Battery tray, battery pack and vehicle

Abstract

The invention discloses a battery tray, a battery pack and a vehicle. The battery tray comprises a tray body and a plurality of heating assemblies. A containing cavity is formed in the tray body. The heating assemblies are arranged in the containing cavity, the heating assemblies are spaced in the first direction so as to divide the containing cavity into a plurality of battery cell mounting cavities, each battery cell mounting cavity is suitable for containing a battery cell, and each heating assembly extends in the second direction. Wherein the heating assembly comprises a heat conducting plate, a heating piece and a plurality of elastic pieces, the heating piece and the plurality of elastic pieces are respectively arranged on two sides of the heat conducting plate in the first direction, and one side, far away from the elastic pieces, of the heating piece is suitable for abutting against the battery cell. According to the battery tray, the battery cell is heated, meanwhile, the structural design of the heating assembly is more ingenious, self-clamping of the battery cell can be achieved with few parts, the heating piece and the battery cell are tightly attached, thermal resistance between the battery cell and the heating piece is reduced, and heating operation of the heating piece on the battery cell is facilitated.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery tray, a battery pack and a vehicle. Background Art

[0002] In power battery packs, heating films are often used in battery cell heating modules. A certain thickness of thermal conductive adhesive is often applied between the battery cell and the heating film to reduce the thermal resistance caused by the loose fit between the heating film and the battery cell. However, when the battery cells need to be frequently stored and retrieved in the tray device, thermal conductive adhesive cannot be applied between the battery cell and the heating film. In related technologies, mechanical clamping is often used to make the battery cell and the heating film fit tightly. However, the structure of mechanical clamping is relatively complex and often requires manual operation. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a battery tray that can heat the battery cell while the structural design of the heating component is more ingenious, and the battery cell can be self-clamped with fewer parts, thereby reducing the thermal resistance between the battery cell and the heating element, which is beneficial to the heating operation of the heating element on the battery cell.

[0004] Another object of the present invention is to provide a battery pack.

[0005] Another object of the present invention is to provide a vehicle.

[0006] A battery tray according to an embodiment of the first aspect of the present invention comprises: a tray body, the tray body being formed with a accommodating cavity, the tray body having a first direction, a second direction and a third direction orthogonal to each other; a plurality of heating components, the plurality of heating components being arranged in the accommodating cavity, the plurality of heating components being spaced apart along the first direction to divide the accommodating cavity into a plurality of battery cell mounting cavities, each of the battery cell mounting cavities being suitable for placing a battery cell, and each of the heating components extending along the second direction; wherein the heating component comprises a heat conducting plate, a heating element and a plurality of elastic elements, the heating element and the plurality of elastic elements being respectively arranged on both sides of the heat conducting plate in the first direction, and the side of the heating element away from the elastic element being suitable for abutting against the battery cell.

[0007] According to the battery tray of the embodiment of the present invention, a plurality of heating components are arranged in the accommodating cavity, so that the heating of the battery cell is achieved. At the same time, the elastic force of the elastic member of the heating component helps the heating member to stop against the surface of the battery cell on the side away from the heat conducting plate. Compared with the mechanical clamping structure, the structural design of the above-mentioned heating component is more ingenious, and the self-clamping of the battery cell can be achieved with fewer parts, so that the heating member and the battery cell are in close contact, reducing the thermal resistance between the battery cell and the heating member, which is beneficial to the heating operation of the heating member on the battery cell.

[0008] According to some embodiments of the present invention, the plurality of elastic members are arranged in an array, and the distance between the central axes of two adjacent elastic members is L1, wherein L1 satisfies: 80 mm ≤ L1 ≤ 120 mm.

[0009] According to some embodiments of the present invention, the outer diameter of each of the elastic members is D, wherein D satisfies: 30mm≤D≤50mm; and / or the length of each of the elastic members when uncompressed is L2, wherein L2 satisfies: L2≤20mm; and / or the compression stroke of each of the elastic members is L3, wherein L3 satisfies: L3≤5mm.

[0010] According to some embodiments of the present invention, the elastic member is a memory spring, and a wire diameter of each of the elastic members is d, wherein d satisfies: 1mm≤d≤3mm.

