Battery tray assembly, battery pack, and electrical device

Abstract

A battery tray assembly (100), a battery pack (200), and an electrical device (90). The battery tray assembly (100) comprises a battery tray (10a), a bottom protective plate (30), and a connecting member (40). The battery tray (10a) comprises a bottom plate (10), the connecting member (40) is fixed to the surface of the bottom plate (10) facing the bottom protective plate (30), and the bottom protective plate (30) is connected to the connecting member (40).

Description

Battery tray assembly, battery pack and electrical equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 29, 2023, with application number 202323661832.1 and application name “Battery Tray Assembly, Battery Pack and Electrical Equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of battery technology, and in particular to a battery tray assembly, a battery pack including the battery tray assembly, and an electrical device including the battery pack. Background Art

[0003] In the prior art, a battery tray assembly typically includes a base plate and a bottom guard plate. The top of the base plate supports the batteries, while the bottom guard plate is positioned underneath the base plate to prevent direct damage to the base plate and the batteries from impact. The bottom guard plate is typically secured to the base plate using rivets that penetrate through the base plate and the bottom guard plate. Poor or loose riveting can allow external liquid to flow into the battery tray assembly through the rivet points, impairing the battery pack's sealing performance.

[0004] Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a battery tray assembly with improved sealing performance. Specifically, the present invention includes the following technical solutions:

[0006] In a first aspect, an embodiment of the present disclosure provides a battery tray assembly, including a battery tray, a bottom guard plate, and a connector. The battery tray includes a bottom plate, the connector is fixed to the surface of the bottom plate facing the bottom guard plate, and the bottom guard plate is connected to the connector.

[0007] The battery tray assembly disclosed herein is provided with a connector on the bottom plate of the battery tray so that the bottom plate and the bottom guard plate are fixedly connected through the connector to prevent the connection between the bottom plate and the bottom guard plate from affecting the sealing performance of the bottom plate, thereby improving the sealing performance of the battery tray assembly disclosed herein.

[0008] In one embodiment, one end of the connector is fixedly connected to the bottom plate along the direction from the bottom plate toward the bottom guard plate, and the other end is provided with a connecting hole. The battery tray assembly also includes a fastener, which passes through the bottom guard plate and is connected to the connecting hole to achieve a fixed connection between the bottom guard plate and the bottom plate.

[0009] In one embodiment, a flow channel is provided inside the bottom plate, and the flow channel is used to circulate a heat exchange medium to achieve heat exchange for the battery.

[0010] In one embodiment, the bottom plate includes a fixedly connected temperature averaging plate and a flow channel plate, the flow channel plate is located between the temperature averaging plate and the bottom guard plate, a groove is provided on the surface of the flow channel plate facing the temperature averaging plate, and the temperature averaging plate covers the groove to cooperate to form a flow channel.

[0011] In one embodiment, the connecting member is provided on a side of the flow channel plate away from the temperature uniformity plate and is fixedly connected to the flow channel plate.

[0012] In one embodiment, the flow channel plate is provided with an avoidance hole, and along the plane direction of the flow channel plate, the avoidance hole and the groove are spaced apart from each other, and the connecting piece is provided with a protrusion, which is embedded in the avoidance hole.

[0013] In one embodiment, along the plane direction of the flow channel plate, the groove is provided in the middle of the flow channel plate, and the edge areas of the flow channel plate and the temperature uniform plate are in contact with each other; a plurality of connectors are provided, and the plurality of connectors are arranged along the circumference of the flow channel plate.

[0014] In one embodiment, the temperature uniform plate is connected to the flow channel plate by brazing, and / or the flow channel plate is connected to the connecting piece by brazing.

[0015] In one embodiment, the circumferential edges of the temperature homogenizing plate and the flow channel plate extend away from the bottom guard plate and are interconnected to form side plates. The side plates and the bottom plate enclose a receiving cavity for receiving batteries.

[0016] In one embodiment, the battery tray assembly further includes a seal member, which is fitted between the bottom plate and the peripheral edge of the bottom guard plate.

[0017] In one embodiment, a circumferential edge of the bottom guard plate is provided with a flange structure facing the bottom plate, and the sealing member is attached to the inner side of the flange structure.

[0018] In one embodiment, the battery tray assembly further includes a buffer plate, which is disposed between the bottom plate and the bottom guard plate, and the buffer plate is in contact with at least the bottom plate or the bottom guard plate.

[0019] In one embodiment, a surface of the bottom guard plate away from the bottom plate is provided with a plurality of mutually spaced mounting bosses, and the plurality of mounting bosses are used for fixed connection with an external protective structure.

[0020] In one embodiment, a plurality of mutually spaced mounting portions are provided on a side of the bottom guard plate facing the bottom plate, and the mounting portions are used for fixed connection with an external protective structure.

[0021] In one embodiment, the surface of the bottom guard plate facing away from the bottom plate is coated with a protective layer.

[0022] In a second aspect, an embodiment of the present disclosure provides a battery pack, including a battery and a battery tray assembly, wherein the battery is accommodated in the battery tray assembly.

[0023] In a third aspect, an embodiment of the present disclosure provides an electrical device including a battery pack.

