Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, and relates to the technical field of batteries, the battery device comprises a box body, a battery monomer and a reinforcing member, the box body is provided with a bottom plate and a plurality of side plates, the plurality of side plates are arranged at one side of the bottom plate in a surrounding manner and define a mounting cavity together with the bottom plate, at least part of the side plates are arranged as first side plates, and the reinforcing member is arranged in the mounting cavity; a reinforcing area is formed on the first side plate, and the reinforcing area is recessed inwards or outwards relative to the peripheral area of the reinforcing area; the battery monomers are arranged in the mounting cavities; the reinforcing piece is attached to the first side plate, and the arrangement position of the reinforcing piece at least corresponds to the reinforcing area of the first side plate. According to the technical scheme provided by the invention, the reinforcing piece is additionally attached to the first side plate, so that the impact resistance of the first side plate is improved, and the problem that a single-wall-plate box body of an existing battery device is easy to deform due to external impact, so that an internal battery monomer is damaged is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and an electric equipment. BACKGROUND

[0002] In the existing new energy vehicles, in order to meet the requirement of light weight, the single-wall plate box body is usually selected as the loading component. The side plate of the single-wall plate box body is formed by a single layer of wall plate, which makes the side plate of the single-wall plate box body have the advantages of lightness and thinness, but also has the disadvantage of poor impact resistance. When the vehicle is subjected to external impact, the side plate of the single-wall plate box body is easily deformed, thereby extruding the battery monomer loaded in the inside. CONTENT OF THE UTILITY MODEL

[0003] The main purpose of the present application is to provide a battery device and an electric equipment, which aims to improve the problem that the single-wall plate box body of the existing battery device is easily deformed under external impact and causes damage to the internal battery monomer.

[0004] In a first aspect, the battery device provided by the present application comprises:

[0005] The box body has a bottom plate and a plurality of side plates. The plurality of side plates are arranged around one side of the bottom plate and jointly define an installation cavity with the bottom plate. At least part of the side plates are arranged as first side plates. The first side plates are formed with a reinforcing area. The reinforcing area is arranged to be concave inward or outward relative to the surrounding area.

[0006] The battery monomer is arranged in the installation cavity.

[0007] The reinforcing member is arranged on the first side plate. The position of the reinforcing member corresponds to the reinforcing area of the first side plate.

[0008] The technical scheme provided by the present application forms the reinforcing area on the first side plate of the box body. The plate body structure of the reinforcing area is arranged to be concave inward or outward. To some extent, the strength of the first side plate is increased. On this basis, the reinforcing member is arranged on the first side plate. The reinforcing member is arranged on the first side plate corresponding to the reinforcing area of the first side plate, which is equivalent to increasing the thickness of the first side plate. Compared with the method of directly processing the first side plate with large thickness, the processing difficulty is reduced. At the same time, the first side plate can be further reinforced, which improves the problem that the single-wall plate box body of the existing battery device is easily deformed under external impact and causes damage to the internal battery monomer.

[0009] In some embodiments, the length of the reinforcing member is equivalent to the length of the first side plate in the circumferential direction.

[0010] The reinforcing member is arranged to have a length corresponding to the length of the first side plate, so as to provide continuous reinforcement to each position of the first side plate along the length direction of the first side plate, so as to prevent the formation of a weak point.

[0011] In some embodiments, the first side plate has a tensile strength greater than 1500 MPa.

[0012] The first side plate is made of a material having a tensile strength greater than 1500 MPa, so as to ensure the rigidity and strength of the first side plate, thereby improving the protection capability of the battery device against external impact.

[0013] In some embodiments, the material of the first side plate comprises a hot-formed steel.

[0014] The tensile strength is a parameter for measuring the deformation resistance of the hot-formed steel, and when the tensile strength reaches 1500 MPa, it means that the hot-formed steel belongs to a high-strength grade, so as to ensure that the first side plate has high deformation resistance when subjected to external impact.

[0015] In some embodiments, the reinforcing member is arranged on the inner side of the first side plate.

