Battery tray assembly, battery pack and electric equipment

Abstract

The utility model relates to a battery tray assembly, a battery pack and electric equipment, the battery tray assembly comprises a battery tray and a reinforcing member, at least one end of the battery tray along a first direction is provided with a cavity, the cavity is located in the battery tray, the reinforcing member is arranged in the cavity, and the reinforcing member is arranged in the cavity along the first direction. And a first gap is formed between one side, far away from the center of the battery tray, of the cavity and the reinforcing piece positioned in the cavity. According to the battery tray, the reinforcer can be arranged in the cavity, and the first gap is formed between the reinforcer and the side, far away from the center of the battery tray, of the cavity, so that the structural strength of the battery tray can be improved, and the overall rigidity and strength of the battery pack can be improved. Moreover, the reinforcing pieces and the first gaps can be used for playing roles in energy absorption and buffering, and the reinforcing pieces and the first gaps are used for jointly absorbing the impact on the battery tray, so that the collision resistance of the battery pack can be improved, the damage to the battery cells contained in the battery tray can be reduced, and the safety of the battery pack can be improved.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular, to a battery tray assembly, a battery pack, and an electrical device. Background Art

[0002] Existing battery packs consist of a tray and a top cover, with the battery cells housed within the tray's cavity. However, existing trays lack rigidity and strength, and have poor collision resistance. When subjected to external impact, the tray can easily break, potentially damaging the internal battery cells and compromising the safety of the battery pack. Utility Model Content

[0003] The purpose of the present disclosure is to provide a battery tray assembly, a battery pack, and an electrical device to solve the technical problems existing in the related art.

[0004] To achieve the above objectives, according to a first aspect of the present disclosure, a battery tray assembly is provided, comprising a battery tray and a reinforcement member, wherein at least one end of the battery tray along a first direction is provided with a cavity, the cavity being located inside the battery tray, and the reinforcement member being provided within the cavity;

[0005] In the first direction, a first gap is formed between a side of the cavity away from the center of the battery tray and the reinforcement member located in the cavity.

[0006] Optionally, the cavity has a first wall and a second wall opposite to each other in a height direction of the battery tray, and the height direction is perpendicular to the first direction;

[0007] The reinforcement member is a corrugated member, and the reinforcement member contacts at least one of the first wall and the second wall.

[0008] Optionally, the reinforcement has a crest portion and a trough portion;

[0009] The peak portion contacts the first wall, and / or the trough portion contacts the second wall.

[0010] Optionally, the crest portion contacts the first wall surface; and / or,

[0011] The trough portion is in contact with the second wall surface.

[0012] Optionally, the first wall has a plane, the crest portion has a first plane, and the first plane is in surface contact with the plane of the first wall; and / or,

[0013] The second wall has a plane, the trough portion has a second plane, and the second plane is in surface contact with the plane of the second wall.

[0014] Optionally, the width of the first plane is equal to the width of the second plane.

[0015] Optionally, the width of the first plane is 1.2 mm to 5 mm; and / or,

[0016] The width of the second plane is 1.2 mm to 5 mm.

[0017] Optionally, the width of the crest portion is equal to the width of the trough portion, and the wave pitch of the reinforcement is not greater than three times the width of the crest portion.

[0018] Optionally, the reinforcement further comprises a first connecting portion and a second connecting portion, and the number of the crest portion and the number of the trough portion are both multiple;

[0019] One end of the first connecting portion is connected to one of the two adjacent trough portions, and the other end of the first connecting portion is connected to a first side of the crest portion located between the two adjacent trough portions;

[0020] One end of the second connecting portion is connected to the second side of the crest portion located between the two adjacent trough portions, and the other end of the second connecting portion is connected to the other of the two adjacent trough portions;

[0021] The first side and the second side are two sides of the crest portion in a width direction.

[0022] Optionally, the first connecting portion and the crest portion connected thereto are arranged vertically, and the first connecting portion and the trough portion connected thereto are arranged vertically; and / or,

[0023] The second connecting portion and the crest portion connected thereto are arranged at an obtuse angle, and the second connecting portion and the trough portion connected thereto are both arranged at an obtuse angle.

[0024] Optionally, the orthographic projection of the crest portion on a plane perpendicular to the height direction is wavy; and / or,

[0025] The orthographic projection of the trough portion on a plane perpendicular to the height direction is wavy.

[0026] Optionally, there are multiple crest portions and multiple trough portions;

[0027] The plurality of crest portions and the plurality of trough portions are alternately arranged in sequence along a second direction, and the second direction intersects with the first direction.

[0028] Optionally, the first direction is one of a width direction and a length direction of the battery tray, and the second direction is the other of the width direction and the length direction of the battery tray.

[0029] Optionally, the reinforcement is made of aluminum alloy.

[0030] Optionally, the reinforcement includes a reinforcement body and a covering layer, the covering layer is covered on the outer surface of the reinforcement body, and the material of the reinforcement body includes 3 series aluminum alloy.

[0031] Optionally, the material of the coating layer includes 4 series aluminum alloy.

[0032] Optionally, the thickness of the reinforcement is 0.2 mm to 1 mm.

[0033] Optionally, the thickness of the coating layer is 10% to 18% of the thickness of the reinforcement.

[0034] Optionally, the reinforcement is connected to the first wall by welding, and / or the reinforcement is connected to the second wall by welding.

[0035] Optionally, the reinforcement is connected to the first wall by brazing, and / or the reinforcement is connected to the second wall by brazing.

[0036] Optionally, the cavity is provided at at least one end of the battery tray in the second direction, and the reinforcement is provided in the cavity;

[0037] The second direction is perpendicular to the first direction.

[0038] Optionally, in the first direction, a second gap is provided between a side of the cavity close to the center of the battery tray and the reinforcement member located in the cavity.

[0039] Optionally, the first gap is larger than the second gap.

[0040] Optionally, a flow channel is further provided in the battery tray, and along the first direction, the flow channel is located on one side of the cavity.

[0041] Optionally, in the first direction, the cavities are provided on both sides of the battery tray, and the flow channel is located between the two cavities.

[0042] Optionally, the battery tray has a receiving cavity for receiving a battery cell;

[0043] On a plane perpendicular to the first direction, an orthographic projection of the flow channel away from the bottom wall of the accommodating cavity is located between an orthographic projection of the cavity away from the bottom wall of the accommodating cavity and an orthographic projection of the bottom wall of the accommodating cavity.

