 13 of the box, thereby improving the reliability of the battery box. At the same time, it can also protect the battery cells located in the accommodating cavity 11, thereby improving the reliability of the battery. A thermal management component 60 is provided to perform thermal management on the battery cells located in the accommodating cavity 11. When the temperature of the battery cells is too low, the thermal management component 60 can be used to heat the battery cells; when the temperature of the battery cells is too high, the thermal management component 60 can be used to cool the battery cells so that the battery cells are at a suitable operating temperature to improve the stability of the battery operation. At the same time, a first mounting groove 131 is provided on the bottom wall 13 of the box, and the first mounting groove 131 provides an installation space for the thermal management component 60.

[0083] In some embodiments of the present application, the first flange 21 is located between the bottom wall 13 of the box and the bottom guard plate 50, so that the bottom guard plate 50 can also protect the first flange 21, reducing the possibility of failure of the connection point between the first flange 21 and the bottom wall 13 of the box due to impact or collision, thereby improving the firmness of the connection between the box body 10 and the mounting beam 20.

[0084] According to some embodiments of the present application, see Figures 9 to 13 The battery box also includes a buffer 80, which is located between the box body 10 and the bottom guard plate 50. The buffer 80 has a second mounting groove 81 that corresponds one-to-one with the first mounting groove 131. The second mounting groove 81 and the first mounting groove 131 overlap with each other to form an installation space 82, and the thermal management component 60 is located in the installation space 82.

[0085] Combine Figure 3 、 Figure 4 、 Figure 6 and Figures 9 to 13 The shape of the first mounting groove 131 in the bottom wall 13 of the box matches the shape of the thermal management component 60, so that the shape of the mounting space 82 formed by the second mounting groove 81 and the first mounting groove 131 covering each other matches the shape of the thermal management component 60. The thermal management component 60 can be installed without occupying the space of other components, which can avoid the impact on the battery energy density to a certain extent.

[0086] In the embodiment of the present application, when the battery box is impacted, the buffer member 80 can provide a buffer to protect the battery cells or the thermal management component 60, thereby reducing the possibility of damage to the battery cells or the thermal management component 60 and improving the reliability of the battery.

[0087] According to some embodiments of the present application, the material of the buffer member 80 includes at least one of foam and rigid polyurethane (RPU).

[0088] Illustratively, the material of the buffer component 80 includes foam; or the material of the buffer component 80 includes hard polyurethane; or the material of the buffer component 80 includes both foam and hard polyurethane.

[0089] Foam and hard polyurethane have good cushioning properties, so that the buffer member 80 has good cushioning properties. At the same time, foam and hard polyurethane are both relatively easy to obtain materials and are cheap, which reduces the cost of making the battery box.

[0090] According to some embodiments of the present application, see Figure 4 and Figure 6 The battery box also includes an expansion beam 70, which extends along the second direction Y. The expansion beam 70 is located in the accommodating cavity 11, and the opposite ends of the expansion beam 70 along the second direction Y are respectively connected to the box side wall 12.

[0091] Exemplarily, the battery box may include two expansion beams 70 , and the two expansion beams 70 are located at both ends of the accommodating cavity 11 along the first direction X.

[0092] Exemplarily, the expansion beam 70 extends along the second direction Y, which can be characterized as the expansion beam 70 being in a long strip shape, with its length direction parallel to the second direction Y.

[0093] In the embodiment of the present application, the expansion beam 70 and the box side wall 12 may be connected by welding, or the expansion beam 70 and the box side wall 12 may be connected by bolts and nuts.

[0094] Exemplarily, the expansion beam 70 may be manufactured by rolling.

[0095] In the embodiment of the present application, the expansion beams 70 are connected to the sidewalls 12 at opposite ends along the second direction Y. When the sidewalls 12 of the battery box deform, the expansion beams 70 provide a blocking effect, thereby reducing deformation of the sidewalls 12 and increasing the overall strength of the battery box. Furthermore, the expansion beams 70 can counteract the battery cells in the accommodating cavity 11, resisting the expansion force of the battery cells when they expand, reducing deformation of the battery cells and improving battery stability.

[0096] According to some embodiments of the present application, the mounting beam 20 is an integrally formed beam, and the mounting beam 20 is welded to both the box side wall 12 and the box bottom wall 13 .

