Bottom guard plate supporting structure and battery pack thereof

Abstract

The utility model discloses a bottom guard plate support structure and its battery pack, wherein the bottom guard plate support structure comprises a support plate, a bottom guard plate and foams, the support plate is provided with a plurality of battery positioning holes, a plurality of foams are arranged, all foams are arranged between the support plate and the bottom guard plate, and the bottom guard plate is provided with a plurality of battery positioning holes. One end of the foam is fixedly connected with the bottom protection plate, the end face of the other end of the foam is attached to the supporting plate, and the foam is arranged to avoid the battery positioning hole. The battery positioning hole provides a positioning effect for the installation of the battery and provides a discharge channel for the pressure release valve of the battery cell, the plurality of foams are arranged in a way of avoiding the battery positioning hole, the pressure release channel of the pressure release valve is reserved, and in addition, the plurality of foams are arranged, so that the pressure release valve can be effectively prevented from being blocked under the condition that the foams can provide enough support. The blocking of the foam in the space between the supporting plate and the bottom protection plate is reduced, so that the smoothness of a pressure relief passage is ensured, and the safety performance of the battery pack adopting the bottom protection plate supporting structure is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a bottom guard plate support structure and a battery pack thereof. Background Art

[0002] In the existing technology, the design of the bottom support structure of the battery pack often encounters insurmountable difficulties, especially in ensuring the flatness tolerance of the support plate and the energy absorption when the bottom is subjected to external force impact. The gravity of the module acts on the support plate, which easily causes deformation of the support plate, resulting in poor flatness, and further affecting the installation accuracy of the module and the performance of the final product. In addition, when the bottom guard plate is impacted by an external force, without an effective buffering mechanism, these forces may be directly transmitted to the module, causing damage.

[0003] Currently, there is a support structure with strip-shaped foam arranged at the bottom of the box. The strip-shaped foam is used to absorb the influence of the module weight and manufacturing error on the deformation of the support plate, and the strip-shaped foam absorbs the deformation generated by gravity or external force through its small deformation compression. However, the use of strip-shaped foam may interfere with the position of the cell pressure relief valve due to its large occupied area, thus affecting battery safety. In order to avoid the strip-shaped foam, it is necessary to redesigned the layout of the cells or the position of the pressure relief valve, or set other drainage channels to pre-set drainage channels for the thermal runaway substances that may be discharged by the pressure relief valve. The above methods will increase the complexity and difficulty of the design. Adjusting or adding drainage channels to the pressure relief valve means that additional processing steps need to be added during the production and assembly process, such as drilling holes and installing drainage pipes. This not only prolongs the production cycle, but also may require new production equipment and tools. The increase in the corresponding process steps directly leads to an increase in processing costs, including material costs (such as drainage pipe materials), equipment investment, and additional labor costs. At the same time, design changes may also require re-conducting safety tests and verifications, further increasing the R & D and certification costs. Summary of the Utility Model

[0004] In order to overcome at least one of the above-mentioned defects of the existing technology, the utility model provides a bottom guard plate support structure and a battery pack thereof, which can solve the problem of limited installation of cells caused by the use of strip-shaped foam.

[0005] The technical solution adopted by the utility model to solve its problems is:

[0006] A bottom guard plate support structure, comprising:

[0007] A support plate, which is provided with a plurality of battery positioning holes;

[0008] A bottom guard plate;

[0009] The foam is provided with a plurality of pieces, and all the foams are arranged between the support plate and the bottom protection plate. One end of the foam is fixedly connected to the bottom protection plate, and the end face of the other end is attached to the support plate, and the foam is arranged to avoid the battery positioning holes.

[0010] By adopting the above scheme, the battery positioning holes provide a positioning effect for the installation of the battery and provide a discharge channel for the pressure relief valve of the battery cell. A plurality of foams are provided and arranged to avoid the battery positioning holes, so as to retain the pressure relief channel of the pressure relief valve. In addition, the foams are divided into multiple pieces, which can ensure that under the condition that the foams can provide sufficient support, the blockage of the space between the support plate and the bottom protection plate by the foams is reduced, so as to ensure the smoothness of the pressure relief path, and thus ensure the safety performance of the battery pack adopting the bottom protection plate support structure.