[0044] Optionally, the battery tray includes a heat conducting plate and a flow channel plate connected to each other, the heat conducting plate includes a first heat conducting portion and a second heat conducting portion arranged and connected along the first direction, and the flow channel plate includes a first plate portion and a second plate portion arranged and connected along the first direction;

[0045] The flow channel is defined between the first heat conducting portion and the first plate portion;

[0046] The cavity is defined between the second heat conducting portion and the second plate portion.

[0047] Optionally, the first heat conducting portion and the second heat conducting portion are integrally formed; and / or,

[0048] The first plate portion and the second plate portion are integrally formed.

[0049] Optionally, the flow channel and the cavity are not connected.

[0050] Optionally, the first plate portion is provided with a first protrusion toward the first heat conducting portion, and the first protrusion is connected to the first heat conducting portion to separate the flow channel and the cavity.

[0051] Optionally, the first plate portion is provided with a plurality of spaced second protrusions facing the first heat conducting portion, and the plurality of second protrusions are all connected to the first heat conducting portion to define the flow channel.

[0052] Optionally, the second heat conducting portion includes a first bottom plate, a first side plate, and a first flange arranged and connected along the first direction, the first side plate being connected to an end of the first bottom plate away from the first heat conducting portion, and the first flange being connected to an end of the first side plate away from the first bottom plate;

[0053] The first heat conducting portion, the first bottom plate and the first side plate enclose a receiving cavity, and the receiving cavity is suitable for receiving a battery cell;

[0054] The second plate portion includes a second bottom plate, a second side plate, and a second flange arranged and connected along the first direction, the second side plate being connected to an end of the second bottom plate away from the first plate portion, and the second flange being connected to an end of the second side plate away from the second bottom plate;

[0055] The cavity is defined between the first bottom plate, the second bottom plate, the first side plate, the second side plate, and the first protruding portion;

[0056] The first flange is connected to the second flange to close the cavity.

[0057] Optionally, the first bottom plate, the first side plate and the first flange are integrally formed; and / or,

[0058] The second bottom plate, the second side plate and the second flange are integrally formed.

[0059] Optionally, the first bottom plate and the first side plate are connected by an arc, and / or

[0060] The first side plate and the first flange are connected by an arc, and / or

[0061] The second bottom plate and the second side plate are connected by an arc, and / or

[0062] The second side plate is connected to the second flange by an arc.

[0063] According to a second aspect of the present disclosure, there is provided a battery pack, comprising a battery cell and the above-mentioned battery tray assembly, wherein the battery tray is provided with a receiving cavity;

[0064] The battery core is arranged in the accommodating cavity.

[0065] According to a third aspect of the present disclosure, there is provided an electrical device comprising the above-mentioned battery pack.

[0066] In the present disclosure, a reinforcement member can be disposed within the cavity, and a first gap can be provided between the reinforcement member and the side of the cavity away from the center of the battery tray. Providing the reinforcement member can, to a certain extent, support the cavity, thereby facilitating improvement of the structural strength of the battery tray, and thereby improving the overall rigidity and strength of the battery pack. Furthermore, the reinforcement member and the first gap can be utilized to absorb energy and provide a buffer, so that when the battery tray is impacted, the reinforcement member and the first gap can jointly absorb the impact on the battery tray, thereby improving the anti-collision capability of the battery tray and the battery pack, reducing damage to the cells contained in the battery tray, and thereby improving the safety of the battery pack.

[0067] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0069] Figure 1 is a three-dimensional schematic diagram of a battery tray provided in one embodiment of the present disclosure;

[0070] Figure 2 is an exploded schematic diagram of a battery tray provided in one embodiment of the present disclosure;

[0071] Figure 3 yes Figure 2A partial enlarged schematic diagram of point A in the middle;

[0072] Figure 4 is a schematic diagram of a three-dimensional structure of a battery tray provided by an embodiment of the present disclosure, with the heat conducting plate hidden, wherein a reinforcement member is shown;

[0073] Figure 5 This is a schematic diagram of the three-dimensional structure of a fin provided in one embodiment of the present disclosure;

[0074] Figure 6 is a structural schematic diagram of a fin provided in another embodiment of the present disclosure;

[0075] Figure 7 is a schematic top view of a battery tray provided in one embodiment of the present disclosure;

[0076] Figure 8 yes Figure 7 Schematic cross-sectional view along direction BB;

[0077] Figure 9 yes Figure 8 A partial enlarged schematic diagram of point C in the middle;

[0078] Figure 10 yes Figure 8 A partial enlarged schematic diagram of point C in the middle, wherein the reinforcement is not shown;

[0079] Figure 11 yes Figure 8 A local enlarged schematic diagram of point D in the middle.

[0080] Description of Reference Numerals

[0081] 1-reinforcement member; 101-peak portion; 1011-first plane; 102-trough portion; 1021-second plane; 103-first connecting portion; 104-second connecting portion; 2-battery tray; 20-cavity; 203-first wall; 204-second wall; 21-flow channel; 22-heat conducting plate; 221-first bottom plate; 222-first side plate; 223-first flange; 23-flow channel plate; 231-second bottom plate; 232-second side plate; 233-second flange; 3-battery tray assembly; 30-accommodating cavity; 41-first gap; 42-second gap; 51-first heat conducting portion; 52-second heat conducting portion; 61-first plate portion; 62-second plate portion; 71-first raised portion; 72-second raised portion; a-width of the first plane; b-width of the second plane; c-thickness of the corrugated member; L-wave pitch. DETAILED DESCRIPTION

[0082] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0083] In this disclosure, unless otherwise indicated, directional terms such as "upper," "lower," "top," and "bottom" are generally defined relative to the drawing orientation of the corresponding drawings. These terms are intended solely to facilitate and simplify the description of this disclosure and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, structure, or operation. Therefore, they should not be construed as limitations on this disclosure. "Inside" and "outside" refer to the inside and outside of the corresponding component outlines. Furthermore, the terms "first," "second," and the like are used to distinguish one element from another and do not convey sequential or significant meanings.

[0084] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "disposed," "connected," "connected," and "installed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections, and may be directly connected or indirectly connected through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0085] like Figures 1 to 11 As shown, according to the first aspect of the present disclosure, a battery tray assembly 2 is provided, which includes a battery tray 2 and a reinforcement 1. A cavity 20 is provided at at least one end of the battery tray 2 along a first direction. The cavity 20 is located inside the battery tray 2. A reinforcement 1 is provided in the cavity 20. In the first direction, a first gap 41 is provided between one side of the cavity 20 away from the center of the battery tray 2 and the reinforcement 1 located in the cavity 20.

