Falling buffer assembly and battery pack assembly

Abstract

The utility model relates to the technical field of batteries, in particular to a falling buffer assembly and a battery pack assembly.The falling buffer assembly comprises a buffer component, the buffer component comprises a bottom buffer part and a side buffer part which are connected, and the bottom buffer part comprises a first contact part, an upward inclined part and a second contact part which are connected in sequence; the first contact part is connected with the side buffer part, the second contact part is used for being fixed to the bottom wall of the product and is higher than the first contact part in the vertical direction, and deformation spaces exist between the upward inclined part and the bottom wall of the product and between the first contact part and the bottom wall of the product in the vertical direction; and the side buffer part is connected with the side wall of the product. Therefore, in the falling impact process of the battery pack, the counter-acting force of the ground is transmitted to the battery pack through the buffer component and the connecting component, and in the process, the buffer component and the connecting component deform due to external force, so that the impact on the battery pack is relieved, and the safety of the battery pack is ensured.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a drop cushioning component and a battery pack component. Background Technology

[0002] The battery cell modules inside the battery pack are fixed to the base plate of the casing with structural adhesive. When the battery pack is dropped from a plane at a height of 1.2m (or 2m) according to national or overseas transportation standards, the impact load is transmitted in the following direction during the impact: ground - base plate of the battery pack - structural adhesive - battery cell. Due to the small thickness of the structural adhesive and its limited cushioning capacity, the battery cell will ultimately bear a very large impact load. When the battery cell is subjected to a large impact, it may cause deformation and damage to the cell itself, and the welding between the terminal and the copper busbar may break and fail. In severe cases, it may cause the battery cell to catch fire and explode. Utility Model Content

[0003] The purpose of this application is to provide a drop cushioning component and a battery pack assembly, which to a certain extent solves the technical problems existing in the prior art where, when a battery pack hits the ground, the battery cell may deform and be damaged, the welding of the terminal and the copper busbar may break and fail, and in severe cases, the battery cell may catch fire and explode.

[0004] This application provides a drop cushioning assembly, including a cushioning member. The cushioning member includes a bottom cushioning portion and a side cushioning portion connected together. The bottom cushioning portion includes a first contact portion, an upwardly inclined portion, and a second contact portion connected in sequence. The first contact portion is connected to the side cushioning portion. The second contact portion is fixed to the bottom wall of the product and is set higher than the first contact portion in the vertical direction. There is a deformation space in the vertical direction between the upwardly inclined portion and the first contact portion and the bottom wall of the product. The side cushioning portion is connected to the side wall of the product.

[0005] In the above technical solution, the drop buffer assembly further includes a connecting member, which is used to fix the product to the side wall, and the side buffer portion is connected to the connecting member.

[0006] In any of the above technical solutions, the connecting member is further provided with a tearing groove.

[0007] In any of the above technical solutions, the connecting member further includes a body, a transition part, a mounting part, and a connecting part; wherein, the body is disposed against the side wall of the product, the mounting part is connected to the body through the transition part, and an installation space is formed between the mounting part and the side wall of the product, and a portion of the side buffer part extends into the installation space and is fixedly connected to the mounting part.

[0008] The connecting portions are provided on both opposite sides of the main body, and the connecting portions are connected to the side wall of the product. At least one of the connecting portions is connected to the main body and a tear groove is formed therein. The extension line of the tear groove along its length direction is located outside the adapter portion and the mounting portion.

[0009] In any of the above technical solutions, the main body, the adapter, and the mounting part are connected sequentially from top to bottom along the vertical direction, and the connecting part is disposed on the side of the main body along the horizontal direction.

[0010] In any of the above technical solutions, the main body, the adapter, the mounting part, and the connecting part are further integrated into a single structure.

[0011] In any of the above technical solutions, the connecting member is further connected to the product via a first fastening member.

[0012] In any of the above technical solutions, the side buffer portion and the connecting member are further detachably connected by a second fastening member.

[0013] In any of the above technical solutions, the connecting member is further described as a plate-like structure.

[0014] In any of the above technical solutions, the connecting member is further made of metal.

[0015] In any of the above technical solutions, the tearing groove is further provided along the vertical direction.

