Battery device and electric appliance having the same

Abstract

The application discloses a battery device and an electric equipment with the same, and relates to the technical field of batteries. The battery device comprises a battery frame, wherein the battery frame is provided with a containing cavity; a plurality of protection members, wherein the plurality of protection members at least comprise a first protection member and a second protection member, the first protection member is located at least one side of the battery frame in a first direction, and the second protection member is connected to at least one side of the first protection member in the first direction; and wherein the second protection member is provided with at least one cavity, and at least part of the first protection member is movable to buffer the impact force in the first direction. According to the battery device provided by the embodiment of the application, the cavity of the second protection member can be collapsed to buffer the impact force, and at least part of the first protection member is movable to buffer the impact force, so that the impact force transmitted to the battery frame and the battery pack can be sufficiently reduced, the battery pack is protected, the possibility of deformation and thermal runaway of the battery pack is reduced, and the safety of the battery pack is improved.

Description

TECHNICAL FIELD

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

[0002] In the related art, a battery, in particular a lithium ion battery, is prone to risks such as short circuit, liquid leakage, thermal runaway and even fire and explosion under conditions such as mechanical impact, extrusion and overheating. When a vehicle is involved in a collision accident, the battery in the vehicle is at risk of fire and explosion. Therefore, the protection of the battery directly determines the safety of the vehicle and the passengers. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a battery device. The cavity of the second protective member can collapse to buffer the impact force, and at least part of the first protective member can move to buffer the impact force. The first protective member and the second protective member can fully buffer the impact force, thereby fully reducing the impact force transmitted to the battery frame and the battery pack, protecting the battery pack, reducing the possibility of deformation and thermal runaway of the battery pack, and facilitating the improvement of the safety of the battery pack.

[0004] The present application also provides an electric equipment with the battery device.

[0005] According to the battery device of the first aspect of the present application, the battery device comprises a battery frame having a receiving cavity for placing a battery pack, and a plurality of protective members including at least a first protective member located on at least one side of the battery frame in a first direction and a second protective member connected to at least one side of the first protective member in the first direction, wherein the second protective member is provided with at least one cavity, and at least part of the first protective member is movable to buffer the impact force in the first direction.

[0006] According to the battery device of the present application, the cavity of the second protective member can collapse to buffer the impact force, and at least part of the first protective member can move to buffer the impact force. The first protective member and the second protective member can fully buffer the impact force, thereby fully reducing the impact force transmitted to the battery frame and the battery pack, protecting the battery pack, reducing the possibility of deformation and thermal runaway of the battery pack, and facilitating the improvement of the safety of the battery pack.

[0007] In addition, the battery device according to the above-mentioned embodiments of the present application can also have the following additional technical features:

[0008] According to some embodiments of the present application, the second protection member and the battery frame are located on two sides of the first protection member in the first direction, the first protection member comprises a first protection beam and a second protection beam arranged in a sleeving manner, the first protection beam is connected to the battery frame, the second protection beam is connected to the second protection member, and the first protection beam and the second protection beam are configured to be relatively movable in the first direction to buffer the impact force.

[0009] According to some embodiments of the present application, the first protection member further comprises a deformable buffer member located on a side of the first protection member in the first direction facing the battery frame, and the buffer member is connected to the battery frame and the second protection beam respectively.

[0010] According to some optional embodiments of the present application, the buffer member comprises a plurality of spring members arranged in an interval manner, and each of the spring members is connected to the second protection beam and the battery frame respectively.

[0011] According to some specific embodiments of the present application, the buffer member further comprises a fixing portion and a stop portion, the fixing portion is connected to the battery frame, the fixing portion has a plurality of conduits extending in the first direction, a plurality of the spring members are sleeved on the plurality of conduits, and the stop portion has a first avoiding hole avoiding the conduits; the stop portion cooperates with the second protection beam so that the stop portion is movable relative to the conduits, the stop portion cooperates with an end of the spring member away from the fixing portion to push the spring member to deform.

[0012] According to some optional embodiments of the present application, the battery device further comprises a connecting beam connecting the battery frame and the first protection member, the connecting beam has a first connecting portion, the first protection beam has a second connecting portion cooperating with the first connecting portion, the connecting beam defines a placing cavity, and the second protection beam or the buffer member is located in the placing cavity.

[0013] According to some embodiments of the present application, the first protection member is a plurality of, and the same side of the battery frame is provided with a plurality of the first protection members arranged in a second direction; the battery device further comprises a buffer connecting member connecting a plurality of the second protection beams, the second direction intersects with the first direction; and / or, the battery frame comprises a frame portion and a bottom portion, the bottom portion comprises a bottom plate and a bottom protection plate arranged in a stacking manner, the battery pack is adapted to be supported on the bottom plate, and a side of the bottom protection plate away from the bottom plate is provided with a plurality of reinforcing plates arranged in the first direction.

[0014] According to some optional embodiments of the present application, the same side of the battery frame is provided with a plurality of the first protection members arranged along a second direction; the battery device further comprises a buffer connecting member connecting a plurality of the second protection beams, the second direction intersecting the first direction, wherein the buffer connecting member comprises a plurality of first buffer ropes arranged along a third direction, the first buffer ropes extending along the second direction, each of the first buffer ropes connecting a plurality of the second protection beams arranged along the second direction, the buffer connecting member further comprises at least one second buffer rope extending along the third direction, the second buffer rope being wound around a plurality of the first buffer ropes, the third direction, the second direction and the first direction being perpendicular to each other.

[0015] According to some specific embodiments of the present application, the second protection beam is provided with a mounting seat having a plurality of connecting rings arranged along the third direction on the mounting seat, a plurality of the first buffer ropes being fixed to the connecting rings, wherein the mounting seat is provided with a reinforcing portion connected to the connecting rings, the reinforcing portion comprising a plurality of first reinforcing ribs arranged along the third direction, the first reinforcing ribs extending along the first direction, and at least one second reinforcing rib extending along the third direction and intersecting the plurality of the first reinforcing ribs, each of the connecting rings being arranged at the connection between the first reinforcing rib and the second reinforcing rib; and / or, the first protection beam is sleeved on the second protection beam, the second protection beam has a guide protrusion, the first protection beam has a guide rail penetrating through the wall thickness thereof, the guide rail extending along the first direction, the guide protrusion being adapted to extend into the guide rail and slide-fitting with the guide rail, the mounting seat being connected to the guide protrusion.

[0016] According to some embodiments of the present application, the first protection member is a plurality of, the same side of the battery frame is provided with a plurality of the first protection members arranged along a second direction, the second direction intersecting the first direction; the end portions of the plurality of the first protection members on the same side of the battery frame away from the battery frame are connected by a second protection member.

[0017] According to some optional embodiments of the present application, the second protection beam has a limiting portion protruding outward, the limiting portion abuts against one end of the first protection beam away from the battery frame, and the second protection member is connected to the limiting portion; and / or, the second protection member comprises a first energy-absorbing beam and a second energy-absorbing beam fixedly connected in the first direction, the first energy-absorbing beam extends in the second direction, one end of the second protection beam away from the battery frame in the first direction is connected to the first energy-absorbing beam, the second energy-absorbing beam forms an arc-shaped beam protruding in a direction away from the first energy-absorbing beam, both ends of the second energy-absorbing beam in the second direction are connected to the first energy-absorbing beam, and the cavity comprises a first energy-absorbing cavity arranged in the first energy-absorbing beam and a second energy-absorbing cavity arranged in the second energy-absorbing beam.

[0018] According to some embodiments of the present application, the plurality of protection members further comprises a third protection member connected between the battery frame and the first protection member, and the third protection member defines a plurality of third energy-absorbing cavities, wherein the third protection member comprises a plurality of third reinforcing ribs arranged in a third direction and a plurality of connecting ribs connecting two adjacent third reinforcing ribs in the third direction, and the connecting ribs and the third reinforcing ribs define the plurality of third energy-absorbing cavities.

[0019] According to some optional embodiments of the present application, the battery frame comprises two first side beams arranged in a first direction and two second side beams arranged in a second direction, and two ends of the first side beams are respectively connected to end portions of the two second side beams to enclose the accommodating cavity, wherein the third protection member is connected to the first side beams.

[0020] According to some specific embodiments of the present application, the first side beams and the third protection member are integrally formed; and / or, the battery device further comprises a power distribution assembly, the first side beams have mounting cavities in communication with the inside of the battery frame, and the mounting cavities are used for mounting the power distribution assembly; and / or, the first side beams and the third protection member jointly define an exhaust passage in communication with the accommodating cavity, an explosion-proof valve that opens to exhaust under a set condition is arranged at an outlet of the exhaust passage, wherein an inlet of the exhaust passage is located at a first side wall of the first side beams, an outlet of the exhaust passage is located at a second side wall of the third protection member, the extension direction of the first side wall intersects with the extension direction of the second side wall; and / or, the bottom surface of the third protection member has a receiving recess recessed toward the exhaust passage, the receiving recess is in communication with the outlet, the explosion-proof valve is arranged in the receiving recess, and the explosion-proof valve does not exceed the bottom surface.

[0021] According to a second aspect of the embodiments of the present application, a battery device is provided.

[0022] According to the battery device of the embodiments of the present application, the cavity of the second protection member can be collapsed to buffer the impact force, at least part of the first protection member can be moved to buffer the impact force, the impact force can be sufficiently buffered by the first protection member and the second protection member, and the impact force transmitted to the battery frame and the battery pack can be sufficiently reduced, so as to protect the battery pack, reduce the possibility of deformation and thermal runaway of the battery pack, facilitate to improve the safety of the battery pack, and further facilitate to improve the safety of the electric device.