[0024] It can be understood that the battery pack provided in the second aspect of the present disclosure and the electrical equipment provided in the third aspect both have the effect of improving the sealing performance due to the use of the battery tray assembly provided in the first aspect of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is an exploded schematic diagram of a battery pack provided in one embodiment of the present disclosure;

[0026] FIG2 is a partial cross-sectional schematic diagram of a battery tray assembly provided in one embodiment of the present disclosure;

[0027] FIG3 is a schematic diagram of a partial structure of a battery tray assembly provided in an embodiment of the present disclosure;

[0028] FIG4 is a partially enlarged schematic diagram of a battery tray assembly provided in one embodiment of the present disclosure;

[0029] FIG5 is another partial cross-sectional schematic diagram of a battery tray assembly provided in one embodiment of the present disclosure;

[0030] FIG6 is a schematic structural diagram of a bottom guard plate provided in an embodiment of the present disclosure;

[0031] FIG7 is a partially enlarged schematic diagram of a bottom guard plate provided in an embodiment of the present disclosure;

[0032] FIG8 is another partial cross-sectional schematic diagram of a battery tray assembly provided in one embodiment of the present disclosure;

[0033] FIG9 is a structural block diagram of an electric device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] To facilitate understanding of the present disclosure, a more comprehensive description of the present disclosure will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure.

[0035] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present disclosure can be used to implement. The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present disclosure include direct and indirect connections (couplings) unless otherwise specified. The directional terms mentioned in the present disclosure, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present disclosure, 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 cannot be understood as a limitation of the present disclosure.

[0036] In the description of this disclosure, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in this disclosure based on the specific circumstances. It should be noted that the terms "first," "second," and so on, in the specification, claims, and accompanying drawings of this disclosure are used to distinguish between different objects, not to describe a specific order. Furthermore, the terms "include," "may include," "comprise," or "may include" used in this disclosure indicate the presence of the corresponding functions, operations, components, etc. disclosed, and do not limit the presence or absence of one or more additional functions, operations, components, etc. Furthermore, the terms "include" or "comprising" indicate the presence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and do not exclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusions.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0038] Please refer to FIG. 1 , which is an exploded schematic diagram of a battery pack 200 provided in one embodiment of the present disclosure.

[0039] As shown in Figure 1, the battery pack 200 of the present disclosure includes a battery 201 and a battery tray assembly 100, wherein a plurality of batteries 201 are provided. The plurality of batteries 201 are connected in series or in parallel. Since the batteries 201 connected in series can increase the voltage of the battery pack 200, and the batteries 201 connected in parallel can increase the capacity of the battery pack 200. It can be understood that the parallel or series connection of the plurality of batteries 201 can enable the individual batteries 201 to match each other, thereby forming a battery pack 200 with a certain voltage and a certain capacity to meet the different usage requirements of electrical equipment. In particular, for the convenience of description, in the subsequent embodiments of the present disclosure, the electrical equipment corresponding to the battery pack is set to a vehicle.

[0040] The battery tray assembly 100 includes a battery tray 10a, which has a accommodating cavity 10b. Multiple batteries 201 are arranged in the accommodating cavity 10b to prevent external impurities from directly acting on the outer shell of the battery 201 (not shown in the figure), thereby protecting each battery 201 and ensuring the safe use of the battery pack 200 disclosed herein.

[0041] In one embodiment, as shown in FIG1 , the battery tray 10a of the present disclosure includes a bottom plate 10 and side plates 20. The battery tray assembly 100 of the present disclosure also includes a bottom guard plate 30. The side plates 20 surround the outer edge of the bottom plate 10 and form a receiving cavity 10b to accommodate the battery 201. The bottom guard plate 30 is located on a side of the bottom plate 10 away from the receiving cavity 10b and is fixedly connected to the bottom plate 10.

[0042] Specifically, please refer to FIG2 , which is a partial cross-sectional diagram of a battery tray assembly 100 provided in an embodiment of the present disclosure, and refer to FIG1 in conjunction therewith.

[0043] As shown in Figures 1 and 2, the battery tray assembly 100 of the present disclosure further includes a connector 40, which is fixed to the surface of the bottom plate 10 facing the bottom guard plate 30. The connector 40 extends toward the bottom guard plate 30, and the bottom guard plate 30 is fixedly connected to the connector 40, thereby achieving mutual fixation between the bottom guard plate 30 and the bottom plate 10. It can be understood that the provision of the bottom guard plate 30 prevents direct damage to the bottom plate 10 by external impurities, thereby ensuring the integrity and safety of the battery 201 accommodated in the accommodating cavity 10b. This improves the protective performance of the battery tray assembly 100 of the present disclosure.

[0044] Therefore, compared with the prior art that adopts riveting to achieve the fixation of the bottom plate and the bottom guard plate, the battery tray assembly 100 disclosed in the present invention sets a connector 40 on the bottom plate 10 of the battery tray 10a. While ensuring the connection between the bottom guard plate 30 and the bottom plate 10, it avoids damage to the bottom plate 10 caused by setting riveting holes, and also avoids external liquid from entering the interior of the battery tray assembly 100 due to poor riveting or loose rivets, thereby improving the sealing performance of the battery tray assembly 100 disclosed in the present invention.