[0011] Further, a plurality of the foams abut against the support plate, and a plurality of the battery positioning holes are evenly distributed around the contact position between the foam and the support plate.

[0012] By adopting the above scheme, since the main load source on the support plate is the battery assembled on the battery positioning holes, correspondingly, the weight of the battery is also mainly concentrated at the battery positioning holes. The multiple battery positioning holes are evenly distributed with the foam as the midpoint, which can provide targeted support for the high-load positions on the support plate, that is, provide targeted support for the positions where the support plate is prone to deformation, so as to ensure sufficient support force for the support plate, prevent the support plate from deforming excessively, and at the same time can absorb the amount of deformation at the positions where the support plate is prone to deformation, thereby ensuring the safety and stability of the overall battery.

[0013] Further, a plurality of the battery positioning holes are arranged in a matrix, and the foams are evenly arranged between two adjacent columns of the battery positioning holes, and / or the foams are evenly arranged between two adjacent rows of the battery positioning holes.

[0014] By adopting the above scheme, by arranging the battery positioning holes in a matrix, it can be ensured that the distribution of the battery modules on the support plate is more uniform, and the weight of each battery is evenly dispersed. The foams are specifically arranged between the columns and / or rows of the battery positioning holes arranged in a matrix, so that the stress points on the support plate are more accurately supported, effectively reducing the local deformation caused by concentrated load, maximizing the use of the micro-deformation characteristics of the foams, absorbing the impact brought by the module weight and installation error, as well as the vibration that may occur during daily use, protecting the battery module from damage, and at the same time reducing the direct pressure on the support plate and maintaining its flatness.

[0015] Further, the foam and the battery positioning holes are both cylindrical, and the outer peripheral surface of the foam is tangent to the outer peripheral surfaces of two adjacent battery positioning holes or four adjacent battery positioning holes of the foam.

[0016] By adopting the above solution, the battery positioning holes are designed to be cylindrical mainly for corresponding positioning and assembly of cylindrical batteries. The foam is set to be cylindrical. Compared with rectangular or other polygonal prism-shaped foams, the supporting force is a quarter higher. The foam is arranged tangentially to the battery positioning holes, which can ensure the maximization of the design of the foam in a limited space, and then complete the maximization design of the supporting force of the foam.

[0017] Further, the multiple battery positioning holes are arranged in multiple columns, and the adjacent two columns of battery positioning holes are arranged in a staggered manner. The connection line between the center point of each battery positioning hole and the two closest center points of the battery positioning holes in the adjacent column forms an isosceles triangle, and the foam is correspondingly arranged at the midpoint of each isosceles triangle.

[0018] By adopting the above solution, targeted designs are carried out for different layout methods of the battery positioning holes. On the basis of the staggered arrangement of the battery positioning holes, for each battery positioning hole and the two closest battery positioning holes in the adjacent column, the center points of the above three battery positioning holes can form an isosceles triangle. The foam is correspondingly arranged at the midpoint of the isosceles triangle to ensure that the foam can provide targeted support, ensure uniform support for the support plate, and then ensure the safety and stability of the battery.

[0019] Further, both the foam and the battery positioning holes are cylindrical, and the outer peripheral surface of the foam is tangent to the outer peripheral surfaces of the three adjacent battery positioning holes.

[0020] By adopting the above solution, on the basis of the staggered arrangement of the adjacent two columns of battery positioning holes, combined with the cylindrical design of the foam and the battery positioning holes, the adjacent two columns of battery positioning holes can be designed more compactly, thereby increasing the battery density. On the basis of the above structure, using a rectangular foam cannot achieve the maximization of the foam volume without interfering with the battery positioning holes. Using a cylindrical foam, and the foam is tangent to the three adjacent battery positioning holes, can achieve the maximization of the foam volume without interfering with the battery positioning holes, and then ensure that the effect of the designed foam reaches the optimal.

[0021] Further, the ratio of the diameter of the foam to the aperture of the battery positioning hole is 2:3.