[0016] The reinforcing member is an additional reinforcing component arranged on the first side plate, and is arranged on the inner side of the first side plate. The relatively sealed environment formed in the mounting cavity can protect the reinforcing member, prevent the reinforcing member from being corroded by external harsh environments, and improve the reliability of the reinforcing member.

[0017] In some embodiments, the bottom plate has a side end in the first direction, and the side end of the bottom plate is arranged close to the side of the electrical equipment.

[0018] The first side plate is arranged corresponding to the side end of the bottom plate.

[0019] The first side plate is arranged corresponding to the side end of the bottom plate, so that after the battery device is installed on the electrical equipment, the first side plate can be arranged on the side of the electrical equipment. This allows the first side plate in the battery device to resist the impact when the electrical equipment is subjected to impact from the side, so as to protect the battery cells inside the battery device.

[0020] In some embodiments, the first side plate is arranged in two opposite directions along the first direction.

[0021] The reinforcing member is arranged in two opposite directions along the first direction.

[0022] The first side plate is arranged in two opposite directions along the first direction, which means that the battery device can provide impact protection on both sides in the first direction, so as to provide more perfect protection for the battery cells in the vehicle impact working condition.

[0023] In some embodiments, the reinforcing member is arranged on the inner side of the corresponding first side plate, and the local thickening of the reinforcing member is formed with an abutting portion;

[0024] The box further comprises a crossbeam, which is connected to the abutting portions of the two reinforcing members at the two ends along the first direction.

[0025] In the above-mentioned battery device, when one of the first side plates is subjected to an external impact, part of the impact energy is absorbed by the first side plate and the reinforcing member, and the rest of the impact energy is transmitted to the first side plate and the reinforcing member on the other side of the battery device through the crossbeam, so that the impact energy is absorbed to the maximum extent, and the severity of the impact on the battery monomer is reduced. Furthermore, the reinforcing member is formed with an abutting portion, and the abutting portion is in contact with the crossbeam, which further improves the strength of the reinforcing member at the abutting portion and prevents the reinforcing member from deforming when the impact energy is transmitted between the reinforcing member and the crossbeam.

[0026] In some embodiments, the bottom plate and the plurality of side plates are connected by welding or riveting.

[0027] In the above-mentioned battery device, the bottom plate and the plurality of side plates are connected by welding or riveting, so that the plurality of side plates and the bottom plate can be formed separately, thereby facilitating the processing of more complex and targeted structures on the specific side plate or bottom plate, such as the formation of a recess structure in the reinforcing area of the first side plate, thereby reducing the overall processing difficulty of the box.

[0028] In some embodiments, the adjacent two side plates are connected by welding.

[0029] In the above-mentioned battery device, the plurality of side plates are connected by welding, so that the plurality of side plates can be formed separately, thereby facilitating the processing of more complex and targeted structures on the specific side plate, such as the formation of a recess structure in the reinforcing area of the first side plate, thereby reducing the overall processing difficulty of the box, and the welding method is beneficial to improving the sealing performance of the box.

[0030] In a second aspect, the present application further provides a power consumption device, which comprises the above-mentioned battery device, and the battery device is used to provide electric energy. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0032] Figure 1 A structural diagram of an embodiment of a vehicle provided in the present application is shown in FIG. 1.

[0033] Figure 2 An exploded structural diagram of an embodiment of a battery device provided in the present application is shown in FIG. 2.

[0034] Figure 3 A three-dimensional structural diagram of an embodiment of a case in a battery device provided in the present application is shown in FIG. 3.

[0035] Figure 4 A three-dimensional structural diagram of an embodiment of a case in a battery device provided in the present application is shown in FIG. 3. Figure 3 A three-dimensional structural diagram of an embodiment of a case in a battery device provided in the present application is shown in FIG. 3.

[0036] Figure 5 A three-dimensional structural diagram of an embodiment of a case in a battery device provided in the present application is shown in FIG. 3. Figure 3 A three-dimensional structural diagram of an embodiment of a case in a battery device provided in the present application is shown in FIG. 3.

