Battery devices and electrical equipment

Abstract

The present application relates to a battery device and an electrical device. The battery device includes a box and a battery cell. The box includes a bottom plate and a plurality of frames arranged around the outer periphery of the bottom plate. Each of the frames and the bottom plate are enclosed together to form a storage space for accommodating the battery cell. The frame has a first cavity, and at least part of the cavity wall of the first cavity is bent and protruded in a direction away from the storage space. The bottom plate and the frames in the present application are enclosed together to form a storage space. When the battery cell is placed in the storage space, the box can protect the battery cell. At the same time, at least part of the cavity wall of the first cavity is bent and protruded in a direction away from the storage space. That is, when impacted by external force, since the cavity wall of the first cavity is protruding in the direction of the force, it can effectively absorb energy, reduce the probability of the overall displacement of the frame and thus compressing the battery cell inside the box, and can better protect the battery cell.

Description

Technical Field

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

[0002] A battery pack usually includes a box and a battery cell. The battery cell is arranged inside the box, and the box can provide some protection for the battery cell. However, the frame of the box usually has a high rigidity. When the battery is hit by an external force, the frame is easy to press the battery cell inside the box, affecting the overall structure of the battery pack. Utility Model Content

[0003] Based on this, it is necessary to provide a battery device and electrical equipment to address the problem that when the battery pack is hit by external force, the frame is likely to press the battery cells inside the box, affecting the overall structure of the battery pack.

[0004] In a first aspect, the present application provides a battery device, comprising a box body and a battery cell, wherein the box body comprises a bottom plate and a plurality of frames arranged around the outer periphery of the bottom plate, wherein the frames and the bottom plate together enclose a storage space for accommodating the battery cell; wherein the frame has a first cavity, and at least a portion of the cavity wall of the first cavity is bent and protruded in a direction away from the storage space.

[0005] Therefore, when the battery device is impacted by external force, the cavity wall of the first cavity is convexly arranged in the direction of the force, which can form a good energy absorption effect, not only maintaining good rigidity, but also effectively absorbing energy, better protecting the battery cells in the accommodating space, and providing stability to the overall structure of the battery device.

[0006] In some embodiments, the frame includes a first beam body, the first beam body includes a first longitudinal cavity wall and a second longitudinal cavity wall located on the side of the first cavity away from the accommodating space, a first cavity is formed between the first longitudinal cavity wall and the second longitudinal cavity wall, and at least one of the first longitudinal cavity wall and the second longitudinal cavity wall is bent and protruded in a direction away from the accommodating space.

[0007] Through the above structure, the energy absorption effect of the frame can be effectively improved on the basis of ensuring the overall rigidity of the frame, thereby providing better protection for the battery cells.

[0008] In some embodiments, the first beam body also includes a first transverse cavity wall and a second transverse cavity wall connected between the first longitudinal cavity wall and the second longitudinal cavity wall, and the first longitudinal cavity wall, the second longitudinal cavity wall, the first transverse cavity wall and the second transverse cavity wall together enclose a first cavity; the first beam body also includes a first support wall arranged in the first cavity and connected between the first longitudinal cavity wall and the second longitudinal cavity wall.

[0009] Providing a first support beam in the first cavity can further improve the overall structural strength of the first cavity and make the structure of the first beam more stable.

[0010] In some embodiments, the first support wall is inclined to the first longitudinal cavity wall and / or the second longitudinal cavity wall; and / or, along the direction from the first longitudinal cavity wall to the second longitudinal cavity wall, the cross-sectional shape of the first support wall is wavy.

[0011] Through the above structure, the first supporting wall can not only play a supporting role between the first longitudinal cavity wall and the second longitudinal cavity wall to improve the structural stability of the first beam body, but also can collapse and deform when the box body is impacted by external force, further improving the energy absorption effect.

[0012] In some embodiments, the angle between the first support wall and the first longitudinal cavity wall and / or the second longitudinal cavity wall is 30° to 60°.

[0013] In some embodiments, the frame also includes a second beam body, the second beam body includes a third transverse cavity wall, a fourth transverse cavity wall and a third longitudinal cavity wall, the third transverse cavity wall and the fourth transverse cavity wall are parallel to each other and one end of each is connected to the second longitudinal cavity wall, the third longitudinal cavity wall is connected between the third transverse cavity wall and the fourth transverse cavity wall, and is located at one end of the third transverse cavity wall and the fourth transverse cavity wall away from the second longitudinal cavity wall; wherein the third longitudinal cavity wall is bent and protruded in a direction away from the accommodating space.

