Box body assembly, battery and electric device

Abstract

The utility model discloses a box body assembly, a battery and a power utilization device, the box body assembly comprises a frame, the frame comprises a bottom plate and side plates arranged around the periphery of the bottom plate, and the bottom plate and the side plates jointly form an accommodating cavity; the heat exchange beams are arranged in the containing cavity so as to divide the containing cavity into a plurality of containing sub-cavities, heat exchange channels allowing heat exchange media to flow are formed in the heat exchange beams, the heat exchange beams can improve the overall rigidity of the frame, and due to the fact that the heat exchange channels allowing the heat exchange media to flow are formed in the heat exchange beams, the heat exchange efficiency is improved; the heat exchange beam integrates a heat exchange function, and the space utilization rate of the box body assembly is improved, so that the energy density of the battery is improved.

Description

Technical Field

[0001] This application relates to the field of batteries, and more particularly to a housing assembly, a battery, and an electrical device. Background Technology

[0002] Currently, power batteries are widely used in various fields involving energy storage, and with the continuous expansion of their application areas, the market demand is also constantly increasing. To ensure the safe operation of power batteries, thermal management components are usually installed inside the battery housing to improve heat dissipation. However, in existing power batteries, thermal management components are typically located at the bottom of the housing, resulting in reduced space utilization, decreased battery energy density, and severely impacting battery performance.

[0003] Application content

[0004] In view of the above problems, this application provides a housing assembly, a battery and an electrical device, which is beneficial to improve the space utilization of the housing assembly while meeting heat dissipation requirements.

[0005] In a first aspect, this application provides a housing assembly, comprising: a frame, the frame including a bottom plate and side plates disposed around the bottom plate, the bottom plate and side plates together forming a receiving cavity; at least one heat exchange beam disposed within the receiving cavity to divide the receiving cavity into multiple receiving sub-cavities, and the heat exchange beam being provided with heat exchange channels for the flow of heat exchange medium.

[0006] In the technical solution of this application embodiment, after the battery cell is placed in the receiving cavity, the battery cell can exchange heat with the heat exchange beam to achieve heat dissipation or heating treatment of the battery cell. The heat exchange beam can not only improve the overall rigidity of the frame, but also integrate heat exchange function because the heat exchange beam is provided with heat exchange channels for the flow of heat exchange medium. When this kind of box assembly is applied to the battery, it can improve the space utilization rate inside the battery, thereby improving the energy density of the battery.

[0007] In conjunction with the first aspect, in some embodiments, the heat exchange beam includes: a beam body having opposing first and second sidewalls along its thickness direction; at least one first heat exchange plate disposed on the first sidewall; and / or, at least one second heat exchange plate disposed on the second sidewall. This structural design allows the beam body, the first heat exchange plate, and the second heat exchange plate to be formed separately and then assembled, reducing the forming difficulty of the heat exchange beam.

[0008] In conjunction with the first aspect, in some embodiments, the first sidewall is recessed to form at least one first receiving groove, and any one of the first heat exchange plates is disposed within one first receiving groove; and / or, the second sidewall is recessed to form at least one second receiving groove, and any one of the second heat exchange plates is disposed within one second receiving groove. This structural design can reduce the thickness of the heat exchange beam, thereby reducing the volume of the heat exchange beam and further improving the space utilization rate when this type of housing assembly is applied to a battery.

[0009] In conjunction with the first aspect, in some embodiments, the heat exchange beam includes a beam body and at least one heat exchange plate, wherein an installation cavity is provided within the beam body, and the heat exchange plate is disposed within the installation cavity. This structural design not only reduces the thickness of the heat exchange beam to improve space utilization when this type of housing assembly is used in batteries, but also improves the assembly efficiency of the heat exchange beam.

[0010] In conjunction with the first aspect, in some embodiments, the heat exchange beam further includes reinforcing ribs, which are connected between the heat exchange plate and the inner wall of the mounting cavity. This structural design not only increases the structural strength of the heat exchange beam but also serves to conduct heat, thereby improving the heat exchange performance between the beam and the heat exchange plate.

[0011] In conjunction with the first aspect, in some embodiments, a first flow channel for the heat exchange medium is provided within the base plate. This structural design allows both the base plate and the heat exchange beam to exchange heat with the battery cells separately after the battery cells are placed in the receiving cavity, thereby improving heat exchange performance.

[0012] In conjunction with the first aspect, in some embodiments, the housing assembly further includes at least one first heat exchange plate, and the first heat exchange plate is disposed on the surface of the base plate facing or away from the receiving cavity. This structural design allows the base plate and the first heat exchange plate to be molded separately and then assembled, reducing the molding difficulty of the base plate and the first heat exchange plate.

[0013] In conjunction with the first aspect, in some embodiments, the housing assembly further includes at least one first heat sink, and at least one first receiving cavity is provided within the base plate, with the first heat sink disposed within the first receiving cavity. This structural design not only reduces the thickness of the base plate to improve space utilization when the housing assembly is used in batteries, but also improves the assembly efficiency of the base plate and the first heat sink.

[0014] In conjunction with the first aspect, in some embodiments, the frame further includes a cover plate disposed at the end of the side plate away from the bottom plate to seal the receiving cavity. This structural design allows the housing assembly to form a closed housing structure, which helps protect the battery cells after they are placed inside the receiving cavity.

[0015] In conjunction with the first aspect, in some embodiments, a second flow channel for the heat exchange medium is provided within the cover plate. This structural design allows the individual battery cells to exchange heat with the cover plate, improving heat exchange performance.

[0016] In conjunction with the first aspect, in some embodiments, the housing assembly further includes at least one second heat sink, which is disposed on the surface of the cover facing or away from the receiving cavity. This structural design allows the cover and the second heat sink to be molded separately and then assembled, reducing the molding difficulty of the cover and the second heat sink.

[0017] In conjunction with the first aspect, in some embodiments, the housing assembly further includes at least one second heat sink, and the cover plate has at least one second receiving cavity, with the second heat sink disposed within the second receiving cavity. This structural design not only reduces the thickness of the cover plate to improve space utilization when the housing assembly is used in a battery, but also improves the assembly efficiency of the cover plate and the second heat sink.

[0018] Secondly, embodiments of this application provide a battery, including a battery cell and a housing assembly as described in any of the preceding claims, wherein a receiving cavity is provided for placing the battery cell.

[0019] In conjunction with the second aspect, in some embodiments, the heat exchange beam is configured as a heat exchange crossbeam and / or a heat exchange longitudinal beam, and the dimension of the battery cell along the height direction of the heat exchange beam is smaller than the dimension of the battery cell along the extension direction of the heat exchange beam and the dimension of the battery cell along the thickness direction of the heat exchange beam. This structural design allows the battery cells to be placed flat, resulting in a more uniform internal temperature of the battery cells and reducing the design requirements for the heat exchange beam in the height direction.

[0020] In conjunction with the second aspect, in some embodiments, the battery cell is equipped with a pressure relief mechanism, and the pressure relief mechanism faces the heat exchange beam. This structural design ensures that once the pressure relief mechanism is activated, the heat exchange beam can exchange heat with the high-temperature emissions, preventing prolonged heat accumulation at the emission point and avoiding potential safety hazards.

[0021] In conjunction with the second aspect, in some embodiments, each battery cell is arranged adjacent to at least one heat exchange beam, and the pressure relief mechanism faces at least one of the adjacent heat exchange beams. This structural design allows each battery cell to exchange heat with one or more adjacent heat exchange beams, improving the heat exchange effect.