[0037] Figure 6 A three-dimensional structural diagram of an embodiment of a case in a battery device provided in the present application is shown in FIG. 3. Figure 5 A three-dimensional structural diagram of an embodiment of a case in a battery device provided in the present application is shown in FIG. 3.

[0038] BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 1000, vehicle; 100, battery device; 200, controller; 300, motor.

[0040] 1000, vehicle; 100, battery device; 200, controller; 300, motor.

[0041] 1, case; 1a, mounting cavity; 11, bottom plate; 12, side plate; 121, first side plate; 121a, reinforcing area; 2, reinforcing member; 21, abutting portion; 3, battery cell; 4, cover plate; X, first direction; Y, second direction.

[0042] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0043] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0045] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0046] Reference herein to "embodiments" means that a particular feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0048] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0049] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing", and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0050] In existing new energy vehicles, in order to meet the requirement of lightweight, a single-wall plate box body is usually selected as a loading component of a battery monomer. The side plate of the single-wall plate box body is formed by a single-wall plate. Compared with the side plate of an aluminum profile box body, the side plate of the single-wall plate box body has the advantages of being light and thin. However, the side plate of the single-wall plate box body has the disadvantage of poor impact resistance. When the vehicle is subjected to external impact, the side plate of the single-wall plate box body is prone to large deformation, and the battery monomer loaded in the single-wall plate box body is prone to damage due to extrusion, thereby causing serious accidents.

[0051] It can be known from the analysis of the causes of the above problems that the main reason why the battery monomer in the box body is extruded after the box body is subjected to external impact is that the strength of the box body is not enough, and the box body is prone to deformation. The strength of the box body can be increased to improve the protection performance. However, the performance advantage of lightweight and the poor impact resistance of the box body exist at the same time. If the thickness of the box body is increased to improve the impact resistance, the advantage of lightweight of the box body may be lost. Therefore, improvement needs to be made from other aspects to improve the above problems.

[0052] In the prior art, there are schemes for improving the impact resistance of the single-wall plate box body from other directions. For example, in some schemes, a collision prevention beam is arranged in the mounting cavity of the single-wall plate box body along the extension direction of the side plate. The collision prevention beam blocks the battery monomer and the side plate of the box body, can absorb the external impact energy borne by the side plate of the box body, and thus improves the impact resistance of the single-wall plate box body. However, this way of arranging the collision prevention beam usually requires the collision prevention beam to have high structural strength, and the collision prevention beam uses a large amount of metal materials, which greatly increases the overall weight of the single-wall plate box body and does not meet the design trend of lightweight and high energy density of the battery device. In another scheme, a plate material with a relatively large thickness is used to form the side plate of the box body. Although the increase in the thickness of the side plate of the box body directly improves the impact resistance of the side plate of the box body and enables the side plate of the box body to meet the protection requirement of the battery monomer, the thickness of the plate material used to form the side plate of the box body is usually uniform, which causes the thickness of each region of the side plate of the box body to be at a relatively large level. The regions include regions that do not need to provide impact protection, for example, the connection region of the side plate of the box body and the bottom plate and the connection region of the side plate of the box body and the cover plate of the box body. Therefore, the overall weight of the single-wall plate box body is greatly increased, and the design trend of lightweight and high energy density of the battery device is not met. However, in combination with the design idea of this scheme, a reinforcing plate can be additionally arranged on the region of the side plate of the box body that needs to resist impact, or the region can be arranged as a concave-convex region, so as to improve the impact resistance of the side plate of the box body.

[0053] The battery device disclosed in the embodiments of the present application can be used to provide electric energy for an electric device. The electric device can be, but is not limited to, a battery car, an electric vehicle, a ship, a spacecraft, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0054] The following embodiments are described by taking a vehicle 1000 as an example for convenience of illustration.

[0055] Please refer to Figure 1 , Figure 1 The structure diagram of an embodiment of the vehicle provided by the present application is shown. The vehicle 1000 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric vehicle, a hybrid vehicle or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation and driving.