[0097] For example, the mounting beam 20 can be integrally formed by roller pressing. Roll pressing is a process in which roller pressure is applied to the surface of a metal sheet, causing it to plastically deform under the applied force, thereby changing its shape. Roll pressing machinery is typically used to plastically process the metal sheet by adjusting the spacing between rollers and the shape of the rollers.

[0098] For example, Figure 8 Taking the illustrated mounting beam 20 as an example, the rolling process of an exemplary mounting beam 20 in an embodiment of the present application is explained. Figure 14 This is a process diagram of rolling of some embodiments of the present application. Figure 14 First, roll out the bottom shape of the rolled beam, then roll out the first shape 1 on the left and the second shape 2 on the right, and weld them at the first point 3 and the second point 4; then roll them inward respectively so that the third point 5 at the first shape 1 and the fourth point 6 at the second shape 2 contact to form the fifth point 7, and weld them at the fifth point 7.

[0099] For example, the mounting beam 20 may be connected to the box side wall 12 and the box bottom wall 13 by at least one of friction welding and resistance welding.

[0100] The one-piece beam has high strength, and one-piece molding is a relatively convenient process for manufacturing the mounting beam 20, making the manufacturing process simpler. The mounting beam 20 is connected to the box side wall 12, and the mounting beam 20 is connected to the box bottom wall 13 by welding, without the need for additional connectors, reducing the impact on the battery energy density. Welding is a relatively strong connection method that is not prone to failure, making the connection between the mounting beam 20 and the box body 10 more secure. At the same time, the welding process is simple, which can simplify the production process of the battery box and improve production efficiency.

[0101] According to some embodiments of the present application, the first flange 21 of the mounting beam 20 is welded to the box bottom wall 13 .

[0102] In an embodiment of the present application, the first flange 21 of the mounting beam 20 and the box bottom wall 13 may be welded by resistance welding or friction welding.

[0103] In the embodiment of the present application, the first flange 21 of the mounting beam 20 is welded to the box bottom wall 13 , so that the connection between the first flange 21 and the box bottom wall 13 is more secure.

[0104] According to some embodiments of the present application, see Figure 8 The first side wall 24 of the mounting beam 20 is welded to the box side wall 12 , and the second side wall 25 of the mounting beam 20 has a through-welding hole 251 , which is opposite to the welding point between the first side wall 24 and the box body 10 .

[0105] In the embodiment of the present application, the beam side wall 22 includes a first side wall 24 and a second side wall 25 .

[0106] In the embodiment of the present application, the through-weld hole 251 is opposite to the weld between the first side wall 24 and the box body 10. This can be characterized as the orthographic projection of the through-weld hole 251 on the first surface at least partially overlapping with the orthographic projection of the weld between the first side wall 24 and the box body 10 on the first surface, that is, the orthographic projection of the through-weld hole 251 on the first surface completely overlapping with the orthographic projection of the weld between the first side wall 24 and the box body 10 on the first surface; or the orthographic projection of the through-weld hole 251 on the first surface partially overlapping with the orthographic projection of the weld between the first side wall 24 and the box body 10 on the first surface. The first surface is perpendicular to the second direction Y.

[0107] In the embodiment of the present application, the first side wall 24 of the mounting beam 20 is welded to the box side wall 12, which simplifies the process and simplifies the production process of the battery box. Welding holes 251 are provided on the second side wall 25 of the mounting beam 20, and the connection between the first side wall 24 and the box side wall 12 can be welded through the welding holes 251, thereby facilitating the connection between the first side wall 24 and the box side wall 12.

[0108] Combine Figure 8 and Figure 14 The through-welding hole 251 on the second side wall 25 can be opened at a position corresponding to the through-welding hole 251 on the second side wall 25 after rolling is completed to form the through-welding hole 251; or a hole can be opened at a position corresponding to the through-welding hole 251 on the second side wall 25 after welding at the second point 4 is completed to form the through-welding hole 251.

[0109] Among them, for Figures 9 to 13 The mounting beam may also be provided with a welding hole 251 at a position corresponding to the second side wall 25 so as to facilitate welding of the first side wall 24 and the box body 10 through the welding hole 251 .

