Battery device and electric device

Abstract

The application relates to the battery technical field and provides a battery device and a power utilization device. The battery device comprises a box body, a first battery monomer assembly, a second battery monomer assembly, a partition beam and an ejection cooperation structure. The first battery monomer assembly and the second battery monomer assembly are arranged in the box body. The partition beam is arranged in the box body and located between the first battery monomer assembly and the second battery monomer assembly. The partition beam has a first surface facing the first battery monomer assembly and a second surface facing the second battery monomer assembly. The ejection cooperation structure is arranged in the partition beam along a height direction. The ejection cooperation structure has a first side surface facing the first battery monomer assembly and a second side surface facing the second battery monomer assembly. At least part of the first side surface is flush with or recessed in the first surface, and / or at least part of the second side surface is flush with or recessed in the second surface. The application can improve the insulation performance of the battery device, thereby improving the reliability of the battery device.

Description

Technical Field

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

[0002] Battery devices are used to store and release electrical energy, and are widely used in new energy vehicles, energy storage systems, and other fields. In practical applications, sufficient electrical clearance must be maintained between the individual battery cells and the metal casing structure within the battery device to ensure insulation performance. However, when the distance between them is too small, it can easily lead to insufficient electrical clearance, posing risks such as partial discharge and insulation breakdown, thus affecting the reliability of the battery device. Utility Model Content

[0003] In view of the above-mentioned technical problems, the purpose of this application is to provide a battery device and an electrical device, which aims to solve the problem of poor reliability of existing battery devices.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0005] In a first aspect, embodiments of this application provide a battery device, including:

[0006] Box;

[0007] The first and second battery cell assemblies are housed inside the casing.

[0008] A partition beam is disposed inside the box and located between the first battery cell assembly and the second battery cell assembly. The partition beam has a first surface facing the first battery cell assembly and a second surface facing the second battery cell assembly.

[0009] The ejector fitting structure is inserted through the partition beam along the height direction. The ejector fitting structure has a first side facing the first battery cell assembly and a second side facing the second battery cell assembly. At least a portion of the first side is flush with or recessed in the first surface, and / or at least a portion of the second side is flush with or recessed in the second surface.

[0010] In the above technical solution, by ensuring that at least a portion of the side of the ejector structure on the partition beam inside the housing does not protrude beyond the surface of the corresponding side of the partition beam, local protrusions can be reduced, the distance between the structure and the battery cell assembly can be increased, thereby improving insulation performance, reducing the risk of partial discharge and insulation breakdown, and thus improving the reliability of the battery device.

[0011] In some embodiments, a portion of the first side is flush with or recessed into the first surface, and another portion of the first side protrudes from the first surface;

[0012] And / or, a portion of the second side is flush with or recessed into the second surface, while another portion of the second side protrudes from the second surface.

[0013] In the above technical solution, by ensuring that some sides of the ejector assembly structure do not protrude from the surface of the corresponding side of the separator beam, local protrusions can be reduced, the distance between the structure and the battery cell assembly can be increased, thereby improving insulation performance, reducing the risk of partial discharge and insulation breakdown, and thus improving the reliability of the battery device.

[0014] In some embodiments, the housing includes a base plate, and a first battery cell assembly, a second battery cell assembly, and a partition beam are disposed on the base plate.

[0015] The ejection mating structure includes a first part and a second part distributed along the height direction. The first part is disposed between the base plate and the second part. The first part has a first sub-side facing the first battery cell assembly and a second sub-side facing the second battery cell assembly. The first side includes the first sub-side, and the second side includes the second sub-side. The first sub-side is flush with or recessed in the first surface, and / or the second sub-side is flush with or recessed in the second surface.

[0016] In the above technical solution, by ensuring that at least one sub-side of the top-out mating structure near the lower part of the bottom plate (first part) does not protrude from the surface of the corresponding side of the partition beam, the local protrusion between the battery cell assembly and the top-out mating structure in the bottom area is effectively avoided, increasing the electrical clearance and creepage distance at that location, thereby improving the electrical insulation reliability of the battery device.

[0017] In some embodiments, the second portion has a third sub-side facing the first battery cell assembly and a fourth sub-side facing the second battery cell assembly, the first side including the third sub-side, the second side including the fourth sub-side, at least a portion of the third sub-side being flush with or recessed in the first surface, and / or, at least a portion of the fourth sub-side being flush with or recessed in the second surface.

[0018] In the above technical solution, by further ensuring that at least a portion of at least one sub-side of the upper region (second part) of the ejector fitting structure does not protrude beyond the surface of the corresponding side of the separator beam, the local protrusions caused by the ejector fitting structure are reduced throughout the entire height direction. This design not only reduces the problem of reduced electrical clearance caused by interference from the protruding structure in the upper region, but also works synergistically with the lower optimization to ensure that sufficient spacing and creepage distance are maintained between the battery cell assembly and the ejector fitting structure along the entire height, thereby improving the overall insulation performance of the battery device.

[0019] In some embodiments, the second portion has an ejector mating end, and the third sub-side includes a third protruding surface that protrudes from the first surface and extends from the end face of the ejector mating end toward the first portion.

[0020] And / or, the second part has an ejector mating end, and the fourth sub-side includes a fourth protruding surface that protrudes from the second surface and extends from the end face of the ejector mating end toward the first part.

[0021] In the above technical solution, a protruding surface is provided at the ejection mating end in the upper region (second part) of the ejection mating structure. This protruding design can increase the force-bearing area and structural strength of the ejection mating end, thereby improving the load-bearing capacity and stability of the housing during the ejection demolding process, reducing the risk of deformation or damage, and thus improving the reliability of the battery device.

[0022] In some embodiments, in the height direction, the ratio of the height of the third protruding surface to the height of the first side surface is 20% to 50%;

[0023] And / or, in the height direction, the ratio of the height of the fourth protruding surface to the height of the second side surface is 20% to 50%.

[0024] In the above technical solution, by limiting the height of the protruding surface of the upper region (second part) of the ejection mating structure, while ensuring that the ejection mating end has sufficient force-bearing area and structural strength to reliably complete the demolding of the box, the extension range of the local protrusion is effectively limited, thereby increasing the flat surface of the lower region (first part) of the ejection mating structure as much as possible, improving the electrical clearance and creepage distance between this area and the battery cell assembly, and thus improving the electrical insulation reliability.

[0025] In some embodiments, the first part has a connecting end connected to the base plate, and the second part has an ejector mating end. The cross-sectional area of ​​the connecting end in a first direction is greater than the cross-sectional area of ​​the ejector mating end in the first direction, and the first direction is perpendicular to the height direction.

[0026] In the above technical solution, by making the cross-sectional area of ​​the connecting end of the ejection mating structure larger than that of the ejection mating end, a bottom-reinforced structural form is formed, which improves the connection strength and force transmission efficiency between it and the bottom plate of the housing. This design ensures that the ejection force can be stably and reliably transmitted from the ejection mating structure to the entire housing, thereby improving the stability of the housing during the ejection demolding process, reducing the risk of deformation or damage, and thus improving the reliability of the battery device.