[0016] In any of the above technical solutions, the side buffer portion further includes a main body, an auxiliary transition portion, an auxiliary connecting portion, and a bending abutment portion; wherein, the auxiliary connecting portion is connected to the main body through the auxiliary transition portion, and the auxiliary connecting portion is connected to the side wall of the product; the bending abutment portion is connected to the main body and abuts against the side wall of the product.

[0017] In any of the above technical solutions, the auxiliary connecting part, the auxiliary transition part, and the main body are arranged sequentially from top to bottom along the vertical direction.

[0018] In any of the above technical solutions, the bending abutment portion is further provided on both opposite sides of the main body along the horizontal direction.

[0019] In any of the above technical solutions, the bent abutment portion is further L-shaped.

[0020] In any of the above technical solutions, the second contact portion is further detachably connected to the bottom wall of the product via a third fastening member.

[0021] In any of the above technical solutions, the side buffer portion is further provided with weight-reducing holes.

[0022] In any of the above technical solutions, the bottom buffer portion and the side buffer portion are both plate-shaped structures.

[0023] In any of the above technical solutions, the bottom buffer portion and the side buffer portion are further integrated into a single structure.

[0024] In any of the above technical solutions, the buffer component is further made of metal.

[0025] In any of the above technical solutions, the first contact portion and the side buffer portion are further connected by an arc-shaped curvature.

[0026] This application also provides a battery pack assembly, including a battery pack and the drop cushioning assembly described in any of the above technical solutions, wherein the second contact portion of the cushioning member is fixed to the bottom wall of the battery pack, and both the upwardly inclined portion and the first contact portion have a deformation space in the vertical direction between themselves and the bottom wall of the battery pack; the side cushioning portion is connected to the side wall of the product. Therefore, it possesses all the beneficial technical effects of this drop cushioning assembly, which will not be elaborated further here.

[0027] In the above technical solution, further, along the first preset direction, multiple drop buffer components are provided on both opposite sides of the battery pack, and the multiple drop buffer components on each side are arranged sequentially and evenly at intervals along a direction perpendicular to the first preset direction.

[0028] Compared with the prior art, the beneficial effects of this application are as follows:

[0029] During the impact of a battery pack drop, the ground reaction force is transferred to the battery pack through the buffer components and connecting components. During the load transfer process, the buffer components and connecting components also deform due to the external force. From an energy perspective, part of the potential energy of the battery pack drop is converted into the deformation energy of the buffer components and connecting components, and the remaining energy is transferred to the battery pack, thus mitigating the impact on the battery pack. Therefore, the drop buffer component has an energy absorption and buffering effect. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the battery pack assembly provided in an embodiment of this application;

[0032] Figure 2 for Figure 1 A partially enlarged structural diagram;

[0033] Figure 3 This is another structural schematic diagram of the battery pack assembly provided in an embodiment of this application;

[0034] Figure 4 for Figure 3 A partially enlarged structural diagram;

[0035] Figure 5 This is another structural schematic diagram of the battery pack assembly provided in an embodiment of this application;

[0036] Figure 6 for Figure 5 A partially enlarged structural diagram;

[0037] Figure 7 This is a schematic diagram of the structure of the drop buffer assembly provided in the embodiments of this application;

[0038] Figure 8 This is another structural schematic diagram of the drop buffer assembly provided in the embodiments of this application;

[0039] Figure 9 This is a schematic diagram of the structure of the buffer component provided in the embodiments of this application;

[0040] Figure 10 Another structural schematic diagram of the buffer component provided in the embodiments of this application;

[0041] Figure 11 Another structural schematic diagram of the buffer component provided in the embodiments of this application;

[0042] Figure 12 This is a schematic diagram of the structure of the connecting member provided in the embodiments of this application;

[0043] Figure 13 This is another structural schematic diagram of the connecting member provided in an embodiment of this application;

[0044] Figure 14This is another structural schematic diagram of the connecting member provided in the embodiments of this application.

