A battery device and an electrical device

Abstract

This application provides a battery device and an electrical device. The battery device is characterized by comprising a housing, a thermal management component, and a battery cell assembly. The housing includes a cover plate and a shell assembly. The cover plate covers the shell assembly along a first direction to form an installation space. The thermal management component is located within the installation space and has a first channel. The pressure relief mechanism of the battery cell is oriented intersecting the first direction. The shell assembly includes a side shell and a bottom wall. The bottom wall is disposed opposite to the cover plate along the first direction. The side shell connects the cover plate and the bottom wall and has a second channel. The first channel communicates with the second channel. A portion of the side shell protrudes into the installation space to form a first side beam, which surrounds the second channel. The battery device in this application embodiment ensures that the emissions released by the pressure relief structure under thermal runaway conditions will not directly impact the cover plate and shell assembly along the first direction, reducing the probability of separation between the cover plate and shell assembly due to the impact of the emissions.

Description

Technical Field

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

[0002] In related technologies, a battery device includes individual battery cells and a housing, with the individual battery cells located inside the housing. The housing is formed by assembling multiple different parts.

[0003] In the event of thermal runaway in a single battery cell, the cell will discharge high-temperature, high-pressure waste into the casing. The waste will then be discharged out of the casing through internal channels to relieve pressure.

[0004] The emissions can impact the parts that are assembled to form the enclosure, posing a risk of the enclosure cracking. Summary of the Invention

[0005] The inventors of this application have discovered that in the event of thermal runaway of a battery cell, the releases emitted by the battery cell can impact the casing, which may lead to a decrease in the sealing performance of the casing or even its breakage.

[0006] In view of this, the embodiments of this application aim to provide a battery device and an electrical device that are beneficial to reducing the adverse effects of the impact of emissions from individual battery cells on the sealing performance of the casing.

[0007] To achieve this objective, the technical solution of this application embodiment is implemented as follows:

[0008] A battery device, comprising:

[0009] The housing includes a cover plate and a housing assembly, wherein the cover plate is disposed on the housing assembly along a first direction and forms an installation space with the housing assembly;

[0010] A thermal management component is located within the installation space. The thermal management component is provided with a first channel for conveying a heat exchange medium.

[0011] A battery cell assembly includes a battery cell located within the mounting space. The battery cell includes a housing and an electrode assembly housed within the housing. The housing includes multiple walls, including a first wall. The orthographic projection of the electrode assembly onto the first wall is larger than that onto the other walls. The first wall is heat-exchangeably connected to the thermal management assembly along a first direction. The orientation of the pressure relief mechanism of the battery cell intersects with the first direction.

[0012] The housing assembly includes a side housing and a bottom wall. The bottom wall is disposed opposite to the cover plate along the first direction. The side housing connects the cover plate and the bottom wall. The side housing is provided with a second channel. The first channel communicates with the second channel. A portion of the side housing protrudes into the installation space on the side facing the installation space to form a first side beam. The first side beam surrounds the second channel.

[0013] In the battery device of this application embodiment, the pressure relief mechanism of the battery cell is oriented to intersect with the first direction, so that the emissions released by the pressure relief structure in the thermal runaway state will not directly impact the cover plate and housing assembly along the first direction. This reduces the probability of the sealing performance of the cover plate and housing assembly deteriorating or even separating due to the impact of the emissions, and reduces the risk of the housing disintegrating in the thermal runaway state. The thermal management component contacts the battery cell along the first direction, and while realizing thermal management of the battery cell, it can also shield the emissions released by the pressure relief structure, further reducing the risk of the emissions spreading along the first direction and impacting the cover plate and housing assembly. It utilizes the space of the internal structure of the side housing to reduce even This eliminates the need for additional pipes within the installation space to facilitate the flow of heat exchange medium between the second channel and the first channel, improving space utilization and reducing the risk of interference between the second channel and other components within the installation space. The second channel for transporting the heat exchange medium is formed directly using the space inside the first side beam. The hollow structure of the first side beam helps reduce the weight of the housing and facilitates the lightweighting of the battery device. Furthermore, it reduces or eliminates the need for additional pipes for transporting the heat exchange medium within the installation space, allowing for the placement of individual battery cells and other components. This reduces the number of components in the battery device, making its structure more compact and increasing its energy density.

[0014] In some embodiments, the first side beam extends along a second direction, and there are multiple first side beams, which are spaced apart from each other along a first direction, with an exhaust groove formed between two adjacent first side beams; and / or, an exhaust groove is formed between the first side beam and the cover plate; and / or an exhaust groove is formed between the first side beam and the bottom wall.

[0015] The venting channel opens into the installation space along a third direction, and at least a portion of the pressure relief mechanisms of the battery cells face the venting channel. The first direction, the second direction, and the third direction intersect each other. Thus, directly utilizing the space between the first side beam and the bottom wall to form the venting channel improves space utilization and makes the battery device structure more compact.

[0016] In some embodiments, the battery device further includes a first reinforcing beam disposed in the mounting space and connected to the housing assembly, the first reinforcing beam separating the mounting space; battery cells are disposed on both sides of the first reinforcing beam. Thus, the first reinforcing beam strengthens the housing, further improving its structural strength; and it also suppresses the compression of the battery cells caused by housing deformation.

[0017] In some embodiments, the first reinforcing beam is provided with a third channel, which connects the first channel and the second channel. Thus, by providing a third channel in the first reinforcing beam, it is beneficial to further improve the space utilization within the battery device, and the third channel allows for more flexible arrangement of the second and first channels, thereby facilitating the arrangement of thermal management components, battery cells, and other components within the installation space.

[0018] In some embodiments, the battery device further includes a second reinforcing beam disposed in the mounting space and connected to the housing assembly, the second reinforcing beam separating the mounting space; the battery device includes a high-voltage control assembly, the high-voltage control assembly and the battery cells are respectively disposed on opposite sides of the second reinforcing beam. Thus, the second reinforcing beam strengthens the housing, further improving its structural strength; the second reinforcing beam separates the high-voltage control assembly and the battery cells, allowing for independent space for their arrangement and suppressing deformation of the housing from compressing the high-voltage control assembly and battery cells.

[0019] In some embodiments, the second reinforcing beam is provided with a fourth channel, which connects the first channel and the second channel. Thus, by providing a fourth channel in the second reinforcing beam, it is beneficial to further improve the space utilization within the battery device, and the fourth channel allows for more flexible arrangement of the second and first channels, thereby facilitating the arrangement of thermal management components, battery cells, and other components within the installation space.

[0020] In some embodiments, the battery device further includes a first reinforcing beam and a second reinforcing beam disposed in the mounting space;

[0021] The first reinforcing beam extends along the second direction and connects to the housing assembly. The first reinforcing beam separates the installation space. Battery cells and thermal management components are provided on opposite sides of the first reinforcing beam along the third direction.

[0022] The second reinforcing beam extends along the third direction and connects to the housing assembly. The second reinforcing beam separates the installation space. The battery device includes a high-voltage control assembly, and the high-voltage control assembly and the battery cells are located on opposite sides of the second reinforcing beam along the second direction.

[0023] The first reinforcing beam has a third channel, and the first channel, the second channel, and the third channel are connected; the first direction, the second direction, and the third direction intersect each other. Thus, the cooperation between the first and second reinforcing beams helps to further improve the overall structural reduction of the battery device, better suppress the adverse effects of casing deformation on the battery cells and high-voltage control components, and achieves the purpose of inputting and outputting heat exchange medium to the thermal management components.

[0024] In some embodiments, the side housing includes two first housings disposed opposite each other along the third direction and two second housings disposed opposite each other along the second direction, wherein the two ends of the first reinforcing beam are respectively connected to the two second housings, and the two ends of the second reinforcing beam are respectively connected to the two first housings;

[0025] The second channel includes a first sub-channel and a second sub-channel. At least one of the two first housings forms the first sub-channel, and at least one of the two second housings forms the second sub-channel. The first sub-channel, the second sub-channel, the first channel, and the third channel are interconnected. Thus, through the first sub-channel in the first housing and the second sub-channel in the second housing, the heat exchange medium can flow between the first reinforcing beam and the thermal management components, improving the space utilization of the housing structure and making the battery device structure more compact.

[0026] In some embodiments, the first housing includes a first sub-housing and a second sub-housing arranged sequentially along the second direction, the first sub-housing being disposed opposite to the high-voltage control assembly along the third direction, the first sub-housing forming a first sub-flow channel, and the second reinforcing beam connecting the first sub-housing;

[0027] In the second housing, on the same side as the high-voltage control component located in the battery cell, a plurality of second sub-channels are formed. A portion of the second sub-channels communicate with the first sub-channels, and another portion communicates with the third channel. This allows the heat exchange medium in the first channel to be continuously renewed, improving heat exchange efficiency.

