Battery device and electric device

Abstract

This application provides a battery device and an electrical device. The battery device includes a battery case, a heat exchange assembly, a balance valve, battery cells, and a filler. The heat exchange assembly is disposed within the housing space of the battery case and divides the housing space into a housing cavity and an installation space, the installation space being formed between the heat exchange assembly and a bottom wall. The heat exchange assembly has at least two injection ports extending through its thickness direction. Along a second direction, the battery cells, the heat exchange assembly, and the bottom wall are sequentially arranged. The filler is disposed in the installation space and injected into the installation space through the injection ports; the filler material includes a foaming material. The balance valve is configured to open when the air pressure within the housing space exceeds a threshold, thereby connecting the housing space to the external environment of the battery device. Multiple vents are formed between the heat exchange assembly and the battery case to connect the housing cavity and the installation space. On the same projection plane perpendicular to the second direction, the orthographic projections of the multiple vents are located at the corners of the orthographic projection of the heat exchange assembly.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0002] With the promotion and popularization of the concept of green development, new energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, battery devices are being used more and more in the field of energy storage.

[0003] In battery-powered electrical devices, the battery can provide all or part of the power. In related technologies, increasing the structural strength of the battery device often leads to a complex structure. Therefore, how to improve the structural strength of the battery device while facilitating the placement of the filler components has become an important research direction in this field. Utility Model Content

[0004] In view of this, this application aims to provide a battery device and an electrical device that can improve the structural strength of the battery device while facilitating the placement of filler components.

[0005] To achieve the above objectives, embodiments of this application provide a battery device, the battery device comprising:

[0006] A battery box, the battery box including a bottom wall and side walls surrounding the periphery of the bottom wall, the bottom wall and the side walls together forming an accommodating space;

[0007] A heat exchange assembly is disposed within the receiving space, the heat exchange assembly divides the receiving space into a receiving cavity and an installation space, the installation space is formed between the heat exchange assembly and the bottom wall, the heat exchange assembly is provided with at least two injection ports extending through the thickness direction of the heat exchange assembly, the at least two injection ports communicate with the installation space, and the at least two injection ports are spaced apart along a first direction;

[0008] At least one battery cell is disposed within the receiving cavity; the heat exchange assembly is used to contain the heat exchange medium and is thermally connected to the at least one battery cell; along the second direction, the battery cell, the heat exchange assembly, and the bottom wall are arranged sequentially, and the first direction is perpendicular to the second direction;

[0009] A filler is disposed within the mounting space, and the filler is injected into the mounting space through the at least two injection ports. The material of the filler includes a foaming material.

[0010] A balance valve is disposed in the battery compartment and is configured to open when the air pressure in the containment space is greater than a threshold, so as to connect the containment space and the external environment of the battery device;

[0011] Multiple vents are formed between the heat exchange component and the battery box to connect the receiving cavity and the installation space. On the same projection plane perpendicular to the second direction, the orthographic projection of the multiple vents is located at the corner of the orthographic projection of the heat exchange component.

[0012] The battery device provided in this application improves the heat exchange efficiency of the heat exchange component by placing it within the accommodating space, thereby enhancing the performance and reliability of the battery device. By defining an installation space between the heat exchange component and the bottom wall, and placing the filler within this space, the structural strength and impact resistance of the battery device are improved. An injection port on the heat exchange component allows foaming material to be injected into the installation space, ensuring uniform distribution between the heat exchange component and the bottom wall. Furthermore, the gas generated by the foaming material can be discharged through a balance valve, reducing the increased settling time during manufacturing due to gas production and thus improving production cycle time. Compared to placing the filler between the outside of the battery box and the bottom cover, this avoids bulging issues on the bottom cover caused by internal and external pressure differences due to gas production, and eliminates the need for sealing between the battery box and the bottom cover, thereby improving assembly efficiency and production cycle time. Furthermore, by providing at least two injection ports, liquid can be injected simultaneously through multiple ports. This improves production efficiency while ensuring the foaming material is fully foamed, evenly distributed, and completely filled within the installation space. It also facilitates the placement of fillers and addresses the issue of insufficient strength in localized areas of the bottom wall due to inadequate foaming material filling. By spacing all injection ports along the first direction, the flow and filling of the foaming material are facilitated, mitigating clogging issues. In other words, this increases production cycle time while also improving the uniformity of filler filling and addressing insufficient filling and clogging. The battery device of this application embodiment can improve the structural strength of the battery device while facilitating the placement of fillers.

[0013] Furthermore, on the same projection plane perpendicular to the second direction, by placing the orthographic projection of multiple vents at the corner of the orthographic projection of the heat exchange component, it is beneficial to the overflow and venting of the foaming material, so that the foaming material can be fully foamed, evenly distributed, and fully filled in the installation space. While facilitating the setting of the filler, it can also improve the problem of insufficient strength in local areas of the bottom wall due to insufficient filling of foaming material, and further improve the structural strength and impact resistance of the battery device by the filler.

[0014] In one embodiment, the dimension of the heat exchange component in the first direction is larger than the dimension of the heat exchange component in the third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0015] Injection ports are spaced apart along the direction of the larger size of the heat exchange component. When the spacing between adjacent injection ports is the same, after the filler is injected into the installation space through the injection port, the distance to be filled to both sides along the third direction is relatively short, which helps to further improve the production cycle.

[0016] In one embodiment, the number of battery cells is multiple, and the multiple battery cells are arranged along the first direction to form a battery cell assembly. The multiple battery cell assemblies are spaced apart along the third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0017] By rationally arranging the individual battery cells, the structural strength of the battery device can be improved while facilitating the placement of filler components.

[0018] In one embodiment, the distance between two adjacent injection ports is 300mm-450mm.

[0019] Thus, by setting the distance between two adjacent injection ports to 300mm-450mm, the production cycle can be increased while minimizing the impact on the design and structural strength of the heat exchange components.

[0020] In one embodiment, the heat exchange assembly has a third-direction axis of symmetry passing through the center of the injection port, and the first direction, the second direction, and the third-direction are perpendicular to each other.

[0021] In this way, after the filler is injected into the installation space through the injection port, the time required to fill to the edges of the heat exchange component on both sides in the third direction is the same, which helps to improve the filling uniformity of the filler and increase the production cycle.

