Battery devices, energy storage devices and power consumption devices

Abstract

The present application discloses a battery device, an energy storage device and an electric device. The battery device includes a plurality of mutually connected frames, which enclose a storage space to accommodate a battery cell. The plurality of frames include a pair of first frames extending in a first direction, each first frame includes a first wall and a second wall arranged opposite to each other in a second direction, a buffer cavity is provided inside the first frame, at least one energy absorption unit is arranged inside the buffer cavity, the energy absorption unit includes a buffer plate and a buffer tube connected to the buffer plate, the buffer plate is arranged perpendicular to the second direction and the axial direction of the buffer tube is perpendicular to the second direction, and the first wall and the second wall are in contact with the energy absorption unit respectively. Through the present application, the energy absorption unit arranged inside the frame can be used to disperse the impact load and absorb part of the impact energy while improving the frame rigidity of the battery device, thereby improving the structural stability and buffering capacity of the battery device.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to battery devices, energy storage devices and power-consuming devices. Background Art

[0002] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in areas such as energy storage.

[0003] In new energy vehicles equipped with batteries, the batteries can be used to provide power in whole or in part. In the field of energy storage, the batteries can be installed in the energy storage box or directly on the user side. In these application scenarios, there are undesirable situations where the battery cells are deformed and damaged due to external vibration impact. Therefore, how to improve the buffering capacity of the battery device is one of the research and development topics in the industry. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a battery device, an energy storage device and an electricity-using device.

[0005] This application is implemented through the following technical solutions.

[0006] A first aspect of an embodiment of the present application discloses a battery device, which includes a plurality of interconnected frames, which enclose a storage space to accommodate battery cells; the plurality of frames include a pair of first frames extending along a first direction, each of the first frames includes a first wall and a second wall arranged opposite to each other along a second direction, the first frame has a buffer cavity inside, at least one energy absorption unit is arranged inside the buffer cavity, the energy absorption unit includes a buffer plate and a buffer tube connected to the buffer plate, the buffer plate is arranged perpendicular to the second direction and the axial direction of the buffer tube is perpendicular to the second direction, and the first wall and the second wall are respectively in contact with the energy absorption unit.

[0007] Since the first frame has a buffer cavity inside and an energy-absorbing unit is arranged inside the buffer cavity, the cavity inside the frame can be effectively utilized, reducing the occupation of the storage space by the energy-absorbing unit; at the same time, the rigidity of the frame can be improved, the deformation of the frame can be suppressed to a certain extent, and the degree of squeezing of the battery cells in the storage space can be reduced, so as to reduce the risk of adverse conditions of the battery cells due to squeezing.

[0008] On the other hand, the impact load acting on the frame along the second direction can be transmitted to the energy absorbing unit, and the impact load is dispersed by the buffer plate and the buffer tube relatively arranged along the second direction. The buffer tube can also absorb part of the impact energy, thereby improving the structural stability and buffering capacity of the battery device.

[0009] In some embodiments, the buffer tubes are arranged into a buffer tube group along a direction perpendicular to the axial direction, outer surfaces of adjacent buffer tubes in the buffer tube group are in contact with each other, the energy absorption unit includes at least one group of buffer tube groups, and the axial direction and the arrangement direction of the buffer tubes are perpendicular to the second direction in pairs.

[0010] Since the buffer tubes are arranged into a buffer tube group along a direction perpendicular to the axial direction of the buffer tubes, a larger buffer area can be formed on the collision plane perpendicular to the second direction, covering more battery cells. In addition, adjacent buffer tubes are in contact with each other, which is conducive to transferring and dispersing the impact load acting on the frame along the second direction to more buffer tubes, further improving the buffering capacity of the energy absorbing unit.

[0011] In some embodiments, the first frame includes a third wall and a fourth wall perpendicular to a third direction, the first direction, the second direction and the third direction are perpendicular to each other; the axial direction is the first direction, the buffer tubes are arranged into the buffer tube group along the third direction, and the buffer tube group is respectively connected to the third wall and the fourth wall along the third direction.

[0012] Thus, the flexibility of buffer tube arrangement can be improved, and the size and quantity of buffer tubes can be flexibly selected according to the size of the first frame along the third direction, so as to facilitate adaption to battery devices of different sizes. In addition, the connection of the buffer tube group with the third wall and the fourth wall is also conducive to improving the rigidity of the first frame, and when impacted, the impact load can also be transferred to the third wall and the fourth wall, reducing the damage of the impact load to the battery monomer, and further improving the overall structural stability and buffering capacity of the battery device.

[0013] In some embodiments, the first frame includes a third wall and a fourth wall perpendicular to the third direction, the first direction, the second direction and the third direction are perpendicular to each other; the axial direction is the third direction, the buffer tubes are arranged into the buffer tube group along the first direction, and the buffer tubes are respectively connected to the third wall and the fourth wall along the third direction.

[0014] Thus, the flexibility of buffer tube arrangement can be improved, and the size and quantity of buffer tubes can be flexibly selected according to the size of the first frame along the first direction, so as to facilitate adaption to battery devices of different sizes. In addition, the connection of the buffer tube group with the third wall and the fourth wall is also conducive to improving the rigidity of the first frame, and when impacted, the impact load can also be transferred to the third wall and the fourth wall, reducing the damage of the impact load to the battery monomer, and further improving the overall structural stability and buffering capacity of the battery device.

[0015] In some embodiments, the buffer tube is a circular tube.

[0016] Since the buffer tube is a circular tube, the buffer tube has the characteristics of simple structure and easy manufacturing. In addition, the contact between the circular tube and the outside is surface-to-surface contact. Due to the effect of inertia, after the circular tube is impacted, the impact surface is deformed, and the deformation gradually moves along the circumference of the buffer tube, so that more material on the cross section of the buffer tube participates in the absorption of energy and is transmitted to other buffer parts through the contact surface, which is beneficial to improving the buffering effect of the energy absorption unit. At the same time, the mass of the circular tube is small, which can reduce the weight of the battery device to a certain extent.

[0017] In some embodiments, in the buffer tube group, the wall thickness of each buffer tube is the same, and / or the inner diameter of each buffer tube is the same.

[0018] As a result, the buffering effect at different positions in the buffer tube group is more uniform, and batch processing and assembly of the buffer tubes are also convenient. The same size is also conducive to designing the arrangement and quantity of the buffer plates and buffer tubes according to the size.

[0019] In some embodiments, the buffer tube assembly comprises an integrally formed member made of steel.

[0020] Therefore, the steel material can improve the rigidity of the buffer tube group and the frame, the one-piece molding structure can reduce the amount of fixed connectors, save the cost of welding and fixing the buffer tube, and is also beneficial to improving the processing efficiency of the buffer tube group.