[0045] Figure label:

[0046] 1-Buffer component, 11-Bottom buffer part, 111-First contact part, 112-Upward tilting part, 113-Second contact part, 114-Deformation space, 12-Side buffer part, 121-Main body, 122-Auxiliary adapter part, 123-Auxiliary connecting part, 124-Bending abutment part, 125-Weight reduction hole, 13-Second mounting hole, 14-Fourth mounting hole, 2-Connecting component, 21-Main body, 22-Adapter part, 23-Mounting part, 24-Connecting part, 25-Tear groove, 26-First mounting hole, 27-Third mounting hole, 10-Drop buffer assembly, 20-Battery pack. Detailed Implementation

[0047] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0048] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0049] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] The following reference Figures 1 to 14 This application describes a drop-damping assembly and a battery pack assembly according to some embodiments thereof.

[0053] Example 1

[0054] See Figures 1 to 11 As shown, an embodiment of this application provides a drop cushioning assembly 10, including a cushioning member 1. The cushioning member 1 includes a bottom cushioning portion 11 and a side cushioning portion 12 connected to each other. The bottom cushioning portion 11 includes a first contact portion 111, an upwardly inclined portion 112, and a second contact portion 113 connected in sequence. The first contact portion 111 is connected to the side cushioning portion 12. The second contact portion 113 is fixed to the bottom wall of the product and is set higher than the first contact portion 111 in the vertical direction. There is a deformation space 114 between the upwardly inclined portion 112 and the first contact portion 111 and the bottom wall of the product in the vertical direction. The side cushioning portion 12 is connected to the side wall of the product.

[0055] As can be seen from the structure described above, the drop buffer component 10 provided in this application can be applied to the battery pack 20. This will be used as an example in the following description, and the specific shock absorption process is as follows:

[0056] When the battery pack 20 falls and hits the ground, the reaction force f provided by the ground and the downward pressure F of the battery pack 20 act on the buffer member 1 at the same time. Since the pressure F and the ground reaction force f are not collinear and their positions of action are not the same, the downward pressure F and the ground reaction force f cannot be directly canceled out.

[0057] As the battery pack 20 impacts downwards along with the bottom buffer part 11 of the buffer member 1 due to inertia, the upward tilting part 112 of the buffer member 1 deforms, its slope angle decreases, and the gap between the battery pack 20 and the bottom buffer part 11 of the buffer member 1 decreases. At the same time, the deformation of the upward tilting part 112 will generate a reverse force F2 to offset part of the impact and hinder the downward movement of the battery pack 20. In addition, the side of the battery pack 20 is also subjected to an upward lateral reaction force F3 from the side buffer part 12, which also hinders the downward movement of the battery pack 20.

[0058] As can be seen, during the impact of the drop of the battery pack 20, the reaction force of the ground is transmitted to the battery pack 20 through the buffer component 1. During the load transfer, the buffer component 1 also deforms due to the external force. From an energy perspective, part of the potential energy of the drop of the battery pack 20 is converted into the deformation energy of the buffer component 1, and the remaining energy is transmitted to the battery pack 20, thereby mitigating the impact on the battery pack 20. Therefore, this drop buffer component 10 has the function of absorbing energy and buffering, which can effectively avoid the problems of cell damage and breakage failure of the terminal and copper busbar at the welding point, and can also prevent the cell from catching fire, ensuring safety during transportation or use.

[0059] It should be noted that this drop-damping component 10 is not limited to the battery pack 20; it can also be applied to other products to cushion drops and protect them, depending on actual needs. Furthermore, it should be noted that the height of the battery pack 20 is the same as its vertical direction.

[0060] In this embodiment, preferably, as follows: Figure 3 and Figure 4 As shown, the drop cushioning assembly 10 also includes a connecting member 2, which is used to fix the product to the side wall, and the side cushioning part 12 is connected to the connecting member 2.

[0061] As can be seen from the structure described above, when the battery pack 20 is too heavy, the battery pack 20 falls too high, and the design size of the buffer member 1 is limited, the buffering capacity of the deformation of the buffer member 1 alone cannot guarantee the safety of the battery pack 20. In this case, the connecting member 2 can also deform and absorb energy, further ensuring the safety of the battery pack 20.

[0062] In addition, the connecting member 2 is fixed on the battery pack 20 to connect the side buffer part 12 with the connecting member 2, which makes it easier to operate and reduces the number of connection points on the side wall of the product, thus affecting the sealing performance of the battery pack 20.

