Battery device and electric appliance

Abstract

The application discloses a battery device and an electric equipment. The battery device comprises a frame, a cover body, a bottom plate, a battery cell assembly and a support assembly. The frame has a first opening and a second opening which are located at two sides of a first direction and are communicated with each other. The cover body is connected to the frame and closes the first opening. The bottom plate is connected to the frame and closes the second opening. The frame, the cover body and the bottom plate jointly define an accommodation space. The battery cell assembly is accommodated in the accommodation space and comprises a plurality of battery cells arranged along a second direction. The battery cell comprises a pressure relief mechanism arranged on a first wall of the battery cell. The second direction is perpendicular to the first direction. The support assembly is accommodated in the accommodation space and connected to the frame. The first wall of each battery cell is partially arranged on a surface of the support assembly away from the bottom plate to form a spacing space between the first wall and the bottom plate. The pressure relief mechanism of each battery cell is arranged opposite to the spacing space. The battery device and the electric equipment can improve the reliability of the battery device.

Description

Technical Field

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

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

[0003] In battery technology, the structural and mechanical properties of battery devices are crucial, directly affecting their reliability and lifespan. Therefore, improving battery device performance is a pressing technical challenge. Utility Model Content

[0004] This application provides a battery device and an electrical appliance that can improve the reliability of the battery device.

[0005] In a first aspect, this application provides a system comprising: a frame, a cover, a base plate, a battery cell assembly, and a support assembly, wherein the frame has a first opening and a second opening on both sides along a first direction, the first opening and the second opening being interconnected; the cover is connected to the frame and closes the first opening; the base plate is connected to the frame and closes the second opening, the frame, the cover, and the base plate together defining an accommodating space; the battery cell assembly is accommodated in the accommodating space, the battery cell assembly comprising a plurality of battery cells arranged along a second direction, each battery cell including a pressure relief mechanism disposed on a first wall of the battery cell, the second direction being perpendicular to the first direction; the support assembly is accommodated in the accommodating space, the support assembly being connected to the frame, a portion of the first wall of each battery cell resting on the surface of the support assembly away from the base plate to form a gap space between the first wall and the base plate, the pressure relief mechanism of each battery cell being disposed opposite to the gap space.

[0006] In the technical solution of this application embodiment, on the one hand, the pressure relief mechanism is set on the first wall and directly facing the interval space, so that the side of the pressure relief mechanism facing the bottom plate is unobstructed from the bottom plate. In the event of thermal runaway, high-temperature gases and other emissions can be quickly discharged into the interval space, thereby reducing the risk of emissions spreading to the surroundings and affecting adjacent battery cells, and improving the overall reliability of the battery device. Furthermore, the first wall of the battery cell is supported by the support assembly, which can elevate the battery cell. The interval space can directly serve as a pressure relief channel, eliminating the need for additional discharge pipes, thereby increasing the discharge speed and simplifying the internal structure of the battery device. On the other hand, since the frame has good structural strength, the support assembly is connected to the frame, and the first wall of the battery cell is supported by the support assembly, which can improve the support strength of the support assembly for the battery cell. Moreover, the interval space can absorb some of the deformation of the bottom plate when impacted, thereby reducing the risk of damage or even failure of the battery cell due to impact, improving the overall impact resistance of the battery device. At the same time, the combination of the support assembly and the frame can simplify the structure of the battery device and improve its lightweight nature.

[0007] In some embodiments of the first aspect, the support assembly includes a first support member connected to the side of the frame near the battery cell, with a first wall portion of the battery cell resting on the surface of the first sub-support member away from the base plate.

[0008] In the technical solution of this application embodiment, the first support member is located on the side of the frame facing the battery cell, forming an inwardly extending support platform. This provides a mounting surface for the battery cell assembly, thereby dispersing the load pressure on the frame, preventing excessive local stress on the frame, and improving the overall structure's resistance to deformation and mechanical strength. Furthermore, as a load-bearing platform, the first support member further reduces the support height of the frame on the battery cell assembly, improving the space utilization rate inside the battery device.

[0009] In some embodiments of the first aspect, the first support member and the frame are integrally formed.

[0010] In the technical solution of this application embodiment, the first support member is integrally formed with the frame, thereby improving the support strength of the support component and improving the structural stability of the battery device.

[0011] In some embodiments of the first aspect, the battery device includes a plurality of battery cell assemblies arranged along a third direction; the support assembly also includes a plurality of second supports extending along the second direction, the plurality of second supports being spaced apart along the third direction, the plurality of second supports being respectively connected to the frame, and a first wall portion of the battery cell resting on the surface of the second support away from the base plate; the third direction is perpendicular to the first direction and the second direction.

[0012] In the technical solution of this application embodiment, by setting a second support member to support multiple battery cells in a multi-cell battery assembly, part of the gravitational load of the first support member can be unloaded, reducing the risk of deformation caused by local stress concentration in the first support member and improving the structural stability of the battery device. Furthermore, since the frame has good structural strength, the connection between the second support member and the frame can enhance the supporting effect of the second support member on the battery cells, improving the stability of the battery device. In addition, the spaced arrangement of the first support members can reduce the weight of the entire battery device, improving its lightweight design.

[0013] In some embodiments of the first aspect, the second support includes at least one first sub-support, the first sub-support being connected to the frame at both ends along the second direction, the first sub-support being spaced apart from the frame on both sides along the third direction, and the first walls of the battery cells of two adjacent battery cell assemblies along the third direction abutting against the same first sub-support.

[0014] In the technical solution of this application embodiment, the first sub-support member supports the first walls of two adjacent battery cells facing upwards, which can raise the battery cells and increase the space between the first wall of the battery cell and the base plate, thereby increasing the emission rate of emissions. Furthermore, the two ends of the first sub-support member along the second direction are connected to the frame, which can unload part of the gravity load of the first support member, reduce the risk of deformation caused by local stress concentration, and improve the structural stability of the battery device. In addition, the first walls of two adjacent battery cells abut against the same first sub-support member, so that the first sub-support member can connect two adjacent battery cells, improving the structural stability of the grouped battery cells.

[0015] In some embodiments of the first aspect, the second support member further includes two second sub-support members, which are respectively located on the outermost side of the plurality of first sub-support members along the third direction and abut against the first wall of the battery cell of the battery cell assembly located on the outermost side of the third direction. The two second sub-support members are respectively mounted on the surface of the first support member away from the base plate and are respectively connected to the first support member.

[0016] In the technical solution of this application embodiment, the two second sub-support members can further elevate the outermost battery cell from the third direction, thereby increasing the space between the first wall of the battery cell and the bottom plate, and increasing the emission rate of the emissions. Furthermore, the connection between the second sub-support members and the first support member enhances the support for the battery cell and improves the support performance of the battery device.

[0017] In some embodiments of the first aspect, in the second direction and / or the third direction, the adjacent walls of two adjacent battery cells are bonded together.

[0018] In the technical solution of this application embodiment, the first walls of two adjacent battery cells along the second direction and / or the third direction are bonded to each other, that is, the two adjacent battery cells are closely abutting each other, which can improve the stability of the battery cells, reduce the waste of space inside the battery device, and improve the energy density of the battery device.

[0019] In some embodiments of the first aspect, the second support member is connected to the first support member by adhesive bonding or by a connector; and / or the support assembly is connected to the battery cell assembly by adhesive bonding.

[0020] In the technical solution of this application embodiment, by bonding the support component to the battery cell assembly, the shaking of the battery cell can be reduced, and the stability of the battery device can be improved. The second support component is bonded to the first support component or connected through a connector. The first support component can provide certain support for the second support component, improving the supporting effect of the second support component on the battery cell. The second support component can unload part of the load on the first support component, reducing the risk of deformation caused by local stress concentration in the first support component, and improving the structural stability of the battery device.

[0021] In some embodiments of the first aspect, the interior of the second support member has a flow channel through which a heat exchange medium passes to regulate the temperature of the battery cell assembly.

[0022] In the technical solution of this application embodiment, the second support member has internal flow channels, which can support the battery cells while also regulating their temperature. If the battery cell temperature is too high or too low, it can dissipate heat or cool the battery cell, reducing the risk of battery cell failure and thus improving the overall performance of the battery device. Furthermore, the internal flow channels of the second support member, meaning the second support member has a hollow structure, make it more resistant to tension and able to unload the expansion force of the battery cell along its length, reducing the risk of battery cell failure due to compression caused by expansion.

[0023] In some embodiments of the first aspect, the second support member further has a mounting cavity that is isolated from the flow channel, and the second support member and the first support member are connected by a connector passing through the mounting cavity.

[0024] In the technical solution of this application embodiment, by setting an installation cavity, the interior of the installation cavity is hollow and isolated from the flow channel, which can reduce the risk of the connector puncturing the flow channel and causing the heat exchange medium to leak. At the same time, it can further reduce the weight of the second support member and improve the overall lightweighting of the battery device.

[0025] In some embodiments of the first aspect, the battery device further includes a limiting member extending along the second direction, the limiting member being received in the receiving space, the limiting member abutting against a second wall of at least a portion of the battery cells of the battery cell assembly, wherein the limiting member is connected to the frame, and the second wall is perpendicular to the first wall.

[0026] In the technical solution of this application embodiment, the limiting member extends along the second direction, thereby abutting against one or more battery cells to form a physical block on one or more battery cells, thereby restricting their movement, reducing the movement of battery cells during vibration, impact or charge / discharge expansion, reducing the risk of structural deformation or failure caused by battery cell displacement, and improving the structural stability and reliability of the battery device.

[0027] In some embodiments of the first aspect, the battery device includes a plurality of battery cell assemblies arranged along the third direction and a plurality of limiting members arranged along the third direction; two of the plurality of limiting members are respectively located on the outermost side of the plurality of battery cell assemblies in the third direction, and respectively abut against the outermost second wall of the battery cell of the two outermost battery cell assemblies in the third direction, and in the third direction, the adjacent second walls of the battery cells of two adjacent battery cell assemblies abut against the same limiting member.

[0028] In the technical solution of this application embodiment, limiting members are provided on the second wall of each of the multiple battery cells in the multiple battery cell assembly. The multiple limiting members can abut against each row of battery cells, so that the battery cells have good stability, thereby further improving the overall structural stability of the battery device.

[0029] In some embodiments of the first aspect, the limiting member and the support assembly, whose projections in the first direction have overlapping portions, are interconnected.

[0030] In the technical solution of this application embodiment, by connecting the limiting member with its corresponding support component, on the one hand, the movement of the battery cell can be restricted in two different directions, ensuring that the battery cell maintains a precise position during use or assembly, reducing the risk of battery cell failure caused by displacement due to impact or compression; on the other hand, the two are connected to form a whole, which can further disperse the stress generated by external impact on the battery cell, reduce the risk of battery cell deformation or even failure due to external force, and improve the overall rigidity of the battery device.

[0031] In some embodiments of the first aspect, the limiting member extends along the first direction, in which the ratio K1 of the height of the limiting member to the height of the battery cell is in the range of 0.5 ≤ K1 ≤ 1.

[0032] In the technical solution of this application embodiment, the ratio K1 of the height of the limiting member to the height of the battery cell is set to be greater than or equal to 0.5, so that the limiting member has sufficient area to abut against the battery cell, which can improve the stability of the battery cell; the ratio K1 of the height of the limiting member to the height of the battery cell is set to be less than or equal to 1, which improves the stability of the battery cell while avoiding excessive space occupation inside the battery device due to the limiting member being too high, thereby improving the energy density of the battery device.

[0033] In some embodiments of the first aspect, the limiting member has an internal channel for a heat exchange medium to pass through, the heat exchange medium being used to regulate the temperature of the battery cell assembly.

[0034] In the technical solution of this application embodiment, a flow channel is provided inside the limiting member, which can restrict the movement of the battery cells while also regulating the temperature of the battery cells. When the temperature of the battery cells is too high or too low, heat dissipation or cooling is provided, reducing the risk of battery cell failure and thus improving the overall performance of the battery device. Furthermore, the flow channel inside the limiting member, i.e., the limiting member is a hollow structure, makes it more resistant to tension and can unload the expansion force of the battery cells in their length direction, reducing the risk of battery cell failure due to compression caused by expansion. In addition, integrating the temperature regulation function into the limiting member can save space for a separate temperature regulation system, making the battery device more compact and improving its performance.

[0035] In some embodiments of the first aspect, the limiting member is adhesively connected to the frame; and / or the limiting member is adhesively connected to the battery cell assembly.

[0036] In the technical solution of this application embodiment, the limiting member is bonded to the battery cell, which can further reduce the shaking of the battery cell and improve the stability of the battery device. The limiting member is bonded to the frame or connected through a connector, and the frame can provide certain support for the limiting member, thereby further improving the fixing effect of the limiting member on the battery cell.

[0037] In some embodiments of the first aspect, the limiting member is at least partially located between the frame and the battery cell assembly adjacent to the frame, and the top of the limiting member along the first direction is higher than the top of the portion of the frame adjacent to the limiting member along the first direction.