[0021] In some embodiments, a plurality of the buffer tube groups are arranged along the second direction, and at least one buffer plate is disposed between adjacent buffer tube groups.

[0022] Therefore, under the action of impact load, each buffer tube group cooperates with the buffer plate to deform and absorb energy more easily, thereby improving the energy absorption effect of the energy absorption unit.

[0023] In some embodiments, the energy absorption unit includes at least one sub-energy absorption unit, each of which includes a first buffer plate and a second buffer plate arranged opposite to each other along the second direction; along the second direction, a group of the buffer tube groups is arranged between the first buffer plate and the second buffer plate.

[0024] Thus, the number of sub-energy absorbing units can be flexibly configured according to the length of the buffer cavity along the second direction, making it easier to adapt to buffer cavities of different sizes, taking into account both the rigidity and buffering effect of the frame. At the same time, the buffer tube group is arranged between the first buffer plate and the second buffer plate, which is conducive to the deformation of the buffer tube to absorb energy, and the buffer tube can also transmit the impact force to the buffer plate through the contact part with the two buffer plates.

[0025] In some embodiments, adjacent sub-energy absorbing units are fixedly connected along the second direction.

[0026] Since the adjacent sub-energy absorption units are fixedly connected, the rigidity and natural frequency of the frame can be improved, the risk of resonance of the sub-energy absorption units can be reduced, and the risk of abnormal noise from the battery device in the application scenario can be reduced, thereby improving the reliability of the battery device. In addition, the fixed connection can effectively transmit the impact load and improve the energy absorption effect.

[0027] In some embodiments, the thickness of the first buffer plate is equal to the wall thickness of the buffer tube, and / or the thickness of the second buffer plate is equal to the wall thickness of the buffer tube.

[0028] Therefore, it is convenient to use the same raw material plate to manufacture the buffer plate and the buffer tube, thereby improving the processing efficiency of the energy absorbing unit.

[0029] In some embodiments, a ratio of the buffer tube wall thickness to the first wall thickness is in a range of 0.5 to 0.7, and / or a ratio of the buffer tube wall thickness to the second wall thickness is in a range of 0.5 to 0.7.

[0030] Therefore, the wall thickness of the buffer tube is within an appropriate range, which can take into account both the weight of the battery device and the specific energy absorption effect of the sub-energy absorption unit.

[0031] In some embodiments, along the second direction, the length of the sub-energy absorption unit along the second direction is 6 mm to 8 mm, and / or the distance between the first wall and the second wall is 18 mm to 24 mm.

[0032] Therefore, the above values ​​are within a suitable range, and a suitable number of sub-energy absorption units can be reasonably designed and arranged according to the size of the buffer cavity of battery devices of different sizes, so as to make full use of the internal space of the frame.

[0033] In some embodiments, the buffer tube group includes two bent plates connected to each other, and along the arrangement direction of the buffer tubes, the bent plates include first bent sections and second bent sections that are alternately connected, the first bent sections have a first protrusion that protrudes toward one side along the second direction, and the second bent sections have a second protrusion that protrudes toward the other side along the second direction, wherein the first protrusion of one bent plate is opposite to the second protrusion of the other bent plate, and the first protrusion and the second protrusion protrude in directions away from each other along the second direction.

[0034] Therefore, the buffer tube group can be made by connecting two bent plates, and the relatively arranged first protrusion and second protrusion can surround the tube cavity of the buffer tube, which reduces the processing difficulty of the buffer tube group, improves the processing efficiency, and also improves the stiffness of the buffer tube group and the energy absorption unit.

[0035] In some embodiments, a plug-in slot opening toward one side of the third direction is formed between the first bending section and the second bending section, and the plug-in slots of the two bending plates are plugged in such a way that the openings are opposite to each other along the axial direction.

[0036] Therefore, the plug-in groove is conducive to the assembly of the bent plate, and the two bent plates can be plug-connected, which reduces the assembly difficulty of the buffer tube group and improves the assembly efficiency of the buffer tube group.

[0037] In some embodiments, a depth of the insertion groove is half of a length of the buffer tube along the axial direction.

[0038] As a result, the shape of the buffer tube formed after plugging can be made more regular, the interference with other components can be reduced, and the convenience of installation can be improved.

[0039] A second aspect of the embodiments of the present application discloses an energy storage device, comprising a plurality of battery devices according to the first aspect of the embodiments of the present application, wherein the battery devices are used to store or provide electrical energy.

[0040] Since the energy storage device includes the battery device disclosed in the first aspect, the battery device has good structural stability and buffering capacity, which is beneficial to improving the stability of the energy storage device.

[0041] A third aspect of the embodiments of the present application discloses an electrical device, comprising the battery device described in the first aspect of the embodiments of the present application or the energy storage device described in the second aspect of the embodiments of the present application, wherein the battery device is used to store or provide electrical energy.

[0042] Since the electrical device includes the battery device disclosed in the first aspect or the energy storage device disclosed in the second aspect, it is beneficial to improve the stability of the electrical device.

[0043] Through the present application, the frame rigidity of the battery device can be improved while utilizing the energy absorption unit disposed inside the frame to disperse the impact load, absorb part of the impact energy, and improve the structural stability and buffering capacity of the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0045] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application;

[0046] Figure 2A three-dimensional exploded schematic diagram of a battery device provided in some embodiments of the present application;

[0047] Figure 3 A schematic diagram of the structure of a battery device provided for other embodiments of the present application;

[0048] Figure 4 A three-dimensional exploded schematic diagram of a first frame provided for some embodiments of the present application;

[0049] Figure 5 A schematic structural diagram of a first frame provided for some embodiments of the present application;

[0050] Figure 6 A schematic diagram of the structure of an energy absorbing unit provided in some embodiments of the present application;

[0051] Figure 7 A schematic structural diagram of a first frame provided for other embodiments of the present application;

[0052] Figure 8 A schematic diagram of the structure of an energy absorbing unit provided in some other embodiments of the present application;

[0053] Fig. 9 for Figure 8 Sectional view at AA in the middle;

[0054] Fig.10 A schematic diagram of the structure of a buffer tube group provided for some embodiments of the present application;

[0055] Fig.11 A three-dimensional exploded schematic diagram of a buffer tube assembly provided for some embodiments of the present application;

[0056] Fig.12 A schematic diagram of the structure of an energy storage unit provided for some embodiments of the present application.

[0057] Description of Reference Numerals

[0058] 100-battery device, 101-battery cell, 110-frame, 111-first frame, 111a-first wall, 111b-second wall, 111c-third wall, 111d-fourth wall, 112-second frame, 113-buffer cavity, 120-energy absorption unit, 121-sub-energy absorption unit, 130-buffer tube group, 131-buffer tube, 131a-first protrusion, 131b-second protrusion, 132-bending plate, 132a-plug-in slot, 133-first bending section, 134-second bending section, 140-buffer plate, 141-first buffer plate, 142-second buffer plate, 200-controller, 300-motor, 1000-vehicle, 2000-energy storage device, S-accommodation space. DETAILED DESCRIPTION

[0059] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein 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 of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0061] In the description of the embodiments of the present application, the technical terms "first", "second", "third", 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 clearly and specifically defined.