[0022] By adopting the above solution, the above ratio ensures that while the foam provides necessary support, it can also deform sufficiently to absorb and buffer the energy brought by the weight of the module and external impacts. That is, it ensures that the foam does not reach the limit deformation prematurely when absorbing energy, nor loses sufficient supporting force due to being too soft, thus achieving a good balance between protecting the module from damage and maintaining structural stability.

[0023] Furthermore, the material of the foam is polyurethane or polyethylene.

[0024] By adopting the above solution, polyurethane and polyethylene have good mechanical properties, can effectively absorb and disperse the weight and external impact force of the battery module, ensure the stability of the support structure and the safety of the module, and their weather resistance and temperature adaptability are also excellent, ensuring stable performance under different environmental conditions. In addition, their good processability and customizability enable the foam to accurately adapt to the layout of the battery positioning holes, realizing efficient assembly. At the same time, the insulating properties of polyurethane and polyethylene themselves enhance the electrical safety level of the battery system.

[0025] The present utility model also provides a battery pack, including a battery module, a box body, a box cover and the above bottom guard plate support structure. The bottom guard plate is arranged at the bottom of the box body. The battery module and the support plate are located inside the box body, and the support plate is located between the battery module and the bottom guard plate. The battery module includes a battery and an adhesive layer. The adhesive layer wraps the side wall of the battery. The pressure relief valve of the battery is opposite to the battery positioning hole of the support plate. The box cover is hermetically connected to the box body.

[0026] By adopting the above solution, adding foam to the battery pack system can effectively absorb the deformation of the support plate caused by the self-weight of the battery and manufacturing tolerances, and correct the poor flatness of the support plate caused by gravity through minute compressive deformation, ensuring the flatness and stability of the module installation platform, thereby improving the assembly accuracy of the battery module and the overall system performance.

[0027] In addition, when the bottom of the battery pack is subjected to external impact, the foam, as an energy absorption medium, can disperse and absorb the impact force transmitted to the module. By deforming the foam itself, part of the impact energy is absorbed, avoiding excessive force directly acting on the battery, reducing the risk of battery damage caused by external impact, and enhancing the impact resistance and overall safety of the battery pack.

[0028] Furthermore, the side wall of the support plate abuts against the inner side wall of the box body.

[0029] By adopting the above solution, by making the side walls of the support plate and the box body abut against each other, the overall rigidity of the support structure can be effectively increased, preventing unnecessary movement or offset of the support plate when subjected to external pressure or vibration, thereby ensuring the stable installation and safe operation of the battery module. More importantly, it can prevent the foam from tilting or bending due to the offset of the support plate, and further prevent some secondary problems caused by the tilting or bending of the foam, such as the plastic deformation of the foam and the loss of the function of the foam.

[0030] In summary, a bottom guard plate support structure and a battery pack provided by the present utility model have the following technical effects:

[0031] Regarding the bottom guard plate support structure: The battery positioning holes provide positioning effect for the installation of the battery and a discharge channel for the pressure relief valve of the battery cell. There are multiple pieces of foam, which are arranged avoiding the battery positioning holes, retaining the pressure relief channel of the pressure relief valve. In addition, the foam is divided into multiple parts, which can ensure that while providing sufficient support, the foam reduces the blockage of the space between the support plate and the bottom guard plate, thus ensuring the smoothness of the pressure relief path and the safety performance of the battery pack adopting this bottom guard plate support structure.

[0032] Regarding the battery pack: Integrating the foam design in the battery pack system can not only effectively address the issues of battery self-weight and manufacturing tolerances. The slight compression deformation of the foam absorbs the deformation of the support plate caused by gravity, corrects the flatness deviation, ensures the flatness and stability of the module installation platform, and improves the assembly accuracy and the overall performance of the system. Moreover, when facing external impacts at the bottom, the foam acts as a key energy buffer medium, dispersing and absorbing the impact force, relying on its deformation to absorb part of the external force, thus greatly reducing the impact directly borne by the battery and significantly reducing the risk of external force damage, enhancing the impact resistance and the overall safety factor of the battery pack. Brief Description of the Drawings

[0033] Figure 1 It is an exploded structure schematic diagram of the bottom guard plate support structure of the present utility model;

[0034] Figure 2 It is a schematic diagram of the positional relationship between the reverse side of the support plate and the foam of the present utility model;

[0035] Figure 3 It is a schematic diagram of one setting method of the foam when the battery positioning holes of the present utility model are arranged in a matrix;

[0036] Figure 4 It is a schematic diagram of one setting method of the foam when the battery positioning holes of the present utility model are arranged in a matrix;

[0037] Figure 5 It is a schematic diagram of one setting method of the foam when the battery positioning holes of the present utility model are arranged in a matrix;

[0038] Figure 6 It is a schematic diagram of the foam setting method when the battery positioning holes of the present utility model are arranged in a staggered state;

[0039] Figure 7 It is an exploded structure schematic diagram of the battery pack of the present utility model.

