Bracket for battery pack, battery pack and vehicle

Abstract

The utility model discloses a bracket for a battery pack, the battery pack and a vehicle. The bracket for the battery pack comprises a bracket body and at least one separator, the separator is arranged on the bracket body, and the separator is suitable for being inserted between two adjacent battery cells of the battery pack. In the embodiment, the first direction is the length direction of the battery cell, the second direction is the width direction of the battery cell, and the third direction is the height direction of the battery cell. The separator is arranged on the bracket body and is arranged between the two adjacent battery cells, so that other media in the battery pack can be prevented from entering the space between the two adjacent battery cells, the phenomenon that the media occupy the expansion space of the battery cells, extrude the pole cores and cause the uneven stress of the pole cores to generate lithium precipitation is avoided, and the electrical performance cycle life of the battery cells is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a bracket for a battery pack, a battery pack, and a vehicle. Background Technology

[0002] In existing technologies, vehicle battery packs are generally designed using CTP (Cell to Pack) technology, which means that the cells are directly integrated into the battery pack. The narrow bottom face of the cell is connected to the tray by adhesive. When the vehicle and battery pack vibrate due to uneven road surfaces, the force transmitted through the adhesive under the narrow face of the cell will cause the cell to bend and deform. When the cell is subjected to alternating stress caused by vibration for a long time, it will cause material fatigue failure, cracks, leakage of cell fluid, and safety issues. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a support for a battery pack that can improve the bending resistance of the battery pack.

[0004] The second objective of this invention is to provide a battery pack, comprising a housing, a plurality of battery cells, and a support for the battery pack as described in the first aspect embodiment above.

[0005] The third objective of this invention is to provide a vehicle comprising the battery pack described in any one of the embodiments of the second aspect above.

[0006] A support for a battery pack according to a first aspect of the present invention includes: a support body and at least one separator, the separator being disposed on the support body and adapted to be inserted between two adjacent cells of the battery pack.

[0007] According to the present invention, a support for a battery pack is provided on the support body, and the separation member is provided between two adjacent cells. This can prevent other media in the battery pack from entering between two adjacent cells, avoid the media from occupying the cell expansion space, squeezing the electrode core, causing uneven force on the electrode core and resulting in lithium plating, and improve the electrical performance cycle life of the cell.

[0008] In some embodiments, one end of the separator is connected to one side surface of the support body in the thickness direction, and the other end of the separator extends in a direction away from the support body.

[0009] In some embodiments, the length of the separator in the thickness direction of the support body is b, wherein b satisfies: 5mm≤b≤10mm.

[0010] In some embodiments, there are multiple spacers, which are spaced apart on the support body and located on the same side in the thickness direction of the support body.

[0011] In some embodiments, both the support body and the partition are made of plastic.

[0012] A battery pack according to a second aspect of the present invention includes: a housing, a plurality of battery cells, and a bracket; the plurality of battery cells are disposed within the housing, and the bracket is the bracket for a battery pack as described in any one of the first aspects of the present invention, the bracket being disposed between the plurality of battery cells and the housing, and a spacer of the bracket being inserted between two adjacent battery cells.

[0013] In some embodiments, two adjacent cells abut against the separator.

[0014] In some embodiments, at least one end of the battery cell along its length is provided with an explosion-proof valve, and the bracket is disposed between the end of the battery cell with the explosion-proof valve and the inner wall of the corresponding housing.

[0015] In some embodiments, an exhaust channel is formed on the support body, the exhaust channel extends along the arrangement direction of the plurality of battery cells, and the explosion-proof valve is opposite to the exhaust channel.

[0016] In some embodiments, a plurality of vent holes are formed on the bracket body, and the explosion-proof valve is opposite to at least one of the vent holes along the length direction of the battery cell.

[0017] In some embodiments, at least one through hole is formed on the support body, the through hole is disposed between two adjacent separators, and the through hole mates with the terminal of the battery cell.

[0018] In some embodiments, the battery pack further includes a potting compound disposed between the bracket and the inner wall of the housing.

[0019] In some embodiments, the potting compound and the explosion-proof valve are spaced apart, and the distance between the potting compound and the explosion-proof valve is a, wherein a satisfies: 0 < a ≤ 5 mm.