[0022] In one embodiment, the at least two injection ports are arranged symmetrically about the axis of symmetry of the heat exchange assembly in a first direction.

[0023] In this way, after the filler is injected into the installation space through the injection port, the time required to fill to the edges of the heat exchange component on both sides in the first direction is the same, which helps to improve the filling uniformity of the filler and increase the production cycle.

[0024] In one embodiment, the injection port is provided with the exhaust port on both sides of the first direction.

[0025] This will help to further improve the uniformity of filling and increase production cycle time.

[0026] In one embodiment, the orthographic projection of the heat exchange component is a quadrilateral, and the orthographic projections of the plurality of exhaust ports are located at the four corners of the heat exchange component.

[0027] In this way, during the liquid injection process, venting can be carried out through the vents at the four corners of the heat exchange component, which helps to control the filling of the filler according to the set path. This further facilitates the overflow and venting of the foaming material, so that the foaming material can be fully foamed, evenly distributed, and fully filled in the installation space, thereby improving the filling uniformity of the filler and increasing the production cycle.

[0028] In one embodiment, the bottom wall includes a main body portion and a connecting portion protruding toward the heat exchange assembly, the connecting portion extending along the first direction and connected to the heat exchange assembly to form the exhaust port at at least one end of the connecting portion along the first direction.

[0029] The bottom wall, by providing a main body and a connecting part protruding towards the heat exchange component, not only achieves connection with the heat exchange component, but also allows the installation space to be formed between the heat exchange component and the main body. In addition, the connecting part can form an exhaust port at at least one end along the first direction to connect the receiving cavity and the installation space. This structure is simple and easy to form and assemble.

[0030] In one embodiment, the battery box includes two first connecting beams spaced apart along the first direction, the mounting space is formed between the two first connecting beams, and the end of the connecting portion together with the first connecting beams forms the exhaust port.

[0031] In this way, the expansion force of the battery cell assembly can be borne by the first connecting beam, reliably reducing the probability or degree of expansion of the battery cell assembly due to charging and / or discharging. Furthermore, the end of the connecting portion can be combined with the first connecting beam to form an exhaust port. This structure is simple and easy to mold and assemble.

[0032] In one embodiment, the battery box includes a second connecting beam extending along a third direction. The second connecting beam is connected to at least one of the heat exchange assembly, the bottom wall, and the side wall. The heat exchange assembly has injection ports on both sides of the second connecting beam in the first direction, and the battery cells are provided on both sides of the second connecting beam along the first direction, which is perpendicular to the third direction.

[0033] It can reduce the impact of the second connecting beam on the filling of the foam material, thereby increasing the production cycle time, and is conducive to the overflow and venting of the foam material, so that the foam material can be fully foamed, evenly distributed and fully filled in the installation space.

[0034] In one embodiment, the bottom wall has a confluence area and a plurality of flow channels. On the same projection plane perpendicular to the second direction, the orthographic projection of the injection port coincides with the orthographic projection of the confluence area. One end of the plurality of flow channels is connected to the confluence area, and the other end extends toward the edge of the bottom wall.

[0035] In this embodiment, by setting multiple flow channels, the foaming material is evenly guided to the edge of the installation space. This facilitates the overflow and venting of the foaming material, allowing it to fully foam, distribute evenly, and fully fill the installation space. This not only facilitates the setting of the filler but also improves the problem of insufficient strength in local areas of the bottom wall due to insufficient foaming material filling. Furthermore, it enhances the structural strength and impact resistance of the battery device.

[0036] A second aspect of this application provides an electrical device, including the battery device described above.

[0037] Since the electrical device includes the battery device provided above, the structural strength of the battery device can be improved while the filling material can be conveniently installed. Therefore, the reliability of the electrical device can be improved and the production cost of the electrical device can be reduced accordingly. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0039] Figure 2 This is a partial exploded view of a battery device according to some embodiments of this application;

[0040] Figure 3 This is a partial structural schematic diagram of a battery device according to some embodiments of this application;

[0041] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0042] Figure 5 for Figure 3 Cross-sectional view along the BB direction;

[0043] Figure 6 for Figure 5 Enlarged view of point C in the middle;

[0044] Figure 7 This is a partial structural schematic diagram of a battery device according to some embodiments of this application;

[0045] Figure 8 for Figure 7 The schematic diagram of the heat exchange component is omitted from the battery device shown.

[0046] Figure 9 This is a partial cross-sectional view of the battery device at the exhaust port in some embodiments of this application;

[0047] Figure 10 for Figure 9 The schematic diagram of the heat exchange component is omitted from the battery device shown.

[0048] Explanation of reference numerals in the attached figures:

[0049] 10. Battery cell assembly; 11. Battery cell; 20. Battery box; 21. Lower box; 211. Bottom wall; 2111. Main body; 2112. Connecting part; 212. Busbar area; 213. Flow channel; 214. Rib; 215. Side wall; 22. Upper box; 23. Receiving space; 231. Installation space; 232. Receiving cavity; 24. First connecting beam; 25. Second connecting beam; 30. Heat exchange assembly; 31. Inlet; 32. Heat exchange plate; 33. Medium flow channel; 40. Filler; 50. Exhaust port; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. Detailed Implementation

[0050] 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.

[0051] 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 belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0052] In the description of the embodiments of this application, technical terms such as "first," "second," "third," and "fourth" 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.

[0053] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. Unless otherwise specified, all embodiments and optional embodiments of this application may be combined with each other to form new technical solutions. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will understand, explicitly and implicitly, that the embodiments described herein can be combined with other embodiments. Unless otherwise specified, all technical features and optional technical features of this application may be combined with each other to form new technical solutions.

[0054] 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: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0055] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., 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 do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0056] 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.

[0057] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0058] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "projection" refers to an orthographic projection in which parallel projection lines are perpendicular to the projection plane.

[0059] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace, robotics, and many other fields.

[0060] The battery apparatus mentioned in the embodiments of this application may include multiple battery cells for providing voltage and capacity. The multiple battery cells are connected in series, parallel, or mixed connections via a busbar.

[0061] In some embodiments, a battery apparatus may include one or more battery cell assemblies. A battery cell assembly may include multiple battery cells connected in series, parallel, or in a mixed configuration via a busbar.