[0028] In some embodiments, a medium inlet and a medium outlet are further formed in one of the second housings located on the same side as the high-voltage control assembly of the battery cell. The medium inlet connects the outside of the battery device with the second sub-channel, and the medium outlet connects the third channel with the outside of the battery device.

[0029] The heat exchange medium can flow along a path sequentially passing through the medium inlet, the second sub-channel, the first sub-channel, the first channel, the third channel, and the medium outlet. This enables the circulation of the heat exchange medium between the battery device and other external devices, facilitating cooling of the heat exchange medium after heat exchange and improving the heat exchange efficiency of the individual battery cells.

[0030] In some embodiments, the thermal management component includes a first thermal management component, which includes a first busbar channel, a second busbar channel, and a plurality of first branch channels. The first branch channels extend along a second direction. The first busbar channel and the second busbar channel both extend along a third direction and are located on opposite sides of the first branch channel along the first direction and communicate with the first branch channel. The first sub-channel communicates with the first busbar channel, and the third channel communicates with the second busbar channel. The first busbar channel, the second busbar channel, and the first branch channels together form the second channel. This facilitates the heat exchange medium to flow along a longer path in the second direction within the first thermal management component, enabling it to exchange heat with more battery cells arranged along the second direction and improving heat exchange efficiency.

[0031] In some embodiments, a plurality of the battery cells are arranged along the second direction to form a first battery cell group. The first battery cell group is located on one side of the first thermal management component along the first direction. In a projection plane perpendicular to the first direction, the projection of the first shunt channel passes through the projection of the first battery cell group along the second direction. This allows the heat exchange medium to exchange heat with each battery cell in the first battery cell group in a single flow along the second direction, without requiring the heat exchange medium to change direction during flow. This improves the flow rate of the heat exchange medium and thus enhances the efficiency of heat exchange.

[0032] In some embodiments, a portion of the first sub-shell protrudes into the mounting space on one side to form the first side beam, and the first sub-flow channel is located inside the first side beam. This allows for better utilization of the space in the first sub-shell, improving space efficiency.

[0033] In some embodiments, the second channel further includes a third sub-channel, which is formed in the second sub-shell. Both the second and third sub-channels extend along the second direction and are interconnected. The thermal management component includes a second thermal management component comprising a plurality of second diversion channels extending along the third direction. A portion of the second diversion channels connects the first sub-channel and the third channel, while another portion connects the third sub-channel and the third channel. This allows the heat exchange medium, which facilitates heat exchange, to be transported more quickly along the third direction between the first, second, and third channels, thereby improving heat exchange efficiency.

[0034] In some embodiments, there are multiple third channels arranged along the first direction. The housing assembly further includes a connector connecting the second housing and the first reinforcing beam. The connector has a connecting channel that connects each of the third channels to the second sub-channel. This connecting channel helps reduce the number of channels in the housing, simplifies the structure, reduces manufacturing difficulty and cost, and makes the housing structure more compact.

[0035] In some embodiments, the pressure relief mechanism of at least a portion of the battery cells is oriented towards the first reinforcing beam along the second direction. Thus, the first reinforcing beam directly guides the emissions ejected from the pressure relief mechanism, while also helping to reduce the impact of the emissions on the housing.

[0036] In some embodiments, there are multiple second reinforcing beams, with at least two second reinforcing beams spaced apart along the second direction and the battery cell assembly sandwiched between two second reinforcing beams. The second reinforcing beams have unused areas on both sides along the first direction. This helps reduce heat exchange between the second reinforcing beams and other components in the battery device, lowering the risk of damage caused by the battery cell assembly transferring heat to other components through the second reinforcing beams, and reducing the overall temperature difference of the battery device.

[0037] In some embodiments, the thermal management assembly includes a cavity with partition ribs connecting its two side walls along a second direction. The first direction intersects the second direction. The partition ribs divide the cavity into at least portions of multiple isolated first channels. The extension direction of the partition ribs is inclined to the first direction. There are multiple partition ribs; some extend in directions intersect with others; some extend perpendicular to the first direction; and others extend to the opposite side. This arrangement of partition ribs with different extension directions reduces deformation along the first direction under pressure from the battery cells, thereby mitigating the adverse effects of deformation of the third channel on the flow of the heat exchange medium.

[0038] In some embodiments, the thermal management component includes a flow plate, the cavity is disposed in the flow plate and extends through the flow plate along the first direction, the partition ribs extend along the first direction, and the flow plate is a one-piece molded structure. This simplifies the manufacturing process of the flow plate, reduces the number of components in the thermal management component, and improves the overall structural strength of the flow plate.

[0039] This application also provides an electrical device, which includes the battery device as described in any of the foregoing embodiments.

[0040] This helps to improve the space utilization of electrical devices, making their structure more compact. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of an embodiment of the present application where the electrical device is a vehicle;

[0042] Figure 2 This is an exploded schematic diagram of a battery device in one embodiment of this application;

[0043] Figure 3 This is a schematic diagram of the first reinforcing beam, the second reinforcing beam, and part of the box body in one embodiment of this application;

[0044] Figure 4 This is a schematic diagram of the first sub-shell in one embodiment of this application;

[0045] Figure 5 This is a schematic diagram of a battery cell assembly, structural adhesive, and thermal management assembly in one embodiment of this application;

[0046] Figure 6 This is an exploded schematic diagram of a single battery cell in one embodiment of this application;

[0047] Figure 7 This is a schematic diagram of the battery device after the cover plate has been removed in one embodiment of this application, viewed from a first perspective.

[0048] Figure 8 for Figure 7 A cross-sectional diagram of position AA in the middle;

[0049] Figure 9 for Figure 8 A magnified view of a portion of position B, where the dashed arrow indicates the flow direction of the heat exchange medium;

[0050] Figure 10 for Figure 8 A partially enlarged schematic diagram of position C, where the dashed arrow indicates the flow direction of the heat exchange medium;

[0051] Figure 11 This is a cross-sectional view of another embodiment of this application, and the cross-section position is... Figure 7 The positions of AA in the text are the same;

[0052] Figure 12 for Figure 7 A schematic diagram of the Chinese embodiment from a second perspective;

[0053] Figure 13 for Figure 12 A cross-sectional view of the DD position in the middle;

[0054] Figure 14 for Figure 12 A cross-sectional view of the EE position;

[0055] Figure 15 This is a schematic diagram of an adapter in one embodiment of this application;

[0056] Figure 16 for Figure 15 A schematic diagram of the position of HH in the middle;

[0057] Figure 17 for Figure 12 A cross-sectional view of the FF position in the middle;

[0058] Figure 18 for Figure 17 A magnified view of the middle I position;

[0059] Figure 19 This is a partially enlarged schematic diagram of another embodiment of this application, the enlarged position of which is the same as... Figure 17 The position of I in the middle is the same;

[0060] Figure 20 for Figure 12 A cross-sectional diagram of the GG position in the middle;

[0061] Figure 21 This is a schematic diagram of a second housing in one embodiment of this application;

[0062] Figure 22 This is a schematic diagram of another second housing in one embodiment of this application;

[0063] Figure 23 This is a schematic diagram of the cover plate in one embodiment of this application;

[0064] Figure 24 for Figure 20 A magnified view of the middle J position;

[0065] Figure 25 This is a schematic diagram of a thermal management component in one embodiment of this application;

[0066] Figure 26 This is an exploded view of the manifold, stop ring, and third sealing ring in one embodiment of this application;

[0067] Figure 27 This is a partial schematic diagram of the manifold, stop ring, and third sealing ring in one embodiment of this application;

[0068] Figure 28 This is an exploded view of the battery cell assembly and structural adhesive in one embodiment of this application.

[0069] Explanation of reference numerals in the attached figures

[0070] 1000, Vehicle; 100, Battery Unit; 200, Controller; 300, Motor; 10, Housing; 10a, Mounting Space; 10aa, Exhaust Channel; 10b, First Space; 10c, Second Space; 11, Housing Assembly; 11a, Fixing Groove; 111, Fixing Protrusion; 12, Side Housing; 121, First Side Beam; 121a, Second Channel; 121aa, First Sub-channel; 121ab, Second Sub-channel Channel; 121ac, Third Sub-channel; 122, Plate; 13, Bottom Wall; 14, First Housing; 141, First Sub-Housing; 142, Second Sub-Housing; 15, Second Housing; 15a, Medium Inlet; 15b, Medium Outlet; 15c, First Positioning Groove; 151, First Positioning Protrusion; 16, Cover Plate; 16a, Mounting Groove; 20, Thermal Management Assembly; 20a, First Channel; 20b, Cavity; 21, First Heat... Management components; 21a, First busbar channel; 21b, Second busbar channel; 21c, First branch channel; 22, Second thermal management component; 22a, Second branch channel; 23, Separator rib; 24, Flow plate; 25, Collector plate; 25a, Stop surface; 251, Second positioning protrusion; 26, Stop ring; 27, Third sealing ring; 30, Battery cell assembly; 31, Battery cell; 311, Pressure relief mechanism; 312. 3121. Outer shell; 3122. First wall; 313. Electrode assembly; 32. Battery cell assembly; 33. Separator assembly; 33a. Mounting cavity; 41. First reinforcing beam; 41a. Third channel; 42. Second reinforcing beam; 42a. Fourth channel; 43. Adapter; 43a. Adapter channel; 43b. Second positioning groove; 44. Connector; 45. Heat insulation pad; 50. Structural adhesive; 60. High voltage control assembly. Detailed Implementation

[0071] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0072] 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 drawings of this application are intended to cover non-exclusive inclusion.

