Frame of battery tray, battery tray, battery pack and electric equipment

Abstract

The utility model relates to a frame of a battery tray, the battery tray, a battery pack and electric equipment, the frame comprises a frame main body, a mounting rack and an energy absorption rack, the mounting rack and the energy absorption rack protrude out of the frame main body and are located on the same surface of the frame main body, the energy absorption rack is located above the mounting rack, and the energy absorption rack is located above the mounting rack. And the energy absorption frame is configured to deform prior to the mounting frame and the frame main body under a preset collision condition. Through the technical scheme, the frame provided by the utility model can reduce the damage to the battery pack when the vehicle body is collided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery pack trays, and specifically, to a frame of a battery tray, a battery tray, a battery pack, and an electrical device. Background Art

[0002] When a vehicle has a side collision accident, due to the small space on the side of the vehicle body and the relatively compact structure between various structures, when the side of the vehicle body is impacted, it is easy to squeeze the battery pack, resulting in damage and fire of the battery pack, and thus endangering the safety of the driver and passengers.

[0003] Therefore, it is urgent to reduce the damage to the battery pack when the vehicle body is collided. Summary of the Utility Model

[0004] The purpose of the present disclosure is to provide a frame of a battery tray, a battery tray, a battery pack, and an electrical device, which can reduce the damage to the battery pack when the vehicle body is collided.

[0005] To achieve the above purpose, the present disclosure provides a frame of a battery tray. The frame includes a frame main body, a mounting frame, and an energy absorption frame. The mounting frame and the energy absorption frame protrude from the frame main body and are located on the same surface of the frame main body. The energy absorption frame is located above the mounting frame, and the energy absorption frame is configured to deform prior to the mounting frame and the frame main body under preset collision conditions.

[0006] Optionally, the stiffness of the energy absorption frame, the stiffness of the mounting frame, and the stiffness of the frame main body increase in sequence.

[0007] Optionally, the frame main body, the mounting frame, and the energy absorption frame respectively have cross-sections in a direction perpendicular to the length direction of the frame. The moment of inertia of the cross-section of the energy absorption frame, the moment of inertia of the cross-section of the mounting frame, and the moment of inertia of the cross-section of the frame main body increase in sequence.

[0008] Optionally, the energy absorption frame is connected to the frame main body and forms a cavity. The energy absorption frame is provided with a weak part to guide the energy absorption frame to deform towards the frame main body.

[0009] Optionally, the weak part is configured as a groove, and the groove extends along the length direction of the energy absorption frame and depresses towards the cavity.

[0010] Optionally, the weak part is configured as a plurality of openings, and the plurality of openings are arranged at intervals along the length direction of the energy absorption frame.

[0011] Optionally, in the direction away from the frame main body, the wall thickness of the energy absorption frame gradually decreases or the wall thickness of the energy absorption frame first gradually decreases and then gradually increases, and the part with the smallest wall thickness of the energy absorption frame is configured as the weak part.

[0012] Optionally, the energy-absorbing frame includes a first plate body and two second plate bodies, and the two second plate bodies are respectively connected to the first plate body and the frame body to enclose the cavity.

[0013] Optionally, the distance between the two second plate bodies gradually decreases toward the side away from the frame body, and the thicknesses of the second plate bodies are the same or gradually decrease toward the direction away from the frame body.

[0014] Optionally, the distance between the two second plate bodies gradually increases toward the side away from the frame body, and the thickness of the second plate body gradually decreases toward the direction away from the frame body.

[0015] Optionally, the cross-sectional shape of the energy-absorbing frame in the direction perpendicular to the length of the frame is configured as a cone.

[0016] Optionally, the cone angle of the energy-absorbing frame is 8°.

[0017] Optionally, the thicknesses of the second plate bodies are the same, and the thickness of the second plate body is 1 mm to 4 mm.

[0018] According to a second aspect of the present disclosure, there is provided a battery tray, which includes a bottom plate and the frame of the battery tray as described above, and the frame is arranged around the bottom plate.

[0019] According to a third aspect of the present disclosure, there is provided a battery pack, which includes the battery tray as described above.

[0020] According to a fourth aspect of the present disclosure, there is provided an electrical device, which includes the battery pack as described above.