[0062] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, one or more battery cell assemblies can constitute a battery module, which is formed by arranging and fixing multiple battery cell assemblies together to form a single module. As an example, a battery module can be formed by bundling multiple battery cell assemblies together with cable ties.

[0063] In some embodiments, the battery device may be a battery pack, which includes a battery case and one or more individual battery cells housed within the battery case.

[0064] As an example, one or more battery cell components can constitute a battery module, and the battery cell components can be housed in a battery case by fixing the battery module in a battery case.

[0065] As an example, battery cell assemblies can also be housed in a battery box by directly fixing multiple battery cells to the battery box.

[0066] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0067] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0068] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During charging and / or discharging of the battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0069] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0070] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0071] In some embodiments, the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0072] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0073] In some embodiments, the electrode assembly has a stacked structure.

[0074] As an example, multiple positive and negative electrode plates can be set, and multiple positive and multiple negative electrode plates can be stacked alternately.

[0075] As an example, multiple positive electrode sheets can be set, and negative electrode sheets are folded to form multiple stacked folded segments, with a positive electrode sheet sandwiched between adjacent folded segments.

[0076] As an example, both the positive and negative electrode sheets are folded to form multiple stacked folded segments.

[0077] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0078] As an example, the separator can be continuously arranged between any adjacent positive or negative electrode plates by folding or rolling.

[0079] In some embodiments, the electrode assembly may be cylindrical, flat, or polygonal, etc.

[0080] In some embodiments, the electrode assembly has tabs (not shown) that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0081] In some embodiments, a battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0082] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells. There are no particular limitations in the embodiments of this application.

[0083] In some embodiments, a pressure relief mechanism is provided on the housing. The pressure relief mechanism is used to release the internal pressure of the battery cell.

[0084] In other embodiments, the pressure relief mechanism may also be referred to as an explosion-proof valve.

[0085] As an example, the internal pressure or temperature of a battery cell is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the battery cell reaches the predetermined threshold, the pressure relief mechanism is activated or a weak structure in the pressure relief mechanism is broken, thereby creating an opening or channel for the internal pressure or temperature to be released. The threshold design varies depending on the design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell.

[0086] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0087] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0088] The term "actuation" as used in this application refers to the activation or actuation of the pressure relief mechanism to a certain state, thereby releasing the internal pressure and temperature of the battery cell. The actions of the pressure relief mechanism may include, but are not limited to: movement of components within the mechanism to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the mechanism, etc. When the pressure relief mechanism is activated, the high-temperature, high-pressure substances inside the battery cell are discharged as waste from the activated portion. This method allows for pressure and temperature relief of the battery cell under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0089] The emissions from battery cells mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0090] In some embodiments, the housing is provided with electrode terminals, which pass through the housing and are electrically connected to the electrode assembly via tabs.

[0091] In some specific embodiments, the electrode terminals are made of conductive metal, such as copper or aluminum.

[0092] The "multiple" mentioned in the embodiments of this application refers to two or more.

[0093] In related technologies, electric vehicles and other electrical devices may experience battery deformation due to external impacts or debris, potentially leading to issues such as battery box cracking and individual battery cell damage. Taking sheet metal stamping housings as an example, common bottom-ball protection structures include a battery box, heat exchange components, filler, and a bottom protective plate. The bottom protective plate is positioned outside the battery box, the heat exchange components are located between the bottom protective plate and the battery box, and the filler is positioned between the heat exchange components and the battery box. The filler and heat exchange components are bonded together with adhesive, and the filler and bottom protective plate are integrally formed or bonded together. The structural adhesive between the filler, bottom protective plate, and battery box all contribute to bottom sealing. Because the filler itself slowly generates gas, and the bottom interface has good sealing performance, the generated gas increases the pressure between the bottom protective plate and the battery box. Alternatively, battery devices located at high altitudes may experience internal and external pressure differences, potentially causing the bottom protective plate to bulge. Furthermore, the installation of the bottom protective plate and the application of sealant between it and the battery box, followed by a long settling time, restricts production progress and reduces production cycle time.

[0094] In view of this, in order to improve the structural strength of the battery device while facilitating the placement of the filler, this application provides a battery device including a battery box, a heat exchange assembly, a balance valve, at least one battery cell, and a filler. The battery box includes a bottom wall and side walls surrounding the periphery of the bottom wall, the bottom wall and side walls together forming a receiving space. The heat exchange assembly is disposed within the receiving space, dividing the receiving space into a receiving cavity and an installation space, the installation space being formed between the heat exchange assembly and the bottom wall. The heat exchange assembly is provided with at least two injection ports extending along the thickness direction of the heat exchange assembly, the at least two injection ports communicating with the installation space, and the at least two injection ports being spaced apart along a first direction. At least one battery cell is disposed within the receiving cavity; the heat exchange assembly is used to contain the heat exchange medium, and the heat exchange assembly is thermally connected to at least one battery cell. Along a second direction, the battery cell, the heat exchange assembly, and the bottom wall are arranged sequentially, the first direction being perpendicular to the second direction. The filler is disposed within the installation space, and the filler is injected into the installation space through the at least two injection ports, the filler material including a foaming material. A balancing valve is located in the battery compartment and is configured to open when the air pressure within the containment space exceeds a threshold, thereby connecting the containment space to the external environment of the battery unit. Multiple vents are formed between the heat exchange assembly and the battery compartment to connect the containment cavity and the mounting space. On the same projection plane perpendicular to the second direction, the orthographic projections of the multiple vents are located at the corners of the orthographic projection of the heat exchange assembly.

[0095] The battery device provided in this application improves the heat exchange efficiency of the heat exchange component by placing it within the accommodating space, thereby enhancing the performance and reliability of the battery device. By defining an installation space between the heat exchange component and the bottom wall, and placing the filler within this space, the structural strength and impact resistance of the battery device are improved. An injection port on the heat exchange component allows foaming material to be injected into the installation space, ensuring uniform distribution between the heat exchange component and the bottom wall. Furthermore, the gas generated by the foaming material can be discharged through a balance valve, reducing the increased settling time during manufacturing due to gas production and thus improving production cycle time. Compared to placing the filler between the outside of the battery box and the bottom cover, this avoids bulging issues on the bottom cover caused by internal and external pressure differences due to gas production, and eliminates the need for sealing between the battery box and the bottom cover, thereby improving assembly efficiency and production cycle time. Furthermore, by providing at least two injection ports, liquid can be injected simultaneously through multiple ports. This improves production efficiency while ensuring the foaming material is fully foamed, evenly distributed, and completely filled within the installation space. It also facilitates the placement of fillers and addresses the issue of insufficient strength in localized areas of the bottom wall due to inadequate foaming material filling. By spacing all injection ports along the first direction, the flow and filling of the foaming material are facilitated, mitigating clogging issues. In other words, this increases production cycle time while also improving the uniformity of filler filling and addressing insufficient filling and clogging. The battery device of this application embodiment can improve the structural strength of the battery device while facilitating the placement of fillers.