[0038] In the technical solution of this application embodiment, the top of the limiting member is higher than the top of the frame. When a battery cell is impacted or squeezed, the portion of the limiting member extending beyond the frame in the first direction can replace the frame, restricting the displacement of the battery cell. Simultaneously, the limiting member can buffer the squeezed battery cell, unloading the squeezing force and reducing the risk of battery cell failure due to squeezing deformation. Furthermore, the lower frame height reduces the frame's weight, thereby reducing the overall weight of the battery device and simplifying manufacturing.

[0039] In some embodiments of the first aspect, in the first direction, the ratio K2 of the height of the limiting member to the height of the frame is in the range of 1.25≤K2≤5.

[0040] In the technical solution of this application embodiment, on the one hand, the limiting member is relatively high compared to the frame, which can replace the function of the side beam of the frame, restrict the displacement of the battery cell, and reduce the risk of poor contact or open circuit failure caused by the movement of the battery cell leading to the detachment or breakage of the internal connector of the battery device. In addition, the limiting member is not too high, so as to avoid occupying too much space inside the battery device, thereby improving the energy density of the battery device. On the other hand, the frame is relatively low compared to the limiting member, which can reduce the weight of the frame and reduce the processing difficulty of the frame. In addition, when the battery cell is squeezed, the limiting member can buffer the squeezing force on the battery cell, reducing the risk of failure caused by the direct squeezing of the battery cell. Furthermore, the frame is not too low, so as to support the limiting member and further improve the stabilizing effect of the limiting member on the battery cell.

[0041] In some embodiments of the first aspect, the battery device further includes a strap that surrounds the battery cell assembly, the strap being located on the side of the limiting member away from the base plate, and the strap and the limiting member being spaced apart in the first direction.

[0042] In the technical solution of this application embodiment, the battery cell assembly is fixedly mounted around the straps, which can secure the battery cell assembly and reduce damage caused by vibration, impact, or accidental collision, thereby reducing the risk of leakage or thermal runaway. Furthermore, by tightly binding the battery cell assembly together with the straps, space can be utilized more effectively, increasing the energy density of the battery cell assembly. Also, the straps are located on the side of the limiting member away from the base plate, ensuring that the two are spaced apart and do not interfere with each other.

[0043] In some embodiments of the first aspect, the frame is formed of a hollow body.

[0044] In the technical solution of this application embodiment, the frame is set as a hollow structure, which can reduce the weight of the battery device and achieve lightweighting of the battery device. Furthermore, the hollow structure of the frame facilitates connection with the support components, limiting components or the base plate through connectors.

[0045] In some embodiments of the first aspect, the battery cell has a third wall adjacent to the first wall, the third wall being the wall with the largest area in the battery cell, and the second direction being perpendicular to the third wall.

[0046] In the technical solution of this application embodiment, since the second support member and / or limiting member extend along the second direction and do not abut against the third wall perpendicular to the second direction, that is, the second support member and / or limiting member are disposed on the wall other than the largest area in the battery cell. When the battery cell expands, the expansion force on the largest wall is the greatest. By disposing of the second support member and / or limiting member on other walls, the damage to the second support member and / or limiting member by the expansion force can be reduced. Especially for the second support member and / or limiting member being a water-cooled plate with internal flow channels, since the second support member and / or limiting member extends along the direction perpendicular to the third wall, the expansion force in that direction can be better unloaded, thereby improving the battery device's resistance to compression.

[0047] In some embodiments of the first aspect, the base plate is disposed on the side of the frame away from the battery cell assembly.

[0048] In the technical solution of this application embodiment, the base plate is located on the side of the frame away from the cover. The battery cells can be supported by the frame or support components, thereby reducing the load on the battery cells from the base plate, reducing wear on the base plate, and thus improving the performance of the battery device. Furthermore, the increased space between the base plate and the battery cells further improves the discharge speed of the battery cell exhaust. In the event of external impacts or other problems, the base plate can also protect the battery cells, reducing the risk of damage and further improving the performance of the battery device.

[0049] In some embodiments of the first aspect, the base plate is provided with a plurality of weak areas, which are corresponding to the pressure relief mechanisms of a plurality of battery cells. The weak areas are configured to be damaged when the pressure or temperature inside the battery device reaches a predetermined threshold.

[0050] In the technical solution of this application embodiment, multiple weak areas are provided on the base plate, and the multiple weak areas are correspondingly provided with the pressure relief mechanisms of multiple battery cells. That is, in the first direction, each battery cell's pressure relief mechanism is directly opposite a weak area. Thus, in the event of thermal runaway in any battery cell, the emissions inside the battery cell can be preferentially discharged from the corresponding weak area, further accelerating the discharge speed of the emissions and reducing the risk of emissions accumulating inside the battery device due to poor discharge, leading to insulation failure of the battery cell.

[0051] In some embodiments of the first aspect, the distance L between the first wall of the battery cell and the base plate is: 5mm ≤ L ≤ 20mm.

[0052] In the technical solution of this application embodiment, setting the distance L between the first wall and the bottom plate to be greater than or equal to 5mm allows a certain discharge space to be formed between the first wall and the bottom plate, so that the emissions inside the battery cell that has experienced thermal runaway can be quickly discharged to the outside of the battery device through the discharge space; setting the distance L between the first wall and the bottom plate to be less than or equal to 20mm allows the emissions inside the battery cell to be discharged quickly while improving the space utilization of the battery device, thereby increasing the energy density of the battery device.

[0053] In some embodiments of the first aspect, the base plate is bonded to the frame by adhesive bonding or thermal fusion; and / or the cover is bonded to the frame by adhesive bonding or thermal fusion.

[0054] In the technical solution of this application embodiment, the cover and frame are connected by adhesive bonding or thermal fusion; and / or, the base plate and frame are connected by adhesive bonding or thermal fusion. This can improve the connection strength between the two components, and in the event of a failure in one component, the faulty component can be quickly replaced without damaging other components, thereby improving the utilization rate of the battery device and further enhancing its performance. Furthermore, adhesive bonding or thermal fusion can achieve a sealing effect between the cover and frame, and between the base plate and frame, without the need for additional structures such as sealing rings, thus improving the sealing performance of the battery device and simplifying its structure.

[0055] In some embodiments of the first aspect, the battery cell assembly is connected to the cover.

[0056] In the technical solution of this application embodiment, the battery cell assembly is connected to the cover, so that the cover can bear part of the weight of the battery cell assembly, further improving the stability of the battery cell.

[0057] In a second aspect, an electrical device is provided, including a battery device as described in the first aspect or any embodiment thereof, the battery device being used to provide electrical energy. Attached Figure Description

[0058] Figure 1 A schematic diagram of the structure of a vehicle according to an embodiment of this application is shown;

[0059] Figure 2 A schematic diagram of the structure of a battery device according to an embodiment of this application is shown;

[0060] Figure 3 A top view of a battery device according to an embodiment of this application is shown;

[0061] Figure 4 A cross-sectional view of a battery device according to an embodiment of this application is shown;

[0062] Figure 5 A cross-sectional view of a battery device according to another embodiment of this application is shown;

[0063] Figure 6 A partial structural schematic diagram of a battery device according to an embodiment of this application is shown;

[0064] Figure 7 A partial cross-sectional view of a battery device according to an embodiment of this application is shown;

[0065] Figure 8 A cross-sectional view of a battery device according to another embodiment of this application is shown;

[0066] Figure 9 A partial structural schematic diagram of a battery device according to another embodiment of this application is shown;

[0067] Figure 10 A partial structural schematic diagram of a battery device according to another embodiment of this application is shown;

[0068] Figure 11 A partial cross-sectional view of a battery device according to another embodiment of this application is shown;

[0069] Figure 12 A cross-sectional view of a battery device according to another embodiment of this application is shown;

[0070] Figure 13 A partial structural schematic diagram of a battery device according to another embodiment of this application is shown;

[0071] Figure 14 A schematic diagram of the structure of a base plate according to an embodiment of this application is shown.

[0072] The accompanying drawings are not drawn to scale. Detailed Implementation

[0073] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0074] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0075] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0076] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0077] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0078] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0079] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0080] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0081] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0090] 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.

[0091] In some embodiments, the battery device may be a battery pack, which includes a housing and individual battery cells, with the individual battery cells or battery modules housed within a cover.

[0092] In some embodiments, the housing in this application can be part of the vehicle's chassis structure. For example, a portion of the housing can be at least a part of the vehicle's floor, or a portion of the housing can be at least a part of the vehicle's crossbeams and longitudinal beams.

[0093] With increasing environmental pollution, the new energy industry is attracting more and more attention. Battery technology is a crucial factor in the development of the new energy industry, especially the reliability of power batteries, which directly affects the promotion and popularization of key applications such as electric vehicles and energy storage systems. However, battery cells may experience thermal runaway under abnormal conditions such as overcharging, overheating, or internal short circuits, leading to a sharp increase in internal pressure. If pressure is not released in time, there is a risk of failure of the battery cell or even the entire battery device. Therefore, it is essential to design the battery device structure rationally to ensure the stable use of individual battery cells while improving the overall reliability of the battery device.

[0094] This application provides a battery device and an electrical appliance that can solve the above-mentioned problems. The battery device of this application includes a frame, a cover, a base plate, a battery cell assembly, and a support assembly. Specifically, the frame has a first opening and a second opening on both sides along a first direction, and the first and second openings are interconnected; the cover is connected to the frame and closes the first opening; the base plate is connected to the frame and closes the second opening, and the frame, cover, and base plate together define an accommodating space; the battery cell assembly is accommodated in the accommodating space, and the battery cell assembly includes multiple battery cells arranged along a second direction. Each battery cell includes a pressure relief mechanism disposed on a first wall of the battery cell, and the second direction is perpendicular to the first direction; the support assembly is accommodated in the accommodating space and connected to the frame. The first wall portion of each battery cell is mounted on the surface of the support assembly away from the base plate to form a gap space between the first wall and the base plate, and the pressure relief mechanism of each battery cell is disposed opposite to the gap space.

[0095] In this embodiment, on the one hand, the pressure relief mechanism is located on the first wall and directly facing the gap space, ensuring that the side of the pressure relief mechanism facing the base plate is unobstructed. In the event of thermal runaway, high-temperature gases and other emissions can be rapidly discharged into the gap space, thereby reducing the risk of emissions spreading to the surrounding area and affecting adjacent battery cells, and improving the overall reliability of the battery device. Furthermore, the first wall of the battery cell is supported by the support assembly, which elevates the battery cell, allowing the gap space to directly serve as a pressure relief channel without the need for additional discharge pipes, thus increasing the discharge speed while simplifying the internal structure of the battery device. On the other hand, due to the frame's good structural strength, the support assembly is connected to the frame, and the first wall of the battery cell is supported by the support assembly, improving the support strength of the support assembly for the battery cell. Moreover, the gap space can absorb some of the deformation of the base plate when impacted, thereby reducing the risk of damage or even failure of the battery cell due to impact, improving the overall impact resistance of the battery device. Simultaneously, the combination of the support assembly and the frame simplifies the structure of the battery device and increases its lightweight nature.

[0096] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices.

[0097] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0098] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0099] For example, such as Figure 1 The diagram shown is a structural schematic of a vehicle 1 according to one embodiment of this application. Vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A motor 40, a controller 30, and a battery device 10 can be installed inside vehicle 1. The controller 30 controls the battery device 10 to supply power to the motor 40. For example, the battery device 10 can be installed at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1. For example, the battery device 10 can serve as the operating power source for vehicle 1, for example, to meet the electrical system requirements of vehicle 1, such as for starting, navigation, and operation. In another embodiment of this application, the battery device 10 can not only serve as the operating power source for vehicle 1, but also as the driving power source for vehicle 1, replacing or partially replacing gasoline or natural gas to provide driving power for vehicle 1.

[0100] Figure 2 A schematic diagram of the structure of the battery device 10 according to an embodiment of this application is shown; Figure 3 A top view schematic diagram of the battery device 10 according to an embodiment of this application is shown, for example, Figure 3 As shown Figure 2 A schematic diagram of the battery device 10 after assembly along the Z direction; Figure 4 A cross-sectional view of the battery device 10 according to an embodiment of this application is shown, for example, Figure 4 As shown Figure 3 A schematic cross-sectional view of the battery device 10 shown along section line A-A'.

[0101] like Figures 2 to 4As shown, the battery device 10 in this application embodiment may include a frame 11, a cover 12, a base plate 13, a battery cell assembly 14, and a support assembly 15. Specifically, the frame 11 has a first opening 1101 and a second opening 1102 on both sides along the first direction, and the first opening 1101 and the second opening 1102 are interconnected; the cover 12 is connected to the frame 11 and closes the first opening; the bottom plate 13 is connected to the frame 11 and closes the second opening 1102, and the frame 11, the cover 12 and the bottom plate 13 together define a receiving space; the battery cell assembly 14 is received in the receiving space, and the battery cell assembly 14 includes a plurality of battery cells 20 arranged along the second direction. The battery cell 20 includes a pressure relief mechanism 21, which is disposed on the first wall 201 of the battery cell 20, and the second direction is perpendicular to the first direction; the support assembly 15 is received in the receiving space, and the support assembly 15 is connected to the frame 11. The first wall 201 of each battery cell 20 is partially laid on the surface of the support assembly 15 away from the bottom plate 13 to form a gap space 101 between the first wall 201 and the bottom plate 13. The pressure relief mechanism 21 of each battery cell 20 is disposed opposite to the gap space 101.