[0011] According to some embodiments of the present invention, the battery tray further comprises a plurality of partitions, each of the partitions is disposed between two adjacent heating assemblies, and both side surfaces of each partition in the first direction abut against the elastic member.

[0012] According to some embodiments of the present invention, the heating element includes a heating core and two insulating layers, and the two insulating layers are respectively arranged on both sides of the heating core in the first direction; the power of the heating core gradually decreases along the direction from the center of the insulating layer to the edge of the insulating layer.

[0013] According to some embodiments of the present invention, the heating core comprises a first heating wire; the first heating wire extends in a spiral shape along a direction from the center of the insulating layer to the edge of the insulating layer.

[0014] According to some embodiments of the present invention, the heating core includes a second heating wire, the second heating wire includes a plurality of parallel segments and a plurality of U-shaped segments, the plurality of parallel segments are arranged at intervals along the third direction, and each of the parallel segments extends along the second direction, and two adjacent parallel segments are connected by the U-shaped segment; along the direction from the center of the insulating layer to the edge of the insulating layer, the distance between two adjacent parallel segments in the third direction gradually increases.

[0015] According to some embodiments of the present invention, a width of each of the parallel segments in the third direction is smaller than a width of each of the U-shaped segments.

[0016] According to some embodiments of the present invention, the heating core includes at least one of a brass part, a stainless steel part, a white copper part, a PTC carbon-based polymer part and a PTC ceramic part; and / or the insulating layer includes at least one of a polyimide part, a polyamide resin part, a polyethylene terephthalate part and a mica part.

[0017] According to some embodiments of the present invention, an inner wall of the tray body is provided with a heat-insulating layer, and the heat-insulating layer is suitable for abutting against the battery core.

[0018] According to some embodiments of the present invention, the thickness of the thermal insulation layer is H, wherein H satisfies: H≥5mm.

[0019] A battery pack according to an embodiment of a second aspect of the present invention comprises: a battery tray, which is the battery tray according to an embodiment of the first aspect of the present invention; and at least one battery cell, which is disposed in a battery cell accommodating cavity of the battery tray.

[0020] A vehicle according to an embodiment of a third aspect of the present invention comprises: a battery pack according to an embodiment of the second aspect of the present invention.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a partial schematic diagram of a battery pack according to an embodiment of the present invention; Figure 2 yes Figure 1 The enlarged view of the A part shown in the middle circle; Figure 3 yes Figure 1 An exploded view of the battery pack shown in; Figure 4 is a schematic diagram of a heating assembly and a partition of a battery tray according to an embodiment of the present invention; Figure 5 is a schematic diagram of a heating element of a battery tray according to an embodiment of the present invention; Figure 6 is a schematic diagram of a first heating wire of a battery tray according to an embodiment of the present invention; Figure 7 is a schematic diagram of a second heating wire of a battery tray according to an embodiment of the present invention; Figure 8 is a partial schematic diagram of a battery pack according to another embodiment of the present invention.

[0023] Reference numerals: 100: battery tray; 1: tray body; 11: receiving cavity; 111: battery cell installation cavity; 2: heating assembly; 21: heat conducting plate; 22: heating element; 221: heating core; 2211: first heating wire; 2212: second heating wire; 22121: parallel section; 22122: U-shaped section; 222: insulation layer; 223: adhesive layer; 23: elastic element; 3: partition; 4: insulation layer; 5: battery cell bracket; 200: battery pack; 201: battery cell. DETAILED DESCRIPTION

[0024] Reference below Figure 1-Figure 8 A battery tray 100 according to an embodiment of a first aspect of the present invention is described.

[0025] like Figure 1-Figure 8 As shown, a battery tray 100 according to an embodiment of the first aspect of the present invention comprises a tray body 1 and a plurality of heating components 2. In the description of the present invention, "plurality" means two or more.

[0026] Specifically, the tray body 1 is formed with a receiving cavity 11, and the tray body 1 has first directions orthogonal to each other (for example, Figure 1 ), the second direction (for example, Figure 1 anteroposterior direction) and a third direction (e.g. Figure 1 The plurality of heating components 2 are arranged in the accommodating cavity 11, and the plurality of heating components 2 are spaced apart along the first direction to divide the accommodating cavity 11 into a plurality of battery cell installation cavities 111, each battery cell installation cavity 111 is suitable for placing a battery cell 201, and each heating component 2 extends along the second direction. The heating component 2 includes a heat conducting plate 21, a heating element 22 and a plurality of elastic elements 23, and the heating element 22 and the plurality of elastic elements 23 are respectively arranged on both sides of the heat conducting plate 21 in the first direction, and the side of the heating element 22 away from the elastic element 23 is suitable for abutting against the battery cell 201.

