Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment, and relates to the technical field of batteries. The battery device comprises a box body and single batteries installed in the box body, the box body comprises a bottom plate assembly and side walls connected to the periphery of the bottom plate assembly, the bottom plate assembly comprises a first plate and an energy absorption part, the first plate is connected to the side walls, and a containing cavity for containing the single batteries is defined by the first plate and the side walls; the energy absorption part is mounted on the first plate and located between the battery monomers and the first plate, the energy absorption part is provided with an energy absorption cavity, and the energy absorption part is configured to absorb at least part of pressure transmitted from the first plate to the battery monomers. According to the battery box, the energy absorption part is additionally arranged on the bottom plate assembly of the box body, and when the first plate is vibrated or deforms towards the direction of the single battery, the energy absorption part can be utilized to absorb the pressure transmitted from the first plate to the single battery, so that the influence of the pressure on the single battery is reduced, and the stability of the single battery mounted in the box body is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a battery device and an electrical equipment. Background Art

[0002] Batteries are widely used in electronic devices, such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes and power tools, etc.

[0003] The battery includes a battery case and battery cells located in the battery case. When the battery case is vibrated or deformed, it will exert pressure on the battery cells, affecting the performance of the battery cells. Therefore, how to reduce the pressure transmitted from the case to the battery cells is a research direction in battery technology. Utility Model Content

[0004] The present application provides a battery device and an electrical device, which can reduce the pressure transmitted from a box to a battery cell.

[0005] In a first aspect, an embodiment of the present application provides a battery device, comprising a box body and a battery cell installed in the box body, the box body comprising a bottom plate assembly, side walls and a support beam, the side walls comprising a first side wall and a second side wall arranged opposite to each other, the support beam being connected to the first side wall and the second side wall, respectively, wherein the bottom plate assembly comprises a first plate member and an energy absorbing member, the first plate member being connected to the side wall and forming together with the side wall a accommodating cavity for accommodating the battery cell; the energy absorbing member being installed on the first plate member and located between the battery cell and the first plate member, the energy absorbing member being provided with an energy absorbing cavity, and the energy absorbing member being configured to deform and absorb at least part of the pressure transmitted from the first plate member to the battery cell.

[0006] By adopting the above technical solution, an energy absorbing member is added to the bottom plate assembly of the box body. When the first plate member is vibrated or deformed in the direction of the battery cell, the energy absorbing member uses its own energy absorbing cavity to deform to absorb the pressure transmitted from the first plate member to the battery cell, thereby reducing the impact of the pressure on the battery cell and improving the stability of the battery cell installed in the box body; in addition, the first side wall and the second side wall are supported and connected by a support beam, which can improve the structural strength and stability of the side wall.

[0007] In some embodiments of the present application, the bottom plate assembly further includes a second plate connected to the side wall and located between the battery cell and the energy absorbing member, and a surface of the energy absorbing member facing away from the first plate is connected to the second plate.

[0008] By adopting the above technical solution, a second plate is provided between the battery cell and the energy absorbing member, and the energy absorbing member can absorb the vibration and deformation transmitted from the first plate to the second plate, thereby reducing the vibration and deformation transmitted from the second plate to the battery cell.

[0009] In some embodiments of the present application, a plurality of flow channels are provided in the second plate, and the flow channels are filled with a coolant.

[0010] By adopting the above technical solution, a plurality of flow channels are provided in the second plate, and the flow channels are filled with coolant, so that the second plate forms a water-cooling structure, thereby being able to cool the battery cells and reduce the possibility of the battery cells being affected in performance due to excessive temperature.

[0011] In some embodiments of the present application, the energy absorbing member is integrally connected to the first plate member and / or the second plate member.

[0012] By adopting the above technical solution, the energy absorbing member is integrally connected to the first plate member, which can improve the connection stability between the two and enable the energy absorbing member to better absorb the vibration and deformation of the first plate member, and can also enhance the structural strength of the entire bottom plate assembly; similarly, the energy absorbing member is integrally connected to the second plate member, which can improve the connection stability between the two and further enhance the structural strength of the entire bottom plate assembly.

[0013] In some embodiments of the present application, a receiving groove is provided on a surface of the first plate member facing the second plate member, and the second plate member and the energy absorbing member are located in the receiving groove.

[0014] By adopting the above technical solution, the energy absorbing member and the second plate are accommodated by the accommodating groove, which not only facilitates the installation of the energy absorbing member and the second plate and does not occupy the space of the accommodating cavity, but also enables the first plate, the second plate and the energy absorbing member to form an integral bottom plate assembly structure through the accommodating groove after being connected.

[0015] In some embodiments of the present application, the second plate abuts against the support beam.

[0016] By adopting the above technical solution, the second plate is abutted against the support beam, and the support beam is used to support the second plate, thereby improving the structural stability of the second plate.

[0017] In some embodiments of the present application, the support beam and the energy absorbing member are staggered along a first direction, and the first direction is an arrangement direction from the energy absorbing member to the first plate.

[0018] By adopting the above technical solution, the support beam and the energy absorbing member are staggered along the first direction, the support beam supports a small part of the second plate, and the energy absorbing member can support the rest of the second plate. The use of the support beam can reduce the volume and consumables of the energy absorbing member and reduce production costs.

[0019] In some embodiments of the present application, the energy absorbing member includes a first wall, a second wall and an energy absorbing structure, the first wall and the second wall are arranged at intervals along a first direction, the energy absorbing structure is provided with the energy absorbing cavity, the first direction is the arrangement direction of the energy absorbing member to the first plate, the first wall is against the first plate, and the energy absorbing structure is connected between the first wall and the second wall.