[0045] It is understood that in other embodiments, the battery tray assembly 100 of the present disclosure further includes a second connector, which is fixed to the surface of the bottom guard plate 30 facing the bottom plate 10 and extends toward the bottom plate 10. The bottom plate 10 is connected to the second connector to achieve a fixed connection between the bottom plate 10 and the bottom guard plate 30. In other embodiments, the battery tray assembly 100 of the present disclosure may include both the connector 40 and the second connector. This disclosure does not impose any particular limitation on this.

[0046] Please refer to FIG3 for a schematic diagram of a partial structure of a battery tray assembly 100 provided in one embodiment of the present disclosure, and FIG4 for an enlarged schematic diagram of a partial structure of a battery tray assembly 100 provided in one embodiment of the present disclosure. In conjunction with FIG1 and FIG2 , FIG4 is an enlarged schematic diagram of a partial structure of FIG3 .

[0047] As shown in Figures 1-4, along the arrangement of the base plate 10 and the bottom guard plate 30, one end of the connector 40 is fixedly connected to the base plate 10, and the other end is provided with a connecting hole 41. The bottom guard plate 30 is provided with a positioning hole 31. The connector 40 abuts against the surface of the bottom guard plate 30 facing the base plate 10, and the corresponding connecting hole 41 of the connector 40 is aligned with the positioning hole 31.

[0048] As shown in FIG. 2 , the external fastener 44 can extend into the connecting hole 41 through the positioning hole 31 to achieve a fixed connection between the bottom guard plate 30 and the connecting member 40 , thereby achieving a fixed connection between the bottom guard plate 30 and the bottom plate 10 .

[0049] Specifically, as shown in FIG2 , the connection hole 41 is threaded. A screw can be inserted through the positioning hole 31, into the connection hole 41, and into engagement with the internal threads of the connection hole 41 to secure the bottom guard plate 30 to the connector 40. In another embodiment, solder can be filled into the positioning hole 31 and the connection hole 41 to securely connect the bottom guard plate 30 to the connector 40 via welding. In other embodiments, the connector 40 and the bottom guard plate 30 can be secured in other ways, which are not specifically limited by this disclosure.

[0050] In one embodiment, as shown in Figures 1 to 4, a flow channel 11 is further provided inside the bottom plate 10, and the flow channel 11 is connected to an external heat exchange medium source. During the use of the battery pack 200, the batteries 201 in the battery tray assembly 100 will emit heat, and this heat may affect the performance of the batteries 201. It can be understood that the flow channel 11 is provided in the bottom plate 10, so that the heat exchange medium in the external heat exchange medium source can flow into the flow channel 11, and the heat of the batteries 201 can be dissipated through the bottom plate 10, thereby reducing the overall temperature of the battery pack 200 and ensuring the performance of the battery pack 200 disclosed in the present invention.

[0051] Specifically, in one embodiment, as shown in Figures 2-4 , the base plate 10 includes a temperature averaging plate 12 and a flow channel plate 13. Along the arrangement of the base plate 10 and the bottom guard plate 30, the flow channel plate 13 is located between the temperature averaging plate 12 and the bottom guard plate 30. A groove 131 is defined on the surface of the flow channel plate 13 facing the temperature averaging plate 12. The temperature averaging plate 12 covers the groove 131 to form the flow channel 11.

[0052] During the use of the battery pack 200, the heat generated by the battery 201 will be transferred to the temperature equalizing plate 12. This part of the heat will diffuse to the surroundings along the plane direction of the temperature equalizing plate 12 and be absorbed by different heat exchange media in the groove 131 respectively, thereby realizing the heat dissipation function of the battery 201.

[0053] At the same time, as shown in Figures 2 to 4, the connector 40 is provided on the side of the flow channel plate 13 away from the temperature equalizer 12 and is fixedly connected to the flow channel plate 13. It can be understood that fixing the connector 40 on the side of the flow channel plate 13 away from the temperature equalizer 12 can avoid the influence of the setting of the connector 40 on the temperature equalizer 12, and avoid the damage to the sealing performance of the bottom plate 10 during the connection between the bottom plate 10 and the bottom guard plate 30. Therefore, while ensuring the fixed connection between the bottom plate 10 and the bottom guard plate 30 and the heat dissipation function of the bottom plate 10, the sealing performance of the battery tray assembly 100 of the present disclosure is guaranteed.

[0054] Specifically, please refer to FIG5 , which is another partial cross-sectional view of a battery tray assembly 100 provided in an embodiment of the present disclosure, and refer to FIG2 and FIG4 , where FIG5 is a partial cross-sectional view of FIG4 .

[0055] As shown in Figures 2, 4, and 5, the flow channel plate 13 is also provided with an avoidance hole 132. Along the planar direction of the flow channel plate 13, the avoidance hole 132 and the groove 131 are spaced apart from each other. The end of the connecting member 40 away from the connecting hole 41 is provided with a protrusion 42. The protrusion 42 extends toward the flow channel plate 13 and is embedded in the avoidance hole 132.