[0073] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" 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.

[0074] 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.

[0075] 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.

[0076] In the description of the embodiments of this application, for ease of explanation, as shown in the accompanying drawings, the direction of arrow X is referred to as the "second direction", the direction of arrow Y as the "third direction", and the direction of arrow Z as the "first direction".

[0077] 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 terms in the embodiments of this application can be understood according to the specific circumstances.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single 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.

[0082] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0083] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0084] In some implementations, the electrode assembly is a stacked structure.

[0085] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0086] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0087] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0088] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0089] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0090] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0091] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0092] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0093] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0094] 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 batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0095] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0096] In some embodiments, a pressure relief mechanism is provided on the casing. The pressure relief mechanism is used to release the internal gas of the battery cell.

[0097] 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.

[0098] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0099] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0100] 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.

[0101] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for venting gas inside the battery cell.

[0102] 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.

[0103] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0104] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0105] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0106] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0107] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0108] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0109] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0110] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0111] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0112] In the following embodiments, for ease of explanation, a vehicle 1000 is used as an example of an electrical device according to an embodiment of this application. The description is as follows with reference to the accompanying drawings.

[0113] 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 vehicles, etc. For example... Figure 1 As shown, a battery device 100 is installed inside the vehicle 1000. The battery device 100 can 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, the battery device 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 device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0114] 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.

[0115] The embodiments of this application will now be described in detail.

[0116] In related technologies, battery devices include individual battery cells and a housing, with both the thermal management components and the individual battery cells located within the housing. The housing is formed by assembling multiple parts. In the event of thermal runaway in an individual battery cell, the emissions released by the cell will exert forces on the various parts of the housing, potentially causing these parts to separate from each other.

[0117] The embodiments of this application aim to provide a battery device in which the orientation of the pressure relief mechanism of the battery cell intersects with the closing direction of the cover plate and housing assembly, so that in the event of thermal runaway of the battery cell, the emissions released by the pressure relief mechanism will not directly impact the cover plate and housing assembly along the closing direction of the cover plate and housing assembly.

[0118] Specifically, see Figures 2 to 9 This application provides a battery device 100, including a housing 10, a thermal management component 20, and a battery cell assembly 30.

[0119] The housing 10 includes a cover plate 16 and a housing assembly 11. The cover plate 16 covers the housing assembly 11 along a first direction and forms an installation space 10a with the housing assembly 11.

[0120] The thermal management component 20 is located within the installation space 10a. The thermal management component 20 is provided with a first channel 20a, which is used to transport the heat exchange medium.

[0121] See Figure 5 and Figure 6 The battery cell assembly 30 includes a battery cell 31, which is located within the installation space 10a. The battery cell 31 includes a housing 312 and an electrode assembly 313 housed within the housing 312. The housing 312 includes multiple walls 3121, including a first wall 3122. The orthographic projection of the electrode assembly 313 onto the first wall 3122 is larger than that onto the other walls 3121. The first wall 3122 is heat-exchangeably connected to the thermal management assembly 20 along a first direction. The orientation of the pressure relief mechanism 311 of the battery cell 31 intersects with the first direction.

[0122] The housing assembly 11 includes a side housing 12 and a bottom wall 13. The bottom wall 13 is disposed opposite to the cover plate 16 along a first direction. The side housing 12 connects the cover plate 16 and the bottom wall 13. The side housing 12 is provided with a second channel 121a, and the first channel 20a communicates with the second channel 121a.

[0123] A portion of the side shell 12 protrudes into the mounting space 10a to form a first side beam 121, and the first side beam 121 encloses and forms a second channel 121a.

[0124] The orthographic projection of the first wall 3122 refers to the projection along the normal to the surface of the first wall 3122.

[0125] The orthographic projection of the first wall 3122 is larger than the orthographic projection of the other walls 3121, so that the area of ​​the outer surface of the first wall 3122 is larger than the area of ​​the outer surface of the other walls 3121. In other words, the outer surface of the first wall 3122 forms the large surface of the battery cell 31.

[0126] The first wall 3122 is heat-exchangeably connected to the thermal management component 20, so that a heat conduction path is formed between the first wall 3122 and the thermal management component 20. Since the outer surface area of ​​the first wall 3122 is large, the heat exchange efficiency between the battery cell 31 and the thermal management component 20 can be improved.

[0127] The heat exchange medium in the first channel 20a of the thermal management component 20 flows continuously to achieve heat exchange with the battery cell 31.

[0128] The heat exchange medium is a fluid medium, and its specific type is not limited, such as water, ethylene glycol, or a mixture of both.

[0129] It is understandable that the pressure relief mechanism 311 is not located on the first wall 3122.

[0130] Understandably, the thermal management component 20 is located on one side of the battery cell 31 along the first direction.

[0131] The second channel 121a is connected to the first channel 20a so that the heat exchange medium can be transported between the second channel 121a and the first channel 20a.

[0132] The first side beam 121 is used to improve the bending and torsional resistance of the side shell 12, thereby improving the overall structural strength of the box 10.

[0133] The first side beam 121 encloses the second channel 121a, meaning that the wall surface of the second channel 121a is the structural surface of the first side beam 121.

[0134] In this embodiment of the battery device 100, the pressure relief mechanism 311 of the battery cell 31 is oriented in an orientation intersecting with the first direction. This ensures that the emissions released by the pressure relief structure in the event of thermal runaway will not directly impact the cover plate 16 and the housing assembly 11 along the first direction, reducing the probability of the sealing performance of the cover plate 16 and the housing assembly 11 deteriorating or even separating due to the impact of the emissions, and reducing the risk of the housing 10 disintegrating in the event of thermal runaway. The thermal management component 20 contacts the battery cell 31 along the first direction, achieving thermal management of the battery cell 31 while also shielding the emissions released by the pressure relief structure, further reducing the risk of the emissions spreading along the first direction and impacting the cover plate 16 and the housing assembly 11. The space inside the side housing 12 is utilized to reduce or even eliminate the risk of thermal runaway. Additional pipes are arranged within the mounting space 10a to facilitate the flow of heat exchange medium between the second channel 121a and the first channel 20a, improving space utilization and reducing the risk of interference between the second channel 121a and other components within the mounting space 10a. The second channel 121a for transporting heat exchange medium is formed directly using the space inside the first side beam 121. The first side beam 121 is a hollow structure, which helps to reduce the weight of the housing 10 and facilitates the lightweighting of the battery device 100. The mounting space 10a can reduce or even eliminate the arrangement of additional pipes for transporting heat exchange medium, so that the space within the mounting space 10a can be used to arrange the battery cells 31 and other components, which helps to reduce the number of components in the battery device 100, making its structure more compact and improving the energy density of the battery device 100.

[0135] The housing assembly 11 serves to protect the components within the mounting space 10a. The mounting space 10a provides space for mounting other components in the battery assembly 100.

[0136] It is understood that there are multiple second channels 121a. Some second channels 121a are used to supply heat exchange medium to the first channel 20a, while others are used to receive heat exchange medium flowing out of the first channel 20a. In other words, the second channels 121a and the first channel 20a together form a flow loop for the heat exchange medium, so that the heat exchange medium continuously enters and exits the first channel 20a and exchanges heat with the battery cell 31.

[0137] In some embodiments, see Figure 3 and Figure 20 The inner wall of the installation space 10a is provided with an exhaust groove 10aa. The exhaust groove 10aa opens into the installation space 10a along a third direction. At least some of the pressure relief mechanisms 311 of the battery cells 31 face the exhaust groove 10aa. The first direction, the second direction and the third direction intersect each other.

[0138] Thus, in the event of thermal runaway of the battery cell 31, the emissions released by the pressure relief mechanism 311 can be guided out of the battery device 100 through the exhaust channel 10aa.

[0139] In some embodiments, see Figure 3 and Figure 20 The first side beam 121 extends along the second direction. There are multiple first side beams 121. The multiple first side beams 121 are spaced apart from each other along the first direction. An exhaust groove 10aa is formed between two adjacent first side beams 121.

[0140] In this way, the space between the first side beams 121 is directly used to form the exhaust groove 10aa, which helps to improve the space utilization rate and makes the structure of the battery device 100 more compact.

[0141] In some embodiments, the first side beam 121 extends along a second direction, and an exhaust groove 10aa is formed between the first side beam 121 and the cover plate 16.

