Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment. The battery device comprises a box body, a protection plate and a sealing piece, the box body comprises a first box body, and the first box body comprises a frame and a connecting plate. The frame comprises two first edge beams which are arranged in a spaced mode in the first direction, the two first edge beams are welded to the two ends of the connecting plate in a one-to-one correspondence mode, welding seams are formed in the corresponding welding positions, and the first direction intersects with the height direction of the first box body; the common plane of the first direction and the height direction of the first box body intersects with the length direction of the first edge beam. The protection plate is arranged at the bottom of the first box body and connected with the first box body. The sealing piece is arranged between the protection plate and the frame, the sealing piece is in sealing fit with the protection plate and the first edge beam, and the sealing piece and the welding seam are arranged in a staggered mode in the first direction. Through staggered arrangement of the sealing piece and the welding seam, the situation that the sealing effect is affected due to unevenness of the matching surface of the first edge beam and the sealing piece caused by the welding seam is reduced, and the sealing reliability of the sealing piece and the first edge beam is improved.

Description

Technical Field

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

[0002] As the energy source for core equipment in new energy vehicles and energy storage systems, the reliability of batteries determines their lifespan. The battery enclosure, serving as both the mounting platform and protective component, not only needs sufficient structural strength but also good sealing to prevent external water and dust from entering. Currently, poor sealing is a problem when installing battery enclosures. Utility Model Content

[0003] In view of the above problems, this application provides a battery device and electrical equipment, which can reduce the impact of the weld on the sealing performance of the seal by misaligning the seal and the weld, thereby improving the sealing performance of the housing.

[0004] In a first aspect, this application provides a battery device, comprising:

[0005] The box body includes a first box body, which includes a frame and a connecting plate. The frame includes two first side beams spaced apart along a first direction. The two first side beams are welded to the two ends of the connecting plate one by one and have welds at the corresponding welding positions. The first direction intersects with the height direction of the first box body, and the plane where the first direction and the height direction of the first box body are located intersects with the length direction of the first side beams.

[0006] A protective panel is located at the bottom of the first housing and connected to the first housing.

[0007] A sealing element is provided between the protective plate and the frame. The sealing element is in sealing fit with the protective plate and the first side beam respectively. Along the first direction, the sealing element is staggered from the weld.

[0008] By misaligning the seal and the weld, the sealing surface of the first side beam facing the seal can be kept flat, reducing the possibility of unevenness between the first side beam and the seal affecting the sealing effect due to the weld, and improving the reliability of the seal between the seal and the first side beam.

[0009] In some embodiments, the weld and the seal are spaced apart along a first direction.

[0010] This allows the weld to completely avoid the sealing surface of the first side beam facing the seal, thereby improving the reliability of the seal between the seal and the first side beam during installation.

[0011] In some embodiments, the first side beam includes a body portion and a protrusion portion. The body portion is sealed to a seal. The protrusion portions are respectively connected to the sides of the body portions of the two first side beams facing each other. The protrusion portion of one first side beam is welded to one end of a connecting plate and a weld is provided at the welding position. The protrusion portion of the other first side beam is welded to the other end of a connecting plate and a weld is provided at the welding position.

[0012] By setting the protrusion, the weld can avoid the sealing surface of the first side beam facing the seal along the first direction. When installing the protective plate and the seal, the seal will not come into contact with the weld, so that the seal can achieve a good sealing effect.

[0013] In some embodiments, the bottom of the protrusion is flush with the bottom of the body; and / or, the bottom of the connecting plate is flush with the bottom of the protrusion; and / or, the top of the connecting plate is flush with the top of the protrusion.

[0014] Since the protrusion is connected to the connecting plate, the position of the protrusion can change the position of the connecting plate along the height direction of the first housing. By setting the bottom of the protrusion flush with the bottom of the main body, compared with the method where the bottom of the protrusion is not flush with the bottom of the main body, the structure of the first housing is more compact, which helps to reduce the space occupied by the first housing along its own height direction. Furthermore, without changing the thickness of the protrusion and the main body, it helps to increase the volume of the accommodation space jointly defined by the frame and the connecting plate, thereby increasing the volumetric energy density of the battery device.