[0062] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations 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. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0063] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0064] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0065] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0066] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0067] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical terms "parallel" and "perpendicular" are both allowed to have a certain degree of tolerance and / or error, including the situations of being approximately parallel and approximately perpendicular.

[0068] Below, this application is described in detail.

[0069] At present, new energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0070] In many application scenarios, during use, battery devices may be subjected to external vibration impacts, causing deformation and damage of internal battery cells. Therefore, how to improve the buffering capacity of battery devices is one of the research and development topics in the industry.

[0071] After research and design, a buffer cavity is designed in the frame of the battery device, and an energy absorption unit is set in the buffer cavity. The buffer plate and buffer tube in the energy absorption unit can disperse the external impact load, and can also absorb the impact energy to reduce the risk of deformation and damage of the battery cell. At the same time, the energy absorption unit is set in the volume space inside the frame, which will not increase the space occupied by the battery device.

[0072] Based on such a design concept, the present application designs a battery device, which includes a plurality of interconnected frames, which enclose a storage space to accommodate battery cells; the plurality of frames include a pair of first frames extending along a first direction, each first frame includes a first wall and a second wall oppositely arranged along a second direction, the first frame has a buffer cavity inside, at least one energy absorption unit is arranged inside the buffer cavity, the energy absorption unit includes a buffer plate and a buffer tube connected to the buffer plate, the buffer plate is arranged perpendicular to the second direction and the axial direction of the buffer tube is perpendicular to the second direction, and the first wall and the second wall are respectively in contact with the energy absorption unit.

[0073] Since the first frame has a buffer cavity inside and an energy-absorbing unit is arranged inside the buffer cavity, the cavity inside the frame can be effectively utilized, reducing the occupation of the storage space by the energy-absorbing unit; at the same time, the rigidity of the frame can be improved, the deformation of the frame can be suppressed to a certain extent, and the degree of squeezing of the battery cells in the storage space can be reduced, so as to reduce the risk of adverse conditions of the battery cells due to squeezing.

[0074] On the other hand, the impact load acting on the frame along the second direction can be transmitted to the energy absorbing unit, and the impact load is dispersed by the buffer plate and the buffer tube relatively arranged along the second direction. The buffer tube can also absorb part of the impact energy, thereby improving the structural stability and buffering capacity of the battery device.

[0075] In the following embodiments, for the convenience of description, the electric device of one embodiment of the present application is taken as a vehicle 1000 as an example for description. The following is a description with reference to the accompanying drawings.

[0076] Figure 1 The schematic diagram of the structure of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. Figure 1 As shown, a battery device 100 is disposed inside the vehicle 1000, and the battery device 100 can be disposed 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 working power requirements of the vehicle 1000 during driving.

[0077] 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.

[0078] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0079] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0080] Although not shown in the figure, a battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and released back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0081] In some embodiments, the electrode assembly is provided with tabs (not shown), which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0082] In some embodiments, the electrode assembly may be a wound structure, a laminated structure, or a mixed structure of a wound structure and a laminated structure.

[0083] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0084] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in this application.

[0085] In some embodiments, the housing includes a shell and an end cap, the shell is provided with an opening, and the end cap closes the opening to form a closed space for accommodating substances such as the electrode assembly and the electrolyte. The shell may be provided with one or more openings. One or more end caps may also be provided.

[0086] In some embodiments, the housing may be a sealed structure or a non-sealed structure. As an example, when the housing is a non-sealed structure, the housing plays a role in protecting the electrode assembly, and a sealed bag is also included between the housing and the electrode assembly, and the sealed bag is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealed bag may be a bag-shaped insulating member or an aluminum-plastic film. When the housing is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0087] In some embodiments, Figure 3As shown, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the pole lug (not shown). The electrode terminal can be directly connected to the pole lug, or indirectly connected to the pole lug through a current collecting member. The electrode terminal can be provided on the end cap or on the housing.

[0088] The emissions from the battery cells mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of the isolation membrane, high-temperature and high-pressure gas generated by the reaction, flames, etc.

[0089] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0090] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, a battery cell assembly may be a battery module, and a battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, a battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0091] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0092] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0093] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0094] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0095] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0096] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0097] In some embodiments, the battery device refers to an energy storage device, which includes a box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0098] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells and battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0099] Below, refer to Figures 2 to 12 Some embodiments of the present application are described in detail.

[0100] Figure 2 A three-dimensional exploded schematic diagram of a battery device provided in some embodiments of the present application; Figure 3 A schematic diagram of the structure of a battery device provided for other embodiments of the present application; Figure 4 A three-dimensional exploded schematic diagram of a first frame provided for some embodiments of the present application; Figure 5 A schematic structural diagram of a first frame provided for some embodiments of the present application; Figure 6 A schematic diagram of the structure of an energy absorbing unit provided in some embodiments of the present application; Figure 7 A schematic structural diagram of a first frame provided for other embodiments of the present application; Figure 8 A schematic diagram of the structure of an energy absorbing unit provided in some other embodiments of the present application; Fig. 9 for Figure 8 Sectional view at AA in the middle; Fig.10 A schematic diagram of the structure of a buffer tube group provided for some embodiments of the present application; Fig.11 A three-dimensional exploded schematic diagram of a buffer tube assembly provided for some embodiments of the present application; Fig.12 A schematic diagram of the structure of an energy storage unit provided for some embodiments of the present application.

[0101] In some embodiments of the present application, for the convenience of explanation, a first direction, a second direction and a third direction are set, and the directions of the first direction, the second direction and the third direction are directions that intersect each other, and here, intersecting each other includes perpendicularly intersecting each other. For the convenience of understanding the embodiments of the present application, in the embodiments shown in Figures 3 to 9, the first direction, the second direction and the third direction are used as examples of directions that intersect each other perpendicularly, but those skilled in the art should understand that the embodiments of the present application are not limited to the situation where the three directions intersect each other perpendicularly. For the convenience of explanation, as shown by the arrows in Figures 2 to 11, the direction where the arrow X is located is the first direction, the direction where the arrow Y is located is the second direction, and the direction where the arrow Z is located is the third direction. Sometimes the direction indicated by the arrow Z along the third direction is also called "above", and the opposite direction is called "below"; in some embodiments, the first direction can be the forward and backward direction of the vehicle.