[0022] In conjunction with the second aspect, in some embodiments, the battery cell is also provided with electrode terminals, and the electrode terminals and the pressure relief mechanism are respectively disposed on two adjacent or opposite surfaces of the battery cell. This structural design reduces the adverse effects of the pressure relief mechanism's ejection on the electrical connection area, such as short circuits and high-voltage arcing, because the electrode terminals and the pressure relief mechanism are located on different surfaces of the battery cell. Furthermore, since the pressure relief mechanism is oriented towards the heat exchange beam, i.e., the electrode terminals are not oriented towards the heat exchange beam, the risk of short circuits caused by the heat exchange medium is reduced when the heat exchange beam is damaged and leaks occur.

[0023] In conjunction with the second aspect, in some embodiments, the battery includes a battery pack consisting of a plurality of battery cells arranged along a first direction, and a heat exchange beam extending along the first direction. This structural design allows the heat exchange beam to extend along the length of the battery pack, simplifying the distribution of the heat exchange beam within the receiving cavity.

[0024] In conjunction with the second aspect, in some embodiments, a discharge chamber is provided within the heat exchange beam, which is suitable for receiving emissions from the battery cells' self-depressurization mechanisms. This structural design further integrates the function of collecting battery cell emissions into the heat exchange beam, making the internal structure of the battery more compact.

[0025] In conjunction with the second aspect, in some embodiments, the heat exchange beam is provided with at least one docking portion, and the discharge chamber is adapted to receive emissions from the battery cells via the self-depressurization mechanism. The docking portion can be a through-hole structure or a weak-section structure, both of which can be used to receive emissions into the discharge chamber when the depressurization mechanism is actuated, thereby improving safety.

[0026] In conjunction with the second aspect, in some embodiments, there are multiple docking sections, and these multiple docking sections are spaced apart along a first direction on the heat exchange beam. Each docking section is configured to correspond to the pressure relief mechanism of at least one battery cell. The docking section can be a through-hole connecting to the discharge chamber, or it can be a weak structural element that allows emissions or pressure breaches within the housing to enter the discharge chamber. The corresponding arrangement can be such that the two are relatively close, or that the docking section and the pressure relief mechanism are positioned opposite each other in a certain direction, facilitating the rapid entry of emissions from the pressure relief mechanism into the discharge chamber via the docking section.

[0027] In conjunction with the second aspect, in some embodiments, there are multiple rows of battery packs, with at least two of the multiple rows stacked along the height direction of the heat exchange beam. This structural design allows multiple rows of battery packs arranged along both the height and thickness directions of the heat exchange beam to be placed within any one receiving sub-cavity, improving the space utilization of the housing assembly.

[0028] In conjunction with the second aspect, in some embodiments, the heat exchange beam is provided with multiple docking portions spaced apart along its height direction, wherein any one docking portion is configured to correspond to the pressure relief mechanism of at least one battery cell. The docking portion can be a through hole connecting to the discharge chamber or a weak structural part, through which discharged material or gas pressure inside the chamber can enter the discharge chamber after being breached. The corresponding arrangement can be such that the two are relatively close to each other, or the docking portion and the pressure relief mechanism can be arranged opposite each other in a certain direction, so that the discharged material from the pressure relief mechanism can quickly enter the discharge chamber through the docking portion.

[0029] In conjunction with the second aspect, in some embodiments, there are multiple rows of battery packs, with at least two of these rows arranged side-by-side along a second direction, perpendicular to the first direction. In this second direction, a heat exchange beam is provided between at least some of the adjacent battery packs. This structural design allows for the provision of heat exchange beams between any two adjacent battery packs in the second direction, thereby improving heat exchange efficiency. Alternatively, heat exchange beams can be provided between some adjacent battery packs, while not between others, thus reducing the number of heat exchange beams while maintaining heat exchange efficiency and improving the space utilization of the housing assembly.

[0030] In conjunction with the second aspect, in some embodiments, the battery cell is a cylindrical battery cell, and the axial direction of the battery cell is parallel to the height direction of the heat exchange beam. A plurality of first limiting grooves are formed in the recessed first sidewall, and a plurality of second limiting grooves are formed in the recessed second sidewall. Any one of the first limiting grooves abuts against the outer peripheral surface of a battery cell, and any one of the second limiting grooves abuts against the outer peripheral surface of a battery cell. This structural design not only limits the movement of the battery cell but also increases the heat transfer area between the battery cell and the heat exchange beam, thereby improving heat exchange performance.

[0031] Thirdly, embodiments of this application provide an electrical device including a battery as described in any of the foregoing claims, the battery being used to provide electrical energy.

[0032] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0034] Figure 1 This is a structural schematic diagram of a vehicle provided for some embodiments of this application.

[0035] Figure 2 This is an exploded structural diagram of a battery provided for some embodiments of this application.

[0036] Figure 3 This is a structural schematic diagram of a housing assembly provided for some embodiments of this application.

[0037] Figure 4 This is a schematic diagram of another housing assembly provided in some embodiments of this application.

[0038] Figure 5 This is a schematic diagram of the structure of a heat exchange beam provided for some embodiments of this application.

[0039] Figure 6 for Figure 5 The diagram shows the heat exchange beam from another angle.

[0040] Figure 7 for Figure 5 The diagram shows the structural schematic of the beam in the heat exchange beam.

[0041] Figure 8 for Figure 7 The diagram shows the structure of the beam at another angle.

[0042] Figure 9 This is a schematic diagram of another heat exchange beam provided in some embodiments of this application.

[0043] Figure 10 for Figure 2 The diagram shows the assembly relationship between the battery pack and the heat exchange beam in the battery.

[0044] Figure 11 for Figure 2 The diagram shows another assembly relationship between the battery pack and the heat exchange beam in the battery.

[0045] Figure 12 The diagram shows the structure of a single battery cell provided in some embodiments of this application.

[0046] Figure 13 This is a partial structural diagram of another battery provided in some embodiments of this application.

[0047] Figure 14 for Figure 13 The diagram shows the structure of the heat exchange beam in the battery.

[0048] Figure 15 for Figure 14 The diagram shows the heat exchange beam from another angle.

[0049] Figure label:

[0050] 1000 - Vehicles;

[0051] 100 - Battery; 200 - Controller; 300 - Motor;

[0052] 1- Enclosure assembly;

[0053] 11-Frame; 111-Base plate; 112-Side plate; 113-Cover plate; 12-Heat exchange beam; 121-Beam body; 1211-First side wall; 1212-Second side wall; 1213-First receiving groove; 1214-Second receiving groove; 1215-Mounting cavity; 1216-Reinforcing rib; 1217-First limiting groove; 1218-Second limiting groove; 122-Heat exchange plate; 1221-First heat exchange plate; 1222-Second heat exchange plate; 123-Dating part; 13-Receiving cavity; 131-Receiving sub-cavity;

[0054] 2-Battery busbar;

[0055] 21-Battery pack; 211-Battery cell; 212-Electrode terminal; 213-Pressure relief mechanism. Detailed Implementation

[0056] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0058] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0059] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0060] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0061] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0062] In the description of the embodiments of this application, the technical 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" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0063] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0064] In the description of the embodiments in this application, the direction indicated by arrow X in all the figures is the length direction, the direction indicated by arrow Y is the width direction, and the direction indicated by arrow Z is the vertical direction. The horizontal direction is parallel to the horizontal plane, and can be either the aforementioned length direction or the aforementioned width direction. Furthermore, the horizontal direction includes not only directions absolutely parallel to the horizontal plane, but also directions generally parallel to the horizontal plane as commonly understood in engineering. The vertical direction is perpendicular to the horizontal plane, and includes not only directions absolutely perpendicular to the horizontal plane, but also directions generally perpendicular to the horizontal plane as commonly understood in engineering. In addition, the directional terms such as "upper," "lower," "top," and "bottom" used in this application are all understood relative to the vertical direction.