[0015] In some embodiments, along the first direction, the size of the first side beam is W1, the size of the seal is W2, and the difference between W1 and W2 is greater than or equal to 4 mm.

[0016] Therefore, when welding the first side beam to the connecting plate, the weld seam can be arranged adjacent to or spaced apart from the seal to reduce the damage of the weld seam to the sealing surface of the first side beam facing the seal during the welding process, so that the seal and the first side beam have better sealing performance during assembly.

[0017] In some embodiments, along the first direction, the size of the body portion is W3, and W2 is less than or equal to W3.

[0018] Therefore, the weld and the seal can be spaced apart along the first direction, reducing the possibility of the seal pressing on the weld during installation, thereby achieving a better sealing effect between the seal and the first side beam.

[0019] In some embodiments, the connecting plate includes a plate body and a connecting portion. The plate body is connected to the connecting portion at both ends along a first direction. Along the height direction of the first box, the size of the connecting portion is larger than the size of the plate body. The connecting portion is welded to the first side beam and a weld is provided at the welding position.

[0020] The connecting portion is larger than the plate body, creating a bent structure. The connecting portion forms a bent edge, and by welding it to the first side beam, the mating surfaces of the seal and the first side beam are avoided. This reduces the impact of the weld on the mating surfaces during assembly, improving sealing performance. Furthermore, the bent structure of the connecting plate enhances the overall strength of the first housing.

[0021] In some embodiments, the connecting part is located on the top of the plate body, the top end of the connecting part is welded to the first side beam, and the weld seam is spaced apart from the bottom of the first side beam along the height direction of the first box body.

[0022] Therefore, the weld between the connecting part and the first side beam can be spaced apart from the bottom of the first side beam along the height direction of the first box body. During installation, the problem of poor sealing caused by the sealing element abutting the weld due to installation deviation along the first direction can be ignored, thus making installation more convenient.

[0023] In some embodiments, the bottom of the plate body is flush with the bottom of the first side beam.

[0024] Compared to the bottom of the plate body being higher than the bottom of the first side beam, this increases the volume of the accommodation space jointly defined by the frame and the connecting plate, which is beneficial to improving the volumetric energy density of the battery device.

[0025] In some embodiments, the connecting portion is located at the bottom of the plate body, and the bottom of the connecting portion is welded to the first side beam.

[0026] This allows the connecting part to form a downward bending structure, thereby achieving a misalignment between the weld and the seal, and also helps to improve the strength of the first housing.

[0027] In some embodiments, the two first side beams are respectively provided with positioning grooves on the sides facing each other, and at least part of the connecting part is provided in the positioning groove, with the bottom of the connecting part welded to the groove wall of the positioning groove.

[0028] The positioning groove allows for pre-positioning of the connection before welding, making the welding more accurate and reducing welding deviations.

[0029] In some embodiments, the connecting plate has a heat exchange channel inside, which is configured to allow a heat exchange medium to pass through.

[0030] Therefore, adjusting the operating temperature of the battery device during operation to ensure it operates at a suitable temperature helps improve the reliability of the battery device.

[0031] Secondly, this application provides an electrical device, including the battery device of the first aspect, which is used to provide electrical energy to the electrical device.

[0032] Since the electrical equipment includes all the technical features of the battery device described in the first aspect above, and its effect is the same as described above, it will not be repeated here.

[0033] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0034] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0035] Figure 1 This is an exploded view of a battery device according to some embodiments of this application;

[0036] Figures 2-4 This is a partial cross-sectional view of a battery device according to a different embodiment of this application, passing through the first side beam.

[0037] Figure 5 This is a structural diagram of an electrical device, specifically a vehicle, according to some embodiments of this application.