[0063] Furthermore, preferably, the connecting member 2 is detachably connected to the side wall of the product via the first fastening member. Figure 2 The first fastening member is not shown, but a third mounting hole 27 on the connecting member 2 for mounting the first fastening member is shown, realizing a detachable connection structure. In particular, if the battery pack 20 falls from a height, only the cushioning component needs to be removed or replaced, and the battery pack 20 can still be used, thus saving costs. Of course, it is not limited to this; the connecting member 2 can also be connected to the side wall of the product by a non-detachable connection method, such as welding.

[0064] In this embodiment, preferably, as follows: Figure 2 As shown, the drop cushioning assembly 10 also includes a second fastening member, such as a screw or bolt. Figure 2 The second fastening member is not shown, but a first mounting hole 26 on the connecting member 2 for mounting the second fastening member is shown, correspondingly, as... Figure 8 and Figure 9 As shown, the side buffer portion 12 has a fourth mounting hole 14 for mounting the second fastening member, and the side buffer portion 12 and the connecting member 2 are detachably connected through the second fastening member.

[0065] As can be seen from the structure described above, the side buffer 12 and the connecting member 2 are connected by a second fastening member, such as a screw or bolt, to achieve a detachable connection structure. In particular, when the battery pack 20 falls from a height, the battery pack 20 can still be used simply by removing or replacing the buffer assembly, which saves costs.

[0066] It should be noted that, not limited to the above, the side buffer part 12 and the connecting member 2 can also adopt other connection methods, such as snap-fit ​​or other detachable connection methods, or the side buffer part 12 and the connecting member 2 can adopt non-detachable connection methods, such as welding or gluing, depending on the actual needs.

[0067] Of course, it is not limited to this. Alternatively, the connecting component 2 may not be provided, and the side buffer part 12 may be directly fixed to the side wall of the product. The specific choice depends on the actual needs.

[0068] In this embodiment, preferably, as follows: Figure 7 As shown, the connecting member 2 has a tearing groove 25.

[0069] As can be seen from the structure described above, when the impact energy of the battery pack 20 falling is too large (F3, F4 are too large), the connecting member 2 will tear (shear failure) along the tear groove 25 to absorb most of the impact energy, thereby ensuring the safety of the battery pack 20. It can be seen that the tear groove 25 provides a weak point for the connecting member 2 and controls the position of deformation.

[0070] It should be noted that the tear groove 25 may not be provided on the connecting component 2; the choice should be made according to actual needs.

[0071] In this embodiment, preferably, as follows: Figure 6 , Figure 7 , Figures 12 to 14As shown, the connecting member 2 includes a body 21, a transition part 22, a mounting part 23, and a connecting part 24; wherein, the body 21 is disposed against the side wall of the product, the mounting part 23 is connected to the body 21 through the transition part 22, and an installation space is formed between the mounting part 23 and the side wall of the product, a portion of the structure of the side buffer part 12 extends into the installation space and is fixedly connected to the mounting part 23, and preferably, the side buffer part 12 and the mounting part 23 are detachably connected through the aforementioned second fastening member;

[0072] Connecting portions 24 are provided on both opposite sides of the main body 21, and the connecting portions 24 are connected to the side wall of the product. At least one connecting portion 24 is connected to the main body 21 and a tearing groove 25 is formed therein. The extension line of the tearing groove 25 extending along its length direction, for example, the extension line of the tearing groove 25 extending along the vertical direction, is located outside the adapter portion 22 and the mounting portion 23. Of course, the extension line of the tearing groove 25 extending along its length direction is not limited to being provided along the vertical direction.

[0073] As can be seen from the structure described above, the connecting member 2 is subjected to the downward pulling force F4 of the battery pack 20 and the lateral reaction force F3 provided by the buffer member 1. The points of action are located on their respective bolt holes. Since F3 and F4 are parallel but not collinear, the connecting member 2 will be subjected to shear force. When the impact energy of the battery pack 20 falling is too large (F3 and F4 are too large), the connecting member 2 will tear along the tear groove 25 (shear failure) to absorb most of the impact energy, thereby ensuring the safety of the battery pack 20.

[0074] Furthermore, preferably, the tear groove 25 is arranged in the vertical direction because the downward pulling force F4 from the battery pack 20 and the lateral reaction force F3 provided by the buffer member 1 are both in the vertical direction. Since F3 and F4 are parallel and not collinear, when the tear groove 25 is arranged in the vertical direction, the tear groove 25 in the vertical direction is more likely to be sheared and break. Of course, the tear groove 25 is not limited to the vertical direction, but can also be arranged in the direction that forms an acute angle or an obtuse angle with the vertical direction, depending on the actual needs.