[0065] For ease of understanding and explanation, the directions will be described below according to the X, Y, and Z coordinate system in the attached diagram.

[0066] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0067] A power battery typically consists of a housing assembly and multiple battery cells connected in series, parallel, or a combination thereof. Based on the spatial arrangement of the battery cells, power batteries can be mainly categorized into upright, side-mounted, and horizontally positioned types. A power battery generally comprises multiple battery banks, where each battery bank contains multiple battery cells arranged horizontally.

[0068] The inventors have noted that, in order to ensure the safe operation of power batteries, thermal management components are typically installed at the bottom of existing battery housings. These components exchange heat with the individual battery cells to improve heat dissipation. However, the thermal management components occupy a certain amount of internal space within the housing, reducing space utilization, lowering battery energy density, and severely impacting battery performance.

[0069] To address the aforementioned technical issues, the applicant discovered that existing battery pack assemblies typically incorporate a central beam, which separates adjacent battery banks and enhances the structural strength of the assembly. Therefore, thermal management components can be integrated onto the surface or within the central beam, enabling it to function as a heat exchanger, thereby improving the space utilization of the battery pack and ultimately increasing battery energy density.

[0070] The enclosure assembly disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system comprising the enclosure assembly and battery disclosed in this application can be used to form such an electrical device, which helps to improve the space utilization rate of the enclosure assembly, thereby increasing the battery energy density.

[0071] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0072] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0073] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery 100 is disposed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the 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 supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, or driving.

[0074] In some embodiments of this application, the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or gas to provide driving power for the vehicle 1000.

[0075] Please refer to Figure 2 and Figure 3 , Figure 2 This is an exploded structural diagram of a battery 100 provided in some embodiments of this application. Figure 3This is a schematic diagram of the structure of a housing assembly 1 provided in some embodiments of this application. The housing assembly 1 includes at least a frame 11 and at least one heat exchange beam 12. The frame 11 includes a bottom plate 111 and side plates 112 arranged around the bottom plate 111. The bottom plate 111 and the side plates 112 together form a receiving cavity 13. The heat exchange beam 12 is disposed in the receiving cavity 13 to divide the receiving cavity 13 into multiple receiving sub-cavities 131, and the heat exchange beam 12 is provided with heat exchange channels for the flow of heat exchange medium.

[0076] Since the side plates 112 are arranged around the base plate 111, the base plate 111 and the side plates 112 together form a receiving cavity 13, that is, the frame 11 is used to provide a receiving space for the battery cell 211. The frame 11 can adopt various structures. The frame 11 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the frame 11 is not easily deformed when subjected to compression and impact, so that the housing assembly 1 can have higher structural strength and improve safety performance. The shape of the frame 11 can also be various, such as cylinder, cuboid, or hexahedron. The material of the frame 11 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and there are no special limitations on this in the embodiments of this application.

[0077] Because the heat exchange beam 12 is disposed within the receiving cavity 13, the receiving cavity 13 can be divided into multiple receiving sub-cavities 131 by the heat exchange beam 12, and any one receiving sub-cavity 131 can accommodate one or more battery cells 211. Since the heat exchange beam 12 is provided with heat exchange channels for the flow of the heat exchange medium, the heat exchange beam 12 can exchange heat with the battery cells 211, thereby achieving heating or cooling of the battery 100, ensuring the safe operation of the battery 100. Furthermore, when the battery cell 211 ejects heat, high-temperature emissions can easily accumulate inside the battery 100. The flow of the heat exchange medium within the heat exchange beam 12 can continuously dissipate the accumulated heat, preventing the high-temperature accumulation from adversely affecting the internal structure of the battery 100. The heat exchange medium can be any one or more of water, air, tetrafluoroethane, trifluoromethane, difluoroethane, etc. The number of heat exchange channels provided in the heat exchange beam 12 can be one or more. The material of the heat exchange beam 12 can be the same as or different from that of the frame 11. In this embodiment of the application, no special restrictions are imposed on this.

[0078] Alternatively, please refer to Figure 4 , Figure 4This is a schematic diagram of another housing assembly 1 provided in some embodiments of this application. A portion of the heat exchange beams 12 extends along the X-axis, and another portion extends along the Y-axis, dividing the receiving cavity 13 into multiple receiving sub-cavities 131 arranged in a grid pattern. This ensures that multiple surfaces of at least one battery cell 211 correspond to a heat exchange beam 12 for heat exchange, thereby increasing the heat exchange area between the battery cell 211 and the heat exchange beams 12 and improving the heat exchange effect.

[0079] Understandably, all heat exchange beams 12 can extend only along the X-axis or the Y-axis.

[0080] After the battery cell 211 is placed in the receiving cavity 13, the battery cell 211 can exchange heat with the heat exchange beam 12 to achieve heat dissipation or heating treatment of the battery cell 211. The heat exchange beam 12 can not only improve the overall rigidity of the frame 11, but also integrate heat exchange function because the heat exchange beam 12 is provided with heat exchange channels for the flow of heat exchange medium. This improves the space utilization rate when the box assembly 1 is applied to the battery 100, thereby improving the energy density of the battery 100.

[0081] Optionally, according to some embodiments of this application, please refer to Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the structure of a heat exchange beam 12 provided in some embodiments of this application. Figure 6 for Figure 5 The diagram shows the heat exchange beam 12 from another angle. The heat exchange beam 12 includes: a beam body 121 having opposing first sidewalls 1211 and second sidewalls 1212 along its thickness direction; at least one first heat exchange plate 1221 disposed on the first sidewall 1211; and / or, at least one second heat exchange plate 1222 disposed on the second sidewall 1212.

[0082] The heat exchange plate 122 may be disposed only on the first sidewall 1211 or the second sidewall 1212; or, a portion of the heat exchange plates 122 may be disposed on the first sidewall 1211, and another portion of the heat exchange plates 122 may be disposed on the second sidewall 1212. The heat exchange plates 122 disposed on the first sidewall 1211 are the first heat exchange plates 1221, and the heat exchange plates 122 disposed on the second sidewall 1212 are the second heat exchange plates 1222. The number of heat exchange plates 122 disposed on the first sidewall 1211 and / or the second sidewall 1212 may be one or more. Any heat exchange plate 122 may be disposed on the first sidewall 1211 or the second heat exchange plate 1222 by welding, adhesion, threaded connection, plug-in connection, or any other arbitrary method. This embodiment of the application does not impose any special limitations on this.

[0083] By setting the first heat exchange plate 1221 on the first side wall 1211 and / or setting the second heat exchange plate 1222 on the second side wall 1212, the beam 121, the first heat exchange plate 1221 and the second heat exchange plate 1222 can be formed separately and then assembled, which reduces the forming difficulty of the heat exchange beam 12.

[0084] Optionally, according to some embodiments of this application, please refer to Figure 7 and Figure 8 , Figure 7 for Figure 5 The diagram shows the structure of beam 121 in the heat exchange beam 12. Figure 8 for Figure 7 The diagram shows the beam 121 from another angle. The first sidewall 1211 is recessed to form at least one first receiving groove 1213, and any one of the first heat exchange plates 1221 is disposed in one of the first receiving grooves 1213; and / or, the second sidewall 1212 is recessed to form at least one second receiving groove 1214, and any one of the second heat exchange plates 1222 is disposed in one of the second receiving grooves 1214.

[0085] When the first sidewall 1211 is provided with a first heat exchange plate 1221, the first sidewall 1211 is recessed to form a first receiving groove 1213, so that at least a portion of any one of the first heat exchange plates 1221 can be accommodated in the corresponding first receiving groove 1213, thereby preventing the first heat exchange plate 1221 from protruding relative to the first sidewall 1211; when the second sidewall 1212 is provided with a second heat exchange plate 1222, the second sidewall 1212 is recessed to form a second receiving groove 1214, so that at least a portion of any one of the second heat exchange plates 1222 can be accommodated in the corresponding second receiving groove 1214, thereby preventing the second heat exchange plate 1222 from protruding relative to the second sidewall 1212.