[0038] The reference numerals in the detailed embodiments are as follows:

[0039] 1000, Vehicle; 100, Battery unit; 200, Controller; 300, Motor;

[0040] 1. Box body; 11. First box body; 111. Frame; 1111. First side beam; 11111. Main body; 11112. Protrusion; 11113. Extension; 11114. Positioning groove; 112. Connecting plate; 113. Weld; 1121. Plate body; 1122. Connecting part; 12. Second box body;

[0041] 2. Battery cell assembly; 20. Battery cell;

[0042] 3. Protective panels;

[0043] 4. Sealing components;

[0044] X, first direction; Z, altitude direction. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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).

[0051] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0052] 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.

[0053] During installation, the protective plate at the bottom of the enclosure needs to be sealed to the side beam of the enclosure via a sealing strip. The side beam and the bottom plate of the enclosure are fixed by welding. However, the weld is located on the sealing surface between the sealing strip and the side beam. The surface roughness of the weld is relatively large, which affects the sealing between the sealing strip and the side beam.

[0054] In view of this, this application provides a battery device in which the sealing surface of the first side beam facing the sealing element is kept flat by the misalignment of the sealing element and the weld, thereby reducing the impact of uneven weld on the sealing effect at the joint between the first side beam and the sealing element and improving the reliability of the seal between the sealing element and the first side beam.

[0055] The electrical equipment described in this application applies to a variety of devices that use battery-powered devices. For example, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft, such as aircraft, rockets, space shuttles, and spacecraft.

[0056] For ease of explanation, please refer to the following examples. Figure 1 The following description will be based on a battery device 100 according to some embodiments of this application.

[0057] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies 2 for providing voltage and capacity. The battery cell assembly 2 may include a plurality of battery cells 20, which are connected in series, parallel, or mixed connection via a busbar.

[0058] In some embodiments, the battery cell assembly 2 is typically formed by arranging a plurality of battery cells 20.

[0059] As an example, the battery cell assembly 2 can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into an independent module. As an example, the battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0060] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 1 and one or more battery cell assemblies 2, the battery cell assemblies 2 being housed in the housing 1.

[0061] As an example, the battery cell assembly 2 can be a battery module, and the battery cell assembly 2 can be housed in the housing 1 by fixing the battery module in the housing 1.

[0062] As an example, the battery cell assembly 2 can also be housed in the housing 1 by directly fixing multiple battery cells 20 to the housing 1.

[0063] As an example, the housing 1 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 1 to house the battery cell assembly 2. Here, "closed" refers to covering or closing, and can be either sealed or unsealed.

[0064] The housing 1 can be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 1 can be at least a part of the floor of the vehicle 1000, or a portion of the housing 1 can be at least a part of the crossbeams and longitudinal beams of the vehicle 1000.

[0065] The battery cell 20 can be a secondary battery, which is a battery that can be used again after the battery cell 20 has been discharged because the active materials can be activated by charging.

[0066] The battery cell 20 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.

[0067] A single battery cell 20 typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the negative and positive electrodes. During the charging and discharging process of the single battery cell 20, 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 between them while allowing active ions to pass through.

[0068] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0069] Taking the wound structure as an example, the positive electrode and the negative electrode are wound into a wound structure, and a separator is provided between the positive electrode and the negative electrode.

[0070] In some embodiments, the battery cell 20 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 for encapsulating 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.

[0071] As an example, the battery cell 20 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 square-shell battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0072] 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 be provided with one or more.

[0073] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0074] In some embodiments, a pressure relief mechanism is provided on the housing. The pressure relief mechanism is used to release the internal gas of the battery cell 20.

[0075] As an example, when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold, the pressure relief mechanism is activated to release the internal pressure or temperature. When the internal pressure or temperature of the battery cell 20 reaches the predetermined threshold, the pressure relief mechanism performs its action, or a weak structure within the pressure relief mechanism is damaged, thereby creating an opening or channel for the release of internal pressure or temperature. This threshold design varies depending on design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 20.