[0075] In this embodiment, preferably, as follows: Figure 7 , Figures 12 to 14 As shown, the main body 21, the adapter 22 and the mounting part 23 are connected sequentially from top to bottom in the vertical direction, and the connecting part 24 is provided on the side of the main body 21 in the horizontal direction to meet the assembly and use requirements, and the tear groove 25 extends in the vertical direction to meet the requirements of composite stress fracture.

[0076] In this embodiment, preferably, as follows: Figures 12 to 14As shown, the main body 21, adapter 22, mounting part 23, and connecting part 24 are an integrated structure. This integrated structure offers high strength and avoids subsequent connection operations, improving production efficiency. However, it is not limited to this; the bottom buffer part 11 and the side buffer part 12 can also be separate structures, which can be connected later by welding or other methods, depending on actual needs.

[0077] In this embodiment, preferably, the connecting member 2 is made entirely of metal, which is capable of deformation and energy absorption. However, this is not the only option; the material of the buffer member 1 can also be selected based on actual needs.

[0078] In this embodiment, preferably, as follows: Figure 12 and Figure 13 As shown, the connecting member 2 is a plate-like structure with a large contact area with the battery pack 20. It can also deform to absorb energy, meet the buffering requirements, save materials, and is easy to process and manufacture, especially through bending and forming. Of course, it is not limited to this.

[0079] In this embodiment, preferably, as follows: Figures 9 to 11 As shown, the side buffer portion 12 includes a main body 121, an auxiliary adapter portion 122, an auxiliary connecting portion 123, and a bending abutment portion 124; wherein, the auxiliary connecting portion 123 is connected to the main body 121 through the auxiliary adapter portion 122, and the auxiliary connecting portion 123 is connected to the side wall of the product, and preferably, the auxiliary connecting portion 123 is detachably connected to the mounting portion 23 of the connecting member 2 through the aforementioned second fastening member; the bending abutment portion 124 is connected to the main body 121 and abuts against the side wall of the product.

[0080] As can be seen from the structure described above, the auxiliary connecting part 123 serves to connect with the mounting part 23 of the connecting member 2, and the bent abutting part 124 abuts against the side wall of the battery pack 20 to improve the rigidity of the side.

[0081] Furthermore, preferably, the auxiliary connecting part 123, the auxiliary transition part 122 and the main body 121 are arranged in a vertical direction and from top to bottom to meet the assembly requirements, and the orientation is regular, which facilitates assembly.

[0082] Furthermore, preferably, the main body 121, the auxiliary adapter 122, the auxiliary connecting part 123, and the bending abutment part 124 are an integral structure, but of course, it is not limited to this.

[0083] In this embodiment, preferably, as follows: Figure 10 As shown, the main body 121 has bent abutment portions 124 on both opposite sides along the horizontal direction, which helps to improve the overall rigidity of the connecting member 2 and prevents the connecting member 2 from tilting. Of course, it is not limited to this.

[0084] In this embodiment, preferably, as follows: Figure 10 As shown, the bent abutment portion 124 is L-shaped, which allows the bent abutment portion 124 to extend from the horizontal side of the main body 121 to the side of the main body 121 closest to the product, facilitating its fit with the side wall of the product. Of course, it is not limited to this.

[0085] In this embodiment, preferably, as follows: Figure 4 As shown, the drop cushioning assembly 10 also includes a third fastening component, such as a screw or bolt. Figure 4 The third fastening member is not shown, but a second mounting hole 13 for mounting the third fastening member is shown on the bottom buffer portion 11, and the second contact portion 113 is detachably connected to the bottom wall of the product via the third fastening member.

[0086] As can be seen from the structure described above, the second contact part 113 and the bottom wall of the product are connected by a third fastening component, such as a screw or bolt, to achieve a detachable connection structure. In particular, when the battery pack 20 falls from a height, the battery pack 20 can still be used by simply removing or replacing the cushioning component, which saves costs.