[0086] By forming a first receiving groove 1213 in the first sidewall 1211 and / or forming a second receiving groove 1214 in the second sidewall 1212, the thickness of the heat exchange beam 12 can be reduced, thereby reducing the volume of the heat exchange beam 12 and further improving the space utilization rate when this type of housing assembly 1 is applied to the battery 100.

[0087] According to some embodiments of this application, optionally, please refer to 9. Figure 9 This is a schematic diagram of another heat exchange beam 12 provided in some embodiments of this application. The heat exchange beam 12 includes a beam body 121 and at least one heat exchange plate 122, wherein an installation cavity 1215 is provided in the beam body 121, and the heat exchange plate 122 is disposed in the installation cavity 1215.

[0088] Because the beam 121 has a mounting cavity 1215, the heat exchange plate 122 can be accommodated within the mounting cavity 1215, and the number of heat exchange plates 122 can be one or more. When there are multiple heat exchange plates 122, the number of mounting cavities 1215 can be one, and multiple heat exchange plates 122 can all be disposed within the mounting cavity 1215; or, when there are multiple heat exchange plates 122, the number of mounting cavities 1215 can be multiple, and any one mounting cavity 1215 can contain one or more heat exchange plates 122. In this embodiment, no special limitation is made in this respect.

[0089] By forming an installation cavity 1215 within the beam 121 and placing the heat exchange plate 122 within the installation cavity 1215, not only can the thickness of the heat exchange beam 12 be reduced to improve the space utilization when the box assembly 1 is applied to the battery 100, but the assembly efficiency of the heat exchange beam 12 can also be improved.

[0090] According to some embodiments of this application, optionally, in order to ensure the structural strength of the heat exchange beam 12, the ratio between the total volume of the mounting cavity 1215 and the total volume of the heat exchange beam 12 is less than or equal to 90%. Preferably, the ratio between the total volume of the mounting cavity 1215 and the total volume of the heat exchange beam 12 is less than or equal to 80%.

[0091] According to some embodiments of this application, optionally, please continue to refer to Figure 9 The heat exchange beam 12 also includes a reinforcing rib 1216, and the reinforcing rib 1216 is connected between the heat exchange plate 122 and the inner wall of the mounting cavity 1215.

[0092] The reinforcing rib 1216 can restrict the position of the heat exchange plate 122 within the mounting cavity 1215, and the heat from the beam 121 can be transferred to the heat exchange plate 122 via the reinforcing rib 1216. The material of the reinforcing rib 1216 is the same as that of the beam 121, and the reinforcing rib 1216 and the beam 121 are integrally formed. A portion of the reinforcing ribs 1216 may be connected between the inner side of the first sidewall 1211 and the surface of the heat exchange plate 122 facing the inner side of the first sidewall 1211, and another portion of the reinforcing ribs 1216 may be connected between the inner side of the second sidewall 1212 and the surface of the heat exchange plate 122 facing the inner side of the second sidewall 1212; or, all the reinforcing ribs 1216 may be connected between the inner side of the first sidewall 1211 and the surface of the heat exchange plate 122 facing the inner side of the first sidewall 1211; or, all the reinforcing ribs 1216 may be connected between the inner side of the second sidewall 1212 and the surface of the heat exchange plate 122 facing the inner side of the second sidewall 1212.

[0093] By connecting the heat exchange plate 122 and the inner wall of the mounting cavity 1215 with the reinforcing rib 1216, not only can the structural strength of the heat exchange beam 12 be increased, but it can also play a role in heat conduction to improve the heat exchange performance between the beam 121 and the heat exchange plate 122.

[0094] Optionally, according to some embodiments of this application, a first flow channel for the heat exchange medium to flow is provided in the base plate 111.

[0095] Because the base plate 111 has a first flow channel, the bottom surface of the battery cell 211 facing the base plate 111 can exchange heat with the base plate 111. As a result, after the battery cell 211 is placed in the receiving cavity 13, the base plate 111 and the heat exchange beam 12 can exchange heat with the battery cell 211 respectively, thus improving the heat exchange performance.

[0096] According to some embodiments of this application, optionally, the housing assembly 1 further includes at least one first heat dissipation plate, and the first heat dissipation plate is disposed on the surface of the bottom plate 111 facing or away from the receiving cavity 13.

[0097] The first heat sink plate has a similar or identical structure to the heat exchange plate 122, and there can be one or more first heat sink plates. The first heat sink plate can be disposed on the surface of the base plate 111 facing the receiving cavity 13, so that the battery cell 211 can directly exchange heat with the first heat sink plate; or, the first heat sink plate can be disposed on the surface of the base plate 111 facing away from the receiving cavity 13, so that the heat of the battery cell 211 can be transferred to the first heat sink plate through the base plate 111, thereby realizing the heat exchange between the battery cell 211 and the first heat sink plate. Since the first heat sink plate is disposed outside the receiving cavity 13, it will not occupy the space of the receiving cavity 13.

[0098] By placing the first heat sink on the surface of the base plate 111 facing or away from the receiving cavity 13, the base plate 111 and the first heat exchange plate 1221 can be molded separately and then assembled, reducing the molding difficulty of the base plate 111 and the first heat sink.

[0099] According to some embodiments of this application, optionally, the housing assembly 1 further includes at least one first heat dissipation plate, and at least one first receiving cavity is provided in the bottom plate 111, with the first heat dissipation plate disposed in the first receiving cavity.

[0100] The first heat sink plate has a similar or identical structure to the heat exchange plate 122, and the number of first heat sink plates can be one or more. When there are multiple first heat sink plates, the number of first receiving cavities can be one, and multiple first heat sink plates can be disposed in the first receiving cavity; or, when there are multiple first heat sink plates, the number of first receiving cavities can be multiple, and one or more first heat sink plates can be disposed in any one of the first receiving cavities.

[0101] By forming a first accommodating cavity in the base plate 111 and placing the first heat sink in the first accommodating cavity, not only can the thickness of the base plate 111 be reduced to improve the space utilization when the housing assembly 1 is applied to the battery 100, but the assembly efficiency of the base plate 111 and the first heat sink can also be improved.

[0102] According to some embodiments of this application, optionally, please continue to refer to Figure 2 The frame 11 also includes a cover plate 113, which is disposed at the end of the side plate 112 away from the bottom plate 111 to seal the receiving cavity 13.

[0103] The cover plate 113 is used to seal the receiving cavity 13. The shape of the cover plate 113 is adapted to the shape of the receiving cavity 13, such as circular, hexagonal, square, etc. By covering the side plate 112 with the cover plate 113, the housing assembly 1 can be formed into a closed housing structure, which helps to protect the battery cell 211 after it is placed in the receiving cavity 13.

[0104] Optionally, according to some embodiments of this application, a second flow channel for the heat exchange medium to flow is provided inside the cover plate 113.

[0105] Because the cover plate 113 has a first flow channel, the top surface of the battery cell 211 facing the cover can exchange heat with the cover plate 113. This allows the battery cell 211 to exchange heat with the cover plate 113 after it is placed in the receiving cavity 13, thus improving the heat exchange performance.

[0106] According to some embodiments of this application, optionally, the housing assembly 1 further includes at least one second heat dissipation plate, and the second heat dissipation plate is disposed on the surface of the cover plate 113 facing or away from the receiving cavity 13.