[0056] In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0057] By applying the battery device 100 provided by the present application to the electric equipment, at least the problem that the single-wall box body of the existing battery device is easily deformed by external impact and causes damage to the internal battery monomer can be improved.

[0058] For the convenience of understanding the battery device 100 provided by the present application, the following is described in conjunction with the drawings, wherein, Figure 2 The exploded structure diagram of an embodiment of the battery device provided by the present application is shown. Figure 3 The three-dimensional structure diagram of an embodiment of the box body in the battery device provided by the present application is shown. Figure 4 The three-dimensional structure diagram of the first side plate in the first side plate is shown. Figure 3 The three-dimensional structure diagram of the first side plate in the first side plate is shown. Figure 5 The side view structure diagram of the box body in the first side plate is shown. Figure 3 The side view structure diagram of the box body in the first side plate is shown. Figure 6 The structure diagram of the cross section A-A in the first side plate is shown. Figure 5 The structure diagram of the cross section A-A in the first side plate is shown.

[0059] Please refer to Figures 2 to 4In an embodiment of the present application, the battery device 100 comprises a box 1, battery cells 3 and reinforcing members 2. The box 1 has a bottom plate 11 and a plurality of side plates 12, which are arranged on one side of the bottom plate 11 and together define an installation cavity 1a on the bottom plate 11. At least part of the side plates 12 are first side plates 121, which have reinforcing areas 121a formed thereon. The reinforcing areas 121a are concave inwardly or outwardly relative to their surrounding areas. The battery cells 3 are arranged in the installation cavity 1a. The reinforcing members 2 are arranged on the first side plates 121, and the positions of the reinforcing members 2 correspond to at least the reinforcing areas 121a of the first side plates 121.

[0060] It should be noted that the box 1 is a main loading component of the battery device 100. The battery device 100 is mounted on an electrical equipment through the box 1, and the battery cells 3 are arranged in the installation cavity 1a of the box 1 to store electric energy. The battery cells 3 can be completely arranged in the installation cavity 1a. In this case, the side plates 12 are at least higher than the battery cells 3. The battery cells 3 can also be partially arranged in the installation cavity 1a. In this case, the side plates 12 are lower than the battery cells 3. Regardless of whether the side plates 12 are higher or lower, the box 1 can at least provide protection for the battery cells 3 from the side and the bottom. Generally, please refer to Figure 2 The battery device 100 further comprises a cover plate 4, which is arranged on the box 1 to shield the opening of the installation cavity 1a.

[0061] The plurality of side plates 12 are arranged on one side of the bottom plate 11 to define the installation cavity 1a. This means that one side of the height direction of the plurality of side plates 12 is arranged on the bottom plate 11, thereby surrounding a space on the bottom plate 11, which is open in the height direction of the space, and the space is the installation cavity 1a. Since the installation cavity 1a is formed by the surrounding of the plurality of side plates 12 and the bottom plate 11, the plurality of side plates 12 are closely related to the shape of the installation cavity 1a in terms of composition and shape and size. For example, if the cross section of the installation cavity 1a is circular, it means that the plurality of side plates 12 form a circular frame. For another example, if the cross section of the installation cavity 1a is square, it means that the plurality of side plates 12 form a square frame. It is worth mentioning that in the box 1 of the embodiment, the plurality of side plates 12 and the bottom plate 11 can be integrally formed, or can be separately formed and connected by bolts or welding.