[0020] In some embodiments, the energy storage modulus of the potting compound is E, wherein E satisfies: 100MPa<E≤2000MPa.

[0021] In some embodiments, the battery cell includes: a battery cell cover plate, a bracket disposed between the battery cell cover plate and the housing, and an explosion-proof valve disposed on the battery cell cover plate.

[0022] The vehicle according to a third aspect embodiment of the present invention includes the battery pack described in any one of the second aspect embodiments above.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a three-dimensional split view of the battery pack according to the second aspect of the present utility model;

[0026] Figure 2 yes Figure 1 Enlarged schematic diagram of region P in the middle;

[0027] Figure 3 yes Figure 1 Enlarged schematic diagram of the mid-Q region;

[0028] Figure 4 This is a schematic diagram of a bracket according to a first aspect embodiment of the present invention.

[0029] Figure label:

[0030] 100. Bracket;

[0031] 10. Support body; 101. Through hole;

[0032] 20. Divider;

[0033] 30. Battery cell; 301. Battery cell cover; 31. Explosion-proof valve;

[0034] 200. Battery pack;

[0035] 40. Housing; 41. Potting compound;

[0036] A. First direction; B. Second direction; C. Third direction. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-4 The present invention describes a bracket 100 for a battery pack 200 according to an embodiment of the present invention. The bracket 100 includes a bracket body 10 and at least one separator 20.

[0038] Specifically, such as Figure 1 , Figure 2 and Figure 4As shown, the separator 20 is disposed on the bracket body 10, and the separator 20 is adapted to be inserted between two adjacent battery cells 30 of the battery pack 200. In this embodiment, the first direction A is the length direction of the battery cell 30, the second direction B is the width direction of the battery cell 30, and the third direction C is the height direction of the battery cell 30.

[0039] In this embodiment, the battery pack 200 contains a plurality of battery cells 30, which are spaced apart along a second direction B. A bracket body 10 has a plurality of separators 20, each located between two adjacent battery cells 30 to seal them along a first direction A. The bracket body 10 is positioned at both ends of the battery cells 30 along the first direction A and extends along the second direction B. The separators 20 are located on the side of the bracket body 10 adjacent to the battery cells 30, extending along a third direction C and inserted between two adjacent battery cells 30 along the first direction A.

[0040] According to an embodiment of the present invention, a bracket 100 for a battery pack 200, by providing a separator 20 on the bracket body 10 and positioning the separator 20 between two adjacent battery cells 30, can prevent other media within the battery pack 200 from entering between the two adjacent battery cells 30. This avoids media encroaching on the expansion space of the battery cell 30, compressing the electrode core, causing uneven stress on the electrode core, and resulting in lithium plating, thereby improving the electrical performance and cycle life of the battery cell 30. According to some embodiments of the present invention, such as... Figure 4 As shown, one end of the separator 20 is connected to one side surface of the support body 10 in the thickness direction, i.e., the first direction A, and the other end of the separator 20 extends in a direction away from the support body 10. In this embodiment, the thickness direction of the support body 10 is the first direction A.

[0041] That is, one end of the separator 20 is connected to the side of the bracket body 10 adjacent to the battery cell 30, and the other end extends along the first direction A toward the battery cell 30 and is located between two battery cells 30. Thus, by connecting one end of the separator 20 to the surface of the bracket body 10 in the first direction A, and extending the other end of the separator 20 away from the bracket body 10 and inserting it between two adjacent battery cells 30, the bracket body 10 and the battery cells 30 can be connected, ensuring that the battery cells 30 form the same and effective deformation space. When the vehicle vibrates due to uneven road surface, it can prevent the outer periphery of the battery cell 30 from being scratched by other structural components, and at the same time further improve the reliability of the connection between adjacent battery cells 30 and the structural strength of the connection.

[0042] According to some embodiments of this utility model, such as Figure 2 As shown, the length of the separator 20 in the thickness direction of the support body 10 is b, and b satisfies: 5mm≤b≤10mm.