[0027] In some embodiments, the partition beam has a top surface, and at least a portion of the end face of the ejector mating end protrudes from the top surface.

[0028] In the above technical solution, by making at least a portion of the ejector end protrude beyond the top surface of the separator beam, the docking accuracy and contact reliability of the ejector structure and the ejector pins of the housing mold are improved without interfering with the electrical clearance between the battery cell assembly and the side of the ejector structure. This design ensures that the mold ejector pins can act quickly and accurately on the ejector structure, avoiding demolding failure, housing deformation, or structural damage caused by positioning deviations or poor contact, thereby improving the yield rate and production efficiency of housing molding.

[0029] In some embodiments, the thickness of the partition beam gradually decreases along the height direction from bottom to top.

[0030] In the above technical solution, by making the bottom thickness of the partition beam greater than the top thickness, the structural strength of the bottom of the partition beam can be strengthened, and its connection strength with the box and force transmission efficiency can be improved, which is conducive to improving the stability and reliability of the box during the ejection and demolding process.

[0031] In some embodiments, at least a portion of at least one of the first surface and the second surface is provided with a first insulating layer.

[0032] In the above technical solution, by setting an insulating layer on the surface of the separator beam, the insulation performance between it and the battery cell assembly can be improved.

[0033] In some embodiments, at least a portion of at least one of the first side and the second side is provided with a second insulating layer.

[0034] In the above technical solution, by setting an insulating layer on the side of the top-out mating structure, the insulation performance between the structure and the battery cell assembly can be improved.

[0035] In some embodiments, multiple ejector fitting structures are provided at intervals along the length direction of the partition beam. The multiple ejector fitting structures include a first ejector fitting structure and a second ejector fitting structure. The two ends of the partition beam are respectively provided with a first ejector fitting structure, and the second ejector fitting structure is provided between the two ends of the first ejector fitting structure. The height of the first ejector fitting structure is greater than the height of the second ejector fitting structure.

[0036] In the above technical solution, by setting multiple ejection mating structures along the length of the partition beam, and ensuring that the height of the first ejection mating structure at both ends is greater than the height of the second ejection mating structure in the middle, the optimized distribution of demolding support is achieved. This design provides stronger ejection stiffness and support force at the ends of the partition beam, effectively suppressing warping deformation of the casing during demolding, improving the molding accuracy of the casing, and thus enhancing the reliability of the battery device.

[0037] In some embodiments, the ejection mating structure includes a plate and an ejector pin. The plate and the partition beam are integrally formed. The plate has a fifth sub-side facing the first battery cell assembly and a sixth sub-side facing the second battery cell assembly. The fifth sub-side is flush with the first surface, and the sixth sub-side is flush with the second surface.

[0038] The ejector pin is inserted into the plate along the height direction. The ejector pin has a seventh sub-side facing the first battery cell assembly and an eighth sub-side facing the second battery cell assembly. At least a portion of the seventh sub-side protrudes from the first surface, and at least a portion of the eighth sub-side protrudes from the second surface.

[0039] The first side includes the fifth and seventh sub-sides, and the second side includes the sixth and eighth sub-sides.

[0040] In the above technical solution, the plate with the ejector mechanism is integrally formed onto the separator beam, and its side surface is flush with the corresponding side surface of the separator beam. This reduces local protrusions, increases the distance between the plate and the battery cell assembly, thereby improving insulation performance and reducing the risks of partial discharge and insulation breakdown. By having at least a portion of the ejector pin protrude from the corresponding side surface of the separator beam, the force-bearing area and structural strength of the ejector pin are increased, thereby improving the load-bearing capacity and stability of the housing during ejection and demolding, reducing the risk of deformation or damage, and ultimately improving the reliability of the battery device.

[0041] In some embodiments, multiple ejector fitting structures are provided at intervals along the length direction of the partition beam. The multiple ejector fitting structures include a first ejector fitting structure and a second ejector fitting structure. The two ends of the partition beam are respectively provided with a first ejector fitting structure, and the second ejector fitting structure is provided between the two ends of the first ejector fitting structure. The first ejector fitting structure includes a first ejector pin, and the second ejector fitting structure includes a second ejector pin. The height of the first ejector pin is greater than the height of the second ejector pin.

[0042] In the above technical solution, by setting multiple ejector pins along the length of the partition beam, and ensuring that the height of the ejector pins at both ends is greater than that of the ejector pin in the middle, the optimized distribution of demolding support is achieved. This design provides stronger ejection stiffness and support force at the ends of the partition beam, effectively suppressing warping deformation of the casing during demolding, improving the molding accuracy of the casing, and thus enhancing the reliability of the battery device.

[0043] In some embodiments, the box body and the partition beam are integrally formed structures;

[0044] And / or, the partition beam and the top-mounted fitting structure are integrally formed.

[0045] In the above technical solution, by designing the housing, the partition beam, and the partition beam and the top-mounted assembly into a single integrated structure, the connection interfaces in traditional split structures can be avoided, improving the overall structural strength of the housing and thus enhancing the reliability of the battery device. Furthermore, this integrated structure simplifies the manufacturing process and improves production efficiency.

[0046] Secondly, embodiments of this application also provide an electrical device, including: the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0047] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0050] Figure 2 This is a schematic diagram of the structure of the battery device provided in the embodiments of this application;

[0051] Figure 3 This is a side view of the internal partition beam of the box provided in an embodiment of this application;

[0052] Figure 4 A schematic diagram of the ejection mating structure formed on the partition beam according to an embodiment of this application;

[0053] Figure 5 This is a schematic diagram of the structure of the box provided in an embodiment of this application;

[0054] Figure 6 for Figure 5 A magnified view of a portion at point C;

[0055] Figure 7 This is a side view of the ejection mating structure provided in an embodiment of this application;

[0056] Figure 8 A cross-sectional view of the ejection mating structure provided in an embodiment of this application;

[0057] Figure 9This is a structural sectional view of the partition beam provided in an embodiment of this application;

[0058] Figure 10 A schematic diagram of the ejection mating structure provided in the embodiments of this application;

[0059] Figure 11 This is a schematic diagram of the distribution of the ejection mating structure provided in an embodiment of this application.