[0102] For ease of description, this application primarily uses a near-rectangular-pitch battery device 10 as an example. Furthermore, based on this rectangular-pitch battery device 10, this application defines three reference directions. The height direction of the battery device 10 is the first direction Z, the length direction of the battery device 10 is the second direction Y, and the width direction of the battery device 10 is the third direction X. The width, length, and height directions of the battery device 10 are perpendicular to each other, and the width dimension of the battery device 10 is smaller than its length dimension.

[0103] It should be understood that the frame 11 of the battery device 10 in this embodiment can be used to support multiple battery cells 20. The frame 11 in this embodiment can be a hollow structure formed by four beams connected end-to-end, and has at least one opening. For example, the frame 11 can have two openings, located at both ends of the frame 11 along the first direction Z. The frame 11 can also have multiple openings, for example, four openings, located at the four end faces of the frame 11 parallel to the first direction Z. This embodiment is not limited to these.

[0104] In this embodiment, the frame 11 may further include multiple beams, such as multiple longitudinal beams and multiple transverse beams between four beams arranged in pairs opposite each other. Additionally, the cross-sectional shape of each beam may be rectangular, polygonal, plate-shaped, or irregular, such as L-shaped, T-shaped, or C-shaped.

[0105] In some embodiments, the frame 11 may have a first opening 1101 and a second opening 1102, and the first opening 1101 and the second opening 1102 are respectively located on both sides of the frame 11 along the first direction Z. A plurality of battery cells 20 can be placed from the first opening 1101 or the second opening 1102 into the receiving space formed by the cover 12, the frame 11 and the base plate 13.

[0106] In this embodiment of the application, the cover 12 and the base plate 13 of the battery device 10 can both be connected to the frame 11 and respectively cover the two openings of the frame 11.

[0107] It should be understood that the structures of the cover 12 and the base plate 13 in this application embodiment can be configured according to actual applications. For example, the cover 12 and the base plate 13 can both be hollow cuboids with one face as an opening. The opening of the cover 12 is opposite to the first opening 1101 of the frame 11, and the opening of the base plate 13 is opposite to the second opening 1102 of the frame 11. The cover 12 and the side containing the first opening 1101 of the frame 11 are interlocked, and the base plate 13 and the side containing the second opening 1102 of the frame 11 are interlocked. The cover 12, the frame 11, and the base plate 13 together form a closed chamber.

[0108] For example, the cover 12 is a hollow cuboid with one open side, and the base plate 13 is a plate-like structure with a certain thickness. The opening of the cover 12 is positioned opposite to the first opening 1101 of the frame 11, so that the cover 12 covers the first opening 1101 of the frame 11. The base plate 13 covers the second opening 1102 of the frame 11, and the cover 12, the frame 11, and the base plate 13 together form a closed chamber.

[0109] The enclosed chamber formed by the cover 12, frame 11, and base plate 13 can accommodate multiple battery cells 20. Multiple battery cells 20 are connected in parallel, series, or mixed configurations and placed within the accommodating space formed by the sequential fastening of the cover 12, frame 11, and base plate 13. The cover 12, frame 11, and base plate 13 have a simple structure and can be adapted to different models of battery cells 20, allowing for modular production. Furthermore, the cover 12 and frame 11, and the frame 11 and base plate 13, can be connected using simple methods such as connectors, adhesive bonding, or heat fusion, enabling rapid assembly of the battery device 10 and improving its assembly efficiency. Alternatively, the frame 11 and base plate 13 can be integrally formed. For example, the base plate 13 has a plate-like structure, with its edges bent to form the frame 11.

[0110] It should be understood that the shapes of the cover 12, frame 11 and base plate 13 in the embodiments of this application can be determined according to the shape of the components that are commonly housed by the three, for example, according to the shape of the combination of multiple battery cells 20 housed inside.

[0111] The battery device 10 of this application embodiment may include a plurality of battery cells 20 to meet different power usage requirements. The shape of the battery cell 20 in this application embodiment can be set according to actual application. For example, the battery cell 20 can be as follows: Figure 2 The cuboid shown can also be different. Figure 2 The embodiments shown are cylindrical or other shapes, but are not limited to these.

[0112] In some embodiments, to improve the space utilization within the battery device 10, the battery cells 20 within the battery device 10 are typically arranged in a certain pattern. For example, as... Figure 2 As shown, the battery device 10 may include a plurality of battery cells 20 arranged along the second direction Y; further, if the number of battery cells 20 in the battery device 10 is large, the battery device 10 may also include a plurality of battery cell assemblies 14 arranged along the third direction X.

[0113] The battery cell 20 in this embodiment may be provided with a pressure relief mechanism 21, which can be used to discharge the internal gas of the battery cell.

[0114] For example, the internal pressure or temperature of the battery cell 20 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 20 reaches the predetermined threshold, the pressure relief mechanism 21 is activated or a weak structure in the pressure relief mechanism 21 is damaged, thereby forming an opening or channel for the internal pressure or temperature to be released. The threshold design varies depending on the design requirements.

[0115] It should be understood that actuation can refer to the pressure relief mechanism 21 being activated or reaching a certain state, thereby releasing the internal pressure and temperature of the battery cell 20. The actions of the pressure relief mechanism 21 may include, but are not limited to: movement of components within the pressure relief mechanism 21 to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism 21, etc. When the pressure relief mechanism 21 is actuated, the high-temperature, high-pressure substances inside the battery cell 20 are discharged outwards from the actuated portion as emissions. In this way, the battery cell 20 can be depressurized and de-temperatured under controllable pressure or temperature, thereby preventing potentially more serious accidents. The emissions from the battery cell 20 include, but are not limited to: electrolyte, dissolved or broken positive and negative electrode plates, fragments of the separator, high-temperature, high-pressure gases generated by the reaction, flames, etc.

[0116] The battery device 10 of this application embodiment may include a support assembly 15. The support assembly 15 is housed within a receiving space formed by the cover 12, the frame 11, and the base plate 13. The support assembly 15 is connected to the frame 11 to support the battery cell 20. Compared to a lower casing manufactured using integral injection molding, the structure of the support assembly 15 combined with the frame 11 is lighter and simpler, thereby improving the weight reduction of the battery device 10 and enhancing its range.

[0117] It should be understood that the support component 15 is mainly used to support the battery cell 20. The support component 15 can be connected to the frame 11 or it can be integrally formed with the frame 11.

[0118] The first wall 201 of the battery cell 20 is partially mounted on the surface of the support assembly 15 away from the base plate 13, that is, the first wall 201 of the battery cell 20 is the wall of the battery cell 20 facing the base plate 13. The pressure relief mechanism 21 is provided on the first wall 201, so that the pressure relief direction is towards the base plate 13, to prevent high temperature and high pressure gas or ejected material from directly impacting adjacent battery cells 20, circuits or other structures, and to reduce the risk of heat spread.

[0119] The first wall 201 of the battery cell 20 is mounted on the support assembly 15, forming a gap space 101 between the pressure relief mechanism 21 and the base plate 13. This gap allows for rapid flow and discharge of waste gas from the pressure relief mechanism 21, reducing the risk of battery cell 20 failure and improving the reliability of the battery assembly 10. Furthermore, the gap space can absorb some of the deformation of the base plate 13 upon impact, further reducing the risk of damage or even failure of the battery cell 20 due to impact.

[0120] It should be understood that the support assembly 15 has a certain thickness, and the first wall 201 of the battery cell 20 is mounted on the support assembly 15, which increases the distance between the battery cell 20 and the base plate 13. This raises the space 101 between the pressure relief mechanism 21 and the base plate 13, further increasing the emission rate of the emissions inside the battery cell 20 and improving the reliability of the battery cell 20. In addition, the space 101 can be directly used as a pressure relief channel, eliminating the need for additional emission pipelines, thereby increasing the emission speed while simplifying the internal structure of the battery device 10.

[0121] Furthermore, the first wall 201 of the battery cell 20 is partially supported on the support assembly 15, and the pressure relief mechanism 21 of the battery cell 20 is positioned opposite the space 101. This can mean that the outer periphery of the first wall 201 is supported on the support assembly 15, or that all other areas of the first wall 201 except for the pressure relief mechanism 21 are supported on the support assembly 15. In other words, the support assembly 15 at least does not cover the area of ​​the first wall 201 where the pressure relief mechanism 21 is located, thus ensuring unobstructed access between the pressure relief mechanism 21 and the base plate 13, allowing for rapid discharge of waste materials from inside the battery cell 20.

[0122] For example, in a third direction X perpendicular to the first direction Z and the second direction Y, the minimum distance between the pressure relief mechanism 21 and the side wall of the battery cell 20 perpendicular to the third direction X is greater than the length of the portion of the support assembly 15 abutting against the first wall 201 of the battery cell 20, so that the support assembly 15 will not block the pressure relief mechanism 21, thereby improving the discharge efficiency of the emissions inside the battery cell 20.

[0123] In this embodiment, the pressure relief mechanism 21 is mounted on the first wall 201 and faces the spacer 101, ensuring that the side of the pressure relief mechanism 21 facing the base plate 13 is unobstructed. In the event of thermal runaway of the battery cell 20, high-temperature gases and other emissions can be rapidly discharged into the spacer 101, thereby reducing the risk of emissions spreading to the surrounding area and affecting adjacent battery cells 20, and improving the overall reliability of the battery device 10. Furthermore, the first wall 201 of the battery cell 20 is supported by the support assembly 15, which elevates the battery cell 20. The spacer 101 can directly serve as a pressure relief channel, eliminating the need for additional discharge pipes, thus increasing the discharge speed while simplifying the internal structure of the battery device 10. On the other hand, since the frame 11 has good structural strength, the support component 15 is connected to the frame 11, and the first wall 201 of the battery cell 20 is mounted on the support component 15, which can improve the support strength of the support component 15 for the battery cell 20. In addition, the space 101 can absorb part of the deformation of the base plate 13 when it is impacted, thereby reducing the risk of damage or even failure of the battery cell 20 due to impact, improving the overall impact resistance of the battery device 10. At the same time, the combination of the support component 15 and the frame 11 can simplify the structure of the battery device 10 and improve the lightweight of the battery device 10.

[0124] In some embodiments, such as Figure 4 As shown, the support assembly 15 includes a first support member 151, which is connected to the side of the frame 11 near the battery cell 20. The first wall 201 of the battery cell 20 is partially attached to the surface of the first support member 151 away from the base plate 13.

[0125] The support component 15 in this embodiment includes a first support member 151, which is connected to the side of the frame 11 near the battery cell 20, i.e., the first support member 151 is located on the side of the frame 11 facing the receiving space. It should be understood that the first support member 151 can be connected to any one or more of the four beams of the frame 11. For example, if the frame 11 is formed by four beams connected end-to-end, the first support member 151 can also include four parts, each located on the side of the four beams of the frame 11 facing the receiving space. That is, the first support member 151 extends towards the center of the frame 11 in a direction perpendicular to the first direction Z. As another example, the first support member 151 can include two parts, each connected to two beams arranged along a third direction X in the frame 11, and the first support member 151 is located on the side of these two beams facing the receiving space, wherein the third direction is perpendicular to the first and second directions.

[0126] The first wall 201 of the battery cell 20 rests on the surface of the first support 151 away from the base plate 13, that is, the first wall 201 of the battery cell 20 rests on the first support 151. It should be understood that the first wall 201 of the battery cell 20 can be directly resting on the first support 151 or indirectly resting on the first support 151. For example, if the battery device 10 includes a battery cell assembly 14, that is, the battery device 10 includes a row of battery cells 20 arranged along the second direction Y, then in the direction perpendicular to the second direction Y and parallel to the first wall 201, the edge portions on both sides of the first wall 201 of the battery cell 20 rest directly on the first support 151.

[0127] For example, the battery device 10 includes a plurality of battery cell assemblies 14 arranged along a third direction X. In the third direction X, the edge of the outermost first wall 201 of the plurality of battery cells 20 is directly attached to the first support member 151. In the third direction X, the two adjacent battery cells 20 near the middle of the outermost battery cells can be bonded to each other and the abutting force is transmitted to the outermost battery cell 20, so that the battery cell 20 near the middle will not fall off, thereby realizing that the battery cell 20 near the middle is indirectly attached to the first support member 151.

[0128] For example, the battery device 10 includes multiple battery cell assemblies 14, which are arranged along a third direction X. The support assembly 15 may also include other support members. In the third direction X, the edge of the outermost first wall 201 of the multiple battery cells 20 is directly supported on the first support member 151. The two adjacent battery cells 20 near the middle, except for the outermost ones, are supported on other support members besides the first support member 151. The other support members extend along the second direction Y and are connected to the first support member 151 at both ends along the second direction Y, thereby realizing that the battery cells 20 near the middle are indirectly supported on the first support member 151.

[0129] It should be understood that the height of the first support member 151 along the first direction Z can be lower than the height of the frame 11 along the first direction Z, that is, the first support member 151 is connected to the part of the frame 11 near the bottom plate.