[0062] “at least part of the side plates 12 are provided as first side plates 121” means that one of the side plates 12 can be provided as the first side plate 121, two of the side plates 12 can be provided as the first side plate 121, or even all of the side plates 12 are provided as the first side plate 121; “the first side plate 121 is formed with a reinforcing area 121a”, wherein the number of the reinforcing areas 121a can be multiple, for example, multiple reinforcing areas 121a are arranged along the extension direction of the first side plate 121, or multiple reinforcing areas 121a are arranged along the height direction of the first side plate 121, which is not limited in the embodiment; “the reinforcing area 121a is recessed inwardly or outwardly relative to its peripheral area”, wherein “inwardly” and “outwardly” are relative to the mounting cavity 1a, the inner side of the first side plate 121 refers to the side facing the mounting cavity 1a, and the outer side refers to the side away from the mounting cavity 1a; “the reinforcing area 121a is recessed” should be understood as that the reinforcing area 121a is recessed on one side of the first side plate 121 as a whole, so as to be raised on the other side of the first side plate 121, and should not be understood as that a groove is formed in the reinforcing area 121a; it can be understood that the recessed arrangement of the reinforcing area 121a can strengthen the first side plate 121, so as to improve its impact resistance; please refer to Figure 3 In the embodiment, the reinforcing areas 121a formed on the first side plate 121 of the box body 1 are all outwardly recessed, which are usually formed by stamping.

[0063] In the battery device 100, a plurality of battery monomers 3 are usually included, which can be connected in series, in parallel, or in a mixed manner. The mixed manner means that the plurality of battery monomers 3 are connected in series and in parallel. The plurality of battery monomers 3 can be directly connected in series, in parallel, or in a mixed manner, and then the plurality of battery monomers 3 are contained in the mounting cavity 1a of the box body 1 as a whole; of course, the plurality of battery monomers 3 can be connected in series, in parallel, or in a mixed manner to form a battery module, and then a plurality of battery modules are connected in series, in parallel, or in a mixed manner to form the battery monomer 3, and are contained in the mounting cavity 1a of the box body 1. The battery device 100 can also include other structures, for example, the battery device 100 can also include a current collecting component for realizing electrical connection between the plurality of battery monomers 3 or the plurality of battery modules, and can also include a heat exchange component for realizing heat control of the battery monomer 3. Each battery monomer 3 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery monomer 3 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes.

[0064] The "reinforcing member 2" refers to a component capable of increasing the thickness of a local area of the first side plate 121, and the local area at least includes the reinforcing area 121a of the first side plate 121. Since the first side plate 121 is not a flat plate and the reinforcing area 121a is arranged in a recessed manner, the "reinforcing member 2 is arranged in contact with the first side plate 121" can be understood as that the reinforcing member 2 is in overall contact with the local area corresponding to the first side plate 121, and the shapes of the two are consistent in the local area, that is, the reinforcing area 121a of the first side plate 121 is also arranged in a recessed manner to ensure that the reinforcing member 2 and the first side plate 121 form an overall structure and jointly resist external impact. In processing, the reinforcing member 2 and the first side plate 121 can be formed by using the same stamping die before and after stamping, or they can be fixed together in advance and then formed by overall stamping. In the connection mode, the application does not make any limitation, and the reinforcing member 2 and the first side plate 121 can be connected by welding or riveting. The reinforcing member 2 can be made of the same material as the first side plate 121, or a material with higher tensile strength than the first side plate 121. The application does not make any limitation on the material of the reinforcing member 2. In the direction from outside to inside, the reinforcing member 2 needs to coincide with the battery monomer 3 arranged in the mounting cavity 1a.

[0065] The technical scheme provided by the application forms the reinforcing area 121a on the first side plate 121 of the box body 1, and arranges the plate body structure of the reinforcing area 121a in a recessed manner towards the inside of the mounting cavity 1a or away from the outside of the mounting cavity 1a, which increases the strength of the first side plate 121 to a certain extent. On this basis, the reinforcing member 2 is arranged on the first side plate 121, and the reinforcing member 2 is in contact with the first side plate 121 along with the reinforcing area 121a of the first side plate 121, which is equivalent to increasing the thickness of the first side plate 121. Compared with the method of directly processing the first side plate 121 with a large thickness, this arrangement reduces the processing difficulty, and further reinforces the first side plate 121, which improves the problem that the single-walled box body 1 of the existing battery device 100 is easily deformed by external impact and causes damage to the internal battery monomer 3.

[0066] In some embodiments, the length of the reinforcing member 2 is adapted to the length of the first side plate 121 around the circumference of the plurality of side plates 12.