[0086] It should be noted that the cavity 20 may include a cavity located in the bottom plate and / or side beam of the battery tray 2, rather than the accommodating cavity 30 on the battery tray 2 suitable for accommodating battery cells.

[0087] In the present disclosure, the reinforcement 1 can be set in the cavity 20, and a first gap 41 is provided between the reinforcement 1 and the side of the cavity 20 away from the center of the battery tray 2. The reinforcement 1 can, to a certain extent, support the cavity 20, thereby improving the structural strength of the battery tray 2, and further improving the overall rigidity and strength of the battery pack. The reinforcement 1 and the first gap 41 can also be used to absorb energy and provide a buffer, so that when the battery tray 2 is impacted, the reinforcement 1 and the first gap 41 can absorb the impact on the battery tray 2, thereby improving the anti-collision capability of the battery tray and the battery pack, reducing damage to the cells contained in the battery tray 2, and thus improving the safety of the battery pack.

[0088] In addition, compared with a solid filling structure of the same volume, the reinforcement 1 has a lighter weight. A cavity 20 is set inside the battery tray 2, and the reinforcement 1 is arranged in the cavity 20, which has little impact on the weight of the battery tray 2 and is conducive to the lightweighting of the battery pack.

[0089] Here, the first direction can be any direction, for example, the width direction of the battery tray 2 or the length direction of the battery tray 2, and this disclosure is not limited thereto. Taking the case where the first direction is the width direction of the battery tray 2 as an example, since the first gap 41 is farther from the center of the battery tray 2 than the reinforcement 1 in the first direction, when the battery tray 2 is impacted in the width direction of the battery tray 2, the first gap 41 and the reinforcement 1 can sequentially absorb the impact.

[0090] It is understandable that the center of the battery tray 2 may be the geometric center of the battery tray 2 or a position similar to the geometric center of the battery tray 2. Taking a square battery tray 2 as an example, the center of the battery tray 2 may be the width center of the battery tray 2 in the first direction.

[0091] In the present disclosure, optionally, as Figure 8 As shown, the cavity 20 has a first wall 203 and a second wall 204 opposite to each other in the height direction of the battery tray 2 , the height direction being perpendicular to the first direction, and the reinforcement 1 being a corrugated member, and the reinforcement 1 contacts at least one of the first wall 203 and the second wall 204 .

[0092] The reinforcement 1 contacts at least one of the first wall 203 and the second wall 204 , and can support the cavity 20 , thereby improving the structural strength of the battery tray 2 , and further improving the overall rigidity and strength of the battery pack.

[0093] Furthermore, since the reinforcement member 1 constructed as a corrugated member has good buffering capacity, when the battery tray 2 is impacted, the damage to the battery cells carried by the battery tray 2 can be reduced, thereby improving the safety of the battery pack.

[0094] It can be understood that the height direction here is the direction perpendicular to the plane where the first direction is located, that is, the direction perpendicular to the length direction and width direction of the battery tray 2. In other words, the height direction of the battery tray 2 can be consistent with the depth direction of the accommodating cavity 30 of the battery tray 2.

[0095] The present disclosure does not limit the arrangement of the reinforcement 1. As an embodiment, Figure 9As shown, the first wall 203 is suitable for supporting the battery cell, that is, the first wall 203 is the top wall of the cavity 20. In other words, the reinforcement 1 can contact the top and bottom walls of the cavity 20. When the battery tray 2 is impacted from the bottom, the reinforcement 1 can provide good support for the cavity 20 and absorb the impact force, thereby improving the ability of the battery tray 2 to withstand impact from the bottom.

[0096] Here, the first wall 203 may be a first bottom plate 221 mentioned below, and the second wall 204 may be a second bottom plate 231 mentioned below.

[0097] It can be understood that the "top and bottom" here refer to the "top and bottom" of the battery pack under normal use. For example, when the battery pack is installed in a vehicle, the bottom of the battery tray 2 can be the part of the battery tray 2 close to the ground, that is, the bottom plate of the battery tray 2.

[0098] The reinforcement 1 may contact the first wall 203 and the second wall 204 at any suitable position, which is not limited in the present disclosure. As an embodiment, Figure 5 and Figure 6 As shown, the reinforcement 1 has a peak portion 101 and a trough portion 102 , the peak portion 101 may contact the first wall 203 , and / or the trough portion 102 may contact the second wall 204 , for example, the peak portion 101 may contact the top wall of the cavity 20 , and the trough portion 102 may contact the bottom wall of the cavity 20 .

[0099] As another embodiment, both ends of the reinforcement member 1 in the length or width direction may be in contact with the first wall 203 and the second wall 204 respectively.

[0100] As another embodiment, the reinforcement 1 may also be, but is not limited to, a foam member, or a structure having a honeycomb structure or pores, which has excellent strength and mechanical properties, can effectively buffer energy absorption and resist impact. The foam member may be a plastic foam member, such as PU (Polyurethane) or PP (polypropylene), or a metal foam member, such as foamed aluminum or foamed steel, which have excellent toughness and strength properties. It is understood that the reinforcement 1 may also be a combination of the above examples, such as filling the gaps within the corrugated member with foam members, etc., and this disclosure does not impose specific limitations.

[0101] In the present disclosure, as an embodiment, the crest portion 101 can be in surface contact with the first wall 203, and the trough portion 102 can be in surface contact with the second wall 204. Surface contact can ensure the reliability of the connection and increase the support surface of the reinforcement 1, so that the reinforcement 1 has a better support effect.

[0102] Alternatively, as Figure 5and Figure 6 As shown, the first wall 203 has a plane, the peak portion 101 has a first plane 1011, and the first plane 1011 is in surface contact with the plane of the first wall 203, and / or the second wall 204 has a plane, the trough portion 102 has a second plane 1021, and the second plane 1021 is in surface contact with the plane of the second wall 204.

[0103] In other embodiments of the present disclosure, the crest portion 101 and the first wall 203 may be in surface contact through a curved surface, and the trough portion 102 and the second wall 204 may also be in surface contact through a curved surface.

[0104] In addition, optionally, the width a of the first plane and the width b of the second plane may be equal, so that the first plane 1011 and the second plane 1021 can be used interchangeably, which is beneficial to improving the efficiency of arranging the reinforcement member 1 in the cavity 20 .