[0130] In this embodiment, the first support member 151 is located on the side of the frame 11 facing the accommodating space, forming an inwardly extending support platform to provide a mounting surface for the battery cell assembly 14. This disperses the load pressure on the frame 11, preventing excessive local stress on the frame 11 and improving the overall structure's resistance to deformation and mechanical strength. Furthermore, as a load-bearing platform, the first support member 151 further reduces the support height of the frame 11 on the battery cell assembly 14, improving the space utilization rate inside the battery device 10.

[0131] In some embodiments, the first support member 151 and the frame 11 are integrally formed. The integral formation of the first support member 151 and the frame 11 can improve the support strength of the support assembly 15 and improve the structural stability of the battery device 10.

[0132] In some embodiments, such as Figures 2 to 4 As shown, the support assembly 15 may further include a second support member 152 extending along the second direction Y. The two ends of the second support member 152 along the second direction Y are connected to the frame 11, and the first wall 201 portion of the battery cell 20 of the battery cell assembly 14 abuts against the second support member 152.

[0133] It should be understood that there may be one or more second support members 152. For example, in some embodiments, the battery device 10 includes two battery cell assemblies 14 arranged along a third direction X, and the support assembly 15 includes a first support member 152 extending along a second direction Y. In this case, the portions of the first walls 201 of the battery cells 20 of the two battery cell assemblies 14 that are close to each other abut against the first support member 152.

[0134] For example, in some embodiments, the battery device 10 includes a plurality of battery cell assemblies 14 arranged along a third direction X, and the support assembly 15 includes a first support member 152 extending along a second direction Y. In this case, the first wall 201 of the battery cells 20 of any two adjacent battery cell assemblies 14 abuts against the first support member 152.

[0135] For example, in some embodiments, reference continues to be made to... Figures 2 to 4 The battery device 10 includes a plurality of battery cell assemblies 14 arranged along a third direction X. The support assembly 15 also includes a plurality of second support members 152 extending along a second direction Y. The plurality of second support members 152 are spaced apart along the third direction X. The plurality of second support members 152 are respectively connected to the frame 11. The first wall 201 of each battery cell 20 partially rests on the surface of the second support member 152 away from the base plate 13. The third direction is perpendicular to the first direction and the second direction.

[0136] The support component 15 in this embodiment further includes a second support member 152, which extends along the second direction Y, thereby enabling it to support a plurality of battery cells 20 arranged along the second direction.

[0137] One or more second support members 152 can be provided. In this embodiment, multiple second support members 152 are provided, and the second support members 152 are spaced apart along the third direction X. That is, multiple second support members 152 are spaced apart, so as to support multiple battery cells 20 in multiple battery cell assemblies 14 arranged along the third direction X.

[0138] The second support member 152 is connected to the frame 11 by means of adhesive bonding, snap-fit, screws or bolts, etc.

[0139] It should be understood that the connection between the second support member 152 and the frame 11 can mean that the second support member 152 is directly connected to the frame 11, or that the second support member 152 is connected to the frame 11 through the first support member 151, or that the second support member 152 is connected to the frame 11 through other components.

[0140] For example, in some embodiments, the frame 11 has a plurality of crossbeams arranged along a second direction Y, the crossbeams extending along a third direction X and connecting at both ends of the third direction X to two of the four beams of the frame 11 arranged along the third direction X. Then the second support member 152 can be connected to one or more crossbeams in the frame 11, thereby connecting the second support member 152 to the frame 11 via the crossbeams.

[0141] For example, in some embodiments, the second support member 152 may also be erected on the surface of the first support member 151 away from the base plate 13 and connected to the first support member 151. In this case, the second support member 152 is connected to the frame 11 through the first support member 151.

[0142] It should be understood that the two ends of the second support member 152 along the second direction Y can be mounted on the first support member 151. The connection between the second support member 152 and the first support member 151 can be interpreted as the connection between the two ends of the second support member 152 along the second direction Y and the first support member 151.

[0143] In this embodiment of the application, the first wall 201 of each battery cell 20 is partially attached to the surface of the second support member 152 away from the base plate 13. This can refer to the fact that the other areas of the first wall 201 of the battery cell 20, excluding the pressure relief mechanism 21, are partially or completely attached to the surface of the second support member 152 away from the base plate 13. For example, the second support member 152 can completely abut against all parts of the first wall 201 of the battery cell 20 except for the pressure relief mechanism 21, that is, the projection of the second support member 152 in the first direction Z completely covers the projection of all areas of the first wall 201 of the battery cell 20 except for the pressure relief mechanism 21 in the first direction Z. As another example, the second support member 152 can also partially abut against the first wall 201 of the battery cell 20, for example, in the first direction Z, the projection of the second support member 152 covers the two side edge areas of the projection of the first wall 201 along the third direction X.

[0144] In this embodiment, by providing a second support member 152 to support multiple battery cells 20 in the multiple battery cell assembly 14, part of the gravitational load of the first support member 151 can be unloaded, reducing the risk of deformation caused by local stress concentration in the first support member 151 and improving the structural stability of the battery device 10. Furthermore, since the frame 11 has good structural strength, the connection between the second support member 152 and the frame 11 enhances the supporting effect of the second support member 152 on the battery cells 20, improving the stability of the battery device 10. In addition, the spaced arrangement of the first support members 151 reduces the overall weight of the battery device 10, improving its lightweight design.

[0145] In some embodiments, such as Figure 4 As shown, in the third direction X, the length L1 of the portion of the second support member 152 that abuts against the first wall 201 of the battery cell 20 is less than the minimum distance L2 between the pressure relief mechanism 21 of the battery cell 20 and the second wall 202 of the battery cell 20. The third direction X is perpendicular to the first direction Z and parallel to the first wall 201, and the second wall 202 is perpendicular to the third direction X.

[0146] It should be understood that the second wall 202 refers to the wall in the battery cell 20 that is perpendicular to the third direction X, that is, it can be as follows: Figure 4 The battery cell 20 shown refers to either of the two side walls. The minimum distance L2 between the pressure relief mechanism 21 and the second wall 202 refers to the minimum distance between the pressure relief mechanism 21 and the two side walls of the battery cell 20 that are perpendicular to the third direction X.

[0147] In this embodiment, the length of the portion of the second support member 152 that abuts against the first wall 201 is less than the minimum distance between the pressure relief mechanism 21 and the second wall 202. That is, the second support member 152 can avoid the pressure relief mechanism 21, thereby supporting the first wall 201 of the battery cell 20. This can reduce the risk that the high-temperature gas and other emissions cannot be released quickly due to the pressure relief mechanism 21 being blocked, which in turn leads to the accumulation of internal pressure and causes the battery cell 20 to fail.

[0148] In some embodiments, continue to refer to Figure 4 Electrode terminals 22 can also be provided on the first wall 201. When the battery cell 20 is inverted on the second support member 152, a gap is formed between the pressure relief mechanism 21 and the base plate 13. This facilitates faster release of pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold, thereby protecting the battery cell 20 and improving the performance of the battery device 10. Furthermore, the electrode terminals 22 have a certain height. By setting them on the first wall 201, the space raised by the second support member 152 of the battery cell 20 can accommodate the electrode terminals 22, thereby improving the space utilization of the battery device 10 and increasing its energy density. Additionally, the gap between the pressure relief mechanism 21 and the base plate 13, i.e., the gap between the battery cell assembly 14 and the base plate 13, reduces the load on the battery cell assembly 14 from the base plate 13, thus reducing the strength requirements of the base plate 13. A lightweight base plate 13 can be used to reduce the weight of the battery device 10.

[0149] In some embodiments, the battery cell 20 may include two electrode terminals 22, which may be disposed on other walls of the battery cell 20, such as in a blade battery. The two electrode terminals 22 may be disposed on two opposing walls other than the first wall 201. When the battery cell 20 is inverted on the second support member 152, a gap is formed between the pressure relief mechanism 21 and the base plate 13. This facilitates faster release of pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold, thereby protecting the battery cell 20 and improving the performance of the battery device 10. Furthermore, the gap between the pressure relief mechanism 21 and the base plate 13, i.e., the battery cell assembly 14 and the base plate 13, reduces the load on the battery cell assembly 14 from the base plate 13, thus reducing the strength requirements of the base plate 13. A lightweight base plate 13 can be used to reduce the weight of the battery device. Additionally, when the base plate 13 is impacted, the gap can absorb some of the deformation of the base plate 13, thereby reducing the risk of damage or even failure of the battery cell 20 due to impact.

[0150] In some embodiments, the length of the second support member 152 along the third direction X is less than the minimum distance between the electrode terminals 22 of two adjacent battery cells 20 along the third direction X. That is, the length of the portion of the second support member 152 that abuts against the first wall 201 is less than the minimum distance between the electrode terminals 22 and the second wall 202.

[0151] In this embodiment, the length of the portion of the second support member 152 that abuts against the first wall 201 is less than the minimum distance between the electrode terminal 22 and the second wall 202. That is, the second support member 152 covers the portion of the first wall 201 between the electrode terminal 22 and the nearest second wall 202, thereby supporting the first wall 201 of the battery cell 20. In this way, the electrode terminal 22 can be disposed in the space between the first wall 201 and the base plate 13, thereby improving the space utilization of the battery device 10 and increasing the energy density of the battery device 10.

[0152] It should be understood that the second support member 152 may include one or more. For example, the second support member 152 may include multiple second support members 152, and the multiple second support members 152 correspond one-to-one with multiple battery cells 20, that is, each second support member 152 corresponds to one battery cell 20.

[0153] For example, the second support member 152 may also extend along the second direction Y to abut against the plurality of battery cells 20 arranged along the second direction Y. In the second direction Y, the length of the second support member 152 may be less than or equal to the total length of the plurality of battery cells 20, so that the second support member 152 can better support the plurality of battery cells 20 arranged along the second direction Y.

[0154] In some embodiments, such as Figure 5 and Figure 6 As shown, Figure 5 As shown Figure 3 A schematic cross-sectional view of the battery device 10 shown along section line A-A'; Figure 6 A partial structural schematic diagram of the battery device 10 is shown. The second support member 152 includes at least one first sub-support member 1521. The two ends of the first sub-support member 1521 are connected to the frame 11 along the second direction Y. The two sides of the first sub-support member 1521 along the third direction X are spaced apart from the frame 11. The first walls 201 of the battery cells 20 of two adjacent battery cell assemblies 14 along the third direction X abut against the same first sub-support member 1521.

[0155] The second support member 152 includes at least one first sub-support member 1521. This can mean that each of the plurality of second support members 152 includes one or more first sub-support members 1521, or it can mean that some of the second support members 152 are the one or more first sub-support members 1521, while the remaining portion of the plurality of second support members 152 are other sub-support members.

[0156] The first walls 201 of the battery cells 20 of two adjacent battery cell assemblies 14 along the third direction X abut against the same first sub-support 1521, that is, the same first sub-support 1521 can support two adjacent battery cells 20 along the third direction X, or in other words, the first sub-support 1521 abuts against the first walls 201 of two adjacent battery cells 20 along the third direction X. Figure 5 For example, if the first battery cell 20a and the second battery cell 20b are adjacent in the third direction X, then the first sub-support 1521 simultaneously abuts against the first wall 201a of the first battery cell 20a and the first wall 201b of the second battery cell 20b.

[0157] It should be understood that the first battery cell 20a can be any one of the multiple battery cells 20, and the second battery cell 20b can be any one of the multiple battery cells 20 that is adjacent to the first battery cell 20a in the third direction X. Alternatively, the second battery cell 20b can be any one of the multiple battery cells 20, and the first battery cell 20a can be any one of the multiple battery cells 20 that is adjacent to the second battery cell 20b in the third direction X.

[0158] The first sub-support 1521 can completely abut against all parts of the first wall 201 of the battery cell 20 except for the pressure relief mechanism 21, that is, the projection of the first sub-support 1521 in the first direction Z completely covers the projection of all areas of the first wall 201 of the battery cell 20 except for the pressure relief mechanism 21 in the first direction Z. The first sub-support 1521 can also partially abut against the first wall 201 of the battery cell 20, for example, in the first direction Z, the projection of the first sub-support 1521 covers the two side edge areas of the projection of the first wall 201 along the third direction X.

[0159] In this embodiment, the same first sub-support 1521 supports the first walls 201 of two adjacent battery cells 20 in the third direction X, which can raise the battery cells 20 and increase the space between the first wall 201 of the battery cells 20 and the base plate 13, thereby increasing the emission rate of emissions. Furthermore, the first sub-support 1521 is connected to the frame 11 at both ends along the second direction Y, which can unload part of the gravity load of the first support 151, reduce the risk of deformation caused by local stress concentration in the first support 151, and improve the structural stability of the battery device 10.

[0160] It should be understood that the connection between the first sub-support member 1521 and the frame 11 can mean that the first sub-support member 1521 is directly connected to the frame 11, or that the first sub-support member 1521 is connected to the frame 11 through the first support member 151, or that the first sub-support member 1521 is connected to the frame 11 through the crossbeam of the frame 11.