[0020] By adopting the above technical solution, the energy absorbing member is designed to be a first wall, a second wall and an energy absorbing structure. When the energy absorbing member absorbs vibration and deformation, the first wall is used to connect the first plate, the second wall is used to support the battery cell or the second plate, and the energy absorbing structure uses its own energy absorbing cavity between the first wall and the second wall to absorb energy by deformation. The structure is simple and the energy absorption effect is good.

[0021] In some embodiments of the present application, the energy absorbing structure includes a plurality of first energy absorbing parts, the plurality of first energy absorbing parts are arranged at intervals along a second direction, at least one energy absorbing cavity is enclosed between two adjacent first energy absorbing parts, and the second direction intersects with the first direction.

[0022] By adopting the above technical solution, the energy absorption structure is designed to include multiple first energy absorption parts. The multiple first energy absorption parts can better support the first wall and the second wall. At the same time, the multiple first energy absorption parts absorb energy at the same time, and the energy absorption effect is better. In addition, an energy absorption cavity is provided between two adjacent first energy absorption parts. The first energy absorption part can enter the energy absorption cavity when deformed during energy absorption, so that the energy absorption cavity is deformed, thereby improving the energy absorption effect.

[0023] In some embodiments of the present application, the energy absorption structure also includes a plurality of second energy absorption parts, wherein the plurality of second energy absorption parts are arranged at intervals along the second direction and are alternately arranged with the plurality of first energy absorption parts along the second direction, and each of the second energy absorption parts is respectively connected to two adjacent first energy absorption parts and is located in the energy absorption cavity between two adjacent first energy absorption parts.

[0024] By adopting the above technical solution, the second energy absorbing part is designed to be located in the energy absorbing cavity between two adjacent first energy absorbing parts and connect the two adjacent first energy absorbing parts, which can improve the structural strength and stability of the first energy absorbing part and reduce the possibility of deformation of the first energy absorbing part during smaller vibrations.

[0025] In some embodiments of the present application, each of the first energy absorbing parts itself is provided with at least one energy absorbing cavity.

[0026] By adopting the above technical solution, the first energy absorbing part itself is provided with an energy absorbing cavity. When the energy absorbing member absorbs energy, the first energy absorbing part can change the shape of the energy absorbing cavity by deforming itself to absorb energy.

[0027] In some embodiments of the present application, on a cross section parallel to the first direction and the second direction, the cross-sectional shape of the energy absorbing structure is grid-like, wavy, or sawtooth-like, and the second direction intersects with the first direction.

[0028] By adopting the above technical solution, the cross-sectional shape of the energy absorbing structure is designed to be grid-shaped, wavy or sawtooth-shaped. The grid-shaped, wavy or sawtooth-shaped has more energy absorbing cavities, which can further improve the energy absorbing effect.

[0029] In some embodiments of the present application, the energy absorbing cavity is provided with energy absorbing material.

[0030] By adopting the above technical solution, the energy absorbing cavity is filled with energy absorbing material. When the energy absorbing member absorbs energy, the energy absorbing material can absorb energy, thereby improving the energy absorbing effect and reducing the possibility of collapse and deformation of the energy absorbing cavity.

[0031] In some embodiments of the present application, the energy absorbing member further includes a third wall and a fourth wall, the third wall being located on one side of the first wall and the second wall along a second direction intersecting the first direction, and being connected to the first wall and the second wall respectively, and the fourth wall being located on the other side of the first wall and the second wall along the second direction, and being connected to the first wall and the second wall respectively.

[0032] By adopting the above technical solution, the energy absorbing member is designed to also include a third wall and a fourth wall. The first wall body, the second wall body, the third wall and the fourth wall form an energy absorbing box with open ends. The third wall and the fourth wall can assist in energy absorption and provide a better energy absorption effect.

[0033] In some embodiments of the present application, at least one energy absorbing cavity is provided between the third wall and the energy absorbing structure, and / or at least one energy absorbing cavity is provided between the fourth wall and the energy absorbing structure.

[0034] By adopting the above technical solution, an energy absorbing cavity is provided between the third wall and the energy absorbing structure, or an energy absorbing cavity is provided between the fourth wall and the energy absorbing structure, so that the number of energy absorbing cavities can be increased and a better energy absorbing effect can be provided.

[0035] In a second aspect, an embodiment of the present application provides an electrical device, including the above-mentioned battery, and the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0037] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0038] Figure 2 A schematic diagram of a battery device provided in some embodiments of the present application;

[0039] Figure 3 An exploded view of a box of a battery device provided in some embodiments of the present application;

[0040] Figure 4 A schematic diagram of the structure of a box of a battery device provided in some embodiments of the present application;

[0041] Figure 5 for Figure 4 AA cross-section diagram;

[0042] Figure 6 for Figure 5 A magnified view of part a;

[0043] Figure 7 for Figure 4 BB cross-section diagram;

[0044] Figure 8 for Figure 7 A magnified view of part b;

[0045] Fig. 9 A schematic structural diagram of a first energy absorbing member of a battery device provided in some embodiments of the present application;

[0046] Fig.10 A schematic structural diagram of a second energy absorbing member of a battery device provided in some embodiments of the present application;

[0047] Fig.11 A schematic structural diagram of a third energy absorbing member of a battery device provided in some embodiments of the present application;

[0048] Fig.12 A schematic structural diagram of a fourth energy absorbing member of a battery device provided in some embodiments of the present application;

[0049] Fig.13 A schematic structural diagram of a fifth energy absorbing member of a battery device provided in some embodiments of the present application;

[0050] Fig.14 A schematic structural diagram of a sixth energy absorbing member of a battery device provided in some embodiments of the present application.