[0027] For example, in Figure 1 and- Figure 3 In the example of FIG. 1 , the receiving cavity 11 of the tray body 1 is divided into a plurality of battery cell installation cavities 111 by a plurality of heating components 2, and at least one battery cell 201 is suitable for being installed in each battery cell installation cavity 111. Figure 1-Figure 3 As shown, two heating components 2 are provided on opposite sides of the tray body 1 along a first direction; Figure 8 As shown, a plurality of heating components 2 are sequentially arranged along a first direction in the tray body 1. Thus, the heating components 2 can be used to heat the battery cells 201, thereby facilitating the temperature of the battery cells 201 to be suitable for use, improving the functional stability of the battery cells 201, and extending the service life of the battery cells 201.

[0028] In the direction away from the battery cell 201, the heating element 22, the heat conducting plate 21 and the elastic element 23 are arranged in sequence. In actual use, when the battery cell 201 is not placed in the battery cell installation cavity 111, the elastic element 23 extends naturally. In this way, the elastic force of the elastic element 23 can be guaranteed, and the aging and elastic force attenuation of the elastic element 23 can be reduced. When the battery cell 201 is moved into the battery cell installation cavity 111 or the battery cell 201 in the battery cell installation cavity 111 is taken out, the elastic element 23 is compressed to increase the space of the battery cell installation cavity 111, which is conducive to the convenience of movement of the battery cell 201 in the battery cell installation cavity 111. After the battery cell 201 is placed in the battery cell installation cavity 111, the heating element 22 and the heat conducting plate 21 move toward the battery cell 201 under the force of the elastic element 23 restoring the deformation until the heating element 22 stops against the surface of the battery cell 201. Therefore, the heating assembly 2 is used to self-clamp the battery cell 201 , so that the heating element 22 and the battery cell 201 are in close contact, which reduces the thermal resistance between the battery cell 201 and the heating element 22 , and is beneficial to the heating operation of the heating element 22 on the battery cell 201 .

[0029] Optionally, the size of the cell installation cavity 111 is slightly larger than the size of the cell 201, and the cell installation cavity 111 is reasonably arranged according to the placement (horizontal placement, vertical placement, lying placement, etc.) of the cell 201. For example, considering the requirements of access and clamping of the cell 201, the maximum extension length of the cell installation cavity 111 in the first direction is at least 1 mm to 2 mm larger than the length of the cell 201 in the first direction, so as to improve the convenience of access and placement of the cell 201.

[0030] In summary, the battery tray 100 has the advantages of high heating efficiency and convenient transportation, and is suitable for use in the process flow of battery cell 201 production, such as drying, impregnation, aging, etc.

[0031] Optionally, the heat conducting plate 21 should be made of a material with good heat conductivity, small heat capacity and high structural strength. For example, the heat conducting plate 21 can be an aluminum plate, but is not limited thereto.

[0032] The heating element 22 may be connected to the heat conducting plate 21 via an adhesive member, wherein the adhesive member may be a double-sided adhesive member, but is not limited thereto.

[0033] According to the battery tray 100 of the embodiment of the present invention, a plurality of heating components 2 are arranged in the accommodating cavity 11, so that the heating of the battery cell 201 is achieved. At the same time, the elastic force of the elastic member 23 of the heating component 2 is conducive to the heating element 22 to stop against the surface of the battery cell 201 away from the heat conducting plate 21. Compared with the mechanical clamping structure, the structural design of the above-mentioned heating component 2 is more ingenious, and the self-clamping of the battery cell 201 can be achieved with fewer parts, so that the heating element 22 and the battery cell 201 are closely attached, thereby reducing the thermal resistance between the battery cell 201 and the heating element 22, which is beneficial to the heating operation of the heating element 22 on the battery cell 201.