[0142] In this way, the space between the first side beam 121 and the cover plate 16 is directly used to form the exhaust groove 10aa, which helps to improve the space utilization rate and makes the structure of the battery device 100 more compact.

[0143] In some embodiments, an exhaust groove 10aa is formed between the first side beam 121 and the bottom wall 13.

[0144] In this way, the space between the first side beam 121 and the bottom wall 13 is directly used to form the exhaust groove 10aa, which helps to improve the space utilization rate and makes the structure of the battery device 100 more compact.

[0145] In some embodiments, see Figure 2 and Figure 3The battery device 100 also includes a first reinforcing beam 41, which is disposed in the installation space 10a and connected to the housing assembly 11. The first reinforcing beam 41 separates the installation space 10a. Battery cells 31 are disposed on both sides of the first reinforcing beam 41.

[0146] Thus, the first reinforcing beam 41 can strengthen the housing 10, which is beneficial to further improve the structural strength of the housing 10; the first reinforcing beam 41 can suppress the compression of the battery cell 31 by the deformation of the housing 10.

[0147] In some embodiments, see Figure 8 The first reinforcing beam 41 is provided with a third channel 41a, which connects the second channel 121a and the first channel 20a.

[0148] In other words, the second channel 121a, the first channel 20a, and the third channel 41a together form the flow loop of the heat exchange medium.

[0149] Thus, by setting the third channel 41a in the first reinforcing beam 41, it is beneficial to further improve the space utilization rate within the battery device 100. It is also beneficial to make the arrangement of the second channel 121a and the first channel 20a more flexible through the third channel 41a, which in turn facilitates the arrangement of the thermal management component 20, the battery cell 31 and other components within the installation space 10a.

[0150] The number of first reinforcing beams 41 can be one or more.

[0151] The number of third channels 41a can be one or more.

[0152] In some embodiments where there are multiple third channels 41a, a portion of the third channels 41a is used to deliver heat exchange medium to the first channel 20a, and another portion of the third channels 41a is used to receive heat exchange medium flowing out of the first channel 20a.

[0153] In some embodiments, the first reinforcing beam 41 extends along a second direction that intersects with the first direction.

[0154] In some embodiments, the first direction and the second direction are perpendicular to each other.

[0155] In some embodiments, see Figure 2 and Figure 3 The battery device 100 also includes a second reinforcing beam 42, which is disposed in the installation space 10a and connected to the housing assembly 11. The second reinforcing beam 42 separates the installation space 10a. The battery device 100 includes a high-voltage control assembly 60, and the high-voltage control assembly 60 and the battery cell 31 are respectively disposed on opposite sides of the second reinforcing beam 42.

[0156] A high-voltage control component 60 is used to participate in the charging and discharging process of the battery cell assembly. The high-voltage control component 60 may include at least one of a relay, a fuse, and a shunt.

[0157] Thus, the second reinforcing beam 42 can strengthen the housing 10, which is beneficial to further improve the structural strength of the housing 10; the second reinforcing beam 42 separates the high-voltage control assembly 60 and the battery cell 31 so that the two have independent space and suppresses the deformation of the housing 10 from squeezing the high-voltage control assembly 60 and the battery cell 31.

[0158] In some embodiments, see Figure 19 The second reinforcing beam 42 is provided with a fourth channel 42a, which connects the first channel 20a and the second channel 121a.

[0159] In other words, the second channel 121a, the first channel 20a, and the fourth channel 42a together form the flow loop of the heat exchange medium.

[0160] Thus, by setting the fourth channel 42a in the second reinforcing beam 42, it is beneficial to further improve the space utilization rate within the battery device 100. It is also beneficial to make the arrangement of the second channel 121a and the first channel 20a more flexible through the fourth channel 42a, which in turn facilitates the arrangement of the thermal management component 20, the battery cell 31 and other components within the installation space 10a.

[0161] The number of second reinforcing beams 42 can be one or more.

[0162] The number of fourth channels 42a can be one or more.

[0163] In some embodiments, the second reinforcing beam 42 extends along a third direction, which intersects with the first direction.

[0164] In some embodiments, the first direction, the second direction, and the third direction are perpendicular to each other.

[0165] In some embodiments, one of the second direction and the third direction is the length direction of the battery device 100, and the other is the width direction.

[0166] In some embodiments, see Figure 3 The first reinforcing beam 41 is spaced apart from the wall of the installation space 10a on both sides along the third direction.

[0167] This helps to further suppress the bending deformation of the box 10 in the direction perpendicular to the second direction and improve the overall structural strength of the box 10.

[0168] In some embodiments, the first reinforcing beam 41 is located at the middle position of the installation space 10a along a third direction to further improve the overall structural strength of the housing 10.

[0169] In some embodiments, see Figure 3 The second reinforcing beam 42 is spaced apart from the wall of the installation space 10a on both sides along the second direction.

[0170] This helps to further suppress the bending deformation of the box 10 in the direction perpendicular to the third direction and improve the overall structural strength of the box 10.

[0171] In some embodiments, the second reinforcing beam 42 is located at the middle position of the mounting space 10a along the second direction to further improve the overall structural strength of the housing 10.

[0172] In some embodiments, the first reinforcing beam 41 and the second reinforcing beam 42 are connected to further improve the overall structural strength of the box 10.

[0173] In some embodiments, see Figure 3 There are multiple first reinforcing beams 41 and multiple second reinforcing beams 42. Each first reinforcing beam 41 and each second reinforcing beam 42 is spaced apart along the first direction. The second direction, the third direction and the first direction intersect each other.

[0174] This helps to further suppress the bending deformation of the housing 10 in the direction perpendicular to the first direction and improve the overall structural strength of the housing 10.

[0175] In some embodiments, see Figure 3 The first reinforcing beam 41 and the second reinforcing beam 42 are alternately arranged along the first direction to better improve the overall structural strength of the box body 10.

[0176] In some embodiments, see Figure 3 At least a portion of the first reinforcing beam 41, at least a portion of the second reinforcing beam 42, and a portion of the wall of the installation space 10a together form a first space 10b, and at least a portion of the battery cell assembly 30 and at least a portion of the thermal management assembly 20 are located within the first space 10b.

[0177] It is understandable that the first space 10b is part of the installation space 10a.

[0178] Thus, the first reinforcing beam 41, the second reinforcing beam 42, and the wall of the installation space 10a can better protect the battery cell assembly 30 and the thermal management assembly 20, reducing the probability of damage to the battery cell assembly 30 and the thermal management assembly 20 in the event of an impact or other problem; it also facilitates the connection between the third channel 41a and the first channel 20a.

[0179] The number of first space 10b is unlimited; there can be one or more.

[0180] In some embodiments, see Figure 2 , Figure 3 and Figure 8 The battery device 100 also includes a first reinforcing beam 41 and a second reinforcing beam 42 disposed in the installation space 10a. The first reinforcing beam 41 extends along a second direction and connects to the housing assembly 11. The first reinforcing beam 41 divides the installation space 10a. Battery cells 31 and thermal management components 20 are disposed on opposite sides of the first reinforcing beam 41 along a third direction. The second reinforcing beam 42 extends along a third direction and connects to the housing assembly 11. The second reinforcing beam 42 divides the installation space 10a. The battery device 100 includes a high-voltage control component 60. The high-voltage control component 60 and the battery cells 31 are respectively located on opposite sides of the second reinforcing beam 42 along the second direction. The first reinforcing beam 41 is provided with a third channel 41a. The first channel 20a, the second channel 121a and the third channel 41a are connected. The first direction, the second direction and the third direction intersect each other.

[0181] Thus, the cooperation between the first reinforcing beam 41 and the second reinforcing beam 42 helps to further improve the overall structural reduction of the battery device 100, better suppress the adverse effects of the deformation of the housing 10 on the battery cell 31 and the high-voltage control component 60, and achieve the purpose of inputting and outputting heat exchange medium to the thermal management component 20.

[0182] In some embodiments, see Figure 2 and Figure 8 The side shell 12 includes two first shells 14 disposed opposite to each other along a third direction, and two second shells 15 disposed opposite to each other along a second direction. The two ends of the first reinforcing beam 41 are respectively connected to the two second shells 15, and the two ends of the second reinforcing beam 42 are respectively connected to the two first shells 14. The second channel 121a includes a first sub-channel 121aa and a second sub-channel 121ab. At least one of the two first shells 14 forms the first sub-channel 121aa, and at least one of the two second shells 15 forms the second sub-channel 121ab. The first sub-channel 121aa, the second sub-channel 121ab, the first channel 20a, and the third channel 41a are connected.

[0183] Thus, through the first sub-flow channel 121aa in the first housing 14 and the second sub-flow channel 121ab in the second housing 15, the heat exchange medium can flow between the first reinforcing beam 41 and the thermal management component 20, thereby improving the space utilization of the housing 10 structure and making the battery device 100 structure more compact.

[0184] In some embodiments, the first sub-channel 121aa is directly connected to the first channel 20a.