[0051] The reference numerals of the specific embodiments are as follows:

[0052] 1000. Vehicles;

[0053] 100. Battery device;

[0054] 10. Box body;

[0055] 1. first part; 11. bottom plate assembly; 111. first plate; 1111. receiving groove; 112. energy absorbing member; 1120. energy absorbing cavity; 1121. first wall; 1122. second wall; 1123. energy absorbing structure; 11231. first energy absorbing part; 11232. second energy absorbing part; 1124. energy absorbing material; 1125. third wall; 1126. fourth wall; 113. second plate; 1131. flow channel; 12. side wall; 121. first side wall; 122. second side wall; 13. receiving cavity; 14. support beam;

[0056] 2. Part II;

[0057] 20. Battery cells;

[0058] 200, controller;

[0059] 300, motor;

[0060] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0062] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0063] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may 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 refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0064] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0065] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, H and / or B can represent: H exists alone, H and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0066] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0067] The term “plurality” used in this application refers to two or more (including two).

[0068] In the present application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, etc., and the embodiments of the present application do not limit this. The battery cell may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this.

[0069] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0070] The battery cell mentioned in the embodiments of the present application may include an electrode assembly and an electrolyte, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive current collector and a positive active material layer, and the positive active material layer is coated on the surface of the positive current collector; the positive current collector includes a positive electrode coating area and a positive electrode ear connected to the positive electrode coating area, the positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode ear is not coated with a positive electrode active material layer. Taking a lithium-ion battery cell as an example, the material of the positive current collector can be aluminum, and the positive electrode active material layer includes a positive electrode active material, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area, and the negative electrode coating area is coated with a negative electrode active material layer, and the negative electrode tab is not coated with a negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material can be carbon or silicon, etc. The material of the separator can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.

[0071] At present, the application of battery devices is becoming more and more extensive. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of battery devices, the market demand is also constantly expanding.

[0072] A battery device generally includes a battery box and a battery cell located in the box. The battery box is used to withstand external impact and pressure, protect the internal components from physical damage, and reduce the risk of collision or falling. However, the structural strength of the bottom plate assembly of the battery box in the related art needs to be improved, and the impact and pressure of the bottom plate assembly are easily transmitted to the battery cell, which affects the performance of the battery cell.

[0073] Therefore, how to reduce the impact and pressure transmitted to the battery cell by the bottom plate assembly is an important topic in the research and development of the battery cell and its related components.

[0074] In view of this, the present application provides a technical solution, in which an energy absorbing member is configured on the bottom plate assembly, which is used to absorb the pressure transmitted from the bottom plate assembly to the battery cell and can improve the overall structural strength of the bottom plate assembly, thereby solving the above technical problems.

[0075] The battery cells described in the embodiments of the present application are suitable for batteries and electrical equipment using the batteries.

[0076] Electrical equipment may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools, and the like. Vehicles may be fuel vehicles, gas vehicles, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, and the like; spacecraft include airplanes, rockets, space shuttles, and spacecraft, and the like; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment.

[0077] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0078] Combined with Figure 1 As shown, the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is arranged inside the vehicle 1000, and the battery device 100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for the starting, navigation and driving power requirements of the vehicle 1000.

[0079] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0080] Combined with Figure 2-4As shown, an embodiment of the present application provides a battery device 100, including a box body 10 and a battery cell 20 installed in the box body 10, the box body 10 includes a bottom plate assembly 11, a side wall 12 and a support beam 14, the side wall 12 includes a first side wall 121 and a second side wall 122 arranged opposite to each other, the support beam 14 is respectively connected to the first side wall 121 and the second side wall 122, the bottom plate assembly 11 includes a first plate member 111 and an energy absorbing member 112, the first plate member 111 is connected to the side wall 12, and together with the side wall 12, forms a accommodating cavity 13 for accommodating the battery cell 20; the energy absorbing member 112 is installed on the first plate member 111 and is located between the battery cell 20 and the first plate member 111, the energy absorbing member 112 is provided with an energy absorbing cavity 1120, and the energy absorbing member 112 is configured to absorb at least part of the pressure transmitted from the first plate member 111 to the battery cell 20.

[0081] The battery device 100 may be a secondary battery or a primary battery, and may also be a lithium sulfur battery, a sodium ion battery or a magnesium ion battery, but is not limited thereto. The battery cell 20 and the battery device 100 may be cylindrical, flat, rectangular or in other shapes.

[0082] The box 10 is used to provide a storage space for the battery cell 20, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first part 1 and a second part 2, and the first part 1 and the second part 2 cover each other, and the first part 1 and the second part 2 jointly define a storage space for accommodating the battery cell 20. Among them, the first part 1 and the second part 2 can both be hollow structures with one end open, and the second part 2 covers the open side of the first part 1, so that the first part 1 and the second part 2 jointly define a storage space; or the second part 2 can be a plate-like structure, the first part 1 is a hollow structure with one side open, and the open side of the second part 2 covers the open side of the first part 1. Of course, the box 10 formed by the first part 1 and the second part 2 can be a variety of shapes, such as a cylinder, a cuboid, etc.

[0083] The first part 1 includes the above-mentioned bottom plate assembly 11 and a plurality of side walls 12 connected to the bottom plate assembly 11. Of course, the second part 2 may also have a structure similar to or the same as the first part 1. This embodiment only takes the side walls 12 and the bottom plate assembly 11 of the first part 1 as an example for explanation.

[0084] The bottom plate assembly 11 of the first part 1 and the multiple side walls 12 together form a trough structure. It can be understood that the bottom plate assembly 11 refers to the wall of the battery device 100 located at the bottom of the box body 10 in the figure. During the production, transportation and application of the battery device 100, the bottom plate assembly 11 of this embodiment may be located above the side wall 12.