[0023] Additional aspects and advantages of the present application will be given, partially in the following description, partially become obvious from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0025] Figure 1 is a structural schematic diagram of a battery device according to an embodiment of the present application;

[0026] Figure 2 is a bottom view of the battery device according to an embodiment of the present application;

[0027] Figure 3 is a partial structural exploded view of the battery device according to an embodiment of the present application;

[0028] Figure 4 is a structural exploded view of the first protection member according to an embodiment of the present application;

[0029] Figure 5 is a structural schematic diagram of a buffer member according to an embodiment of the present application;

[0030] Figure 6 is a structural exploded view of the buffer member according to an embodiment of the present application;

[0031] Figure 7 is a structural schematic diagram of a second protection beam according to an embodiment of the present application;

[0032] Figure 8 is a structural schematic diagram of a buffer connecting member and a mounting seat according to an embodiment of the present application;

[0033] Figure 9 is Figure 8 is a structural enlarged view of part of the area in

[0034] Figure 10 is a structural schematic view of a second protective member according to an embodiment of the present application;

[0035] Figure 11 is a structural schematic view of a battery frame, a third protective member and a connecting beam according to an embodiment of the present application;

[0036] Figure 12 is a bottom view of a battery frame, a third protective member and a connecting beam according to an embodiment of the present application;

[0037] Figure 13 is a partial enlarged view of a sectional view at A-A in FIG. 8; Figure 12

[0038] Figure 14 is a partial enlarged view of a sectional view at B-B in FIG. 8; Figure 12

[0039] Figure 15 is a structural schematic view of a third protective member and a connecting beam according to an embodiment of the present application;

[0040] Figure 16 is a bottom view of a third protective member and a connecting beam according to an embodiment of the present application;

[0041] Figure 17 is a sectional view at C-C in FIG. 9; Figure 16

[0042] Figure 18 is a structural schematic view of an explosion-proof valve mounting portion according to an embodiment of the present application.

[0043] Reference numerals: 1, battery device; 100, battery frame; 101, first side beam; 102, second side beam; 1021, mounting cavity; 103, reinforcing plate; 104, middle cross beam;

[0044] 10, first protective member;

[0045] 11, first protective beam; 111, guide rail; 112, second connecting portion;

[0046] 12, second protective beam; 121, guide protrusion; 122, first stop matching portion; 123, limiting portion; 124, second avoiding hole; 125, first connecting hole;

[0047] 13, buffer member; 131, spring; 132, fixing portion; 1321, guide pipe; 1322, third connecting hole; 133, stop portion; 1331, first avoiding hole;

[0048] 14, mounting seat; 141, connecting ring; 1421, first reinforcing rib; 1422, second reinforcing rib; ​​​

[0049] 20. Second protective component; 201. Cavity; 21. First energy-absorbing beam; 211. First energy-absorbing cavity; 22. Second energy-absorbing beam; 221. Second energy-absorbing cavity; 23. Buffer cavity; 24. Separating rib;

[0050] 30. Third protective component; 301. Third energy-absorbing cavity; 31. Third reinforcing rib; 32. Connecting rib;

[0051] 40. Buffer connector; 41. First buffer rope; 42. Second buffer rope;

[0052] 50. Connecting beam; 501. Placement cavity; 51. First connecting part; 52. Fourth connecting hole;

[0053] 61. Exhaust passage; 611. Inlet; 612. Outlet; 62. Explosion-proof valve; 63. Explosion-proof valve mounting part; 631. Reinforcing protrusion; 64. Receiving recess; 7. Battery pack. Detailed Implementation

[0054] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0055] The battery device 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0056] like Figures 1-4 As shown, the battery device 1 according to an embodiment of the present invention includes a battery frame 100 and a plurality of protective components.

[0057] The battery frame 100 has a receiving cavity for housing the battery pack 7. A plurality of protective members include at least a first protective member 10 and a second protective member 20, the first protective member 10 being located on at least one side of the battery frame 100 in a first direction, and the second protective member 20 being connected to the first protective member 10 on at least one side of the first protective member 10 in the first direction.

[0058] Specifically, the second protective member 20 can be connected to the side of the first protective member 10 facing away from the battery frame 100 in the first direction, or the second protective member 20 can be connected between the first protective member 10 and the battery frame 100. Of course, other protective members can also be provided between the battery frame 100 and the first protective member 10, and other protective members can also be provided between the second protective member 20 and the first protective member 10. These other protective members have collapsible chambers or buffers to further buffer the impact force; no further restrictions are imposed here.

[0059] The second protection member 20 is provided with at least one cavity 201, and at least part of the first protection member 10 is movable to buffer the impact force in the first direction. When the battery device 1 is impacted by an impact force, the impact force is transmitted to the second protection member 20, and the cavity 201 of the second protection member 20 is adapted to collapse to buffer the impact force. When the impact force is transmitted to the first protection member 10, at least part of the first protection member 10 is movable to buffer the impact force. The first protection member 10 and the second protection member 20 can sufficiently buffer the impact force, thereby sufficiently reducing the impact force transmitted to the battery frame and the battery pack, protecting the battery pack, reducing the possibility of deformation and thermal runaway of the battery pack, and facilitating the safety of the battery pack.

[0060] It can be understood that the battery device 1 can be a battery housing for placing the battery pack 7; or the battery device 1 includes the battery pack 7, and the battery device 1 is a separate battery pack for powering various electrical equipment; or the battery device 1 is at least part of a vehicle chassis, so that the battery pack 7 can be directly integrated into the vehicle chassis to form a CTC battery structure.

[0061] Therefore, according to the battery device 1 of the embodiment of the present application, the cavity 201 of the second protection member 20 can collapse to buffer the impact force, and at least part of the first protection member 10 is movable to buffer the impact force. The first protection member 10 and the second protection member 20 can sufficiently buffer the impact force, thereby sufficiently reducing the impact force transmitted to the battery frame 100 and the battery pack 7, protecting the battery pack 7, reducing the possibility of deformation and thermal runaway of the battery pack 7, and facilitating the safety of the battery pack 7.

[0062] The battery device 1 according to the embodiments of the present application will be described below with reference to the accompanying drawings.

[0063] In some embodiments of the present application, as shown in Figures 1-4 The battery device 1 includes a battery frame 100 and a plurality of protection members.

[0064] In some embodiments of the present application, as shown in Figure 3 , Figure 4 The second protection member 20 and the battery frame 100 are located on both sides of the first protection member 10 in the first direction, the first protection member 10 includes a first protection beam 11 and a second protection beam 12 arranged in a sleeve, the first protection beam 11 is connected to the battery frame 100, the second protection beam 12 is connected to the second protection member 20, and the first protection beam 11 and the second protection beam 12 are configured to be relatively movable in the first direction to buffer the impact force, thereby reducing the impact force transmitted by the first protection member 10 to the battery frame 100 and reducing the impact force received by the battery pack 7 to protect the battery pack 7 in the battery frame 100.

[0065] When the second protection member 20 in the battery device 1 is first impacted by the impact force, the cavity 201 of the second protection member 20 is adapted to collapse to perform a first-stage buffering of the impact force, and the second protection member 20 is adapted to transmit the impact force to the second protection beam 12, at which time the second protection beam 12 moves relative to the first protection beam 11 in the first direction to perform a second-stage buffering of the impact force.

[0066] Specifically, when the second protection beam 12 moves relative to the first protection beam 11 in the first direction, a friction force exists between the second protection beam 12 and the first protection beam 11, which can buffer the impact force received by the second protection beam 12, and meanwhile, the second protection beam 12 and the first protection beam 11 are adapted to deform when the impact force received reaches a certain value, at which time the second protection beam 12 and the first protection beam 11 can absorb part of the impact force to sufficiently reduce the impact force transmitted to the battery frame 100 and the battery pack 7, thereby protecting the battery pack 7 and reducing the possibility of deformation and thermal runaway of the battery pack 7, and facilitating the safety of the battery pack 7.

[0067] When the battery device 1 is applied to an electrical equipment, the electrical equipment is impacted, and the impact force is transmitted to the second protection beam 12, the second protection beam 12 can move relative to the first protection beam 11 in the first direction to buffer the impact force, thereby reducing the impact force transmitted to the battery frame 100 and the battery pack 7, and playing a protective role for the battery pack 7, thereby reducing the possibility of damage to the battery pack 7 and reducing the possibility of deformation and thermal runaway of the battery pack 7, and facilitating the safety of the battery pack 7.

[0068] In some embodiments of the present application, as shown in Figure 4 , Figure 5 The first protection member 10 further comprises a deformable buffer member 13 located on the side of the first protection member 10 in the first direction towards the battery frame 100, and the buffer member 13 is connected with the battery frame 100 and the second protection beam 12 respectively, when the second protection beam 12 moves relative to the first protection beam 11 in the first direction to approach the side of the battery frame 100 and abuts against the buffer member 13, the buffer member 13 is adapted to deform in the first direction to convert the impact force into compression energy of the buffer member 13, thereby absorbing part of the impact force and buffering the impact force received, so as to reduce the impact force transmitted by the second protection beam 12 to the battery frame 100, and thereby reducing the impact force received by the battery pack 7 to protect the battery pack 7 in the battery frame 100.

[0069] Specifically, when the second protection member 20 is subjected to an impact force, the impact force causes the second protection beam 12 to move relative to the first protection beam 11 in a direction close to the buffer member 13, and when the second protection beam 12 is in abutting engagement with the buffer member 13 and drives the buffer member 13 to deform, the buffer member 13 can buffer the impact force received thereby, thereby reducing the impact force transmitted to the battery frame 100 and reducing the impact force received by the battery pack 7, so as to protect the battery pack 7 in the battery frame 100.

[0070] Of course, when the second protection beam 12 and the first protection beam 11 are subjected to an impact force and are caused to deform, the connection between the first protection beam 11 and the battery frame 100 can fail, and the first protection beam 11 can also extrude the buffer member 13 after deforming. At this time, the second protection beam 12 and the first protection beam 11 are adapted to jointly extrude the buffer member 13, so that the buffer member 13 deforms.