[0105] In this disclosure, as an embodiment, Figure 7 As shown, the first direction may be one of the width direction and the length direction of the battery tray 2 , and the second direction may be the other of the width direction and the length direction of the battery tray 2 , that is, the second direction may be perpendicular to the first direction.

[0106] Therefore, when the reinforcement member 1 is disposed in the cavity 20 , the width a of the first plane and the width b of the second plane may both be the widths of the first plane 1011 and the second plane 1021 along the second direction.

[0107] As another embodiment of the present disclosure, the second direction may be inclined relative to the first direction, that is, the reinforcement 1 may be arranged obliquely.

[0108] In addition, in the embodiment in which the reinforcement 1 is brazed to the first wall 203 and the second wall 204, the width of the first plane 1011 and the width of the second plane 1021, and the welding time required for the two welding surfaces (i.e., the first plane 1011 and the second plane 1021) during the overall brazing operation are equal, which is beneficial for ensuring that the first plane 1011 and the first wall 203, and the second plane 1021 and the second wall 204 have good connection strength after brazing.

[0109] The present disclosure does not limit the specific widths of the first plane 1011 and the second plane 1021. As an embodiment of the present disclosure, the width a of the first plane (e.g. Figure 6 The left and right directions of the middle figure) can be 1.2mm to 5mm, and / or the width b of the second plane (such as Figure 6The width a of the first plane and the width b of the second plane are within the above ranges, so that the reinforcement member 1 has an appropriate number of peaks 101 and troughs 102 within the limited space of the cavity 20. Furthermore, the peaks 101 and the first wall 203 have sufficient surface contact area, and the troughs 102 and the second wall 204 have sufficient surface contact area.

[0110] Furthermore, in the present disclosure, the width of the crest portion 101, the width of the trough portion 102, and the pitch L can have any appropriate ratio relationship. As one embodiment of the present disclosure, the width of the crest portion 101 is equal to the width of the trough portion 102, and the pitch L of the reinforcement member 1 is no greater than three times the width of the crest portion 101. This arrangement ensures that the reinforcement member 1 has sufficient supporting strength, so that the reinforcement member 1 can provide good support for the first wall 203 and the second wall 204. Here, the width of the crest portion 101 can be equal to the width of the first plane 1011, and the width of the trough portion 102 can be equal to the width of the second plane 1021.

[0111] Alternatively, as Figure 5 and Figure 6 As shown, the reinforcement 1 further has a first connecting portion 103 and a second connecting portion 104, and the number of the crest portions 101 and the trough portions 102 are both multiple, one end of the first connecting portion 103 is connected to one of the two adjacent trough portions 102, and the other end of the first connecting portion 103 is connected to a first side of the crest portion 101 located between the two adjacent trough portions 102, one end of the second connecting portion 104 is connected to a second side of the crest portion 101 located between the two adjacent trough portions 102, and the other end of the second connecting portion 104 is connected to the other of the two adjacent trough portions 102, wherein the first side and the second side are both sides in the width direction of the crest portion 101.

[0112] It can be understood that the width direction of the peak portion 101 is the spacing direction between the plurality of peak portions 101, that is, Figure 6 In the left and right directions of the middle figure, the width direction of the trough portion 102 is the spacing direction between the plurality of trough portions 102, that is, Figure 6 For example, when the reinforcement member 1 is disposed in the cavity 20 , the width of the crest portion 101 may be the width of the crest portion 101 along the second direction.

[0113] The first connecting portion 103 and the second connecting portion 104 can be arranged at any appropriate angle with the crest portion 101 and the trough portion 102, and the present disclosure does not limit this. As an embodiment, Figure 6 As shown, the first connecting portion 103 and the crest portion 101 connected thereto are arranged vertically, and the first connecting portion 103 and the trough portion 102 connected thereto are arranged vertically, and / or,

[0114] The second connecting portion 104 forms an obtuse angle with the crest portion 101 connected thereto, and the second connecting portion 104 also forms an obtuse angle with the trough portion 102 connected thereto. This arrangement not only allows the reinforcement member 1 to provide good support for the first wall 203 and the second wall 204, but also disperses the force transmitted from the reinforcement member 1 to the first wall 203 and the second wall 204.

[0115] As another embodiment, the first connecting portion 103 is perpendicular to the crest portion 101 and the trough portion 102 connected thereto, and the second connecting portion 104 is perpendicular to the crest portion 101 and the trough portion 102 connected thereto.

[0116] As another embodiment, Figure 5 As shown, the first connection portion 103 is arranged at an obtuse angle with the crest portion 101 and the corresponding trough portion 102 , and the second connection portion 104 is arranged at an obtuse angle with the crest portion 101 and the corresponding trough portion 102 .

[0117] Alternatively, as Figure 5 As shown, the orthographic projection of the crest portion 101 on a plane perpendicular to the height direction may be wavy, and / or the orthographic projection of the trough portion 102 on a plane perpendicular to the height direction may be wavy. That is, each crest portion 101 is wavy in its own length direction, and / or each trough portion 102 is wavy in its own length direction (e.g., Figure 6 The wave-like shape of the crest portion 101 can increase the contact area between the reinforcement 1 and the first wall 203, thereby dispersing the force transmitted from the reinforcement 1 to the first wall 203. Similarly, the wave-like shape of the trough portion 102 can increase the contact area between the reinforcement 1 and the second wall 204, thereby dispersing the force transmitted from the reinforcement 1 to the second wall 204.

[0118] In addition, the wave crest portion 101 and the wave trough portion 102 are wavy, which can also make the reinforcement member 1 have higher rigidity and strength when bearing the force from the second wall 204 to the first wall 203, and can absorb more impact force during the collapse process.

[0119] Here, it can be understood that the length direction of the peak portion 101 is perpendicular to the width direction of the peak portion 101, that is, Figure 6 In the direction perpendicular to the drawing, the length direction of the trough portion 102 is perpendicular to the width direction of the trough portion 102, that is, Figure 6 The direction perpendicular to the drawing surface.

[0120] In one embodiment provided by the present disclosure, Figure 5As shown, the projections of the first connecting portion 103 and the second connecting portion 104 on a plane perpendicular to the height direction may also be wavy, thereby further improving the buffering capacity and impact resistance of the reinforcement 1 .