[0085] The bottom plate assembly 11 includes a first plate 111, which can be understood as the bottom guard plate of the box body 10. The first plate 111 can be connected to the side wall 12 by fixed connection methods such as welding, bolt connection, riveting, etc., so that the first plate 111 and the side wall 12 form a accommodating cavity 13 with an open upper end.

[0086] The energy absorbing member 112 is directly installed on the surface of the bottom plate assembly 11 facing the battery cell 20. The energy absorbing member 112 can be used as a structure that directly supports the battery cell 20. In this case, the energy absorbing member 112 can be directly connected to the side wall 12, or the energy absorbing member 112 can be directly installed between the second plate 113 and the first plate 111 as described below. In this case, the second plate 113 is used as a structure that supports the battery cell 20. The energy absorbing member 112 is only used to absorb the pressure output from the first plate 111 to the second plate 113, and at the same time can play a role in enhancing the structural strength of the entire bottom plate assembly 11.

[0087] The “energy absorption” in the energy absorbing member 112 and the energy absorbing cavity 1120 refers to the ability of the member or the space to absorb the pressure energy transmitted from external structures such as the first plate 111 , the battery cell 20 and the second plate 113 described below through its own deformation.

[0088] At least part of the material of the energy absorbing member 112 may be the same as or different from that of the first plate 111 . For example, both the material of the energy absorbing member 112 and the material of the first plate 111 are metal, and the metal may be aluminum alloy, stainless steel, titanium alloy, etc.

[0089] When the first plate 111 is vibrated or deformed in the direction of the battery cell 20, the energy absorbing member 112 utilizes its own energy absorbing cavity 1120 to deform to absorb the pressure transmitted from the first plate 111 to the battery cell 20, thereby reducing the impact of the pressure on the battery cell 20 and improving the stability of the battery cell 20 installed in the box body 10.

[0090] Combined with Figure 5-8 As shown, in some examples, optionally, the bottom plate assembly 11 also includes a second plate 113 , which is connected to the side wall 12 and is located between the battery cell 20 and the energy absorbing member 112 , and the surface of the energy absorbing member 112 facing away from the first plate 111 abuts against the second plate 113 .

[0091] The second plate 113 is used to support the battery cell 20. The second plate 113 can be connected to the side wall 12 by welding, riveting, bolting, etc. The second plate 113 and the first plate 111 can be made of rigid materials such as metal, such as aluminum alloy, titanium alloy and stainless steel.

[0092] A rigid material refers to a material whose deformation is very small and almost negligible when subjected to external force. The elastic modulus of a rigid material is very high, so that the strain of the material remains small under relatively large stress.

[0093] When the first plate 111 vibrates and deforms, the energy absorbing member 112 can absorb the vibration and deformation transmitted from the first plate 111 to the second plate 113 , thereby reducing the vibration and deformation transmitted from the second plate 113 to the battery cell 20 .

[0094] In some examples, optionally, a plurality of flow channels 1131 are provided in the second plate 113 , and the flow channels 1131 are filled with a coolant.

[0095] The second plate 113 is used to carry the battery cell 20 and serves as a heat management component. The second plate 113 can effectively dissipate the heat generated by the battery cell 20 and is usually made of a material with good thermal conductivity (such as aluminum or copper).

[0096] There are multiple flow channels 1131 in the second plate 113, and the multiple flow channels 1131 can be arranged along the second direction Y or a third direction Z perpendicular to the second direction Y, and two adjacent flow channels 1131 can be connected to each other. The flow channels 1131 can be filled with coolants such as water, ethylene glycol solution, and fluorinated liquid. The existence of the flow channels 1131 and the coolant makes the second plate 113 a water-cooled plate structure.

[0097] The water cooling plate structure can cool the battery cells 20 , reduce the possibility that the performance of the battery cells 20 will be affected by excessive temperature, effectively optimize the performance and life of the battery cells 20 , and improve the overall reliability of the battery device 100 .

[0098] In some examples, optionally, the energy absorbing member 112 is integrally connected to the first plate member 111 and / or the second plate member 113 .

[0099] The above technical solution includes three implementation methods. One is that the energy absorbing member 112 is integrally connected to the first plate 111, and is connected to the second plate 113 in other ways. The second is that the energy absorbing member 112 is integrally connected to the second plate 113, and is connected to the first plate 111 in other ways. The third is that the first energy absorbing member 112 is integrally connected to the first plate 111 and the second plate 113 respectively.

[0100] Integrally connecting the energy absorbing member 112 with the first plate member 111 can improve the connection stability between the two, enable the energy absorbing member 112 to better absorb the vibration and deformation of the first plate member 111, and enhance the structural strength of the entire bottom plate assembly 11; similarly, integrally connecting the energy absorbing member 112 with the second plate member 113 can improve the connection stability between the two, and further enhance the structural strength of the entire bottom plate assembly 11.

[0101] The integrated connection methods include welding, bolt connection, riveting, bonding, brazing and laser welding. In some embodiments, the energy absorbing member 112 is respectively connected to the first plate 111 and the second plate 113 by brazing.

[0102] When the energy absorbing member 112, the first plate 111 and the second plate 113 of the present embodiment are made of metal, the benefit of brazing to metal is that it can connect metal parts at a lower temperature, avoiding excessive thermal impact of the substrate, which helps to reduce thermal deformation and stress. In addition, due to its low thermal impact, brazing is more friendly to sensitive parts and helps to maintain the overall structure and performance of the parts.

[0103] Combined with the attachment again Figure 3 As shown, in some examples, optionally, a surface of the first plate 111 facing the second plate 113 is provided with a receiving groove 1111 , and the second plate 113 and the energy absorbing member 112 are located in the receiving groove 1111 .