[0102] A first aspect of an embodiment of the present application discloses a battery device 100, which includes a plurality of mutually connected frames 110, which enclose a storage space S to store a battery cell 101; the plurality of frames 110 include a pair of first frames 111 extending along a first direction (X), each first frame 111 includes a first wall 111a and a second wall 111b perpendicular to a second direction (Y), the first frame 111 has a buffer cavity 113 inside, at least one energy absorption unit 120 is arranged inside the buffer cavity 113, the energy absorption unit 120 includes a buffer plate 140 and a buffer tube 131 connected to the buffer plate 140, the buffer plate 140 is arranged perpendicular to the second direction (Y) and the axial direction of the buffer tube 131 is perpendicular to the second direction (Y), and the first wall 111a and the second wall 111b are in contact with the energy absorption unit 120 respectively.

[0103] In the embodiment of the present application, the shapes of the plurality of interconnected frames 110 include but are not limited to rectangular, circular, triangular, pentagonal, hexagonal, diamond or elliptical structures, etc. Accordingly, the shape of the accommodating space S matches the shape of the frame 110 .

[0104] Optionally, the frame 110 may be a straight frame structure extending along a straight line, or may be a curved frame structure.

[0105] Exemplarily, the frame 110 may include a pair of first frames 111 extending along a first direction (X) and a pair of second frames 112 extending along a second direction (Y), the first frames 111 and the second frames 112 are connected end to end in sequence to form a rectangular frame structure, and the connection and fixing methods between two adjacent frames 110 include but are not limited to screw connection, riveting, welding, bonding or clamping, etc. Of course, in some embodiments, along the circumference of the frame 110, a transition connector may be provided between two adjacent frames 110, and the transition connector is welded and fixed to at least part of the frame 110.

[0106] Therefore, the frame 110 is set to a structure formed by splicing the first frame 111 and the second frame 112, which improves the convenience of processing the frame 110 and further improves the processing efficiency of the frame 110. The rectangular shape of the frame 110 is also suitable for assembling the battery cell 101.

[0107] Optionally, the frame 110 can be manufactured by die-casting, roll-forming, extrusion, or cutting and molding using profiles.

[0108] It is understandable that the material of the frame 110 should have sufficient strength, rigidity and corrosion resistance to support and protect the battery device 100 while reducing weight as much as possible to improve energy efficiency. Commonly used materials include aluminum alloy, high-strength steel or composite materials.

[0109] Optionally, the frame 110 can be made of a metal material with a certain strength, such as a steel material. For example, L-shaped angle steel, I-shaped steel, C-shaped steel or Z-shaped steel can be used for manufacturing. The embodiment of the present application does not limit the formation method of the frame 110.

[0110] Optionally, although not shown in the figure, the battery device 100 may further include a cover and a bottom plate, and the cover and the bottom plate may respectively close the frame 110 from both sides along the third direction (Z) to form a receiving space S. The closing here means covering or closing, which may be sealed or unsealed. The cover and the bottom plate may be formed into a generally flat plate shape, which is not particularly limited in the embodiment of the present application.

[0111] In an embodiment of the present application, each first frame 111 includes a first wall 111a and a second wall 111b arranged opposite to each other along the second direction (Y). The first wall 111a and the second wall 111b may be connected by a third wall 111c and a fourth wall 111d. The third wall 111c and the fourth wall 111d may be parallel to the second direction (Y) or may not be parallel to the second direction (Y).

[0112] For example, Figure 6As shown, the first wall 111 a , the second wall 111 b , the third wall 111 c and the fourth wall 111 d are directly connected to each other, and form a rectangular shape when viewed along the first direction (X).

[0113] In the embodiment of the present application, a buffer cavity 113 is defined inside the first frame 111 , and the shape of the buffer cavity 113 may be the same as or different from the shape of the first frame 111 .

[0114] Optionally, the buffer cavity 113 may extend along the first direction (X) and pass through the first frame 111 ; further optionally, a plurality of buffer cavities 113 may be arranged at intervals in the first frame 111 along the first direction (X).

[0115] For example, when viewed along the first direction (X), the shape of the buffer cavity 113 may be the same as that of the first frame 111. Figure 3 As shown, the first frame 111 is a thin-walled frame body, and a buffer cavity 113 is formed inside.

[0116] As another example, Figure 2 As shown, when viewed along the first direction (X), the buffer cavity 113 may be formed only in a portion away from the side of the battery cell 101 along the second direction (Y), so as to buffer external impact.

[0117] In an embodiment of the present application, at least one energy absorbing unit 120 is arranged inside the buffer cavity 113. The energy absorbing unit 120 includes a buffer plate 140 and a buffer tube 131 connected to the buffer plate 140. The buffer plate 140 is arranged perpendicular to the second direction (Y) and the axial direction of the buffer tube 131 is perpendicular to the second direction (Y). The first wall 111a and the second wall 111b are respectively in contact with the energy absorbing unit 120.

[0118] It can be understood that the buffer plate 140 and the buffer tube 131 can buffer and absorb external forces, such as collision force, extrusion force, etc.

[0119] For example, the buffer plate 140 may include a metal plate with a certain thickness, such as a steel plate. The buffer tube 131 may be a metal tube or a composite material tube with a cavity, such as a steel tube.

[0120] Optionally, the number of the buffer plates 140 may be one or more, and the number of the buffer tubes 131 may be one or more, which may be determined according to the size of the buffer cavity 113 and the buffer unit and the energy absorption design requirements, and the embodiment of the present application does not limit this.

[0121] Optionally, the buffer plate 140 may have an internal cavity or a solid structure. Optionally, the surface of the buffer plate 140 may be a flat surface or a surface with a concave-convex structure. The embodiment of the present application does not limit the structure of the buffer plate 140.

[0122] Optionally, the buffer plate 140 may be integrally formed with the first frame 111 , or may be a separate assembly structure.

[0123] Optionally, the buffer tube 131 may be a circular tube, an elliptical tube, a square tube or the like.

[0124] Optionally, the buffer tube 131 may be an integrally formed structure, for example, manufactured by extrusion molding; or the buffer tube 131 may be formed by splicing a plurality of tube sections.

[0125] Optionally, each buffer tube 131 may have a consistent tube diameter and thickness. It is also possible to design multiple tube sections with different tube diameters and thicknesses according to energy absorption requirements and splice them into the buffer tube 131 .

[0126] Optionally, the buffer tube 131 may be filled with foam material, such as foam aluminum, polyurethane foam, etc. to enhance the energy absorption effect; or it may not be filled.

[0127] In the embodiment of the present application, the first wall 111a and the second wall 111b are in contact with the energy absorbing unit 120 respectively, and the above-mentioned contact can be direct contact, such as abutment or fixed connection, and the fixed connection includes but is not limited to welding, riveting, clamping or bonding, etc. It can also be indirect contact through an intermediate medium, such as indirect contact through other force transmission structures or collapse energy absorbing structures. The embodiment of the present application does not limit this.