[0161] Furthermore, the first sub-support member 1521 is spaced apart from the frame 11 on both sides along the third direction X, meaning that the first sub-support member 1521 does not contact or overlap with the frame 11 on both sides along the third direction X. That is, the first sub-support member 1521 has a certain width in the third direction X sufficient to support the edge portion of the first wall 201 of the battery cell 20, without being too wide in the third direction X, causing the first sub-support member 1521 to overlap with the frame 11 in the third direction X. The first sub-support member 1521 is spaced apart from the frame 11 on both sides along the third direction X, thereby reducing the amount of the first sub-support member 1521 used, which can provide support for the battery cell 20 while improving the lightweight of the battery device 10.

[0162] The first sub-support member 1521 can be one or more, and its number can be set according to actual needs. For example, the first sub-support member 1521 can be provided on the adjacent portions of the first walls 201 of all adjacent battery cells 20, or it can be selectively provided on the adjacent portions of the first walls 201 of some adjacent battery cells 20. As another example, when the battery device 10 includes two battery cell assemblies 14, the first sub-support member 1521 can be one, and the adjacent portions of the first walls 201 of the battery cells 20 of the two battery cell assemblies 14 abut against the first sub-support member 1521.

[0163] In some embodiments, the second support member 152 includes a plurality of first sub-support members 1521, which are spaced apart. In the third direction X, the edge portions of the first walls 201 of two adjacent battery cells 20 abut against the same first sub-support member 1521. That is, in the first direction Z, the projection of the first sub-support member 1521 at least partially overlaps with the projection of the first wall 201 of the battery cell 20. The plurality of first sub-support members 1521 are spaced apart and abut against the edge portions of the first walls 201 of two adjacent battery cells 20. The length of each first sub-support member 1521 in the third direction X only needs to be sufficient to abut against the first walls 201 of two adjacent battery cells 20, thereby saving the number of first sub-support members 1521 and reducing the overall weight of the battery device 10 to improve lightweighting. In addition, since the first walls 201 of two adjacent battery cells 20 abut against the same first sub-support member 1521, the first sub-support member 1521 can connect two adjacent battery cells 20, improving the structural stability of the group of multiple battery cells 20.

[0164] In some embodiments, continue as follows Figure 5 and Figure 6 As shown, the second support member 152 also includes two second sub-support members 1522. The two second sub-support members 1522 are respectively located on the outermost side of the plurality of first sub-support members 1521 along the third direction, and abut against the first wall 201 of the battery cell 20 of the battery cell assembly 14 located on the outermost side in the third direction X. The two second sub-support members 1522 are respectively mounted on the surface of the first support member 151 away from the base plate 13, and are respectively connected to the first support member 151.

[0165] It should be understood that the second support member 152 also includes two second sub-support members 1522. This can mean that each of the plurality of second support members 152 includes two second sub-support members 1522; or it can mean that some of the plurality of second support members 152 are the two second sub-support members 1522, while the remaining plurality of second support members 152 are other sub-support members. For example, the remaining plurality of second support members 152 can be one or more first sub-support members 1521.

[0166] For example, the battery device 10 includes a plurality of battery cell assemblies 14 arranged along a third direction X, and the second support 152 may include one or more first sub-supports 1521 and two second sub-supports 1522. Figure 5 For example, the battery device 10 includes four battery cell assemblies 14, and the second support member 152 includes three first sub-support members 1521 and two second sub-support members 1522. Of course, Figure 5 The first sub-support member 1521 can also be one or two.

[0167] For example, the battery device 10 includes two battery cell assemblies 14 arranged in a third direction X. The second support member 152 may include a first sub-support member 1521 and two second sub-support members. The first walls 201 of the battery cells 20 of the two battery cell assemblies 14 abut against the first sub-support member 1521, while the two second sub-support members 1522 abut against the outermost portions of the first walls 201 of the battery cells 20 of the two battery cell assemblies 14 along the third direction X.

[0168] Two second sub-support members 1522 are respectively erected on the surface of the first support member 151 away from the base plate 13 and are respectively connected to the first support member 151. It can mean that the two ends of the second sub-support member 1522 along the second direction Y are erected on the first support member 151 and connected to the first support member 151, or it can mean that any part of the second sub-support member 1522 in the second direction Y is directly placed on the first support member 151.

[0169] For example, the first support member 151 includes two parts, which are respectively connected to two beams arranged along the second direction Y in the frame 11. The first support member 151 is located on the side of the two beams facing the receiving space, that is, the first support member 151 extends along the third direction X. Then, the two ends of the second sub-support member 1522 along the second direction Y can be erected on the first support member 151 and connected to the first support member 151.

[0170] For example, the first support member 151 includes two parts, which are respectively connected to two beams arranged along the third direction X in the frame 11. The first support member 151 is located on the side of the two beams facing the receiving space, that is, the first support member 151 extends along the second direction Y, and the second sub-support member 1522 also extends along the second direction Y, so that the second sub-support member 1522 can be directly placed on the first support member 151 and connected to the first support member 151.

[0171] In this embodiment, the two second sub-support members 1522 abut against the first wall 201 of the battery cell 20 of the outermost battery cell assembly 14 in the third direction X. Specifically, the two second sub-support members 1522 are located between the first walls 201 on both sides of the outermost battery cells 20 in the third direction X and the first support member 151. The two second sub-support members 1522 can further elevate the outermost battery cell 20 in the third direction X, thereby increasing the space between the first wall 201 of the battery cell 20 and the base plate 13, and improving the emission rate of pollutants. Furthermore, the connection between the second sub-support members 1522 and the first support member 151 enhances the support for the battery cell 20 and improves the support performance of the battery device 10.

[0172] In the first walls 201 of multiple battery cells 20, there may be a certain gap between the adjacent first walls 201 of two battery cells 20. Other supporting components may be placed in the gap to abut against the battery cells 20 on both sides, thereby further improving the stability of the battery cells 20. Alternatively, the adjacent first walls 201 of two battery cells 20 may be bonded together, thereby improving the space utilization inside the battery device 10 and increasing the energy density of the battery device 10.

[0173] In some embodiments, in the second direction Y and / or the third direction X, the adjacent walls of two adjacent battery cells 20 are bonded together.

[0174] In this embodiment of the application, the first walls 201 of two adjacent battery cells 20 along the second direction Y and / or the third direction X are bonded to each other, that is, the two adjacent battery cells 20 are closely abutting each other, which can improve the stability of the battery cells 20, reduce the waste of space inside the battery device 10, and improve the energy density of the battery device 10.

[0175] In some embodiments, the second support 152 is connected to the first support 151 by adhesive bonding or by a connector; and / or the support assembly 15 is connected to the battery cell assembly 14 by adhesive bonding.

[0176] It should be understood that the support assembly 15 may include only the first support member 151, or the support assembly 15 may include both the first support member 151 and the second support member 152. All parts of the support assembly 15 that come into contact with the battery cell assembly 14 can be used as connection points. The parts of the support assembly 15 that come into contact with the battery cell assembly 14 can be directly bonded together, thereby better securing the battery cell 20.

[0177] The parts of the second support member 152 that come into contact with the first support member 151 can be used as connection points. The parts of the second support member 152 that come into contact with the first support member 151 can be directly connected by adhesive, or they can be connected by screws or bolts.

[0178] The second support member 152 may further include a plurality of first sub-support members 1521 and two second sub-support members 1522. The plurality of first sub-support members 1521 are arranged at intervals along a third direction, and the two second sub-support members 1522 are respectively located on both sides of the plurality of first sub-support members 1521 along the third direction X. The portions of the two second sub-support members 1522 adjacent to the first support member 151 may be bonded to the first support member 151 or connected to it via connectors. The plurality of first sub-support members 1521 extend along a second direction Y, and the portions at both ends in the second direction Y that contact the first support member 151 are bonded to or connected via connectors.

[0179] By bonding the support assembly 15 to the battery cell assembly 14, the shaking of the battery cell 20 can be reduced, improving the stability of the battery device 10. The second support member 152 is bonded to the first support member 151 or connected through a connector. The first support member 151 can provide certain support for the second support member 152, improving the supporting effect of the second support member 152 on the battery cell 20. The second support member 152 can unload part of the load on the first support member 151, reducing the risk of deformation caused by local stress concentration in the first support member 151, and improving the structural stability of the battery device 10.

[0180] When the second support member 152 is connected to the first support member 151 via a connector, the connection between the second support member 152 and the first support member 151 can be sealed. For example, an installation cavity can be provided inside the second support member 152, allowing the connector to pass through the installation cavity and connect to the first support member 151.

[0181] In some embodiments, such as Figure 7 As shown, Figure 7 As shown Figure 5 This is a schematic diagram of a portion B of the battery device 10 shown. The interior of the second support member 152 has a flow channel 100 through which a heat exchange medium passes, used to regulate the temperature of the battery cell assembly 14.

[0182] It should be understood that the second support member 152 has a flow channel 100 inside, meaning the second support member 152 can be a hollow structure, and reinforcing ribs can be provided inside the second support member 152 to improve its strength. Specifically, the second support member 152 can be a water-cooled plate. The heat exchange medium can be any substance capable of transferring heat, having a heating or cooling effect, thereby regulating the temperature of the battery device 10. The type of heat exchange medium is not limited; it can be gaseous or liquid, as long as the heat exchange medium can pass through the flow channel 100 to achieve the function of temperature regulation.

[0183] The second support member 152 of this application embodiment has an internal flow channel 100, which can support the battery cell 20 while also regulating the temperature of the battery cell 20. In cases where the temperature of the battery cell 20 is too high or too low, it can dissipate heat or cool the battery cell 20, reducing the risk of battery cell 20 failure and thus improving the overall performance of the battery device 10. Furthermore, the internal flow channel of the second support member 152, i.e., the second support member 152 is a hollow structure, makes the second support member 152 more resistant to tension, and can unload the expansion force of the battery cell 20 in its length direction, reducing the risk of battery cell 20 failure due to expansion and compression.

[0184] In some embodiments, the flow channel 100 inside the second support 152 may extend along the second direction, so that the flow channel 100 can penetrate the interior of the second support 152 extending along the second direction, thereby enabling temperature regulation of the plurality of battery cells 20 arranged along the second direction.

[0185] In some embodiments, the second support member 152 may include a first sub-support member 1521 and a second sub-support member 1522, both of which are provided with flow channels 100.

[0186] The first sub-support 1521 and the second sub-support 1522 not only provide support for the battery cell 20, but also regulate the temperature of the battery cell 20. In addition, integrating the temperature regulation function into the first sub-support 1521 and the second sub-support 1522 can save space for setting up a separate temperature regulation system, making the battery device 10 more compact and improving the performance of the battery device 10.

[0187] Continue to refer to Figure 7 In some embodiments, the second support member 152 also has a mounting cavity 1501 inside, the mounting cavity 1501 is isolated from the flow channel 100, and the second support member 152 and the first support member 151 are connected by a connector 155 passing through the mounting cavity 1501.

[0188] The connector 155 can be a screw or bolt, for example, a rivet screw or a self-tapping screw. By providing a mounting cavity 1501, which is hollow inside and isolated from the flow channel, the risk of the connector 155 puncturing the flow channel 100 and causing leakage of the heat exchange medium can be reduced. At the same time, the weight of the second support 152 can be further reduced, improving the overall lightweighting of the battery device 10.

[0189] In some embodiments, both the first sub-support 1521 and the second sub-support 1522 have mounting cavities 1501 inside. The mounting cavities 1501 are located near both ends of the first sub-support 1521 along the second direction Y and are isolated from the flow channel 100. The first sub-support 1521 and the first support 151 are connected by a connector 155 passing through the mounting cavities 1501. The mounting cavities 1501 of the second sub-support 1522 are located in the portion along the second direction Y that contacts the first support 151, and one or more mounting cavities 1501 may be provided. Multiple mounting cavities 1501 may be spaced apart along the second direction Y on the portions of the second sub-support 1522 that contact the first support 151.

[0190] In some embodiments, such as Figure 8 and Figure 9 As shown, Figure 8 As shown Figure 3 A schematic cross-sectional view of the battery device 10 shown along section line A-A'; Figure 9 A partial structural schematic diagram of the battery device 10 is shown. The battery device 10 also includes a limiting member 16 extending along the second direction Y, the limiting member 16 being accommodated in a receiving space, the limiting member 16 abutting against the second wall 202 of at least a portion of the battery cells 20 of the battery cell assembly 14, wherein the limiting member 16 is connected to the frame 11, and the second wall 202 is perpendicular to the first wall 201.

[0191] The battery device 10 of this application embodiment may include a limiting member 16. The limiting member 16 is housed within the receiving space formed by the cover 12, the frame 11, and the base plate 13. The limiting member 16 abuts against one or more battery cells 20 and is connected to the frame 11, thereby physically blocking one or more battery cells 20 to restrict their movement.

[0192] The limiting member 16 can also extend along the second direction Y, such that the length of the limiting member 16 in the second direction Y is long enough to abut against the plurality of battery cells 20 arranged along the second direction Y. In the second direction Y, the length of the limiting member 16 can be less than or equal to the total length of the plurality of battery cells 20, so that the limiting member 16 can better abut against the plurality of battery cells 20 arranged along the second direction Y.