[0110] According to some embodiments of the present application, the mounting beam 20 has a plurality of buffer cavities 23, and the plurality of buffer cavities 23 include a first sub-buffer cavity 231, the first sub-buffer cavity 231 is close to the opening of the accommodating cavity 11, and the first side wall 24 and the second side wall 25 are located on opposite sides of the first sub-buffer cavity 231 along the second direction Y.

[0111] In the embodiment of the present application, when the mounting beam 20 is impacted, the buffer cavity 23 of the mounting beam 20 can provide a buffer, so that less impact is transmitted to the box body 10 , thereby protecting the box body 10 .

[0112] See also Figure 8The first sub-buffer cavity 231 is the topmost buffer cavity 23 among the multiple buffer cavities 23. The first sub-buffer cavity 231 can be square in shape so that the sidewalls corresponding to the edges of the first sub-buffer cavity 231 can be connected to the box body 10. For example, one sidewall corresponding to the edge of the first sub-buffer cavity 231 is connected to the second flange 14, and the other sidewall corresponding to the edge of the first sub-buffer cavity 231, namely the first sidewall 24, is connected to the box sidewall 12.

[0113] An embodiment of the present application provides a battery, which includes the battery box of any one of the above embodiments.

[0114] In the embodiment of the present application, after the battery is connected to the electrical device, the possibility of the battery box falling off the electrical device can be reduced, thereby improving the stability of the electrical device and the battery.

[0115] An embodiment of the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy.

[0116] The present invention provides an electric device that uses a battery as a power source. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0117] In the electric device provided in the embodiment of the present application, the possibility of the battery box falling off the electric device can be reduced, thereby improving the stability of the electric device.

[0118] An embodiment of the present application provides a battery box, which includes a box body 10, a mounting beam 20, an end cover 30, a connector 40, a bottom guard plate 50, a thermal management component 60, an expansion beam 70 and a buffer 80.

[0119] The box body 10 has a receiving cavity 11. The mounting beam 20 extends along a first direction X and is located on both sides of the box body 10 along a second direction Y, where the first direction X intersects the second direction Y. The mounting beam 20 is connected to the side of the box sidewall 12 of the box body 10 that is away from the receiving cavity 11. The mounting beam 20 has a first flange 21 extending along the first direction X. The first flange 21 is located on the side of the box bottom wall 13 that is away from the receiving cavity 11 and is connected to the side of the box bottom wall 13 that is away from the receiving cavity 11.

[0120] The box body 10 has a second flange 14 facing outward from the accommodating cavity 11, and the second flange 14 is connected to the box sidewall 12. The mounting beam 20 has a beam sidewall 22 extending along the first direction X, and the beam sidewall 22 is aligned with and connected to the box sidewall 12 and the second flange 14. The end cap 30 covers the opening of the accommodating cavity 11 and is connected to the box body 10. One end of the connector 40 passes through the end cap 30 and the second flange 14 in sequence and is connected to the beam sidewall 22.

[0121] The bottom wall 13 of the box has a first mounting groove 131, the opening of the first mounting groove 131 facing the side of the bottom wall 13 away from the accommodating cavity 11. The bottom guard plate 50 is located on the side of the bottom wall 13 away from the accommodating cavity 11, and the bottom guard plate 50 is connected to the box body 10. The thermal management component 60 is located between the bottom guard plate 50 and the box body 10, and at least a portion of the thermal management component 60 is located in the first mounting groove 131. The buffer member 80 is located between the box body 10 and the bottom guard plate 50, and the buffer member 80 has a second mounting groove 81 corresponding to the first mounting groove 131. The second mounting groove 81 and the first mounting groove 131 overlap to form an installation space 82, and the thermal management component 60 is located in the installation space 82. The expansion beam 70 extends along the second direction Y, is located in the accommodating cavity 11, and the expansion beam 70 is connected to the box side wall 12 at its opposite ends along the second direction Y.