[0128] Since the first frame 111 has a buffer cavity 113 inside and an energy absorption unit 120 is arranged inside the buffer cavity 113, the cavity inside the frame 110 can be effectively utilized, reducing the occupation of the storage space S by the energy absorption unit 120; at the same time, the rigidity of the frame 110 can be improved, and the deformation of the frame 110 can be suppressed to a certain extent, thereby reducing the degree of squeezing of the battery cell 101 in the storage space S, so as to reduce the risk of adverse conditions occurring in the battery cell 101 due to squeezing.

[0129] In the embodiment of the present application, the axial direction of the buffer tube 131 is perpendicular to the second direction (Y), and the buffer tube 131 may extend along the first direction (X) or along the third direction (Z).

[0130] It is understandable that the axial direction of the buffer tube 131 is perpendicular to the second direction (Y), and the wall of the buffer tube 131 can absorb the impact energy through elastic deformation and plastic deformation or even destruction after being impacted in the radial direction, i.e., the second direction (Y), thereby reducing the impact load on the battery cell 101. When the buffer plate 140 has an internal cavity, it can absorb a certain amount of impact energy, and can also provide a deformation space for the buffer tube 131. Or when the buffer plate 140 is a solid structure, it can improve the rigidity of the first frame 111, and can also disperse and transfer the impact load in the second direction (Y) to other parts of the first frame 111, such as the third wall 111c and the fourth wall 111d, so that more frame 110 structures participate in the process of dispersing the impact load and absorbing energy, and absorb and disperse the impact force through the frame 110 and the energy absorption unit 120, thereby protecting the integrity of the accommodation space S, reducing the extrusion deformation of the battery cell 101, and improving the stability of the battery device 100.

[0131] Therefore, the impact load acting on the frame 110 along the second direction (Y) can be transmitted to the energy absorbing unit 120 by the first wall 111a or the second wall 111b, and the impact load is dispersed by the buffer plate 140 and the buffer tube 131 arranged perpendicular to the second direction (Y). The buffer tube 131 can also absorb part of the impact energy, thereby improving the structural stability and buffering capacity of the battery device 100.

[0132] In an embodiment of the present application, the buffer tubes 131 are arranged into a buffer tube group 130 along a direction perpendicular to the axial direction, outer surfaces of adjacent buffer tubes 131 in the buffer tube group 130 are in contact with each other, the energy absorbing unit 120 includes at least one group of buffer tube groups 130, and the axial direction and arrangement direction of the buffer tubes 131 are perpendicular to the second direction (Y).

[0133] For example, the axial direction of the buffer tube 131 may be a first direction (X), and the direction in which the buffer tubes 131 in the buffer tube group 130 are arranged may be a third direction (Z).

[0134] As another example, the axial direction of the buffer tube 131 may be the third direction (Z), and the direction in which the buffer tubes 131 in the buffer tube group 130 are arranged may be the first direction (X).

[0135] Optionally, the outer surfaces of adjacent buffer tubes 131 in the buffer tube group 130 are in contact with each other, and the contact may be direct contact, such as abutment or fixed connection, and the fixed connection includes but is not limited to welding, riveting, clamping or bonding, etc. It may also be indirect contact through an intermediate medium, such as indirect contact through other force transmission structures or collapse energy absorption structures. This embodiment of the application is not limited to this.

[0136] Optionally, the plurality of buffer tube groups 130 disposed in the buffer cavity 113 may be arranged along the second direction (Y) to enhance the energy absorption effect.

[0137] Since the buffer tubes 131 are arranged in a direction perpendicular to the axial direction of the buffer tubes 131 to form a buffer tube group 130, a larger buffer area can be formed on the collision plane perpendicular to the second direction (Y), covering more battery cells 101. In addition, adjacent buffer tubes 131 are in contact with each other, which is conducive to transferring and dispersing the impact load acting on the frame 110 along the second direction (Y) to more buffer tubes 131, further improving the buffering capacity of the energy absorbing unit 120.

[0138] In an embodiment of the present application, the first frame 111 includes a third wall 111c and a fourth wall 111d perpendicular to the third direction (Z), and the first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other; the axial direction of the buffer tube 131 is the first direction (X), and the buffer tube 131 is arranged into a buffer tube group 130 along the third direction (Z), and the buffer tube group 130 is respectively connected to the third wall 111c and the fourth wall 111d along the third direction (Z).

[0139] For example, Figure 5 , Figure 6 As shown, the axial direction of the buffer tube 131 is the first direction (X), and the buffer tubes 131 are arranged along the third direction (Z) to form a buffer tube group 130. The plurality of buffer tube groups 130 are arranged along the second direction (Y).

[0140] Thus, the flexibility of arranging the buffer tubes 131 can be improved, and the size and quantity of the buffer tubes 131 can be flexibly selected according to the size of the first frame 111 along the third direction (Z), so as to facilitate adaption to battery devices 100 of different sizes. In addition, the connection of the buffer tube group 130 with the third wall 111c and the fourth wall 111d is also conducive to improving the rigidity of the first frame 111, reducing the risk of the energy absorbing unit 120 being separated from the frame 110 or making abnormal noises due to vibration in the application scenario, improving the reliability of the battery device 100, and when impacted, the impact load can also be transmitted to the third wall 111c and the fourth wall 111d, reducing the damage of the impact load to the battery cell 101, and further improving the overall structural stability and buffering capacity of the battery device 100.

[0141] In an embodiment of the present application, the first frame 111 includes a third wall 111c and a fourth wall 111d perpendicular to the third direction (Z), and the first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other; the axial direction of the buffer tube 131 is the third direction (Z), and the buffer tube 131 is arranged into a buffer tube group 130 along the first direction (X), and the buffer tube 131 is respectively connected to the third wall 111c and the fourth wall 111d along the third direction (Z).

[0142] For example, Figure 7 , Figure 8 , Fig. 9 As shown, the axial direction of the buffer tube 131 is the first direction (X), and the buffer tubes 131 are arranged along the third direction (Z) to form a buffer tube group 130. The plurality of buffer tube groups 130 are arranged along the second direction (Y).

[0143] Thus, the flexibility of arranging the buffer tubes 131 can be improved, and the size and quantity of the buffer tubes 131 can be flexibly selected according to the size of the first frame 111 along the first direction (X), so as to facilitate adaption to battery devices 100 of different sizes. In addition, the connection of the buffer tube group 130 with the third wall 111c and the fourth wall 111d is also conducive to improving the rigidity of the first frame 111, reducing the risk of the energy absorbing unit 120 being separated from the frame 110 or making abnormal noises due to vibration in the application scenario, improving the reliability of the battery device 100, and when impacted, the impact load can also be transferred to the third wall 111c and the fourth wall 111d, reducing the damage of the impact load to the battery cell 101, and further improving the overall structural stability and buffering capacity of the battery device 100.