[0034] According to some embodiments of the present invention, referring to Figure 4 The multiple elastic members 23 are arranged in an array, so that the elastic force and the extrusion force on the heat conducting plate 21 and the heating member 22 are relatively balanced, which is beneficial for the multiple elastic members 23 to play a role, and is beneficial for increasing the access convenience and reliability of the battery cell 201 in the battery cell installation cavity 111. At the same time, it avoids some elastic members 23 from being subjected to greater force and reduces the risk of elastic force decay of some elastic members 23.

[0035] Reference Figure 2 and Figure 4 , the spacing between the central axes of two adjacent elastic members 23 is L1, where L1 satisfies: 80mm≤L1≤120mm. When the spacing between the central axes of two adjacent elastic members 23 is less than 80mm, the spacing between the two adjacent elastic members 23 is small, thereby increasing the number of elastic members 23 within the limited plane of the heat conducting plate 21, which is likely to increase the cost of the battery tray 100, and at the same time, it is likely to increase the difficulty of compressing the heat conducting plate 21 in a direction away from the center of the battery cell mounting cavity 111. When the spacing between the central axes of two adjacent elastic members 23 is greater than 120mm, the spacing between the two adjacent elastic members 23 is large, and the number of elastic members 23 that can be connected within the limited plane of the heat conducting plate 21 is small, which is likely to increase the force on a single elastic member 23, and the elastic force decay rate of the elastic member 23, thereby easily reducing the life of the battery tray 100. Therefore, by setting the distance between the central axes of two adjacent elastic parts 23 to 80mm≤L1≤120mm, the distance between two adjacent elastic parts 23 is more reasonable, and the number of elastic parts 23 that can be connected within the limited plane of the heat conducting plate 21 is more reasonable. While giving full play to the elastic force of the elastic parts 23, the elastic force decay speed of the elastic parts 23 is reduced, thereby reducing the service life of the battery tray 100.

[0036] Further, refer to Figure 2 and Figure 4 , the outer diameter of each elastic member 23 is D, where D satisfies: 30mm≤D≤50mm. When the outer diameter of each elastic member 23 is less than 30mm, the outer diameter of each elastic member 23 is small, and under the same compression or tension condition, the elastic force of the elastic member 23 is small; when the outer diameter of each elastic member 23 is greater than 50mm, the outer diameter of each elastic member 23 is large, which is easy to reduce the stiffness of the elastic member 23. Therefore, by controlling the outer diameter of each elastic member 23 to 30mm≤D≤50mm, the stiffness and elastic force of each elastic member 23 are suitable for the use of the battery tray 100.

[0037] The length of each elastic member 23 when not compressed is L2, wherein L2 satisfies: L2≤20mm. In other words, the natural extension length of each elastic member 23 is L2≤20mm. When the length of each elastic member 23 when not compressed is greater than 20mm, the extension length of each elastic member 23 is relatively large, and the side of the elastic member 23 connected to the heat conducting plate 21 is easily deformed downward under the action of gravity, thereby easily reducing the service life of the elastic member 23. Therefore, by controlling the length of each elastic member 23 when not compressed to L2≤20mm, the natural extension length of each elastic member 23 is more reasonable, so that it is easy to give full play to the role of the elastic member 23, and at the same time, the stability and reliability of the use of the elastic member 23 can be improved, and the service life of the elastic member 23 and the heating component 2 using the above-mentioned elastic member 23 can be extended.

[0038] The compression stroke of each elastic member 23 is L3, where L3 satisfies: L3≤5mm. When the compression stroke of each elastic member 23 is greater than 5mm, the compression stroke of the elastic member 23 is large, and the elastic member 23 needs to withstand a large force, which is prone to instability (referring to the elastic member 23 deviating from the straight line state when subjected to axial compression, bending into an S shape or other non-linear shape, which significantly reduces the load-bearing capacity of the elastic member 23). Therefore, by controlling the compression stroke of each elastic member 23 to L3≤5mm, it is beneficial to improve the stability of the elastic member 23, reduce the fatigue failure rate of the elastic member 23, and extend the service life of the elastic member 23 and the heating component 2 using the above-mentioned elastic member 23.