[0067] It should be noted that the "circumferential direction around the plurality of side plates 12" refers to the circumferential direction around the annular structure formed by the plurality of side plates 12. Since each side plate 12 needs to be connected to another two side plates 12 at both ends, for the first side plate 121, the "circumferential direction" also refers to the opposite direction of the two ends, in which the length of the reinforcing member 2 is comparable to the length of the first side plate 121, or in other words, the reinforcing member 2 is equal in length to the first side plate 121.

[0068] According to the above technical solution, the length of the reinforcing member 2 is set to be comparable to the length of the first side plate 121, which can provide continuous reinforcement to each position of the first side plate 121 in the length direction to prevent the formation of a weak point.

[0069] In some embodiments, the tensile strength of the first side plate 121 is greater than 1500 MPa.

[0070] It should be noted that the "tensile strength" refers to the critical value at which the metal transitions from uniform plastic deformation to local concentrated plastic deformation, and is also the maximum load-carrying capacity of the metal under static tension. The tensile strength represents the resistance of the material to maximum uniform plastic deformation. Before the tensile specimen bears the maximum tensile stress, the deformation is uniform and consistent, but after that, the metal begins to neck down, i.e., concentrated deformation occurs. For brittle materials that have little (or no) uniform plastic deformation, it reflects the material's fracture resistance. This embodiment sets a certain requirement for the tensile strength of the first side plate 121, but does not limit the specific material of the first side plate 121.

[0071] According to the above technical solution, the first side plate 121 is made of a material with a tensile strength greater than 1500 MPa, which can ensure the stiffness and strength of the first side plate 121, thereby improving the protection capability of the box body 1 for the battery monomer 3 when subjected to external impact.

[0072] In some embodiments, the material of the first side plate 121 includes hot-formed steel.

[0073] It should be noted that hot-formed steel is a high-strength steel that improves its strength through a process of heating and rapid cooling. The tensile strength, as a parameter for measuring the anti-deformation capability of hot-formed steel, means that the hot-formed steel belongs to the high-strength level when it reaches 1500 MPa, ensuring that the first side plate 121 has high anti-deformation capability when subjected to external impact.

[0074] Please refer to Figure 3 , Figure 4 and Figure 6 In some embodiments, the reinforcing member 2 is arranged on the inner side of the first side plate 121.

[0075] It should be noted that the above embodiments have explained the concept of the inner side and the outer side of the first side plate 121, and the inner side of the first side plate 121 refers to the side facing the installation cavity 1a.

[0076] According to the above technical solution, the reinforcing member 2 is an additional reinforcing component arranged on the first side plate 121, and is arranged on the inner side of the first side plate 121. The relatively sealed environment formed in the installation cavity 1a can protect the reinforcing member 2, prevent the reinforcing member 2 from being corroded by the external harsh environment, and improve the reliability of the reinforcing member 2.

[0077] Please refer to Figure 3 and Figure 4 In some embodiments, the bottom plate 11 has a side end in the first direction X, and the side end of the bottom plate 11 is arranged close to the side of the electrical equipment; and the first side plate 121 is arranged corresponding to the side end of the bottom plate 11.

[0078] It should be noted that the electrical equipment loaded with the battery device 100 usually belongs to a device capable of running, such as a vehicle, and the side of the vehicle in the width direction is a part prone to collision accidents; after the battery device 100 of the embodiment is correctly installed on the vehicle, the side end of the bottom plate 11 of the box 1 is generally close to the side of the vehicle in the width direction; the bottom plate 11 usually has two opposite side ends in the first direction X, and the "first side plate 121 arranged corresponding to the side end of the bottom plate 11" can be understood as that the first side plate 121 is arranged corresponding to one side end of the bottom plate 11, or that the first side plate 121 is arranged corresponding to two side ends respectively.

[0079] According to the above technical solution, the first side plate 121 is arranged corresponding to the side end of the bottom plate 11, and after the battery device 100 is installed on the electrical equipment 1000, the first side plate 121 can be arranged corresponding to the side of the electrical equipment 1000, which makes the first side plate 121 in the box 1 of the battery device 100 have the ability to resist the impact when the electrical equipment 1000 encounters the impact from the side, so as to protect the battery monomer 3 loaded in the box 1.