[0056] During the installation of the connector 40, it is necessary to ensure that the connector 40 is in contact with the flow channel plate 13. It is understood that the provision of the raised portion 42 can increase the contact area between the connector 40 and the flow channel plate 13, thereby increasing the connection area between the connector 40 and the flow channel plate 13, preventing the connector 40 from falling off the flow channel plate 13 during use, and improving the connection reliability between the connector 40 and the flow channel plate 13. This further improves the connection reliability between the bottom plate 10 and the bottom guard plate 30, and enhances the sealing performance of the battery tray assembly 100 disclosed herein.

[0057] Furthermore, the spacing between the avoidance hole 132 and the groove 131 prevents external liquid from entering the groove 131 through the avoidance hole 132, thereby contaminating the heat exchange efficiency of the heat exchange medium. This also prevents the heat exchange medium from leaking out and affecting the sealing performance of the battery tray assembly 100. Furthermore, the matching arrangement of the avoidance hole 132 and the protrusion 42 improves the positioning efficiency of the connector 40, thereby enhancing the assembly efficiency of the battery tray assembly 100 of the present disclosure.

[0058] In one embodiment, the connector 40 and the flow channel plate 13 can be fixedly connected by welding. In other embodiments, the connector 40 and the flow channel plate 13 can be connected by other methods. For example, the connector 40 and the flow channel plate 13 are connected by bonding. This disclosure does not impose any particular limitation on this.

[0059] In one embodiment, as shown in Figures 2 to 4, the groove 131 is provided in the middle of the flow channel plate 13 along the plane direction of the flow channel plate 13, and the edge area of ​​the flow channel plate 13 where the groove 131 is not provided and the edge area of ​​the temperature equalizing plate 12 are fitted together to avoid the possibility of the heat exchange medium flowing in the groove 131 flowing out from between the flow channel plate 13 and the temperature equalizing plate 12, thereby further improving the sealing performance of the battery tray assembly 100 disclosed in the present invention.

[0060] There are multiple connectors 40, which are spaced apart. There are also multiple avoidance holes 132, which are equal in number to the connectors 40. The avoidance holes 132 are arranged along the circumference of the flow channel plate 13, and the protrusion 42 of each connector 40 is embedded in one of the avoidance holes 132.

[0061] The bottom guard plate 30 is fixedly connected to the bottom plate 10 via the connector 40. It is understood that the provision of multiple connectors 40 improves the reliability of the connection between the bottom guard plate 30 and the bottom plate 10, and avoids the possibility of damage to a single connector 40 affecting the connection between the bottom guard plate 30 and the bottom plate 10. This improves the reliability of the battery tray assembly 100 of the present disclosure.

[0062] In one embodiment, the temperature averaging plate 12 and the flow channel plate 13 are connected by brazing. The flow channel plate 13 and the connector 40 are also connected by brazing. It is understood that in other embodiments, the temperature averaging plate 12 and the flow channel plate 13 may be connected in other ways. In other embodiments, the flow channel plate 13 and the connector 40 may be connected in other ways. This disclosure does not impose any particular limitations on this.

[0063] In one embodiment, please refer back to Figures 1 and 3. Along the arrangement direction of the temperature equalizing plate 12 and the flow channel plate 13, the circumferential edge of the temperature equalizing plate 12 extends in the direction away from the bottom guard plate 30, and the circumferential edge of the flow channel plate 13 also extends in the direction away from the bottom guard plate 30, and the extended temperature equalizing plate 12 and the flow channel plate 13 are fitted together to form a side plate 20, so as to cooperate with the bottom plate 10 to form a battery tray 10a with a accommodating cavity 10b.

[0064] In one embodiment, as shown in Figures 1 and 2, the battery tray assembly 100 of the present disclosure further includes a seal 50, which is disposed between the circumferential edges of the bottom plate 10 and the bottom guard plate 30 and is respectively in contact with the bottom plate 10 and the bottom guard plate 30. The seal 50 is annular and surrounds the middle portions of the bottom plate 10 and the bottom guard plate 30 to seal the space between the bottom plate 10 and the bottom guard plate 30.

[0065] During vehicle operation, external liquid impurities may enter between the bottom plate 10 and the bottom guard plate 30 and remain there, potentially corroding the bottom plate 10 and the bottom guard plate 30. Furthermore, external solid impurities may also enter between the bottom plate 10 and the bottom guard plate 30, potentially damaging the bottom plate 10 and affecting the sealing effect of the battery tray assembly 100.

[0066] It can be understood that the provision of the seal 50 eliminates the communication path between the gap between the bottom plate 10 and the bottom guard plate 30 and the external environment, thereby preventing external impurities from entering between the bottom plate 10 and the bottom guard plate 30. This reduces the impact of external impurities on the sealing performance of the bottom plate 10, thereby improving the sealing performance of the battery tray assembly 100 of the present disclosure.

[0067] In one embodiment, as shown in Figures 1 and 2, the circumferential edge of the bottom guard plate 30 is provided with a flange structure 32 facing the bottom plate 10, and the seal 50 is attached to the inner side of the flange structure 32. The distance between the flange structure 32 and the bottom plate 10 is smaller than the distance between the middle portion of the bottom plate 10 and the bottom guard plate 30.