[0122] The mounting beam 20 is an integrally formed beam, welded to both the box sidewalls 12 and the box bottom wall 13. The first flange 21 of the mounting beam 20 is welded to the box bottom wall 13. The first sidewall 24 of the mounting beam 20 is welded to the box sidewall 12, and the second sidewall 25 of the mounting beam 20 has a through-weld hole 251, which is opposite the weld between the first sidewall 24 and the box body 10. The mounting beam 20 has multiple buffer cavities 23, including a first sub-buffer cavity 231, which is located near the opening of the accommodating cavity 11. The first sidewall 24 and the second sidewall 25 are located on opposite sides of the first sub-buffer cavity 231 along the second direction Y.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery box, characterized in that: The battery box includes: A box body (10) having a receiving cavity (11); A mounting beam (20) extends along a first direction X, the mounting beam (20) is located on at least one side of the box body (10) along a second direction Y, the mounting beam (20) is connected to a side of a box side wall (12) and a box bottom wall (13) of the box body (10) away from the accommodating cavity (11), and the first direction X intersects with the second direction Y.

2. The battery box according to claim 1, characterized in that: The mounting beam (20) has a first flange (21) extending along the first direction X, the first flange (21) is located on a side of the box bottom wall (13) away from the accommodating cavity (11), and the first flange (21) is connected to the box bottom wall (13).

3. The battery box according to claim 1 or 2, characterized in that: The box body (10) has a second flange (14) extending toward the outside of the accommodating cavity (11), and the second flange (14) is connected to the box side wall (12); the mounting beam (20) has a beam side wall (22) extending along the first direction X, and the beam side wall (22) is in contact with and connected to the box side wall (12) and the second flange (14).

4. The battery box according to claim 3, characterized in that: The battery box also includes: an end cover (30) covering the opening of the accommodating cavity (11); A connecting member (40), one end of which passes through the end cover (30) and the second flange (14) in sequence and is connected to the beam side wall (22).

5. The battery box according to any one of claims 1 to 4, characterized in that: The box bottom wall (13) has a first mounting groove (131), the opening of the first mounting groove (131) faces the side of the box bottom wall (13) away from the accommodating cavity (11), and the battery box further comprises: A bottom guard plate (50) is located on a side of the box bottom wall (13) away from the accommodating cavity (11), and the bottom guard plate (50) is connected to the box body (10); A heat management component (60) is located between the bottom guard plate (50) and the box bottom wall (13), and at least a portion of the heat management component (60) is located in the first mounting groove (131).

6. The battery box according to claim 5, characterized in that: The battery box also includes: A buffer member (80) is located between the box body (10) and the bottom guard plate (50), the buffer member (80) having a second mounting groove (81) corresponding to the first mounting groove (131), the second mounting groove (81) and the first mounting groove (131) overlapping each other to form an installation space (82), and the thermal management component (60) is located in the installation space (82).

7. The battery box according to claim 6, characterized in that: The material of the buffer member (80) includes at least one of foam and hard polyurethane.

8. The battery box according to any one of claims 1 to 7, characterized in that: The battery box also includes: An expansion beam (70) extends along the second direction Y. The expansion beam (70) is located in the accommodating cavity (11), and opposite ends of the expansion beam (70) along the second direction Y are respectively connected to the box side walls (12).

9. The battery box according to any one of claims 2 to 8, characterized in that: The mounting beam (20) is an integrally formed beam, and the mounting beam (20) is welded to both the box side wall (12) and the box bottom wall (13).

10. The battery box according to claim 9, characterized in that: The first flange (21) of the mounting beam (20) is welded to the box bottom wall (13).

11. The battery box according to claim 9, characterized in that: The first side wall (24) of the mounting beam (20) is welded to the box side wall (12), and the second side wall (25) of the mounting beam (20) has a through-welding hole (251), and the through-welding hole (251) is opposite to the welding point between the first side wall (24) and the box side wall (12).

12. The battery box according to claim 11, characterized in that: The mounting beam (20) has a plurality of buffer cavities (23), the plurality of buffer cavities (23) including a first sub-buffer cavity (231), the first sub-buffer cavity (231) being close to the opening of the accommodating cavity (11), and the first side wall (24) and the second side wall (25) being located on opposite sides of the first sub-buffer cavity (231) along the second direction Y.

13. A battery, characterized in that: The battery comprises the battery case according to any one of claims 1 to 12.

14. An electrical device, characterized in that: The electric device comprises the battery as claimed in claim 13, and the battery is used to provide electric energy.

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