[0087] It should be noted that, not limited to the above, the second contact part 113 and the bottom wall of the product can also be connected in a non-detachable manner. For example, the second contact part 113 can also be connected to the bottom wall of the product by welding or gluing, depending on the actual needs.

[0088] In this embodiment, preferably, as follows: Figure 9 As shown, the side buffer portion 12 has weight-reducing holes 125, which serve to reduce weight.

[0089] In this embodiment, preferably, as follows: Figures 7 to 14 As shown, both the bottom buffer section 11 and the side buffer section 12 are plate-shaped structures.

[0090] As can be seen from the structure described above, the bottom buffer portion 11 and the side buffer portion 12 of the plate-like structure have a large contact area with the battery pack 20, and can deform to absorb energy, thus meeting the buffering requirements. Furthermore, it saves materials and is convenient to process and manufacture, especially through bending and forming. Of course, it is not limited to this.

[0091] Furthermore, preferably, both the bottom buffer portion 11 and the side buffer portion 12 are made of metal, meaning that the entire buffer member 1 is made of metal, allowing it to deform and absorb energy. Of course, this is not the only option; the material of the buffer member 1 can be selected according to actual needs.

[0092] In this embodiment, preferably, as follows: Figures 9 to 11As shown, the bottom buffer section 11 and the side buffer section 12 are an integral structure. The integral structure has high strength and avoids subsequent connection operations, thus improving production efficiency. Of course, it is not limited to this; the bottom buffer section 11 and the side buffer section 12 can also be separate structures, which can be connected later by welding or other methods, depending on the actual needs.

[0093] In this embodiment, preferably, as follows: Figures 9 to 11 As shown, the first contact portion 111 and the side buffer portion 12 are connected by an arc shape to avoid sharp corners, thereby preventing stress concentration and interference with other structures. Of course, this is not the only benefit.

[0094] The detailed working principle of the drop buffer assembly 10 provided in this application is as follows:

[0095] The buffer member 1 is connected to the battery pack 20 through its bottom buffer part 11 and to the connecting member 2 on the side of the battery pack 20 through its side buffer part 12. Both sides of the side buffer part 12 along the horizontal direction are designed with bent abutment parts 124 to improve the rigidity of the side. There is an upward inclined part 112 between the first contact part 111 and the second contact part 113 at the bottom. When the battery pack 20 falls and hits the ground, the reaction force f provided by the ground and the downward pressure F of the battery pack 20 act on the buffer member 1 at the same time. Since the pressure F and the ground reaction force f are not collinear and their positions of action are not the same, the downward pressure F and the ground reaction force f cannot be directly canceled out.

[0096] As the battery pack 20 impacts downwards along with the bottom buffer part 11 of the buffer member 1 due to inertia, the upward tilting part 112 at the bottom of the buffer member 1 will deform, its slope angle will decrease, the gap between the battery pack 20 and the bottom of the buffer member 1 will decrease, and the deformation of the upward tilting part 112 will generate a reverse force F2 to offset part of the impact and prevent the battery pack 20 from moving downwards.

[0097] In addition, due to the inertia of the battery pack 20, the connecting member 2 moves downward together. The connecting member 2 and the buffer member 1 are connected by a second fastening member, such as a screw or bolt. The ground hinders the movement of the buffer member 1. Therefore, at the connection position, the connecting member 2 is simultaneously subjected to the downward pulling force F4 of the battery pack 20 and the upward lateral reaction force F3 of the buffer member. The lateral reaction force F3 also hinders the downward movement of the battery pack 20.

[0098] As can be seen from the above, during the impact of the battery pack 20 falling, the reaction force from the ground is transmitted to the battery pack 20 through the buffer component 1 and the connecting component 2. During the load transmission process, the buffer component 1 and the connecting component 2 also deform due to the external force. From an energy perspective, part of the potential energy of the falling battery pack 20 is converted into the deformation energy of the buffer component 1 and the connecting component 2, and the remaining energy is transmitted to the battery pack 20, thus mitigating the impact on the battery pack 20. Therefore, the drop buffer component 10 has an energy absorption and buffering effect.