[0107] The second heat sink has a similar or identical structure to the heat exchange plate 122, and there can be one or more second heat sinks. The second heat sink can be disposed on the surface of the cover plate 113 facing the receiving cavity 13, so that the battery cell 211 can directly exchange heat with the second heat sink; or, the second heat sink can be disposed on the surface of the cover plate 113 facing away from the receiving cavity 13, so that the heat of the battery cell 211 can be transferred to the second heat sink through the cover plate 113, thereby realizing heat exchange between the battery cell 211 and the second heat sink. Since the second heat sink is disposed outside the receiving cavity 13, it will not occupy the space of the receiving cavity 13.

[0108] By placing the second heat sink on the surface of the cover plate 113 facing or away from the receiving cavity 13, the cover plate 113 and the second heat sink can be molded separately and then assembled, reducing the molding difficulty of the cover plate 113 and the second heat sink.

[0109] According to some embodiments of this application, optionally, the housing assembly 1 further includes at least one second heat dissipation plate, and the cover plate 113 is provided with at least one second receiving cavity, the second heat dissipation plate being disposed in the second receiving cavity.

[0110] The second heat sink has a similar or identical structure to the heat exchange plate 122, and there can be one or more second heat sinks. When there are multiple second heat sinks, there can be one second receiving cavity, and multiple second heat sinks can be disposed in the second receiving cavity; or, when there are multiple second heat sinks, there can be multiple second receiving cavities, and one or more second heat sinks can be disposed in any one second receiving cavity.

[0111] By forming a second accommodating cavity within the cover plate 113 and placing the second heat sink within the second accommodating cavity, not only can the thickness of the cover plate 113 be reduced to improve the space utilization when the housing assembly 1 is applied to the battery 100, but the assembly efficiency of the cover plate 113 and the second heat sink can also be improved.

[0112] According to some embodiments of this application, please refer to Figure 2 and Figure 3 This application provides a housing assembly 1, including a frame 11 and multiple heat exchange beams 12. The frame 11 includes a base plate 111 and side plates 112 arranged around the base plate 111. The base plate 111 and the side plates 112 together form a receiving cavity 13. The heat exchange beams 12 are disposed within the receiving cavity 13 to divide the receiving cavity 13 into multiple receiving sub-cavities 131. The heat exchange beams 12 are provided with heat exchange channels for the flow of heat exchange medium. Multiple heat exchange plates 122 are spaced apart along the Y-axis, and any one of the heat exchange plates 122 extends along the X-axis. The heat exchange beams not only improve the overall rigidity of the frame 11, but also integrate heat exchange functions because the heat exchange beams 12 are provided with heat exchange channels for the flow of heat exchange medium. This improves the space utilization rate when this housing assembly 1 is applied to a battery 100, thereby increasing the energy density of the battery 100.

[0113] According to some embodiments of this application, this application also provides a battery 100, including the housing assembly 1 described in any of the above embodiments.

[0114] According to some embodiments of this application, please refer to Figure 2 The battery 100 includes a battery cell 211 and a housing assembly 1, wherein a receiving cavity 131 is used to house the battery cell 211.

[0115] The number of battery cells 211 placed in any one of the receiving cavities 131 can be one or more. Multiple battery cells 211 can be electrically connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cells 211 are connected in both series and parallel. The battery cell 211 can be a primary battery 100 or a secondary battery 100; it can also be a lithium-sulfur battery 100, a sodium-ion battery 100, or a magnesium-ion battery 100, but is not limited to these. The battery cell 211 can be cylindrical, flat, cuboid, or any other arbitrary shape, i.e., the battery cell 211 can be a cylindrical battery cell, a square battery cell, or a pouch battery cell, etc.

[0116] The housing assembly 1 provides a cavity 13 for accommodating multiple battery cells 211. During charging and discharging, each battery cell 211 generates heat. Excessive or insufficient temperature of the battery cell 211 can negatively impact the performance and lifespan of the battery 100. The heat exchange beam 12 also exchanges heat with the battery cells 211 to ensure the safe operation of each battery cell 211.

[0117] After the battery cell 211 is placed in the receiving cavity 13, the battery cell 211 can exchange heat with the heat exchange beam 12 to achieve heat dissipation or heating treatment of the battery cell 211. The heat exchange beam 12 can not only improve the overall rigidity of the frame 11, but also integrate heat exchange function because the heat exchange beam 12 is provided with heat exchange channels for the flow of heat exchange medium, thereby improving the space utilization of the housing assembly 1 and thus improving the energy density of the battery 100.

[0118] According to some embodiments of this application, optionally, please continue to refer to Figure 2 The heat exchange beam 12 is configured as a heat exchange crossbeam and / or a heat exchange longitudinal beam, and the dimension of the battery cell 211 along the height direction of the heat exchange beam 12 is smaller than the dimension of the battery cell 211 along the extension direction of the heat exchange beam 12 and the dimension of the battery cell 211 along the thickness direction of the heat exchange beam 12.

[0119] All heat exchange beams 12 can be configured as heat exchange crossbeams, that is, the heat exchange beams 12 extend along the length direction of the box assembly 1; or, all heat exchange beams 12 can be configured as heat exchange longitudinal beams, that is, the heat exchange beams 12 extend along the width direction of the box assembly 1; or, some heat exchange beams 12 are configured as heat exchange crossbeams and other heat exchange beams 12 are configured as heat exchange longitudinal beams, so that the heat exchange beams 12 are distributed in a grid pattern.

[0120] Because the dimension of the battery cell 211 along the height direction of the heat exchange beam 12 is smaller than the dimension of the battery cell 211 along the extension direction of the heat exchange beam 12 and the dimension of the battery cell 211 along the thickness direction of the heat exchange beam 12, the battery cell 211 is placed in a flat position in the receiving cavity 13.

[0121] If the battery cells 211 are placed vertically, the electrolyte content within each cell will vary along the vertical direction, resulting in a significant temperature difference in the vertical direction. Furthermore, there is also a temperature difference between the middle and sides of the battery pack 2. To ensure sufficient heat exchange between the heat exchange beam 12 and the battery pack 2, the design of the heat exchange beam 12 will be complex and less flexible.

[0122] If the battery cell 211 is placed flat, the electrolyte content within the battery cell 211 is evenly distributed in the vertical direction, resulting in a uniform temperature of the battery cell 211 in the vertical direction. This reduces the design requirements of the heat exchange beam 12, increases the design flexibility of the heat exchange beam 12, and can also extend the service life of the housing assembly 1 and the battery 100. The side surface of the battery cell 211 (the surface other than the large surface) faces the heat exchange beam 12. Compared to the large surface of the battery cell 211, the side surface of the battery cell 211 has a lower degree of expansion, so it will not compress the heat exchange beam 12 and cause damage to the heat exchange beam 12 after a certain deformation.

[0123] By placing the battery cell 211 flat, the internal temperature of the battery cell 211 is more uniform, which reduces the design requirements of the heat exchange beam 12 in the height direction.

[0124] Optionally, according to some embodiments of this application, please refer to Figures 10 to 12 , Figure 10 for Figure 2 The diagram shows the assembly relationship between the battery bank 2 and the heat exchange beam 12 in the battery 100. Figure 11 for Figure 2 The diagram shown illustrates another assembly relationship between the battery bank 2 and the heat exchange beam 12 in the battery 100. Figure 12 This is a schematic diagram of the structure of a battery cell 211 provided in some embodiments of this application. The battery cell 211 is provided with a pressure relief mechanism 213, and the pressure relief mechanism 213 faces the heat exchange beam 12.

[0125] The pressure relief mechanism 213 includes, but is not limited to, explosion-proof valves or other components. As long as the pressure relief mechanism 213 can discharge high-temperature emissions to release the internal pressure of the battery cell 211 when thermal runaway occurs, there are no special limitations in this embodiment.