[0060] The following are the labeling elements in the figure:

[0061] 1000, Vehicle; 100, Battery unit; 200, Controller; 300, Motor;

[0062] 11. Box body; 111. Frame; 112. Base plate;

[0063] 12. Battery cell; 13. First battery cell assembly; 14. Second battery cell assembly;

[0064] 15. Dividing beam; 151. First surface; 152. Second surface; 153. Top surface;

[0065] 16. Ejection mating structure; 161. First side surface; 162. Second side surface;

[0066] 163. First part; 1631. First sub-side; 1632. Second sub-side; 1633. Connecting end;

[0067] 164. Second part; 1641. Third sub-side surface; 16411. Third projecting surface;

[0068] 1642. Fourth protruding surface; 1643. Ejecting mating end;

[0069] 165. First ejection mating structure; 166. Second ejection mating structure;

[0070] 167. Plate body; 1671. Fifth side view; 168. Ejector pin; 1681. Seventh side view;

[0071] 1691. First thimble; 1692. Second thimble; 1693. First plate; 1694. Second plate. Detailed Implementation

[0072] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0073] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0074] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

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

[0076] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0077] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0078] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0079] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0080] In new energy vehicles and energy storage systems, air-cooled battery devices are widely used due to their advantages such as simple structure, low cost, and convenient maintenance. To improve heat dissipation efficiency, air-cooled battery devices often employ a design with battery cells without a blue film (i.e., exposed aluminum or steel casing) to enhance heat conduction between the battery cell and the cooling airflow. However, removing the blue film directly exposes the metal casing of the battery cell, reducing its electrical insulation performance with the metal casing and imposing higher requirements on electrical clearances.

[0081] In existing technologies, the metal casing of battery devices is mostly integrally formed using die casting to achieve high structural strength and good sealing performance. During the die casting process, ejector pin structures are provided on the mold to facilitate demolding, and correspondingly, columnar ejection structures are formed on the partition beam inside the casing to cooperate with the ejector pins. This ejection structure protrudes outward along the thickness direction of the partition beam. When battery cells without blue film are arranged close to the partition beam, such local protrusions significantly reduce the distance between the battery cells and the casing structure, resulting in actual electrical clearances that are lower than the specifications required. This can easily lead to risks such as partial discharge and insulation breakdown, affecting the reliability of the battery device.

[0082] To address this issue, this application provides a battery device that effectively avoids the problem of partially reducing the distance between the battery cell and the housing structure caused by the protrusion of the ejector mechanism on at least one side of the ejector mechanism on the corresponding side of the housing, by designing the ejector mechanism on at least one side of the ejector mechanism to not protrude from the surface of the corresponding side of the housing. This structure, while satisfying the housing demolding function, ensures sufficient electrical clearance between the battery cell and the housing structure, improves insulation performance and resistance to electrical breakdown, reduces the risk of partial discharge, and thus improves the reliability of the battery device.

[0083] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage systems that use the battery device as an energy storage element. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0084] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0085] Reference Figure 1 As shown, vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of vehicle 1000. The battery device 100 can be used to power vehicle 1000; for example, the battery device 100 can serve as the operating power source for vehicle 1000. Vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of vehicle 1000 during starting, navigation, and driving.

[0086] In some embodiments, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0087] Reference Figure 2 As shown, the battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells 12, which are connected in series, parallel, or mixed connections via a busbar.

[0088] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 12.

[0089] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 12 into an independent module. As an example, the battery module can be formed by bundling multiple battery cells 12 together with cable ties.

[0090] In some embodiments, the battery device may be a battery pack, which includes a housing 11 and one or more battery cell assemblies housed in the housing 11.

[0091] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 11 by fixing the battery module in the housing 11.

[0092] As an example, the battery cell assembly can also be housed in the housing 11 by directly fixing multiple battery cells 12 to the housing 11.

[0093] As an example, the housing 11 may include a first housing and a second housing. The first housing and the second housing are fastened together to form a closed space inside the housing 11 to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0094] As an example, the housing 11 may include a top cover, a frame 111, and a bottom plate 112. The top cover and the bottom plate 112 are respectively connected to the frame 111, so that the interior of the housing 11 forms a closed space to accommodate the battery cell assembly.

[0095] In some embodiments, the housing 11 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 11 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 11 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0096] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0097] In this embodiment, the battery cell 12 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.

[0098] In some embodiments, refer to Figures 2 to 11As shown, this application provides a battery device, including: a housing 11, a first battery cell assembly 13, a second battery cell assembly 14, a partition beam 15, and an ejection mating structure 16. The first battery cell assembly 13 and the second battery cell assembly 14 are disposed within the housing 11; the partition beam 15 is disposed within the housing 11 and located between the first battery cell assembly 13 and the second battery cell assembly 14, and the partition beam 15 has a first surface 151 facing the first battery cell assembly 13 and a second surface 152 facing the second battery cell assembly 14; the ejection mating structure 16 passes through the partition beam 15 along the height direction Z, and the ejection mating structure 16 has a first side surface 161 facing the first battery cell assembly 13 and a second side surface 162 facing the second battery cell assembly 14. At least a portion of the first side surface 161 is flush with or recessed from the first surface 151, and / or at least a portion of the second side surface 162 is flush with or recessed from the second surface 152.

[0099] The housing 11 can be formed using a die-casting process, possessing good structural strength and sealing performance, and serves as the main load-bearing structure of the battery device. The housing 11 can be made of metals such as steel or aluminum.

[0100] The first battery cell assembly 13 and the second battery cell assembly 14 may each include a plurality of battery cells 12 arranged in an array. Optionally, the battery cells 12 may be designed without a blue film cover, exposing the outer casing of the battery cell 12 to improve heat dissipation efficiency.

[0101] The partition beam 15 is an intermediate beam structure disposed within the housing 11, located between the first battery cell assembly 13 and the second battery cell assembly 14. It divides the interior of the housing 11 into accommodating spaces capable of accommodating the first battery cell assembly 13 and the second battery cell assembly 14 respectively. The partition beam 15 has a first surface 151 facing the first battery cell assembly 13 and a second surface 152 facing the second battery cell assembly 14. The first surface 151 and the second surface 152 are the two side surfaces of the partition beam 15 along the thickness direction Y. Furthermore, the partition beam 15, disposed within the housing 11, also improves the overall structural strength of the housing 11. The material of the partition beam 15 can be the same as or different from that of the housing 11. Optionally, the material of the partition beam 15 can be aluminum, aluminum alloy, stainless steel, etc., which have high strength.

[0102] In some embodiments, refer to Figure 3 and Figure 5 As shown, the partition beam 15 is connected to the bottom plate 112 of the box body 11, and the two ends of the partition beam 15 along the length direction X are respectively connected to the frame 111 of the box body 11.

[0103] In some embodiments, the partition beam 15 is provided with a first reinforcing mesh inside to improve structural strength.