[0071] In some optional embodiments of the present application, as shown in Figure 6 The buffer member 13 includes a plurality of spring members 131 arranged at intervals, and each spring member 131 is connected to the second protection beam 12 and the battery frame 100, respectively. When the second protection beam 12 moves relative to the first protection beam 11 in a direction close to the battery frame 100 and is in abutting engagement with the spring member 131, the spring member 131 is adapted to be compressed in the first direction, so as to convert part of the impact force into compression energy of the spring member 131, thereby buffering the impact force transmitted by the second protection member 20 to the battery frame 100.

[0072] Specifically, when the second protection beam 12 is subjected to an impact force and moves in a direction close to the buffer member 13, the impact force received by the second protection member 20 is adapted to be transmitted to the battery frame 100 through the buffer member 13. At this time, the second protection beam 12 extrudes the spring member 131, and when the spring member 131 is compressed in the first direction, it can convert part of the impact force into compression energy of the spring member 131, thereby buffering the impact force transmitted by the second protection beam 12, reducing the impact force transmitted to the battery frame 100, reducing the impact force received by the battery pack 7, facilitating the protection of the battery pack 7, reducing the possibility of deformation and thermal runaway of the battery pack 7, and facilitating the improvement of the safety of the battery pack 7.

[0073] Among them, by arranging a plurality of spring members 131, when the second protection member 20 is subjected to an impact force, the impact force transmitted by the second protection beam 12 to the battery frame 100 can be buffered by the plurality of spring members 131, so as to sufficiently reduce the impact force transmitted to the battery frame 100, thereby reducing the impact force transmitted to the battery pack 7, protecting the battery pack 7, reducing the possibility of deformation and thermal runaway of the battery pack 7, and facilitating the improvement of the safety of the battery pack 7.

[0074] In some embodiments of the present application, as shown in Figure 6 The buffer 13 includes a fixed portion 132 and an abutting portion 133. The fixed portion 132 is connected to the battery frame 100 and has a plurality of conduits 1321 extending in the first direction. The plurality of springs 131 are sleeved on the plurality of conduits 1321. The abutting portion 133 has a first avoiding hole 1331 avoiding the conduits 1321. The abutting portion 133 is matched with the second protection beam 12 so that the abutting portion 133 can move relative to the conduits 1321. The abutting portion 133 is matched with the end of the spring 131 away from the fixed portion 132 to push the spring 131 to deform. When the second protection beam 12 is impacted by an impact force and moves relative to the battery frame 100 in the first direction, the second protection beam 12 compresses the spring 131 by the abutting portion 133, and the spring 131 is deformed to buffer the impact force transmitted by the second protection beam 12 to the battery frame 100.

[0075] Specifically, when the second protection beam 12 abuts against the abutting portion 133 and drives the abutting portion 133 to compress the spring 131, the conduits 1321 are adapted to extend into the first avoiding hole 1331 so that the second protection beam 12 can move relative to the conduits 1321 in the first direction smoothly, avoiding interference between the conduits 1321, the second protection beam 12 and the abutting portion 133.

[0076] Here, it is to be explained that the size of the first avoiding hole 1331 on the abutting portion 133 is greater than the diameter of the conduit 1321 but less than the diameter of the spring 131, so that the abutting portion 133 can abut against and compress the spring 131 smoothly while the conduit 1321 can extend into the first avoiding hole 1331, and the spring 131 is used to buffer the impact force transmitted by the second protection beam 12 to the battery frame 100.

[0077] The fixed portion 132 can be directly connected to the battery frame 100 or indirectly connected to the battery frame 100. For example, a third protection member 30 is arranged between the first protection member 10 and the battery frame 100. When the third protection member 30 is fixed to the battery frame 100, the fixed portion 132 is adapted to be connected to the third protection member 30. Further, when a connecting beam 50 is arranged between the third protection member 30 and the first protection member 10, the fixed portion 132 is adapted to be connected to the connecting beam 50.

[0078] In some embodiments, as shown in Figure 7As shown, the second protection beam 12 has a first abutting part 122 on the side facing the buffer 13, the first abutting part 122 abuts with the abutting part 133, the first abutting part 122 has a second avoiding hole 124 opposite to the first avoiding hole 1331, when the second protection beam 12 drives the abutting part 133 to move through the first abutting part 122, the guide pipe 1321 extends into the first avoiding hole 1331 and the second avoiding hole 124, so that the second protection beam 12 can smoothly drive the abutting part 133 to move along the first direction relative to the fixed part 132, and at the same time, the spring 131 is compressed by the abutting part 133, so as to buffer the impact force transmitted to the battery frame 100 by the spring 131.

[0079] In some examples, the abutting part 133 and the first abutting part 122 both include a plurality of horizontal ribs and vertical ribs to define a plurality of square first avoiding holes 1331 and second avoiding holes 124, and the horizontal ribs and vertical ribs on the abutting part 133 and the first abutting part 122 are adapted to abut on the spring 131 to compress the spring 131.

[0080] In some optional embodiments of the present application, as shown in Figure 11 、 Figure 13 The battery device 1 further includes a connecting beam 50 connecting the battery frame 100 and the first protection 10, the connecting beam 50 has a first connecting part 51, the first protection beam 11 has a second connecting part 112 matched with the first connecting part 51, and the first protection beam 11 and the connecting beam 50 are connected together through the first connecting part 51 and the second connecting part 112.

[0081] The connecting beam 50 defines a placing cavity 501, the second protection beam 12 or the buffer 13 is located in the placing cavity 501, when the second protection beam 12 moves relative to the first protection beam 11 along the first direction, the second protection beam 12 is adapted to move towards the bottom wall of the placing cavity 501, thereby compressing the buffer 13, buffering the impact force transmitted to the connecting beam 50 by the buffer 13, and reducing the impact force transmitted to the third protection 30 and the battery pack 7.

[0082] In some embodiments, the first connecting part 51 and the second connecting part 112 are both connecting holes, the first connecting part 51 and the second connecting part 112 are opposite to each other, and the first fastener is adapted to pass through the first connecting part 51 and the second connecting part 112 to fixedly connect the first protection beam 11 and the connecting beam 50 together.

[0083] In some embodiments, the first protection beam 11 is sleeved on the connecting beam 50 at the end facing the battery frame 100, and the first fastener is adapted to be threadedly connected with the first connecting part 51 through the second connecting part 112.

[0084] In some embodiments, the buffer 13 is located in the placing cavity 501 and fixedly connected with the connecting beam 50, when the second protection beam 12 moves relative to the first protection beam 11 along the first direction, the second protection beam 12 is adapted to compress the buffer 13 in the placing cavity 501, so as to buffer the impact force suffered by the second protection beam 12 by the buffer 13, thereby reducing the impact force transmitted to the battery frame 100 and the battery pack 7, thereby achieving protection of the battery pack 7.

[0085] In some embodiments, as shown in Figure 5 、 Figure 13 The fixed part 132 is provided with a third connecting hole 1322, and the connecting beam 50 has a fourth connecting hole 52, the third connecting hole 1322 and the fourth connecting hole 52 are oppositely arranged, and the fastener is adapted to be screwed through the fourth connecting hole 52 and the third connecting hole 1322 to fix the fixed part 132 and the connecting beam 50 together, thereby fixing the buffer 13 in the placing cavity 501.

[0086] Further, as shown in Figure 4 、 Figure 11 In the first direction, the buffer 13 is located on the side of the first protection beam 11 facing the battery frame 100, so the fourth connecting hole 52 is located on the side of the first connecting part 51 facing the battery frame 100.

[0087] In some embodiments of the present application, the first protection member 10 further comprises a deformable buffer 13, the buffer 13 is located on the side of the first protection member 10 facing the second protection member 20 in the first direction, and the buffer 13 is connected with the second protection member 20 and the first protection beam 11 respectively, when the first protection beam 11 moves relative to the second protection beam 12 along the first direction to the side of the second protection member 20 and abuts against the buffer 13, the buffer 13 is adapted to deform along the first direction to convert the impact force into compression energy of the buffer 13, thereby absorbing part of the buffer force, and at the same time buffering the impact force, reducing the impact force transmitted to the battery frame 100 and the impact force suffered by the battery pack 7, thereby protecting the battery pack 7 in the battery frame 100.

[0088] Specifically, when the second protection member 20 is subjected to an impact force, the impact force causes the buffer 13 to move towards the first protection beam 11, and when the first protection beam 11 abuts against the buffer 13 and causes the buffer 13 to deform, the buffer 13 can buffer the impact force it receives, thereby reducing the impact force transmitted to the battery frame 100 and the impact force suffered by the battery pack 7, thereby protecting the battery pack 7 in the battery frame 100.

[0089] Of course, when the second protection beam 12 and the first protection beam 11 are subjected to the impact force and are deformed, the connection between the second protection beam 12 and the second protection member 20 can fail, and the deformed second protection beam 12 can be pressed to the buffer member 13. At this time, the second protection beam 12 and the first protection beam 11 are adapted to jointly press the buffer member 13, so that the buffer member 13 is deformed.

[0090] In some embodiments, the buffer member 13 includes a plurality of springs 131 arranged at intervals, and each spring 131 is connected to the first protection beam 11 and the second protection member 20, respectively. When the first protection beam 11 moves relative to the second protection beam 12 in the first direction towards the second protection member 20 and abuts against the spring 131, the spring 131 is adapted to be compressed in the first direction to convert part of the impact force into the compression energy of the spring 131, thereby being able to buffer the impact force transmitted by the second protection member 20 to the battery frame 100.