[0144] In the embodiment of the present application, the buffer tube 131 is a circular tube.

[0145] It is understandable that the outer edge and the inner edge of the circular tube are both circular. Specifically, it can be a thin-walled circular tube.

[0146] Since the buffer tube 131 is a circular tube, the buffer tube 131 has the characteristics of simple structure and convenient manufacturing. In addition, the contact between the circular tube and the outside is surface-to-surface contact. Due to inertia, after the circular tube is impacted, the impact surface is deformed, and the deformation gradually moves along the circumference of the buffer tube 131, so that more material on the cross section of the buffer tube 131 participates in the absorption of energy and is transmitted to other buffer tubes 131 and the buffer plate 140 through the contact surface, which is beneficial to improve the buffering effect of the energy absorption unit 120. The hollow circular tube has a small mass, which can reduce the weight of the battery device 100 to a certain extent.

[0147] In the embodiment of the present application, in the buffer tube group 130 , the wall thickness D of each buffer tube 131 is the same, and / or the inner diameter of each buffer tube 131 is the same.

[0148] As a result, the buffering effect at different positions in the buffer tube group 130 is more uniform, and batch processing and assembly of the buffer tubes 131 are also convenient. The same size is also conducive to designing the arrangement and quantity of the buffer plates 140 and the buffer tubes 131 according to the size.

[0149] In the embodiment of the present application, the buffer tube assembly 130 includes an integrally formed member made of steel.

[0150] Therefore, the steel material can improve the rigidity of the buffer tube group 130 and the frame 110 , the one-piece molding structure can reduce the amount of fixed connectors, save the cost of welding and fixing the buffer tube 131 , and is also beneficial to improving the processing efficiency of the buffer tube group 130 .

[0151] In the embodiment of the present application, a plurality of buffer tube groups 130 are arranged along the second direction (Y), and at least one buffer plate 140 is disposed between adjacent buffer tube groups 130 .

[0152] For example, Figure 6 , Fig. 9 As shown, two buffer plates 140 are disposed between adjacent buffer tube groups 130 .

[0153] Therefore, under the action of impact load, each buffer tube group 130 cooperates with the buffer plate 140 to deform and absorb energy more easily, thereby improving the energy absorption effect of the energy absorption unit 120 .

[0154] In the embodiment of the present application, the buffer tube group 130 includes two mutually connected bending plates 132. Along the arrangement direction of the buffer tubes 131, the bending plates 132 include alternately connected first bending sections 133 and second bending sections 134. The first bending sections 133 have a first protruding portion 131a protruding toward one side along the second direction (Y), and the second bending sections 134 have a second protruding portion 131b protruding toward the other side along the second direction (Y). The first protruding portion 131a of one bending plate 132 is opposite to the second protruding portion 131b of the other bending plate 132, and the first protruding portion 131a and the second protruding portion 131b protrude in directions away from each other along the second direction (Y).

[0155] Optionally, the bending plate 132 may be a metal plate, and illustratively, the bending plate 132 may be a steel plate. The embodiment of the present application does not limit the forming method of the bending plate 132.

[0156] For example, Fig.10 , Fig.11 As shown, the arrangement direction of the buffer tube 131 can be the first direction (X), that is, the axial direction of the buffer tube 131 is the third direction (Z), the first protrusion 131a and the second protrusion 131b are arranged opposite to each other to form the buffer tube 131, and when observed along the third direction (Z), the shape of the buffer tube 131 can be a regular shape such as a circle, an ellipse, a square, etc., or an irregular shape, and the two ends of the bending plate 132 along the first direction (X) can be fixedly connected to each other to improve the rigidity of the buffer tube group 130.

[0157] In some other embodiments not shown in the figure, the arrangement direction of the buffer tubes 131 may also be the third direction (Z), which will not be further described in the embodiment of the present application.

[0158] Therefore, the buffer tube group 130 can be made by connecting two bent plates 132, and the oppositely arranged first protrusion 131a and the second protrusion 131b can surround the tube cavity of the buffer tube 131, which reduces the processing difficulty of the buffer tube group 130, improves the processing efficiency, and also improves the stiffness of the buffer tube group 130 and the energy absorption unit.

[0159] In the embodiment of the present application, a plug-in groove 132a opening toward one side of the axial direction of the buffer tube 131 is formed between the first bending section 133 and the second bending section 134, and the plug-in grooves 132a of the two bending plates 132 are plugged in such a way that the openings are axially opposite to each other.

[0160] For example, Fig.10 , Fig.11 As shown, the arrangement direction of the buffer tubes 131 may be the first direction (X), that is, the axial direction of the buffer tubes 131 is the third direction (Z), and the plug-in grooves 132a of the two bending plates 132 correspond one to one to achieve mutual plug-in.

[0161] Therefore, the plug-in groove 132 a is conducive to the assembly of the bent plate 132 , and the two bent plates 132 can be plug-connected, which reduces the assembly difficulty of the buffer tube group 130 and improves the assembly efficiency of the buffer tube group 130 .

[0162] In the embodiment of the present application, the depth of the insertion groove 132 a is half of the axial length of the buffer tube 131 .

[0163] For example, Fig.11 As shown, the insertion groove 132 a may be formed by the bending plate 132 being recessed along the third direction (Z).

[0164] It is understood that the depth of the insertion slot 132a may allow for a certain degree of tolerance and / or error.

[0165] As a result, the shape of the buffer tube 131 formed after plugging can be made more regular, thereby reducing interference with other components and improving installation convenience.

[0166] In an embodiment of the present application, the energy absorption unit 120 includes at least one sub-energy absorption unit 121, and each sub-energy absorption unit 121 includes a first buffer plate 141 and a second buffer plate 142 arranged opposite to each other along the second direction (Y); along the second direction (Y), a group of buffer tube groups 130 is arranged between the first buffer plate 141 and the second buffer plate 142.

[0167] Optionally, in the buffer cavity 113, the structural dimensions of the plurality of sub-energy absorbing units 121 are the same. Thus, during the production process, the plurality of sub-energy absorbing units 121 can be manufactured by the same mold, process, etc., which is conducive to reducing production costs and improving production efficiency. In addition, during the assembly process, there is no need to distinguish the sub-energy absorbing units 121, which is conducive to improving assembly efficiency.

[0168] Alternatively, the structural dimensions of the plurality of sub-energy absorbing units 121 are different, or some are the same and some are different. The sub-energy absorbing units 121 of different dimensions can be filled according to the dimensions of the buffer cavity 113 or design requirements.