[0043] When the length of the separator 20 in the first direction A of the bracket body 10 is less than 5mm, the small length of the separator 20 in the first direction A of the bracket body 10 may lead to a smaller contact area between the separator 20 and two adjacent cells 30, reducing the connection strength between the bracket body 10 and the cells 30. This makes it easier for external substances such as glue and impurities to enter between the cells 30, occupying the space formed between the cells 30 for expansion. When the length of the separator 20 in the first direction A of the bracket body 10 is greater than 10mm, the separator 20 in the bracket body 10 may have a smaller contact area with the adjacent cells 30. The larger length of the body 10 in the first direction A may increase the contact area between the separator 20 and the two adjacent cells 30. While this increases the connection strength between the support body 10 and the cells 30 and the sealing of the space formed between the cells 30, it also increases the space occupied by the separator 20 between the two adjacent cells 30. This cannot fully meet the expansion space required for the internal circulation of the cells 30, making it easy for the cells 30 to deform and leak after being squeezed. At the same time, the heat generated inside the cells 30 cannot be dissipated, and the internal temperature of the cells 30 continues to rise, which can easily lead to thermal runaway. For example, b = 7.5 mm.

[0044] Therefore, limiting the length of the separator 20 in the first direction A of the bracket body 10 can prevent external glue and impurities from entering the cell 30, improve the sealing of the cell 30, and at the same time avoid occupying too much space between the cells 30, providing sufficient expansion space for the internal circulation of the cell 30, avoiding the cell 30 being squeezed and leaking liquid and thermal runaway, extending the service life of the cell 30, and improving the reliability and practicality of the battery pack 200.

[0045] According to some embodiments of this utility model, such as Figure 4 As shown, there are multiple partitions 20, which are arranged at intervals on the support body 10 and are located on the same side in the thickness direction of the support body 10.

[0046] That is, multiple separators 20 are spaced apart on the bracket body 10 along the second direction B, and the multiple separators 20 are all located on the same side of the bracket body 10 adjacent to the battery cell 30.

[0047] Therefore, by arranging multiple separators 20 at intervals on the support body 10, and with all multiple separators 20 located on the same side of the support body 10 adjacent to the battery cell 30, multiple separators 20 can share one support body 10, which can avoid stress concentration on the support body 10, improve the structural strength of the support body 10, improve the connection strength between the support body 10 and the battery cell 30, and save the space occupied by the support body 10.

[0048] In this embodiment, the number of multiple separators 20 is limited according to the size of different cells 30 along the second direction B, thereby improving the adaptability and versatility of the bracket 100 used for the battery pack 200.

[0049] According to some embodiments of this utility model, both the bracket body 10 and the separator 20 are plastic parts.

[0050] That is, both the support body 10 and the separator 20 are made of ABS plastic, also known as acrylonitrile butadiene styrene copolymer, or ABS resin. ABS plastic is a thermoplastic polymer structural material with high heat resistance, high strength, good toughness, and easy processing and molding.

[0051] Therefore, both the bracket body 10 and the separator 20 are made of plastic. During the cycle of the battery cell 30, the good heat resistance and thermoplasticity of ABS plastic can prevent the temperature inside the battery cell 30 from becoming too high and damaging the separator 20, thus reducing processing costs. When the vehicle vibrates due to uneven road surfaces, the good toughness and strength of ABS plastic can buffer the impact force from the outside on the battery cell 30, preventing the battery cell 30 from bending and deforming. At the same time, ABS plastic can also reduce voltage fluctuations inside the battery cell 30, improve the cycle efficiency of the battery cell 30, improve the electrical performance of the battery cell 30, and extend the service life of the battery pack 200.

[0052] According to the second aspect embodiment of the present utility model, the battery pack 200, such as Figure 1 and Figure 3 As shown, it includes: a housing 40, a plurality of battery cells 30 and a bracket 100; the plurality of battery cells 30 are disposed inside the housing 40, and the bracket 100 is any of the brackets for the battery pack 200 in the first aspect embodiment described above. The bracket 100 is disposed between the plurality of battery cells 30 and the housing 40, and the spacer 20 of the bracket 100 is inserted between two adjacent battery cells 30.

[0053] That is, multiple battery cells 30 are directly installed inside the housing 40 of the battery pack 200, the bracket 100 is installed between the battery cell 30 and the corresponding side wall along the first direction A, and the separator 20 is installed on the side of the bracket body 10 adjacent to the battery cell 30, with one end connected to the bracket body 10 and the other end fitted between two adjacent battery cells 30 and abutting against the battery cells 30 respectively.