[0021] Through the above technical solutions, in the frame of the battery tray provided by the present disclosure, both the mounting frame and the energy-absorbing frame protrude from one side of the frame body. Among them, the mounting frame is located below the energy-absorbing frame and is used for the overall installation connection of the battery pack and the electrical device. When the frame of the battery tray provided by the present disclosure is applied to a vehicle, under preset collision conditions (when the side of the vehicle body is impacted), the energy-absorbing frame deforms prior to the mounting frame and the frame body. When the energy-absorbing frame deforms, it can absorb the impact on the vehicle body, thereby reducing the impact energy acting on the frame body, further reducing or even preventing the frame from invading the battery cells, reducing the damage to the battery pack when the vehicle body is collided, and solving the problem that the damage to the battery pack caused by the collision of the vehicle body affects the driving safety.

[0022] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0023] The accompanying drawings are used to provide a further understanding of the present disclosure and form a part of the specification. Together with the following detailed description, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the accompanying drawings:

[0024] Figure 1 is a schematic structural view of the battery tray provided by the present disclosure;

[0025] Figure 2 is a schematic structural view of the frame of the battery tray provided by the first embodiment of the present disclosure;

[0026] Figure 3 is a schematic structural view of the frame of the battery tray provided by the second embodiment of the present disclosure;

[0027] Figure 4 is a schematic structural view of the frame of the battery tray provided by the third embodiment of the present disclosure;

[0028] Figure 5 is a schematic structural view of the frame of the battery tray provided by the fourth embodiment of the present disclosure;

[0029] Figure 6 is a schematic structural view of the frame of the battery tray provided by the fifth embodiment of the present disclosure;

[0030] Figure 7 is a schematic structural view of the frame of the battery tray provided by the sixth embodiment of the present disclosure;

[0031] Figure 8 is a schematic structural view of the frame of the battery tray provided by the seventh embodiment of the present disclosure.

[0032] Explanation of reference numerals

[0033] 1. Frame body; 11. Reinforcing rib; 2. Mounting frame; 3. Energy absorption frame; 31. Cavity; 32. Weak part; 321. Groove; 322. Opening; 33. First plate body; 34. Second plate body. Detailed description of the specific implementation mode

[0034] The following provides a detailed description of the specific implementation mode of the present disclosure in conjunction with the accompanying drawings. It should be understood that the specific implementation mode described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0035] In this disclosure, unless otherwise stated, the orientation terms such as "upper" and "lower" generally refer to "upper" and "lower" relative to each other in the direction of gravity when the corresponding components are in use. The terms "first", "second", etc. used are to distinguish one element from another and do not have an order or importance. In the following description, when referring to the drawings, unless otherwise explained, the same reference numerals in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate this disclosure and should not be construed as a limitation of this disclosure.

[0036] According to a specific embodiment of the present disclosure, with reference to Figures 1 to 8 as shown, a border of a battery tray is provided. The border includes a border main body 1, a mounting frame 2, and an energy-absorbing frame 3. The mounting frame 2 and the energy-absorbing frame 3 protrude from the border main body 1 and are located on the same surface of the border main body 1. The energy-absorbing frame 3 is located above the mounting frame 2, and the energy-absorbing frame 3 is configured to deform prior to the mounting frame 2 and the border main body 1 under preset collision conditions.

[0037] Through the above technical solution, in the border of the battery tray provided by the present disclosure, both the mounting frame 2 and the energy-absorbing frame 3 protrude from one side of the border main body 1. Among them, the mounting frame 2 is located below the energy-absorbing frame 3 and is used for the overall installation connection of the battery pack with the electrical equipment. When the border of the battery tray provided by the present disclosure is applied to a vehicle, under preset collision conditions (when the side of the vehicle body is impacted), the energy-absorbing frame 3 deforms prior to the mounting frame 2 and the border main body 1. When the energy-absorbing frame deforms, it can absorb the impact on the vehicle body, thereby reducing the impact energy acting on the border main body 1, and further reducing or even preventing the border from invading towards the battery cell direction, reducing the damage to the battery pack when the vehicle body is collided, and solving the problem that the damage to the battery pack caused by the collision of the vehicle body affects the driving safety.