[0193] It should be understood that the second wall 202 of the battery cell 20 can be any wall in the battery cell 20 that is perpendicular to the first wall 201. For example, the second wall 202 can be a wall in the battery cell 20 that is perpendicular to the second direction Y, or it can be a wall in the battery cell 20 that is perpendicular to the third direction X. Figure 8 and Figure 9 Taking the wall perpendicular to the X direction in the battery cell 20 as an example, the second wall 202 is used.

[0194] The limiting member 16 abuts against at least a portion of the second wall 202 of the battery cell 20, thereby limiting the movement of the battery cell 20 in a direction perpendicular to the second wall 202, reducing the risk of deformation or failure caused by displacement of the battery cell 20, and improving the stability and reliability of the battery device 10.

[0195] The limiting member 16 is connected to the frame, which can enhance the fixing effect on the battery cell 20. Furthermore, when the battery device 10 is subjected to external forces such as compression or collision, the limiting member 16 can transfer the force acting on the battery cell 20 to the frame 11, reducing the risk of deformation or breakage caused by excessive local stress on the battery cell 20.

[0196] In this embodiment, the limiting member 16 can abut against one or more battery cells 20 to form a physical block on one or more battery cells 20, thereby restricting their movement, reducing the movement of battery cells 20 during vibration, impact or charge / discharge expansion, reducing the risk of structural deformation or failure due to displacement of battery cells 20, and improving the structural stability and reliability of the battery device 10.

[0197] In some embodiments, the limiting member 16 can be a long strip-shaped structure with a certain thickness. The limiting member 16 is parallel to the second wall 202, which restricts the movement of the battery cell 20 in the direction perpendicular to the second wall 202, thereby reducing the risk of battery device 10 failure due to shaking and deformation of the battery cell 20.

[0198] In some embodiments, one or more limiting members 16 may be provided. For example, if the battery device 10 includes a plurality of battery cell assemblies 14, then the plurality of limiting members 16 may be respectively provided between the plurality of battery cell assemblies 14 to abut against the second wall 202 of the plurality of battery cells 20, thereby further reducing the shaking of the plurality of battery cells 20, restricting the movement of the plurality of battery cells 20, and improving the structural stability of the battery device 10.

[0199] In some embodiments, continue to refer to Figure 8 and Figure 9The battery device 10 includes a plurality of limiting members 16 arranged along a third direction X. Two of the limiting members 16 are located on the outermost side of the plurality of battery cell assemblies 14 in the third direction X, and abut against the outermost second wall 202 of the battery cell 20 of the two outermost battery cell assemblies 14 along the third direction X. In the third direction X, the adjacent second walls 202 of the battery cells 20 of two adjacent battery cell assemblies 14 abut against the same limiting member 16.

[0200] The plurality of limiting members 16 in this application embodiment may include three or more limiting members 16. Two of the plurality of limiting members 16 may be as follows: Figure 8 The first sub-limiting member 161 shown, among the multiple limiting members 16, excluding the two limiting members 16 that abut against the outermost second wall 202, the other limiting members 16 can be as follows: Figure 8 The second sub-limiting member 162 is shown.

[0201] It should be understood that there can be one or more second sub-limiting members 162, and their number can be set according to actual needs. For example, the second sub-limiting members 162 can be provided between all adjacent second walls 202 of two adjacent battery cells 20, or selectively between certain adjacent second walls 202 of two adjacent battery cells 20. For example, as Figure 10 As shown, Figure 10 A partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown. A second sub-limiting member 162 is provided between the adjacent second walls 202 of two adjacent battery cells 20 closest to the middle on the third direction X. No second sub-limiting member 162 is provided between other adjacent battery cells 20.

[0202] In this embodiment of the application, by providing a limiting member 16 on the second wall 202 of multiple battery cells 20 in multiple battery cell assembly 14, the limiting member 16 can abut against each row of battery cells 20, so that the battery cells 20 have good stability, thereby further improving the overall structural stability of the battery device 10.

[0203] In some embodiments, the limiting member 16 may extend along the first direction Z, thereby better abutting against the corresponding battery cell 20. The height of the limiting member 16 in the first direction Z may be less than or equal to the height of the battery cell 20 in the first direction Z, or slightly greater than the height of the battery cell 20 in the first direction Z, thereby improving the displacement limiting effect of the limiting member 16 on the battery cell 20, and saving the limiting member 16 from occupying too much space inside the battery device 10, thus improving the space utilization rate of the battery device 10.

[0204] In some embodiments, such as Figure 11 As shown, Figure 11 As shown Figure 8 This is a schematic diagram of a portion C of the battery device 10 shown. The limiting member 16 extends along the first direction Z. In the first direction Z, the ratio of the height H1 of the limiting member 16 to the height H2 of the battery cell 20 is K1, that is, K1=H1 / H2, which satisfies: 0.5≤K1≤1.

[0205] In this embodiment, the ratio K1 of the height H1 of the limiting member 16 to the height H2 of the battery cell 20 is set to be greater than or equal to 0.5, so that the limiting member 16 has sufficient area to abut against the battery cell 20, which can improve the stability of the battery cell 20; the ratio K1 of the height H1 of the limiting member 16 to the height H2 of the battery cell 20 is set to be less than or equal to 1, which improves the stability of the battery cell 20 while avoiding excessive space occupation inside the battery device 10 due to the limiting member 16 being too high, thereby improving the energy density of the battery device 10.

[0206] In some embodiments, the ratio K1 of the height H1 of the limiting member 16 to the height H2 of the battery cell 20 in this application embodiment can also be set to other values. For example, the value of K1 can be any one of the following values ​​or between any two of the following values: 0.5, 0.51, 0.52, 0.53, 0.54, 0.55, 0.57, 0.59, 0.6, 0.61, 0.63, 0.65, 0.66, 0.69, 0.7, 0.71, 0.73, 0.75, 0.8, 0.85, 0.9, 0.91, 0.93, 0.95, 0.96, 0.97, 0.98, 0.99, 1.

[0207] In some embodiments, continue to refer to Figure 11 The limiting member 16 also has a flow channel 100 for the heat exchange medium to pass through, which is used to regulate the temperature of the battery cell assembly 14.

[0208] It should be understood that the limiting member 16 has a flow channel 100 inside, meaning the limiting member 16 can be a hollow structure, and reinforcing ribs can be provided inside the limiting member 16 to improve its strength. Specifically, the limiting member 16 can be a water-cooled plate. The heat exchange medium can be any substance capable of transferring heat, having a heating or cooling effect, thereby regulating the temperature of the battery device 10. The type of heat exchange medium is not limited; it can be gaseous or liquid, as long as the heat exchange medium can pass through the flow channel to achieve the function of temperature regulation.

[0209] The limiting member 16 of this application embodiment has a flow channel 100 inside, which can restrict the movement of the battery cell 20 while also regulating the temperature of the battery cell 20. In cases where the temperature of the battery cell 20 is too high or too low, it can dissipate heat or cool the battery cell 20, reducing the risk of battery cell 20 failure and thus improving the overall performance of the battery device 10. Furthermore, the limiting member 16 has a hollow structure with a flow channel 100 inside, making it more resistant to tension and able to unload the expansion force of the battery cell 20 in its length direction, reducing the risk of battery cell 20 failure due to compression caused by expansion. In addition, integrating the temperature regulation function into the limiting member 16 saves space for a separate temperature regulation system, making the battery device 10 more compact and improving its performance.

[0210] In some embodiments, the flow channel 100 inside the limiting member 16 may extend along the second direction, so that the flow channel 100 can penetrate the interior of the limiting member 16 extending along the second direction, thereby enabling temperature regulation of the plurality of battery cells 20 arranged along the second direction.

[0211] In some embodiments, the limiting member 16 is connected to the frame 11 by adhesive bonding or by a connector; and / or the limiting member 16 is connected to the battery cell assembly 14 by adhesive bonding.

[0212] It should be understood that the portions of the limiting member 16 that contact the battery cell 20, and / or the portions of the limiting member 16 that contact the frame 11, can all be used as connection points. The portions of the limiting member 16 that contact the battery cell 20 can be directly connected by adhesive bonding, thereby better securing the battery cell 20. The portions of the limiting member 16 that contact the frame 11 can be directly connected by adhesive bonding, or they can be connected by screws or bolts, etc.

[0213] In this embodiment, the limiting member 16 is bonded to the battery cell 20, which can further reduce the shaking of the battery cell 20 and improve the stability of the battery device 10. The limiting member 16 is bonded to the frame 11 or connected through a connector. The frame 11 can provide certain support for the limiting member 16, thereby further improving the fixing effect of the limiting member 16 on the battery cell 20.

[0214] When the limiting member 16 is connected to the frame 11 via a connector, the connection between the limiting member 16 and the frame 11 can be sealed. For example, a mounting cavity can be provided inside the limiting member 16, allowing the connector to pass through the mounting cavity and connect to the frame 11.

[0215] In some embodiments, the limiting member 16 is at least partially located between the frame 11 and the battery cell assembly 14 adjacent to the frame 11, and the top end of the limiting member 16 along the first direction Z is higher than the top end of the portion of the frame 11 adjacent to the limiting member 16 along the first direction Z.

[0216] For example, such as Figure 11 As shown, the height H1 of the limiting member 16 along the first direction Z is higher than the height H3 of the frame 11 along the first direction Z.

[0217] It should be understood that the height H1 of the limiting member 16 along the first direction Z can refer to the height of the first sub-limiting member 161 in the limiting member 16 along the first direction Z, or it can refer to the height of the second sub-limiting member 162 in the limiting member 16 along the first direction.

[0218] The height H3 of the frame 11 along the first direction Z can refer to the height of the part of the frame 11 adjacent to the first sub-limiting member 161 along the first direction Z, or it can refer to the height of any one or more beams in the frame 11 along the first direction Z. Figure 11 The height of the portion of frame 11 adjacent to the first sub-limiting member 161 along the first direction Z is used as an example for illustration.

[0219] Setting the frame 11 to a lower height can reduce the weight of the frame 11, thereby reducing the overall weight of the battery device 10 and reducing the difficulty of processing. The height of the limiting member 16 is higher than that of the frame 11. In the event of a collision or compression of the battery cell 20, the part of the limiting member 16 that extends beyond the frame 11 in the first direction Z can replace the frame 11 and restrict the displacement of the battery cell 20. Furthermore, the material of the limiting member 16 can be a lightweight material to further reduce the overall weight of the battery device 10. At the same time, the limiting member 16 can buffer the compressed battery cell 20, unload the compressive force it receives, and reduce the risk of failure of the battery cell 20 due to compression deformation.

[0220] In some embodiments, in the first direction Z, the ratio of the height H1 of the limiting member 16 to the height H3 of the frame 11 is K2, that is, K2 = H1 / H3, and K2 satisfies 1.25 ≤ K2 ≤ 5.

[0221] The ratio K2 of the height H1 of the limiting member 16 to the height H3 of the frame 11 is greater than or equal to 1.25. On the one hand, the limiting member 16 is relatively longer than the frame 11, which can replace the function of the side beam of the frame 11, restricting the displacement of the battery cell 20 and reducing the risk of poor contact or open circuit failure caused by the movement of the battery cell 20. On the other hand, the frame 11 is relatively shorter than the limiting member 16, which can reduce the weight of the frame 11 and reduce the processing difficulty of the frame 11. In addition, when the battery cell is squeezed, the limiting member 16 can buffer the squeezing force on the battery cell 20, reducing the risk of failure caused by the direct squeezing of the battery cell 20.

[0222] The ratio K2 of the height H1 of the limiting member 16 to the height H3 of the frame 11 is less than or equal to 5. On the one hand, while improving the stability of the battery cell 20, it avoids the limiting member 16 from occupying too much space inside the battery device 10 due to being too high, thereby improving the energy density of the battery device 10. On the other hand, the frame 11, while reducing the overall weight of the battery device 10, has a certain height in the first direction Z, which can improve the stabilizing effect of the limiting member 16 on the battery cell 20, and further improve the structural stability and reliability of the battery device 10.

[0223] In some embodiments, the ratio K2 of the height H1 of the limiting member 16 to the height H3 of the frame 11 in this application embodiment can also be set to other values. For example, the value of K2 can be any one of the following values ​​or between any two of the following values: 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, 1.75, 2, 2.25, 2.5, 2.75, 3, 3.25, 3.5, 3.75, 4, 4.25, 4.3, 4.35, 4.4, 4.45, 4.5, 4.55, 4.6, 4.65, 4.7, 4.75, 4.8, 4.85, 4.9, 4.95, 5.

[0224] In some embodiments, the limiting member 16 and the support component 15, whose projections in the first direction Z have overlapping portions, are interconnected.

[0225] It should be understood that the support assembly 15 may include only a first support member 151 or a second support member 152, or the support assembly 15 may include a first support member 151 and a second support member 152. The second support member 152 may also include a plurality of first sub-support members 1521 and two second sub-support members 1522. In this case, the limiting member 16 and the support assembly 15 whose projections in the first direction Z overlap may refer to any one or more of the first support member 151 or the second support member 152 in the support assembly 15 that overlap with the corresponding limiting member 16.