[0096] Furthermore, on the same projection plane perpendicular to the second direction, by placing the orthographic projection of multiple vents at the corner of the orthographic projection of the heat exchange component, it is beneficial to the overflow and venting of the foaming material, so that the foaming material can be fully foamed, evenly distributed, and fully filled in the installation space. While facilitating the setting of the filler, it can also improve the problem of insufficient strength in local areas of the bottom wall due to insufficient filling of foaming material, and further improve the structural strength and impact resistance of the battery device by the filler.

[0097] The technical solutions described in this disclosure are applicable to electrical devices that use battery devices. The electrical device includes the battery device according to any embodiment of this disclosure, and the battery device is used to provide electrical energy.

[0098] The battery devices provided in this application can be used, but are not limited to, in vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, robots, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This disclosure does not impose any special limitations on the above-mentioned electrical equipment.

[0099] It should be noted that the technical solutions described in this disclosure are not limited to the battery devices described above, but can also be applied to all electrical devices and energy storage devices that include battery devices.

[0100] In the following embodiments, for ease of explanation, an example of an electrical device according to an embodiment of this application is a vehicle.

[0101] Please see Figure 1 The vehicle 1000 may contain a controller 200, a motor 300, and a battery device 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, it can serve as the operating power source for the vehicle 1000's electrical system, such as for the power requirements of starting, navigation, and operation. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle 1000.

[0102] In some embodiments of this application, the battery device 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 natural gas to provide driving power for the vehicle 1000.

[0103] Please see Figures 2 to 10This application provides a battery device 100, which includes a battery case 20, a heat exchange assembly 30, a balance valve, at least one battery cell 11, and a filler 40. The battery case 20 includes a bottom wall 211 and side walls 215 surrounding the periphery of the bottom wall 211, which together form a receiving space 23. The heat exchange assembly 30 is disposed within the receiving space 23, dividing the receiving space 23 into a receiving cavity 232 and a mounting space 231, which is formed between the heat exchange assembly 30 and the bottom wall 211. The heat exchange assembly 30 has at least two injection ports 31 extending along its thickness direction, communicating with the mounting space 231, and the at least two injection ports 31 are spaced apart along a first direction. At least one battery cell 11 is disposed within the receiving cavity 232; a heat exchange assembly 30 is used to contain the heat exchange medium and is thermally connected to at least one battery cell 11. The battery cell 11, heat exchange assembly 30, and bottom wall 211 are sequentially arranged along a second direction, with the first direction perpendicular to the second direction. A filler 40 is disposed within the mounting space 231 and is injected into the mounting space 231 through at least two injection ports 31. The filler 40 is made of a foaming material. A balance valve is disposed in the battery housing 20 and is configured to open when the air pressure within the receiving space 23 exceeds a threshold, thereby connecting the receiving space 23 to the external environment of the battery device 100.

[0104] The battery box 20 can be a simple three-dimensional structure such as a cuboid, cylinder, or sphere, or it can be a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres.

[0105] The battery box 20 is used to install the battery cell 11. The battery box 20 can carry the battery cell 11, and the battery cell 11 is installed to the electrical equipment through the battery box 20.

[0106] For example, the battery box 20 is typically a cuboid structure. Both its length and width directions are parallel to the horizontal plane, and its length is parallel to the longest side of the cuboid structure. The height of the battery box 20 is perpendicular to the ground. For example, the length direction of the battery box 20 may be a first direction, the width direction a third direction, and the height direction a second direction; or the length direction may be a third direction, the width direction a first direction, and the height direction a second direction.

[0107] For example, such as Figure 3 and Figure 5 As shown, the first direction is represented by X, the second direction by Y, and the third direction by Z.

[0108] In some embodiments, the battery box 20 includes a lower box 21, which is constructed by stamping sheet metal.

[0109] For example, the lower housing 21 can be a basin-shaped structure formed by stamping sheet metal.

[0110] By constructing the lower housing 21 as a sheet metal stamping, the structure is simple, easy to form, and can reduce the weight of the battery box 20 to a certain extent.

[0111] For example, the lower housing 21 includes a bottom wall 211 and a side wall 215 surrounding the periphery of the bottom wall 211, the bottom wall 211 and the side wall 215 together forming an accommodating space 23.

[0112] In some embodiments, the battery box 20 includes an upper box 22, which is constructed by stamping sheet metal.

[0113] For example, the upper housing 22 can be a basin-shaped structure formed by stamping sheet metal.

[0114] In other embodiments, the battery box 20 includes an upper box 22, which is constructed as a plate-like structure formed of sheet metal.

[0115] By placing the heat exchange assembly 30 within the receiving space 23, the heat exchange assembly 30 divides the receiving space 23 into a receiving cavity 232 and a mounting space 231. The mounting space 231 is formed between the heat exchange assembly 30 and the bottom wall 211. The heat exchange assembly 30 can be placed at the bottom of the battery cell 11, thereby directly exchanging heat with the battery cell 11 and improving the heat exchange efficiency of the battery cell 11. In addition, the filler 40 is placed within the mounting space 231, which helps to improve the structural strength and impact resistance of the battery device 100.

[0116] In some embodiments, the heat exchange component 30 is a metal plate. For example, the material of the heat exchange component 30 may be aluminum alloy, aluminum, etc.

[0117] Here, by setting the heat exchange component 30 as a metal plate, the metal plate has both good structural strength and good thermal conductivity. In other words, while ensuring that the heat exchange component 30 has a certain heat exchange efficiency, it can also ensure that the heat exchange component 30 has a certain structural strength.

[0118] For example, please refer to Figure 5 and Figure 6 The heat exchange assembly 30 includes two heat exchange plates 32 stacked together, with a medium flow channel 33 defined between the two heat exchange plates 32.