[0038] As a vehicle protection measure, passive protection technology mainly dissipates the impact energy generated by a collision through the crashworthiness of the vehicle's own structure and reduces damages caused by secondary collisions through internal design. The present disclosure absorbs the impact energy through the structural plastic deformation of the energy-absorbing frame on the border of the battery tray, minimizing the safety threat of the impact energy to the battery pack and ultimately achieving the purpose of protecting passengers. When a high-speed collision occurs, relying solely on the energy absorption of the vehicle frame cannot completely dissipate the impact energy. As the energy absorption of the vehicle frame ends and reaches the shear failure threshold, the preset energy-absorbing frame on the upper part of the border of the battery tray begins to undergo plastic deformation to absorb the impact energy. Each part absorbs energy in a stable, reliable, and orderly manner in sequence to reduce the impact effect, thereby ensuring an effective survival space in the passenger area and the driver's cab, maximizing the protection of the safety of the occupants, and reducing the collision impact acceleration within the allowable range and minimizing the injuries to the occupants caused by secondary collisions.

[0039] In the present disclosure, the mounting bracket 2 is provided at the lower part of the frame body 1 and the connection position of the mounting bracket 2 is close to the bottom plate of the battery tray. Therefore, when a collision occurs, the upper part of the frame body 1 is more likely to deform and turn inward towards the battery cell. Through the above arrangement, the energy absorption bracket 3 provided above the mounting bracket 2 can deform preferentially, thus solving the problem that the upper part of the frame body 1 is likely to deform and turn inward to invade the battery cell when the vehicle body is collided.

[0040] Here, it should be explained that the above "preset collision conditions" can refer to the conditions when the vehicle body is side-collided, or can refer to the conditions when the vehicle body is front-collided, or can also refer to the conditions when the vehicle body is rear-collided. In order to reduce the damage to the battery pack under different direction collision conditions of the vehicle, it is possible that multiple frames in the battery tray can be constructed in the above design manner. In this way, whether the vehicle is side-collided, front-collided or rear-collided, the energy absorption bracket 3 in the frame of the battery tray can deform prior to the mounting bracket 2 and the frame body 1, thereby reducing or even preventing the frame from invading towards the battery cell, and further reducing the damage to the battery pack when the vehicle body is collided.

[0041] In the present disclosure, in order to enable the energy absorption bracket 3 to deform prior to the mounting bracket 2 and the frame body 1 under the preset collision conditions, the structural strength of the energy absorption bracket 3 can be designed to be weaker than the structural strength of the mounting bracket 2 and the structural strength of the frame body 1, that is, the structural strength of the energy absorption bracket 3, the structural strength of the mounting bracket 2 and the structural strength of the frame body 1 increase in sequence. In this embodiment, the energy absorption bracket 3 can be designed to be made of a plastic material, while the mounting bracket 2 and the frame body 1 can be made of a rigid material. It is also possible that from the aspect of structural design, the structural strength of the energy absorption bracket 3 is designed to be weaker than the structural strength of the mounting bracket 2 and the structural strength of the frame body 1. The present disclosure does not make specific limitations on this.

[0042] In other embodiments, the stiffness of the energy absorption bracket 3, the stiffness of the mounting bracket 2 and the stiffness of the frame body 1 can also be designed to increase in sequence. Through such a design, on the one hand, it can ensure that the energy absorption bracket 3 deforms prior to the mounting bracket 2 and the frame body 1, and on the other hand, the maximum stiffness of the frame body 1 itself can also ensure that the deformation amount is the smallest when being impacted, thereby reducing the amount of intrusion of the frame towards the battery cell when being impacted, and further reducing the damage to the battery pack caused by the vehicle body collision.

[0043] Among them, the factors affecting the stiffness of the energy absorption bracket 3, the mounting bracket 2 and the frame body 1 mainly include parameters such as the elastic modulus of the material and the sectional moment of inertia of the structure. During the structural design process, the two parameters of the elastic modulus and the sectional moment of inertia can be selected and adjusted to control the stiffness of the energy absorption bracket 3, the mounting bracket 2 and the frame body 1. The present disclosure does not make specific limitations on this.