[0226] The projections of the limiting member 16 and the support assembly 15 in the first direction Z have an overlapping portion. This can refer to the fact that for each battery cell 20 which is provided with both the limiting member 16 and the support assembly 15, the limiting member 16 abuts against the second wall 202 of the battery cell 20, the support assembly 15 abuts against the first wall 201 of the battery cell 20, and the support member 15 is located on the portion of the first wall 201 near the second wall 202.

[0227] The limiting component 16 is connected to the corresponding support component 15, which can be by means of bonding, hot melting, welding, snap-fitting, bolts and screws, etc., and the specific connection method is not limited.

[0228] In this embodiment, by connecting the limiting member 16 with its corresponding support component 15, on the one hand, the movement of the battery cell 20 can be restricted in two different directions, ensuring that the battery cell 20 maintains a precise position during use or assembly, reducing the risk of the battery cell 20 failing due to displacement caused by impact or compression; on the other hand, the two are connected to form a whole, which can further disperse the stress generated by external impact on the battery cell 20, reduce the risk of deformation or even failure of the battery cell 20 due to external force, and improve the overall rigidity of the battery device 10.

[0229] In some embodiments, the limiting member 16 and the support component 15, whose projections in the first direction Z overlap, can also be integrally formed. For example, the limiting member 16 and the support component 15 can be integrally formed by extrusion, casting, stamping, 3D printing, or other methods.

[0230] In this embodiment, the integrally formed limiting member 16 and support component 15 have no connection points, which can reduce stress concentration, further improve the overall rigidity, and simplify the assembly steps and reduce production costs.

[0231] In some embodiments, to enhance the securing effect on the battery cell assembly 14, a strap may be wrapped around the outer periphery of the battery cell assembly 14. The specific position of the strap can be adjusted according to actual conditions. For example, the strap may be wrapped around the upper part of the battery cell assembly 14. As another example, if the battery device 10 is provided with a limiting member 16, the strap may also be positioned on the upper part of the battery cell assembly 14 and located between the limiting member 16 and the battery cell assembly. Yet another example, the strap may be positioned on the portion of the limiting member 16 away from the base plate 13, i.e., the strap binds the limiting member 16 and the battery cell assembly 14 together, thereby improving the stability of the battery cell assembly 14.

[0232] In some embodiments, such as Figure 12 As shown, Figure 12 As shown Figure 3The diagram shows a cross-sectional view of the battery assembly 10 along section line D-D'. The battery assembly 10 also includes a strap 17 that surrounds the battery cell assembly 14 and is located on the side of the limiting member 16 away from the base plate 13.

[0233] It should be understood that the strap 17 is located on the side of the limiting member 16 away from the base plate 13, that is, the strap 17 and the limiting member 16 are spaced apart in the first direction Z, so that they do not interfere with each other and can further strengthen the fixing effect on the battery cell assembly 14. In addition, fixing the battery cell assembly 14 with the strap 17 can further resist the expansion force generated by the battery cell 20 and improve the overall performance of the battery device 10.

[0234] The material of the strap 17 can be steel, which can improve the fastening ability. It should be understood that the strap 17 can also be other materials such as plastic, etc. This application does not limit it.

[0235] In this embodiment, the battery cell assembly 14 is fixedly surrounded by the strap 17, which can secure the battery cell assembly 14 and reduce damage caused by vibration, impact, or accidental collision, thereby reducing the risk of leakage or thermal runaway. Furthermore, by tightly binding the battery cell assembly 14 together with the strap 17, space can be utilized more effectively, increasing the energy density of the battery cell assembly 14. Also, the strap 17 is located on the side of the limiting member 16 away from the base plate 13, ensuring that the two are spaced apart and do not interfere with each other.

[0236] In some embodiments, the battery cell 20 has a third wall 203, which is adjacent to the first wall 201 and perpendicular to the second direction Y. The third wall 203 is the wall with the largest area in the battery cell 20.

[0237] The third wall 203 is the wall with the largest area among the battery cells 20 and perpendicular to the second direction Y. That is, multiple battery cells 20 are arranged along the direction perpendicular to the wall with the largest area among the battery cells 20. The second support member 152 and the limiting member 16 extend along the direction perpendicular to the wall with the largest area among the battery cells 20. The second support member 152 and the limiting member 16 abut against the wall adjacent to the wall with the largest area among the battery cells 20, such as the side wall, top wall or bottom wall.

[0238] In this embodiment, since the second support member 152 and / or the limiting member 16 extend along the second direction Y and do not abut against the third wall 203 perpendicular to the second direction Y, that is, the second support member 152 and / or the limiting member 16 are disposed on the wall of the battery cell 20 other than the wall with the largest area. When the battery cell 20 expands, the expansion force on the wall with the largest area is the greatest. By disposing the second support member 152 and / or the limiting member 16 on other walls, the damage to the second support member 152 and / or the limiting member 16 caused by the expansion force can be reduced. Especially for the second support member 152 and / or the limiting member 16 being a water-cooled plate with internal flow channels, since the second support member 152 and / or the limiting member 16 extends along a direction perpendicular to the third wall 203, the expansion force in that direction can be better unloaded, thereby improving the battery device 10's resistance to compression.

[0239] In some embodiments, the battery device 10 may further include a protective element 18. For example... Figure 13 As shown, Figure 13 A partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown. For example, the battery cell 20 further includes a fourth wall 204, which is a wall in the battery cell 20 perpendicular to the first direction Z and close to the cover. The protective member 18 extends along the second direction Y and abuts against the fourth wall 204 of each battery cell 20 arranged along the second direction Y.

[0240] The protective member 18 extends along the second direction Y, such that the length of the protective member 18 in the second direction Y is long enough to abut against all the battery cells 20 arranged along the second direction Y, thereby limiting the displacement of all the battery cells 20 in the first direction Z, further improving the stability of the battery device 10, and the protective member 18 can also resist external pressure or vibration, reducing the risk of damage to the battery cells 20.

[0241] In some embodiments, the protective member 18 can be a long strip-shaped structure with a certain thickness. The protective member 18 is parallel to the fourth wall 204 of the battery cell 20, which restricts the movement of the battery cell 20 in the first direction Z, further reducing the risk of battery device 10 failure due to shaking and deformation of the battery cell 20.

[0242] In some embodiments, the protective element 18 may be provided in one or more ways. For example, the battery device 10 includes a plurality of battery cell assemblies 14, and the protective element 18 may abut against the fourth wall 204 of two adjacent battery cell assemblies 14, thereby further reducing the shaking of the plurality of battery cells 20, restricting the movement of the plurality of battery cells 20, and improving the structural stability of the battery device 10.

[0243] In some embodiments, the battery device 10 may include a plurality of battery cell assemblies 14 arranged along a third direction X, and the protective member 18 includes a plurality of first protective members 181, wherein the fourth walls 204 of two adjacent battery cells 20 in the third direction X abut against the same first protective member 181.

[0244] In this embodiment of the application, the fourth wall 204 of two adjacent battery cells 20 abuts against the same first protective member 181, that is, the same first protective member 181 can cover two adjacent battery cells 20.

[0245] The first protective member 181 can completely abut against the fourth wall 204 of the battery cell 20, that is, the projection of the first protective member 181 in the first direction Z completely covers the projection of the fourth wall 204 of the battery cell 20 in the first direction Z. The first protective member 181 can also partially abut against the fourth wall 204 of the battery cell 20, that is, the projection of the first protective member 181 in the first direction Z partially covers the projection of the fourth wall 204 of the battery cell 20 in the first direction Z.

[0246] In some embodiments, a plurality of first protective members 181 are spaced apart, and in the third direction X, the fourth walls 204 of two adjacent battery cells 20 partially abut against the same first protective member 181. That is, in the first direction Z, the projection of the first protective member 181 at least partially overlaps with the projection of the fourth wall 204 of the battery cell 20. The plurality of first protective members 181 are spaced apart and abut against the fourth walls 204 of two adjacent battery cells 20. The length of each first protective member 181 in the third direction X only needs to be sufficient to abut against the fourth walls 204 of two adjacent battery cells 20, thereby saving the number of first protective members 181 and reducing the overall weight of the battery device 10, thus improving its lightweight nature.

[0247] In some embodiments, continue to refer to Figure 13 The battery device 10 includes a plurality of battery cell assemblies 14. The protective member 18 may include a plurality of first protective members 181 and two second protective members 182 arranged along the third direction X. The plurality of first protective members 181 are spaced apart. In the third direction X, the fourth wall 204 portions of two adjacent battery cells 20 abut against the same first protective member 181. The two second protective members 182 abut against the outermost fourth wall 204 of the plurality of battery cells 20 along the third direction X.

[0248] It should be understood that there may be one or more first protective elements 181, and the number can be set according to actual needs. For example, the first protective element 181 may be provided on the mutually close portions of the fourth walls 204 of all two adjacent battery cells 20, or the first protective element 181 may be provided selectively on the mutually close portions of the fourth walls 204 of some adjacent battery cells 20.

[0249] In this embodiment, a second protective member 182 is provided on the outermost fourth wall 204 of a plurality of battery cells 20 in the third direction X. The same first protective member 181 is provided on the parts of the fourth walls 204 of two adjacent battery cells 20 that are close to each other. That is, the parts of the fourth wall 204 of each battery cell 20 that are close to both ends in the third direction X are provided with protective members 18, thereby limiting the displacement of each battery cell 20 in the first direction Z, so that each battery cell 20 has good stability, thereby improving the overall structural stability of the battery device 10.

[0250] The number of protective components 18 can be flexibly adjusted according to actual needs. For example, Figure 13 As shown, the number of protective members 18 can be the same as the number of limiting members 16, and the positions of the protective members 18 are opposite to those of the limiting members 16. That is, if the limiting member 16 is disposed on the second wall 202 of the battery cell 20, then the protective member 18 is disposed on the portion of the fourth wall 204 of the battery cell 20 adjacent to the second wall 202. Alternatively, if the limiting member 16 is disposed between the adjacent second walls 202 of two adjacent battery cells 20 along the third direction X, then the protective member 18 is disposed on the portion of the fourth walls 204 of the two adjacent battery cells 20 that are close to each other, and is located between the fourth wall 204 and the cover 12.

[0251] In some embodiments, the protective member 18 and the limiting member 16, whose projections in the first direction Z overlap, are connected. For example, the protective member 18 and the corresponding limiting member 16 can be connected by means of adhesive bonding, heat fusion, welding, snap-fitting, bolts, and screws.

[0252] In some embodiments, the protective member 18 and the limiting member 16, whose projections in the first direction Z overlap, can also be integrally formed. For example, the protective member 18 and the limiting member 16 can be integrally formed by extrusion, casting, stamping, 3D printing, or other methods.

[0253] In some embodiments, the protective member 18 has a flow channel through which a heat exchange medium passes to regulate the temperature of the battery cell assembly 14.

[0254] In some embodiments, the frame 11 can be configured as a hollow structure. Configuring the frame 11 as a hollow structure can reduce the weight of the battery device 10, achieving a lightweight design. Furthermore, configuring the frame 11 as a hollow structure facilitates connection with the support assembly 15, the limiting member 16, or the base plate 13 via connectors.

[0255] In some embodiments, the base plate 13 may be disposed on the side of the frame 11 away from the cover 12.

[0256] In this embodiment, the base plate 13 is disposed on the side of the frame 11 away from the cover 12. The battery cell 20 can be supported by the frame 11 or the support assembly 15, thereby reducing the load on the battery cell 20 from the base plate 13, reducing wear on the base plate 13, and thus improving the performance of the battery device 10. Furthermore, the increased space between the base plate 13 and the battery cell 20 further improves the discharge speed of the battery cell exhaust. When the battery device 10 is subjected to external impacts or other problems, the base plate 13 can also protect the battery cell 20, reducing the risk of damage to the battery cell 20, thereby improving the performance of the battery device 10.

[0257] In some embodiments, such as Figure 14 As shown, Figure 14 A schematic diagram of the structure of the base plate 13 according to an embodiment of this application is shown. Multiple weak areas 131 may also be provided on the base plate 13. These weak areas 131 are correspondingly provided with the pressure relief mechanisms 21 of the multiple battery cells 20. The weak areas 131 are configured to be damaged when the pressure or temperature inside the battery device 10 reaches a predetermined threshold.

[0258] It should be understood that the weak area 131 is a relatively thin area in the base plate 13. The weak area 131 can be integrally formed with the base plate 13 through processing methods such as injection molding, thereby reducing the complexity of installing additional pressure relief components, further reducing the weight of the base plate 13, and improving the lightweighting of the battery device 10.

[0259] The base plate 13 of this application embodiment is provided with a plurality of weak areas 131, and the plurality of weak areas 131 are correspondingly provided with the pressure relief mechanism 21 of the plurality of battery cells 20. That is, in the first direction Z, each battery cell 20 pressure relief mechanism 21 is directly opposite a weak area 131, so that in the event of thermal runaway of any battery cell 20, the emissions inside the battery cell 20 can be preferentially discharged from the corresponding weak area 131, further accelerating the discharge speed of the emissions.