[0040] Among them, the meanings of the reference numerals are as follows: 1, support plate; 11, battery positioning hole; 2, bottom guard plate; 3, foam; 4, battery module; 5, box body; 6, box cover. Detailed implementation mode

[0041] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all of the examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection scope of the present invention.

[0042] For the convenience of understanding the embodiments of the present invention, the following will take specific embodiments as examples and further explain in conjunction with the drawings, and each embodiment does not constitute a limitation to the embodiments of the present invention.

[0043] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0045] Refer to Figure 1 As shown, the present invention discloses a bottom guard plate support structure, including a support plate 1, a bottom guard plate 2 and a foam 3. The support plate 1 is provided with a plurality of battery positioning holes 11, and a plurality of foams 3 are provided. All the foams 3 are arranged between the support plate 1 and the bottom guard plate 2. One end of the foam 3 is fixedly connected to the bottom guard plate 2, and the end face of the other end is attached to the support plate 1, and the foam 3 is arranged to avoid the battery positioning holes 11.

[0046] Specifically, the support plate 1 is arranged parallel to the bottom protection plate 2, the foam 3 is arranged between the support plate 1 and the bottom protection plate 2, the support plate 1 is provided with battery positioning holes 11, the battery positioning holes 11 penetrate through the support plate 1, and the battery positioning holes 11 are used for positioning during battery installation. The battery positioning holes 11 correspond to the pressure relief valves of the batteries installed thereon. The heat runaway substances that may be discharged by the pressure relief valves are discharged through the battery positioning holes 11 to the space between the support plate 1 and the bottom protection plate 2, and then diverted to the position of the explosion-proof valve of the box body 5 subsequently. The number and positions of the battery positioning holes 11 can be adjusted correspondingly according to the specific battery assembly situation, and the foam 3 can be arranged to avoid the battery positioning holes 11. In addition, the number and positions of the foam 3 can be set and adjusted according to the specific load on the support plate 1 and the positions of the battery positioning holes 11. The foam 3 supports the weight of the batteries assembled on the support plate 1 and absorbs the deformation generated by the assembly of the batteries on the support plate 1. The foam 3 can also absorb a certain amount of external impact force that the bottom protection plate 2 may receive, thereby reducing the impact directly borne by the batteries and reducing the risk of external damage to the entire battery pack. More importantly, the foam 3 is divided into multiple parts, and the control of the shape and designed volume of the foam 3 is more flexible. It can minimize the blockage of the foam 3 to the cavity between the support plate 1 and the bottom protection plate 2, thereby ensuring the smoothness of the pressure relief path and further ensuring the safety performance of the battery pack using this bottom protection plate support structure.

[0047] Refer to Figures 2 - 6 As shown, in some embodiments, for the convenience of designing the positions of the foam 3 and the battery positioning holes 11, multiple foams 3 abut against the support plate 1, and multiple battery positioning holes 11 are evenly distributed around the contact position between the foam 3 and the support plate 1, that is, taking the foam 3 as the center point, multiple battery positioning holes 11 are evenly arranged in the circumferential direction of the foam 3. Specifically, since the main load source on the support plate 1 is the battery assembled on the battery positioning hole 11, correspondingly, the weight of the battery is also mainly concentrated at the battery positioning hole 11. Arranging multiple battery positioning holes 11 evenly with the foam 3 as the center point can provide targeted support for the high-load areas on the support plate 1, that is, provide targeted support for the positions on the support plate 1 that are prone to deformation, so as to ensure sufficient support force for the support plate 1, prevent excessive deformation of the support plate 1, and at the same time absorb the amount of deformation at the positions on the support plate 1 that are prone to deformation, thereby ensuring the safety and stability of the overall battery.