[0121] The number of the crest portion 101 and the trough portion 102 of the reinforcement member 1 can be any appropriate number, which is not limited in the present disclosure. Optionally, as Figure 5 and Figure 6 As shown, in one embodiment of the present disclosure, the number of peak portions 101 and trough portions 102 are both multiple, and the multiple peak portions 101 and the multiple trough portions 102 are staggered in sequence along the second direction, which intersects the first direction. This arrangement can make the reinforcement 1 have good strength and rigidity.

[0122] In other embodiments of the present disclosure, the plurality of crest portions 101 and the plurality of trough portions 102 may also be alternately arranged in sequence along the first direction, which is not limited in the present disclosure.

[0123] The reinforcement member 1 may be made of any suitable material, which is not limited in this disclosure. Optionally, the reinforcement member 1 may be made of an aluminum alloy. Aluminum alloys have a certain degree of rigidity and strength and can absorb excessive impact forces through deformation. Furthermore, aluminum alloys are lightweight. In other words, reinforcement members 1 made of aluminum alloys can have excellent performance.

[0124] In other embodiments of the present disclosure, optionally, the material of the reinforcement 1 may also include stainless steel.

[0125] In the present disclosure, the reinforcement 1 may include a reinforcement body and a cladding layer, wherein the cladding layer is coated on the outer surface of the reinforcement body, and the reinforcement body may be made of a 3-series aluminum alloy. The 3-series aluminum alloy material of the reinforcement body can provide the reinforcement 1 with sufficient rigidity and strength while being relatively light.

[0126] In addition, in the embodiment where the reinforcement 1 is connected to the first wall 203 and the second wall 204 by brazing, the coating layer can serve as a brazing agent between the reinforcement body and the first wall 203 and the second wall 204 .

[0127] Here, optionally, the covering layer may be covered on the reinforcement body by press rolling.

[0128] Optionally, the cladding layer may be made of a 4-series aluminum alloy. Since the melting point of the 4-series aluminum alloy is close to but lower than that of the 3-series aluminum alloy, the 4-series aluminum alloy has good performance as a brazing flux for the 3-series aluminum alloy, thereby ensuring good connection strength between the reinforcement body and the first wall 203 and the second wall 204 after brazing.

[0129] The reinforcement 1 can be of any suitable thickness, which is not limited in the present disclosure. As an embodiment, the thickness c of the reinforcement can be 0.2 mm to 1 mm, so that the reinforcement 1 has sufficient strength and rigidity while also having a relatively light weight.

[0130] The present disclosure does not limit the thickness of the coating layer. As an embodiment, the thickness of the coating layer can be 10% to 18% of the thickness of the reinforcement 1, so that the reinforcement body and the first wall 203 and the second wall 204 have sufficient connection strength after brazing.

[0131] Here, the thickness of the coating layer refers to the thickness of the coating layer located on one side of the reinforcement body (i.e., the thickness of a single coating layer), and the thickness c of the reinforcement is the sum of the thickness of the reinforcement body and the coating layers located on both sides of the reinforcement body.

[0132] As one embodiment of the present disclosure, the wave pitch L of the reinforcement member 1 can be 5 mm, the width of the first plane 1011 and the width of the second plane 1021 can both be 1.3 mm, and the thickness of the reinforcement member 1 can be 0.2 mm. The thickness of the reinforcement body can be 0.1 mm, and the material of the reinforcement body can be 3003 aluminum alloy. The thickness of the cladding layer can be 0.05 mm, and the material of the cladding layer can be 4045 aluminum alloy. This structure of the reinforcement member 1 can have good rigidity and strength while being light weight, and can also form a sufficient contact area between the first wall 203 and the second wall 204. This reinforcement member 1 has a particularly good support effect on the cavity 20 where the spacing between the first wall 203 and the second wall 204 is 9 mm.

[0133] In the present disclosure, as an embodiment, the reinforcement 1 can be welded to the first wall 203, and / or, the reinforcement 1 can be welded to the second wall 204. The welding reliability is high, which can prevent the reinforcement 1 from sliding in the cavity, causing abnormal noise and wear of the cavity 20 wall.

[0134] The present disclosure does not limit the welding method between the reinforcement 1, the first wall 203, and the second wall 204. As another embodiment of the present disclosure, the reinforcement 1 can be brazed to the first wall 203, and / or the reinforcement 1 can be brazed to the second wall 204. The brazing connection between the reinforcement 1 and the first wall 203 and the second wall 204 can ensure good connection strength between the reinforcement 1 and the first wall 203 and the second wall 204, and can minimize deformation of the first wall 203 and the second wall 204, that is, minimize the impact on the flatness of the battery tray 2.

[0135] As another embodiment, the reinforcement member 1 may also be connected to the first wall 203 and the second wall 204 by structural adhesive.

[0136] In order to improve the impact resistance of the battery tray 2, as an implementation method, Figure 4 As shown, a cavity 20 is provided at at least one end of the battery tray 2 in the second direction, and a reinforcement member 1 is provided in the cavity 20. The second direction is perpendicular to the first direction. By providing the reinforcement member 1 in the cavity 20, the battery tray 2 can be improved in its ability to withstand impacts from the second direction.

[0137] It is understandable that in an embodiment where cavities 20 are provided at both ends of the battery tray 2 in the second direction, reinforcement members 1 may be provided in both cavities 20 of the battery tray 2 in the second direction.

[0138] In this disclosure, see Figure 4 The multiple cavities 20 located in the first direction and the second direction can form an enclosed annular area or an annular area with a gap, and the impact resistance of the battery tray 2 is improved by setting the first gap 41 and the reinforcement 1 in the cavity 20.

[0139] Here, the cavity 20 at one end of the battery tray 2 in the first direction and the cavity 20 at one end in the second direction can be connected, and multiple reinforcements 1 located in different cavities 20 can be connected to each other as one, thereby improving the efficiency of installing the reinforcement 1 in the cavity 20.

[0140] Of course, the cavity 20 at one end of the battery tray 2 in the first direction and the cavity 20 at one end in the second direction may not be connected, and the multiple reinforcements 1 located in different cavities 20 may not be connected to each other, which can reduce the processing cost of the reinforcements 1.

[0141] In an embodiment where a flow channel 21 is provided between the flow channel plate 23 and the heat conducting plate 22, the reinforcement 1 can be arranged around the flow channel 21. On the one hand, the flow channel 21 can be brought close to the middle of the heat conducting plate 22, which is conducive to better heat exchange between the flow channel 21 and the battery cell. On the other hand, the reinforcement 1 can protect the surrounding side of the flow channel 21.