[0126] When a battery cell 211 experiences thermal runaway, the high-temperature emissions can rupture the pressure relief mechanism 213, allowing the high-temperature emissions to escape and preventing the battery cell 211 from exploding. In this embodiment, the pressure relief mechanism 213 is disposed on one surface of the battery cell 211 facing the heat exchange beam 12, so that once the pressure relief mechanism 213 is activated, the heat exchange beam 12 can exchange heat with the high-temperature emissions, preventing prolonged heat accumulation at the venting point and avoiding safety hazards.

[0127] According to some embodiments of this application, optionally, each battery cell 211 is disposed adjacent to at least one heat exchange beam 12, and the pressure relief mechanism 213 is oriented toward at least one of the adjacent heat exchange beams 12.

[0128] When multiple battery cells 211 are placed in the receiving cavity 131, each battery cell has at least one surface that is close to and faces the heat exchange beam 12. At least one surface that is close to and faces the heat exchange beam 12 is provided with a pressure relief mechanism 213. That is, one or more pressure relief mechanisms 213 can be provided on the battery cell 211, which helps to reduce the distance between the pressure relief mechanism 213 and the heat exchange beam 12 and improve the heat exchange effect.

[0129] According to some embodiments of this application, optionally, please continue to refer to Figure 11 and Figure 12 The battery cell 211 is also provided with electrode terminals 212, and the electrode terminals 212 and the pressure relief mechanism 213 are respectively provided on two adjacent or opposite surfaces of the battery cell 211.

[0130] Electrode terminals 212 are used to contact the electrolyte inside the battery cell 211 to input or output electrical energy. Each battery cell 211 has two electrode terminals 212, designated as a positive terminal and a negative terminal. The material of the electrode terminals 212 includes, but is not limited to, any one or any alloy of iron, copper, aluminum, gold, silver, or any other conductive metal; no special limitations are imposed in this embodiment.

[0131] The pressure relief mechanism 213 is disposed on one surface of the battery cell 211 facing the heat exchange beam 12, and the electrode terminal 212 is disposed on the surface adjacent to or opposite to this surface. When the pressure relief mechanism 213 ejects, since the electrode terminal 212 and the pressure relief mechanism 213 are on different surfaces of the battery cell 211, the adverse effects of the ejection of the pressure relief mechanism 213 on the electrical connection area, such as short circuits and high-voltage arcing, can be reduced. Furthermore, since the pressure relief mechanism 213 is disposed facing the heat exchange beam 12, that is, the electrode terminal 212 is not disposed facing the heat exchange beam 12, when the heat exchange beam 12 is damaged and the heat exchange medium leaks, the risk of short circuits caused by the heat exchange medium is reduced.

[0132] According to some embodiments of this application, optionally, please continue to refer to Figure 2 The battery 100 includes a battery row 2 consisting of a plurality of battery cells 211 arranged along a first direction, and a heat exchange beam 12 extending along the first direction.

[0133] Multiple battery cells 211 can be arranged along a first direction (X-axis direction) to form a battery pack 2, and one or more battery packs 2 can be placed in a receiving cavity 131. The heat exchange beam 12 extends along the first direction, that is, the length direction of the heat exchange beam 12 is parallel to the length direction of the battery pack 2, so that each battery cell 211 in the battery pack 12 can exchange heat with the heat exchange beam 12, improving the heat exchange effect. In this embodiment, the number of battery cells 211 arranged along the first direction (X-axis direction) in a battery pack 2 can be ten.

[0134] By extending the heat exchange beam 12 along the length of the battery pack 2, the distribution of the heat exchange beam 12 within the housing cavity 13 is simplified, thereby simplifying the structure of the housing assembly 1.

[0135] According to some embodiments of this application, optionally, please continue to refer to Figure 11 The heat exchange beam 12 is provided with a discharge chamber (not shown in the figure), which is used to receive the emissions from the self-depressurization mechanism 213 of the battery cell 211.

[0136] Since the heat exchange beam 12 is equipped with a discharge chamber, when the pressure relief mechanism 213 is activated, the high-temperature emissions can enter the discharge chamber. This further enables the heat exchange beam 12 to integrate the function of collecting emissions from the battery cells 211, making the internal structure of the battery 100 more compact.

[0137] According to some embodiments of this application, optionally, please continue to refer to Figure 11 The heat exchange beam 12 is provided with at least one docking part 123, and the discharge chamber is adapted to receive the emissions emitted by the self-depressurization mechanism 213 of the battery cell 211 through the docking part 123.

[0138] The docking part 123 can be a through-hole structure or a weak part structure, both of which can be used to receive the discharged material into the discharge chamber when the pressure relief mechanism 213 is ejected, thereby improving safety. In the embodiments of this application, the docking part 123 can be a through-hole structure, and the shape of the through-hole structure can be circular, square, rhomboid, elliptical, etc.

[0139] According to some embodiments of this application, optionally, there are multiple docking portions 123, and the multiple docking portions 123 are spaced apart on the heat exchange beam 12 along a first direction, wherein any one docking portion 123 is configured to correspond to the pressure relief mechanism 213 of at least one battery cell 211.

[0140] The docking part 123 can be a through hole structure connecting to the discharge chamber or a weak part structure. After the discharge material or the air pressure in the box breaks through, it can enter the discharge chamber through this part. The corresponding arrangement can be such that the two are relatively close, or the docking part 123 and the pressure relief mechanism 213 are arranged opposite each other in a certain direction, so that the discharge material discharged from the pressure relief mechanism 213 can enter the discharge chamber more quickly through the docking part 123.

[0141] The number of docking portions 123 arranged along the first direction (X-axis direction) can be greater than or equal to the number of battery cells 211 in the battery pack 2, so that each battery cell 211 corresponds to one docking portion 123. In this embodiment, the number of docking portions 123 arranged along the first direction (X-axis direction) is equal to the number of battery cells 211 in the battery pack 2, and the two pressure relief mechanisms 213 provided on two opposite battery cells 211 in the two battery packs 2 located on both sides of the heat exchange beam 12 correspond to the same docking portion 123.

[0142] By aligning the pressure relief mechanism 213 with the docking part 123 on the heat exchange beam 12, the high-temperature emissions can enter the discharge chamber from the docking part 123 when the pressure relief mechanism 213 is ejected, thus avoiding direct impact of the high-temperature emissions on the heat exchange beam 12 and improving the pressure relief effect.

[0143] According to some embodiments of this application, optionally, in order to ensure the structural strength of the heat exchange beam 12, the connecting portion 123 can be a through-hole structure. The area of ​​the through-hole structure needs to be equal to or greater than the area of ​​the pressure relief mechanism 213, and the ratio between the total area of ​​the multiple through-hole structures and the surface area of ​​the heat exchange beam 12 is less than or equal to 30%. Preferably, the ratio between the total area of ​​the multiple through-hole structures and the surface area of ​​the heat exchange beam 12 can be 25%.

[0144] In some embodiments of this application, optionally, in order to ensure the exhaust effect of the heat exchange beam 12, the distance between the pressure relief mechanism 213 and the heat exchange beam 12 is equal to or equal to 0.1 mm and equal to or less than 20 mm. Preferably, the distance between the pressure relief mechanism 213 and the heat exchange beam 12 is equal to or equal to 0.5 mm and equal to or less than 15 mm.

[0145] According to some embodiments of this application, in order to ensure the heat exchange effect of the heat exchange beam 12, the ratio between the total volume of the mounting cavity 1215 and the charge of the battery 100 is greater than or equal to 0.0004. Preferably, the ratio between the total volume of the mounting cavity 1215 and the charge of the battery 100 can be 0.001.