[0048] Refer to Figures 3 - 5 As shown, in some embodiments, multiple battery positioning holes 11 are arranged in a matrix, and the foam 3 is evenly arranged between two adjacent columns of battery positioning holes 11, and / or the foam 3 is evenly arranged between two adjacent rows of battery positioning holes 11.

[0049] Specifically, the battery positioning holes 11 are arranged in a matrix, and the specific row and column spacings can be set according to actual needs. The setting position of the foam 3 relative to the battery positioning holes 11 is as follows: among the battery positioning holes 11 arranged in a matrix, there are multiple 1×2 matrices, 2×1 matrices, and 2×2 matrices.

[0050] Refer to Figure 3 As shown, among the battery positioning holes 11 in a 1×2 matrix, that is, two adjacent battery positioning holes 11 in the same column, the foam 3 can be arranged at the position between the above two battery positioning holes 11, that is, the above foam 3 is evenly distributed between two adjacent columns of battery positioning holes 11;

[0051] Refer to Figure 4 As shown, among the battery positioning holes 11 in a 2×1 matrix, that is, two adjacent battery positioning holes 11 in the same row, the foam 3 can be arranged at the position between the above two battery positioning holes 11, that is, the above foam 3 is evenly distributed between two adjacent rows of battery positioning holes 11;

[0052] At the same time, adopting the position where the foam 3 is arranged in the 1×2 matrix and the position where the foam 3 is arranged in the 2×1 matrix above is one case where the above foam 3 is arranged evenly between two adjacent columns and two adjacent rows of battery positioning holes 11.

[0053] Refer to Figure 5 As shown, among the battery positioning holes 11 in a 2×2 matrix, that is, among two adjacent columns of battery positioning holes 11, taking two adjacent rows of battery positioning holes 11, which is the 2×2 matrix, that is, another case where the above foam 3 is arranged evenly between two adjacent columns and two adjacent rows of battery positioning holes 11.

[0054] Based on the structure of the battery positioning holes 11 arranged in the above matrix, multiple positions for evenly arranging the foam 3 are provided, which can ensure that the distribution of the battery modules 4 on the support plate 1 is more uniform, and the weight of each battery is evenly dispersed. The foam 3 is specifically arranged between columns and / or rows of the battery positioning holes 11 arranged in a matrix, so that the stress points on the support plate 1 are more accurately supported, effectively reducing local deformation caused by concentrated load, maximizing the use of the small deformation characteristics of the foam 3, absorbing the impact brought by the module weight and installation error, as well as the vibration that may occur during daily use, protecting the battery module 4 from damage, and at the same time reducing the direct pressure on the support plate 1 and maintaining its flatness.

[0055] It should be noted that the specific number of foam 3 can be selected according to the load to be borne and the material strength of the foam 3 specifically used.

[0056] Further, on the basis of the structure of the battery positioning holes 11 arranged in the above matrix, both the foam 3 and the battery positioning holes 11 are cylindrical, and the foam 3 is tangent to two adjacent battery positioning holes 11 or four adjacent battery positioning holes 11 of the foam 3. Among them, the foam 3 is tangent to two adjacent battery positioning holes 11 of the foam 3, that is, corresponding to the setting method of the foam 3 in the above 1×2 matrix and 2×1 matrix, and the foam 3 is tangent to four adjacent battery positioning holes 11 of the foam 3, that is, corresponding to the setting method of the foam 3 in the above 2×2 matrix.

[0057] The specific cylindrical design of the battery positioning holes 11 is mainly for the corresponding positioning and assembly of cylindrical batteries. The foam 3 is set to be cylindrical. Compared with the foam 3 in the shape of a rectangle or other polygonal prisms, the supporting force is one-fourth higher. The foam 3 is tangent to the battery positioning holes 11, which can ensure that the foam 3 achieves the maximum design in a limited space, and then completes the maximum design of the supporting force of the foam 3.