[0068] It is understood that providing the flange structure 32 on the bottom guard plate 30 can reduce the distance between the edge areas of the bottom guard plate 30 and the bottom plate 10, further reducing the possibility of external impurities entering between the bottom guard plate 30 and the bottom plate 10 through the gap between the bottom guard plate 30 and the bottom plate 10. At the same time, providing the seal 50 between the flange structure 32 and the bottom plate 10 can achieve the fixation of the seal 50 while further improving the sealing performance of the battery tray assembly 100 of the present disclosure.

[0069] In the embodiment of the present disclosure, the circumferential edge of the bottom plate 10 may also be flanged in a direction away from the accommodating cavity 10b, so as to reduce the distance between the edge areas of the bottom plate 10 and the bottom guard plate 30. It is understood that in other embodiments, the distance between the edge areas of the bottom plate 10 and the bottom guard plate 30 may be reduced in other ways, and the present disclosure does not impose any particular limitation on this.

[0070] In one embodiment, as shown in Figures 1 and 2, the battery tray assembly 100 of the present disclosure further includes a buffer plate 60, which is located between the bottom plate 10 and the bottom guard plate 30 and is in contact with the bottom plate 10 and the bottom guard plate 30. The buffer plate 60 is elastic. When external impurities act on the bottom guard plate 30, the impact force of the external impurities on the bottom guard plate 30 will be transmitted to the bottom plate 10 via the connector 40. It can be understood that the provision of the elastic buffer plate 60 can enable the impact of external impurities acting on the bottom guard plate 30 to act on the buffer plate 60 and be absorbed by the buffer plate 60, thereby reducing the impact on the bottom plate 10.

[0071] That is, the provision of the elastic buffer plate 60 further prevents external impurities from damaging the bottom plate 10, thereby ensuring the integrity and safety of the battery 201 and further improving the protective performance of the battery tray assembly 100 of the present disclosure.

[0072] It is understandable that in other embodiments, the buffer plate 60 may also be only in contact with the bottom plate 10, or only in contact with the bottom guard plate 30. This disclosure does not impose any particular limitation on this.

[0073] In one embodiment, the seal 50 is elastic. Since the seal 50 is held between the bottom plate 10 and the bottom guard plate 30, the bottom guard plate 30 will deform in the direction of the bottom guard plate 30 toward the bottom plate 10 when subjected to external impact. It is understood that the provision of the elastic seal 50 allows the impact on the bottom guard plate 30 to be absorbed by the seal 50 when it is transmitted to the seal 50, further reducing the impact of external impact on the bottom plate 10 and further improving the protective performance of the battery tray assembly 100 of the present disclosure.

[0074] At the same time, the setting of the elastic seal 50 can also ensure the abutment relationship between the bottom plate 10 and the bottom guard plate 30, further improving the sealing effect of the seal 50 on the buffer plate 60 during the use of the battery tray assembly 100 disclosed in the present invention, thereby further improving the sealing performance of the battery tray assembly 100 disclosed in the present invention.

[0075] On the other hand, the hardness of the seal 50 is lower than that of the buffer plate 60. Because both the seal 50 and the buffer plate 60 are elastic, they will deform during use. Material hardness is one of the factors that directly influences material deformation. The greater the material's hardness, the greater its resistance to intrusion and the more difficult it is to deform.

[0076] Given the close fit between the buffer plate 60, the base plate 10, and the bottom guard plate 30, it is understandable that if the hardness of the buffer plate 60 is too low, the buffer plate 60 will experience a significant deformation when absorbing external impacts on the bottom guard plate 30. Furthermore, the limited spacing between the base plate 10 and the bottom guard plate 30 may result in external impacts acting on the bottom guard plate 30 being directly applied to the base plate 10 before being fully absorbed by the buffer plate 60.

[0077] That is, when the hardness of the buffer plate 60 is too low, the absorption rate of the buffer plate 60 to external impact is reduced, resulting in reduced protection performance of the buffer plate 60 to the bottom plate 10, thereby affecting the protection performance of the battery tray assembly 100 of the present disclosure.

[0078] At the same time, when the hardness of the seal 50 is too high, it is difficult for the seal 50 to deform when it is set on the bottom plate 10 and the bottom guard plate 30, making it difficult to ensure the abutment relationship between the seal 50 and the bottom plate 10 and the bottom guard plate 30, affecting the sealing of the seal 50 on the buffer plate 60 and affecting the sealing performance of the battery tray assembly 100 disclosed in the present invention.

[0079] Therefore, setting the hardness of the seal 50 to be lower than the hardness of the buffer plate 60 can improve the buffer plate 60's absorption efficiency of the impact on the bottom guard plate 30, further reduce the impact of external impact on the bottom plate 10, and further improve the protective performance of the battery tray assembly 100 disclosed in the present invention.

[0080] On the other hand, it can also reduce the difficulty of installing the seal 50, ensure the deformation of the seal 50 between the base plate 10 and the bottom guard plate 30, ensure the abutment relationship between the seal 50 and the base plate 10 and the bottom guard plate 30, thereby ensuring the sealing effect of the seal 50 on the buffer plate 60, and ensuring the improvement of the sealing performance of the battery tray assembly 100 disclosed in the present invention.