[0039] According to some embodiments of the present invention, the elastic member 23 is a memory spring. The memory spring has advantages such as good stability and long fatigue life. Using the memory spring as the elastic member 23 is conducive to improving the use stability of the heating component 2, improving the clamping reliability of the heating component 2 to the battery cell 201, and extending the service life of the heating component 2.

[0040] The wire diameter of each elastic member 23 is d, where d satisfies: 1mm≤d≤3mm. When the wire diameter of the elastic member 23 is less than 1mm, the elastic member 23 has a smaller stiffness, a smaller deformation under the same force, and a smaller force to restore the deformation; when the wire diameter of the elastic member 23 is greater than 3mm, the elastic member 23 requires a larger force to reach its plastic deformation area, which reduces the efficiency of moving the battery cell 201 into the battery cell installation cavity 111 or removing the battery cell 201 from the battery cell installation cavity 111. Therefore, by controlling the wire diameter of the elastic member 23 to 1mm≤d≤3mm, the stiffness and elastic force of the elastic member 23 are both more reasonable, so that it is easy to give full play to the role of the elastic member 23 and extend the service life of the elastic member 23.

[0041] According to other embodiments of the present invention, the battery tray 100 further includes a plurality of partitions 3, each partition 3 being disposed between two adjacent heating assemblies 2, and both side surfaces of each partition 3 in the first direction abut against the elastic member 23. A partition 3 is provided between two adjacent heating assemblies 2 arranged along the first direction. The elastic member 23 of each heating assembly 2 along the first direction abuts against the partition 3 on the side away from the heat conducting plate 21, thereby facilitating the positioning of the elastic member 23 and preventing the elastic member 23 and the heat conducting plate 21 and the heating member 22 connected to the elastic member 23 from excessively moving away from the center of the battery cell installation cavity 111. That is, the partition 3 can limit the heating assemblies 2 on both sides of the first direction, thereby improving the installation and use stability of the heating assemblies 2, and at the same time improving the limiting reliability of the battery cell installation cavity 111.

[0042] Optionally, the partition 3 can be made of bakelite. No specific limitation is made here. The partition 3 has excellent properties such as good structural strength, insulation and temperature resistance.

[0043] Optionally, at least one battery cell bracket 5 is provided on at least one side of the accommodating cavity 11 along the third direction, and a plurality of grooves are formed on the battery cell bracket 5 at intervals along the first direction, and at least part of the plurality of grooves is suitable for cooperating with at least part of the battery cell 201. Thus, it is helpful to increase the setting stability of the battery cell 201. Among them, the battery cell bracket 5 can be a non-metallic material bracket, such as a hard polyurethane bracket, a hard rubber bracket or a hard foam bracket. But it is not limited thereto.

[0044] According to some embodiments of the present invention, referring to Figure 4 and Figure 5 The heating element 22 includes a heating core 221 and two insulating layers 222, and the two insulating layers 222 are respectively arranged on both sides of the heating core 221 in the first direction. The use of the heating core 221 is not conducive to improving the heating speed and improving the energy conversion efficiency, that is, achieving efficient and uniform heating. The insulating layer 222 protects both sides of the heating core 221 in the first direction to avoid electrical interference between the heating core 221 and the battery cell 201, thereby improving the reliability of the use of the heating core 221 and reducing the influence of the heating element 22 on the battery cell 201.

[0045] Reference Figure 6 and Figure 7, along the direction from the center of the insulating layer 222 to the edge of the insulating layer 222, the power of the heating core 221 gradually decreases. In other words, the power of the heating core 221 is small around and large in the middle. With this arrangement, the structural design of the heating core 221 is more reasonable, so that the heating power of the heating element 22 is small around and large in the middle, so that the air temperature in the middle area of ​​the accommodating cavity 11 is high and the air temperature around is low. As a result, it is beneficial to utilize the air density difference to make the air in the middle area of ​​the accommodating cavity 11 easier to discharge, thereby increasing the stability of the pressure in the accommodating cavity 11 and improving the safety of the battery.

[0046] Among them, adhesive layers 223 can be respectively provided on both sides of the heating core 221, and the adhesive layers 223 are used to connect the heating core 221 and the insulating layer 222 to improve the connection stability between the heating core 221 and the insulating layer 222, thereby facilitating controlling the integrity of the heating element 22.