[0091] Specifically, when the second protection member 20 is subjected to the impact force and drives the buffer member 13 to move towards the first protection beam 11, the impact force received by the second protection member 20 is adapted to be transmitted to the battery frame 100 through the buffer member 13. At this time, the first protection beam 11 presses the spring 131, and when the spring 131 is compressed in the first direction, it can convert part of the impact force into the compression energy of the spring 131, thereby being able to buffer the impact force transmitted by the second protection member 20, reduce the impact force transmitted to the battery frame 100, reduce the impact force received by the battery pack 7, facilitate the protection of the battery pack 7, reduce the possibility of deformation and thermal runaway of the battery pack 7, and facilitate the improvement of the safety of the battery pack 7.

[0092] Among them, by arranging a plurality of springs 131, when the second protection member 20 is subjected to the impact force, the impact force transmitted by the second protection member 20 to the first protection beam 11 can be buffered by the plurality of springs 131 to sufficiently reduce the impact force transmitted to the battery frame 100, thereby being able to reduce the impact force transmitted to the battery pack 7 to protect the battery pack 7, reduce the possibility of deformation and thermal runaway of the battery pack 7, and facilitate the improvement of the safety of the battery pack 7.

[0093] In some examples, the buffer 13 includes a fixed portion 132 and a stop portion 133, the fixed portion 132 is connected with the second protection member 20, the fixed portion 132 has a plurality of conduits 1321 extending along the first direction, the plurality of springs 131 are sleeved on the plurality of conduits 1321, the stop portion 133 has a first avoiding hole 1331 avoiding the conduits 1321, the stop portion 133 is matched with the first protection beam 11 so that the stop portion 133 is movable relative to the conduits 1321, the stop portion 133 is matched with one end of the springs 131 away from the fixed portion 132 to push the springs 131 to deform, when the second protection member 20 is subjected to an impact force and the first protection beam 11 moves relative to the second protection beam 12 towards the second protection member 20, the first protection beam 11 compresses the springs 131 by the stop portion 133, and the springs 131 are deformed to buffer the impact force transmitted to the first protection beam 11 by the second protection member 20, and further buffer the impact force transmitted to the battery frame 100.

[0094] Specifically, when the first protection beam 11 stops at the stop portion 133 and drives the stop portion 133 to compress the springs 131, the conduits 1321 are adapted to extend into the first avoiding hole 1331 so that the first protection beam 11 can move along the first direction relative to the conduits 1321 smoothly, and interference between the conduits 1321 and the first protection beam 11 and the stop portion 133 is avoided.

[0095] Here, it is to be explained that the first avoiding hole 1331 on the stop portion 133 has a size greater than the diameter of the conduits 1321 but less than the diameter of the springs 131, so that the stop portion 133 can stop and compress the springs 131 smoothly while the conduits 1321 can extend into the first avoiding hole 1331, and the springs 131 are used to buffer the impact force transmitted to the second protection member 20 by the first protection beam 11.

[0096] In some examples, the fixed portion 132 can be directly connected with the second protection member 20 or indirectly connected with the second protection member 20, for example, a fourth protection member is arranged between the first protection member 10 and the second protection member 20, and the fixed portion 132 is adapted to be connected with the fourth protection member when the fourth protection member is fixed with the second protection member 20. Further, when a fixed beam is arranged between the fourth protection member and the first protection member 10, the fixed portion 132 is adapted to be connected with the fixed beam.

[0097] In some examples, the fixed portion 132 can be directly connected with the second protection member 20 or indirectly connected with the second protection member 20, for example, a fourth protection member is arranged between the first protection member 10 and the second protection member 20, and the fixed portion 132 is adapted to be connected with the fourth protection member when the fourth protection member is fixed with the second protection member 20. Further, when a fixed beam is arranged between the fourth protection member and the first protection member 10, the fixed portion 132 is adapted to be connected with the fixed beam. Figure 7As shown, the first protection beam 11 has a second abutting part on the side facing the buffer 13, the second abutting part is in abutting cooperation with the abutting part 133, the second abutting part has a third avoiding hole opposite to the first avoiding hole 1331, when the first protection beam 11 drives the abutting part 133 to move through the second abutting part, the guide pipe 1321 extends into the first avoiding hole 1331 and the third avoiding hole, so that the first protection beam 11 can smoothly drive the abutting part 133 to move relative to the fixed part 132 along the first direction, and at the same time, the spring 131 is compressed by the abutting part 133, so as to buffer the impact force transmitted to the battery frame 100 by the spring 131.

[0098] In some examples, the abutting part 133 and the second abutting part each include a plurality of horizontal ribs and vertical ribs to define a plurality of square first avoiding holes 1331 and third avoiding holes, and the horizontal ribs and vertical ribs on the abutting part 133 and the second abutting part are adapted to abut against the spring 131 to compress the spring 131.

[0099] In some embodiments of the present application, as shown in Figure 4 , Figure 9 As shown, one of the second protection beam 12 and the first protection beam 11 has a guide protrusion 121, and the other has a guide rail 111 extending along the first direction, the guide protrusion 121 extends into the guide rail 111 and is in sliding cooperation with the guide rail 111 to guide and support the movement of the second protection beam 12 relative to the first protection beam 11, thereby facilitating to improve the stability of the movement of the second protection beam 12 relative to the first protection beam 11.

[0100] Specifically, when the second protection beam 12 is subjected to an impact force and moves relative to the first protection beam 11 along the first direction, the guide protrusion 121 slides along the first direction in the guide rail 111 to guide the movement direction of the second protection beam 12, so that the second protection beam 12 can smoothly and stably move relative to the first protection beam 11 along the first direction, and the impact force on the second protection beam 12 is buffered by the friction between the second protection beam 12 and the first protection beam 11, thereby reducing the impact force of the second protection beam 12 on the battery frame 100 and the battery pack 7, protecting the battery pack 7, reducing the possibility of deformation and thermal runaway of the battery pack 7, and facilitating to improve the safety of the battery pack 7.

[0101] In some embodiments of the present application, as shown in Figure 2 The first protection member 10 is a plurality of, and the same side of the battery frame 100 is provided with a plurality of first protection members 10 arranged along the second direction, and the battery device 1 further comprises a buffer connecting member 40, the buffer connecting member 40 connects a plurality of second protection beams 12, and the second direction intersects the first direction.

[0102] The buffer connecting piece 40 can connect multiple moving pieces on the same side of the battery frame 100, so that when only one or several second protective beams 12 are subjected to impact force and move relative to the first protective beam 11, the buffer connecting piece 40 can drive all the second protective beams 12 on the same side of the battery frame 100 to move together, so as to buffer the impact force received by the battery device 1 by using multiple first protective pieces 10 on the same side of the battery frame 100, facilitate to improve the overall anti-collision ability of the battery device 1, facilitate to improve the overall impact resistance of the battery device 1, and better protect the battery pack 7 in the battery frame 100.

[0103] In addition, the buffer connecting piece 40 can also absorb part of the impact force received by the second protective beam 12, so as to further reduce the impact force transmitted to the battery frame 100, and further improve the protection effect on the battery pack 7,

[0104] In some optional embodiments of the present application, as shown in Figure 8 The buffer connecting piece 40 includes a plurality of first buffer ropes 41 arranged along a third direction, the first buffer ropes 41 extend along a second direction, each first buffer rope 41 is connected to a plurality of second protective beams 12 arranged along the second direction, and the third direction, the second direction and the first direction are perpendicular to each other.

[0105] When only one or several second protective beams 12 are subjected to impact force and move relative to the first protective beam 11, the plurality of first buffer ropes 41 can drive all the second protective beams 12 on the same side of the battery frame 100 to move together, so as to buffer the impact force received by the battery device 1 by using multiple first protective pieces 10 on the same side of the battery frame 100, facilitate to improve the impact resistance of the battery device 1, and better protect the battery pack 7 in the battery frame 100.

[0106] In addition, the impact force on the second protective beam 12 can be transmitted to the first buffer rope 41, and the first buffer rope 41 can absorb part of the impact force. Specifically, when the second protective beam 12 moves and drives the first buffer rope 41 to stretch, the first buffer rope 41 can convert the kinetic energy of the second protective beam 12 into heat energy and potential energy, and prolong the movement time of the second protective beam 12, so as to sufficiently buffer the impact force received by the second protective beam 12, and further reduce the impact force transmitted to the battery frame 100, so as to better protect the battery pack 7.

[0107] In some specific embodiments of the present application, as shown in Figure 8As shown, the buffer connecting piece 40 further comprises at least one second buffer rope 42 extending along the third direction, the second buffer rope 42 is wound and connected to the plurality of first buffer ropes 41 to connect the plurality of first buffer ropes 41 together, improve the strength and stability of the plurality of first buffer ropes 41, and when the impact force on the second protection beam 12 is transmitted to the second buffer rope 42 through the first buffer rope 41, the second buffer rope 42 can also absorb at least part of the impact force.

[0108] As shown in some embodiments, Figure 8 the buffer connecting piece 40 comprises a plurality of second buffer ropes 42, the plurality of second buffer ropes 42 are arranged at intervals along the second direction, the second buffer rope 42 has a knot at both ends in the third direction, so that the two ends of the second buffer rope 42 in the third direction are respectively fixed on two first buffer ropes 41 at the end of the plurality of first buffer ropes 41 in the third direction, and the middle part of the second buffer rope 42 is wound between the plurality of first buffer ropes 41 in a serpentine shape, thereby realizing the winding connection of the second buffer rope 42 and the plurality of first buffer ropes 41, and connecting the plurality of first buffer ropes 41 together by using the second buffer rope 42, so as to improve the overall structural strength and toughness of the buffer connecting piece 40.

[0109] In some embodiments, the first buffer rope 41 is a steel cable, the second buffer rope 42 is a steel cable, and the first buffer rope 41 and the second buffer rope 42 form a steel cable net structure, which has better overall strength and toughness and is more affordable, and the steel cable formed by the first buffer rope 41 and the second buffer rope 42 can absorb a large amount of collision energy to fully buffer the impact force received by the second protection beam 12, thereby reducing the impact force transmitted to the battery frame 100 to better protect the battery pack 7.