[0076] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0077] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0078] The term "actuation" as used in this application refers to the pressure relief mechanism being activated or undergoing a certain state, thereby releasing the internal pressure and temperature of the battery cell 20. The actions of the pressure relief mechanism may include, but are not limited to: movement of components within the pressure relief mechanism to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism, etc. When the pressure relief mechanism is actuated, the high-temperature, high-pressure substances inside the battery cell 20 are discharged outwards from the actuated portion as waste. This method enables the battery cell 20 to release pressure and temperature under controllable conditions, thereby preventing potentially more serious accidents.

[0079] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for venting gas inside the battery cell 20.

[0080] The emissions from the battery cell 20 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0081] In some embodiments, please refer to Figures 1-4 The battery device 100 includes a housing 1, a protective plate 3, and a sealing element 4. The housing 1 includes a first housing 11, which includes a frame 111 and a connecting plate 112. The frame 111 includes two first side beams 1111 spaced apart along a first direction X. Each of the two first side beams 1111 is welded to one end of the connecting plate 112, and welds 113 are provided at corresponding welding positions. The first direction X intersects with the height direction Z of the first housing 11, and the plane containing both the first direction X and the height direction Z intersects with the length direction of the first side beams 1111. The protective plate 3 is located at the bottom of the first housing 11 and connected to it. The sealing element 4 is located between the protective plate 3 and the frame 111, and it provides a sealing fit with both the protective plate 3 and the first side beams 1111. Along the first direction X, the sealing element 4 is offset from the welds 113.

[0082] Frame 111 is typically a ring structure formed by connecting at least four side beams end to end.

[0083] The seal 4 can be a sealing ring, sealant, sealing strip, or foam, etc. In one example, the seal 4 can be a sealing ring, which seals against each side beam of the frame 111. In another example, the seal 4 is a sealing strip, which has multiple segments connected end to end and seals against the frame 111.

[0084] The height direction Z of the first housing 11 refers to the arrangement direction between the protective plate 3 and the connecting plate 112.

[0085] In one example, the weld 113 between the same first side beam 1111 and the connecting plate 112 is a single weld, extending continuously to both ends of the first side beam 1111. The length direction of the weld 113 is the same as the length direction of the first side beam 1111.

[0086] The connection methods between the protective plate 3 and the first housing 11 include, but are not limited to, bolt connection, stud connection or riveting.

[0087] The misalignment between the seal 4 and the weld 113 means that, along the height direction Z of the first housing 11, the projection of the seal 4 onto the first plane does not coincide with the projection of the weld 113 onto the first plane, and the first plane is coplanar with the bottom surface of the first side beam 1111. The dimension from the seal 4 to the weld 113 along the first direction X can be greater than or equal to zero. When the dimension from the seal 4 to the weld 113 along the first direction X is equal to zero, the seal 4 and the weld 113 are arranged adjacent to each other.

[0088] The width of weld 113 can be in the range of, but is not limited to, 8mm-10mm. The specific width of weld 113 can be reasonably designed according to the size of box 1 and the material of box 1.

[0089] By misaligning the seal 4 with the weld 113, the sealing surface of the first side beam 1111 facing the seal 4 can be kept flat, reducing the possibility that the unevenness of the weld 113 will affect the sealing effect at the joint between the first side beam 1111 and the seal 4, and improving the reliability of the seal between the seal 4 and the first side beam 1111.

[0090] In some embodiments, please refer to Figure 2 and Figure 4 Along the first direction X, weld 113 and seal 4 are spaced apart.

[0091] This allows the weld 113 to completely avoid the sealing surface of the first side beam 1111 facing the seal 4, thereby improving the reliability of the seal between the seal 4 and the first side beam 1111 during installation.