[0142] In order to improve the ability of the battery tray 2 to resist lateral impact, as an implementation method, Figure 9 As shown, in the first direction, a second gap 42 is defined between one side of the cavity 20 near the center of the battery tray 2 and the reinforcement member 1 located within the cavity 20. In other words, when the battery tray 2 is impacted, the impact on the battery tray 2 can be effectively absorbed by the cushioning effect of the first gap 41, the reinforcement member 1, and the second gap 42.

[0143] As another embodiment, the reinforcement 1 can be first pressed into a shape that matches the cavity 20 through a mold, and then the reinforcement 1 can be arranged in the cavity 20 so that the reinforcement 1 fully fills the cavity 20, thereby improving the battery tray 2's ability to resist lateral impact.

[0144] Optionally, the first gap 41 may be larger than the second gap 42 , so that the reinforcement 1 may be closer to the center of the battery tray 2 in the cavity 20 , which is beneficial for improving the supporting effect of the reinforcement 1 on the cavity 20 .

[0145] In the present disclosure, a flow channel 21 may optionally be provided within the battery tray 2. Along the first direction, the flow channel 21 is located on one side of the cavity 20. A heat exchange medium may be introduced into the flow channel 21 to cool or heat the battery cells contained within the battery tray 2. Because the flow channel 21 is located on one side of the cavity 20, the reinforcement 1 and the gaps (such as the first gaps 41) within the cavity 20 can protect the flow channel 21 when the battery tray 2 is impacted from the first direction.

[0146] Here, optionally, the cavity 20 may be in communication with the flow channel 21 , that is, the heat exchange medium may also flow into the cavity 20 .

[0147] As an implementation method, Figure 4 As shown, in the first direction, cavities 20 are provided on both sides of the battery tray 2 , and the flow channel 21 is located between the two cavities 20 , so that both sides of the flow channel 21 can be protected by the reinforcement 1 and the first gap 41 .

[0148] In order to facilitate the positioning of the reinforcement 1 and increase the layout space, as an embodiment, Figure 9 and Figure 10 As shown, the battery tray 2 has a receiving cavity 30 for receiving battery cells. On a plane perpendicular to the first direction, the orthographic projection of the bottom wall of the flow channel 21 away from the receiving cavity 30 is located between the orthographic projection of the bottom wall of the cavity 20 away from the receiving cavity 30 and the orthographic projection of the bottom wall of the receiving cavity 30. In other words, in the height direction of the battery tray 2, the bottom wall of the flow channel 21 away from the receiving cavity 30 is located between the bottom wall of the cavity 20 away from the receiving cavity 30 and the bottom wall of the receiving cavity 30, so that the height of the second wall 204 in the area corresponding to the cavity 20 is lower than the height of the bottom wall of the flow channel 21, thereby facilitating positioning, that is, facilitating the arrangement of the reinforcement 1 at the cavity 20. At the same time, it can be beneficial to increase the arrangement space of the reinforcement 1.

[0149] In one embodiment of the present disclosure, Figure 2-Figure 4 、 Figures 8-10As shown, the battery tray 2 may include a connected heat conducting plate 22 and a flow channel plate 23. The heat conducting plate 22 includes a first heat conducting portion 51 and a second heat conducting portion 52 arranged and connected along a first direction. The flow channel plate 23 includes a first plate portion 61 and a second plate portion 62 arranged and connected along the first direction. A flow channel 21 is defined between the first heat conducting portion 51 and the first plate portion 61, and a cavity 20 is defined between the second heat conducting portion 52 and the second plate portion 62. The heat conducting plate 22 can be used to support battery cells. Since the flow channel 21 is provided between the first heat conducting portion 51 and the first plate portion 61, the flow channel 21 can exchange heat with the battery cells through the heat conducting plate 22.

[0150] It is understood that in an embodiment where the battery tray 2 has cavities 20 at both ends along the first direction, the heat conducting plate 22 may include two second heat conducting portions 52 connected to the first heat conducting portion 51, and correspondingly, the flow channel plate 23 may include two second plate portions 62 connected to the first plate portion 61. That is, the two second heat conducting portions 52 are disposed on opposite sides of the first heat conducting portion 51 in the first direction, and the two second plate portions 62 are disposed on opposite sides of the first plate portion 61 in the first direction.

[0151] In order to ensure that the heat conducting plate 22 has good strength, optionally, the first heat conducting portion 51 and the second heat conducting portion 52 may be integrally formed.

[0152] In order to ensure that the flow channel plate 23 has good strength, optionally, the first plate portion 61 and the second plate portion 62 are integrally formed.

[0153] It is understandable that in other embodiments of the present disclosure, the first heat conducting portion 51 and the second heat conducting portion 52 can be designed separately, that is, they can be processed separately. The first plate portion 61 and the second plate portion 62 can also be designed separately, that is, they can be processed separately. In this case, the flow channel 21 between the first heat conducting portion 51 and the first plate portion 61 can be designed separately, and the cavity 20 between the second heat conducting portion 52 and the second plate portion 62 can be designed separately. In this way, it is convenient to design the flow channel 21 and the cavity 20 in a targeted manner according to the heat exchange requirements and the layout requirements of the reinforcement 1, thereby facilitating the heat exchange of the battery pack and the layout of the reinforcement 1.

[0154] The present disclosure does not limit whether the flow channel 21 and the cavity 20 are connected. As an embodiment, Figure 4 As shown, the flow channel 21 and the cavity 20 may not be connected, so that the first gap has a better buffering capacity.

[0155] As another embodiment of the present disclosure, the cavity 20 and the flow channel 21 may also be in communication, that is, the heat exchange medium may also flow into the cavity 20 .

[0156] As an implementation method, Figure 9As shown, the first plate portion 61 is provided with a first protrusion 71 facing the first heat conducting portion 51. The first protrusion 71 is connected to the first heat conducting portion 51 to separate the flow channel 21 and the cavity 20. The provision of the first protrusion 71 can prevent the heat exchange medium in the flow channel 21 from entering the cavity 20, making it easier to design the flow channel 21 and control the flow path of the heat exchange medium, thereby achieving a better heat exchange effect.

[0157] In order to improve the heat exchange effect between the heat exchange medium in the flow channel 21 and the heat conducting plate 22, as an embodiment, Figure 11 As shown, the first plate portion 61 is provided with a plurality of spaced second protrusions 72 facing the first heat conducting portion 51. The plurality of second protrusions 72 are connected to the first heat conducting portion 51 to define the flow channel 21. Because the flow channel 21 is defined by the second protrusions 72 and the first heat conducting portion 51, the heat exchange medium in the flow channel 21 can directly contact the first heat conducting portion 51, thereby facilitating improved heat exchange between the heat exchange medium in the flow channel 21 and the heat conducting plate 22.