[0058] Refer to Figure 2 and Figure 6 As shown, in some embodiments, multiple battery positioning holes 11 are arranged in multiple columns, and the adjacent two columns of battery positioning holes 11 are arranged in a staggered manner. The connection line between the center point of each battery positioning hole 11 and the center points of the two battery positioning holes 11 with the shortest distance in the adjacent column of battery positioning holes 11 forms an isosceles triangle, and the foam 3 is correspondingly arranged at the midpoint of each isosceles triangle. The same beneficial effects as the matrix arrangement of the battery positioning holes 11 will not be elaborated here. In addition, on the basis of the staggered arrangement of the battery positioning holes 11, each battery positioning hole 11 and the two battery positioning holes 11 with the shortest distance in its adjacent column, the center points of the above three battery positioning holes 11 can all form an isosceles triangle, and the foam 3 is specifically arranged at the midpoint of the isosceles triangle to ensure that the foam 3 can provide targeted support, ensure uniform support for the support plate 1, and then ensure the safety and stability of the battery.

[0059] It should be noted that the specific number of the foam 3 can be selected according to the load to be borne and the material strength of the foam 3 specifically used.

[0060] Further, based on the structure where the battery positioning holes 11 in adjacent two columns are misaligned as described above, combined with the design that both the foam 3 and the battery positioning holes 11 are cylindrical, it is possible to make the battery positioning holes 11 in adjacent two columns more compactly designed, thereby increasing the battery density. When a more compact design is adopted for the cylindrical battery positioning holes 11 in adjacent two columns, using a rectangular foam 3 cannot maximize the volume of the foam 3 without interfering with the battery positioning holes 11. Therefore, the foam 3 also correspondingly adopts a cylindrical design. To improve the supporting effect of the foam 3, the foam 3 is tangent to three adjacent battery positioning holes 11 of the foam 3. It can maximize the volume of the foam 3 without interfering with the battery positioning holes 11, thereby ensuring that the effect of designing the foam 3 reaches the optimal level.

[0061] In this embodiment, in order to balance the absorption of the deformation of the support plate 1 and the bottom protection plate 2 by the foam 3 and provide sufficient supporting force to the support plate 1, the ratio of the diameter of the foam 3 to the aperture diameter of the battery positioning hole 11 is 2:3. Through the above proportional design, it can be ensured that while the foam 3 provides necessary support, it can also deform sufficiently to absorb and buffer the energy brought by the weight of the module and external impacts. That is to ensure that the foam 3 does not reach the limit deformation prematurely when absorbing energy, nor lose sufficient supporting force due to being too soft, thus achieving a good balance between protecting the module from damage and maintaining structural stability.

[0062] In this embodiment, to ensure the performance of the foam 3, the foam 3 is made of polyurethane or polyethylene.

[0063] Specifically, polyurethane and polyethylene have good mechanical properties, can effectively absorb and disperse the weight of the battery module 4 and external impact forces, ensure the stability of the support structure and the safety of the module, and their weather resistance and temperature adaptability are also excellent, ensuring stable performance under different environmental conditions. In addition, their good processability and customizability enable the foam 3 to accurately adapt to the layout of the battery positioning holes 11, realizing efficient assembly. At the same time, the insulating properties of polyurethane and polyethylene themselves enhance the electrical safety level of the battery system.

[0064] The present utility model also provides a battery pack. Refer to Figure 7 As shown, it includes a battery module 4, a box body 5, a box cover 6 and the above-mentioned bottom protection plate support structure. The bottom protection plate 2 is arranged at the bottom of the box body 5. The battery module 4 and the support plate 1 are located inside the box body 5, and the support plate 1 is located between the battery module 4 and the bottom protection plate 2. The battery module 4 includes a battery and an adhesive layer, the adhesive layer wraps the side wall of the battery, the pressure relief valve of the battery is opposite to the battery positioning hole 11 of the support plate 1, and the box cover 6 is hermetically connected to the box body 5.

[0065] Specifically, adding the foam 3 to the battery pack system can effectively absorb the deformation of the support plate 1 caused by the self-weight of the battery and manufacturing tolerances, and correct the poor flatness of the support plate 1 caused by gravity through a small amount of compressive deformation, ensuring the flatness and stability of the module installation platform, thereby improving the assembly accuracy of the battery module 4 and the overall system performance.