[0092] In some embodiments, please refer to Figure 2 The first side beam 1111 includes a body portion 11111 and a protruding portion 11112. The body portion 11111 is sealed to the sealing element 4. The protruding portions 11112 are respectively connected to the sides of the body portions 11111 of the two first side beams 1111 facing each other. The protruding portion 11112 of one first side beam 1111 is welded to one end of the connecting plate 112 and a weld 113 is provided at the welding position. The protruding portion 11112 of the other first side beam 1111 is welded to the other end of the connecting plate 112 and a weld 113 is provided at the welding position.

[0093] The bottom of the main body 11111 and the bottom of the protrusion 11112 can be flush or not flush.

[0094] Optionally, the protrusion 11112 can be a solid strip structure extending along the length direction of the first side beam 1111. The body portion 11111 can be a hollow structure extending along the length direction of the first side beam 1111.

[0095] The main body 11111 and the protruding part 11112 can be integrally formed, or they can be fixed by bolt connection or riveting.

[0096] By setting the protrusion 11112, the weld 113 can avoid the sealing surface of the first side beam 1111 facing the seal 4 along the first direction X. When installing the protective plate 3 and the seal 4, the seal 4 will not be in contact with the weld 113, so that the seal 4 can achieve a good sealing effect.

[0097] In some embodiments, please refer to Figure 2 The bottom of the protrusion 11112 is flush with the bottom of the main body 11111; and / or, the bottom of the connecting plate 112 is flush with the bottom of the protrusion 11112; and / or, the top of the connecting plate 112 is flush with the top of the protrusion 11112.

[0098] Optionally, the protrusion 11112 and the connecting plate 112 have the same dimension along the height direction Z of the first housing 11.

[0099] In one example, the connecting plate 112 and the protrusion 11112 are fixed by butt welding.

[0100] Since the protrusion 11112 is connected to the connecting plate 112, the position of the protrusion 11112 can change the position of the connecting plate 112 along the height direction Z of the first housing 11. By setting the bottom of the protrusion 11112 flush with the bottom of the main body 11111, compared with the bottom of the protrusion 11112 not flush with the bottom of the main body 11111, the structure of the first housing 11 is more compact, which helps to reduce the space occupied by the first housing 11 along its own height direction Z. Furthermore, without changing the thickness of the protrusion 11112 and the main body 11111, it is beneficial to increase the volume of the accommodating space jointly defined by the frame 111 and the connecting plate 112, thereby increasing the volumetric energy density of the battery device 100.

[0101] In some embodiments, please refer to Figure 2 Along the first direction X, the dimension of the first side beam 1111 is W1, the dimension of the seal 4 is W2, and the difference between W1 and W2 is greater than or equal to 4mm.

[0102] Therefore, when welding the first side beam 1111 to the connecting plate 112, the weld 113 can be arranged adjacent to or spaced apart from the seal 4 to reduce the possibility that the weld 113 will damage the sealing surface of the first side beam 1111 facing the seal 4 during the welding process, so that the seal 4 and the first side beam 1111 have better sealing performance during assembly.

[0103] In some embodiments, please refer to Figure 2 Along the first direction X, the size of the main body 11111 is W3, and W2 is less than or equal to W3.

[0104] In one example, the difference between W3 and W2 is greater than or equal to 3 mm.

[0105] Therefore, the weld 113 and the seal 4 can be spaced apart along the first direction X, which reduces the possibility of the seal 4 pressing on the weld 113 during installation, thereby achieving a better sealing effect between the seal 4 and the first side beam 1111.

[0106] In some embodiments, please refer to Figure 3 and Figure 4 The connecting plate 112 includes a plate body 1121 and a connecting part 1122. The plate body 1121 is connected to the two ends of the connecting part 1122 along the first direction X. Along the height direction Z of the first box 11, the size of the connecting part 1122 is larger than the size of the plate body 1121. The connecting part 1122 is welded to the first side beam 1111 and a weld 113 is provided at the welding position.

[0107] In one example, the plate body 1121 and the connecting part 1122 can be integrally formed by bending, that is, the plate body 1121 is connected to the connecting part 1122 by bending.