[0014] In this way, the third longitudinal cavity wall can form an energy absorption effect with the first longitudinal cavity wall and the second longitudinal cavity wall respectively, which can further improve the energy absorption effect of the entire frame and improve the protection effect on the battery cell.

[0015] In some embodiments, the third transverse cavity wall, the fourth transverse cavity wall and the third longitudinal cavity wall together enclose a second cavity, and the second beam body also includes a second support wall disposed in the second cavity and connected between the third transverse cavity wall and the fourth transverse cavity wall; the second support wall is bent and protruded in a direction away from the accommodating space.

[0016] In this way, the second supporting wall can form an energy-absorbing effect together with the first longitudinal cavity wall, the second longitudinal cavity wall and the third longitudinal cavity wall, further improving the energy-absorbing effect of the frame as a whole and improving the protection of the battery cells.

[0017] In some embodiments, the ratio between the protrusion depth of the first longitudinal cavity wall and / or the second longitudinal cavity wall and the width of the first transverse cavity wall or the second transverse cavity wall is less than 50%;

[0018] And / or, a ratio between a protruding depth of the third longitudinal cavity wall and / or the second supporting wall and a width of a section of the third transverse cavity wall or the fourth transverse cavity wall between the third longitudinal cavity wall and the second supporting wall is less than 50%.

[0019] Setting the protruding depth of the first longitudinal cavity wall and / or the second longitudinal cavity wall and / or the third longitudinal cavity wall and / or the second supporting wall to the above range can minimize the overall volume of the box and the battery device while improving the energy absorption effect of the frame.

[0020] In some embodiments, the second beam body further includes a third support wall, the third support wall is connected between the second support wall and the second longitudinal cavity wall, and / or the third support wall is connected between the second support wall and the third longitudinal cavity wall.

[0021] By providing the third supporting wall, the structural strength and supporting stability of the second beam body can be further improved.

[0022] In some embodiments, the third support wall is inclined to the second support wall and / or the second longitudinal cavity wall; and / or, along the direction from the third longitudinal cavity wall to the second longitudinal cavity wall, the cross-sectional shape of the third support wall is wavy.

[0023] Through the above structure, the third supporting wall can not only play a supporting role, but also collapse and deform when the box body is impacted by external force, thereby further improving the energy absorption effect.

[0024] In some embodiments, the angle between the third support wall and the second support wall and / or the second longitudinal cavity wall is 30° to 60°.

[0025] In a second aspect, the present application also provides an electrical device, comprising the battery device as described above.

[0026] In the above-mentioned battery device and electrical equipment, the bottom plate and each frame together enclose a storage space. When the battery cell is placed in the storage space, the box body can protect the battery cell. At the same time, at least part of the cavity wall of the first cavity is bent and protruded in the direction away from the storage space. That is, when hit by external force, since the cavity wall of the first cavity protrudes in the direction of the force, the cavity wall of the first cavity can effectively absorb energy, reduce the probability of the overall displacement of the frame and thus compressing the battery cell inside the box body, and can better protect the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of a battery device according to one or more embodiments.

[0028] Figure 2 FIG. 4 is a schematic diagram of the structure of a frame in a battery device according to one or more embodiments.

[0029] Figure 3 FIG. 4 is a schematic diagram of the structure of a frame in a battery device according to one or more embodiments.

[0030] Explanation of the accompanying drawings: 100, battery device; 10, box body; 20, battery cell; 11, bottom plate; 12, frame; 13, accommodating space; 14, first beam body; 15, second beam body; 141, first longitudinal cavity wall; 142, second longitudinal cavity wall; 143, first transverse cavity wall; 144, second transverse cavity wall; 145, first cavity; 146, first supporting wall; 151, third transverse cavity wall; 152, fourth transverse cavity wall; 153, third longitudinal cavity wall; 154, second cavity; 155, second supporting wall; 156, third supporting wall. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0037] At present, from the perspective of market development, 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 and other fields. With the continuous expansion of the application field of battery devices, the market demand is also constantly expanding.

[0038] A battery cell is the smallest unit that makes up a battery device, and is usually composed of one or more battery cells arranged in a box to form a battery device. On the one hand, the box can provide a space for the battery cells, and on the other hand, the box can also play a certain protective role for the battery cells.