[0104] like Figures 3 to 9 As shown, the ejector fitting structure 16 is installed along the height direction Z on the partition beam 15. It abuts against the ejector pin end face of the mold after the housing 11 is die-cast. The ejector pins of the mold apply a pushing force to the ejector fitting structure 16, thereby ejecting the entire housing 11 from the mold cavity via the partition beam 15, achieving demolding of the housing 11. This ejector fitting structure 16 can be columnar, block-shaped, or other shapes. Its outer surface along the thickness direction Y does not protrude beyond the corresponding outer surface of the partition beam 15, avoiding localized protrusions and increasing the insulation distance between the structure and the battery cell assembly. Specifically, the ejector fitting structure 16 has a first side 161 facing the first battery cell assembly 13 and a second side 162 facing the second battery cell assembly 14. The first side 161 and the second side 162 are the two sides of the ejector fitting structure 16 along the thickness direction Y. At least a portion of at least one of the first side 161 and the second side 162 does not protrude from the surface of the separator beam 15 on the corresponding side, that is, at least a portion of the first side 161 does not protrude from the first surface 151 of the separator beam 15, and / or, at least a portion of the second side 162 does not protrude from the second surface 152 of the separator beam 15. The term "not protruding" as used herein can include flush with or recessed.

[0105] In some embodiments, the interior of the ejector fitting structure 16 is provided with a second reinforcing mesh to improve structural strength.

[0106] In some embodiments, refer to Figures 2 to 4 As shown, the box body 11 and the partition beam 15 are integrally formed structures; and / or, the partition beam 15 and the ejection mating structure 16 are integrally formed structures.

[0107] For example, the housing 11, the partition beam 15, and the ejector assembly structure 16 can be integrally formed using a die-casting process. This integrated design simplifies the manufacturing process and improves production efficiency.

[0108] In traditional split designs, the partition beam 15 and the box base plate 112 are often connected by welding, riveting, or bolting, creating a connection interface. Under ejection impact, vibration, and other loads, there is a risk of loosening and fatigue cracking. The one-piece molded structure eliminates these connection interfaces, making the load transmission path continuous, improving the overall rigidity and deformation resistance, and is especially beneficial for withstanding the instantaneous concentrated force during demolding.

[0109] Furthermore, if the ejector fitting structure 16 is a post-installed part, its positional tolerance, perpendicularity, and bonding strength are difficult to guarantee, which can easily lead to uneven loading of the mold ejector pins. However, by integrally molding it with the partition beam 15, structural stability can be maintained during repeated ejection processes.

[0110] In some embodiments, refer to Figure 5 and Figure 6As shown, when the ejector fitting structure 16 is formed and its side protrudes from the corresponding side surface of the partition beam 15, the excess material can be removed by milling, grinding or other cutting processes, so that the protruding side of the ejector fitting structure 16 retracts to be flush with or concave with the outer surface of the partition beam 15, thereby ensuring the electrical clearance.

[0111] In other embodiments, reference is made to Figure 3 and Figure 4 As shown, by adjusting the shape of the die-casting mold, the side of the ejector mating structure 16 after molding can be made to naturally form a flush or concave state with the surface of the corresponding side of the partition beam 15, thereby reducing the protrusion of the ejector mating structure 16 from the source and ensuring electrical clearance. This design does not require subsequent cutting processing, simplifies the manufacturing process, and improves production efficiency.

[0112] Therefore, the battery device provided in this application embodiment, by ensuring that at least a portion of the side of the ejector structure 16 on the partition beam 15 inside the housing 11 does not protrude beyond the surface of the corresponding side of the partition beam 15, can reduce local protrusions, increase the distance between the structure and the battery cell assembly, thereby improving insulation performance, reducing the risk of partial discharge and insulation breakdown, and thus improving the reliability of the battery device. Furthermore, by reducing the space occupied by the protruding structure, this application embodiment is beneficial to increasing the capacity of the battery cell assembly, thereby improving the energy density of the battery device.

[0113] In some embodiments, at least a portion of at least one of the first surface 151 and the second surface 152 of the partition beam 15 is provided with a first insulating layer.

[0114] The embodiments of this application improve the insulation performance between the separator beam 15 and the battery cell assembly by providing an insulating layer on the surface of the separator beam 15.

[0115] In some embodiments, at least a portion of at least one of the first side 161 and the second side 162 of the ejector mating structure 16 is provided with a second insulating layer.

[0116] The embodiments of this application improve the insulation performance between the top-out mating structure 16 and the battery cell assembly by providing an insulating layer on the side.

[0117] In some embodiments, the insulating layer may include insulating varnish, insulating film, insulating cloth, etc.

[0118] In some embodiments, refer to Figures 6 to 8 As shown, a portion of the first side 161 is flush with or recessed into the first surface 151, and another portion of the first side 161 protrudes from the first surface 151; and / or, a portion of the second side 162 is flush with or recessed into the second surface 152, and another portion of the second side 162 protrudes from the second surface 152.

[0119] As an example, the lower portion of the first side 161 may be flush with the first surface 151, and the upper portion may protrude from the first surface 151.

[0120] As an example, the lower portion of the second side 162 may be flush with the second surface 152, and the upper portion may protrude from the second surface 152.

[0121] This embodiment of the application reduces local protrusions and increases the distance between the ejector mating structure 16 and the battery cell assembly by making a portion of the side of the ejector mating structure 16 not protrude from the surface of the corresponding side of the partition beam 15. This improves insulation performance, reduces the risk of partial discharge and insulation breakdown, and thus improves the reliability of the battery device.

[0122] In some embodiments, refer to Figures 2 to 8 As shown, the housing 11 includes a base plate 112, a first battery cell assembly 13, a second battery cell assembly 14, and a partition beam 15 disposed on the base plate 112; the ejection mating structure 16 includes a first part 163 and a second part 164 distributed along the height direction Z. The first part 163 is disposed between the base plate 112 and the second part 164. The first part 163 has a first sub-side surface 1631 facing the first battery cell assembly 13 and a second sub-side surface 1632 facing the second battery cell assembly 14. The first side surface 161 includes the first sub-side surface 1631, and the second side surface 162 includes the second sub-side surface 1632. The first sub-side surface 1631 is flush with or recessed in the first surface 151, and / or the second sub-side surface 1632 is flush with or recessed in the second surface 152.

[0123] The first part 163 is the lower region of the ejector mating structure 16, and the second part 164 is the upper region of the ejector mating structure 16. The first sub-side 1631 and the second sub-side 1632 are the two sides of the lower region of the ejector mating structure 16 along the thickness direction Y. In this embodiment, by dividing the ejector mating structure 16 into upper and lower regions along the height direction Z, and ensuring that at least one sub-side of the lower region near the bottom plate 112 does not protrude from the surface of the corresponding side of the partition beam 15, local protrusions between the battery cell assembly and the ejector mating structure 16 in the bottom region on the corresponding side are effectively avoided, increasing the electrical clearance and creepage distance at that location. This improves the electrical insulation reliability of the battery device without affecting the ejection function and structural strength of the mold.

[0124] In some embodiments, refer to Figures 6 to 8As shown, the second part 164 has a third sub-side 1641 facing the first battery cell assembly 13 and a fourth sub-side facing the second battery cell assembly 14. The first side 161 includes the third sub-side 1641, and the second side 162 includes the fourth sub-side. At least a portion of the third sub-side 1641 is flush with or recessed from the first surface 151, and / or at least a portion of the fourth sub-side is flush with or recessed from the second surface 152.