[0099] As mentioned earlier, the buffer component 1 absorbs energy through the deformation of its bottom inclined surface (the upwardly tilted portion 112) under stress (resulting in a smaller tilt angle). However, the energy absorbed by the buffer component 1 is limited, and its maximum absorbable energy is controlled by the design angle of the inclined surface and the bottom gap of the battery pack 20. When the battery pack 20 has an excessive mass, falls from an excessive height, and the design dimensions of the buffer component 1 are limited, the buffering capacity of the buffer component 1 alone cannot guarantee the safety of the battery pack 20. In this case, the deformation and energy absorption of the connecting component 2 are combined to ensure the safety of the battery pack 20.

[0100] Furthermore, the two sides of the connecting member 2 are fixed to the side of the battery pack 20 by the first fastening member such as screws or bolts. The lower flange, i.e. the mounting part 23, is connected to the auxiliary connecting part 123 of the buffer member 1 by the second fastening member such as screws or bolts. A tearing groove 25 is designed at the position where the body 21 is flush with the flange.

[0101] From the mechanical analysis, it can be seen that the connecting member 2 is subjected to the downward pulling force F4 of the battery pack 20 and the lateral reaction force F3 provided by the buffer member 1. The points of application are located on their respective bolt holes. Since F3 and F4 are parallel and not collinear, the connecting member 2 will be subjected to shear force. When the impact energy of the battery pack 20 falling is too large (F3 and F4 are too large), the connecting member 2 will tear along the tear groove 25 (shear failure).

[0102] The function of the tear groove 25 is to provide a definite weak point for the connecting member 2 and control the deformation location. If the connecting member 2 is not designed with the tear groove 25, the shear forces formed by F3 and F4 will only cause the connecting member 2 to deform. However, the connecting member 2 has higher stiffness relative to the battery pack 20 housing. In addition, the energy absorbed by deformation is far less than the energy absorbed by the breakage of the parts. In the end, most of the impact energy will still be transferred to the battery pack 20, causing large deformation in a local area on the side of the battery pack 20 housing. With the design of the tear groove 25, it can be ensured that the connecting member 2 will tear along the tear groove 25 before the battery pack 20 housing undergoes large deformation, so as to absorb most of the impact energy and thus ensure the safety of the battery pack 20. (Similar to a circuit fuse, when the circuit current is too large, the fuse will blow first to ensure the safety of other electrical components. The fuse can be replaced after it blows. Similarly, in this design, when the battery pack 20 is dropped, the connecting member 2 is sacrificed (torn) to ensure the safety of the battery pack 20. After the drop, the buffer member 1 and the connecting member 2 can also be replaced.)

[0103] It should be noted that in this embodiment, only the buffer member 1 may be included, without the need for the connecting member 2. Instead, the side buffer part 12 of the buffer member 1 is directly fixed to the side wall of the product, such as the battery pack 20. The specific choice depends on the actual needs.

[0104] Example 2

[0105] See Figures 1 to 6 As shown, Embodiment 2 of this application also provides a battery pack assembly, including the drop buffer assembly 10 described in Embodiment 1 above. Therefore, it has all the beneficial technical effects of the drop buffer assembly 10. The same technical features and beneficial effects will not be repeated here.

[0106] In this embodiment, preferably, as follows: Figures 1 to 6 As shown, the battery pack assembly also includes a battery pack 20. The second contact portion 113 of the buffer member 1 is fixed on the bottom wall of the battery pack 20. The upwardly inclined portion 112 and the first contact portion 111 both have a deformation space 114 in the vertical direction between them and the bottom wall of the battery pack 20. The side buffer portion 12 is connected to the side wall of the product.

[0107] As can be seen from the structure described above, the battery pack assembly provided in this application is equipped with a drop buffer assembly 10, which can mitigate the impact of a drop, absorb the impact energy, and ensure the safety of the battery pack 20. Moreover, the drop buffer assembly 10 is detachable. When the battery pack 20 falls from a height, only the buffer assembly needs to be removed or replaced, and the battery pack 20 can still be used.

[0108] Further, preferably, such as Figure 5As shown, along the first preset direction, multiple drop buffer components 10 are provided on both opposite sides of the battery pack 20, and the multiple drop buffer components 10 on each side are arranged sequentially and evenly at intervals along a direction perpendicular to the first preset direction, so as to play a role in uniform buffering. Of course, it is not limited to this; the number of drop buffer components 10 on each side can also be one. In addition, it should be noted that it is not limited to providing drop buffer components 10 on both sides of the battery pack 20 at the same time; it is also possible to provide drop buffer components 10 only on one side of the battery pack 20.