[0044] In an exemplary embodiment of the present disclosure, when the energy absorption frame 3, the mounting frame 2, and the frame body 1 are made of the same material, the elastic moduli of the energy absorption frame 3, the mounting frame 2, and the frame body 1 are the same. In this case, the moment of inertia of the cross-section is selected to adjust the stiffness of the energy absorption frame 3, the mounting frame 2, and the frame body 1. Among them, the frame body 1, the mounting frame 2, and the energy absorption frame 3 each have a cross-section in a direction perpendicular to the length of the frame. The moment of inertia of the cross-section of the energy absorption frame 3, the moment of inertia of the cross-section of the mounting frame 2, and the moment of inertia of the cross-section of the frame body 1 can be set to increase in sequence, so as to ensure that the stiffness of the energy absorption frame 3 is the smallest and the stiffness of the frame body 1 is the largest.

[0045] Of course, it is also possible to adjust the elastic moduli of the energy absorption frame 3, the mounting frame 2, and the frame body 1 when the moments of inertia of the cross-sections of the energy absorption frame 3, the mounting frame 2, and the frame body 1 are the same, so that the stiffness of the energy absorption frame 3, the mounting frame 2, and the frame body 1 increases in sequence, thereby ensuring that the stiffness of the energy absorption frame 3 is the smallest and the stiffness of the frame body is the largest.

[0046] In addition, the two parameters of the elastic modulus and the moment of inertia of the cross-section of the energy absorption frame 3, the mounting frame 2, and the frame body 1 can be adjusted simultaneously, so that the stiffness of the energy absorption frame 3, the mounting frame 2, and the frame body 1 increases in sequence, thereby ensuring that the stiffness of the energy absorption frame 3 is the smallest and the stiffness of the frame body is the largest. The present disclosure does not make specific limitations on this.

[0047] In the present disclosure, referring to Figures 1 to 8 As shown, the energy absorption frame 3 can be connected to the frame body 1 and form a cavity 31. The energy absorption frame 3 can be provided with a weak part 32 to guide the energy absorption frame 3 to collapse towards the frame body 1. When the energy absorption frame 3 is subjected to an impact force, the maximum impact force may occur at two moments. One is the critical state when the energy absorption frame 3 just starts to buckle, and the other is when the energy absorption frame 3 is compressed and deformed to the end by the impact. Due to the small structural strength and / or stiffness of the weak part 32, the elastic-plastic buckling strength of the weak part 32 is small. Therefore, the peak value of the collision force when the energy absorption frame 3 starts to buckle can be reduced, thereby reducing the maximum impact force and reducing the intrusion amount of the frame body 1 into the battery cell part.

[0048] In the present disclosure, the weak part 32 can be designed arbitrarily according to actual needs, and the present disclosure does not make specific limitations on this.

[0049] In an exemplary embodiment of the present disclosure, referring to Figure 3 and Figure 4As shown, the weak part 32 can be configured as a groove 321. The groove 321 extends along the length direction of the energy absorption frame 3 and is recessed towards the cavity 31. Through this setting, the groove 321 can guide the folding deformation of the energy absorption frame 3 when the energy absorption frame 3 is impacted. That is, at the beginning of the impact, stress concentration occurs at the groove 321 on the energy absorption frame 3. As the impact process continues, the groove 321 first undergoes collapse and absorbs impact energy, and then the entire energy absorption frame 3 deforms to absorb the impact energy. Among them, the generation of each fold can be regarded as a result of compressive buckling deformation. The energy generated by the impact force is transformed into the energy absorbed by the deformation of the entire energy absorption frame. Therefore, the increase in the number of folds means that the overall energy absorption of the energy absorption frame will also increase, thereby greatly improving the collision characteristics of the frame provided by the present disclosure.

[0050] In this embodiment, the groove 321 can be set to various shapes including V-shaped and circular, and the present disclosure does not make specific limitations on this. At the same time, to ensure the guiding effect, the depth of the groove 321 can be set to be greater than twice the wall thickness of the energy absorption frame 3, and the number of the grooves 321 can also be set to multiple, which can be specifically determined according to the size of the energy that needs to be absorbed in a preset situation. The present disclosure does not make specific limitations on this.