[0081] In one embodiment, the compression of the seal 50 is greater than or equal to the compression of the buffer plate 60. Since the hardness of the seal 50 is less than that of the buffer plate 60, and the greater the hardness, the more difficult it is to deform, it is understandable that when the compression of the seal 50 is less than that of the buffer plate 60, the seal 50 may fail to seal during use if the gap between the bottom plate 10 and the bottom guard plate 30 expands due to external impact.

[0082] As for the buffer plate 60, a larger compression amount will increase the difficulty of setting the buffer plate 60. Since the buffer plate 60 is elastic, it is understandable that a larger compression amount will cause a larger elastic force to be stored inside the buffer plate 60. Part of this elastic force may act on the connection between the bottom guard plate 30 and the connector 40 through the bottom guard plate 30, affecting the connection between the bottom guard plate 30 and the bottom plate 10. The other part may directly act on the battery 201 in the accommodating cavity 10b through the bottom plate 10, thereby affecting the safe use of the battery 201.

[0083] Therefore, setting the compression amount of the seal 50 to be greater than or equal to the compression amount of the buffer plate 60 can ensure the abutment relationship between the seal 50 and the bottom plate 10 and the bottom guard plate 30 during use, ensure the sealing effect of the seal 50 on the buffer plate 60, and ensure the improvement of the sealing performance of the battery tray assembly 100 disclosed in the present invention.

[0084] At the same time, the impact of the elastic force stored in the compressed buffer plate 60 on the connection between the bottom plate 10 and the bottom guard plate 30 can be reduced, as well as the elastic force directly acting on the bottom plate 10 by the buffer plate 60, thereby ensuring the protective performance of the battery tray assembly 201 of the present disclosure.

[0085] In one embodiment, in its natural state, the thickness of the buffer plate 60 is between 3 mm and 15 mm. It is understood that when the buffer plate 60 is less than 3 mm thick, its ability to absorb external impacts is low, and its ability to mitigate external impacts is reduced, thereby reducing the protective effect of the battery tray assembly 100 of the present disclosure. Furthermore, if the spacing between the bottom plate 10 and the bottom guard plate 30 remains unchanged, a buffer plate 60 thickness of less than 3 mm may make it difficult to ensure sufficient compression between the bottom plate 10 and the bottom guard plate 30.

[0086] On the other hand, under the premise that the distance between the bottom plate 10 and the bottom guard plate 30 remains unchanged, when the thickness of the buffer plate 60 is greater than 15 mm, the compression amount of the buffer plate 60 between the bottom plate 10 and the bottom guard plate 30 will increase, thereby increasing the difficulty of installing the buffer plate 60 and increasing the elastic force stored in the buffer plate 60, which may affect the connection relationship between the bottom plate 10 and the bottom guard plate 30, as well as the safety of use of the battery 201 in the accommodating cavity 10b.

[0087] However, if the compression of the buffer plate 60 remains constant, a thickness of the buffer plate 60 greater than 15 mm will increase the distance between the bottom plate 10 and the bottom guard plate 30, thereby reducing the capacity of the batteries 201 within the battery tray assembly 100. Furthermore, the increased distance between the bottom plate 10 and the bottom guard plate 30 increases the distance between the vehicle chassis and the bottom surface, thus affecting user comfort. Furthermore, the increased thickness of the buffer plate 60 will also increase the manufacturing cost of the disclosed battery tray assembly 100.

[0088] Therefore, the battery tray assembly 100 disclosed in the present invention can reduce manufacturing costs, ensure the spacing between the base plate 10 and the bottom guard plate 30, and reduce the elastic force of the buffer plate 60 on the base plate 10 by setting the thickness of the buffer plate 60 to between 3mm-15mm, while ensuring the absorption efficiency of the buffer plate 60 against external impacts and ensuring the protective performance of the battery tray assembly 100 disclosed in the present invention.

[0089] In this and subsequent embodiments, the thickness of a structure in its natural state refers to the thickness of the structure at room temperature and pressure, without tension or pressure other than gravity. In this embodiment, the thickness of the buffer plate 60 in its natural state refers to the thickness of the buffer plate 60 at room temperature and pressure, without tension or pressure.

[0090] In one embodiment, in a natural state, the thickness of the seal 50 is between 5 mm and 15 mm. It is understood that when the thickness of the seal 50 is less than 5 mm, and under the premise that the spacing between the bottom plate 10 and the bottom guard plate 30 remains unchanged, it may be difficult to ensure the compression of the seal 50 between the bottom plate 10 and the bottom guard plate 30. As a result, the seal 50 may be unable to seal the buffer plate 60 during use, thereby affecting the sealing performance of the battery tray assembly 100 of the present disclosure.

[0091] On the other hand, when the thickness of the sealing member 50 is greater than 15 mm, the manufacturing cost of the sealing member 50 may increase, thereby increasing the manufacturing cost of the battery tray assembly 100 of the present disclosure.

[0092] Therefore, the battery tray assembly 100 disclosed in the present invention can reduce manufacturing costs while ensuring the sealing effect of the seal 50 on the buffer plate 60 by setting the thickness of the seal 50 between 5mm-15mm, thereby ensuring that the seal 50 improves the sealing performance of the battery tray assembly 100 disclosed in the present invention.