[0110] In some specific embodiments of the present application, as shown in Figure 4 , Figure 9 the second protection beam 12 is provided with a mounting seat 14, the mounting seat 14 has a plurality of connecting rings 141, the plurality of connecting rings 141 are arranged along the third direction, and the plurality of first buffer ropes 41 are fixed on the plurality of connecting rings 141 to connect the first buffer ropes 41 and the second protection beam 12 through the connecting rings 141, so that the second protection beam 12 can move together with the mounting seat 14 and the buffer connecting piece 40 when the second protection beam 12 moves.

[0111] In some embodiments, as shown in Figure 8 , Figure 9 the battery frame 100 comprises two first protection beams 10 on the same side in the first direction, the two ends of the first buffer rope 41 form a knot, and the knot is adapted to be wound and fixed in the connecting ring 141 to fix the two ends of the first buffer rope 41 in the second direction on the two second protection beams 12 respectively.

[0112] In some embodiments, the mounting base 14 is provided with a reinforcing portion connected with the connecting ring 141, so as to enhance the strength of the mounting base 14 as a whole, prevent the connecting ring 141 from being separated from the mounting base 14, and thus stably and reliably connect the first buffer rope 41 and the second guard beam 12 together, and reduce the possibility of the first buffer rope 41 being separated from the second guard beam 12.

[0113] In some examples, as shown in Figure 9 the reinforcing portion includes a plurality of first reinforcing ribs 1421 arranged along the third direction, the first reinforcing ribs 1421 extending along the first direction, and at least one second reinforcing rib 1422 extending along the third direction and intersecting with the plurality of first reinforcing ribs 1421, so as to reinforce the structural strength of the mounting base 14 as a whole by means of the first reinforcing ribs 1421 and the second reinforcing rib 1422.

[0114] Each connecting ring 141 is arranged at the connection between the first reinforcing rib 1421 and the second reinforcing rib 1422, so as to arrange the connecting ring 141 at a position with relatively strong structure on the mounting base 14, prevent the connecting ring 141 from being separated from the mounting base 14, and thus stably and reliably connect the first buffer rope 41 and the second guard beam 12 together, and reduce the possibility of the first buffer rope 41 being separated from the second guard beam 12.

[0115] Further, in the first direction, the thickness of the first reinforcing rib 1421 gradually increases towards the connecting ring 141, so as to arrange the connecting ring 141 at a position with relatively strong structure on the mounting base 14, and simultaneously facilitate saving materials and reducing the weight of the mounting base 14.

[0116] In some embodiments, as shown in Figure 4 the first guard beam 11 is sleeved on the second guard beam 12, the second guard beam 12 has a guide protrusion 121, the first guard beam 11 has a guide rail 111 penetrating through the wall thickness thereof, the guide rail 111 extends along the first direction, the guide protrusion 121 is adapted to extend into the guide rail 111 and slide-fits with the guide rail 111, and when the second guard beam 12 moves relative to the first guard beam 11 along the first direction, the guide protrusion 121 slides in the guide rail 111, so as to guide the moving direction of the second guard beam 12, and thus facilitate improving the stability of the movement of the second guard beam 12.

[0117] The mounting base 14 is connected with the guide protrusion 121, so as to fix the mounting base 14 on the second guard beam 12, and thus connect the second guard beam 12 and the plurality of first buffer ropes 41 by means of the mounting base 14.

[0118] Further, the second protection beam 12 is provided with a plurality of guide protrusions 121, the plurality of guide protrusions 121 are suitable for stably fixing the mounting seat 14 on the second protection beam 12, thereby facilitating the stable connection of the second protection beam 12 and the plurality of first buffer ropes 41.

[0119] The first protection beam 11 has a plurality of guide rails 111, the plurality of guide rails 111 are arranged along the third direction, each guide rail 111 is in sliding fit with at least one guide protrusion 121, thereby the movement of the second protection beam 12 can be guided and supported by the movement fit of the guide protrusions 121 and the guide rails 111.

[0120] In some examples, as shown in Figure 7 、 Figure 9 The second protection beam 12 is provided with a plurality of first connecting holes 125, the mounting seat 14 has second connecting holes, the guide protrusions 121 are suitable for being screwed through the second connecting holes and the first connecting holes 125, and at least part of the guide protrusions 121 is located in the guide rails 111, so that when the movement of the second protection beam 12 is guided by the guide protrusions 121 and the guide rails 111, the mounting seat 14 can also be fixed on the second protection beam 12 by the guide protrusions 121, thereby facilitating the reduction of the structural complexity of the second protection beam 12, and further facilitating the reduction of the cost.

[0121] In some examples, the first protection beam 11 has a first cavity, at least part of the second protection beam 12 extends into the first cavity, and the second protection beam 12 has a second cavity, so that when the first protection member 10 is subjected to an impact force, the second protection beam 12 and the first protection beam 11 can be collapsed, thereby the second protection beam 12 and the first protection beam 11 can absorb part of the impact force, and at the same time, the second protection beam 12 can move relative to the first protection beam 11 along the first direction to buffer the impact force, thereby the impact force transmitted to the battery frame 100 can be sufficiently reduced, so as to protect the battery pack 7.

[0122] In some embodiments of the present application, the battery frame 100 includes a frame portion and a bottom portion, the bottom portion includes a bottom plate and a bottom guard plate which are stacked, the battery pack 7 is suitable for being supported on the bottom plate, and the bottom guard plate is provided with a plurality of reinforcing plates on the side away from the bottom plate and arranged along the first direction, so that a multi-layer bottom portion can be formed by the bottom plate, the bottom guard plate and the reinforcing plates, thereby better supporting the battery pack 7 and better protecting the battery pack 7, so that when the bottom portion of the battery device 1 is subjected to an impact force, the possibility of damage to the battery pack 7 can be reduced.

[0123] In some embodiments, the reinforcing plates 103 are three, and the three reinforcing plates 103 are arranged along the first direction and extend along the second direction.

[0124] In some embodiments, the base plate is fixedly connected to the bottom end of the frame, the bottom guard plate is connected to the base plate by friction stir welding, and the connection between the reinforcing plate 103 and the bottom guard plate is made by structural adhesive and welding.

[0125] In some embodiments of the present invention, such as Figure 1 , Figure 2 As shown, there are multiple first protective components 10. Multiple first protective components 10 are arranged along the second direction on the same side of the battery frame 100. The second direction intersects with the first direction. When the battery device 1 is subjected to an impact force, multiple first protective components 10 can be used to buffer the impact force, so as to fully reduce the impact force transmitted to the battery frame 100 and facilitate the protection of the battery pack 7.

[0126] The multiple protective components also include a second protective component 20. The ends of multiple first protective components 10 on the same side of the battery frame 100 that are away from the battery frame 100 are connected by the second protective component 20. The second protective component 20 is provided with at least one buffer cavity 201. When the second protective component 20 is subjected to an impact force, the cavity 201 is adapted to collapse and the second protective component 20 is adapted to deform in order to absorb at least part of the impact force, thereby reducing the impact force transmitted to the first protective component 10 and facilitating the protection of the battery pack 7.

[0127] In some alternative embodiments of the present invention, such as Figure 1 As shown, the second protective member 20 connects to one end of a plurality of second protective beams 12 facing away from the battery frame 100 in the first direction. After the second protective member 20 absorbs part of the impact force, it can directly transmit the impact force to the second protective beams 12, thereby driving the second protective beams 12 to move relative to the first protective beams 11 in the first direction. This allows the second protective beams 12 to buffer the impact force during movement, thereby significantly reducing the impact force transmitted to the battery frame 100 and protecting the battery pack 7.

[0128] In some specific embodiments of the present invention, such as Figure 4 , Figure 7 As shown, the second protective beam 12 has a limiting part 123 protruding from the outer periphery, the limiting part 123 abuts against the end of the first protective beam 11 facing away from the battery frame 100, and the second protective member 20 is connected to the limiting part 123.

[0129] Specifically, the limiting part 123 is arranged on the second protection beam 12, and the movement of the second protection beam 12 in the first direction towards the battery frame 100 is limited. In the embodiment in which the battery device 1 is applied in a vehicle, the second protection member 20 is connected to the support frame of the vehicle, that is, the position of the second protection member 20 is fixed. Thus, the movement of the second protection beam 12 in the first direction away from the battery frame 100 is limited, so that the second protection beam 12 does not move relative to the first protection beam 11 when the battery device 1 is not subjected to an impact force or the impact force subjected by the battery device 1 is small. When the second protection beam 12 is subjected to an impact force from the second protection member 20, the second protection beam 12 can transmit part of the impact force to the first protection beam 11 through the limiting part, so as to resist the impact force together with the first protection beam 11. Specifically, when the first protection beam 11 transmits the impact force to the battery frame 100, the second protection member 20, the first protection member 10 and the battery frame 100 can together buffer the impact force, so as to improve the overall connectivity of the second protection member 20, the first protection member 10 and the battery frame 100, and improve the impact resistance of the battery device 1.

[0130] When the battery device 1 is subjected to a large impact force, causing the second protection beam 12 and / or the first protection beam 11 to deform, or the limiting part 123 to deform, the limiting part 123 can enter the first protection beam 11. At this time, the limiting function of the limiting part 123 is lost, and the second protection beam 12 is adapted to move in the first direction relative to the first protection beam 11. When the second protection beam 12 moves in the first direction relative to the first protection beam 11, it can buffer the impact force, thereby reducing the impact force transmitted to the battery frame 100 and the battery pack 7, so as to protect the battery pack 7.

[0131] In some embodiments, the second protection member 20 is welded to the limiting part 123.