[0125] The third sub-side 1641 and the fourth sub-side are the two sides along the thickness direction Y of the upper region of the ejection mating structure 16. The third sub-side 1641 and the first sub-side 1631 together form the first side 161 of the ejection mating structure 16, and the fourth sub-side and the second sub-side 1632 together form the second side 162 of the ejection mating structure 16.

[0126] This embodiment of the application further reduces the local protrusions caused by the ejector fitting structure 16 along the entire height direction Z by ensuring that at least a portion of at least one sub-side of the upper region of the ejector fitting structure 16 does not protrude beyond the surface of the corresponding side of the separator beam 15. This design not only reduces the problem of reduced electrical clearance caused by interference from the protruding structure in the upper region, but also works in synergy with the lower optimization to ensure that sufficient spacing and creepage distance are maintained between the battery cell assembly and the ejector fitting structure 16 along the entire height, thereby improving the overall insulation performance of the battery device.

[0127] In some embodiments, refer to Figures 4 to 8 As shown, the second part 164 has an ejector mating end 1643, and the third sub-side 1641 includes a third protruding surface 16411, which protrudes from the first surface 151 and extends from the end face of the ejector mating end 1643 toward the first part 163.

[0128] The ejector mating end 1643 refers to the top of the upper region of the ejector mating structure 16 away from the bottom plate 112 of the housing. Its end face is the position where the mold ejector pin directly applies force and bears the ejection load. A third protruding surface 16411 is provided in the second part 164 where this end is located. The third protruding surface 16411 protrudes from the first surface 151 of the partition beam 15 toward the first battery cell assembly 13. The third protruding surface 16411 extends from the end face of the ejector mating end 1643 toward the first part 163. This means that the upper end of the third protruding surface 16411 is connected to the end face of the ejector mating end 1643, and the lower end of the third protruding surface 16411 extends downward along the height direction Z, thereby forming a protruding structure on one side of the ejector mating end 1643.

[0129] In this embodiment, by providing a local protrusion structure at the ejection mating end 1643 of the ejection mating structure 16, the force-bearing area and structural strength of the ejection mating end 1643 can be increased, thereby improving the load-bearing capacity and stability of the housing 11 during the ejection demolding process, reducing the risk of deformation or damage, and thus improving the reliability of the battery device.

[0130] In some embodiments, the third protruding surface 16411 can be an arc surface, a slope, etc.

[0131] In some embodiments, refer to Figure 7 As shown, in the height direction Z, the ratio of the height of the third protruding surface 16411 to the height of the first side surface 161 is 20% to 50%. Optionally, this height ratio can be 25% to 46%. For example, this height ratio can be 25%, 45%, etc. The height of the third protruding surface 16411 is the distance between its upper and lower ends along the height direction Z, and correspondingly, the height of the first side surface 161 is the distance between its upper and lower ends along the height direction Z.

[0132] If the height of the third protruding surface 16411 is too small (e.g., less than 20%), the ejector mating end 1643 will be unable to form an effective load-bearing support structure, failing to improve the rigidity and load-bearing area of ​​the ejector mating end 1643, potentially leading to defects such as crushing or puncture during die casting demolding. If the height of the third protruding surface 16411 is too large (e.g., exceeding 50%), its downward extension will cover the middle section or even the lower area of ​​the separator beam, affecting the electrical clearance and creepage distance between it and the battery cell assembly.

[0133] Therefore, this embodiment limits the extension height of the third protruding surface 16411 in the upper region of the ejector mating structure 16. While ensuring that the ejector mating end 1643 has sufficient bearing area and structural strength to reliably complete the demolding of the housing 11, it effectively limits the extension range of the local protrusion, thereby increasing the flat surface of the lower region of the ejector mating structure 16 as much as possible, improving the electrical clearance and creepage distance between this region and the battery cell assembly, and thus improving the electrical insulation reliability.

[0134] In some embodiments, refer to Figure 7 As shown, the area of ​​the third protruding surface 16411 on the third sub-side surface 1641 is 10% to 50%. Optionally, this area percentage can be 20% to 40%. For example, this area percentage can be 23%, 35%, etc.

[0135] If the area of ​​the third protruding surface 16411 is too small (e.g., less than 10%), its reinforcing effect on the ejector mating end 1643 will be minimal, making it difficult to form an effective load-bearing structure. Under the impact of die casting demolding, there may be a risk of local crushing or fatigue cracking. If the area of ​​the third protruding surface 16411 is too large (e.g., more than 50%), it will cause a large area of ​​the surface of the separator beam to bulge outward, affecting the electrical clearance between it and the battery cell assembly.

[0136] To address this, this embodiment of the application limits the area of ​​the third protruding surface 16411, ensuring sufficient structural strength and effective load-bearing area for the ejector mating end 1643 while effectively controlling the local protrusion range facing the battery cell side. This design avoids the problem of reduced electrical clearance caused by large-area protrusions, reducing the risk of insulation failure; at the same time, it ensures the structural reliability of the ejection area, preventing crushing or fatigue damage during demolding. Thus, the overall reliability of the battery device is further improved.

[0137] In some embodiments, refer to Figure 8 As shown, the second part 164 has an ejector mating end 1643, and the fourth sub-side includes a fourth protruding surface 1642. The fourth protruding surface 1642 protrudes from the second surface 152 and extends from the end face of the ejector mating end 1643 toward the first part 163.

[0138] A fourth protruding surface 1642 is provided in the upper region where the ejector mating end 1643 is located. The fourth protruding surface 1642 protrudes from the second surface 152 in the direction of the second battery cell assembly 14. The fourth protruding surface 1642 extends from the end face of the ejector mating end 1643 in the direction of the first part 163. This means that the upper end of the fourth protruding surface 1642 is connected to the end face of the ejector mating end 1643, and the lower end of the fourth protruding surface 1642 extends downward along the height direction Z, thereby forming a protruding structure on the other side of the ejector mating end 1643.

[0139] In this embodiment, by providing a local protrusion structure at the ejection mating end 1643 of the ejection mating structure 16, the force-bearing area and structural strength of the ejection mating end 1643 can be increased, thereby improving the load-bearing capacity and stability of the housing 11 during the ejection demolding process, reducing the risk of deformation or damage, and thus improving the reliability of the battery device.

[0140] In some embodiments, refer to Figure 8As shown, in the height direction Z, the ratio of the height of the fourth protruding surface 1642 to the height of the second side surface 162 is 20% to 50%. Optionally, this height ratio can be 25% to 46%. For example, this height ratio can be 25%, 45%, etc. The height of the fourth protruding surface 1642 is the distance between its upper and lower ends along the height direction Z, and correspondingly, the height of the second side surface 162 is the distance between its upper and lower ends along the height direction Z.