[0066] In addition, when the bottom of the battery pack is subjected to an external impact, the foam 3, as an energy absorption medium, can disperse and absorb the impact force transmitted to the module. By deforming the foam 3 itself, part of the impact energy is absorbed, avoiding excessive force directly acting on the battery, reducing the risk of battery damage caused by external impact, and enhancing the impact resistance and overall safety of the battery pack.

[0067] In this embodiment, in order to ensure the safety of the foam 3 during use, the side wall of the support plate 1 abuts against the inner side wall of the box body 5. Specifically, by making the side wall of the support plate 1 and the inner side wall of the box body 5 abut against each other, the overall rigidity of the support structure can be effectively increased, preventing unnecessary movement or deviation of the support plate 1 when subjected to external pressure or vibration, thereby ensuring the stable installation and safe operation of the battery module 4. More importantly, it can prevent the foam 3 from tilting or bending due to the deviation of the support plate 1, and further prevent some secondary problems caused by the tilting or bending of the foam 3, such as the plastic deformation of the foam 3 and the loss of the function of the foam 3.

[0068] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. A bottom guard plate support structure, characterized in that: include: A support plate (1), wherein the support plate (1) is provided with a plurality of battery positioning holes (11); Bottom guard plate (2); Foam (3), wherein a plurality of foams (3) are provided, and all of the foams (3) are arranged between the support plate (1) and the bottom guard plate (2), one end of the foam (3) is fixedly connected to the bottom guard plate (2), and the end surface of the other end is in contact with the support plate (1), and the foam (3) is arranged to avoid the battery positioning hole (11).

2. A bottom guard plate support structure according to claim 1, characterized in that: The plurality of foams (3) abut against the support plate (1), and the plurality of battery positioning holes (11) are evenly distributed around the contact position between the foam (3) and the support plate (1).

3. A bottom guard plate support structure according to claim 1 or 2, characterized in that: The plurality of battery positioning holes (11) are arranged in a matrix, the foam (3) is evenly distributed between two adjacent columns of the battery positioning holes (11), and / or the foam (3) is evenly distributed between two adjacent rows of the battery positioning holes (11).

4. A bottom guard plate support structure according to claim 3, characterized in that: The foam (3) and the battery positioning hole (11) are both cylindrical, and the outer peripheral surface of the foam (3) is tangent to the outer peripheral surfaces of two adjacent battery positioning holes (11) or four adjacent battery positioning holes (11) of the foam (3).

5. A bottom guard plate support structure according to claim 1 or 2, characterized in that: The plurality of battery positioning holes (11) are arranged in a plurality of columns, and the battery positioning holes (11) in two adjacent columns are staggered, a line connecting the center point of each battery positioning hole (11) and the center points of the two battery positioning holes (11) in an adjacent column with the shortest distance therebetween forms an isosceles triangle, and the foam (3) is correspondingly arranged at the midpoint of each of the isosceles triangles.

6. A bottom guard plate support structure according to claim 5, characterized in that: The foam (3) and the battery positioning hole (11) are both cylindrical, and the outer peripheral surface of the foam (3) is tangent to the outer peripheral surfaces of three battery positioning holes (11) adjacent to the foam (3).

7. A bottom guard plate support structure according to claim 4 or 6, characterized in that: The ratio of the diameter of the foam (3) to the aperture of the battery positioning hole (11) is 2:

3.

8. The bottom guard plate support structure according to claim 1, characterized in that: The foam (3) is made of polyurethane or polyethylene.

9. A battery pack, characterized in that: It comprises a battery module (4), a box body (5), a box cover (6) and a bottom guard plate support structure as described in any one of claims 1 to 8, wherein the bottom guard plate (2) is arranged at the bottom of the box body (5), the battery module (4) and the support plate (1) are located in the box body (5), and the support plate (1) is located between the battery module (4) and the bottom guard plate (2); the battery module (4) comprises a battery and a glue layer, the glue layer wraps the side wall of the battery, the pressure relief valve of the battery is opposite to the battery positioning hole (11) of the support plate (1), and the box cover (6) is sealed and connected to the box body (5).

10. A battery pack according to claim 9, characterized in that: The side wall of the support plate (1) abuts against the inner side wall of the box body (5).

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