[0132] In some optional embodiments of the present application, as shown in Figure 10 The second protection member 20 includes a first energy-absorbing beam 21 and a second energy-absorbing beam 22 fixedly connected in the first direction. The first energy-absorbing beam 21 extends in the second direction, and one end of the second protection beam 12 away from the battery frame 100 is connected to the first energy-absorbing beam 21. The second energy-absorbing beam 22 is connected to the first energy-absorbing beam 21 at both ends in the second direction. The cavity 201 includes a first energy-absorbing cavity 211 arranged on the first energy-absorbing beam 21 and a second energy-absorbing cavity 221 arranged on the second energy-absorbing beam 22. When the battery device 1 is subjected to an impact force, the first energy-absorbing beam 21 and the second energy-absorbing beam 22 can collapse, thereby together absorbing part of the impact force, reducing the impact force transmitted to the first protection member 10 and reducing the impact force transmitted to the battery frame 100, so as to protect the battery pack 7.

[0133] In some embodiments, as shown in Figure 10 The first energy-absorbing beam 21 defines a first energy-absorbing cavity 211 in a honeycomb shape. In some examples, at least one sidewall of the first energy-absorbing beam 21 is wavy.

[0134] Further, as shown in Figure 10 The first energy-absorbing cavity 211 is provided with a partition rib 24, which is adapted to divide the first energy-absorbing cavity 211 into two chambers, so as to enhance the load-bearing capacity and structural strength of the first energy-absorbing beam 21. This facilitates ensuring that the second protective member 20 has a certain structural strength while being able to absorb a large amount of impact energy.

[0135] In some embodiments, the second energy-absorbing beam 22 defines a second energy-absorbing cavity 221 in a quadrilateral shape. In some examples, two sidewalls of the second energy-absorbing beam 22 opposite in the first direction are wavy.

[0136] In some specific embodiments of the present application, as shown in Figure 10 The second energy-absorbing beam 22 forms an arc-shaped beam protruding away from the first energy-absorbing beam 21, so as to form a buffer cavity 23 between the first energy-absorbing beam 21 and the second energy-absorbing beam 22. When the second protective member 20 is impacted, the buffer cavity 23 is adapted to collapse and absorb a large amount of impact energy, so as to increase the buffer energy-absorbing capacity of the first protective member 10, thereby facilitating improving the reliability of the battery device 1 in protecting the battery pack 7.

[0137] In some embodiments, as shown in Figure 10 The second energy-absorbing beam 22 includes an arc-shaped beam in the middle and straight-line-shaped beams on both sides, which extend along the second direction. The straight-line-shaped beams are welded or fixed to the first energy-absorbing beam 21 by bolts, screws or other fasteners, so as to fixedly connect the first energy-absorbing beam 21 and the second energy-absorbing beam 22 together.

[0138] In some examples, the sidewall of the first energy-absorbing beam 21 in the first direction towards the second energy-absorbing beam 22 is a wavy sidewall, and the sidewall of the second energy-absorbing beam 22 in the first direction towards the first energy-absorbing beam 21 is a wavy sidewall. The two wavy sidewalls cooperate, and the wavy sidewalls facilitate increasing the structural strength of the first energy-absorbing beam 21 and the second energy-absorbing beam 22, thereby facilitating improving the impact resistance of the first energy-absorbing beam 21 and the second energy-absorbing beam 22.

[0139] In addition, the wavy sidewalls facilitate increasing the cooperation area of the first energy-absorbing beam 21 and the second energy-absorbing beam 22, thereby facilitating improving the stability of the fixed connection of the first energy-absorbing beam 21 and the second energy-absorbing beam 22.

[0140] In some embodiments of the present application, as shown in Figures 11-14As shown, the plurality of protection members further comprises a third protection member 30 connected between the battery frame 100 and the first protection member 10, the third protection member 30 defines a plurality of third energy absorption cavities 301, and the third protection member 30 is adapted to absorb at least part of the impact force when the battery device 1 is impacted by the impact force, so as to reduce the impact force transmitted to the battery frame 100, thereby being capable of protecting the battery pack 7.

[0141] In some optional embodiments of the present application, as shown in Figure 13 、 Figure 14 As shown, the third protection member 30 comprises a plurality of third reinforcing ribs 31 arranged along a third direction and a plurality of connecting ribs 32 connecting two adjacent third reinforcing ribs 31 along the third direction, and the connecting ribs 32 and the third reinforcing ribs 31 define a plurality of third energy absorption cavities 301. By arranging the third reinforcing ribs 31 and the connecting ribs 32, on the one hand, the overall strength of the third protection member 30 can be improved, and on the other hand, more third energy absorption cavities 301 can be defined, so as to improve the energy absorption capacity of the third protection member 30, thereby being capable of better protecting the battery pack 7.

[0142] In some embodiments, as shown in Figure 13 At least part of the connecting ribs 32 has a bent portion, and the connecting rib 32 and the two adjacent third reinforcing ribs 31 can form a third energy absorption cavity 301 in the shape of a hexagon, a quadrilateral or the like.

[0143] In some embodiments, as shown in Figure 14 One of the connecting ribs 32 is arranged at the middle of the third reinforcing ribs 31 in the second direction and connects a plurality of third reinforcing ribs 31 along the third direction, so as to connect the plurality of third reinforcing ribs 31 together, thereby being capable of improving the overall strength of the third protection member 30.

[0144] Further, the plurality of third reinforcing ribs 31 arranged along the third direction can be three, four, five or more. The connecting rib 32 arranged at the middle of the third reinforcing ribs 31 in the second direction is adapted to connect all the third reinforcing ribs 31 along the third direction.

[0145] In some optional embodiments of the present application, as shown in Figure 4 、 Figure 11 The battery device 1 further comprises a connecting beam 50 connecting the third protection member 30 and the first protection member 10, the connecting beam 50 has a first connecting portion 51, the first protection beam 11 has a second connecting portion 112 matched with the first connecting portion 51, and the first protection beam 11 and the connecting beam 50 are connected together through the first connecting portion 51 and the second connecting portion 112.

[0146] The connecting beam 50 defines a placing cavity 501, and the second protective beam 12 or the deformable buffer 13 connected with the second protective beam 12 is located in the placing cavity 501. When the second protective beam 12 moves relative to the first protective beam 11 in the first direction, the second protective beam 12 is adapted to move towards the bottom wall of the placing cavity 501, and in turn compresses the buffer 13, buffers the impact force transmitted to the connecting beam 50 by the second protective beam 12, and in turn reduces the impact force transmitted to the third protective member 30 and the battery pack 7.

[0147] In some embodiments, the first connecting part 51 and the second connecting part 112 are connecting holes, and the first connecting part 51 and the second connecting part 112 are arranged opposite to each other, and the first fastener is adapted to pass through the first connecting part 51 and the second connecting part 112 to fixedly connect the first protective beam 11 and the connecting beam 50 together.

[0148] In some embodiments, the first protective beam 11 is sleeved on the connecting beam 50 at one end of the battery frame 100, and the first fastener is adapted to be screwed through the second connecting part 112 and the first connecting part 51.

[0149] The buffer 13 is located in the placing cavity 501, and when the second protective beam 12 moves relative to the first protective beam 11 in the first direction, the second protective beam 12 is adapted to compress the buffer 13 in the placing cavity 501 to buffer the impact force received by the second protective beam 12 by the buffer 13, and in turn reduce the impact force transmitted to the battery frame 100 and the battery pack 7, and in turn protect the battery pack 7.

[0150] In some embodiments, as shown in Figure 5 , Figure 13 The fixing part 132 is provided with a third connecting hole 1322, and the connecting beam 50 has a fourth connecting hole 52, the third connecting hole 1322 and the fourth connecting hole 52 are arranged opposite to each other, and the fastener is adapted to be screwed through the fourth connecting hole 52 and the third connecting hole 1322 to fix the fixing part 132 and the connecting beam 50 together, and in turn fix the buffer 13 in the placing cavity 501.

[0151] Further, as shown in Figure 4 , Figure 11 In the first direction, the buffer 13 is located on the side of the first protective beam 11 towards the battery frame 100, and therefore the fourth connecting hole 52 is located on the side of the first connecting part 51 towards the battery frame 100.

[0152] In some optional embodiments of the present application, as shown in Figure 11 , Figure 12As shown, the battery frame 100 comprises two first side beams 101 arranged along a first direction and two second side beams 102 arranged along a second direction, two ends of the first side beams 101 are connected with the ends of the two second side beams 102 respectively to form an accommodating cavity, and the third protective member 30 is connected with the first side beams 101, so that the battery pack 7 is conveniently arranged in the accommodating cavity, and the first side beams 101 and the second side beams 102 can also protect the battery pack 7.

[0153] In some embodiments of the present application, the first side beams 101 and the third protective member 30 are integrally formed, so as to improve the energy density and light weight of the battery device 1, and the structural integration also enhances the structural strength of the third protective member 30, so as to form a strong energy absorption protection of the battery pack 7, greatly improving the anti-collision ability of the battery device 1, and further conveniently ensuring the battery pack 7.

[0154] In some embodiments, the first side beams 101 and the third protective member 30 are integrally formed by a die casting process.

[0155] In some embodiments, the second side beams 102 are formed by an aluminum extrusion process.

[0156] In some examples, the first side beams 101 and the second side beams 102 are welded to connect the first side beams 101 and the second side beams 102 together, so as to protect the battery pack 7 by the first side beams 101 and the second side beams 102 together.

[0157] Specifically, compared with the bolt connection of the first side beams 101 and the second side beams 102, the welding connection of the first side beams 101 and the second side beams 102 has higher strength, stronger anti-collision ability, and reduces material cost and the overall weight of the battery device 1.

[0158] Further, the first side beams 101 and the second side beams 102 are arc welded.

[0159] In some examples, the battery frame 100 further comprises a bottom plate and a bottom protective plate, the bottom plate is connected to the ends of the first side beams 101 and the second side beams 102 in a third direction, the battery pack 7 is adapted to be supported on the bottom plate, and the bottom protective plate is arranged on a side of the bottom plate away from the battery pack 7.