[0104] The first plate 111 can be formed into a receiving groove 1111 by injection molding or stamping processes. The size of the first plate 111 is larger than the size of the second plate 113 and the energy absorbing member 112, and the size of the receiving groove 1111 can be equal to or slightly larger than the size of the second plate 113. At the same time, the height of the receiving groove 1111 is sufficient to accommodate the energy absorbing member 112 and at least part of the second plate 113.

[0105] When the box body 10 is assembled, the second plate 113 and the energy absorbing member 112 may be installed in the receiving groove 1111 first, and then the bottom plate assembly 11 formed by the first plate 111, the second plate 113 and the energy absorbing member 112 may be directly connected to the side wall 12. Alternatively, the second plate 113 may be connected to the side wall 12 first, and then the whole formed by the energy absorbing member 112 and the first plate 111 may be connected to the side wall 12.

[0106] Both of the above methods accommodate the energy absorbing member 112 and the second plate member 113 through the accommodating groove 1111, which not only facilitates the installation of the energy absorbing member 112 and the second plate member 113 without occupying the space of the accommodating cavity 13, but also enables the first plate member 111, the energy absorbing member 112 and the second plate member 113 to form an integral bottom plate assembly 11 structure through the accommodating groove 1111 after installation, and has better structural stability and strength.

[0107] Combined with the attachment again Figure 3 As shown, in some examples, the second plate 113 abuts against the support beam 14 .

[0108] The length direction of the support beam 14 can extend along a third direction Z in the figure, and the third direction Z intersects with the first direction X and the second direction Y mentioned above, respectively. The first direction X is the discharge direction from the energy absorbing member 112 to the first plate member 111. In some embodiments, the second direction Y is perpendicular to the first direction X and can be the length direction of the base plate assembly 11. The third direction Z can be perpendicular to the first direction X and the second direction Y, respectively, and can be the width direction of the base plate assembly 11.

[0109] The first side wall 121 and the second side wall 122 are arranged relatively to each other along the third direction Z in the figure, and the support beam 14 is respectively connected to the first side wall 121 and the second side wall 122. The connection method can be an integrated connection method such as welding, or the support beam 14 and the entire side wall 12 structure can be integrally formed during processing.

[0110] The first side wall 121 and the second side wall 122 are supported and connected by the support beam 14, so that the structural strength and stability of the side wall 12 can be improved. At the same time, the second plate 113 is abutted against the support beam 14, and the support beam 14 is used to support the second plate 113, thereby improving the structural stability of the second plate 113.

[0111] In some examples, optionally, along the first direction, the support beam 14 and the energy absorbing member 112 are staggered, and the first direction X is the arrangement direction from the energy absorbing member 112 to the first plate member 111 .

[0112] The staggered arrangement means that the projections of the support beam 14 and the energy absorbing member 112 along the first direction X have no overlapping parts.

[0113] For example, in the present embodiment, there are two energy absorbing members 112. Along the arrangement direction intersecting the first side wall 121 and the second side wall 122, the two energy absorbing members 112 are arranged at intervals on the first plate 111. The projection of the support beam 14 along the first direction X is located in the interval between the two energy absorbing members 112. The first direction X is the arrangement direction from the energy absorbing members 112 to the first plate 111.

[0114] The projection of the support beam 14 along the first direction X is located in the interval between the two energy absorbing members 112. It can be understood that along the first direction X in the figure, the two energy absorbing members 112 and the support beam 14 are staggered. This structural design takes into account that the second plate 113 has been supported and fixed by the support beam 14 at the position of the support beam 14, and there is no need to support and fix it by the energy absorbing member 112. Therefore, the use of the support beam 14 can not only improve the structural strength of the side wall 12, but also reduce the volume and consumables of the energy absorbing member 112, thereby reducing production costs.

[0115] In addition, there are two energy absorbing members 112 with a gap between them, so that the two energy absorbing members 112 can absorb energy separately. The gap between the two energy absorbing members 112 allows the two energy absorbing members 112 to deform to a certain extent along the second direction Y, which is more conducive to energy absorption.

[0116] Of course, the number of the energy absorbing members 112 is not limited thereto. For example, the number of the energy absorbing members 112 may be one or more than two.

[0117] Combined with Figure 6 , Attachment Figure 7 And attached Figure 8 As shown, in some examples, optionally, the energy absorbing member 112 includes a first wall 1121, a second wall 1122 and an energy absorbing structure 1123, the first wall 1121 and the second wall 1122 are arranged at intervals along a first direction X, the energy absorbing structure 1123 is provided with an energy absorbing cavity 1120, the first direction X is the arrangement direction of the energy absorbing member 112 to the first plate 111, the first wall 1121 is connected to the first plate 111, and the energy absorbing structure 1123 is connected between the first wall 1121 and the second wall 1122.

[0118] The first wall 1121 and the second wall 1122 may be plate-like structures. The materials of the first wall 1121, the second wall 1122 and the energy absorbing structure 1123 may all be metals such as aluminum alloys. The energy absorbing structure 1123 is provided with an energy absorbing cavity 1120, and the number of the energy absorbing cavities 1120 is multiple. The first wall 1121, the second wall 1122 and the energy absorbing structure 1123 may be integrally formed or formed into an integral structure by welding.

[0119] The first wall 1121 is connected to the first plate 111 , and the second wall 1122 is connected to the second plate 113 . The connection method may be brazing, so that the energy absorbing member 112 , the first plate 111 and the second plate 113 form an integral structure.