[0039] During production or use, the battery device needs to be transported or moved with the power-consuming equipment, that is, the use scenarios of the battery device are very diverse and complex. Therefore, the battery device is easily impacted or collided by external forces.

[0040] In order to better protect the battery cells, the current box frame is usually provided with transverse and longitudinal ribs to increase the rigidity of the frame, so that the overall structure of the box is more stable.

[0041] However, after the rigidity of the frame is improved, when the box is hit by external force, the frame is easy to shift as a whole, causing the frame to compress or squeeze the battery cells in the box, causing damage to the structure of the battery cells. Based on this, it is necessary to provide a box structure that can take into account both rigidity and energy absorption effects, so as to better protect the battery cells.

[0042] Based on the above considerations, in order to solve the problem that when the battery device is hit by an external force, the frame is easy to compress the battery cells inside the box and affect the overall structure of the battery, one or more embodiments of the present application provide a battery device, in which the bottom plate and the frames are together enclosed to form a storage space. When the battery cell is placed in the storage space, the box can protect the battery cell. At the same time, at least part of the cavity wall of the first cavity is bent and protruded in the direction away from the storage space, that is, when hit by an external force, since the cavity wall of the first cavity is protruding in the direction of the force, the cavity wall of the first cavity can effectively absorb energy, reduce the probability of the overall displacement of the frame and thus compressing the battery cell inside the box, and can better protect the battery cell.

[0043] It should be noted that 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.

[0044] 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, which 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] See also Figure 1 and Figure 2 An embodiment of the present application provides a battery device 100, including a box body 10 and a battery cell 20. The box body 10 includes a bottom plate 11 and a plurality of frames 12 arranged around the bottom plate 11. The frames 12 and the bottom plate 11 are together formed to form a receiving space 13 for receiving the battery cell 20. The frame 12 has a first cavity 145, and at least a portion of the cavity wall of the first cavity 145 is bent and protruded in a direction away from the receiving space 13.

[0049] It should be noted that the box 10 refers to a structure that can provide installation space for the battery cell 20 or other functional components in the battery device 100 and can protect them to a certain extent. The box 10 can include a box body and a cover body. The box body includes a bottom plate 11 and a plurality of frames 12 arranged around the periphery of the bottom plate 11. The other end opposite to the bottom plate 11 forms an opening. The cover body is arranged at the opening, so that the battery cell 20 or other functional components can be arranged in the accommodation space 13.

[0050] The bottom plate 11 is usually set to be rectangular, and the frame 12 can be set to four, and respectively arranged around the four edges of the bottom plate 11. Of course, the shape of the bottom plate 11 and the number of the frame 12 can also be adjusted accordingly according to actual use, which will not be repeated here.

[0051] Since the frame 12 is usually made of metal, and the outer shell of the battery cell 20 is also made of metal, in order to avoid contact short circuit between the battery cell 20 and the frame 12, an insulating member is usually provided outside the battery cell 20 to isolate the battery cell 20 from the frame 12.

[0052] The bottom plate 11 can be configured as a water cooling plate. The battery cells 20 generally include a plurality of battery cells 20, and all battery cells 20 are arranged in a matrix in the accommodation space 13 and supported on the water cooling plate. Thus, the water cooling plate contacts each battery cell 20 and can cool the battery cell 20.

[0053] Furthermore, the battery cell 20 will expand and deform during the cycle use process. Based on this, an expansion beam can be set in the accommodating space 13. Two expansion beams are set and are respectively set at the opposite ends of all the battery cells 20, so that the battery cell 20 can abut against the expansion beam. Therefore, the expansion beam can form a good constraint on the expansion deformation of the battery cell 20.

[0054] In addition, at least part of the cavity wall of the first cavity 145 is bent and protruded in a direction away from the accommodation space 13. Specifically, one cavity wall of the first cavity 145 may be bent and protruded in a direction away from the accommodation space 13, or two or all cavity walls may be bent and protruded in a direction away from the accommodation space 13.

[0055] Therefore, when the battery device 100 is impacted by external force, the cavity wall of the first cavity 145 is convexly arranged in the direction of the force, which can form a good energy absorption effect, not only maintaining good rigidity, but also effectively absorbing energy, better protecting the battery cells 20 in the accommodating space 13, and providing stability to the overall structure of the battery device 100.