[0108] The connecting part 1122 can be bent upwards or downwards.

[0109] In another example, the plate body 1121 and the connecting part 1122 are fixed by welding. The plate body 1121 and the connecting part 1122 can be spaced apart at both ends along the height direction Z of the first box 11.

[0110] The connecting portion 1122 is larger than the plate body 1121, causing the connecting plate 112 to form a bent structure. The connecting portion 1122 is constructed as the bent edge of the connecting plate 112. By welding the connecting portion 1122 to the first side beam 1111, the mating surface between the sealing element 4 and the first side beam 1111 can be avoided, thereby reducing the impact of the weld 113 on the mating surface during assembly and improving the sealing performance. In addition, setting the connecting plate 112 as a bent structure helps to improve the overall strength of the first housing 11.

[0111] In some embodiments, please refer to Figure 3 The connecting part 1122 is located on the top of the plate body 1121. The top end of the connecting part 1122 is welded to the first side beam 1111. Along the height direction Z of the first box body 11, the weld 113 is spaced apart from the bottom of the first side beam 1111.

[0112] Therefore, the weld 113 formed by the connecting part 1122 and the first side beam 1111 can be spaced apart from the bottom of the first side beam 1111 along the height direction Z of the first box 11. During installation, the problem of poor sealing caused by the sealing element 4 abutting the weld 113 along the first direction X due to installation deviation can be ignored, thus making installation more convenient.

[0113] In some embodiments, please refer to Figure 3 The bottom of the plate body 1121 is flush with the bottom of the first side beam 1111.

[0114] Compared to the bottom of the plate body 1121 being higher than the bottom of the first side beam 1111, this increases the volume of the accommodating space defined by the frame 111 and the connecting plate 112, which is beneficial to improving the volumetric energy density of the battery device 100.

[0115] In some embodiments, please refer to Figure 4 The connecting part 1122 is located at the bottom of the plate body 1121, and the bottom of the connecting part 1122 is welded to the first side beam 1111.

[0116] This allows the connecting part 1122 to form a downward bending structure, thereby achieving a misalignment between the weld 113 and the seal 4, and also helps to improve the strength of the first housing 11.

[0117] In some embodiments, please refer to Figure 4 Each of the two first side beams 1111 has a positioning groove 11114 on the side facing each other, and at least part of the connecting part 1122 is provided in the positioning groove 11114, with the bottom of the connecting part 1122 welded to the groove wall of the positioning groove 11114.

[0118] In one example, the positioning groove 11114 includes a first wall, a second wall, and a third wall. The first and second walls are spaced apart and opposite to each other along the height direction Z of the first housing 11, with the first wall positioned above the second wall. Both the first and second walls are connected to the third wall. The first wall engages with the upper surface of the connecting plate 112 for positioning, and the second wall engages with the bottom of the connecting portion 1122 for positioning. The first and second walls are used to position the connecting plate 112 along the height direction Z of the first housing 11.

[0119] The cross-sectional shape of the positioning groove 11114 can be, but is not limited to, U-shaped, rectangular, V-shaped or trapezoidal, etc.

[0120] In one example, the first side beam 1111 includes a body portion 11111 and an extension portion 11113. The extension portion 11113 is located at the bottom of the body portion 11111 and is located inside the seal 4 along the first direction X. A portion of the positioning groove 11114 is formed in the extension portion 11113 and another portion is formed in the body portion 11111.

[0121] The positioning groove 11114 facilitates pre-positioning of the connecting part 1122 before welding, making the welding more accurate and reducing welding deviation.

[0122] In some embodiments, the connecting plate 112 has a heat exchange channel inside, which is configured to allow a heat exchange medium to pass through.

[0123] The two ends of the heat exchange channel penetrate the outer surface of the connecting plate 112 respectively, forming a heat exchange medium inlet and a heat exchange medium outlet. By introducing the heat exchange medium into the heat exchange channel, the heat exchange medium flows out from the heat exchange medium outlet, thereby achieving heat exchange with the battery cell 20, which is beneficial for regulating the operating temperature of the battery cell 20.