[0119] A balance valve is located in the battery compartment 20 and is configured to open when the gas pressure in the containment space 23 exceeds a threshold, thereby connecting the containment space 23 to the external environment of the battery device 100. Thus, when the gas produced by the foaming material causes the gas pressure in the containment space 23 to exceed the threshold, the balance valve opens, and the gas in the containment space 23 can be discharged to the outside of the battery device 100.

[0120] In some embodiments, please refer to Figure 2 The number of battery cells 11 is multiple, and the multiple battery cells 11 are arranged along a first direction to form a battery cell assembly 10. The multiple battery cell assemblies 10 are spaced apart along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0121] In other words, the arrangement direction of the battery cells 11 in the battery cell assembly 10 and the spacing direction of all injection ports 31 are both the first direction. By rationally arranging the battery cells 11, the structural strength of the battery device 100 can be improved while facilitating the placement of the filler 40.

[0122] It should be noted that the specific type of foaming material is not limited here. For example, the foaming material can be rigid polyurethane foam (RPUF, often abbreviated as RPU), which has excellent thermal insulation, mechanical and chemical resistance properties.

[0123] The heat exchange component 30 is provided with at least two injection ports 31 extending through the thickness direction of the heat exchange component 30. Thus, after the heat exchange component 30 is assembled, foaming material can be injected into the installation space 231 through the injection ports 31. The foaming material is evenly filled into the installation space 231, which improves the structural strength of the battery device 100 and facilitates the placement of the filler 40.

[0124] It should be noted that the shape of the injection port 31 includes, but is not limited to, circles, ellipses, polygons, etc.

[0125] Please see Figure 3 The heat exchange component 30 is equipped with multiple injection ports 31, which can simultaneously inject liquid through multiple injection ports 31, improving production efficiency and mitigating the problem of potential blockage that may occur when injecting liquid through a single injection port 31. This ensures that the foaming material is fully foamed, evenly distributed, and fully filled within the installation space 231. In addition to facilitating the installation of the filler 40, it can also improve the problem of insufficient strength in local areas of the bottom wall 211 due to insufficient filling of foaming material.

[0126] Please see Figure 3All injection ports 31 are spaced apart along the first direction to facilitate the flow and filling of foam material, improve the filling uniformity of filler 40, and further improve the situation of insufficient filling and blockage.

[0127] Furthermore, in embodiments where the number of injection ports 31 is greater than or equal to three, the injection time is controlled to increase sequentially from the middle to both sides. In other words, the injection time of each injection port 31 can be controlled by the injection equipment. The injection time of the middle injection port 31 is short, and the injection time of the two side injection ports 31 is long. In this way, while improving the production cycle, the filling uniformity of the filler 40 can also be improved, and the situation of bulging in the middle caused by the excessive injection time of the middle injection port 31 can be improved to a certain extent.

[0128] The battery device 100 provided in this application improves the heat exchange efficiency of the heat exchange component 30 by placing it within the receiving space 23, thereby enhancing the performance and reliability of the battery device 100. By defining an installation space 231 between the heat exchange component 30 and the bottom wall 211, and placing the filler 40 within the installation space 231, the structural strength and impact resistance of the battery device 100 are improved. By providing an injection port 31 on the heat exchange component 30, foaming material can be injected into the installation space 231 through the injection port 31, so that the foaming material is evenly distributed between the heat exchange component 30 and the bottom wall 211. In addition, the gas generated by the foaming material can be discharged through the balance valve, thereby reducing the standing time caused by the gas generation of the foaming material during the manufacturing process, and thus improving the production cycle. Compared with placing the filler 40 between the outside of the battery box 20 and the bottom cover plate, the problem of bulging of the bottom cover plate caused by the pressure difference between the inside and outside of the foaming material due to gas generation can be avoided, and the sealing operation between the battery box 20 and the bottom cover plate can be eliminated, thereby improving assembly efficiency and production cycle. Furthermore, by providing at least two injection ports 31, liquid can be injected simultaneously through multiple injection ports 31. This improves production efficiency while ensuring that the foaming material is fully foamed, evenly distributed, and fully filled within the installation space 231. It also facilitates the placement of the filler 40 and addresses the issue of insufficient strength in localized areas of the bottom wall 211 due to inadequate foaming material filling. By arranging all injection ports 31 at intervals along the first direction, the flow and filling of the foaming material are facilitated, mitigating clogging issues. In other words, while increasing the production cycle time, it also improves the filling uniformity of the filler 40, addressing insufficient filling and clogging. The battery device 100 of this embodiment can improve the structural strength of the battery device 100 while facilitating the placement of the filler 40.

[0129] In some embodiments, please refer to Figure 3 and Figure 7The distance between two adjacent injection ports 31 is 300mm-450mm.

[0130] The distance between two adjacent injection ports 31 can be any one of 300mm, 310mm, 320mm, 330mm, 340mm, 350mm, 360mm, 370mm, 380mm, 390mm, 400mm, 410mm, 420mm, 430mm, 440mm, 450mm or any two of them.

[0131] It is understandable that the smaller the distance between two adjacent injection ports 31, the shorter the required injection time, which is more conducive to improving the production cycle. The larger the distance between two adjacent injection ports 31, the smaller the impact on the design and structural strength of the heat exchange component 30.

[0132] Thus, by setting the distance between two adjacent injection ports 31 to 300mm-450mm, the impact on the design and structural strength of the heat exchange component 30 can be minimized while increasing the production cycle.

[0133] In some embodiments, the dimension of the heat exchange component 30 in the first direction is larger than the dimension of the heat exchange component 30 in the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0134] In other words, the injection ports 31 are spaced apart along the direction with the larger size of the heat exchange component 30. When the spacing between adjacent injection ports 31 is the same, after the filler 40 is injected into the installation space 231 through the injection port 31, the distance to be filled to both sides along the third direction is relatively short, which is conducive to further improving the production cycle.

[0135] Furthermore, since the size of the heat exchange component 30 in the first direction is larger than the size of the heat exchange component 30 in the third direction, when the spacing between adjacent injection ports 31 is the same, the number of injection ports 31 that can be set in the heat exchange component 30 in the first direction is greater than the number of injection ports 31 that can be set in the third direction along the heat exchange component 30. The increase in the number of injection ports 31 is beneficial to further improve the production cycle time.