[0056] In some embodiments, the frame 12 includes a first beam body 14, the first beam body 14 includes a first longitudinal cavity wall 141 and a second longitudinal cavity wall 142 located on the side of the first cavity 145 away from the accommodating space 13, a first cavity 145 is formed between the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142, and at least one of the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142 is bent and protruded in a direction away from the accommodating space 13.

[0057] Specifically, the first beam body 14 refers to a part of the beam structure in the frame 12. The first beam body 14 in the frame 12 can be arranged around the periphery of the bottom plate 11, and define the accommodation space 13 together with the bottom plate 11. The first beam body 14 includes a first longitudinal cavity wall 141 and a second longitudinal cavity wall 142, wherein the first longitudinal cavity wall 141 is arranged facing the accommodation space 13, and the second longitudinal cavity wall 142 is arranged facing away from the accommodation space 13, and the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142 are arranged at a distance from each other, and a first cavity 145 is formed between the two.

[0058] The bending and protruding arrangement in the direction away from the accommodation space 13 specifically refers to that the first longitudinal cavity wall 141 or the second longitudinal cavity wall 142 is bent in the direction away from the accommodation space 13 to form a convex arc surface. At least one of the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142 is bent and protruded in the direction away from the accommodation space 13, which includes at least the following three embodiments:

[0059] First, the first longitudinal cavity wall 141 is bent and protruded in a direction away from the accommodation space 13. When the box body 10 is subjected to external force, the first longitudinal cavity wall 141 can absorb energy and protect the battery cell 20.

[0060] Secondly, the second longitudinal cavity wall 142 is bent and protruded in a direction away from the accommodating space 13. When the box body 10 is subjected to external force, the second longitudinal cavity wall 142 can absorb energy and protect the battery cell 20.

[0061] Third, the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142 are bent and protruded in the direction away from the accommodating space 13 at the same time. When the box body 10 is subjected to external force, the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142 can simultaneously absorb energy, which can further improve the protection effect on the battery cell 20.

[0062] In addition, the bending angles of the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142 can be the same or different, and can be adjusted accordingly according to actual usage so that the structure of the box body 10 can better adapt to the actual usage scenario, which will not be elaborated here.

[0063] Through the above structure, the energy absorption effect of the frame 12 can be effectively improved on the basis of ensuring the overall rigidity of the frame 12 , thereby providing better protection for the battery cells 20 .

[0064] In some embodiments, the first beam body 14 further includes a first transverse cavity wall 143 and a second transverse cavity wall 144 connected between the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142. The first longitudinal cavity wall 141, the second longitudinal cavity wall 142, the first transverse cavity wall 143 and the second transverse cavity wall 144 together enclose a first cavity 145. The first beam body 14 further includes a first supporting wall 146 disposed in the first cavity 145 and connected between the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142.

[0065] Specifically, the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142 are spaced apart from each other, and the first transverse cavity wall 143 and the second transverse cavity wall 144 are respectively connected between the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142 to enclose a first cavity 145 of a quadrilateral structure.

[0066] The first supporting wall 146 is provided in the first cavity 145 , so as to further improve the overall structural strength of the first cavity 145 and make the structure of the first beam body 14 more stable.

[0067] like Figure 2 and Figure 3 As shown, in some embodiments, the first support wall 146 is inclined to the first longitudinal cavity wall 141 and / or the second longitudinal cavity wall 142. And / or, along the direction from the first longitudinal cavity wall 141 to the second longitudinal cavity wall 142, the cross-sectional shape of the first support wall 146 is wavy.

[0068] Specifically, the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142 are vertically arranged. When the first support wall 146 is connected between the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142, the first support wall 146 can be inclined to the horizontal plane, that is, the first support wall 146 is inclined to the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142, respectively.

[0069] In this way, the first support wall 146 can not only provide support, but also collapse and deform when the box body 10 is impacted by an external force, thereby further absorbing the energy of the collision and protecting the battery cell 20 .

[0070] Furthermore, along the direction from the first longitudinal cavity wall 141 to the second longitudinal cavity wall 142, that is, along the horizontal direction, the cross-sectional shape of the first support wall 146 can also be set to be wavy. In this way, the first support wall 146 can collapse and deform under the action of external force while supporting, further playing an energy absorbing role.

[0071] Through the above structure, the first support wall 146 can not only play a supporting role between the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142 to improve the structural stability of the first beam body 14, but also can collapse and deform when the box body 10 is impacted by external force, further improving the energy absorption effect.