[0054] Therefore, by placing the bracket 100 between multiple battery cells 30 and the housing 40, and by inserting multiple separators 20 between two adjacent battery cells 30, a certain gap can be created between two adjacent battery cells 30, providing expansion space for the internal circulation of the battery cells 30, thus preventing the battery cells 30 from bending and deforming, and avoiding bulging of the battery pack 200. The separators 20 can also prevent the expansion space from being occupied by other materials such as glue, thus optimizing the internal structure of the battery pack 200.

[0055] According to some embodiments of this utility model, two adjacent battery cells 30 abut against the separator 20.

[0056] That is, when the battery cell 30 and the bracket 100 are installed into the battery pack 200, the separator 20 abuts against two adjacent battery cells 30 along the second direction B, and the battery cell 30 abuts against the bracket 100 along the first direction A, so that the space between the battery cells 30 at the end along the first direction A is not connected to other spaces within the battery pack 200. Thus, the abutment between two adjacent battery cells 30 and the separator 20 prevents the medium within the battery pack 200 from flowing into the space between the battery cells 30 and occupying it, thereby ensuring that the space formed between the battery cells 30 can accommodate the deformation caused by thermal expansion, increasing the protection of the battery cells 30. Simultaneously, when the vehicle vibrates due to uneven road surfaces, the battery cells 30 are subjected to working loads. The separator 20 applies a certain preload between two adjacent battery cells 30, which increases the reliability and tightness of the connection between the separator 20 and the two adjacent battery cells 30, preventing relative displacement of the two adjacent battery cells 30.

[0057] According to some embodiments of this utility model, such as Figure 3 As shown, at least one end of the battery cell 30 along the length direction of the battery cell 30, i.e., the first direction A, is provided with an explosion-proof valve 31, and the bracket 100 is located between the end of the battery cell 30 with the explosion-proof valve 31 and the inner wall of the corresponding housing 40.

[0058] That is, the explosion-proof valve 31 is located at at least one end of the battery cell 30 along the first direction A. The bracket 100 is located near the end of the battery cell 30 where the explosion-proof valve 31 is located and is connected to the battery cell 30. The explosion-proof valve 31 is opposite to the through hole 101 on the bracket 100 along the first direction A. When the explosion-proof valve 31 needs to release pressure, the airflow inside the battery cell 30 can be discharged from the battery cell 30 through the through hole 101.

[0059] Therefore, the bracket 100 is placed between the end of the battery cell 30 equipped with the explosion-proof valve 31 and the inner wall of the corresponding housing 40. When the battery pack 200 experiences thermal runaway during charging and discharging, the internal temperature of the battery cell 30 rises sharply, and the air pressure also rises. At this time, the explosion-proof valve 31 can open in time to release pressure, avoiding the potential explosion risk caused by excessive internal pressure in the battery pack 200, and ensuring that the battery pack 200 can remain stable under extreme conditions.

[0060] In this embodiment, explosion-proof valves 31 are provided at both ends of the battery cell 30 along the first direction A, and brackets 100 are provided at both ends of the battery cell 30 along the first direction A.

[0061] According to some embodiments of the present invention, an exhaust channel is formed on the bracket body 10, the exhaust channel extends along the arrangement direction of the plurality of battery cells 30, and the explosion-proof valve 31 is opposite to the exhaust channel.

[0062] That is, an exhaust channel is formed on the side of the support body 10 adjacent to the battery cell 30, and the exhaust channel extends along the second direction B. The exhaust channel corresponds to the position of the explosion-proof valve 31 and is connected to the exhaust channel. The exhaust channel is suitable for timely discharge of the gas generated by the depressurization of the explosion-proof valve 31 from the battery cell 30. The exhaust channel can be formed by the support body 10 along the first direction A from the side adjacent to the battery cell 30 to some recesses away from the battery cell 30. The exhaust channel extends along the second direction B through multiple separators 20 so that the gas can be discharged from both ends of the second direction B when the explosion-proof valve 31 is depressurized. Optionally, the exhaust channel is located inside the support body 10 and is connected to multiple explosion-proof valves 31 respectively.