[0260] The base plate 13 of this application embodiment is provided with a plurality of weak areas 131, and each weak area 131 is arranged opposite to the pressure relief mechanism 21 of the corresponding battery cell 20, which can further accelerate the speed at which the thermally runaway battery cell 20 discharges internal emissions and improve the reliability of the battery device 10.

[0261] In some embodiments, on a plane perpendicular to the thickness direction of the base plate 13, the orthographic projections of the pressure relief mechanisms 21 of multiple battery cells 20 are respectively located within the orthographic projections of their corresponding weak areas 131. That is, each weak area 131 is directly opposite to the pressure relief mechanism 21 of its corresponding battery cell 20, and the area of ​​the weak area 131 is larger than the area of ​​the pressure relief mechanism 21. In this way, the emissions inside the battery cell 20 that has experienced thermal runaway can be directly discharged from the corresponding weak area 131 through the pressure relief mechanism 21, reducing the risk of emissions accumulating inside the battery device 10 due to poor discharge caused by the small size of the weak area 131, which could lead to insulation failure of the battery cell 20.

[0262] In some embodiments, such as Figure 12 As shown, the distance between the first wall 201 of the battery cell 20 and the base plate 13 is L, where L satisfies 5mm≤L≤20mm.

[0263] It should be understood that the first wall 201 of the battery cell 20 can refer to the wall of the battery cell 20 facing the base plate 13, and the first wall 201 is perpendicular to the first direction Z.

[0264] In this embodiment, the distance L between the first wall 201 and the base plate 13 is greater than or equal to 5 mm, which allows a certain discharge space to be formed between the first wall 201 and the base plate 13, so that the emissions inside the battery cell 20 that has experienced thermal runaway can be quickly discharged to the outside of the battery device 10 through the discharge space; the distance L between the first wall 201 and the base plate 13 is less than or equal to 20 mm, which allows the emissions inside the battery cell 20 to be discharged quickly while improving the space utilization of the battery device 10, thereby increasing the energy density of the battery device 10.

[0265] In some embodiments, the distance L between the first wall 201 of the battery cell 20 and the base plate 13 in this application embodiment can also be set to other values. For example, the value of L can be any one of the following values ​​or between any two of the following values: 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 16.5mm, 17mm, 17.5mm, 18mm, 18.5mm, 19mm, 19.5mm, 20mm.

[0266] In some embodiments, the base plate 13 and the frame 11 are connected by adhesive bonding or thermal fusion; and / or, the cover 12 and the frame 11 are connected by adhesive bonding or thermal fusion.

[0267] In this embodiment of the application, the base plate 13 and the frame 11 are connected by adhesive bonding or hot-melt bonding. When the base plate 13 cracks or is damaged due to problems such as being hit by stones during use and needs to be replaced, the connection between it and the frame 11 can be broken more quickly by secondary hot-melt bonding or other methods, and then reconnected by adhesive bonding or hot-melt bonding.

[0268] It should be understood that the connection between the cover 12 and the frame 11 is also similar, through adhesive bonding or hot-melt bonding. When the cover 12 needs to be replaced due to cracking or damage caused by stones or other issues during use, the connection between it and the frame 11 can be broken by secondary hot-melt bonding or other methods, and a new cover 12 can be replaced and hot-melt / adhesively bonded to the frame 11. This facilitates disassembly without damaging the undamaged frame 11.

[0269] Furthermore, the cover 12 and the base plate 13 can be made of plastic or metal. For example, the cover 12 and the base plate 13 can be made of plastic, thereby achieving a lightweight design for the battery device 10. It should be understood that the cover 12 and the base plate 13 can also be made of other materials, such as metal or composite materials. For example, the cover 12 and / or the base plate 13 can also be sheet metal, thereby improving the structural strength of the battery device 10.

[0270] In this embodiment, the cover 12 and the frame 11 are connected by adhesive bonding or thermal fusion; and / or, the base plate 13 and the frame 11 are connected by adhesive bonding or thermal fusion. This improves the connection strength between the two components and allows for quick replacement of the faulty component without damaging other components in the event of a failure in one component. This improves the utilization rate of the battery device 10 and further enhances its performance. Furthermore, adhesive bonding or thermal fusion enables sealing between the cover 12 and the frame 11, and between the base plate 13 and the frame 11, without the need for additional structures such as sealing rings. This improves the sealing performance of the battery device 10 and simplifies its structure.

[0271] This application embodiment also provides an electrical device, including the battery device 10 in any of the above embodiments, the battery device 10 being used to provide electrical energy to the electrical device. Specifically, the electrical device can be the above... Figure 1 The vehicle 1 shown can also be any electrical device that uses the battery device 10.

[0272] In some implementations, the electrical equipment can be a vehicle, a ship, or a spacecraft.

[0273] According to some embodiments of this application, see Figures 2 to 14This application provides a battery device 10, including a frame 11, a cover 12, a base plate 13, a battery cell assembly 14, and a support assembly 15. Specifically, the frame 11 has a first opening 1101 and a second opening 1102 on both sides along the first direction Z, and the first opening 1101 and the second opening 1102 are interconnected; the cover 12 is connected to the frame 11 and closes the first opening; the bottom plate 13 is connected to the frame 11 and closes the second opening 1102, and the frame 11, the cover 12 and the bottom plate 13 together define a receiving space; the battery cell assembly 14 is received in the receiving space, and the battery cell assembly 14 includes a plurality of battery cells 20 arranged along the second direction Y, and the battery cell 20 includes a pressure relief mechanism 21, which is disposed on the first wall 201 of the battery cell 20, and the second direction Y is perpendicular to the first direction Z; the support assembly 15 is received in the receiving space, and the support assembly 15 is connected to the frame 11, and the first wall 201 of each battery cell 20 partially overlaps the surface of the support assembly 15 away from the bottom plate 13 to form a gap space 101 between the first wall 201 and the bottom plate 13, and the pressure relief mechanism 21 of each battery cell 20 is disposed opposite to the gap space 101.

[0274] The support assembly 15 includes a first support member 151 and a second support member 152. The first support member 151 is connected to the side of the frame 11 near the battery cell 20. The first wall 201 of the battery cell 20 partially rests on the surface of the first sub-support member 1521 away from the bottom plate 13. The second support member 152 rests on the surface of the first support member 151 away from the bottom plate 13 and is connected to the first support member 151. The first wall 201 of each battery cell 20 partially rests on the surface of the second support member 152 away from the bottom plate 13.

[0275] The second support member 152 has a flow channel 100 through which a heat exchange medium passes, which is used to regulate the temperature of the battery cell assembly 14.

[0276] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A frame (11) having a first opening (1101) and a second opening (1102) on both sides along a first direction, wherein the first opening (1101) and the second opening (1102) are connected to each other. A cover (12) is connected to the frame (11) and closes the first opening (1101); A base plate (13) is connected to the frame (11) and closes the second opening (1102). The frame (11), the cover (12), and the base plate (13) together define an accommodating space. A battery cell assembly (14) is housed in the housing space. The battery cell assembly (14) includes a plurality of battery cells (20) arranged along a second direction. Each battery cell (20) includes a pressure relief mechanism (21) disposed on a first wall (201) of the battery cell (20). The second direction is perpendicular to the first direction. A support assembly (15) is housed in the receiving space and is connected to the frame (11). The first wall (201) of each battery cell (20) is partially laid on the surface of the support assembly (15) away from the base plate (13) to form a gap space between the first wall (201) and the base plate (13). The pressure relief mechanism (21) of each battery cell (20) is disposed opposite to the gap space.

2. The battery device according to claim 1, characterized in that, The support assembly (15) includes a first support member (151) connected to the side of the frame (11) near the battery cell (20), and the first wall (201) of the battery cell (20) partially rests on the surface of the first support member (151) away from the base plate (13).

3. The battery device according to claim 2, characterized in that, The first support member (151) and the frame (11) are integrally formed.

4. The battery device according to claim 2, characterized in that, The battery device includes a plurality of battery cell assemblies (14) arranged along a third direction; The support assembly (15) further includes a plurality of second support members (152) extending along the second direction. The plurality of second support members (152) are spaced apart along the third direction. The plurality of second support members (152) are respectively connected to the frame (11). The first wall (201) of the battery cell (20) is partially supported on the surface of the second support member (152) away from the base plate (13). The third direction is perpendicular to the first direction and the second direction.

5. The battery device according to claim 4, characterized in that, The second support member (152) includes at least one first sub-support member (1521), the first sub-support member (1521) is connected to the frame (11) at both ends along the second direction, the first sub-support member (1521) is spaced apart from the frame (11) on both sides along the third direction, and the first wall (201) of the battery cells (20) of two adjacent battery cell assemblies (14) along the third direction abuts against the same first sub-support member (1521).

6. The battery device according to claim 5, characterized in that, The second support member (152) further includes two second sub-support members (1522), which are respectively located on the outermost side of the plurality of first sub-support members (1521) along the third direction and abut against the first wall (201) of the battery cell (20) of the battery cell assembly (14) located on the outermost side of the third direction. The two second sub-support members (1522) are respectively mounted on the surface of the first support member (151) away from the base plate (13) and are respectively connected to the first support member (151).

7. The battery device according to claim 5, characterized in that, In the second direction and / or the third direction, the adjacent walls of two adjacent battery cells (20) are bonded together.

8. The battery device according to claim 4, characterized in that, The second support member (152) has a flow channel (100) through which a heat exchange medium passes to regulate the temperature of the battery cell assembly (14).

9. The battery device according to claim 1, characterized in that, The base plate (13) is located on the side of the frame (11) away from the cover (12).

10. The battery device according to claim 1, characterized in that, The base plate (13) is provided with a plurality of weak areas (131), and the plurality of weak areas (131) are provided in correspondence with the pressure relief mechanism (21) of the plurality of battery cells (20). The weak areas (131) are configured to be destroyed when the pressure or temperature inside the battery device reaches a predetermined threshold.

11. The battery device according to claim 1, characterized in that, The distance L between the first wall (201) of the battery cell (20) and the base plate (13) is: 5mm≤L≤20mm.

12. The battery device according to claim 1, characterized in that, The battery device further includes a limiting member (16) extending along the second direction, the limiting member (16) being received in the receiving space, the limiting member (16) abutting against at least a portion of the second wall (202) of the battery cell assembly (14), wherein the limiting member (16) is connected to the frame (11), and the second wall (202) is perpendicular to the first wall (201).

13. The battery device according to claim 12, characterized in that, The battery device includes a plurality of battery cell assemblies (14) arranged along a third direction and a plurality of limiting members (16) arranged along a third direction; Two of the plurality of limiting members (16) are located on the outermost side of the plurality of battery cell assemblies (14) in the third direction, and respectively abut against the outermost second wall (202) of the battery cell (20) of the two outermost battery cell assemblies (14) along the third direction. In the third direction, the adjacent second walls (202) of the battery cells (20) of two adjacent battery cell assemblies (14) abut against the same limiting member (16). The third direction is perpendicular to the first direction and the second direction.

14. The battery device according to claim 13, characterized in that, The limiting member (16) and the support assembly (15) whose projections in the first direction overlap are interconnected.

15. The battery device according to claim 12, characterized in that, The limiting member (16) extends along the first direction, and in the first direction, the ratio K1 of the height of the limiting member (16) to the height of the battery cell (20) is: 0.5≤K1≤1.

16. The battery device according to claim 12, characterized in that, The limiting member (16) has a flow channel (100) for the passage of heat exchange medium, which is used to regulate the temperature of the battery cell assembly (14).

17. The battery device according to claim 12, characterized in that, The limiting member (16) is connected to the frame (11) by adhesive bonding or by a connector; and / or The limiting member (16) is connected to the battery cell assembly (14) by adhesive bonding.

18. The battery device according to claim 12, characterized in that, The limiting member (16) is at least partially located between the frame (11) and the battery cell assembly (14) adjacent to the frame (11), and the top of the limiting member (16) along the first direction is higher than the top of the portion of the frame (11) adjacent to the limiting member (16) along the first direction.

19. The battery device according to claim 18, characterized in that, In the first direction, the ratio of the height of the limiting member (16) to the height of the frame (11) is K2: 1.25≤K2≤5.

20. The battery device according to claim 12, characterized in that, The battery device further includes a strap (17) that surrounds the battery cell assembly (14), the strap (17) being located on the side of the limiting member (16) away from the base plate (13), and the strap (17) and the limiting member (16) being spaced apart in the first direction.

21. The battery device according to any one of claims 1 to 20, characterized in that, The battery cell (20) has a third wall (203), which is adjacent to the first wall (201) and perpendicular to the second direction. The third wall (203) is the wall with the largest area in the battery cell (20).

22. The battery device according to any one of claims 1 to 20, characterized in that, The base plate (13) is connected to the frame (11) by adhesive bonding or thermal fusion; and / or The cover (12) and the frame (11) are connected by adhesive bonding or hot-melt bonding.

23. The battery device according to any one of claims 1 to 20, characterized in that, The battery cell assembly (14) is connected to the cover (12).

24. An electrical appliance, characterized in that, Includes a battery device according to any one of claims 1 to 23, the battery device being used to provide electrical energy.

Images