[0072] In addition, the number of the first support walls 146 can be one or more, and they are spaced apart from each other in the first cavity 145, so that the structural stability and energy absorption effect of the first beam 14 can be further improved. Of course, the specific number of the first support walls 146 can be adjusted according to actual conditions, which will not be described in detail here.

[0073] In some embodiments, the angle between the first support wall 146 and the first longitudinal cavity wall 141 and / or the second longitudinal cavity wall 142 is 30° to 60°. In other words, the angle between the first support wall 146 and the horizontal direction is between 30° and 60°, thereby enabling the first support wall 146 to better absorb energy.

[0074] In some embodiments, the frame 12 further includes a second beam body 15, the second beam body 15 includes a third transverse cavity wall 151, a fourth transverse cavity wall 152 and a third longitudinal cavity wall 153, the third transverse cavity wall 151 and the fourth transverse cavity wall 152 are parallel to each other and one end of each is connected to the second longitudinal cavity wall 142, the third longitudinal cavity wall 153 is connected between the third transverse cavity wall 151 and the fourth transverse cavity wall 152, and is located at one end of the third transverse cavity wall 151 and the fourth transverse cavity wall 152 away from the second longitudinal cavity wall 142. The third longitudinal cavity wall 153 is bent and protruded in a direction away from the accommodating space 13.

[0075] Specifically, the first beam body 14 is vertically arranged, and the second beam body 15 intersects with the first beam body 14, that is, the second beam body 15 is horizontally arranged. In this way, the first beam body 14 and the second beam body 15 can jointly form a better supporting effect.

[0076] The second beam body 15 includes a third transverse cavity wall 151, a fourth transverse cavity wall 152 and a third longitudinal cavity wall 153, wherein the third transverse cavity wall 151 and the fourth transverse cavity wall 152 are parallel to each other and arranged at intervals, one end of the third transverse cavity wall 151 and the fourth transverse cavity wall 152 are connected to the second longitudinal cavity wall 142, and the third longitudinal cavity wall 153 is connected between the other ends of the third transverse cavity wall 151 and the fourth transverse cavity wall 152.

[0077] Among them, the third longitudinal cavity wall 153 is bent and protruded in the direction away from the accommodating space 13. In this way, the third longitudinal cavity wall 153 can form an energy absorption effect with the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142 respectively, which can further improve the overall energy absorption effect of the frame 12 and improve the protection of the battery cell 20.

[0078] Furthermore, the bending angle of the third longitudinal cavity wall 153 can be the same as that of the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142, or different from that of the first longitudinal cavity wall 141 and the second longitudinal cavity wall 142. It can be adjusted accordingly according to the actual application scenario, which will not be elaborated here.

[0079] In some embodiments, the third transverse cavity wall 151, the fourth transverse cavity wall 152 and the third longitudinal cavity wall 153 are enclosed together to form a second cavity 154, and the second beam body 15 further includes a second support wall 155 disposed in the second cavity 154 and connected between the third transverse cavity wall 151 and the fourth transverse cavity wall 152. The second support wall 155 is bent and protruded in a direction away from the accommodating space 13.

[0080] Specifically, the third transverse cavity wall 151, the fourth transverse cavity wall 152, the third longitudinal cavity wall 153 and the second longitudinal cavity wall 142 are enclosed together to form a second cavity 154, and a second supporting wall 155 is further disposed in the second cavity 154, and the second supporting wall 155 is connected between the third transverse cavity wall 151 and the fourth transverse cavity wall 152. That is, the second supporting wall 155 is vertically disposed in the second cavity 154.

[0081] Among them, the second support wall 155 is bent and protruded in the direction away from the accommodating space 13. In this way, the second support wall 155 can form an energy absorption effect together with the first longitudinal cavity wall 141, the second longitudinal cavity wall 142 and the third longitudinal cavity wall 153, further improving the overall energy absorption effect of the frame 12 and improving the protection of the battery cell 20.

[0082] In addition, the bending angle of the second support wall 155 can be the same as that of the first longitudinal cavity wall 141, the second longitudinal cavity wall 142 and the third longitudinal cavity wall 153, or it can be different from the first longitudinal cavity wall 141, the second longitudinal cavity wall 142 and the third longitudinal cavity wall 153. It can be adjusted accordingly according to the actual application scenario, which will not be elaborated here.