[0063] Therefore, an exhaust channel is formed on the support body 10, which extends along the second direction B of the multiple battery cells 30. The support body 10 can improve the insulation of the corresponding battery cells 30. At the same time, the explosion-proof valve 31 is opposite to the exhaust channel. When thermal runaway occurs in the battery pack 200 during charging and discharging, the explosion-proof valve 31 opens in time to release pressure and discharges the gas generated by the pressure release into the battery cells 30 through the exhaust channel. This can avoid the potential explosion risk caused by excessive internal pressure in the battery pack 200. At the same time, it ensures that the battery pack 200 can remain stable under extreme conditions, effectively improving the safety and stability of the battery pack 200.

[0064] According to some embodiments of this utility model, such as Figure 4 As shown, multiple vent holes are formed on the bracket body 10, and the explosion-proof valve 31 is opposite to at least one vent hole along the length direction of the battery cell 30, that is, the first direction A.

[0065] That is, multiple vent holes are formed on the side of the bracket body 10 adjacent to the cell 30 along the first direction A toward the other side of the bracket body 10 away from the cell 30. At least one vent hole is opposite to or connected to the explosion-proof valve 31 along the first direction A. When the battery pack 200 experiences thermal runaway during charging and discharging, the gas inside the corresponding cell 30 can be discharged from the cell through the vent hole connected to it.

[0066] Therefore, multiple vent holes are formed on the bracket body 10. The explosion-proof valve 31 is opposite to at least one vent hole along the first direction A of the battery cell 30. When thermal runaway occurs in the battery pack 200 during charging and discharging, the explosion-proof valve 31 can promptly discharge the gas generated by the pressure relief through the vent hole, thereby preventing the battery pack 200 from exploding and extending the service life of the battery pack 200.

[0067] According to some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, at least one through hole 101 is formed on the bracket body 10. The through hole 101 is located between two adjacent separators 20 and is engaged with the terminal post of the battery cell 30.

[0068] That is, the battery cell 30 includes a terminal post, and at least one through hole 101 is formed on the side of the bracket body 10 adjacent to the battery cell 30 along the first direction A toward the other side of the bracket body 10 away from the battery cell 30. The through hole 101 is opposite to the terminal post of the battery cell 30 along the first direction A, and during the assembly of the battery pack 200, the through hole 101 and the terminal post of the battery cell 30 are engaged.

[0069] In this embodiment, a plurality of through holes 101 are formed on the support body 10, and the plurality of through holes 101 are spaced apart on the support body 10 along the second direction B.

[0070] Therefore, at least one through hole 101 is formed on the bracket body 10. The through hole 101 is located between two adjacent separators 20. The through hole 101 cooperates with the terminal post of the battery cell 30, which can avoid stress concentration on the terminal post of the battery cell 30, and at the same time reduce the internal pressure of the battery pack 200, so as to avoid the battery pack 200 from exploding due to excessive internal pressure, and effectively improve the safety factor of the battery pack 200.

[0071] According to some embodiments of this utility model, such as Figure 1 As shown, the battery pack 200 also includes a potting compound 41, which is disposed between the inner wall of the bracket 100 and the housing 40.

[0072] That is, the potting compound 41 is disposed along the first direction A on the side of the bracket 100 away from the battery cell 30 to fill the space between the bracket 100 and the inner wall of the housing 40. One end of the potting compound 41 adjacent to the battery cell 30 is connected to the bracket body 10, and the other end extends along the first direction A in a direction away from the battery cell 30 and is connected to the inner wall of the housing 40. The potting compound 41 is also known as electronic adhesive. It has strong sealing properties, high stability, and strong shock absorption capabilities, and is an important material for bonding, sealing, potting, and protecting electronic components.

[0073] Therefore, by placing the potting compound 41 between the inner walls of the support 100 and the housing 40, and placing the separator 20 between two adjacent cells 30, the potting compound 41 can be prevented from entering between adjacent cells 30. This avoids the inhibitory effect of the potting compound 41 on the cells 30 when they expand due to heat, ensuring effective expansion space for the cells 30 during operation. Simultaneously, the placement of the potting compound 41 facilitates effective connection between the cells 30 and the housing 40, effectively improving the rigidity of the battery pack 200, reducing external vibrations transmitted to the inside of the cells 30, and effectively reducing stress on weak points of the cells 30 and the housing 40. Since the cells 30 generate significant heat during operation, the potting compound 41 can directly and evenly transfer this heat, improving the thermal management performance of the battery pack 200. Furthermore, when the battery pack 200 is subjected to impacts and compression, the incompressibility of the polymer material in the potting compound 41 ensures a high-pressure gap between the housing 40 and the cells 30, improving the safety of the battery pack 200.