[0160] Among them, the battery frame 100 further comprises a plurality of reinforcing plates 103, three reinforcing plates 103 are arranged on a side of the bottom protective plate away from the bottom plate, for enhancing the strength of the bottom protective plate to better support the battery pack 7.

[0161] Further, the bottom protective plate is connected to the bottom plate by friction stir welding, and the connection between the reinforcing plate 103 and the bottom protective plate is connected by structural adhesive and welding.

[0162] Among them, there are three reinforcing plates 103, which are arranged along the first direction and extend along the second direction, and are respectively connected to the two second side beams 102.

[0163] In some examples, the battery frame 100 also includes a cover, and the cover and the base plate are spaced apart along a third direction and are connected to the first side beam 101 and the second side beam 102 to provide a relatively enclosed space for the battery pack 7.

[0164] In some examples, such as Figure 12 As shown, the battery frame 100 also includes a middle crossbeam 104, which extends along the second direction and is connected to two second side beams 102 respectively. The two second side beams 102, the middle crossbeam 104 and the reinforcing plate 103 are all formed by aluminum extrusion process.

[0165] In addition, the first side beam 101 can also be considered as the side beam of the bottom guard plate along the first direction, which greatly improves the front and rear anti-collision capability of the battery pack 7 along the first direction and the overall vehicle weight reduction, while reducing material costs.

[0166] In some specific embodiments of the present invention, such as Figure 11 As shown, the battery device 1 also includes a power distribution component. The first side beam 101 has a mounting cavity 1021 that communicates with the inside of the battery frame 100. The mounting cavity 1021 is used to install the power distribution component, which makes it easier to reserve more space for the receiving cavity, and thus reserve more space for the battery pack 7, which makes it easier to increase the capacity of the battery pack 7.

[0167] In addition, the power distribution components are placed on the first side beam 101 to enhance the anti-collision protection of the power distribution components and ensure their electrical safety.

[0168] In some specific embodiments of the present invention, the first side beam 101 and the third protective member 30 jointly define an exhaust channel 61 that communicates with the receiving cavity. When the pressure and temperature in the receiving cavity rise sharply, the gas in the battery frame 100 can be discharged through the exhaust channel 61, thereby depressurizing the inside of the battery frame 100.

[0169] Specifically, an explosion-proof valve 62 is provided at the outlet 612 of the exhaust channel 61 to exhaust gas under set conditions. When the pressure and temperature in the containment cavity rise sharply to a preset value, the explosion-proof valve 62 opens to discharge the gas in the battery frame 100 to depressurize the inside of the battery frame 100.

[0170] Further, the exhaust passage 61 is defined by the first side beam 101 and the third protection member 30, and the third energy absorption cavity 301 on the third side beam is used to protect the exhaust passage 61, so that the structural strength of the exhaust passage 61 is enhanced, and the exhaust passage 61 can maintain its shape after the battery device 1 is subjected to a collision, so that the exhaust passage 61 can normally exhaust.

[0171] In some embodiments, the explosion-proof valve 62 is adapted to break at a preset pressure to open the outlet of the exhaust passage 61 to achieve pressure relief of the exhaust passage 61.

[0172] In some embodiments, the explosion-proof valve 62 includes a weak part, and the specific form of the weak part can be a cross-shaped notch, an annular groove, a thinned area, or a pre-prepared crack initiation point. When the pressure in the exhaust passage 61 reaches the preset pressure, the weak part breaks to form a pressure relief port on the explosion-proof valve 62, and at this time, the gas in the exhaust passage 61 can be discharged through the pressure relief port to achieve pressure relief of the exhaust passage 61.

[0173] In some embodiments, the explosion-proof valve 62 includes a valve body and a valve core, the valve body defines a pressure relief port, and the valve core is movably arranged in the pressure relief port to open or close the pressure relief port.

[0174] Further, the explosion-proof valve 62 further includes an elastic element connected to the valve body and the valve core, wherein when the set condition is reached, the valve core is pressed by an external force and moves to a position that opens the pressure relief port under the action of the elastic element, at this time, the gas in the exhaust passage 61 can be discharged through the pressure relief port to achieve pressure relief of the exhaust passage 61. The pressing of the valve core can be manually implemented by the user or mechanically implemented, which is not limited here.

[0175] In some embodiments, the valve core can be repeatedly moved back and forth to effectively cope with the fluctuation of the pressure in the containment cavity multiple times to protect the internal environment of the containment cavity.

[0176] In some embodiments, as shown in Figure 15 , Figure 16 In some embodiments, as shown in FIGS. 1 and 2, the inlet 611 of the exhaust passage 61 is located on the first side wall of the first side beam 101, and the outlet 612 of the exhaust passage 61 is located on the second side wall of the third protection member 30. The extension direction of the first side wall intersects the extension direction of the second side wall, so that the direction of the gas changes after entering the exhaust passage 61 from the inlet 611 and then being discharged from the outlet 612. In this way, when the gas collides with the explosion-proof valve 62, the gas can be prevented from colliding with the battery pack 7 after rebounding, thereby protecting the battery pack 7.

[0177] ​In some examples, the first side wall is a side wall of the first side beam 101 in the first direction, and the second side wall is a side wall of the third protection piece 30 in the third direction, and the extending direction of the first side wall is perpendicular to the extending direction of the second side wall. Wherein, the axis direction of the inlet 611 extends along the first direction, and the axis direction of the outlet 612 extends along the third direction, and the battery pack 7 is located on one side of the inlet 611 in the first direction, and when the gas inside the battery frame 100 is discharged through the exhaust passage 61, the gas can be prevented from rebounding to the battery pack 7 when the gas impacts the explosion-proof valve 62 and rebounds, thereby reducing the impact force of the gas on the battery pack 7, so as to protect the battery pack 7.

[0178] In some embodiments, the bottom surface of the third protection piece 30 has a containing recess 64 recessed towards the exhaust passage, the containing recess 64 is communicated with the outlet 612, the explosion-proof valve 62 is arranged in the containing recess 64, and the explosion-proof valve 62 does not exceed the bottom surface, so as to facilitate protection of the explosion-proof valve 62 and reduce the possibility that the explosion-proof valve 62 is impacted from the outside of the battery device 1.

[0179] Specifically, the explosion-proof valve 62 does not exceed the bottom surface of the third protection piece 30, and is also lower than the bottom surface of the battery frame 100, so as to facilitate protection of the explosion-proof valve 62 by using the space inside the battery frame 100, and avoid that the explosion-proof valve 62 is impacted, scratched or the like by external components.

[0180] In some examples, as shown in Figure 12 , Figure 17 , the battery device 1 further comprises an explosion-proof valve mounting portion 63, the explosion-proof valve mounting portion 63 is arranged in the containing recess 64, the explosion-proof valve mounting portion 63 has a matching through hole matched with the explosion-proof valve 62, and the explosion-proof valve mounting portion 63 is used for limiting the position of the explosion-proof valve 62.

[0181] Specifically, by arranging the containing recess 64, the explosion-proof valve mounting portion 63 is arranged in the containing recess 64, so as to facilitate that the explosion-proof valve mounting portion 63 and the end portion of the explosion-proof valve 62 do not exceed the bottom surfaces of the third protection piece 30 and the first side beam 101, so as to protect the explosion-proof valve 62 and reduce the possibility that the explosion-proof valve 62 is impacted from the outside of the battery device 1.

[0182] Further, the explosion-proof valve mounting portion 63 is welded and fixed to the bottom wall of the containing recess 64.

[0183] Further, as shown in Figure 18 , the explosion-proof valve mounting portion 63 has a reinforcing protrusion 631, and the matching through hole is arranged in the reinforcing protrusion 631, and by arranging the reinforcing protrusion 631, the structural strength of the explosion-proof valve mounting portion 63 can be improved, and the support stability of the explosion-proof valve mounting portion 63 to the explosion-proof valve 62 can be improved.

[0184] In some embodiments of the present application, when the battery device 1 is subjected to an impact force, the impact force is first buffered by the second protective member 20, then buffered by the first protective member 10, and finally buffered by the third protective member 30, so as to sufficiently reduce the impact force transmitted to the battery frame 100, thereby facilitating to improve the impact resistance of the battery device 1 and to sufficiently protect the battery pack 7.

[0185] In the present application, the first protective member 10, the second protective member 20 and the third protective member 30 have different impact resistance to the impact force, and the closer to the battery frame 100, the stronger the energy absorption intensity.

[0186] Specifically, the second protective member 20 is a weak-level energy absorption protection, the first protective member 10 is a medium-level energy absorption protection, and the third protective member 30 is a strong-level energy absorption protection.

[0187] In the present application, when the battery device 1 is subjected to an impact force, the first energy absorption beam 21 and the second energy absorption beam 22 of the second protective member 20 are adapted to collapse to absorb a large amount of collision energy. The second protective beam 12 of the first protective member 10 can move relative to the first protective beam 11 and press the buffer member 13, and the buffer member 13 and the buffer connecting member 40 can further absorb a large amount of collision energy. The third energy absorption cavity 301 in the third protective member 30 is adapted to collapse to absorb the remaining collision energy.

[0188] In some embodiments of the present application, as shown in Figure 1 , Figure 2 The battery device 1 includes four third protective members 30, four first protective members 10 and two second protective members 20. The battery frame 100 is provided with two third protective members 30 on each side in the first direction, and the two third protective members 30 are arranged along the second direction. The four first protective members 10 are in one-to-one correspondence with the four third protective members 30 and are bolted. The two second protective members 20 are located on each side of the battery frame 100 in the first direction, and the second protective member 20 extends along the second direction. The second protective member 20 is welded to the two first protective members 10 on the same side of the battery frame 100 in the first direction.

[0189] The following describes an electric device according to an embodiment of the present application. The electric device according to the embodiment of the present application includes the battery device 1 according to the above-mentioned embodiments of the present application, and the battery pack 7 is arranged in the battery frame 100.