[0083] In some embodiments, the ratio of the protruding depth D1 of the first longitudinal cavity wall 141 and / or the second longitudinal cavity wall 142 to the width L1 of the first transverse cavity wall 143 or the second transverse cavity wall 144 is less than 50%. And / or, the ratio of the protruding depth D2 of the third longitudinal cavity wall 153 and / or the second support wall 155 to the width L2 of a section of the third transverse cavity wall 151 or the fourth transverse cavity wall 152 between the third longitudinal cavity wall 153 and the second support wall 155 is less than 50%.

[0084] Specifically, the protrusion depth can reflect the bending angles of the first longitudinal cavity wall 141, the second longitudinal cavity wall 142, the third longitudinal cavity wall 153 and the second support wall 155. The protrusion depth of one of the first longitudinal cavity wall 141, the second longitudinal cavity wall 142, the third longitudinal cavity wall 153 and the second support wall 155 can be set to the above-mentioned range, or the protrusion depths of more than one or all of them can be set to the above-mentioned range.

[0085] The protrusion depth will affect the actual size of the frame 12 , thereby affecting the overall volume of the box 10 and the battery device 100 . Meanwhile, the protrusion depth will also directly affect the energy absorption effect of the frame 12 .

[0086] Based on this, setting the protruding depth of the first longitudinal cavity wall 141 and / or the second longitudinal cavity wall 142 and / or the third longitudinal cavity wall 153 and / or the second support wall 155 to the above range can minimize the overall volume of the box 10 and the battery device 100 while improving the energy absorption effect of the frame 12.

[0087] In some embodiments, the second beam body 15 further includes a third support wall 156 , which is connected between the second support wall 155 and the second longitudinal cavity wall 142 , and / or between the second support wall 155 and the third longitudinal cavity wall 153 .

[0088] Specifically, the third support wall 156 can be connected between the second support wall 155 and the second longitudinal cavity wall 142, or can be connected between the second support wall 155 and the third longitudinal cavity wall 153. In this way, the third support wall 156 can form a good support effect between the second support wall 155 and the second longitudinal cavity wall 142 or the second support wall 155 and the third longitudinal cavity wall 153.

[0089] By providing the third supporting wall 156 , the structural strength and supporting stability of the second beam body 15 can be further improved.

[0090] In some embodiments, the third support wall 156 is inclined to the second support wall 155 and / or the second longitudinal cavity wall 142. And / or, along the direction from the third longitudinal cavity wall 153 to the second longitudinal cavity wall 142, the cross-section of the third support wall 156 is wavy.

[0091] Specifically, the third support wall 156 is horizontally disposed and is respectively inclined with the second support wall 155 and the second longitudinal cavity wall 142. Thus, the third support wall 156 can not only provide support but also collapse and deform when the box body 10 is impacted by external force, thereby further absorbing the energy of the collision and protecting the battery cell 20.

[0092] Furthermore, along the backwash of the third longitudinal cavity wall 153 toward the second longitudinal cavity wall 142, that is, along the horizontal direction, the cross-sectional shape of the third support wall 156 can also be set to be wavy. In this way, the third support wall 156 can collapse and deform under the action of external force while supporting, further playing an energy absorbing role.

[0093] Through the above structure, the third support wall 156 can not only play a supporting role, but also collapse and deform when the box body 10 is impacted by external force, thereby further improving the energy absorption effect.

[0094] In some embodiments, the angle between the third support wall 156 and the second support wall 155 and / or the second longitudinal cavity wall 142 is 30° to 60°. In other words, the angle between the third support wall 156 and the horizontal direction is between 30° and 60°, thereby enabling the third support wall 156 to better absorb energy.

[0095] Based on the same concept as the above-mentioned battery device 100 , the present application also provides an electrical device, including the above-mentioned battery device 100 .

[0096] According to one or more embodiments, the bottom plate 11 and the frames 12 are enclosed together to form a receiving space 13, and a plurality of battery cells 20 are arranged in a matrix in the receiving space 13. The first longitudinal cavity wall 141, the second longitudinal cavity wall 142, the third longitudinal cavity wall 153 and the second support wall 155 are all bent and protruded outwards. When the battery device 100 is impacted by an external force, the first longitudinal cavity wall 141, the second longitudinal cavity wall 142, the third longitudinal cavity wall 153 and the second support wall 155 can absorb the impact energy respectively, improve the energy absorption effect, and play a good protective role for the battery cells 20.