[0185] In some embodiments, see Figure 2 , Figure 3 , Figure 8 and Figure 9 The first housing 14 includes a first sub-housing 141 and a second sub-housing 142 arranged sequentially along a second direction. The first sub-housing 141 and the high-voltage control assembly 60 are arranged opposite each other along a third direction. The first sub-housing 141 forms a first sub-flow channel 121aa. The second reinforcing beam 42 connects to the first sub-housing 141. In the second housing 15, on the same side as the high-voltage control assembly 60 located on the battery cell 31, a plurality of second sub-flow channels 121ab are formed. A portion of the second sub-flow channels 121ab communicates with the first sub-flow channel 121aa, and another portion of the second sub-flow channels 121ab communicates with the third channel 41a.

[0186] In other words, through a portion of the second sub-channel 121ab, the heat exchange medium that has not undergone heat exchange can enter the first channel 20a, and the heat exchange medium that has completed heat exchange in the first channel 20a can enter the other portion of the second sub-channel 121ab.

[0187] This allows the heat exchange medium in the first channel 20a to be continuously renewed, improving heat exchange efficiency.

[0188] Understandably, see Figure 2 and Figure 9 The first sub-channel 121aa and the second sub-channel 121ab are located on the periphery of the space where the high-voltage control component 60 is located, and can also play a role in temperature regulation of the space, which is conducive to the normal operation of the high-voltage control component 60.

[0189] In some embodiments, see Figure 3 and Figure 14 In the second housing 15, on the same side as the high-voltage control component 60 located in the battery cell 31, a medium inlet 15a and a medium outlet 15b are also formed. The medium inlet 15a is connected to the outside of the battery device 100 and the second sub-channel 121ab, and the medium outlet 15b is connected to the third channel 41a and the outside of the battery device 100. The heat exchange medium can flow along a path that sequentially passes through the medium inlet 15a, the second sub-channel 121ab, the first sub-channel 121aa, the first channel 20a, the third channel 41a and the medium outlet 15b.

[0190] Medium inlet 15a is used for external heat exchange medium that has not undergone heat exchange to enter the battery device 100; medium outlet 15b is used for heat exchange medium that has completed heat exchange in the thermal management component 20 to exit the battery device 100.

[0191] In this way, the heat exchange medium can be circulated between the battery device 100 and other external devices, which facilitates the cooling of the heat exchange medium after heat exchange is completed and helps to improve the heat exchange efficiency of the battery cell 31.

[0192] The number of medium inlets 15a is unlimited; there can be one or more.

[0193] The number of media outlets 15b is unlimited; there can be one or more.

[0194] The first sub-flow channel 121aa is provided in the first side beam 121 of the first sub-shell 141.

[0195] The specific number of first side beams 121 provided in the first sub-shell 141 is not limited; it can be one or more.

[0196] In some embodiments, the first sub-shell 141 is provided with a plurality of first side beams 121, and the extension direction of each first side beam 121 is the same. This simplifies the manufacturing process of the first sub-shell 141 and improves production efficiency.

[0197] In some embodiments, see Figure 4 The first sub-shell 141 includes a plate 122, a first side beam 121 is provided on the side of the plate 122 near the mounting space 10a, and at least a portion of the surface of the plate 122 opposite to the first side beam 121 forms the outer surface of the box 10.

[0198] The plate 122 achieves the purpose of shielding the components within the installation space 10a, which is beneficial for enclosing the installation space 10a.

[0199] In some embodiments, the first sub-shell 141 is an integrally formed structure, that is, the first side beam 121 and the plate 122 are different parts of a single part. This helps to simplify the assembly process of the first sub-shell 141 and improve the overall strength of the first sub-shell 141.

[0200] The specific manufacturing method of the first sub-shell 141 is not limited. For example, the first sub-shell 141 and the second channel 121a can be formed by extruding a metal billet. The specific type of metal material used is not limited, such as aluminum alloy.

[0201] In some embodiments, see Figure 8The thermal management component 20 includes a first thermal management component 21, which includes a first bus channel 21a, a second bus channel 21b, and a plurality of first branch channels 21c. The first branch channels 21c extend along a second direction. The first bus channel 21a and the second bus channel 21b both extend along a third direction and are located on one side of the first branch channel 21c along the second direction to communicate with the first branch channel 21c. The first sub-channel 121aa is connected to the first bus channel 21a, and the third channel 41a is connected to the second bus channel 21b. The first bus channel 21a, the second bus channel 21b, and the first branch channels 21c together form the second channel 121a.

[0202] The heat exchange medium flows into each of the first branch channels 21c through one of the first confluence channels 21a and the second confluence channel 21b. The multiple first branch channels 21c expand the area for heat exchange between the heat exchange medium and the battery cells 31. After flowing out of each of the first branch channels 21c, the heat exchange medium re-enters into the other of the first confluence channels 21a and the second confluence channel 21b.

[0203] This facilitates the heat exchange medium to flow along a longer path in the second direction within the first thermal management component 21, enabling it to exchange heat with more battery cells 31 arranged in the second direction and improving the efficiency of heat exchange.

[0204] In some embodiments, see Figure 17 Multiple battery cells 31 are arranged along the second direction to form a first battery cell group 32. The first battery cell group 32 is located on one side of the first thermal management component 21 along the first direction. In the projection plane perpendicular to the first direction, the projection of the first shunt channel 21c passes through the projection of the first battery cell group 32 along the second direction.

[0205] It is understandable that each battery cell 31 in the first battery cell group 32 is in contact with the first thermal management component 21 to form a heat transfer path.

[0206] In this way, the heat exchange medium can exchange heat with each battery cell 31 in the first battery cell group 32 in one go during the straight flow of the heat exchange medium in the second direction, without the need for the heat exchange medium to turn during the flow, which helps to increase the flow rate of the heat exchange medium and thus improve the efficiency of heat exchange.

[0207] It is understandable that the number of first battery cell groups 32 in contact with the first thermal management component 21 can be one or more.

[0208] In some embodiments, there are multiple first battery cell groups 32, and each first battery cell group 32 is arranged perpendicular to a third direction.

[0209] In some embodiments, a portion of the second reinforcing beam 42 is located between two adjacent first side beams 121 and is connected to the side shell.

[0210] In some embodiments, see Figure 3 , Figures 6 to 9 , Figure 11 The second sub-shell 142 is provided with a first side beam 121. The first side beam 121 of the second sub-shell 142 is connected to the first side beam 121 of the first sub-shell 141 along the second direction. The first side beam 121 in the second sub-shell 142 is a solid structure.

[0211] This helps to reduce the size of the first sub-channel 121aa in the first sub-shell 141 and reduce the manufacturing cost of the first sub-shell 141. The first side beam 121 of the first sub-shell 141 and the first side beam 121 of the second sub-shell 142 can work together to better suppress the deformation of the housing 10, so as to reduce the adverse effects of the deformation of the installation space 10a during the use of the battery device 100.

[0212] It is understandable that the first side beam 121 provided in the second sub-shell 142 is configured in a one-to-one correspondence with the first side beam 121 of the first sub-shell 141.

[0213] In some embodiments, see Figure 3 and Figure 4 A portion of the first sub-shell 141 protrudes towards the mounting space 10a to form a first side beam 121, and a first sub-flow channel 121aa is located inside the first side beam 121.

[0214] In this way, the space of the first sub-shell 141 can be better utilized, and the space utilization rate can be improved.

[0215] In some embodiments, the first sub-channel 121aa extends through the first sub-housing 141 along a second direction in order to reduce the probability of the first sub-channel 121aa being formed in the first sub-housing 141.

[0216] In other embodiments, see Figure 11 The second channel also includes a third sub-channel. The second sub-shell forms the third sub-channel. The second sub-channel and the third sub-channel both extend along the second direction and are connected to each other. The thermal management component 20 includes a second thermal management component 22. The second thermal management component 22 includes a second diversion channel 22a. A portion of the second diversion channel connects the first sub-channel and the third channel, and another portion of the second diversion channel connects the third sub-channel and the third channel.

[0217] In this way, the heat exchange medium that facilitates heat exchange can be transported more quickly along the third direction between the first channel 20a, the second channel 121a and the third channel 41a, thereby improving the heat exchange efficiency.

[0218] In some embodiments, a plurality of battery cells 31 are arranged along a second direction to form a second battery cell group 32. The second battery cell group 32 is located on one side of the second thermal management component 22 along a first direction. In a projection plane perpendicular to the first direction, the projection of the second shunt channel 22a passes through the projection of a single battery cell 31 in the second battery cell group 32 along a third direction.

[0219] In this way, the heat exchange medium flowing through the second diversion channel 22a only needs to exchange heat with a single battery cell 31, which helps to improve the thermal management effect of a single battery cell 31.

[0220] In some embodiments, see Figure 3 , Figure 8 , Figures 12 to 14 The number of third channels is multiple, and the multiple third channels are arranged along the first direction. The battery device 100 also includes a converter 43, which has a converter channel 43a that connects each third channel with the second sub-channel.