[0146] According to some embodiments of this application, optionally, please continue to refer to Figure 2 The battery row 2 has multiple rows, and at least two of the multiple rows of battery row 2 are stacked along the height direction of the heat exchange beam 12.

[0147] At least two battery rows 2 are stacked along the height direction of the heat exchange beam 12 to form a battery cell assembly, and at least two battery cells 211 stacked along the height direction (Z-axis direction) of the heat exchange beam 12 to form a battery pack 21. In this embodiment, a battery cell assembly includes two battery rows 2 stacked along the height direction of the heat exchange beam 12, that is, a battery pack 21 includes two battery cells 211.

[0148] This allows multiple rows of battery packs 2 arranged along the height and thickness of the heat exchange beam 12 to be placed in any one of the receiving sub-cavities 131, improving the space utilization rate when the housing assembly 1 is used in the battery 100.

[0149] According to some embodiments of this application, optionally, please continue to refer to Figure 11 The heat exchange beam 12 is provided with a plurality of docking parts 123 at intervals along its height direction, wherein any one docking part 123 is configured to correspond to the pressure relief mechanism 213 of at least one battery cell 211.

[0150] The docking part 123 can be a through hole structure connecting to the discharge chamber or a weak part structure. After the discharge material or the air pressure in the box breaks through, it can enter the discharge chamber through this part. The corresponding arrangement can be such that the two are relatively close, or the docking part 123 and the pressure relief mechanism 213 are arranged opposite each other in a certain direction, so that the discharge material discharged from the pressure relief mechanism 213 can enter the discharge chamber more quickly through the docking part 123.

[0151] The number of mating portions 123 arranged along the height direction (Z-axis direction) of the heat exchange beam 12 can be greater than or equal to the number of battery packs 2 in a single battery cell assembly, so that each battery cell 211 corresponds to one mating portion 123. In the embodiment of this application, the number of mating portions 123 arranged along the height direction (Z-axis direction) of the heat exchange beam 12 is equal to the number of battery packs 2 in a single battery cell assembly.

[0152] By arranging multiple docking sections 123 along the height of the heat exchange beam 12, the high-temperature emissions can flow through the docking sections 123 into the discharge chamber when the pressure relief mechanism 213 is activated, thus avoiding direct impact of the high-temperature emissions on the heat exchange beam 12 and improving the pressure relief effect.

[0153] According to some embodiments of this application, optionally, the battery pack 2 has multiple rows, at least two of the multiple rows of battery pack 2 are arranged side by side along a second direction and are perpendicular to the first direction in the second direction; in the second direction, a heat exchange beam 12 is provided between at least partially adjacent two battery packs 2.

[0154] At least two battery packs 2 are arranged along the second direction (Y-axis direction). In the second direction (Y-axis direction), a heat exchange beam 12 can be provided between any two adjacent battery packs 2 to improve the heat exchange effect. For example, the number of battery packs 12 arranged along the second direction (Y-axis direction) can be four, and the number of heat exchange beams 12 can be three. These three heat exchange beams 12 can divide the receiving cavity 13 into four independent receiving sub-cavities 131. One battery pack 2 can be placed in one receiving sub-cavity 131, that is, a heat exchange beam 12 is provided between any two adjacent battery packs 2.

[0155] Alternatively, heat exchange beams may be provided between some adjacent battery packs 2, while no heat exchange beams may be provided between other adjacent battery packs. For example, there may be eight battery packs 12 arranged along the second direction (Y-axis direction) and three heat exchange beams 12. These three heat exchange beams 12 can divide the receiving cavity 13 into four independent receiving sub-cavities 131. Two battery packs 2 arranged along the second direction (Y-axis direction) can be placed in one receiving sub-cavity 131, that is, only some adjacent battery packs 2 are provided with heat exchange beams 12.

[0156] In the second direction (Y-axis direction), the heat exchange effect can be improved by setting heat exchange beams 12 between any two adjacent battery packs 2; by setting heat exchange beams 12 between some adjacent battery packs 2, the number of heat exchange beams 12 can be reduced while ensuring the heat exchange effect, thereby improving the space utilization rate when the housing assembly 1 is applied to the battery 100.

[0157] Optionally, according to some embodiments of this application, please refer to Figure 13 , Figure 13 for Figure 13 This is a partial structural diagram of another battery 100 provided in some embodiments of this application. The battery cell 211 is a cylindrical battery cell, and the axial direction of the battery cell 211 is parallel to the height direction of the heat exchange beam 12; a plurality of first limiting grooves 1217 are formed in the recess of the first sidewall 1211, and a plurality of second limiting grooves 1218 are formed in the recess of the second sidewall 1212. Any one of the first limiting grooves 1217 abuts against the outer peripheral surface of a battery cell 211, and any one of the second limiting grooves 1218 abuts against the outer peripheral surface of a battery cell 211.

[0158] The outer shell of the battery cell 211 can be cylindrical, and the battery cell 211 is placed vertically, that is, the axial direction of the battery cell 211 is parallel to the height direction of the heat exchange beam 12. A battery pack includes at least two battery cells 211 arranged along a first direction (X-axis direction), and at least two rows of battery packs 2 arranged along a second direction (Y-axis direction) are placed in any one of the receiving sub-cavities 131.

[0159] In this embodiment, a battery pack 2 includes fifteen battery cells arranged along a first direction (X-axis direction), and two rows of battery packs 2 arranged along a second direction (Y-axis direction) are placed in any receiving cavity 131. A first limiting groove 1217 is formed in the indentation of the first sidewall 1211, and a second limiting groove 1218 is formed in the indentation of the second sidewall 1212, so that the outer peripheral surface of the battery cell 211 can abut against the first limiting groove 1217 and the second limiting groove 1218 respectively. The number of the first limiting groove 1217 and the second limiting groove 1218 is the same as the number of battery cells 211 in a battery pack 2.

[0160] It is understandable that the beam body 121 may only have a first limiting groove 1217 or a second limiting groove 1218.

[0161] By placing the battery cells 211 vertically, it is beneficial to arrange the battery pack 2 quickly. By setting the first limiting groove 1217 on the first side wall 1211 and / or setting the second limiting groove 1218 on the second side wall 1212, not only can the battery cells 211 be limited, but the heat transfer area between the battery cells 211 and the heat exchange beam 12 can also be increased to improve the heat exchange performance.

[0162] According to some embodiments of this application, optionally, in order to improve the integration efficiency of the heat exchange beams 12, the ratio between the total volume of the plurality of heat exchange beams 12 and the total volume of the housing assembly 1 is less than or equal to 15%, and the ratio between the total mass of the plurality of heat exchange beams 12 and the total mass of the housing assembly 1 is less than or equal to 10%. Preferably, the ratio between the total volume of the plurality of heat exchange beams 12 and the total volume of the housing assembly 1 can be 10%, and the ratio between the total mass of the plurality of heat exchange beams 12 and the total mass of the housing assembly 1 can be equal to 5%.

[0163] In some embodiments of this application, optionally, in order to improve the structural strength of the heat exchange beam 12, the gap between the heat exchange beam 12 and the battery cell 211 is less than or equal to 3 mm, so as to avoid direct contact between the battery cell 211 and the heat exchange beam 12, which would cause deformation of the heat exchange beam 12. Preferably, the gap between the heat exchange beam 12 and the battery cell 211 can be less than or equal to 1.5 mm.

[0164] It should be noted that the gap between the battery cell 211 and the heat exchange beam 12 can be filled with thermally conductive adhesive, which can not only fix the battery cell 211, but also transfer the heat generated by the battery cell 211 to the heat exchange beam 12, thereby improving the heat exchange effect of the housing assembly 1.