[0097] At the same time, the first support wall 146 and the third support wall 156 are respectively arranged in the first cavity 145 and the second cavity 154. The first support wall 146 and the third support wall 156 are arranged at an angle or in a wave shape, which can collapse and deform during the collision process, effectively absorb the energy of the collision, and further improve the energy absorption effect.

[0098] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0099] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery device, characterized in that: The box comprises a box body and a battery cell, wherein the box body comprises a bottom plate and a plurality of frames arranged around the outer periphery of the bottom plate, and each of the frames and the bottom plate are enclosed together to form a storage space for storing the battery cell; The frame has a first cavity, and at least a portion of the cavity wall of the first cavity is bent and protruded in a direction away from the accommodating space.

2. The battery device according to claim 1, characterized in that: The frame includes a first beam body, the first beam body includes a first longitudinal cavity wall and a second longitudinal cavity wall located on the side of the first cavity away from the accommodating space, the first cavity is formed between the first longitudinal cavity wall and the second longitudinal cavity wall, and at least one of the first longitudinal cavity wall and the second longitudinal cavity wall is bent and protruded in a direction away from the accommodating space.

3. The battery device according to claim 2, characterized in that: The first beam body further includes a first transverse cavity wall and a second transverse cavity wall connected between the first longitudinal cavity wall and the second longitudinal cavity wall, and the first longitudinal cavity wall, the second longitudinal cavity wall, the first transverse cavity wall and the second transverse cavity wall together enclose the first cavity; The first beam body also includes a first supporting wall disposed in the first cavity and connected between the first longitudinal cavity wall and the second longitudinal cavity wall.

4. The battery device according to claim 3, characterized in that: The first supporting wall is inclined to the first longitudinal cavity wall and / or the second longitudinal cavity wall; and / or, along the direction from the first longitudinal cavity wall to the second longitudinal cavity wall, the cross-section of the first supporting wall is wavy.

5. The battery device according to claim 4, characterized in that: An included angle between the first supporting wall and the first longitudinal cavity wall and / or the second longitudinal cavity wall is 30° to 60°.

6. The battery device according to claim 3, characterized in that: The frame also includes a second beam body, the second beam body includes a third transverse cavity wall, a fourth transverse cavity wall and a third longitudinal cavity wall, the third transverse cavity wall and the fourth transverse cavity wall are parallel to each other and one end of each is connected to the second longitudinal cavity wall, the third longitudinal cavity wall is connected between the third transverse cavity wall and the fourth transverse cavity wall, and is located at one end of the third transverse cavity wall and the fourth transverse cavity wall away from the second longitudinal cavity wall; Wherein, the third longitudinal cavity wall is bent and protruded in a direction away from the accommodating space.

7. The battery device according to claim 6, characterized in that: The third transverse cavity wall, the fourth transverse cavity wall and the third longitudinal cavity wall together enclose a second cavity, and the second beam body further includes a second supporting wall disposed in the second cavity and connected between the third transverse cavity wall and the fourth transverse cavity wall; The second supporting wall is bent and protrudes in a direction away from the accommodating space.

8. The battery device according to claim 7, characterized in that: The ratio between the protrusion depth of the first longitudinal cavity wall and / or the second longitudinal cavity wall and the width of the first transverse cavity wall or the second transverse cavity wall is less than 50%; And / or, the ratio between the protruding depth of the third longitudinal cavity wall and / or the second supporting wall and the width of a section of the third transverse cavity wall or the fourth transverse cavity wall between the third longitudinal cavity wall and the second supporting wall is less than 50%.

9. The battery device according to claim 7, characterized in that: The second beam body further includes a third supporting wall, wherein the third supporting wall is connected between the second supporting wall and the second longitudinal cavity wall, and / or the third supporting wall is connected between the second supporting wall and the third longitudinal cavity wall.

10. The battery device according to claim 9, characterized in that: The third supporting wall is inclined to the second supporting wall and / or the second longitudinal cavity wall; and / or, along the direction from the third longitudinal cavity wall to the second longitudinal cavity wall, the cross-sectional shape of the third supporting wall is wavy.

11. The battery device according to claim 10, characterized in that: The included angle between the third supporting wall and the second supporting wall and / or the second longitudinal cavity wall is 30° to 60°.

12. An electrical equipment, characterized in that: Comprising the battery device according to any one of claims 1-11.

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