[0221] The heat exchange medium that has completed the heat exchange flows into the transfer channel 43a and is then discharged from the battery device 100 through the transfer channel 43a.

[0222] Thus, the use of the transfer channel 43a helps to reduce the number of channels provided in the housing 10, which helps to simplify the structure, reduce manufacturing difficulty and cost, and make the structure of the housing 10 more compact.

[0223] In some embodiments, see Figure 3 The adapter 43 is clamped between the first reinforcing beam 41 and the second housing 15 along the second direction to improve the connection stability between the three.

[0224] In some embodiments, see Figure 20 At least some of the battery cells 31 have pressure relief mechanisms 311 that are directed toward the first reinforcing beam 41 in the second direction.

[0225] In this way, the first reinforcing beam 41 directly guides the emissions ejected by the pressure relief mechanism 311, and at the same time, helps to reduce the impact of the emissions on the housing 10.

[0226] In some embodiments, see Figure 3 and Figure 14 The battery device 100 also includes a connector 44, which connects two adjacent first reinforcing beams 41.

[0227] The first reinforcing beams 41 are constrained and fixed to each other by the connector 44, so as to improve the overall structural strength of the battery device 100.

[0228] In some embodiments, the second reinforcing beam 42 connects the connector 44 to the inner wall of the mounting space 10a.

[0229] Thus, the first reinforcing beam 41 and the second reinforcing beam 42 can form a force transmission path with each other through the connector 44, so as to improve the overall structural strength of the battery device 100 and thereby improve the overall structural strength of the battery device 100.

[0230] In some embodiments, see Figure 17 The number of second reinforcing beams 42 is multiple, with at least two second reinforcing beams 42 spaced apart along the second direction and the battery cell assembly 30 sandwiched between two second reinforcing beams 42.

[0231] Thus, the second reinforcing beam 42 can limit the position of the battery cell assembly 30 along the second direction, so that the position of the battery cell assembly 30 within the installation space 10a remains stable.

[0232] Understandably, the battery cell assembly 30 can exchange heat with the second reinforcing beam 42.

[0233] In some embodiments, see Figure 18 The second reinforcing beam 42 has empty areas on both sides along the first direction.

[0234] The vacant area refers to the area on both sides of the second reinforcing beam 42 along the first direction that is not in direct contact with other components in the battery device 100.

[0235] This helps to reduce heat exchange between the second reinforcing beam 42 and other components in the battery device 100, reduces the risk of damage caused by the battery cell assembly 30 transferring heat to other components in the battery device 100 through the second reinforcing beam 42, and helps to reduce the overall temperature difference of the battery device 100.

[0236] In some embodiments, see Figure 18 The battery device 100 also includes a heat insulation pad 45, which is sandwiched between the second reinforcing beam 42 and the battery cell 31 to isolate the second reinforcing beam 42 and the battery cell 31.

[0237] This helps to reduce heat exchange between the battery cell 31 and the second reinforcing beam 42.

[0238] Understandably, the thermal conductivity of the material of the heat insulation pad 45 is lower than that of the material of the second reinforcing beam 42.

[0239] In some embodiments, the material of the heat insulation pad 45 is aerogel.

[0240] In some embodiments, see Figure 4 , Figure 13 and Figure 21 A portion of the components in the housing assembly 11 are provided with a fixing groove 11a, and a portion of the components are provided with a fixing protrusion 111, which is embedded in the fixing groove 11a.

[0241] This allows the housing assembly 11 to be spliced ​​together to form the box 10, which is beneficial to improving assembly efficiency; the wall of the fixing groove 11a is used to limit the fixing protrusion 111, which facilitates the connection between the various channels during the assembly of the box 10.

[0242] In some embodiments, see Figure 4 , Figure 13 A portion of the first side beam 121 forms a fixed protrusion 111. In other words, the first side beam 121 is directly used for assembly and positioning, which helps to simplify the structure of the box body 10.

[0243] In some embodiments, see Figure 10 and Figure 22 The second housing 15 has a first positioning groove 15c on the side surface facing the installation space 10a. The wall of the first positioning groove 15c is provided with a first positioning protrusion 151 protruding along the second direction. The third channel 41a passes through the first reinforcing beam 41. A part of the first reinforcing beam 41 is embedded in the first positioning groove 15c along the second direction. At least a part of the first positioning protrusion 151 is embedded in the third channel 41a to block the third channel 41a.

[0244] In this way, the manufacturing process of the first reinforcing beam 41 can be simplified by methods such as extrusion.

[0245] In some embodiments, a first sealing ring is fitted around the periphery of the first positioning protrusion 151 perpendicular to the second direction to improve sealing performance.

[0246] In some embodiments, see Figure 15 and Figure 16 The adapter 43 is provided with a second positioning groove 43b, and a part of the first reinforcing beam 41 is embedded in the second positioning groove 43b along the second direction to achieve splicing and fixing between the first reinforcing beam 41 and the adapter 43.

[0247] In some embodiments, a second sealing ring is fitted around the periphery of the first reinforcing beam 41 perpendicular to the second direction. The sealing ring is sandwiched between the wall of the first reinforcing beam 41 and the second positioning groove 43b to improve the sealing performance.

[0248] In some embodiments, see Figure 23 The cover plate 16 has a mounting groove 16a on the side facing the mounting space 10a, and at least a portion of the first side beam 121 can be embedded in the mounting groove 16a. In this way, the space utilization of the battery device 100 can be improved.

[0249] In some embodiments, see Figure 5 , Figure 17 and Figure 20 The number of thermal management components 20 is at least two, and the two thermal management components 20 are located on one side of the battery cell 31 along the first direction.

[0250] Thus, the thermal management component 20 can limit the battery cell 31 along the first direction and improve the thermal management efficiency of the battery cell 31.

[0251] In some embodiments, the large surface of the battery cell 31 is attached to the thermal management component 20 to increase the heat exchange area, improve heat exchange efficiency, enhance thermal performance, support higher charge and discharge rates, increase power output, and reduce charging time.

[0252] The large surface of the battery cell 31 refers to the surface with the largest area on the outer surface of the battery cell 31.

[0253] In some embodiments, see Figure 17 and Figure 20 Along the first direction, multiple battery cell modules 30 are arranged, and a thermal management module 20 is provided between two adjacent battery cell modules 30.

[0254] In some embodiments, see Figure 24 The thermal management component 20 is disposed on one side of the battery cell 31 along the first direction. The thermal management component 20 has a cavity 20b and a partition rib 23 in the cavity 20b. The partition rib 23 connects the two side walls of the cavity 20b along the first direction. The partition rib 23 divides the cavity 20b to form at least a portion of a plurality of first channels 20a that are isolated from each other perpendicular to the first direction. The extending direction of the partition rib 23 is inclined to the first direction.

[0255] Thus, the cavity 20b is divided into multiple first channels 20a by the partition rib 23.

[0256] In some embodiments, the partition rib 23 extends along a second direction.

[0257] In some embodiments, see Figure 25 and Figure 26 The thermal management component 20 includes a flow plate 24 and two manifolds 25. A cavity 20b is located in the flow plate 24. A partition rib 23 divides the cavity 20b into a plurality of first diversion channels 21c. The first diversion channels 21c penetrate the flow plate 24 along a second direction. The two manifolds 25 are located on one side of the two sides of the flow plate 24 along the second direction. The first confluence channel 21a is located in one manifold 25, and the second confluence channel 21b is located in the other manifold 25.

[0258] In some embodiments, see Figure 26 and Figure 27 A portion of the manifold 25 protrudes along a third direction to form a second positioning protrusion 251. The thermal management assembly 20 also includes a stop ring 26 and a third sealing ring 27. One end of the first manifold channel 21a or the second manifold channel 21b is opened at the second positioning protrusion 251. The second positioning protrusion 251 has a stop surface 25a on its periphery perpendicular to the third direction. The third sealing ring 27 is sandwiched between the stop ring 26 and the stop surface 25a. At least a portion of the second positioning protrusion 251, the stop ring 26, and the third sealing ring 27 can be embedded in the second channel 121a to achieve communication between the first manifold channel 21a or the second manifold channel 21b and the second channel 121a.

[0259] Thus, the stop ring 26 and the stop surface 25a can limit the third sealing ring 27 in the third direction, reducing the risk of the third sealing ring 27 coming off during the assembly of the housing assembly 11.

[0260] In some embodiments, see Figure 24 There are multiple partition ribs 23. The extension direction of some partition ribs 23 intersects the extension direction of other partition ribs 23, and some extend to one side in a direction perpendicular to the first direction, while others extend to the other side.

[0261] Thus, the separation ribs 23 with different extension directions can reduce the deformation of the separation ribs 23 along the first direction under the compression of the battery cell 31, thereby reducing the adverse effect of the deformation of the third channel 41a on the flow of the heat exchange medium.