[0120] When the energy absorbing member 112 absorbs vibration and deformation, the first wall 1121 is used to connect the first plate 111, and the second wall 1122 is used to support the battery cell 20 or the second plate 113. The energy absorbing structure 1123 utilizes its own energy absorbing cavity 1120 between the first wall 1121 and the second wall 1122 to absorb energy by deformation, and has a simple structure and good energy absorption effect.

[0121] Combined with Fig. 9 As shown, in some examples, optionally, the energy absorption structure 1123 includes a plurality of first energy absorption parts 11231, and the plurality of first energy absorption parts 11231 are arranged at intervals along the second direction Y, and at least one energy absorption cavity 1120 is enclosed between two adjacent first energy absorption parts 11231, and the second direction Y intersects with the first direction X.

[0122] The first energy absorbing parts 11231 may be arranged at intervals or closely adjacent to each other along the second direction Y. When the first energy absorbing parts 11231 are arranged at intervals, the first energy absorbing parts 11231 themselves may or may not be provided with energy absorbing cavities 1120, and one or more energy absorbing cavities 1120 are provided between two adjacent first energy absorbing parts 11231 along the second direction Y. When the first energy absorbing parts 11231 are arranged closely adjacent to each other along the second direction Y, the first energy absorbing parts 11231 themselves have energy absorbing cavities 1120.

[0123] The multiple first energy absorbing parts 11231 can generate deformation and absorb energy when the first wall 1121 receives pressure from the first plate 111 . The multiple first energy absorbing parts 11231 absorb energy at the same time, resulting in a better energy absorption effect.

[0124] Moreover, when the material of the first energy absorbing portion 11231 of the present embodiment is a metal material, the multiple first energy absorbing portions 11231 can also better support the first wall 1121 and the second wall 1122 , thereby improving the structural stability of the entire bottom plate assembly 11 .

[0125] Along the third direction Z perpendicular to the second direction Y, the size of the first energy absorption part 11231 of the present embodiment can be smaller than or equal to the size of the first wall 1121, and / or smaller than the size of the first energy absorption part 11231 and smaller than or equal to the size of the second wall 1122, so that two adjacent first energy absorption parts 11231 can form an energy absorption cavity 1120 with the first wall 1121 and the second wall 1122 that is open at both ends along the third direction Z.

[0126] The plurality of first energy absorbing portions 11231 may be evenly spaced along the second direction Y so that the plurality of energy absorbing cavities 1120 have the same size, thereby achieving the same energy absorbing effect at all locations of the energy absorbing member 112 .

[0127] An energy absorbing cavity 1120 is provided between two adjacent first energy absorbing parts 11231 . When deforming due to energy absorption, the first energy absorbing parts 11231 can partially enter the energy absorbing cavity 1120 , so that the energy absorbing cavity 1120 is deformed, thereby improving the energy absorption effect.

[0128] Combined with Fig.10 As shown, in some examples, optionally, the energy absorption structure 1123 also includes a plurality of second energy absorption parts 11232, the plurality of second energy absorption parts 11232 are arranged at intervals along the second direction Y, and each is alternately arranged with the plurality of first energy absorption parts 11231 along the second direction Y, the second energy absorption parts 11232 are respectively connected to two adjacent first energy absorption parts 11231, and are located in the energy absorption cavity 1120 between the two adjacent first energy absorption parts 11231.

[0129] The second energy absorbing part 11232 and the first energy absorbing part 11231 can be integrally formed or integrally connected. The material of the second energy absorbing part 11232 is the same as that of the first energy absorbing part 11231. For example, both can be metal materials such as aluminum alloy. The second energy absorbing part 11232 can separate the energy absorbing cavity 1120 between two adjacent first energy absorbing parts 11231 into two sub-cavities, thereby increasing the number of energy absorbing cavities 1120 and improving the energy absorption effect.

[0130] Furthermore, the second energy absorbing portion 11232 is designed to connect two adjacent first energy absorbing portions 11231 , so as to improve the structural strength and stability of the first energy absorbing portion 11231 and reduce the possibility of deformation of the first energy absorbing portion 11231 during relatively small vibrations.

[0131] Combined with Fig.11 As shown, in some examples, optionally, each first energy absorbing portion 11231 itself is provided with at least one energy absorbing cavity 1120 .

[0132] The first energy absorbing part 11231 itself is provided with an energy absorbing cavity 1120 . When the energy absorbing member 112 absorbs energy, the first energy absorbing part 11231 can change the shape of the energy absorbing cavity 1120 by deforming itself to absorb energy.

[0133] Each first energy absorbing part 11231 is provided with an energy absorbing cavity 1120. The interior of the first energy absorbing part 11231 can be set as a hollow structure, and the hollow structure is the energy absorbing cavity 1120. Along the cross sections parallel to the first direction X and the second direction Y in the figure, the cross-sectional shape of the first energy absorbing part 11231 of the present embodiment can be circular, elliptical, rectangular, triangular, irregular, etc., as long as the energy absorbing cavity 1120 is provided therein.

[0134] At the same time, while the energy absorption cavity 1120 is provided in the first energy absorption part 11231, an energy absorption cavity 1120 may also be provided along the two adjacent first energy absorption parts 11231 mentioned above. For example, two first energy absorption parts 11231 with circular cross-sections are only partially connected, and there is a gap between the remaining parts. The gap can form an energy absorption cavity 1120 with the first wall 1121 or the second wall 1122.

[0135] In addition, the first energy absorbing parts 11231 may be arranged in multiple rows along the first direction X, and each row has multiple first energy absorbing parts 11231 arranged along the second direction Y.

[0136] In some examples, optionally, in a cross section along a second direction Y parallel to the first direction X and intersecting the first direction X, a cross section of the energy absorbing structure 1123 is in a grid, wave, or sawtooth shape.