[0190] Here, the electric device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, an energy storage device, an aircraft, a computer, etc.

[0191] The electric toy can include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric plane toy, and the like; the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like; the electric tool can include a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, an electric planer, and the like.

[0192] According to the power consuming equipment of the embodiment of the present application, by using the battery device 1 of the above-mentioned embodiment of the present application, the cavity 201 of the second protection member 20 can be collapsed to buffer the impact force, at least part of the first protection member 10 can be moved to buffer the impact force, the impact force can be fully buffered by using the first protection member 10 and the second protection member 20, and then the impact force transmitted to the battery frame 100 and the battery pack 7 can be fully reduced to protect the battery pack 7, reduce the possibility of deformation and thermal runaway of the battery pack 7, facilitate to improve the safety of the battery pack 7, and then facilitate to improve the safety of the power consuming equipment.

[0193] In some embodiments, the power consuming equipment is a vehicle, which can be a pure electric vehicle or a hybrid vehicle.

[0194] When the battery device 1 is applied in the vehicle, at least part of the battery device 1 is connected to the suspension, the vehicle body, or the like of the vehicle to form the vehicle.

[0195] Other configurations and operations of the vehicle according to the embodiment of the present application are known to those skilled in the art, and will not be described in detail here.

[0196] In the description of the application, it is necessary to understand that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the features defined as "first", "second" can be explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "a plurality of" is two or more, unless otherwise specified. In the description of the application, the first feature "above" or "below" the second feature can include the first and second features in direct contact, or the first and second features not in direct contact but in contact through another feature between them.

[0197] In the description of the application, the first feature "above", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in height.

[0198] In the description of the application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0199] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0200] Although embodiments of the application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirit of the application, and the scope of the application is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that, include: A battery frame (100) having a receiving cavity for placing a battery pack (7). Multiple protective components, including at least a first protective component (10) and a second protective component (20), wherein the first protective component (10) is located on at least one side of the battery frame (100) in a first direction, and the second protective component (20) is connected to the first protective component (10) on at least one side of the first protective component (10) in the first direction. The second protective member (20) is provided with at least one cavity (201), and at least a portion of the first protective member (10) is movable to buffer the impact force in the first direction. The second protective member (20) and the battery frame (100) are located on both sides of the first protective member (10) in the first direction. The first protective member (10) includes a first protective beam (11) and a second protective beam (12) arranged in a sleeved manner. The first protective beam (11) is connected to the battery frame (100), and the second protective beam (12) is connected to the second protective member (20). The first protective beam (11) and the second protective beam (12) are configured to move relative to each other along the first direction to buffer the impact force. The battery device further includes a connecting beam (50) that connects the battery frame (100) and the first protective member (10). The connecting beam (50) has a first connecting portion (51), and the first protective beam (11) has a second connecting portion (112) that mates with the first connecting portion (51). The connecting beam (50) defines a placement cavity (501), and the second protective beam (12) is adapted to extend into the placement cavity (501) when moving relative to the first protective beam (11).

2. The battery device according to claim 1, characterized in that, The first protective member (10) further includes a deformable buffer member (13), which is located on the side of the first protective member (10) facing the battery frame (100) in the first direction. The buffer member (13) is connected to the battery frame (100) and the second protective beam (12) respectively.

3. The battery device according to claim 2, characterized in that, The buffer (13) includes a plurality of spaced springs (131), each of which is connected to the second protective beam (12) and the battery frame (100).

4. The battery device according to claim 3, characterized in that, The buffer (13) further includes a fixing part (132) and a stop part (133). The fixing part (132) is connected to the battery frame (100). The fixing part (132) has a plurality of conduits (1321) extending along the first direction. A plurality of springs (131) are sleeved on the plurality of conduits (1321). The stop part (133) has a first clearance hole (1331) that avoids the conduits (1321). The stop part (133) cooperates with the second protective beam (12) so that the stop part (133) can move relative to the conduit (1321). The stop part (133) cooperates with the end of the spring (131) facing away from the fixed part (132) to push the spring (131) to deform.

5. The battery device according to claim 2, characterized in that, The buffer (13) is located inside the placement cavity (501).

6. The battery device according to claim 1, characterized in that, The first protective component (10) is multiple, and multiple first protective components (10) arranged along the second direction are provided on the same side of the battery frame (100). The battery device also includes a buffer connector (40), which connects multiple second protective beams (12). The second direction intersects with the first direction. And / or, the battery frame (100) includes a frame portion and a bottom portion, the bottom portion including a stacked base plate and a bottom guard plate, the base plate being used to support the battery pack (7), and the bottom guard plate having a plurality of reinforcing plates arranged along a first direction on the side facing away from the base plate.

7. The battery device according to claim 1, characterized in that, The battery frame (100) has multiple first protective members (10) arranged along a second direction on the same side. The battery device also includes a buffer connector (40) that connects multiple second protective beams (12). The second direction intersects with the first direction. The buffer connector (40) includes a plurality of first buffer ropes (41) arranged along a third direction. The first buffer ropes (41) extend along a second direction. Each first buffer rope (41) is connected to a plurality of second protective beams (12) arranged along the second direction. The buffer connector (40) also includes at least one second buffer rope (42). The second buffer rope (42) extends along the third direction and is wound around and connected to the plurality of first buffer ropes (41). The third direction, the second direction and the first direction are perpendicular to each other.

8. The battery device according to claim 7, characterized in that, The second protective beam (12) is provided with a mounting base (14), and the mounting base (14) has a plurality of connecting rings (141) arranged along the third direction, and a plurality of first buffer ropes (41) are fixed to the plurality of connecting rings (141). The mounting base (14) is provided with a reinforcing part connected to the connecting ring (141). The reinforcing part includes a plurality of first reinforcing ribs (1421) and at least one second reinforcing rib (1422). The plurality of first reinforcing ribs (1421) are arranged along the third direction. The first reinforcing ribs (1421) extend along the first direction. The second reinforcing ribs (1422) extend along the third direction and intersect with the plurality of first reinforcing ribs (1421). Each connecting ring (141) is provided at the connection between the first reinforcing ribs (1421) and the second reinforcing ribs (1422). And / or, the first protective beam (11) is fitted over the second protective beam (12), the second protective beam (12) has a guide protrusion (121), the first protective beam (11) has a guide rail (111) extending through its wall thickness, the guide rail (111) extending along the first direction, the guide protrusion (121) being adapted to extend into the guide rail (111) and slidingly engaging with the guide rail (111), and the mounting base (14) being connected to the guide protrusion (121).

9. The battery device according to claim 1, characterized in that, The first protective member (10) is multiple, and multiple first protective members (10) arranged along the second direction are provided on the same side of the battery frame (100), and the second direction intersects with the first direction; The ends of a plurality of first protective members (10) on the same side of the battery frame (100) opposite to the battery frame (100) are connected by second protective members (20).

10. The battery device according to claim 9, characterized in that, The second protective beam (12) has a limiting part (123) protruding from the outer periphery, the limiting part (123) abutting against the end of the first protective beam (11) facing away from the battery frame (100), and the second protective member (20) is connected to the limiting part (123). And / or, the second protective member (20) includes a first energy-absorbing beam (21) and a second energy-absorbing beam (22) connected in a first direction, the first energy-absorbing beam (21) extending in the second direction, the second protective beam (12) being connected to the first energy-absorbing beam (21) at one end in the first direction away from the battery frame (100), the second energy-absorbing beam (22) forming an arc-shaped beam protruding in a direction away from the first energy-absorbing beam (21), the second energy-absorbing beam (22) being connected to the first energy-absorbing beam (21) at both ends in the second direction, and the cavity (201) including a first energy-absorbing cavity (211) disposed in the first energy-absorbing beam (21) and a second energy-absorbing cavity (221) disposed in the second energy-absorbing beam (22).

11. The battery device according to any one of claims 1-10, characterized in that, The plurality of protective components also include a third protective component (30) connected between the battery frame (100) and the first protective component (10), the third protective component (30) defining a plurality of third energy-absorbing cavities (301), wherein the third protective component (30) includes a plurality of third reinforcing ribs (31) and a plurality of connecting ribs (32), the plurality of third reinforcing ribs (31) are arranged along a third direction, the connecting ribs (32) connect two adjacent third reinforcing ribs (31) along a third direction, and the connecting ribs (32) and the third reinforcing ribs (31) define a plurality of third energy-absorbing cavities (301).

12. The battery device according to claim 11, characterized in that, The battery frame (100) includes two first side beams (101) and two second side beams (102). The two first side beams (101) are arranged along a first direction, and the two second side beams (102) are arranged along a second direction. The two ends of the first side beams (101) are respectively connected to the ends of the two second side beams (102) to enclose and form the receiving cavity. The third protective component (30) is connected to the first side beam (101).

13. The battery device according to claim 12, characterized in that, The first side beam (101) and the third protective component (30) are integrally formed parts; And / or, the battery device (1) further includes a power distribution assembly, wherein the first side beam (101) has a mounting cavity (1021) communicating with the interior of the battery frame (100), the mounting cavity (1021) being used to mount the power distribution assembly; And / or, the first side beam (101) and the third protective member (30) together define an exhaust passage (61) communicating with the receiving cavity, and an explosion-proof valve (62) is provided at the outlet (612) of the exhaust passage (61) to open under set conditions to exhaust gas. The inlet (611) of the exhaust channel (61) is located on the first side wall of the first side beam (101), and the outlet (612) of the exhaust channel (61) is located on the second side wall of the third protective member (30). The extension direction of the first side wall intersects with the extension direction of the second side wall. And / or, the bottom surface of the third protective member (30) has a receiving recess (64) recessed toward the exhaust channel, the receiving recess (64) being connected to the outlet (612), the explosion-proof valve (62) being disposed in the receiving recess (64), and the explosion-proof valve (62) not extending beyond the bottom surface.

14. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1-13.

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