[0262] In some embodiments, see Figure 24 Two adjacent partition ribs 23 are connected at one end along the first direction, and spaced apart at the other end. This further reduces the deformation of the partition ribs 23 along the first direction, and reduces the adverse effects of the deformation of the third channel 41a on the flow of the heat exchange medium.

[0263] In other words, the various dividing ribs together form a roughly W-shaped structure.

[0264] In some embodiments, the cavity 20b is further provided with a reinforcing rib, which connects the partition rib 23 to one side wall of the cavity 20b along the first direction. The partition rib 23 extends to one side in a direction perpendicular to the first direction and the reinforcing rib extends to the other side.

[0265] Thus, the reinforcing ribs can strengthen the connecting ribs and reduce the deformation of the separating ribs 23 along the first direction under the pressure of the battery cell 31, thereby reducing the adverse effects of the deformation of the third channel 41a on the flow of the heat exchange medium.

[0266] In some embodiments, the thermal management component 20 includes a flow plate 24, a cavity 20b disposed on the thermal management plate and extending through the flow plate 24 in a second direction, a partition rib 23 extending in the second direction, and the flow plate 24 being an integrally formed structure.

[0267] This simplifies the manufacturing process of the flow plate 24, reduces the number of parts in the thermal management assembly 20, and improves the overall structural strength of the flow plate 24.

[0268] In some embodiments, the first direction is the direction of gravity.

[0269] In some embodiments, two adjacent battery cells 31 are bonded together with structural adhesive 50 for fixation.

[0270] In some embodiments, the housing assembly 11 is made of aluminum alloy so that it can be formed by extrusion, and the openings and slots can be manufactured by machining.

[0271] First, install the bottom shell and reinforcing beam assembly, then install the first layer of thermal management assembly 20 and structural adhesive 50, lay a layer of battery cell assembly 30 flat, then install the second layer of thermal management assembly 20 and structural adhesive 50, lay a layer of battery cell assembly 30 flat, and so on.

[0272] In some embodiments, see Figure 5 and Figure 24 A structural adhesive 50 is provided between the battery cell assembly 30 and the thermal management assembly 20 to bond the two together and fix their relative positions.

[0273] In some embodiments, see Figure 28 The battery cell assembly 30 also includes a separator assembly 33, which has a plurality of mounting cavities 33a. The battery cell 31 is located in the mounting cavity 33a. The mounting cavity 33a is open on at least one side along the first direction. The thermal management assembly 20 is covered at the open position of the mounting cavity 33a along the first direction.

[0274] In this way, the individual battery cells 31 are isolated from each other by the separator 33, reducing the heat exchange between the individual battery cells 31.

[0275] The specific material of the separator 33 is not limited, such as aerogel, in order to reduce the thermal conductivity of the separator 33 itself and further reduce the heat exchange between the individual battery cells 31.

[0276] The housing assembly 11 is made of metal and is fixed together by welding. The metal material used can be aluminum alloy.

[0277] A specific embodiment of this application is as follows:

[0278] A battery device 100 includes a housing 10, a thermal management component 20, and a battery cell assembly 30. The housing 10 includes a cover plate 16 and a housing assembly 11. The cover plate 16 covers the housing assembly 11 along a first direction and forms an installation space 10a with the housing assembly 11. The thermal management component 20 is located within the installation space 10a and has a first channel 20a for conveying a heat exchange medium. The battery cell assembly 30 includes a battery cell 31. The battery cell assembly 30 is located within the installation space 10a. The battery cell 31 includes a housing 312 and an electrode assembly 313 housed within the housing 312. The housing 312 includes multiple walls 3121, including a first wall 3122. The orthographic projection of the electrode assembly 313 onto the first wall 3122 is larger than that onto the other walls 3121. The first wall 3122 is heat-exchangeably connected to the thermal management component 20 along the first direction. The orientation of the pressure relief mechanism 311 of the battery cell 31 intersects with the first direction. The housing assembly 11 includes a side housing 12 and a bottom wall 13. The bottom wall 13 is disposed opposite to the cover plate 16 along a first direction. The side housing 12 connects the cover plate 16 and the bottom wall 13. The side housing 12 is provided with a second channel 121a, and the first channel 20a communicates with the second channel 121a. A portion of the side shell 12 protrudes towards the mounting space 10a to form a first side beam 121; the first side beam 121 encloses to form a second channel 121a; the first side beam 121 extends along a second direction, and there are multiple first side beams 121, which are spaced apart from each other along a first direction, and an exhaust groove 10aa is formed between two adjacent first side beams 121; and / or, an exhaust groove 10aa is formed between the first side beam 121 and the cover plate 16; and / or, an exhaust groove 10aa is formed between the first side beam 121 and the bottom wall 13; the exhaust groove 10aa opens into the mounting space 10a along a third direction, and the pressure relief mechanism 311 of at least a portion of the battery cell 31 faces the exhaust groove 10aa, and the first direction, the second direction, and the third direction intersect each other. The battery device 100 also includes a first reinforcing beam 41 and a second reinforcing beam 42 disposed in the installation space 10a; the first reinforcing beam 41 extends along a second direction and connects to the housing assembly 11, the first reinforcing beam 41 divides the installation space 10a, and battery cells 31 and thermal management components 20 are disposed on opposite sides of the first reinforcing beam 41 along a third direction; the second reinforcing beam 42 extends along a third direction and connects to the housing assembly 11, the second reinforcing beam 42 divides the installation space 10a, the battery device 100 includes a high-voltage control component 60, and the high-voltage control component 60 and battery cells 31 are respectively located on opposite sides of the second reinforcing beam 42 along the second direction; the first reinforcing beam 41 is provided with a third channel 41a, and the first channel 20a, the second channel 121a and the third channel 41a are connected; the first direction, the second direction and the third direction intersect each other.The side shell 12 includes two first shells 14 disposed opposite each other along a third direction, and two second shells 15 disposed opposite each other along a second direction. The two ends of the first reinforcing beam 41 are respectively connected to the two second shells 15, and the two ends of the second reinforcing beam 42 are respectively connected to the two first shells 14. The second channel 121a includes a first sub-channel 121aa and a second sub-channel 121ab. At least one of the two first shells 14 forms the first sub-channel 121aa, and at least one of the two second shells 15 forms the second sub-channel 121ab. The first sub-channel 121aa, the second sub-channel 121ab, the first channel 20a, and the third channel 41a are connected. The first housing 14 includes a first sub-housing 141 and a second sub-housing 142 arranged sequentially along a second direction. The first sub-housing 141 and the high-voltage control assembly 60 are arranged opposite each other along a third direction. The first sub-housing 141 forms a first sub-flow channel 121aa. The second reinforcing beam 42 connects to the first sub-housing 141. In the second housing 15, one of the sub-housing units located on the same side as the high-voltage control assembly 60 on the battery cell 31 forms a plurality of second sub-flow channels 121ab. A portion of the second sub-flow channels 121ab communicates with the first sub-flow channel 121aa, and another portion of the second sub-flow channels 121ab communicates with the third channel 41a. In the second housing 15, on the same side as the high-voltage control assembly 60 located in the battery cell 31, a medium inlet 15a and a medium outlet 15b are also formed. The medium inlet 15a is connected to the outside of the battery device 100 and the second sub-channel 121ab, and the medium outlet 15b is connected to the third channel 41a and the outside of the battery device 100. The heat exchange medium can flow along a path that sequentially passes through the medium inlet 15a, the second sub-channel 121ab, the first sub-channel 121aa, the first channel 20a, the third channel 41a and the medium outlet 15b. The thermal management component 20 includes a first thermal management component 21. The first thermal management component 21 includes a first bus channel 21a, a second bus channel 21b, and a plurality of first branch channels 21c. The first branch channels 21c extend along a second direction. The first bus channel 21a and the second bus channel 21b both extend along a third direction and are located on both sides of the first branch channel 21c along the first direction and are connected to the first branch channel 21c. The first sub-channel 121aa is connected to the first bus channel 21a, and the third channel 41a is connected to the second bus channel 21b. The first bus channel 21a, the second bus channel 21b, and the first branch channels 21c together form the second channel 121a. Multiple battery cells 31 are arranged along the second direction to form a first battery cell group 32. The first battery cell group 32 is located on one side of the first thermal management component 21 and the thermal management component 20 along the first direction. In the projection plane perpendicular to the first direction, the projection of the first shunt channel 21c passes through the projection of the first battery cell group 32 along the second direction.A portion of the first sub-shell 141 protrudes towards the mounting space 10a to form a first side beam 121, and a first sub-flow channel 121aa is located inside the first side beam 121. Multiple third channels 41a are arranged along a first direction. The shell assembly 11 also includes a connector 43 connecting the second shell 15 and the first reinforcing beam 41. The connector 43 has a connector channel 43a that connects each third channel 41a to the second sub-flow channel 121ab. At least a portion of the battery cells 31 have a pressure relief mechanism 311 facing the first reinforcing beam 41 along a second direction. Multiple second reinforcing beams 42 are present, with at least two second reinforcing beams 42 spaced apart along the second direction and the battery cell assembly 30 sandwiched between the two second reinforcing beams 42. Both sides of the second reinforcing beams 42 along the first direction have empty areas. The thermal management assembly 20 includes a cavity 20b, within which are partition ribs 23. The partition ribs 23 connect the two side walls of the cavity 20b along a second direction, where the first and second directions intersect. The partition ribs 23 divide the cavity 20b, forming at least a portion of multiple isolated first channels 20a. The extension direction of the partition ribs 23 is inclined to the first direction. There are multiple partition ribs 23; the extension directions of some partition ribs 23 intersect with the extension directions of others; some partition ribs 23 extend towards one side perpendicular to the first direction, while others extend towards the other side. The thermal management assembly 20 includes a flow plate 24. The cavity 20b is disposed on the flow plate 24 and extends through the flow plate 24 along the first direction. The partition ribs 23 extend along the first direction. The flow plate 24 is an integrally formed structure.