[0165] Optionally, in order to ensure the integration efficiency of the housing assembly 1, when the heat exchange beam 12 extends along the length direction of the housing assembly 1, the ratio between the length of the heat exchange beam 12 and the length of the housing assembly 1 is greater than or equal to 0.5 and less than or equal to 1; when the heat exchange beam 12 extends along the width direction of the housing assembly 1, the ratio between the length of the heat exchange beam 12 and the width of the housing assembly 1 is greater than or equal to 0.5 and less than or equal to 1. Preferably, when the heat exchange beam 12 extends along the length direction of the housing assembly 1, the ratio between the length of the heat exchange beam 12 and the length of the housing assembly 1 can be 0.5; when the heat exchange beam 12 extends along the width direction of the housing assembly 1, the ratio between the length of the heat exchange beam 12 and the width of the housing assembly 1 can be 0.5.

[0166] According to some embodiments of this application, please refer to Figure 2 and Figure 3 This application provides a battery 100, including a plurality of battery cells 211 and a housing assembly 1. The housing assembly 1 includes a frame 11 and a plurality of heat exchange beams 12. The frame 11 includes a base plate 111 and side plates 112 arranged around the base plate 111. The base plate 111 and the side plates 112 together form a receiving cavity 13. The heat exchange beams 12 are disposed in the receiving cavity 13 to divide the receiving cavity 13 into a plurality of receiving sub-cavities 131. The heat exchange beams 12 are provided with heat exchange channels for the flow of heat exchange medium. A plurality of heat exchange plates 122 are spaced apart along the Y-axis direction, and any one of the heat exchange plates 122 extends along the X-axis direction. At least two of the plurality of battery cells 211 are arranged along the X-axis direction to form a battery row. At least two battery rows are placed in a receiving sub-cavity 131, and the at least two battery rows are stacked along the height direction of the heat exchange beams 12. The heat exchange beam not only improves the overall rigidity of the frame 11, but also integrates heat exchange functionality due to the heat exchange channels within the heat exchange beam 12 for the flow of the heat exchange medium. This improves the space utilization of the housing assembly 1, thereby increasing the energy density of the battery 100. Furthermore, by placing the battery cells 211 in a flat position, the internal temperature of the battery cells 211 is more uniform, reducing the design requirements for the heat exchange beam 12 in the height direction.

[0167] According to some embodiments of this application, this application also provides an electrical device including the battery 100 described in any of the above embodiments, and the battery 100 is used to provide electrical energy to the electrical device.

[0168] The electrical device can be any of the aforementioned devices or systems that use battery 100.

[0169] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A housing assembly, characterized in that, include: A frame, the frame including a base plate and side plates arranged around the base plate, the base plate and the side plates together forming a receiving cavity; At least one heat exchange beam is disposed within the receiving cavity to divide the receiving cavity into multiple receiving sub-cavities, and the heat exchange beam is provided with a heat exchange channel for the flow of heat exchange medium. The heat exchange beam includes: A beam having opposing first and second sidewalls along its thickness direction; At least one first heat exchange plate, wherein the first heat exchange plate is disposed on the first sidewall; And / or, at least one second heat exchange plate disposed on the second sidewall.

2. The housing assembly according to claim 1, characterized in that, The first sidewall is recessed to form at least one first receiving groove, and any one of the first heat exchange plates is disposed in one of the first receiving grooves; And / or, the second sidewall is recessed to form at least one second receiving groove, and any one of the second heat exchange plates is disposed in one of the second receiving grooves.

3. The housing assembly according to any one of claims 1-2, characterized in that, The base plate is provided with a first flow channel for the heat exchange medium to flow.

4. The housing assembly according to any one of claims 1-2, characterized in that, The housing assembly further includes at least one first heat dissipation plate, and the first heat dissipation plate is disposed on the surface of the base plate facing or away from the receiving cavity.

5. The housing assembly according to any one of claims 1-2, characterized in that, The housing assembly further includes at least one first heat dissipation plate, and the bottom plate is provided with at least one first receiving cavity, wherein the first heat dissipation plate is disposed in the first receiving cavity.

6. The housing assembly according to any one of claims 1-2, characterized in that, The frame also includes a cover plate disposed at the end of the side plate away from the bottom plate to seal the receiving cavity.

7. The housing assembly according to claim 6, characterized in that, The cover plate is provided with a second flow channel for the heat exchange medium to flow.

8. The housing assembly according to claim 6, characterized in that, The housing assembly further includes at least one second heat dissipation plate, and the second heat dissipation plate is disposed on the surface of the cover plate facing or away from the receiving cavity.

9. The housing assembly according to claim 6, characterized in that, The housing assembly further includes at least one second heat dissipation plate, and the cover plate is provided with at least one second receiving cavity, wherein the second heat dissipation plate is disposed in the second receiving cavity.

10. A battery, characterized in that, It includes a battery cell and a housing assembly as described in any one of claims 1-9, wherein the receiving cavity is used to house the battery cell.

11. The battery according to claim 10, characterized in that, The heat exchange beam is configured as a heat exchange crossbeam and / or a heat exchange longitudinal beam, and the dimension of the battery cell along the height direction of the heat exchange beam is smaller than the dimension of the battery cell along the extension direction of the heat exchange beam and the dimension of the battery cell along the thickness direction of the heat exchange beam.

12. The battery according to claim 10, characterized in that, The battery cell is equipped with a pressure relief mechanism, and the pressure relief mechanism faces the heat exchange beam.

13. The battery according to claim 12, characterized in that, Each of the battery cells is disposed adjacent to at least one of the heat exchange beams, and the pressure relief mechanism is oriented toward at least one of the adjacent heat exchange beams.

14. The battery according to claim 12 or 13, characterized in that, The battery cell is also provided with electrode terminals, and the electrode terminals and the pressure relief mechanism are respectively provided on two adjacent or opposite surfaces of the battery cell.

15. The battery according to claim 12, characterized in that, The battery includes a battery pack formed by arranging a plurality of battery cells along a first direction, and the heat exchange beam extends along the first direction.

16. The battery according to claim 15, characterized in that, The heat exchange beam is provided with a discharge chamber, which is adapted to receive the emissions from the battery cells from the pressure relief mechanism.

17. The battery according to claim 16, characterized in that, The heat exchange beam is provided with at least one docking part, and the discharge chamber is adapted to receive the emissions from the battery cell from the pressure relief mechanism through the docking part.

18. The battery according to claim 17, characterized in that, There are multiple docking portions, and the multiple docking portions are spaced apart along the first direction, wherein any one of the docking portions is configured to correspond to the pressure relief mechanism of at least one of the battery cells.

19. The battery according to claim 15, characterized in that, The battery pack has multiple rows, and at least two of the multiple rows of battery packs are stacked along the height direction of the heat exchange beam.

20. The battery according to claim 19, characterized in that, The heat exchange beam is provided with a plurality of docking parts at intervals along its height direction, wherein any one of the docking parts is configured to correspond to the pressure relief mechanism of at least one of the battery cells.

21. The battery according to any one of claims 15-20, characterized in that, The battery pack has multiple rows, and at least two of the multiple rows of battery packs are arranged side by side along a second direction, and the second direction is perpendicular to the first direction; in the second direction, the heat exchange beam is arranged between at least partially adjacent two battery packs.

22. The battery according to claim 15, characterized in that, The battery cell is a cylindrical battery cell, and the axial direction of the battery cell is parallel to the height direction of the heat exchange beam. The first sidewall is recessed to form a plurality of first limiting grooves, and the second sidewall is recessed to form a plurality of second limiting grooves. Any one of the first limiting grooves abuts against the outer peripheral surface of one of the battery cells, and any one of the second limiting grooves abuts against the outer peripheral surface of one of the battery cells.

23. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 10-22, the battery being used to provide electrical energy.

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