[0109] Further, preferably, such as Figure 5 As shown, the battery pack 20 is rectangular, and the first preset direction is the width direction of the battery pack 20. Of course, it is not limited to this. The first preset direction can also be the length direction of the battery pack 20, etc., depending on the actual needs.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A drop-damping component, characterized in that, The product includes a cushioning component comprising a bottom cushioning portion and a side cushioning portion connected to each other. The bottom cushioning portion includes a first contact portion, an upwardly inclined portion, and a second contact portion connected in sequence. The first contact portion is connected to the side cushioning portion. The second contact portion is fixed to the bottom wall of the product and is positioned vertically higher than the first contact portion. Both the upwardly inclined portion and the first contact portion have a deformation space in the vertical direction between them and the bottom wall of the product. The side cushioning portion is connected to the side wall of the product.

2. The drop buffer assembly according to claim 1, characterized in that, The drop cushioning assembly further includes a connecting member, which is used to fix the product to the side wall, and the side cushioning portion is connected to the connecting member.

3. The drop buffer assembly according to claim 2, characterized in that, The connecting member has a tearing groove.

4. The drop buffer assembly according to claim 3, characterized in that, The connecting component includes a body, a transition part, a mounting part, and a connecting part; wherein, the body is disposed against the side wall of the product, the mounting part is connected to the body through the transition part, and an installation space is formed between the mounting part and the side wall of the product, and a portion of the side buffer part extends into the installation space and is fixedly connected to the mounting part. The connecting portions are provided on both opposite sides of the main body, and the connecting portions are connected to the side wall of the product. At least one of the connecting portions is connected to the main body and a tear groove is formed therein. The extension line of the tear groove along its length direction is located outside the adapter portion and the mounting portion.

5. The drop-damping assembly according to claim 4, characterized in that, The main body, the adapter, and the mounting part are connected sequentially from top to bottom along the vertical direction, and the connecting part is located on the side of the main body along the horizontal direction; and / or The main body, the adapter, the mounting part, and the connecting part are an integral structure.

6. The drop buffer assembly according to claim 2, characterized in that, The connecting member is connected to the product via a first fastening member; and / or The side buffer portion is detachably connected to the connecting member via a second fastening member; and / or The connecting member is a plate-like structure; and / or The connecting component is made of metal.

7. The drop-damping assembly according to claim 3, characterized in that, The tearing groove is set in the vertical direction.

8. The drop buffer assembly according to claim 1, characterized in that, The side buffer section includes a main body, an auxiliary adapter, an auxiliary connecting section, and a bending abutment section; wherein, the auxiliary connecting section is connected to the main body through the auxiliary adapter and is connected to the side wall of the product; the bending abutment section is connected to the main body and abuts against the side wall of the product.

9. The drop buffer assembly according to claim 8, characterized in that, The auxiliary connecting part, the auxiliary adapter part, and the main body are arranged sequentially from top to bottom along a vertical direction; and / or The main body is provided with bent abutment portions on opposite sides along the horizontal direction; and / or The bent abutment part is L-shaped.

10. The drop-damping assembly according to any one of claims 1 to 9, characterized in that, The second contact portion is detachably connected to the bottom wall of the product via a third fastening member; and / or The side buffer section is formed with weight-reducing holes; and / or Both the bottom buffer section and the side buffer section are plate-shaped structures; and / or The bottom buffer section and the side buffer section are an integral structure; and / or The buffer component is made of metal; and / or The first contact portion and the side buffer portion are connected by an arc-shaped curvature.

11. A battery pack assembly, characterized in that, The product includes a battery pack and a drop cushioning assembly as described in any one of claims 1 to 10; wherein the second contact portion of the cushioning member is fixed to the bottom wall of the battery pack, and both the upwardly inclined portion and the first contact portion have a deformation space in the vertical direction between them and the bottom wall of the battery pack; the side cushioning portion is connected to the side wall of the product.

12. The battery pack assembly according to claim 11, characterized in that, Along a first preset direction, multiple drop buffer components are provided on opposite sides of the battery pack, and the multiple drop buffer components on each side are arranged sequentially and evenly at intervals along a direction perpendicular to the first preset direction.

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