[0124] The heat exchange medium can be a liquid or a gas. For example, the heat exchange medium can be, but is not limited to, water or air.

[0125] Therefore, adjusting the operating temperature of the battery device 100 during operation, so that the battery device 100 operates at a suitable operating temperature, helps to improve the reliability of the battery device 100.

[0126] For ease of explanation, please refer to the following examples. Figure 5 The following description will be based on an example of an electrical device according to some embodiments of this application.

[0127] The electrical equipment includes the battery device 100 of the above embodiments, which is used to provide electrical energy to the electrical equipment.

[0128] Please refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0129] Since the electrical equipment includes all the technical features of the battery device 100 in the above embodiments, the effect is the same as described above, and will not be repeated here.

[0130] In an optional first embodiment of the battery device 100, please refer to Figure 2 The battery device 100 includes a housing 1, a protective plate 3, and a sealing element 4. The housing 1 includes a first housing 11, which includes a frame 111 and a connecting plate 112. The frame 111 includes two first side beams 1111 spaced apart along a first direction X. Each first side beam 1111 includes a body portion 11111 and a protruding portion 11112. The body portion 11111 is sealed to the sealing element 4. The protruding portions 11112 are respectively connected to the sides of the body portions 11111 of the two first side beams facing each other. The protruding portion 11112 of one first side beam 1111 is welded to one end of the connecting plate 112, and a weld 113 is provided at the welding position. The protruding portion 11112 of the other first side beam 1111 is welded to the other end of the connecting plate 112, and a weld 113 is provided at the welding position. The protective plate 3 is located at the bottom of the first housing 11 and connected to the first housing 11. A sealing element 4 is disposed between the protective plate 3 and the frame 111. The sealing element 4 is in sealing fit with both the protective plate 3 and the first side beam 1111. Along the first direction X, the sealing element 4 is spaced apart from the weld 113. The first direction X intersects with the height direction Z of the first housing 11, and the plane containing the first direction X and the height direction Z of the first housing 11 intersects with the length direction of the first side beam 1111. The bottom of the protrusion 11112 is flush with the bottom of the main body 11111, the bottom of the connecting plate 112 is flush with the bottom of the protrusion 11112, and the top of the connecting plate 112 is flush with the top of the protrusion 11112.

[0131] In an optional second embodiment of the battery device 100, please refer to Figure 3 Unlike the first embodiment, the first side beam 1111 does not include the protruding portion 11112. The connecting plate 112 includes a plate body 1121 and a connecting portion 1122. The plate body 1121 is connected to the connecting portions 1122 at both ends along the first direction X. Along the height direction Z of the first box 11, the size of the connecting portion 1122 is larger than the size of the plate body 1121. The connecting portion 1122 is welded to the first side beam 1111, and a weld 113 is provided at the welding position. The connecting portion 1122 and the first side beam 1111 form a bent structure, and the two are perpendicular. The connecting portion 1122 is located at the top of the plate body 1121. The top end of the connecting portion 1122 is welded to the first side beam 1111, and along the height direction Z of the first box 11, the weld 113 is spaced apart from the bottom of the first side beam 1111.

[0132] In an optional third embodiment of the battery device 100, please refer to Figure 4 Unlike the first embodiment, the connecting part 1122 is located at the bottom of the plate body 1121. The bottom of the connecting part 1122 is welded to the first side beam 1111. The two first side beams 1111 are respectively provided with positioning grooves 11114 on the side facing each other. At least part of the connecting part 1122 is located in the positioning groove 11114. The bottom of the connecting part 1122 is welded to the groove wall of the positioning groove 11114.