[0279] This application also provides an electrical device, which includes a battery device 100 as described in any of the foregoing embodiments.

[0280] This helps to improve the space utilization of electrical devices, making their structure more compact.

[0281] The various embodiments / implementations provided in this application can be combined with each other without creating contradictions.

[0282] The above are merely preferred embodiments of this application and are not intended to limit the embodiments in this application. For those skilled in the art, the embodiments of this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A battery device, characterized in that, include: The housing includes a cover plate and a housing assembly, wherein the cover plate is disposed on the housing assembly along a first direction and forms an installation space with the housing assembly; A thermal management component is located within the installation space. The thermal management component is provided with a first channel for conveying a heat exchange medium. A battery cell assembly includes a battery cell located within the mounting space. The battery cell includes a housing and an electrode assembly housed within the housing. The housing includes multiple walls, including a first wall. The orthographic projection of the electrode assembly onto the first wall is larger than that onto the other walls. The first wall is heat-exchangeably connected to the thermal management assembly along the first direction, and the orientation of the pressure relief mechanism of the battery cell intersects with the first direction; The housing assembly includes a side housing and a bottom wall. The bottom wall is disposed opposite to the cover plate along the first direction. The side housing connects the cover plate and the bottom wall. The side housing is provided with a second channel. The first channel communicates with the second channel. A portion of the side housing protrudes into the installation space from the side facing the installation space to form a first side beam. The first side beam surrounds the second channel. The first side beam extends along a second direction, and there are multiple first side beams. The multiple first side beams are spaced apart from each other along a first direction, and an exhaust groove is formed between two adjacent first side beams; and / or, an exhaust groove is formed between the first side beam and the cover plate; and / or an exhaust groove is formed between the first side beam and the bottom wall. The venting channel opens into the installation space along a third direction, and at least a portion of the pressure relief mechanism of the battery cell faces the venting channel. The first direction, the second direction, and the third direction intersect each other.

2. The battery device according to claim 1, characterized in that, The battery device further includes a first reinforcing beam, which is disposed in the mounting space and connected to the housing assembly, and the first reinforcing beam separates the mounting space; the battery cells are disposed on both sides of the first reinforcing beam.

3. The battery device according to claim 2, characterized in that, The first reinforcing beam is provided with a third channel, which connects the first channel and the second channel.

4. The battery device according to claim 1, characterized in that, The battery device further includes a second reinforcing beam, which is disposed in the mounting space and connected to the housing assembly, and the second reinforcing beam separates the mounting space; the battery device includes a high-voltage control assembly, and the high-voltage control assembly and the battery cells are respectively disposed on opposite sides of the second reinforcing beam.

5. The battery device according to claim 4, characterized in that, The second reinforcing beam is provided with a fourth channel, which connects the first channel and the second channel.

6. The battery device according to claim 1, characterized in that, The battery device further includes a first reinforcing beam and a second reinforcing beam disposed in the installation space; The first reinforcing beam extends along the second direction and connects to the housing assembly. The first reinforcing beam separates the installation space. Battery cells and thermal management components are provided on opposite sides of the first reinforcing beam along the third direction. The second reinforcing beam extends along the third direction and connects to the housing assembly. The second reinforcing beam separates the installation space. The battery device includes a high-voltage control assembly, and the high-voltage control assembly and the battery cells are located on opposite sides of the second reinforcing beam along the second direction. The first reinforcing beam is provided with a third channel, and the first channel, the second channel and the third channel are connected; the first direction, the second direction and the third direction intersect each other.

7. The battery device according to claim 6, characterized in that, The side shell includes two first shells arranged opposite each other along the third direction and two second shells arranged opposite each other along the second direction. The two ends of the first reinforcing beam are respectively connected to the two second shells, and the two ends of the second reinforcing beam are respectively connected to the two first shells. The second channel includes a first sub-channel and a second sub-channel. At least one of the two first housings forms the first sub-channel, and at least one of the two second housings forms the second sub-channel. The first sub-channel, the second sub-channel, the first channel, and the third channel are connected to each other.

8. The battery device according to claim 7, characterized in that, The first housing includes a first sub-housing and a second sub-housing arranged sequentially along the second direction. The first sub-housing is arranged opposite to the high-voltage control assembly along the third direction. The first sub-housing forms a first sub-flow channel. The second reinforcing beam connects to the first sub-housing. In the second housing, on the same side as the high-voltage control component located in the battery cell, a plurality of second sub-channels are formed. A portion of the second sub-channels are connected to the first sub-channel, and another portion of the second sub-channels are connected to the third channel.

9. The battery device according to claim 8, characterized in that, The second housing, located on the same side as the high-voltage control component of the battery cell, also has a medium inlet and a medium outlet. The medium inlet connects the outside of the battery device to the second sub-channel, and the medium outlet connects the third channel to the outside of the battery device. The heat exchange medium can flow along a path that passes sequentially through the medium inlet, the second sub-channel, the first sub-channel, the first channel, the third channel, and the medium outlet.

10. The battery device according to claim 8, characterized in that, The thermal management component includes a first thermal management component, which includes a first confluence channel, a second confluence channel, and a plurality of first branch channels. The first branch channels extend along the second direction. The first confluence channel and the second confluence channel both extend along the third direction and are located on both sides of the first branch channel along the first direction and are connected to the first branch channel. The first sub-channel is connected to the first confluence channel, and the third channel is connected to the second confluence channel. The first confluence channel, the second confluence channel, and the first branch channels together form the second channel.

11. The battery device according to claim 10, characterized in that, Multiple battery cells are arranged along the second direction to form a first battery cell group. The first battery cell group is located on one side of the first thermal management component along the first direction. In a projection plane perpendicular to the first direction, the projection of the first shunt channel passes through the projection of the first battery cell group along the second direction.

12. The battery device according to claim 8, characterized in that, A portion of the first sub-shell protrudes into the mounting space on one side to form the first side beam, and the first sub-flow channel is located inside the first side beam.

13. The battery device according to claim 8, characterized in that, The second channel further includes a third sub-channel, which is formed in the second sub-housing. The second sub-channel and the third sub-channel both extend along the second direction and are interconnected. The thermal management component includes a second thermal management component, which includes a plurality of second diversion channels. The second diversion channels extend along the third direction. A portion of the second diversion channels connects the first sub-channel and the third channel, and another portion of the second diversion channels connects the third sub-channel and the third channel.

14. The battery device according to claim 8, characterized in that, The number of the third channels is multiple, and the multiple third channels are arranged along the first direction. The housing assembly also includes a connector, which connects the second housing and the first reinforcing beam. The connector has a connector channel that connects each of the third channels and the second sub-channel.

15. The battery device according to claim 6, characterized in that, The pressure relief mechanism of at least a portion of the battery cells is oriented toward the first reinforcing beam in the second direction.

16. The battery device according to claim 6, characterized in that, The number of the second reinforcing beams is multiple, with at least two second reinforcing beams spaced apart along the second direction and the battery cell assembly sandwiched between the two second reinforcing beams. The second reinforcing beams have empty areas on both sides along the first direction.

17. The battery device according to claim 1, characterized in that, The thermal management assembly has a cavity with partition ribs. The partition ribs connect the two side walls of the cavity along a second direction. The first direction intersects the second direction. The partition ribs divide the cavity to form at least a portion of a plurality of isolated first channels. The extension direction of the partition ribs is inclined to the first direction. There are a plurality of partition ribs. The extension directions of some partition ribs intersect the extension directions of others. Some partition ribs extend to one side in a direction perpendicular to the first direction, and others extend to the other side.

18. The battery device according to claim 17, characterized in that, The thermal management component includes a flow plate, the cavity is disposed in the flow plate and extends through the flow plate along the first direction, the partition rib extends along the first direction, and the flow plate is an integrally formed structure.

19. An electrical appliance, characterized in that, The electrical device includes the battery device as described in any one of claims 1-18.

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