[0141] If the height of the fourth protruding surface 1642 is too small (e.g., less than 20%), the ejector mating end 1643 will be unable to form an effective load-bearing support structure, failing to improve the rigidity and load-bearing area of ​​the ejector mating end 1643, potentially leading to defects such as crushing or puncture during die casting demolding. If the height of the fourth protruding surface 1642 is too large (e.g., exceeding 50%), its downward extension will cover the middle section or even the lower area of ​​the separator beam, affecting the electrical clearance and creepage distance between it and the battery cell assembly.

[0142] Therefore, this embodiment limits the extension height of the fourth protruding surface 1642 in the upper region of the ejector mating structure 16. This ensures that the ejector mating end 1643 has sufficient bearing area and structural strength to reliably complete the demolding of the housing 11, while effectively limiting the extension range of the local protrusion. This increases the flat surface of the lower region of the ejector mating structure 16 as much as possible, improves the electrical clearance and creepage distance between this region and the battery cell assembly, and thus improves the electrical insulation reliability.

[0143] In some embodiments, the area of ​​the fourth protruding surface 1642 on the fourth sub-side surface is 10% to 50%. Optionally, this area percentage can be 20% to 40%. For example, this area percentage can be 23%, 35%, etc.

[0144] If the area of ​​the fourth protruding surface 1642 is too small (e.g., less than 10%), its reinforcing effect on the ejector mating end 1643 will be minimal, making it difficult to form an effective load-bearing structure. Under the impact of die casting demolding, there may be a risk of local crushing or fatigue cracking. If the area of ​​the fourth protruding surface 1642 is too large (e.g., more than 50%), it will cause a large area of ​​the surface of the separator beam to bulge outward, affecting the electrical clearance between it and the battery cell assembly.

[0145] To address this, this embodiment of the application limits the area of ​​the fourth protruding surface 1642, ensuring sufficient structural strength and effective load-bearing area for the ejector mating end 1643 while effectively controlling the local protrusion range facing the battery cell side. This design avoids the problem of reduced electrical clearance caused by large-area protrusions, reducing the risk of insulation failure; at the same time, it ensures the structural reliability of the ejection area, preventing crushing or fatigue damage during demolding. Thus, the overall reliability of the battery device is further improved.

[0146] In some embodiments, refer to Figures 3 to 8 As shown, the first sub-side surface 1631 of the first portion 163 of the ejector fitting structure 16 is flush with the first surface 151 of the partition beam 15, and the second sub-side surface 1632 of the first portion 163 is flush with the second surface 152 of the partition beam 15; the second portion 164 of the ejector fitting structure 16 has a third protruding surface 16411 protruding from the first surface 151 and a fourth protruding surface 1642 protruding from the second surface 152. Wherein, as... Figure 7 As shown, the portion of the ejector fitting structure 16 below the dashed line that is flush with the surface of the partition beam 15 is the first part 163, and the portion above the dashed line with a protruding surface is the second part 164.

[0147] In some embodiments, refer to Figure 6 and Figure 8 As shown, the first part 163 has a connecting end 1633, which is connected to the base plate 112. The second part 164 has an ejector mating end 1643. The cross-sectional area of ​​the connecting end 1633 in the first direction is larger than the cross-sectional area of ​​the ejector mating end 1643 in the first direction. The first direction is perpendicular to the height direction Z. The first direction can be understood as the "XY horizontal plane" direction.

[0148] It is understood that the ejector mating end 1643 and the connecting end 1633 are the upper and lower ends of the ejector mating structure 16. The ejection force is applied to the ejector mating end 1643 by the mold ejector pins and then transmitted through the entire ejector mating structure 16 to the partition beam 15 and the box bottom plate 112, ultimately driving the entire box to demold. The connecting end 1633, as the "root" of the force transmission, bears a large load. In this embodiment, by making the cross-sectional area of ​​the connecting end 1633 larger than that of the ejector mating end 1643, the entire ejector mating structure 16 has a structure that is wider at the bottom and narrower at the top. This improves the bonding strength between the ejector mating structure 16 and the box bottom plate 112, preventing root breakage or loosening of the ejector mating structure 16 during the demolding process of the box 11. As an example, such as... Figure 8 As shown, the cross-sectional area shape of the ejector mating structure 16 in the YZ plane direction can be trapezoidal.

[0149] Therefore, this embodiment of the application improves the connection strength and force transmission efficiency between the ejector fitting structure 16 and the bottom plate 112 by making the ejector fitting structure 16 have a bottom-reinforced structure. This design ensures that the ejection force can be stably and reliably transmitted from the ejector fitting structure 16 to the entire housing 11, thereby improving the stability of the housing 11 during the ejection and demolding process, reducing the risk of deformation or damage, and thus improving the reliability of the battery device.

[0150] In some embodiments, refer to Figure 9As shown, the partition beam 15 has a top end and a bottom end. The bottom end is connected to the bottom plate 112 of the box body, and the top end is the upper end away from its bottom end. The cross-sectional area of ​​the bottom end in the first direction is larger than that of the top end in the first direction. This design allows the entire partition beam 15 to have a structure that is wider at the bottom and narrower at the top, improving the connection strength between the partition beam 15 and the bottom plate 112 of the box body, thereby enhancing the stability of the box body 11 during the ejection and demolding process. As an example, the cross-sectional shape of the partition beam 15 in the YZ plane direction can be trapezoidal.

[0151] In some embodiments, refer to Figure 4 and Figure 6 As shown, the partition beam 15 has a top surface 153, and at least a portion of the end face of the ejector mating end 1643 protrudes from the top surface 153.

[0152] The top surface 153 of the partition beam 15 refers to the upper surface of its top end. At least a portion of the end face of the ejector mating end 1643 protruding beyond the top surface 153 means that at least a portion of the end face of the ejector mating end 1643 protrudes upwards, higher than the top surface 153 of the partition beam 15. Optionally, the entire end face of the ejector mating end 1643 protrudes beyond the top surface 153 of the partition beam 15.

[0153] This design improves the docking accuracy and contact reliability of the ejector pins of the ejector structure 16 and the mold of the housing 11 without interfering with the electrical clearance between the battery cell assembly and the ejector structure 16. This design ensures that the mold ejector pins can act quickly and accurately on the ejector structure 16, avoiding demolding failure, housing 11 deformation, or structural damage caused by positioning deviations or poor contact, thereby improving the yield rate and production efficiency of the housing 11.

[0154] In some embodiments, refer to Figure 9 As shown, the thickness of the partition beam 15 gradually decreases along the height direction Z from the bottom to the top.

[0155] The bottom of the partition beam 15 is one end connected to the bottom plate 112 of the box body, and the top end is the other end away from the bottom plate 112 of the box body. In this embodiment of the application, by making the bottom thickness of the partition beam 15 greater than the top thickness, the structural strength of the bottom of the partition beam 15 can be strengthened, and its connection strength and force transmission efficiency with the box body 11 can be improved, thereby helping to improve the stability and reliability of the box body 11 during the ejection and demolding process.