[0047] Further, refer to Figure 6 The heating core 221 includes a first heating wire 2211. The first heating wire 2211 extends in a spiral shape from the center of the insulating layer 222 to the edge of the insulating layer 222. That is, the first heating wire 2211 extends in a rotational manner from the center of the insulating layer 222 to the edge, thereby gradually extending. Among them, the distance between two adjacent parts of the first heating wire 2211 gradually increases along the direction from the center of the insulating layer 222 to the edge of the insulating layer 222, thereby realizing the control of the power of the heating core 221 to gradually decrease.

[0048] According to other embodiments of the present invention, Figure 7 The heating core 221 includes a second heating wire 2212, which includes a plurality of parallel segments 22121 and a plurality of U-shaped segments 22122. The plurality of parallel segments 22121 are arranged at intervals along the third direction, and each parallel segment 22121 extends along the second direction, and two adjacent parallel segments 22121 are connected by the U-shaped segment 22122. The second heating wire 2212 includes twelve parallel segments 22121 and fourteen U-shaped segments 22122. The twelve parallel segments 22121 are arranged at intervals along the third direction, and seven U-shaped segments 22122 are respectively provided on both sides of the parallel segments 22121. The opening directions of two adjacent U-shaped segments 22122 along the third direction are opposite, so as to facilitate the structural integrity of the second heating wire 2212. The distance between two adjacent parallel segments 22121 in the third direction gradually increases along the direction from the center of the insulating layer 222 to the edge of the insulating layer 222. Therefore, the length of the U-shaped segment 22122 near the center of the insulating layer 222 in the third direction is the smallest, and the length of the U-shaped segment 22122 near the edge of the insulating layer 222 in the third direction is the largest, which is conducive to the design of gradually reducing the power of the heating core 221.

[0049] Among them, the first heating wire 2211 and the second heating wire 2212 are both designed in series. Reducing the line width of the first heating wire 2211 or the second heating wire 2212 can increase the resistance of the heating wire, thereby increasing the heat generation power per unit volume; the smaller the spacing between the first heating wire 2211 or the second heating wire 2212, the greater the surface heating power of the heating core 221.

[0050] Further, refer to Figure 7 In the third direction, the width of each parallel segment 22121 is smaller than the width of each U-shaped segment 22122. This helps control the structural integrity of the second heating wire 2212, increases the concentration of the second heating wire 2212, and avoids the problem of poor structural stability of the second heating wire 2212 due to the sparse structure of the second heating wire 2212.

[0051] According to some embodiments of the present invention, the heating core 221 includes at least one of a brass part, a stainless steel part, a nickel silver part, a PTC carbon-based polymer part, and a PTC ceramic part. The above-mentioned heating core 221 has high thermal conductivity, resistivity, heat resistance, mechanical strength, and stability at high temperatures. Therefore, the use of at least one of the above-mentioned heating cores 221 is conducive to improving the thermal conductivity and heat transfer reliability of the heating core 221. At the same time, the cost of the above-mentioned heating core 221 is low, which is conducive to controlling the production cost of the heating component 2.

[0052] The insulating layer 222 includes at least one of a polyimide component, a polyamide resin component, a polyethylene terephthalate component, and a mica component. The insulating layer 222 has excellent electrical insulation performance and can still maintain mechanical strength at high temperatures. Therefore, using at least one of the insulating layers 222 is conducive to improving the insulation of the heating core 221, thereby reducing the impact of the heating core 221 on the battery 201, and at the same time can improve the structural strength of the insulating layer 222 and improve the structural stability of the heating element 22.

[0053] In addition, the inner wall of the tray body 1 is provided with a heat-insulating layer 4, which is suitable for abutting against the battery cell 201. Thus, the distance between the heat-insulating layer 4 and the battery cell 201 is reduced, which is conducive to limiting and positioning the battery cell 201 by using the heat-insulating layer 4, and at the same time, the heat-insulating layer 4 is used to reduce the heat transfer of the battery cell 201 to the tray body 1, thereby facilitating the maintenance of the temperature stability of the battery cell 201 and improving the reliability and safety of the battery cell 201.