[0136] In some embodiments, please refer to Figure 3 The heat exchange component 30 passes through the center of the injection port 31 on a third-direction axis of symmetry.

[0137] The heat exchange component 30 is symmetrical about a third direction axis, such as Figure 3 L1 in the diagram represents the axis of symmetry. The axis of symmetry is a virtual axis artificially defined to describe the distribution of multiple injection ports 31, and is not a real structure existing on the product.

[0138] In other words, the center of the injection port 31 is equidistant from the edges of the heat exchange component 30 on both sides in the third direction.

[0139] In this way, after the filler 40 is injected into the installation space 231 through the injection port 31, the time required to fill to the edges of the heat exchange component 30 in the third direction is the same, which helps to improve the filling uniformity of the filler 40 and increase the production cycle.

[0140] In some embodiments, please refer to Figure 3 At least two injection ports 31 are arranged symmetrically about the axis of symmetry of the heat exchange assembly 30 in the first direction.

[0141] The axis of symmetry of the heat exchange component 30 in the first direction is as follows: Figure 3 L2 in the diagram represents the axis of symmetry. The axis of symmetry is a virtual axis artificially defined to describe the distribution of multiple injection ports 31, and is not a real structure existing on the product.

[0142] In other words, the distance between the center of the injection port 31 and the edges of the heat exchange assembly 30 on both sides in the first direction is equal.

[0143] In this way, after the filler 40 is injected into the installation space 231 through the injection port 31, the time required to fill to the edges of the heat exchange component 30 on both sides in the first direction is the same, which helps to improve the filling uniformity of the filler 40 and increase the production cycle.

[0144] In some embodiments, please refer to Figure 4 , Figures 7 to 10 Multiple exhaust ports 50 are formed between the heat exchange component 30 and the battery box 20 to connect the receiving cavity 232 and the installation space 231. On the same projection plane perpendicular to the second direction, the orthographic projection of the multiple exhaust ports 50 is located at the corner of the orthographic projection of the heat exchange component 30.

[0145] This facilitates the overflow and venting of the foam material, allowing it to fully foam, distribute evenly, and fill the installation space 231. While facilitating the placement of the filler 40, it also improves the problem of insufficient strength in local areas of the bottom wall 211 due to insufficient foam material filling, further enhancing the structural strength and impact resistance of the battery device 100 thanks to the filler 40.

[0146] By setting multiple exhaust ports 50, the exhaust efficiency is improved and the situation of poor internal circulation caused by internal gas accumulation in the installation space 231 is improved. At the same time, it can also improve the situation of corrosion of heat exchange components 30 caused by accumulated gas remaining for too long, which is conducive to extending service life.

[0147] The orthographic projections of the multiple vent ports 50 are located at the corners of the orthographic projections of the heat exchange component 30. In other words, during the liquid injection process, venting only from the corners of the heat exchange component 30 helps to control the filling of the filler 40 along a set path. In addition, it can also prevent the filler 40 from leaking from the middle area of ​​the heat exchange component 30 in the first direction, thus avoiding the problem of affecting adjacent components and reducing the filling pressure. This can improve the problem of insufficient filling, especially in areas far from the injection port 31, such as the corners of the heat exchange component 30. In other words, by placing the orthographic projections of the multiple vent ports 50 at the corners of the orthographic projections of the heat exchange component 30, the problem of insufficient filling in areas far from the injection port 31, such as the corners of the heat exchange component 30, can be improved, the filling uniformity of the filler 40 can be enhanced, and the leakage of the filler 40 from the middle area of ​​the heat exchange component 30 in the first direction can be minimized.

[0148] There are several ways to set the exhaust port 50.

[0149] In some embodiments, please refer to Figures 7 to 10 The injection port 31 is provided with exhaust ports 50 on both sides in the first direction.

[0150] This means that all the injection ports 31 are provided with exhaust ports 50 on both sides of the first direction. In other words, the heat exchange component 30 is provided with exhaust ports 50 at both ends of the first direction.

[0151] This will help to further improve the filling uniformity of filler 40 and increase production cycle time.

[0152] In some embodiments, please refer to Figure 3 and Figure 7 The orthographic projection of the heat exchange component 30 is a quadrilateral, and the orthographic projections of the multiple exhaust ports 50 are located at the four corners of the heat exchange component 30.

[0153] Thus, during the liquid injection process, venting can be achieved through the vents 50 at the four corners of the heat exchange component 30, which helps to control the filling of the filler 40 according to the set path. This further facilitates the overflow and venting of the foaming material, so that the foaming material can be fully foamed, evenly distributed, and fully filled in the installation space 231, thereby improving the filling uniformity of the filler 40 and increasing the production cycle.

[0154] For example, the orthographic projection of the heat exchange component 30 is a rectangle.

[0155] In some embodiments, please refer to Figure 6 , Figures 8 to 10The bottom wall 211 includes a main body 2111 and a connecting portion 2112 protruding toward the heat exchange assembly 30. The connecting portion 2112 extends along a first direction and is connected to the heat exchange assembly 30 to form an exhaust port 50 at at least one end of the connecting portion 2112 along the first direction.

[0156] In other words, the exhaust port 50 is located at at least one end of the connecting portion 2112 along the first direction. It can be that the exhaust port 50 is located at one end of the connecting portion 2112 along the first direction, or that the exhaust port 50 is formed at both ends of the connecting portion 2112 along the first direction.

[0157] As an example, the main body 2111 is provided with connecting parts 2112 at both ends along the third direction, that is, the two connecting parts 2112 are spaced apart along the third direction and connected to the two ends of the heat exchange assembly 30 along the third direction. The main body 2111 located at the end of the connecting part 2112 in the first direction is spaced apart from the heat exchange assembly 30 and forms an exhaust port 50.

[0158] The bottom wall 211, by providing a main body 2111 and a connecting part 2112 protruding toward the heat exchange assembly 30, can connect with the heat exchange assembly 30 while also allowing the installation space 231 to be formed between the heat exchange assembly 30 and the main body 2111. In addition, the connecting part 2112 can form an exhaust port 50 at at least one end along the first direction to connect the receiving cavity 232 and the installation space 231. This structure is simple and easy to form and assemble.