[0074] According to some embodiments of this utility model, such as Figure 1 As shown, the potting compound 41 and the explosion-proof valve 31 are spaced apart, and the distance between the potting compound 41 and the explosion-proof valve 31 is a, wherein a satisfies: 0 < a ≤ 5 mm.

[0075] In this embodiment, when setting the potting compound 41, the height of the potting compound 41 along the third direction C is lower than the position of the explosion-proof valve 31. That is, after the potting compound 41 is set, it is spaced apart from the explosion-proof valve 31 to avoid the potting compound 41 blocking the explosion-proof valve 31 and causing it to fail. Optionally, if the distance between the potting compound 41 and the explosion-proof valve 31 is less than 0mm, that is, the potting compound 41 will cover the explosion-proof valve 31, blocking the exhaust path. When the battery cell 30 experiences thermal runaway, the explosion-proof valve 31 cannot open in time, resulting in excessive internal pressure and a potential explosion risk. If the distance between the potting compound 41 and the explosion-proof valve 31 is greater than 5mm, the distance between the potting compound 41 and the explosion-proof valve 31 is too large, and the potting compound 41 cannot effectively reduce the vibration transmitted from the outside to the inside of the battery cell 30. At the same time, it may reduce the space utilization of the battery pack 200. For example, a = 2.5mm.

[0076] Therefore, by limiting the distance between the potting compound 41 and the explosion-proof valve 31, the potting compound 41 can be prevented from covering the explosion-proof valve 31. When the cell 30 experiences thermal runaway, the explosion-proof valve 31 can be opened in time, improving the safety of the battery pack 200. At the same time, it effectively reduces the vibration transmitted from the outside to the inside of the cell 30, improving the space utilization of the battery pack 200.

[0077] According to some embodiments of this utility model, the energy storage modulus of the potting compound 41 is E, and E satisfies: 100MPa<E≤2000MPa.

[0078] Storage modulus, also known as elastic modulus or Young's modulus, is the amount of energy stored in a material due to elastic deformation during deformation, reflecting the material's ability to resist deformation. If the storage modulus of the potting compound 41 is less than 100 MPa, it is too small. When the potting compound 41 is subjected to impact, the energy transferred from it to the battery cell 30 increases, and it is difficult for the potting compound 41 to return to its original shape, which may cause bending deformation of the battery cell 30. If the storage modulus of the potting compound 41 is greater than 2000 MPa, it is too large. When the potting compound 41 is subjected to impact, it is not easy for it to deform, and it may fail. For example, E = 1050 MPa. Storage modulus refers to the ratio of strain to stress when a material is subjected to external force, and it is used to describe the material's response behavior within its elastic range. Simply put, storage modulus reflects the material's ability to store elastic energy.

[0079] Therefore, limiting the range of the energy storage modulus of the potting compound 41 can effectively improve the bending resistance of the cell 30, increase the rigidity of the battery pack 200, achieve effective connection between the cell 30 and the casing 40, improve the service life of the battery pack 200, effectively protect the high-voltage gap between the cell 30 and the casing 40, improve the safety of the battery pack 200, evenly transfer heat, and improve the thermal management performance of the battery pack 200.

[0080] According to some embodiments of this utility model, such as Figure 3 As shown, the battery cell 30 includes: a battery cell cover plate 301, a bracket 100 disposed between the battery cell cover plate 301 and the housing 40, and an explosion-proof valve 31 disposed on the battery cell cover plate 301.

[0081] That is, the cell cover plate 301 is disposed at at least one end of the cell 30 along the first direction A, the explosion-proof valve 31 is disposed on the cell cover plate 301, and the bracket body 10 is disposed between the cell cover plate 301 and the housing 40. The thickness of the cell cover plate 301 along the first direction A is generally much greater than the thickness of the cell housing, that is, the bending resistance of the cell cover plate 301 is greater than that of the side wall of the cell housing that contacts the housing 40 of the battery pack 200, which can better improve the structural strength of the battery pack 200.