[0080] Please refer to Figure 3 In some embodiments, the first side plate 121 is arranged in two opposite directions along the first direction X; and the reinforcing member 2 is arranged in two corresponding directions.

[0081] It should be noted that in the embodiment, the first side plate 121 and the reinforcing member 2 are one-to-one corresponding and arranged in two groups along the first direction X, and the positions of the reinforcing member 2 on the first side plate 121 include the inner side and the outer side, and the two reinforcing members 2 can be arranged on the inner side or the outer side of the first side plate 121 at the same time, or one on the inner side and one on the outer side of the corresponding first side plate 121.

[0082] According to the technical solution, the two first side plates 121 are arranged oppositely along the first direction X, which means that the battery device 100 can provide impact protection on both sides along the first direction X, and can provide more perfect protection for the battery monomer 3 under the impact working condition of the vehicle.

[0083] Please refer to Figure 3 In some embodiments, the reinforcing member 2 is arranged on the inner side of the corresponding first side plate 121, and the local thickening of the reinforcing member 2 forms an abutting portion 21; the box body 1 further comprises a cross beam, and the two ends of the cross beam along the first direction X are respectively connected to the abutting portions 21 of the two reinforcing members 2.

[0084] It should be noted that although the reinforcing member 2 is recessed along with the recess of the first side plate 121, the thickness of the reinforcing member 2 is generally uniform in most areas, wherein the local thickening of the reinforcing member 2 forms the abutting portion 21, which means that the thickness of the local area of the reinforcing member 2 is greater than that of the other most areas; in order to ensure the fit of the reinforcing member 2 and the first side plate 121, the direction of the local thickening of the reinforcing member 2 is away from the first side plate 121, that is, the side of the reinforcing member 2 away from the first side plate 121 forms a protruding abutting portion 21, which functions to receive the end of the cross beam (the cross beam is not shown in the figure). Figure 3 The two ends of the cross beam along the first direction X are respectively connected to the abutting portions 21 of the two reinforcing members 2, which means that the abutting portions 21 of the two reinforcing members 2 are in position and coincide along the first direction X; generally, the number of cross beams is related to the extension length of the first side plate 121, when the first side plate 121 extends greatly along the second direction Y intersecting the first direction X, more battery monomers 3 can be loaded in the mounting cavity 1a along the second direction Y, which means that the middle part of the first side plate 121 lacks a fulcrum and the ability to resist deformation is reduced; in this case, multiple sets of the cross beam and the abutting portion 21 of the reinforcing member 2 need to be arranged in pairs along the second direction Y.

[0085] According to the technical solution, by arranging the cross beam in the mounting cavity 1a along the first direction X, and connecting the two ends of the cross beam to the reinforcing members 2 on the inner sides of the two first side plates 121, when one of the first side plates 121 of the battery device 100 encounters external impact, part of the impact energy is absorbed by the first side plate 121 and the reinforcing member 2, and the remaining part of the impact energy is transmitted to the first side plate 121 and the reinforcing member 2 on the other side of the battery device 100 through the cross beam, thereby absorbing the impact energy to the greatest extent and reducing the severity of the impact on the battery monomer 3; Furthermore, the reinforcing member 2 forms the abutting portion 21, and the abutting portion 21 contacts the cross beam, which further improves the strength of the reinforcing member 2 at the abutting portion 21, preventing the reinforcing member 2 from deforming when the impact energy is transmitted between the reinforcing member 2 and the cross beam.

[0086] In some embodiments, the bottom plate 11 and the plurality of side plates 12 are connected by welding or riveting.

[0087] It should be noted that the connection between the bottom plate 11 and the plurality of side plates 12 can all be welded, or all be riveted, or even partially welded and partially riveted.