[0156] In some embodiments, refer to Figure 2 , Figure 3 and Figure 5As shown, multiple ejector fitting structures 16 are arranged at intervals along the length direction X of the partition beam 15. The multiple ejector fitting structures 16 include a first ejector fitting structure 165 and a second ejector fitting structure 166. The two ends of the partition beam 15 are respectively provided with the first ejector fitting structure 165, and the second ejector fitting structure 166 is located between the two ends of the first ejector fitting structure 165. The height of the first ejector fitting structure 165 is greater than the height of the second ejector fitting structure 166. Figure 3 The dashed area shown can be understood as the side projection area of ​​the top-mounted mating structure.

[0157] This application embodiment achieves multi-point force distribution by setting multiple ejection mating structures 16 along the length direction X of the partition beam 15, thereby improving the demolding stability, reliability, and efficiency of the box body 11.

[0158] Furthermore, since the partition beam 15 is connected to the housing frame 111 at both ends, the housing frame 111 easily forms a strong clamping force with the mold sidewall, and the demolding resistance is usually higher than in the middle area. To address this, this embodiment of the application provides a higher and stronger first ejection mating structure 165 at both ends of the partition beam 15, which can provide stronger ejection stiffness and support force at the ends of the partition beam 15, effectively suppressing the warping deformation of the housing 11 during demolding, improving the molding accuracy of the housing 11, and thus improving the reliability of the battery device.

[0159] In some embodiments, refer to Figure 3 and Figure 5 As shown, the height of both ends of the partition beam 15 along the length direction X is greater than the height of its middle part, which improves the structural strength of both ends and ensures the reliability of demolding of the box body 11.

[0160] In a specific example, refer to Figures 2 to 9 As shown, this application provides a battery device, including: a housing 11, a first battery cell assembly 13, a second battery cell assembly 14, a partition beam 15, and a plurality of ejection mating structures 16. The first battery cell assembly 13 and the second battery cell assembly 14 are disposed within the housing 11; the partition beam 15 is disposed within the housing 11 and located between the first battery cell assembly 13 and the second battery cell assembly 14, and the partition beam 15 has a first surface 151 facing the first battery cell assembly 13 and a second surface 152 facing the second battery cell assembly 14.

[0161] Multiple ejector fitting structures 16 are spaced apart along the length direction X of the partition beam 15 and pass through the partition beam 15 along the height direction Z. The ejector fitting structure 16 has a first side 161 facing the first battery cell assembly 13 and a second side 162 facing the second battery cell assembly 14. The first side 161 includes a first sub-side 1631 and a third sub-side 1641, and the second side 162 includes a second sub-side 1632 and a fourth sub-side.

[0162] The ejection mating structure 16 includes a first portion 163 and a second portion 164 distributed along the height direction Z. The first portion 163 has a first sub-side surface 1631 and a second sub-side surface 1632. The first sub-side surface 1631 is flush with the first surface 151 of the partition beam 15, and the second sub-side surface 1632 is flush with the second surface 152 of the partition beam 15. The second portion 164 has a third sub-side surface 1641 and a fourth sub-side surface. The third sub-side surface 1641 includes a third protruding surface 16411 that protrudes from the first surface 151 of the partition beam, and the fourth sub-side surface includes a fourth protruding surface 1642 that protrudes from the second surface 152 of the partition beam.

[0163] In this embodiment, by providing a partially protruding structure in the upper part of the ejector fitting structure 16 and a flush structure in the lower part, it is possible to ensure that sufficient electrical clearance is maintained between the battery cell assembly and the housing structure while satisfying the housing demolding function. This improves insulation performance and resistance to electrical breakdown, reduces the risk of partial discharge, and thus improves the reliability of the battery device.

[0164] In another specific example, refer to Figure 10 and Figure 11 As shown, the ejector fitting structure 16 includes a plate 167 and an ejector pin 168. The plate 167 and the partition beam 15 are integrally formed. The plate 167 has a fifth sub-side 1671 facing the first battery cell assembly 13 and a sixth sub-side facing the second battery cell assembly 14. The fifth sub-side 1671 is flush with the first surface 151 of the partition beam 15, and the sixth sub-side is flush with the second surface 152 of the partition beam 15. The ejector pin 168 is inserted through the plate 167 along the height direction Z. The ejector pin 168 has a seventh sub-side 1681 facing the first battery cell assembly 13 and an eighth sub-side facing the second battery cell assembly 14. At least a portion of the seventh sub-side 1681 protrudes from the first surface 151 of the partition beam 15, and at least a portion of the eighth sub-side protrudes from the second surface 152 of the partition beam 15. The first side 161 includes the fifth sub-side 1671 and the seventh sub-side 1681, and the second side 162 includes the sixth sub-side and the eighth sub-side.

[0165] Plate 167 is the main part of ejector fitting structure 16, and it and partition beam 15 can be integrally formed by die casting. Ejector pin 168 is embedded in plate 167 along the height direction Z, and is the ejector fitting part of ejector fitting structure 16. It is mainly used to abut against the ejector pin end face of mold after box 11 is die cast. The ejector pin of mold applies a pushing force to ejector pin 168 of ejector fitting structure 16, thereby ejecting the entire box 11 from the mold cavity through plate 167 and partition beam 15, realizing demolding of box 11.

[0166] The fifth sub-side 1671 and the sixth sub-side are the two sides of the plate 167 along the thickness direction Y, the seventh sub-side 1681 and the eighth sub-side are the two sides of the ejector pin 168 along the thickness direction Y, the fifth sub-side 1671 and the seventh sub-side 1681 together form the first side 161 of the ejection mating structure 16, and the sixth sub-side and the eighth sub-side together form the second side 162 of the ejection mating structure 16.

[0167] In this embodiment, the side surface of the plate 167 of the ejector fitting structure 16 is flush with the corresponding surface of the partition beam 15, which reduces local protrusions and increases the distance between the plate and the battery cell assembly, thereby improving insulation performance and reducing the risk of partial discharge and insulation breakdown. By having at least a portion of the side surface of the ejector pin 168 protrude from the corresponding surface of the partition beam 15, the force-bearing area and structural strength of the ejector pin 168 can be increased, thereby improving the load-bearing capacity and stability of the housing 11 during the ejection and demolding process, reducing the risk of deformation or damage, and ultimately improving the reliability of the battery device.

[0168] In some embodiments, refer to Figure 11 As shown, multiple ejector fitting structures 16 are arranged at intervals along the length direction X of the partition beam 15. The multiple ejector fitting structures 16 include a first ejector fitting structure 165 and a second ejector fitting structure 166. The two ends of the partition beam 15 are respectively provided with the first ejector fitting structure 165, and the second ejector fitting structure 166 is located between the two ends of the first ejector fitting structure 165. The first ejector fitting structure 165 includes a first ejector pin 1691, and the second ejector fitting structure 166 includes a second ejector pin 1692. The height of the first ejector pin 1691 is greater than the height of the second ejector pin 1692.