[0137] Combined with Fig.12As shown, the grid shape may be a fishing net shape, which has an energy absorption cavity 1120 with a diamond-shaped cross-section. The grid-shaped energy absorption structure 1123 has a plurality of inclined and crossed supports, has better structural strength, and the energy absorption cavity 1120 is more densely arranged, thereby providing a good energy absorption effect.

[0138] Combined with Fig.13 As shown, the whole of the wavy energy absorbing structure 1123 is similar to a corrugated tile structure, and also has good energy absorbing effect and structural strength. Similarly, the serrated energy absorbing structure 1123 (not shown in the figure) with a similar shape is also the same.

[0139] Combined with Fig.14 As shown, in some examples, optionally, the energy absorbing cavity 1120 is provided with an energy absorbing material 1124 .

[0140] The energy absorbing material 1124 may be a flexible material, such as polyurethane foam, EPP (expanded polypropylene), silicone material, ultra-high molecular weight polyethylene (UHMWPE), hydrogel and the like.

[0141] The energy absorbing material 1124 is filled in the energy absorbing cavity 1120 . When the energy absorbing member 112 absorbs energy and deforms, the energy absorbing material 1124 can absorb the pressure of the energy absorbing member 112 , thereby further improving the energy absorbing effect and reducing the possibility of collapse and deformation of the energy absorbing cavity 1120 .

[0142] Combined with the attachment again Figure 9-14 As shown, in some examples, optionally, the energy absorbing member 112 further includes a third wall 1125 and a fourth wall 1126, the third wall 1125 is located on one side of the first wall 1121 and the second wall 1122 along a second direction Y intersecting the first direction X, and is connected to the first wall 1121 and the second wall 1122, respectively, and the fourth wall 1126 is located on the other side of the first wall 1121 and the second wall 1122 along the second direction Y, and is connected to the first wall 1121 and the second wall 1122, respectively.

[0143] The material of the third wall 1125 and the fourth wall 1126 may be the same as that of the first wall 1121 and the second wall 1122 , and the third wall 1125 and the fourth wall 1126 may be in a plate shape.

[0144] The third wall 1125 and the fourth wall 1126 are respectively located on both sides of the entire energy absorbing member 112 along the second direction Y. The third wall 1125 can be respectively connected to or integrally formed with the first wall 1121 and the second wall 1122, and the fourth wall 1126 can respectively be connected to or integrally formed with the first wall 1121 and the second wall 1122.

[0145] The first wall 1121 , the second wall 1122 , the third wall 1125 and the fourth wall 1126 form an energy absorption box with open ends along the third direction Z. The third wall 1125 and the fourth wall 1126 can assist in energy absorption and provide a better energy absorption effect.

[0146] In some examples, optionally, at least one energy absorbing cavity 1120 is provided between the third wall 1125 and the energy absorbing structure 1123 , and / or at least one energy absorbing cavity 1120 is provided between the fourth wall 1126 and the energy absorbing structure 1123 .

[0147] For example Fig. 9 As shown in the figure, along the second direction Y, there is an energy absorption cavity 1120 between the third wall 1125 and the adjacent first energy absorption part 11231, and there is an energy absorption cavity 1120 between the fourth wall 1126 and the adjacent first energy absorption part 11231, thereby increasing the number of energy absorption cavities 1120 and providing a better energy absorption effect.

[0148] Finally, please participate in the attached Figure 1-14As shown, an embodiment of the present application provides a battery device 100, including a box body 10 and a battery cell 20 installed in the box body 10, the box body 10 includes a bottom plate assembly 11, a side wall 12 and a support beam 14, the side wall 12 includes a first side wall 121 and a second side wall 122 arranged opposite to each other, the support beam 14 is respectively connected to the first side wall 121 and the second side wall 122, the bottom plate assembly 11 includes a first plate member 111 and an energy absorbing member 112, the first plate member 111 is connected to the side wall 12, and together with the side wall 12, forms a accommodating cavity 13 for accommodating the battery cell 20; the energy absorbing member 112 is installed on the first plate member 111 and is located between the battery cell 20 and the first plate member 111, the energy absorbing member 112 is provided with an energy absorbing cavity 1120, and the energy absorbing member 112 is configured to absorb at least part of the pressure transmitted from the first plate member 111 to the battery cell 20. The bottom plate assembly 11 also includes a second plate 113, which is connected to the side wall 12 and is located between the battery cell 20 and the energy absorbing member 112. The surface of the energy absorbing member 112 facing away from the first plate 111 abuts against the second plate 113. A plurality of flow channels 1131 are provided in the second plate 113, and the flow channels 1131 are filled with coolant. The energy absorbing member 112 is integrally connected to the first plate 111 and / or the second plate 113. A receiving groove 1111 is provided on the surface of the first plate 111 facing the second plate 113, and the second plate 113 and the energy absorbing member 112 are located in the receiving groove 1111. The second plate 113 abuts against the support beam 14. Along the first direction, the support beam 14 and the energy absorbing member 112 are staggered, and the first direction X is the arrangement direction of the energy absorbing member 112 to the first plate 111. The energy absorbing member 112 includes a first wall 1121, a second wall 1122 and an energy absorbing structure 1123. The first wall 1121 and the second wall 1122 are arranged at intervals along a first direction X. The energy absorbing structure 1123 is provided with an energy absorbing cavity 1120. The first direction X is the arrangement direction of the energy absorbing member 112 to the first plate 111. The first wall 1121 abuts against the first plate 111. The energy absorbing structure 1123 is connected between the first wall 1121 and the second wall 1122. The energy absorbing structure 1123 includes a plurality of first energy absorbing parts 11231. The plurality of first energy absorbing parts 11231 are arranged at intervals along a second direction Y. At least one energy absorbing cavity 1120 is enclosed between two adjacent first energy absorbing parts 11231. The second direction Y intersects with the first direction X. The energy absorbing structure 1123 also includes a plurality of second energy absorbing parts 11232, which are arranged at intervals along the second direction Y, and each of which is arranged alternately with the plurality of first energy absorbing parts 11231 along the second direction Y. The second energy absorbing parts 11232 are respectively connected to two adjacent first energy absorbing parts 11231, and are located in the energy absorbing cavity 1120 between the two adjacent first energy absorbing parts 11231. Each first energy absorbing part 11231 itself is provided with at least one energy absorbing cavity 1120. On the cross section parallel to the first direction X and the second direction Y, the cross section of the energy absorbing structure 1123 is grid-shaped, wavy-shaped or sawtooth-shaped, and the second direction Y intersects with the first direction X.The energy absorbing cavity 1120 is provided with an energy absorbing material 1124. The energy absorbing member 112 further includes a third wall 1125 and a fourth wall 1126. The third wall 1125 is located on one side of the first wall 1121 and the second wall 1122 along the second direction Y intersecting the first direction X, and is connected to the first wall 1121 and the second wall 1122 respectively. The fourth wall 1126 is located on the other side of the first wall 1121 and the second wall 1122 along the second direction Y, and is connected to the first wall 1121 and the second wall 1122 respectively. At least one energy absorbing cavity 1120 is provided between the third wall 1125 and the energy absorbing structure 1123, and / or at least one energy absorbing cavity 1120 is provided between the fourth wall 1126 and the energy absorbing structure 1123.