[0159] In some embodiments, please refer to Figures 7 to 8 The battery box 20 includes two first connecting beams 24 spaced apart along a first direction, and an installation space 231 is formed between the two first connecting beams 24. The end of the connecting part 2112 and the first connecting beams 24 together form an exhaust port 50.

[0160] It should be noted that the first connecting beam 24 can also be referred to as an expansion beam.

[0161] For example, the first connecting beam 24 is connected to the side wall 215 at both ends in a third direction.

[0162] For example, the bottom of the first connecting beam 24 is connected to the heat exchange assembly 30 or the bottom wall 211.

[0163] Two first connecting beams 24 are spaced apart along a first direction, and the battery cell assembly 10 is disposed between two adjacent first connecting beams 24. In this way, the first connecting beams 24 can bear the expansion force of the battery cell assembly 10, reliably reducing the probability of the battery cell assembly 10 expanding due to charging and / or discharging, or mitigating the degree of expansion. Furthermore, the end of the connecting portion 2112 can be arranged together with the first connecting beams 24 to form an exhaust port 50. This structure is simple and easy to mold and assemble.

[0164] In other embodiments, the end of the connecting portion 2112 and the side wall 215 may together form an exhaust port 50.

[0165] In some embodiments, please refer to Figures 7 to 8 The battery box 20 includes a second connecting beam 25, which extends along a third direction. The second connecting beam 25 is connected to at least one of the heat exchange assembly 30, the bottom wall 211, and the side wall 215. The heat exchange assembly 30 has injection ports 31 on both sides of the second connecting beam 25 in a first direction, and battery cells 11 are provided on both sides of the second connecting beam 25 along the first direction, which is perpendicular to the third direction.

[0166] It should be noted that the second connecting beam 25 can also be referred to as an expansion beam.

[0167] The second connecting beam 25 can bear the expansion force of the battery cell assembly 10, reliably reducing the probability of the battery cell assembly 10 expanding due to charging and / or discharging, or mitigating the degree of expansion of the battery cell assembly 10 due to charging and / or discharging.

[0168] The connection between the second connecting beam 25 and at least one of the heat exchange assembly 30, the bottom wall 211, and the side wall 215 includes various cases. It can be connected to one of the heat exchange assembly 30, the bottom wall 211, and the side wall 215, or it can be connected to two of the heat exchange assembly 30, the bottom wall 211, and the side wall 215, or it can be connected to all of the heat exchange assembly 30, the bottom wall 211, and the side wall 215.

[0169] It is understandable that the setting of the second connecting beam 25 may affect the overflow of the foam material in the installation space 231. Therefore, by setting the injection ports 31 on both sides of the second connecting beam 25 in the first direction, the heat exchange component 30 can reduce the impact of the second connecting beam 25 on the filling of the foam material, thereby improving the production cycle and facilitating the overflow and venting of the foam material, so that the foam material can be fully foamed, evenly distributed, and fully filled in the installation space 231.

[0170] Of course, in other embodiments, the number of second connecting beams 25 may be multiple.

[0171] In some embodiments, please refer to Figures 7 to 8 The bottom wall 211 has a confluence area 212 and multiple flow channels 213. On the same projection plane perpendicular to the second direction, the orthographic projection of the injection port 31 coincides with the orthographic projection of the confluence area 212. One end of the multiple flow channels 213 is connected to the confluence area 212, and the other end extends to the edge of the bottom wall 211.

[0172] In other words, the confluence area 212 is the area corresponding to the bottom wall 211 and the injection port 31. The foaming material injected from the injection port 31 first flows to the confluence area 212, and then is distributed to each guide channel 213 through the confluence area 212.

[0173] For example, the merging area 212 corresponds one-to-one with the injection port 31.

[0174] Inlet 31 is located in the area near the middle of heat exchange component 30. Correspondingly, confluence area 212 is located in the area near the middle of bottom wall 211. Guide channel 213 extends from confluence area 212 to the edge of bottom wall 211. In this way, foaming material can be evenly guided to the periphery of installation space 231 so that filler 40 is evenly filled in installation space 231.

[0175] The specific angle, direction, and number of the flow channels 213 can be used to ensure sufficient overflow of adhesive within the installation space 231.

[0176] In this embodiment, by setting multiple flow channels 213, the multiple flow channels 213 are used to uniformly guide the foaming material to the edge of the installation space 231, which is conducive to the overflow and venting of the foaming material, so that the foaming material is fully foamed, evenly distributed and fully filled in the installation space 231. While facilitating the setting of the filler 40, it can also improve the problem of insufficient strength in local areas of the bottom wall 211 due to insufficient filling of foaming material, and further improve the structural strength and impact resistance of the battery device 100 by the filler 40.

[0177] There are several ways to set up the flow channel 213.

[0178] In some embodiments, a plurality of flow channels 213 are arranged at circumferential intervals along the confluence region 212.

[0179] Since one end of each flow channel 213 is connected to the confluence area 212 and the other end extends to the edge of the bottom wall 211, and each flow channel 213 is arranged at intervals along the circumference of the confluence area 212, that is, the flow channels 213 are radially distributed in the circumference of the confluence area 212, which further promotes the full foaming, uniform distribution and full filling of the foaming material in the installation space 231.

[0180] This facilitates the flow of foaming material from the confluence area 212 to the surrounding areas through multiple flow channels 213, thereby further improving the uniform distribution and full filling of the foaming material.

[0181] In some embodiments, please refer to Figures 8 to 10 Multiple flow channels 213 are arranged symmetrically about a symmetrical plane, with the symmetrical plane passing through the center of the injection port 31.

[0182] The symmetry plane is a virtual plane artificially defined to describe the distribution of multiple flow channels 213, and is not a real structure on the product.

[0183] In this way, the foaming material can be evenly distributed to the areas on both sides of the symmetrical plane of the installation space 231.

[0184] In some embodiments, at least a portion of the flow channel 213 extends in a direction perpendicular to the plane of symmetry.

[0185] This facilitates the rapid flow of foamed material to the edge of the installation space 231 in a direction perpendicular to the plane of symmetry. In an embodiment where the electrical device is a vehicle 1000 and the forward and backward direction of the vehicle 1000 is perpendicular to the plane of symmetry, extending at least a portion of the flow channel 213 in a direction perpendicular to the plane of symmetry helps to reduce the wind resistance of the vehicle 1000 during travel.