[0051] In another exemplary embodiment of the present disclosure, refer to Figure 5 As shown, the weak part 32 is configured as a plurality of openings 322. The plurality of openings 322 are arranged at intervals along the length direction of the energy absorption frame 3. Through this setting, the overall stiffness of the energy absorption frame 3 can be reduced to ensure that the energy absorption frame 3 can preferentially undergo collapse and absorb energy. In this embodiment, the size of the openings 322 and the spacing between each opening 322 can be limited according to actual needs, so as to ensure that the energy absorption frame 3 preferentially undergoes collapse when impacted, and at the same time meet the strength requirements for daily use.

[0052] In another exemplary embodiment of the present disclosure, refer to Figure 7 and Figure 8 As shown, in the direction away from the frame body 1, the wall thickness of the energy absorption frame 3 can gradually decrease or the wall thickness of the energy absorption frame 3 can first gradually decrease and then gradually increase. The part with the smallest wall thickness of the energy absorption frame 3 is configured as the weak part 32.

[0053] In the above - mentioned manner, when the wall thickness of the energy - absorbing frame 3 gradually decreases in the direction away from the frame main body 1, the weak part 32 is formed at a position far from the frame main body 1; when the wall thickness of the energy - absorbing frame 3 first gradually decreases and then gradually increases, the weak part 32 is formed at a position approximately in the middle of the energy - absorbing frame 3. When a collision occurs, the deformation preferentially occurs at the weak part 32. Since there is still a certain distance between the formation position of the weak part 32 and the frame main body 1, after the energy - absorbing frame 3 deforms, it will not immediately contact the frame main body 1. Instead, the energy - absorbing frame 3 collapses, thereby reducing the energy directly acting on the frame main body 1 and reducing the intrusion amount of the frame main body 1 towards the battery cell.

[0054] In the specific embodiments provided by the present disclosure, the energy - absorbing frame 3 can be designed arbitrarily according to actual needs. In one embodiment, referring to Figures 6 to 8 As shown, the energy - absorbing frame 3 can include a first plate body 33 and two second plate bodies 34. The two second plate bodies 34 are respectively connected to the first plate body 33 and the frame main body 1 to enclose a cavity 31. When the energy - absorbing frame 3 is impacted, the first plate body 33 serves as the force - receiving surface, and the two second plate bodies 34 serve as supports. The weak part 32 can be formed on the second plate body 34. When an impact occurs, the second plate body 34 deforms preferentially and absorbs energy. Among them, in Figures 6 to 8 In the embodiment shown, the moment of inertia of the cross - section of the energy - absorbing frame 3 Among them, in this embodiment, the energy - absorbing frame 3 has a cross - section in the frame length direction. B is the sum of the width of the first plate body 33 and the wall thicknesses of the two second plate bodies 34 at the end of the first plate body 33, b is the width of the inner wall of the first plate body 33, H is the distance between the outer surface of the first plate body 33 and the frame main body 1, and h is the distance between the inner wall of the first plate body 33 and the frame main body 1.

[0055] In one embodiment provided by the present disclosure, the distance between the two second plate bodies 34 can gradually decrease towards the side away from the frame main body 1, and the thickness of the second plate body 34 is the same or gradually decreases towards the direction away from the frame main body 1. Through the above - mentioned setting, the force - receiving area of the energy - absorbing frame 3 when it is impacted is smaller. Therefore, the force required to reach the yield deformation when it is impacted is smaller, that is, the elastic - plastic buckling strength of the energy - absorbing frame 3 is reduced. Only a smaller collision force is required for the energy - absorbing frame 3 to deform, reducing the peak value of the collision force when the energy - absorbing frame 3 is impacted. At the same time, by setting the thickness of the side of the second plate body 34 away from the frame main body 1 to be thinner, a weak part 32 can be formed on the side of the second plate body 34 away from the frame main body 1.

[0056] In another embodiment, referring to Figure 7As shown, the distance between the two second plate bodies 34 can gradually increase toward the side away from the frame body 1, and the thickness of the second plate body 34 gradually decreases toward the direction away from the frame body 1. At this time, the energy absorption frame 3 is also constructed as a conical structure but has a larger area on the side away from the frame body 1. At the same time, the thinnest part of the second plate body 34 is formed on the side away from the frame body 1, thereby forming a weak part 32 on the side of the second plate body 34 away from the frame body 1. In the present disclosure, by forming the weak part 32 on the side away from the frame body 1, it is ensured that the energy absorption frame 3 has a larger cavity when undergoing collapse, thereby prolonging the collision time and reducing the impact force.