[0088] According to the above technical solution, the bottom plate 11 and the plurality of side plates 12 are connected by welding or riveting, so that the plurality of side plates 12 and the bottom plate 11 can be formed separately, so as to process more complex and targeted structures on the specific side plate 12 or the bottom plate 11, for example, forming a recess structure in the reinforcing area 121a of the first side plate 121, which reduces the overall processing difficulty of the box body 1.

[0089] In some embodiments, the two adjacent side plates 12 are connected by welding.

[0090] According to the above technical solution, the plurality of side plates 12 are connected by welding, so that the plurality of side plates 12 can be formed separately, so as to process more complex and targeted structures on the specific side plate 12, for example, forming a recess structure in the reinforcing area 121a of the first side plate 121, which reduces the overall processing difficulty of the box body 1, and the welding method is beneficial to improve the sealing performance of the box body 1.

[0091] The application also provides a power utilization device, which comprises the battery device 100 for providing electric energy, and the specific structure of the battery device 100 is referred to the above embodiments. Since the power utilization device adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. The battery device 100 is used to provide electric energy for the power utilization device, which includes but is not limited to new energy vehicles such as pure electric vehicles, hybrid electric vehicles and extended range electric vehicles, and engineering vehicles such as electric excavators and electric bulldozers, and can also include aircraft such as electric unmanned aerial vehicles and electric passenger aircraft.

[0092] The application provides a battery device 100, which comprises a box body 1, battery monomers 3 and reinforcing members 2. The box body 1 has a bottom plate 11 and a plurality of side plates 12, the plurality of side plates 12 are arranged on one side of the bottom plate 11 and are welded or riveted to the bottom plate 11, two adjacent side plates 12 are welded to each other to define a mounting cavity 1a, the battery monomers 3 are arranged in the mounting cavity 1a, and the plurality of side plates 12 comprise first side plates 121 which are oppositely arranged along a first direction X. The material of the first side plates 121 comprises hot-formed steel with a tensile strength greater than 1500 MPa. The first side plates 121 are provided with reinforcing areas 121a, the reinforcing areas 121a are inwardly or outwardly recessed relative to the peripheral areas, two reinforcing members 2 are arranged and are attached to the corresponding first side plates 121, and the reinforcing members 2 are arranged at least at the reinforcing areas 121a of the first side plates 121.

[0093] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application, and they should be covered in the scope of the claims and the specification of the application. Especially, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a box body having a bottom plate and a plurality of side plates, the plurality of side plates being arranged around one side of the bottom plate and jointly defining a mounting cavity with the bottom plate, at least part of the side plates being arranged as first side plates, the first side plates being formed with reinforcing areas which are inwardly or outwardly recessed relative to their peripheral areas; a plurality of battery monomers arranged in the mounting cavity; and reinforcing members arranged on the first side plates and corresponding to the reinforcing areas of the first side plates.

2. The battery device of claim 1, wherein The reinforcing members have a length corresponding to that of the first side plates in the circumferential direction of the plurality of side plates.

3. The battery device of claim 1, wherein The tensile strength of the first side plates is greater than 1500 MPa.

4. The battery device of claim 3, wherein The material of the first side plates comprises hot-formed steel.

5. The battery device of claim 1, wherein The reinforcing members are arranged on the inner sides of the first side plates.

6. The battery device of claim 1, wherein The bottom plate has a side end in a first direction, and the side end of the bottom plate is arranged close to the side of the electrical equipment. The first side plates correspond to the side end of the bottom plate.

7. The battery device of claim 6, wherein The first side plates are oppositely arranged along the first direction. The reinforcing members are correspondingly arranged.

8. The battery device of claim 7, wherein The reinforcing members are arranged on the inner sides of the corresponding first side plates, and the reinforcing members are partially thickened to form abutting portions. The box body further comprises a cross beam, and the two ends of the cross beam along the first direction are respectively connected to the abutting portions of the two reinforcing members.

9. The battery device according to any one of claims 1 to 6, wherein The bottom plate and the plurality of side plates are connected by welding or riveting.

10. The battery device according to any one of claims 1 to 6, wherein Two adjacent side plates are connected by welding.

11. An electrical device, characterized by The battery device is used to provide electric energy.

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