[0169] For example, Figure 4 , Figure 5 , Figure 6 As shown, the energy absorbing unit 120 includes three sub-energy absorbing units 121, and the sub-energy absorbing unit 121 includes a first buffer plate 141 and a second buffer plate 142 arranged opposite to each other along the second direction (Y); along the second direction (Y), a group of buffer tube groups 130 is arranged between the first buffer plate 141 and the second buffer plate 142.

[0170] Of course, in an embodiment not shown in the figure, the number of the sub-energy absorption units 121 can also be one, two, etc., and the embodiment of the present application is not limited to this.

[0171] Thus, the number of sub-energy absorbing units 121 can be flexibly configured according to the length of the buffer cavity 113 along the second direction (Y), making it easier to adapt to buffer cavities 113 of different sizes, while taking into account the rigidity and buffering effect of the frame 110. At the same time, the buffer tube group 130 is arranged between the first buffer plate 141 and the second buffer plate 142, which is conducive to the deformation of the buffer tube 131 to absorb energy. The buffer tube 131 can also transmit the impact force to the buffer plate 140 through the contact portion with the two buffer plates 140.

[0172] In addition, the sub-energy absorbing unit 121 can be pre-manufactured. Since the sub-energy absorbing unit 121 has a simple structure and is easy to assemble, the assembly efficiency of the frame 110 can be improved, and the production efficiency of the battery device 100 can be improved.

[0173] In the embodiment of the present application, adjacent sub-energy absorbing units 121 are fixedly connected along the second direction (Y).

[0174] In order to show other components clearly, Figure 6 , Fig. 9 The fixed connection part of the adjacent sub-energy absorbing units 121 is omitted. The fixed connection method of the adjacent sub-energy absorbing units 121 includes but is not limited to bolt connection, welding, riveting, clamping or bonding, etc. This embodiment of the application does not limit this.

[0175] Since the adjacent sub-energy absorption units 121 are fixedly connected, the rigidity and natural frequency of the first frame 111 can be improved, the risk of resonance of the sub-energy absorption unit 121 can be reduced, and the risk of abnormal noise from the battery device 100 in the application scenario can also be reduced, thereby improving the reliability of the battery device 100. In addition, the fixed connection can effectively transmit the impact load and improve the energy absorption effect.

[0176] In the embodiment of the present application, the thickness D3 of the first buffer plate 141 is equal to the wall thickness D of the buffer tube 131 , and / or the thickness D4 of the second buffer plate 142 is equal to the wall thickness D of the buffer tube 131 .

[0177] Therefore, it is convenient to use the same raw material plate to manufacture the buffer plate 140 and the buffer tube 131 , thereby improving the processing efficiency of the energy absorbing unit 120 .

[0178] In an embodiment of the present application, a ratio of the wall thickness D of the buffer tube 131 to the thickness D1 of the first wall 111a is in a range of 0.5 to 0.7, and / or a ratio of the wall thickness D of the buffer tube 131 to the thickness D2 of the second wall 111b is in a range of 0.5 to 0.7.

[0179] Exemplarily, the ratio of the wall thickness D of the buffer tube 131 to the thickness D1 of the first wall 111 a may be 0.5, 0.55, 0.6, 0.65, 0.7, etc., and other values ​​are not listed in the embodiments of the present application.

[0180] As another example, the ratio of the wall thickness D of the buffer tube 131 to the thickness D2 of the second wall 111 b may be 0.5, 0.55, 0.6, 0.65, 0.7, etc., and other values ​​are not listed in the embodiments of the present application.

[0181] Optionally, the thickness D1 of the first wall 111 a and the thickness D2 of the second wall 111 b may be equal or different.

[0182] For example, Figure 6 As shown, the thickness D1 of the first wall 111 a and the thickness D2 of the second wall 111 b may be equal.

[0183] Therefore, the wall thickness D of the buffer tube 131 is within an appropriate range, and both the weight of the battery device 100 and the specific energy absorption effect of the sub-energy absorption unit 121 can be taken into consideration.

[0184] In the embodiments of the present application, Fig. 9 As shown, along the second direction (Y), the length H1 of the sub-energy absorbing unit 121 along the second direction (Y) is 6 mm to 8 mm, and / or the interval H between the first wall 111 a and the second wall 111 b is 18 mm to 24 mm.

[0185] Exemplarily, the length H1 of the sub-energy absorbing unit 121 along the second direction (Y) may be 6 mm, 6.25 mm, 6.5 mm, 6.75 mm, 7 mm, 7.25 mm, 7.5 mm, 7.75 mm, 8 mm, etc., and other values ​​are not listed in the embodiments of the present application.

[0186] Exemplarily, the distance H between the first wall 111a and the second wall 111b can be 18mm, 18.5mm, 19mm, 19.5mm, 20mm, 20.5mm, 21mm, 21.5mm, 22mm, 22.5mm, 23mm, 23.5mm, 24mm, etc., and other values ​​are not listed in the embodiments of the present application.

[0187] Therefore, the above values ​​are within a suitable range, and a suitable number of sub-energy absorbing units 121 can be reasonably designed and arranged according to the size of the buffer cavity 113 of the battery device 100 of different sizes, so as to fully utilize the internal space of the frame 110 .

[0188] Optionally, the energy absorption unit 120 includes a plurality of sub-energy absorption units 121, and more sub-energy absorption units 121 with smaller dimensions along the second direction (Y) may be arranged on the side close to the battery cell 101. Thus, more buffer units may be arranged in the buffer space close to the battery cell 101, further improving the rigidity of the frame 110 on the side close to the battery cell 101, and improving the structural stability of the frame 110 and the battery device 100.

[0189] A second aspect of the embodiments of the present application discloses an energy storage device 2000, such as Fig.12 As shown, it includes multiple battery devices 100 according to the first aspect of the embodiments of the present application, and the battery device 100 is used to store or provide electrical energy.

[0190] Since the energy storage device 2000 includes the battery device 100 disclosed in the first aspect, the battery device 100 has good structural stability and buffering capacity, which is beneficial to improving the stability of the energy storage device 2000.

[0191] A third aspect of the embodiments of the present application discloses an electrical device, including the battery device 100 of the first aspect of the embodiments of the present application or the energy storage device 2000 of the second aspect of the embodiments of the present application, wherein the battery device 100 is used to store or provide electrical energy.

[0192] Since the electrical device includes the battery device 100 disclosed in the first aspect or the energy storage device 2000 disclosed in the second aspect, it is beneficial to improve the stability of the electrical device.

[0193] In the embodiments of the present application, Figure 1As shown, the electric device is a vehicle 1000 , and the first direction (X) is the forward and backward direction of the vehicle 1000 . The second direction (Y) is the width direction of the vehicle 1000 .

[0194] Since the first direction (X) is the forward and backward direction of the vehicle 1000, the first frame 111 can protect the battery cells 101 from both sides of the vehicle 1000. Therefore, the battery cells 101 can be protected from being squeezed or impacted from the side of the vehicle 1000. Even in the event of a side collision of the vehicle 1000, the risk of damage to the battery cells 101 can be reduced.