[0169] The first ejector pin 1691 protrudes at least partially from the corresponding side surface of the partition beam 15 on both sides along the thickness direction Y, and the second ejector pin 1692 protrudes at least partially from the corresponding side surface of the partition beam 15 on both sides along the thickness direction Y.

[0170] The first ejection mating structure 165 also includes a first plate 1693, and the second ejection mating structure 166 also includes a second plate 1694. The first plate 1693 and the second plate 1694 are integrally formed with the partition beam 15, and the sides of the first plate 1693 and the second plate 1694 are flush with the surface of the partition beam 15. Figure 11 The dashed area shown can be understood as the side projection area of ​​the plate body of the top-mounted mating structure.

[0171] This embodiment of the application can achieve multi-point force application by setting multiple ejector pins in the length direction X of the partition beam 15, thereby improving the demolding stability, reliability and efficiency of the box 11.

[0172] Furthermore, since the partition beam 15 is connected to the housing frame 111 at both ends, the housing frame 111 easily forms a strong clamping force with the mold sidewall, and the demolding resistance is usually higher than in the middle area. To address this, this embodiment provides higher and stronger first ejector pins 1691 at both ends of the partition beam 15, which can provide stronger ejection stiffness and support force at the ends of the partition beam 15, effectively suppressing the warping deformation of the housing 11 during demolding, improving the molding accuracy of the housing 11, and thus improving the reliability of the battery device.

[0173] In some embodiments, this application also provides an electrical device, including: a battery device 100 of any of the above embodiments, the battery device 100 being used to provide electrical energy.

[0174] The power supply device can be any of the aforementioned devices or systems that utilize battery device 100.

[0175] The above are merely preferred embodiments of this application and are not intended to limit the embodiments of this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the embodiments of this application should be included within the protection scope of the embodiments of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. 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: Box; The first battery cell assembly and the second battery cell assembly are disposed inside the housing; A partition beam is disposed inside the housing and located between the first battery cell assembly and the second battery cell assembly. The partition beam has a first surface facing the first battery cell assembly and a second surface facing the second battery cell assembly. An ejector fitting structure is inserted through the partition beam along the height direction. The ejector fitting structure has a first side facing the first battery cell assembly and a second side facing the second battery cell assembly. At least a portion of the first side is flush with or recessed in the first surface, and / or at least a portion of the second side is flush with or recessed in the second surface.

2. The battery device according to claim 1, characterized in that, A portion of the first side is flush with or recessed into the first surface, while another portion of the first side protrudes from the first surface; And / or, a portion of the second side is flush with or recessed into the second surface, while another portion of the second side protrudes from the second surface.

3. The battery device according to claim 1, characterized in that, The enclosure includes a base plate, and the first battery cell assembly, the second battery cell assembly, and the partition beam are disposed on the base plate; The ejection mating structure includes a first part and a second part distributed along the height direction. The first part is disposed between the base plate and the second part. The first part has a first sub-side facing the first battery cell assembly and a second sub-side facing the second battery cell assembly. The first side includes the first sub-side, and the second side includes the second sub-side. The first sub-side is flush with or recessed in the first surface, and / or the second sub-side is flush with or recessed in the second surface.

4. The battery device according to claim 3, characterized in that, The second portion has a third sub-side facing the first battery cell assembly and a fourth sub-side facing the second battery cell assembly, the first side including the third sub-side, the second side including the fourth sub-side, at least a portion of the third sub-side being flush with or recessed in the first surface, and / or at least a portion of the fourth sub-side being flush with or recessed in the second surface.

5. The battery device according to claim 4, characterized in that, The second part has an ejector mating end, and the third sub-side includes a third protruding surface, which protrudes from the first surface and extends from the end face of the ejector mating end toward the first part. And / or, the second portion has an ejector mating end, and the fourth sub-side surface includes a fourth protruding surface that protrudes from the second surface and extends from the end face of the ejector mating end toward the first portion.

6. The battery device according to claim 5, characterized in that, In the height direction, the ratio of the height of the third protruding surface to the height of the first side surface is 20% to 50%; And / or, in the height direction, the ratio of the height of the fourth protruding surface to the height of the second side surface is 20% to 50%.

7. The battery device according to claim 3, characterized in that, The first part has a connecting end connected to the base plate, and the second part has an ejector mating end. The cross-sectional area of ​​the connecting end in a first direction is greater than the cross-sectional area of ​​the ejector mating end in the first direction, and the first direction is perpendicular to the height direction.

8. The battery device according to claim 7, characterized in that, The partition beam has a top surface, and at least a portion of the end face of the ejector mating end protrudes from the top surface.

9. The battery device according to any one of claims 1 to 8, characterized in that, The thickness of the partition beam gradually decreases along the height direction from the bottom to the top.

10. The battery device according to any one of claims 1 to 8, characterized in that, At least a portion of at least one of the first surface and the second surface is provided with a first insulating layer.

11. The battery device according to any one of claims 1 to 8, characterized in that, At least a portion of at least one of the first side and the second side is provided with a second insulating layer.

12. The battery device according to any one of claims 1 to 8, characterized in that, Multiple ejector fitting structures are provided at intervals along the length of the partition beam. The multiple ejector fitting structures include a first ejector fitting structure and a second ejector fitting structure. The first ejector fitting structure is provided at both ends of the partition beam, and the second ejector fitting structure is provided between the first ejector fitting structures at both ends. The height of the first ejector fitting structure is greater than the height of the second ejector fitting structure.

13. The battery device according to claim 1, characterized in that, The ejection mating structure includes a plate and an ejector pin. The plate and the partition beam are integrally formed. The plate has a fifth sub-side facing the first battery cell assembly and a sixth sub-side facing the second battery cell assembly. The fifth sub-side is flush with the first surface, and the sixth sub-side is flush with the second surface. The ejector pin is inserted through the plate along the height direction. The ejector pin has a seventh sub-side facing the first battery cell assembly and an eighth sub-side facing the second battery cell assembly. At least a portion of the seventh sub-side protrudes from the first surface, and at least a portion of the eighth sub-side protrudes from the second surface. The first side includes the fifth sub-side and the seventh sub-side, and the second side includes the sixth sub-side and the eighth sub-side.

14. The battery device according to claim 13, characterized in that, Multiple ejector fitting structures are provided at intervals along the length of the partition beam. The multiple ejector fitting structures include a first ejector fitting structure and a second ejector fitting structure. The first ejector fitting structure is provided at both ends of the partition beam, and the second ejector fitting structure is provided between the first ejector fitting structures at both ends. The first ejector fitting structure includes a first ejector pin, and the second ejector fitting structure includes a second ejector pin. The height of the first ejector pin is greater than the height of the second ejector pin.

15. The battery device according to any one of claims 1 to 8, characterized in that, The box body and the partition beam are integrally formed structures; And / or, the partition beam and the ejector fitting structure are integrally formed.

16. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1 to 15, wherein the battery device is used to provide electrical energy.

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