[0093] In one embodiment, the seal 50 is annular along the plane of the base plate 10 and has a thickness greater than or equal to 6 mm. It is understood that if the seal 50 is less than 6 mm thick, it may be damaged by external impurities, resulting in sealing failure. Furthermore, during use, the seal 50 may also deform and break, leading to sealing failure.

[0094] Therefore, the battery tray assembly 100 disclosed in the present invention sets the thickness of the seal 50 to be greater than or equal to 6 mm, which can avoid sealing failure due to too small thickness during use, thereby ensuring the sealing of the buffer plate 60 by the seal 50 and ensuring that the sealing performance of the battery tray assembly 100 disclosed in the present invention is improved by the seal 50.

[0095] Please refer to the structural schematic diagram of the bottom guard plate 30 provided in an embodiment of the present disclosure shown in Figure 6, please refer to the partially enlarged schematic diagram of the bottom guard plate 30 provided in an embodiment of the present disclosure shown in Figure 7, and please refer to another partial cross-sectional schematic diagram of the battery tray assembly 100 provided in an embodiment of the present disclosure shown in Figure 8.

[0096] As shown in Figures 6-8 , the bottom guard plate 30 has multiple mounting bosses 33 protruding from the surface facing away from the base plate 10. The mounting bosses 33 are spaced apart from one another. The side of the bottom guard plate 30 facing the base plate 10 has multiple mounting portions 34 spaced apart from one another, with each mounting boss 33 aligned with a mounting portion 34. The bottom guard plate 30 also has multiple mounting holes 35, each extending sequentially through the mounting bosses 33 and the mounting portions 34.

[0097] Among them, each mounting hole 35 is provided with a thread, and the external screw can pass through the external protective structure (such as the mudguard) and the mounting hole 35 in turn, and cooperate with the thread in the mounting hole 35 to achieve a fixed connection between the external protective structure and the bottom guard plate 30.

[0098] It is understood that in another embodiment, the external protective structure can also be fixedly connected to the bottom guard plate 30 by rivets passing through the external protective structure and the mounting holes 35, and cooperating with the mounting holes 35. In other embodiments, the mounting holes 35 are filled with solder to facilitate welding the external protective structure to the mounting bosses 33. In other embodiments, the external protective structure and the bottom guard plate 30 can be fixedly connected in other ways, which are not particularly limited in this disclosure.

[0099] In the embodiment of the present disclosure, the external protective structure can be used to further reduce the impact of external impurities on the bottom guard plate, further improving the protective performance of the battery tray assembly 100. Exemplarily, the external protective structure is a fender.

[0100] Therefore, compared with the prior art in which the mounting point connected to the external protective structure is set on the side panel, the battery tray assembly 100 disclosed in the present invention provides the mounting boss 33 and the mounting portion 34 on the bottom guard plate 30, so that the mounting boss 33 and the mounting portion 34 can be prepared by integral molding, reducing the process required to separately provide the mounting structure on the side panel 20, thereby reducing costs.

[0101] At the same time, since the side plate 20 is composed of the temperature averaging plate 12 and the flow channel plate 13 that are bonded to each other, it is understandable that, compared to the prior art, the installation of the mounting boss 33 and the mounting portion 34 on the bottom guard plate 30 can also prevent the installation of the mounting boss 33 and the mounting portion 34 from affecting the connection between the temperature averaging plate 12 and the flow channel plate 13, thereby improving the stability of the battery tray assembly 100 of the present disclosure.

[0102] On the other hand, the mounting boss 33 is provided on the bottom guard plate 30 , which can also increase the contact area between the external protective structure and the battery tray assembly 100 , so as to facilitate the positioning of the external protective structure and enhance the connection stability between the bottom guard plate 30 and the external protective structure.

[0103] In other embodiments, the bottom guard plate 30 of the battery tray assembly 100 may be provided with only a mounting boss 33 for fixed connection to the external protective structure, or may be provided with only a mounting portion 34 for fixed connection to the external protective structure.

[0104] In one embodiment, as shown in FIG8 , the battery tray assembly 100 of the present disclosure further includes a protective layer 70, which is coated on the surface of the bottom guard plate 30 away from the bottom plate 10. The protective layer 70 is made of polyvinyl chloride material. Polyvinyl chloride material has good wear resistance. It can be understood that the provision of the protective layer 70 can improve the wear resistance of the bottom guard plate 30 and prevent the phenomenon of external solid impurities scratching the bottom guard plate 30 during the operation of the vehicle, thereby ensuring the integrity of the bottom guard plate 30. The protective performance of the battery tray assembly 100 of the present disclosure is further improved.

[0105] FIG9 is a structural block diagram of an electric device 90 provided in an embodiment of the present disclosure.

[0106] The present disclosure provides an electrical device 90, including a battery pack, such as battery pack 200 shown in FIG1 . For example, the electrical device 90 is a vehicle, which includes a vehicle body and battery pack 200, which is housed within the vehicle body to provide electrical energy for the vehicle. It is understood that in other embodiments, the battery pack of the present disclosure may also be applied to other electrical devices, and this disclosure does not impose any particular limitation thereto.

[0107] It should be understood that the terms "first," "second," etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present disclosure, "plurality" means two or more, unless otherwise specifically defined.