[0158] Here, optionally, the structures of the first protrusion 71 and the second protrusion 72 may be the same or different, and this disclosure does not limit this.

[0159] In this disclosure, as an embodiment, Figure 9 and Figure 10 As shown, the second heat conducting portion 52 may include a first bottom plate 221, a first side plate 222 and a first flange 223 arranged and connected along the first direction, the first side plate 222 is connected to the end of the first bottom plate 221 away from the first heat conducting portion 51, the first flange 223 is connected to the end of the first side plate 222 away from the first bottom plate 221, the first heat conducting portion 51, the first bottom plate 221 and the first side plate 222 enclose an accommodating cavity 30, the accommodating cavity 30 is suitable for accommodating the battery cell, the second plate portion 62 includes a first bottom plate 221, a first side plate 222 and a first flange 223 arranged along the first direction. The second bottom plate 231, the second side plate 232 and the second flange 233 are connected, the second side plate 232 is connected to the end of the second bottom plate 231 away from the first plate portion 61, the second flange 233 is connected to the end of the second side plate 232 away from the second bottom plate 231, and a cavity 20 is defined between the first bottom plate 221, the second bottom plate 231, the first side plate 222, the second side plate 232 and the first protrusion 71, and the first flange 223 is connected to the second flange 233 (such as a stacked arrangement) to close the cavity 20.

[0160] The first heat conducting portion 51, the first bottom plate 221, the first plate portion 61, and the second bottom plate 231 collectively define the bottom plate of the battery tray 2. The first side plates 222 and the second side plates 232 collectively define the side beams of the battery tray 2. The first flanges 223 and the second flanges 233 collectively define the flanges of the battery tray 2. In this way, a boat-shaped battery tray can be constructed without the need for separate processing of the side beams and flanges.

[0161] It is understandable that the flanges (the first flange 223 and the second flange 233 ) of the battery tray 2 can be used to connect with the upper cover of the battery tray 2 .

[0162] Optionally, the first bottom plate 221, the first side plate 222, and the first flange 223 are integrally formed, and / or the second bottom plate 231, the second side plate 232, and the second flange 233 are integrally formed. This arrangement ensures that the heat conducting plate 22 and / or the flow channel plate 23 have good integrity, which helps improve the assembly efficiency of the battery tray 2.

[0163] In order to make the heat conducting plate 22 and the flow channel plate 23 have higher strength, optionally, the material of the heat conducting plate 22 and the flow channel plate 23 can include 6 series aluminum alloy.

[0164] Optionally, the surfaces of the heat conducting plate 22 and the flow channel plate 23 can be coated with 3 series aluminum alloy to facilitate the brazing connection between the heat conducting plate 22 and the flow channel plate 23, and the brazing connection between the reinforcement 1 and the heat conducting plate 22 and the flow channel plate 23.

[0165] Alternatively, as Figure 10 As shown, the first bottom plate 221 and the first side plate 222 are connected in an arc shape, and / or the first side plate 222 and the first flange 223 are connected in an arc shape, and / or the second bottom plate 231 and the second side plate 232 are connected in an arc shape, and / or the second side plate 232 and the second flange 233 are connected in an arc shape. The arc shape connection is beneficial for reducing stress concentration between the first bottom plate 221 and the first side plate 222, between the first side plate 222 and the first flange 223, between the second bottom plate 231 and the second side plate 232, and between the second side plate 232 and the second flange 233.

[0166] It can be understood that when the number of the second heat-conducting parts 52 and the second plate parts 62 is the two mentioned above, each second heat-conducting part 52 can include a first bottom plate 221, a first side plate 222 and a first flange 223, and each second plate part 62 can include a second bottom plate 231, a second side plate 232 and a second flange 233.

[0167] According to a second aspect of the present disclosure, a battery pack is provided, including a battery cell and the above-mentioned battery tray assembly 3 , wherein the battery tray 2 is provided with a receiving cavity 30 , and the battery cell is disposed in the receiving cavity 30 .

[0168] According to a third aspect of the present disclosure, there is provided an electrical device comprising the above-mentioned battery pack.

[0169] Here, electrical equipment may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include aircraft, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc., and this disclosure does not limit this.

[0170] Optionally, when the electric device is a vehicle, the battery pack can be installed on the body of the vehicle.

[0171] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0172] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0173] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A battery tray assembly, characterized in that: It comprises a battery tray and a reinforcement, wherein at least one end of the battery tray along a first direction is provided with a cavity, the cavity is located inside the battery tray, and the reinforcement is provided in the cavity; In the first direction, a first gap is provided between a side of the cavity away from the center of the battery tray and the reinforcement member located in the cavity.

2. The battery tray assembly according to claim 1, characterized in that: The cavity has a first wall and a second wall opposite to each other in a height direction of the battery tray, wherein the height direction is perpendicular to the first direction; The reinforcement member is a corrugated member, and the reinforcement member contacts at least one of the first wall and the second wall.

3. The battery tray assembly according to claim 2, characterized in that: The reinforcement member has a crest portion and a trough portion; The peak portion contacts the first wall, and / or the trough portion contacts the second wall.

4. The battery tray assembly according to claim 3, characterized in that: The crest portion is in contact with the first wall surface; and / or, The trough portion is in contact with the second wall surface.

5. The battery tray assembly according to claim 4, characterized in that: The first wall has a plane, the peak portion has a first plane, and the first plane is in surface contact with the plane of the first wall; and / or, The second wall has a plane, the trough portion has a second plane, and the second plane is in surface contact with the plane of the second wall.

6. The battery tray assembly according to claim 5, characterized in that: The width of the first plane is equal to the width of the second plane.

7. The battery tray assembly according to claim 5, characterized in that: The width of the first plane is 1.2 mm to 5 mm; and / or, The width of the second plane is 1.2 mm to 5 mm.

8. The battery tray assembly according to claim 3, characterized in that: The width of the wave crest portion is equal to the width of the wave trough portion, and the wave pitch of the reinforcement member is not greater than three times the width of the wave crest portion.