[0082] Therefore, the bracket 100 is located between the cell cover plate 301 and the housing 40, and the cell 30, cell cover plate 301 and housing 40 are effectively connected by the potting compound 41, which improves the structural strength of the battery pack 200, so that the battery pack 200 has a larger moment of inertia along the first direction A, and can withstand stronger strength and torsional capacity; the explosion-proof valve 31 is located on the cell cover plate 301. When the cell 30 experiences thermal runaway, the explosion-proof valve 31 located on the cell cover plate 301 can be opened in time, improving the safety of the battery pack 200.

[0083] The vehicle according to a third aspect embodiment of the present invention includes a battery pack 200 according to any one of the second aspect embodiments described above.

[0084] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0085] In the description of this utility model, "first feature" and "second feature" may include one or more of the features. In the description of this utility model, "multiple" means two or more. In the description of this utility model, "above" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. In the description of this utility model, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0086] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0087] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A bracket (100) for a battery pack (200), characterized in that, include: Support body (10); At least one separator (20) is provided on the bracket body (10) and the separator (20) is adapted to be inserted between two adjacent cells (30) of the battery pack (200).

2. The bracket (100) for the battery pack (200) according to claim 1, characterized in that, One end of the separator (20) is connected to one side surface of the support body (10) in the thickness direction, and the other end of the separator (20) extends in a direction away from the support body (10).

3. The bracket (100) for the battery pack (200) according to claim 1, characterized in that, The length of the separator (20) in the thickness direction of the support body (10) is b, and b satisfies: 5mm≤b≤10mm.

4. The bracket (100) for the battery pack (200) according to claim 1, characterized in that, There are multiple partitions (20), and the multiple partitions (20) are arranged at intervals on the support body (10), and the multiple partitions (20) are located on the same side in the thickness direction of the support body (10).

5. The bracket (100) for the battery pack (200) according to any one of claims 1-4, characterized in that, Both the support body (10) and the partition (20) are made of plastic.

6. A battery pack (200), characterized in that, include: Casing (40); Multiple battery cells (30) are disposed within the housing (40); A bracket (100) is a bracket (100) for a battery pack (200) according to any one of claims 1-5, the bracket (100) being disposed between a plurality of the battery cells (30) and the housing (40), wherein a spacer (20) of the bracket (100) is inserted between two adjacent battery cells (30).

7. The battery pack (200) according to claim 6, characterized in that, The two adjacent cells (30) abut against the separator (20).

8. The battery pack (200) according to claim 6, characterized in that, The battery cell (30) has an explosion-proof valve (31) at at least one end along the length direction of the battery cell (30), and the bracket (100) is located between the end of the battery cell (30) with the explosion-proof valve (31) and the inner wall of the corresponding housing (40).

9. The battery pack (200) according to claim 8, characterized in that, An exhaust channel is formed on the bracket body (10), the exhaust channel extends along the arrangement direction of the plurality of battery cells (30), and the explosion-proof valve (31) is opposite to the exhaust channel.

10. The battery pack (200) according to claim 8, characterized in that, The bracket body (10) has a plurality of vent holes, and the explosion-proof valve (31) is opposite to at least one of the vent holes along the length direction of the battery cell (30).

11. The battery pack (200) according to claim 8, characterized in that, At least one through hole (101) is formed on the support body (10), the through hole (101) is located between two adjacent separators (20), and the through hole (101) is engaged with the terminal of the battery cell (30).

12. The battery pack (200) according to claim 8, characterized in that, Further includes: Encapsulating compound (41) is disposed between the inner wall of the bracket (100) and the housing (40).

13. The battery pack (200) according to claim 12, characterized in that, The potting compound (41) and the explosion-proof valve (31) are spaced apart, and the distance between the potting compound (41) and the explosion-proof valve (31) is a, wherein a satisfies: 0 < a ≤ 5 mm.

14. The battery pack (200) according to claim 12, characterized in that, The energy storage modulus of the potting compound (41) is E, and E satisfies: 100MPa<E≤2000MPa.

15. The battery pack (200) according to any one of claims 8-14, characterized in that, The battery cell (30) includes: The cell cover plate (301) is provided between the cell cover plate (301) and the housing (40), and the explosion-proof valve (31) is provided on the cell cover plate (301).

16. A vehicle, characterized in that, Includes the battery pack (200) according to any one of claims 6-15.

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