[0186] Here, either a portion of the flow channel 213 extends in a direction perpendicular to the plane of symmetry, or all of the flow channel 213 extends in a direction perpendicular to the plane of symmetry.

[0187] In one specific embodiment, a portion of the flow channel 213 extends in a direction perpendicular to the plane of symmetry, while another portion of the flow channel 213 is inclined relative to the plane of symmetry.

[0188] In another specific embodiment, a portion of the flow guiding channel 213 extends in a direction parallel to the plane of symmetry, a portion of the flow guiding channel 213 extends in a direction perpendicular to the plane of symmetry, and a portion of the flow guiding channel 213 is simultaneously inclined relative to the plane of symmetry.

[0189] It should be noted that there are multiple ways to form the flow channel 213.

[0190] In some embodiments, please refer to Figure 8 and Figure 10 A portion of the surface of the bottom wall 211 facing the cavity 232 protrudes to form a rib 214, and a flow channel 213 is defined between adjacent ribs 214.

[0191] For example, a portion of the side surface of the bottom wall 211 facing the receiving cavity 232 protrudes to form a rib 214, so that the corresponding side surface of the bottom wall 211 opposite to the receiving cavity 232 is recessed to form a groove.

[0192] In this way, while guiding the foamed material, the structural strength of the battery box 20 is improved. In addition, since the bottom wall 211 is recessed on the side opposite to the receiving cavity 232, the wind resistance of the battery box 20 can be reduced as much as possible.

[0193] In some embodiments, a portion of the side surface of the bottom wall 211 facing the receiving cavity 232 is recessed to form a groove, which defines a flow channel 213.

[0194] For example, a rib 214 is formed on the side surface of the bottom wall 211 opposite to the receiving cavity 232, so that the bottom wall 211 is recessed on the side surface facing the receiving cavity 232 to form a groove, and the groove defines the flow channel 213.

[0195] In this way, the structural strength of the battery box 20 is improved while the foam material is guided.

[0196] In some embodiments, the electrical device is configured as a vehicle 1000, and a plurality of flow channels 213 are formed on the bottom wall 211, all of which extend along the front-rear direction of the vehicle 1000.

[0197] This facilitates the rapid flow of foam material to the edge of the installation space 231 in the front-rear direction of the vehicle 1000, and also helps to reduce the wind resistance of the vehicle 1000 during travel.

[0198] In the description of this application, the references to terms such as "in one embodiment," "in some embodiments," "in other embodiments," "in yet another embodiment," or "exemplary," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine the different embodiments or examples described in this application, as well as the features of the different embodiments or examples.

[0199] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A battery device, characterized in that, The battery device includes: A battery box, the battery box including a bottom wall and side walls surrounding the periphery of the bottom wall, the bottom wall and the side walls together forming an accommodating space; A heat exchange assembly is disposed within the receiving space, the heat exchange assembly divides the receiving space into a receiving cavity and an installation space, the installation space is formed between the heat exchange assembly and the bottom wall, the heat exchange assembly is provided with at least two injection ports extending through the thickness direction of the heat exchange assembly, the at least two injection ports communicate with the installation space, and the at least two injection ports are spaced apart along a first direction; At least one battery cell is disposed within the receiving cavity; the heat exchange assembly is used to contain the heat exchange medium and is thermally connected to the at least one battery cell; along the second direction, the battery cell, the heat exchange assembly, and the bottom wall are arranged sequentially, and the first direction is perpendicular to the second direction; A filler is disposed within the mounting space, and the filler is injected into the mounting space through the at least two injection ports. The material of the filler includes a foaming material. A balance valve is disposed in the battery compartment and is configured to open when the air pressure in the containment space is greater than a threshold, so as to connect the containment space and the external environment of the battery device; Multiple vents are formed between the heat exchange component and the battery box to connect the receiving cavity and the installation space. On the same projection plane perpendicular to the second direction, the orthographic projection of the multiple vents is located at the corner of the orthographic projection of the heat exchange component.

2. The battery device according to claim 1, characterized in that, The dimension of the heat exchange component in the first direction is larger than the dimension of the heat exchange component in the third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

3. The battery device according to claim 1, characterized in that, The number of battery cells is multiple, and the multiple battery cells are arranged along the first direction to form a battery cell assembly. The multiple battery cell assemblies are spaced apart along a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

4. The battery device according to claim 1, characterized in that, The distance between two adjacent injection ports is 300mm-450mm.

5. The battery device according to claim 1, characterized in that, The heat exchange assembly has a third-direction axis of symmetry passing through the center of the injection port, and the first direction, the second direction, and the third-direction are perpendicular to each other.

6. The battery device according to claim 1, characterized in that, The at least two injection ports are arranged symmetrically about the axis of symmetry of the heat exchange assembly in a first direction.

7. The battery device according to any one of claims 1 to 6, characterized in that, The injection port is provided with the exhaust port on both sides of the first direction.

8. The battery device according to claim 1, characterized in that, The orthographic projection of the heat exchange component is a quadrilateral, and the orthographic projections of the plurality of exhaust ports are located at the four corners of the heat exchange component.

9. The battery device according to claim 1, characterized in that, The bottom wall includes a main body and a connecting portion protruding toward the heat exchange assembly. The connecting portion extends along the first direction and is connected to the heat exchange assembly to form the exhaust port at at least one end of the connecting portion along the first direction.

10. The battery device according to claim 9, characterized in that, The battery box includes two first connecting beams spaced apart along the first direction, the mounting space is formed between the two first connecting beams, and the end of the connecting part together with the first connecting beams forms the exhaust port.

11. The battery device according to claim 1, characterized in that, The battery box includes a second connecting beam extending along a third direction. The second connecting beam is connected to at least one of the heat exchange assembly, the bottom wall, and the side wall. The heat exchange assembly has injection ports on both sides of the second connecting beam in the first direction, and the battery cells are provided on both sides of the second connecting beam along the first direction, which is perpendicular to the third direction.

12. The battery device according to any one of claims 1 to 6, characterized in that, The bottom wall has a confluence area and multiple flow channels. On the same projection plane perpendicular to the second direction, the orthographic projection of the injection port coincides with the orthographic projection of the confluence area. One end of the multiple flow channels is connected to the confluence area, and the other end extends to the edge of the bottom wall.

13. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1 to 12.

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