[0057] In the above two embodiments, the shape of the cross-section of the energy absorption frame 3 in the direction perpendicular to the length of the frame can be constructed as a cone. The cone angle of the energy absorption frame 3 can be selected as any suitable design according to the actual use situation, and the present disclosure does not make specific restrictions on this. In an exemplary embodiment of the present disclosure, the cone angle of the energy absorption frame 3 can be set to 8°, that is, the angle between the second plate body 34 and the vertical direction of the first plate body 33 can be set to 8°. At this time, it can be avoided that the cone angle of the energy absorption frame 3 is too large or too small. If the cone angle of the energy absorption frame 3 is too large, the energy absorption frame 3 will be too flat, and at this time, the cavity 31 is too small to effectively provide buffering and energy absorption. If the cone angle of the energy absorption frame 3 is too small, the cross-section of the energy absorption frame 3 will tend to be a rectangular structure, affecting the priority collapse of the energy absorption frame 3.

[0058] In the present disclosure, the thickness of the second plate body 34 can also be selected as any suitable design according to the actual use situation, and the present disclosure does not make specific restrictions on this. In an exemplary embodiment of the present disclosure, the thickness of the second plate body 34 is consistent, and the thickness of the second plate body 34 can be set to 1 mm to 4 mm, ensuring that the thickness of the second plate body 34 is neither too thin nor too thick, meeting the strength requirements of daily use and also being able to achieve priority collapse.

[0059] In the present disclosure, any suitable design can be selected to improve the stiffness of the frame body 1 itself, and the present disclosure does not make specific restrictions on this. In an exemplary embodiment, as shown in Figures 6 to 8 As shown, reinforcing ribs 11 can be provided in the frame body 1 to enhance the stiffness of the frame body 1, reduce the collapse amount of the frame body 1, and at least one reinforcing rib 11 can be provided to be connected to the position where the energy absorption frame 3 is located, so as to be able to support and strengthen the force transmitted from the energy absorption frame 3.

[0060] On the basis of the above technical solutions, the present disclosure also provides a battery tray. The battery tray includes a bottom plate and the frame of the above battery tray. The frame is arranged around the bottom plate. The battery tray provided by the present disclosure also has the above characteristics. To avoid repetition, it will not be elaborated here.

[0061] Based on the above technical solutions, the present disclosure also provides a battery pack, which includes the above-mentioned battery tray. The battery pack provided by the present disclosure also has the above characteristics. To avoid repetition, it will not be elaborated here.

[0062] Based on the above technical solutions, the present disclosure also provides an electrical device, which includes the above-mentioned battery pack. The electrical device provided by the present disclosure also has the above characteristics. To avoid repetition, it will not be elaborated here.

[0063] In the present disclosure, the electrical device can be any suitable electrical device such as a vehicle (e.g., a fuel vehicle, a gas vehicle, or a new energy vehicle, etc.). The present disclosure does not make specific limitations in this regard. In addition, the battery pack provided by the present disclosure can also be applied to electrical devices such as mobile phones, portable devices, and laptop computers, and can also reduce the damage to the battery pack caused by collisions, thereby reducing further damage to electrical devices such as mobile phones, portable devices, and laptop computers.

[0064] Reference Figures 1 to 8 As shown, the specific implementation principle of the embodiment of the present disclosure is: by protruding an installation frame 2 and an energy-absorbing frame 3 on the side of the frame body 1, where the installation frame 2 is arranged above the energy-absorbing frame 3 and can be used for the installation connection between the whole battery pack and the electrical device, and the stiffness of the energy-absorbing frame 3, the installation frame 2, and the frame body 1 increases in sequence. When being impacted, the energy-absorbing frame 3 with the smallest stiffness deforms first to absorb the impact energy, and then the installation frame 2 also deforms prior to the frame body 1 to absorb the impact energy, thereby reducing the impact energy acting on the frame body 1 and reducing the intrusion amount of the frame body 1 into the battery cell part after deformation. Specifically, in order to ensure that the energy-absorbing frame 3 deforms first and then absorbs the impact energy, a weak part 32 can be formed on the energy-absorbing frame 3 by setting a groove 321 or an opening 322, thereby reducing the stiffness of the energy-absorbing frame 3 and ensuring that the energy-absorbing frame collapses first, or by configuring the cross-section of the energy-absorbing frame 3 as a conical structure to reduce the stress area of the energy-absorbing frame 3 during impact, ensuring that the energy-absorbing frame 3 deforms first, thereby reducing the intrusion of the frame body 1 into the battery cell, reducing the damage to the battery pack when the vehicle body is impacted, and solving the problem that the damage to the battery pack caused by the vehicle body being impacted affects the driving safety.