[0149] Based on the above-mentioned battery device 100 , the embodiment of the present application further provides an electric device, including the above-mentioned battery device 100 , the battery device 100 is used to provide electric energy to the electric device, and the electric device may be a vehicle 1000 .

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for the intermediate technical features, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery device, characterized in that: The invention comprises a box body and a battery cell installed in the box body, wherein the box body comprises a bottom plate assembly, a side wall and a support beam, wherein the side wall comprises a first side wall and a second side wall arranged opposite to each other, and the support beam is connected to the first side wall and the second side wall respectively, wherein the bottom plate assembly comprises: A first plate, connected to the side wall, and together with the side wall, forms a receiving cavity for receiving the battery cell; The energy absorbing member is installed on the first plate and located between the battery cell and the first plate. The energy absorbing member is provided with an energy absorbing cavity and is configured to deform to absorb at least part of the pressure transmitted from the first plate to the battery cell.

2. The battery device according to claim 1, characterized in that: The bottom plate assembly further includes a second plate member connected to the side wall and located between the battery cell and the energy absorbing member. The surface of the energy absorbing member facing away from the first plate member is connected to the second plate member.

3. The battery device according to claim 2, characterized in that: A plurality of flow channels are arranged in the second plate, and the flow channels are used for the flow of the temperature regulating medium.

4. The battery device according to claim 2, characterized in that: The energy absorbing member is integrally connected to the first plate member and / or the second plate member.

5. The battery device according to claim 2, characterized in that: A receiving groove is provided on a surface of the first plate member facing the second plate member, and the second plate member and the energy absorbing member are located in the receiving groove.

6. The battery device according to claim 2, characterized in that: The second plate member abuts against the support beam.

7. The battery device according to claim 6, characterized in that: The support beam and the energy absorbing member are staggered along a first direction, and the first direction is an arrangement direction from the energy absorbing member to the first plate member.

8. The battery device according to any one of claims 1 to 7, characterized in that: The energy absorbing member includes a first wall, a second wall and an energy absorbing structure. The first wall and the second wall are arranged at intervals along a first direction. The energy absorbing structure is provided with the energy absorbing cavity. The first direction is the arrangement direction of the energy absorbing member to the first plate. The first wall is against the first plate. The energy absorbing structure is connected between the first wall and the second wall.

9. The battery device according to claim 8, characterized in that: The energy absorbing structure includes a plurality of first energy absorbing parts, which are arranged at intervals along a second direction, and at least one energy absorbing cavity is enclosed between two adjacent first energy absorbing parts. The second direction intersects with the first direction.

10. The battery device according to claim 9, characterized in that: The energy absorbing structure also includes a plurality of second energy absorbing parts, which are arranged at intervals along the second direction and are alternately arranged with the plurality of first energy absorbing parts along the second direction, and each of the second energy absorbing parts is respectively connected to two adjacent first energy absorbing parts and is located in the energy absorbing cavity between two adjacent first energy absorbing parts.

11. The battery device according to claim 9, characterized in that: Each of the first energy absorbing parts is provided with at least one energy absorbing cavity.

12. The battery device according to claim 8, characterized in that: In a cross section parallel to the first direction and the second direction, the cross section of the energy absorbing structure is in a grid, wave or sawtooth shape, and the second direction intersects with the first direction.

13. The battery device according to claim 8, characterized in that The energy absorbing cavity is provided with energy absorbing material.

14. The battery device according to claim 8, characterized in that The energy absorbing member further includes a third wall and a fourth wall, wherein the third wall is located on one side of the first wall and the second wall along a second direction intersecting the first direction and is connected to the first wall and the second wall respectively, and the fourth wall is located on the other side of the first wall and the second wall along the second direction and is connected to the first wall and the second wall respectively.

15. The battery device according to claim 14, characterized in that: At least one energy absorbing cavity is provided between the third wall and the energy absorbing structure, and / or at least one energy absorbing cavity is provided between the fourth wall and the energy absorbing structure.

16. An electrical equipment, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 15, wherein the battery device is used to provide electrical energy.

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