[0108] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0109] It should be understood that the application of the present disclosure is not limited to the above examples. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the scope of protection of the appended claims of the present disclosure. Those skilled in the art will understand that implementing all or part of the processes of the above embodiments and making equivalent changes in accordance with the claims of the present disclosure still fall within the scope of the present disclosure.

Claims

1. A battery tray assembly (100), characterized in that, It includes a battery tray (10a), a bottom guard plate (30), and a connecting member (40). The battery tray (10a) includes a bottom plate (10). The connecting member (40) is fixed to the surface of the bottom plate (10) facing the bottom guard plate (30), and the bottom guard plate (30) is connected to the connecting member (40).

2. The battery tray assembly (100) according to claim 1, characterized in that, Along the direction of the bottom plate (10) facing the bottom guard plate (30), one end of the connecting member (40) is fixedly connected to the bottom plate (10), and the other end is provided with a connection hole (41). The battery tray assembly (100) further includes a fastener (44). The fastener (44) passes through the bottom guard plate (30) and is connected to the connection hole (41) to realize the fixed connection between the bottom guard plate (30) and the bottom plate (10).

3. The battery tray assembly (100) according to claim 1 or 2, characterized in that, A flow channel (11) is provided inside the bottom plate (10). The flow channel (11) is used for circulating a heat exchange medium to realize heat exchange of the battery (201).

4. The battery tray assembly (100) according to claim 3, characterized in that, The bottom plate (10) includes a heat dissipation plate (12) and a flow channel plate (13) fixedly connected. The flow channel plate (13) is located between the heat dissipation plate (12) and the bottom guard plate (30). A groove (131) is provided on the surface of the flow channel plate (13) facing the heat dissipation plate (12), and the heat dissipation plate (12) covers the groove (131) to cooperate to form the flow channel (11).

5. The battery tray assembly (100) according to claim 4, wherein The connecting member (40) is provided on the side of the flow channel plate (13) away from the heat dissipation plate (12) and is fixedly connected to the flow channel plate (13).

6. The battery tray assembly (100) according to claim 4, characterized in that, The flow channel plate (13) is provided with an avoidance hole (132). Along the plane direction of the flow channel plate (13), the avoidance hole (132) and the groove (131) are spaced from each other. The connecting member (40) is provided with a protrusion (42), and the protrusion (42) is embedded in the avoidance hole (132).

7. The battery tray assembly (100) according to claim 4, characterized in that, Along the plane direction of the flow channel plate (13), the groove (131) is provided in the middle of the flow channel plate (13), and the edge regions of the flow channel plate (13) and the heat dissipation plate (12) are mutually attached; A plurality of the connecting members (40) are provided, and the plurality of connecting members (40) are arranged in a circumferential arrangement along the flow channel plate (13).

8. The battery tray assembly (100) according to claim 4, characterized in that, The heat dissipation plate (12) and the flow channel plate (13) are connected by brazing, and / or the flow channel plate (13) and the connecting member (40) are connected by brazing.

9. The battery tray assembly (100) according to claim 4, wherein, The circumferential edges of the heat dissipation plate (12) and the flow channel plate (13) both extend in a direction away from the bottom guard plate (30) and are mutually connected to form a side plate (20). The side plate (20) and the bottom plate (10) enclose a receiving cavity (10b), and the receiving cavity (10b) is used for receiving the battery (201).

10. The battery tray assembly (100) according to claim 1 or 2, characterized in that, The battery tray assembly (100) further includes a seal (50). The seal (50) is attached between the circumferential edges of the bottom plate (10) and the bottom guard plate (30).

11. The battery tray assembly (100) according to claim 10, characterized in that, The circumferential edge of the bottom guard plate (30) is provided with a flanging structure (32) facing the bottom plate (10), and the seal (50) is attached to the inner side of the flanging structure (32).

12. The battery tray assembly (100) according to claim 1 or 2, characterized in that, The battery tray assembly (100) further includes a buffer plate (60), the buffer plate (60) is disposed between the bottom plate (10) and the bottom guard plate (30), and the buffer plate (60) is at least in contact with the bottom plate (10) or the bottom guard plate (30).

13. The battery tray assembly (100) according to claim 1 or 2, characterized in that, A plurality of mounting bosses (33) spaced apart from each other are provided on the surface of the bottom guard plate (30) away from the bottom plate (10), and the plurality of mounting bosses (33) are used for fixedly connecting with an external protection structure.

14. The battery tray assembly (100) according to claim 1 or 2, characterized in that, A plurality of mounting portions (34) spaced apart from each other are provided on one side of the bottom guard plate (30) facing the bottom plate (10), and the mounting portions (34) are used for fixedly connecting with an external protection structure.

15. The battery tray assembly (100) according to claim 1 or 2, characterized in that, A protective layer (70) is coated on the surface of the bottom guard plate (30) away from the bottom plate (10).

16. A battery pack (200), characterized in that, It includes a battery (201) and the battery tray assembly (100) according to any one of claims 1-15, and the battery (201) is received in the battery tray assembly (100).

17. An electrical device (90), characterized in that, It includes a battery pack (200) according to claim 16.

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