[0065] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0066] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0067] Furthermore, any combinations can be made among the various different embodiments of the present disclosure, as long as they do not violate the idea of the present disclosure, and they should also be regarded as the content disclosed by the present disclosure.

Claims

1. A border of a battery tray, characterized in that, The frame includes a frame body, a mounting bracket, and an energy-absorbing bracket. The mounting bracket and the energy-absorbing bracket protrude from the frame body and are located on the same surface of the frame body. The energy-absorbing bracket is located above the mounting bracket, and the energy-absorbing bracket is configured to deform prior to the mounting bracket and the frame body under preset collision conditions.

2. The border of the battery tray according to claim 1, characterized in that, The stiffness of the energy-absorbing bracket, the stiffness of the mounting bracket, and the stiffness of the frame body increase in sequence.

3. The border of the battery tray according to claim 2, wherein The frame body, the mounting bracket, and the energy-absorbing bracket respectively have cross-sections in a direction perpendicular to the length direction of the frame. The moment of inertia of the cross-section of the energy-absorbing bracket, the moment of inertia of the cross-section of the mounting bracket, and the moment of inertia of the cross-section of the frame body increase in sequence.

4. The border of the battery tray according to any one of claims 1-3, characterized in that, The energy-absorbing bracket is connected to the frame body and forms a cavity. The energy-absorbing bracket is provided with a weak part to guide the energy-absorbing bracket to deform towards the frame body.

5. The border of the battery tray according to claim 4, characterized in that, The weak part is configured as a groove, and the groove extends along the length direction of the energy-absorbing bracket and is recessed towards the cavity.

6. The border of the battery tray according to claim 4, characterized in that, The weak part is configured as a plurality of openings, and the plurality of openings are arranged at intervals along the length direction of the energy-absorbing bracket.

7. The border of the battery tray according to claim 4, characterized in that, In a direction away from the frame body, the wall thickness of the energy-absorbing bracket gradually decreases or the wall thickness of the energy-absorbing bracket first gradually decreases and then gradually increases, and the part with the smallest wall thickness of the energy-absorbing bracket is configured as the weak part.

8. The border of the battery tray according to claim 4, wherein, The energy-absorbing bracket includes a first plate body and two second plate bodies. The two second plate bodies respectively connect the first plate body and the frame body to enclose the cavity.

9. The border of the battery tray according to claim 8, characterized in that, The distance between the two second plate bodies gradually decreases towards the side away from the frame body, and the thicknesses of the second plate bodies are the same or gradually decrease towards the side away from the frame body.

10. The border of the battery tray according to claim 8, characterized in that, The distance between the two second plate bodies gradually increases towards the side away from the frame body, and the thicknesses of the second plate bodies gradually decrease towards the side away from the frame body.

11. The border of the battery tray according to claim 8, characterized in that, The shape of the cross-section of the energy-absorbing bracket in a direction perpendicular to the length direction of the frame is configured as a cone.

12. The border of the battery tray according to claim 11, characterized in that, The cone angle of the energy-absorbing bracket is 8°.

13. The border of the battery tray according to claim 9, characterized in that, The thicknesses of the second plate bodies are the same, and the thickness of the second plate body is 1 mm to 4 mm.

14. A battery tray, comprising a bottom plate, characterized in that, The battery tray further includes the frame of the battery tray according to any one of claims 1-13, and the frame is arranged around the bottom plate.

15. A battery pack, characterized in that, The battery pack includes the battery tray according to claim 14.

16. An electrical device, characterized in that, The electrical equipment includes the battery pack according to claim 15.

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