[0133] Through the above three specific embodiments, when welding the connecting plate 112 and the first side beam 1111, the weld 113 and the sealing element 4 can be staggered to ensure a better sealing fit between the sealing element 4 and the first side beam 1111 during assembly. The first and second embodiments allow for a more compact structure of the housing 1. Compared with the third embodiment, without changing the dimension of the first housing 11 along its height direction Z, it allows for a larger accommodating space to accommodate larger battery cells 20, which is beneficial for improving the volumetric energy density of the battery device 100.

[0134] 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: The box body (1) includes a first box body (11), the first box body (11) includes a frame (111) and a connecting plate (112), the frame (111) includes two first side beams (1111) spaced apart along a first direction (X), the two first side beams (1111) are welded to the two ends of the connecting plate (112) one by one and welds (113) are provided at the corresponding welding positions, the first direction (X) intersects with the height direction (Z) of the first box body (11), and the plane where the first direction (X) and the height direction (Z) of the first box body (11) are located intersects with the length direction of the first side beam (1111); A protective plate (3) is provided at the bottom of the first box (11) and connected to the first box (11); A sealing element (4) is disposed between the protective plate (3) and the frame (111). The sealing element (4) is sealed to the protective plate (3) and the first side beam (1111) respectively. Along the first direction (X), the sealing element (4) is offset from the weld (113).

2. The battery device according to claim 1, characterized in that, Along the first direction (X), the weld (113) and the seal (4) are spaced apart.

3. The battery device according to claim 1, characterized in that, The first side beam (1111) includes a body part (11111) and a protruding part (11112). The body part (11111) is sealed to the sealing member (4). The protruding parts (11112) are respectively connected to the sides of the body parts (11111) of the two first side beams (1111). The protruding part (11112) of one first side beam (1111) is welded to one end of the connecting plate (112) and the weld (113) is provided at the welding position. The protruding part (11112) of the other first side beam (1111) is welded to the other end of the connecting plate (112) and the weld (113) is provided at the welding position.

4. The battery device according to claim 3, characterized in that, The bottom of the protrusion (11112) is flush with the bottom of the body (11111); and / or, the bottom of the connecting plate (112) is flush with the bottom of the protrusion (11112); and / or, the top of the connecting plate (112) is flush with the top of the protrusion (11112).

5. The battery device according to claim 3, characterized in that, Along the first direction (X), the size of the first side beam (1111) is W1, the size of the seal (4) is W2, and the difference between W1 and W2 is greater than or equal to 4 mm.

6. The battery device according to claim 5, characterized in that, Along the first direction (X), the size of the body part (11111) is W3, and W2 is less than or equal to W3.

7. The battery device according to claim 1, characterized in that, The connecting plate (112) includes a plate body (1121) and a connecting part (1122). The plate body (1121) is connected to the connecting part (1122) at both ends along the first direction (X). Along the height direction (Z) of the first box (11), the size of the connecting part (1122) is larger than the size of the plate body (1121). The connecting part (1122) is welded to the first side beam (1111) and the weld (113) is provided at the welding position.

8. The battery device according to claim 7, characterized in that, The connecting part (1122) is located on the top of the plate body (1121). The top end of the connecting part (1122) is welded to the first side beam (1111), and along the height direction (Z) of the first box body (11), the weld (113) is spaced apart from the bottom of the first side beam (1111).

9. The battery device according to claim 8, characterized in that, The bottom of the plate body (1121) is flush with the bottom of the first side beam (1111).

10. The battery device according to claim 7, characterized in that, The connecting part (1122) is located at the bottom of the plate body (1121), and the bottom of the connecting part (1122) is welded to the first side beam (1111).

11. The battery device according to claim 10, characterized in that, The two first side beams (1111) are respectively provided with positioning grooves (11114) on the side facing each other, and at least part of the connecting part (1122) is provided in the positioning groove (11114), and the bottom of the connecting part (1122) is welded to the groove wall of the positioning groove (11114).

12. The battery device according to any one of claims 1-11, characterized in that, The connecting plate (112) has a heat exchange channel inside, which is configured to allow the passage of a heat exchange medium.

13. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-12, the battery device being used to provide electrical energy to the electrical equipment.

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