[0195] The following is a description with reference to specific embodiments and drawings.

[0196] In a specific embodiment, the embodiment of the present application discloses a battery device 100, the structural design of the battery device 100 can cope with different dimensions of side collisions and meet the requirements of side collision prevention for rigidity and energy absorption functions.

[0197] like Figures 2 to 11 As shown, the present application designs a battery device 100, which includes a plurality of mutually connected frames 110, the plurality of frames 110 include a pair of first frames 111 extending along a first direction (X), each first frame 111 includes a first wall 111a and a second wall 111b perpendicular to a second direction (Y), the first frame 111 has a buffer cavity 113 inside, at least one energy absorption unit 120 is arranged inside the buffer cavity 113, the energy absorption unit 120 includes a buffer plate 140 and a buffer tube 131 connected to the buffer plate 140, the buffer plate 140 is arranged perpendicular to the second direction (Y) and the axial direction of the buffer tube 131 is perpendicular to the second direction (Y), and the first wall 111a and the second wall 111b are respectively in contact with the energy absorption unit 120.

[0198] The buffer tubes 131 are arranged into a buffer tube group 130 along a direction perpendicular to the axial direction of the buffer tubes 131. The outer surfaces of adjacent buffer tubes 131 in the buffer tube group 130 are in contact with each other. The energy absorbing unit 120 includes at least one sub-energy absorbing unit 121. Each sub-energy absorbing unit 121 includes a first buffer plate 141 and a second buffer plate 142 that are arranged opposite to each other along the second direction (Y). Along the second direction (Y), a group of buffer tube groups 130 is arranged between the first buffer plate 141 and the second buffer plate 142.

[0199] A plurality of sub-energy absorbing units 121 may be connected together by welding to prevent resonance.

[0200] Each sub-energy absorption unit 121 has the same structural size and can meet the requirements of side impact energy absorption and strength.

[0201] The sub-energy absorbing unit 121 is easy to process and has high efficiency in assembly, which is conducive to modular large-scale production.

[0202] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0203] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0204] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is 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 replace some or all of the technical features therein by equivalents; 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 present application, and they should all be included in the scope of protection requested in the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of protection requested.

Claims

1. A battery device, characterized in that: It comprises a plurality of mutually connected frames, wherein the frames enclose to form a receiving space, and the receiving space receives the battery cells; The plurality of frames include a pair of first frames extending along a first direction, each of the first frames includes a first wall and a second wall arranged opposite to each other along a second direction, a buffer cavity is provided inside the first frame, and at least one energy absorbing unit is arranged inside the buffer cavity, The energy absorbing unit includes a buffer plate and a buffer tube connected to the buffer plate. The buffer plate is arranged perpendicular to the second direction and the axial direction of the buffer tube is perpendicular to the second direction, and the first wall and the second wall are in contact with the energy absorbing unit respectively.

2. The battery device according to claim 1, characterized in that: The buffer tubes are arranged into a buffer tube group along a direction perpendicular to the axial direction, outer surfaces of adjacent buffer tubes in the buffer tube group are in contact with each other, the energy absorbing unit includes at least one buffer tube group, and the axial direction and the arrangement direction of the buffer tubes are perpendicular to the second direction in pairs.

3. The battery device according to claim 2, characterized in that: The first frame includes a third wall and a fourth wall perpendicular to a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; The axial direction is the first direction, the buffer tubes are arranged along the third direction to form the buffer tube group, and the buffer tube group is respectively connected to the third wall and the fourth wall along the third direction.

4. The battery device according to claim 2, characterized in that: The first frame includes a third wall and a fourth wall perpendicular to a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; The axial direction is the third direction, the buffer tubes are arranged along the first direction to form the buffer tube group, and the buffer tubes are respectively connected to the third wall and the fourth wall along the third direction.

5. The battery device according to claim 2, characterized in that: The buffer tube is a circular tube.

6. The battery device according to claim 5, characterized in that: In the buffer tube group, the wall thickness of each buffer tube is the same, and / or the inner diameter of each buffer tube is the same.

7. The battery device according to claim 5, characterized in that: The buffer tube assembly comprises an integrally formed part made of steel.

8. The battery device according to claim 2, characterized in that: A plurality of the buffer tube groups are arranged along the second direction, and at least one buffer plate is disposed between adjacent buffer tube groups.

9. The battery device according to any one of claims 2 to 8, characterized in that: The energy absorbing unit includes at least one sub-energy absorbing unit, each of which includes a first buffer plate and a second buffer plate arranged opposite to each other along the second direction; along the second direction, a group of buffer tubes is arranged between the first buffer plate and the second buffer plate.

10. The battery device according to claim 9, characterized in that: Along the second direction, adjacent sub-energy absorbing units are fixedly connected.

11. The battery device according to claim 9, characterized in that: The thickness of the first buffer plate is equal to the wall thickness of the buffer tube, and / or the thickness of the second buffer plate is equal to the wall thickness of the buffer tube.

12. The battery device according to claim 11, characterized in that: A ratio of the wall thickness of the buffer tube to the thickness of the first wall is in a range of 0.5 to 0.7, and / or a ratio of the wall thickness of the buffer tube to the thickness of the second wall is in a range of 0.5 to 0.

7.

13. The battery device according to claim 9, characterized in that: Along the second direction, the length of the sub-energy absorption unit along the second direction is 6 mm to 8 mm, and / or the distance between the first wall and the second wall is 18 mm to 24 mm.

14. The battery device according to any one of claims 2 to 8, characterized in that: The buffer tube group includes two mutually connected bending plates. Along the arrangement direction of the buffer tubes, the bending plates include first bending sections and second bending sections that are alternately connected. The first bending sections have a first protrusion that protrudes toward one side along the second direction, and the second bending sections have a second protrusion that protrudes toward the other side along the second direction. The first protrusion of one bending plate is opposite to the second protrusion of the other bending plate, and the first protrusion and the second protrusion protrude in directions away from each other along the second direction.

15. The battery device according to claim 14, characterized in that: An inserting groove opened toward one side of the third direction is formed between the first bending section and the second bending section, and the inserting grooves of the two bending plates are inserted in a manner that the openings thereof are opposite to each other along the axial direction.

16. The battery device according to claim 15, characterized in that: The depth of the insertion groove is half of the length of the buffer tube along the axial direction.

17. An energy storage device, characterized in that: The invention comprises a plurality of battery devices according to any one of claims 1 to 16, wherein the battery devices are used to store or provide electrical energy.

18. An electrical device, characterized in that: The invention comprises the battery device as described in any one of claims 1 to 16 or the energy storage device as described in claim 17, wherein the battery device is used to store or provide electrical energy.

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