9. The battery tray assembly according to claim 3, characterized in that: The reinforcement member further comprises a first connecting portion and a second connecting portion, and the number of the crest portion and the number of the trough portion are both multiple; One end of the first connection portion is connected to one of the two adjacent trough portions, and the other end of the first connection portion is connected to a first side of the crest portion located between the two adjacent trough portions; One end of the second connection portion is connected to the second side of the crest portion located between the two adjacent trough portions, and the other end of the second connection portion is connected to the other of the two adjacent trough portions; The first side and the second side are two sides of the crest portion in a width direction.

10. The battery tray assembly according to claim 9, characterized in that: The first connecting portion and the crest portion connected thereto are arranged vertically, and the first connecting portion and the trough portion connected thereto are arranged vertically; and / or, The second connection portion and the crest portion connected thereto are arranged at an obtuse angle, and the second connection portion and the trough portion connected thereto are both arranged at an obtuse angle.

11. The battery tray assembly according to claim 3, characterized in that: The orthographic projection of the crest portion on a plane perpendicular to the height direction is wavy; and / or, The orthographic projection of the trough portion on a plane perpendicular to the height direction is wavy.

12. The battery tray assembly according to any one of claims 3 to 11, characterized in that: The number of the crest parts and the number of the trough parts are both multiple; The plurality of crest portions and the plurality of trough portions are alternately arranged in sequence along a second direction, and the second direction intersects with the first direction.

13. The battery tray assembly according to claim 12, characterized in that: The first direction is one of a width direction and a length direction of the battery tray, and the second direction is the other of the width direction and the length direction of the battery tray.

14. The battery tray assembly according to any one of claims 1 to 11, characterized in that: The material of the reinforcement member includes aluminum alloy.

15. The battery tray assembly according to claim 14, characterized in that: The reinforcement member includes a reinforcement member body and a coating layer, wherein the coating layer is coated on the outer surface of the reinforcement member body, and the material of the reinforcement member body includes 3 series aluminum alloy.

16. The battery tray assembly according to claim 15, characterized in that: The material of the coating layer includes 4 series aluminum alloy.

17. The battery tray assembly according to claim 15, characterized in that: The thickness of the reinforcement is 0.2 mm to 1 mm.

18. The battery tray assembly according to claim 15, characterized in that: The thickness of the coating layer is 10% to 18% of the thickness of the reinforcement.

19. The battery tray assembly according to any one of claims 2 to 11, characterized in that: The reinforcement is connected to the first wall by welding, and / or the reinforcement is connected to the second wall by welding.

20. The battery tray assembly according to any one of claims 2 to 11, characterized in that: The reinforcement is connected to the first wall by brazing, and / or the reinforcement is connected to the second wall by brazing.

21. The battery tray assembly according to any one of claims 1 to 11, characterized in that: At least one end of the battery tray in the second direction is provided with the cavity, and the reinforcement is arranged in the cavity; The second direction is perpendicular to the first direction.

22. The battery tray assembly according to any one of claims 1 to 11, characterized in that: In the first direction, a second gap is provided between one side of the cavity close to the center of the battery tray and the reinforcement member located in the cavity.

23. The battery tray assembly according to claim 22, characterized in that: The first gap is larger than the second gap.

24. The battery tray assembly according to any one of claims 1-11, characterized in that: A flow channel is also provided in the battery tray, and along the first direction, the flow channel is located at one side of the cavity.

25. The battery tray assembly according to claim 24, characterized in that: In the first direction, the cavities are disposed on both sides of the battery tray, and the flow channel is located between the two cavities.

26. The battery tray assembly according to claim 24, characterized in that: The battery tray has a receiving cavity for receiving the battery cell; On a plane perpendicular to the first direction, an orthographic projection of the flow channel away from the bottom wall of the accommodating cavity is located between an orthographic projection of the cavity away from the bottom wall of the accommodating cavity and an orthographic projection of the bottom wall of the accommodating cavity.

27. The battery tray assembly according to claim 24, characterized in that: The battery tray comprises a heat conducting plate and a flow channel plate connected to each other, the heat conducting plate comprises a first heat conducting portion and a second heat conducting portion arranged and connected along the first direction, and the flow channel plate comprises a first plate portion and a second plate portion arranged and connected along the first direction; The flow channel is defined between the first heat conducting portion and the first plate portion; The cavity is defined between the second heat conducting portion and the second plate portion.

28. The battery tray assembly according to claim 27, characterized in that: The first heat conducting portion and the second heat conducting portion are integrally formed; and / or, The first plate portion and the second plate portion are integrally formed.

29. The battery tray assembly according to claim 28, characterized in that: The flow channel and the cavity are not connected.

30. The battery tray assembly according to claim 29, characterized in that: The first plate portion is provided with a first protrusion toward the first heat conducting portion, and the first protrusion is connected to the first heat conducting portion to separate the flow channel and the cavity.

31. The battery tray assembly according to claim 30, characterized in that: The first plate portion is provided with a plurality of spaced second protrusions facing the first heat conducting portion, and the plurality of second protrusions are all connected to the first heat conducting portion to define the flow channel.

32. The battery tray assembly according to claim 31, characterized in that: The second heat conducting portion comprises a first bottom plate, a first side plate and a first flange arranged and connected along the first direction, the first side plate is connected to an end of the first bottom plate away from the first heat conducting portion, and the first flange is connected to an end of the first side plate away from the first bottom plate; The first heat conducting portion, the first bottom plate and the first side plate enclose a receiving cavity, and the receiving cavity is suitable for receiving a battery cell; The second plate portion includes a second bottom plate, a second side plate and a second flange arranged and connected along the first direction, the second side plate is connected to an end of the second bottom plate away from the first plate portion, and the second flange is connected to an end of the second side plate away from the second bottom plate; The cavity is defined between the first bottom plate, the second bottom plate, the first side plate, the second side plate and the first protruding portion; The first flange is connected to the second flange to close the cavity.

33. The battery tray assembly according to claim 32, characterized in that: The first bottom plate, the first side plate and the first flange are integrally formed; and / or, The second bottom plate, the second side plate and the second flange are integrally formed.

34. The battery tray assembly according to claim 32, characterized in that: The first bottom plate and the first side plate are connected by an arc, and / or The first side plate is connected to the first flange by an arc, and / or The second bottom plate and the second side plate are connected by an arc, and / or The second side plate is connected to the second flange by an arc.

35. A battery pack, characterized in that: comprising a battery cell and a battery tray assembly according to any one of claims 1 to 34, wherein the battery tray is provided with a receiving cavity; The battery core is arranged in the accommodating cavity.

36. An electrical equipment, characterized in that: Includes the battery pack as described in claim 35.

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