[0054] Further, refer to Figure 1-Figure 3 , and combined with Figure 8, the thickness of the thermal insulation layer 4 is H, where H satisfies: H≥5mm. When the thickness of the thermal insulation layer 4 is less than 5mm, the thermal insulation layer 4 is thinner and the thermal insulation effect is poor. Therefore, by controlling the thickness of the thermal insulation layer 4 to H≥5mm, the thermal insulation effect of the thermal insulation layer 4 is ensured, thereby facilitating the full satisfaction of the need to maintain the temperature of the battery cell 201.

[0055] Reference Figure 1-Figure 3 , and combined with Figure 8 The battery pack 200 according to the second embodiment of the present invention comprises: a battery tray 100, which is the battery tray 100 according to the first embodiment of the present invention; and at least one battery cell 201, which is disposed in the battery cell installation cavity 111 of the battery tray 100.

[0056] The battery pack 200 according to the embodiment of the present invention adopts the above-mentioned battery tray 100, which improves the storage efficiency of the battery cells 201 in the battery tray 100, facilitates the operation of the battery cells 201, and is easy to adjust the temperature of the battery cells 201, thereby improving the reliability of the battery pack 200.

[0057] A vehicle according to an embodiment of a third aspect of the present invention (not shown) comprises: a battery pack 200 according to an embodiment of the second aspect of the present invention.

[0058] The vehicle according to the embodiment of the present invention adopts the above-mentioned battery pack 200, which is beneficial to improving the energy supply stability and reliability of the vehicle, and is beneficial to improving the operating stability and safety of the vehicle, thereby helping to improve the driving experience of the vehicle and improving the market competitiveness of the vehicle.

[0059] Other structures and operations of the battery pack 200 and the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0060] In the description of the present invention, it is to be understood that the terms “center”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0061] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0063] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery tray, characterized in that: include: A tray body, wherein the tray body is formed with a receiving cavity, and the tray body has a first direction, a second direction and a third direction which are orthogonal to each other; A plurality of heating components, each of which is disposed in the accommodating cavity, and the plurality of heating components are spaced apart along the first direction to divide the accommodating cavity into a plurality of battery cell installation cavities, each of which is suitable for placing a battery cell, and each of the heating components extends along the second direction; Wherein, the heating assembly includes a heat conducting plate, a heating element and a plurality of elastic elements, the heating element and the plurality of elastic elements are respectively arranged on both sides of the heat conducting plate in the first direction, and a side of the heating element away from the elastic element is suitable for abutting against the battery cell.

2. The battery tray according to claim 1, characterized in that: The plurality of elastic members are arranged in an array, and the distance between the central axes of two adjacent elastic members is L1, wherein L1 satisfies: 80mm≤L1≤120mm.

3. The battery tray according to claim 2, characterized in that: The outer diameter of each elastic member is D, wherein D satisfies: 30 mm ≤ D ≤ 50 mm; and / or, The length of each elastic member when not compressed is L2, wherein L2 satisfies: L2≤20mm; and / or, The compression stroke of each elastic member is L3, wherein L3 satisfies: L3≤5mm.

4. The battery tray according to any one of claims 1 to 3, characterized in that: The elastic member is a memory spring, and the wire diameter of each of the elastic members is d, wherein d satisfies: 1mm≤d≤3mm.

5. The battery tray according to claim 1, characterized in that: Also includes: A plurality of partitions are provided, each of the partitions is arranged between two adjacent heating components, and both side surfaces of each partition in the first direction abut against the elastic member.

6. The battery tray according to claim 1, characterized in that: The heating element comprises a heating core and two insulating layers, wherein the two insulating layers are respectively arranged on both sides of the heating core in the first direction; The power of the heating core gradually decreases along the direction from the center of the insulation layer to the edge of the insulation layer.

7. The battery tray according to claim 6, characterized in that: The heating core comprises a first heating wire; The first heating wire extends in a spiral shape along a direction from the center of the insulating layer to the edge of the insulating layer.

8. The battery tray according to claim 6, characterized in that: The heating core comprises a second heating wire, the second heating wire comprises a plurality of parallel segments and a plurality of U-shaped segments, the plurality of parallel segments are arranged at intervals along the third direction, and each of the parallel segments extends along the second direction, and two adjacent parallel segments are connected by the U-shaped segment; Along the direction from the center of the insulating layer to the edge of the insulating layer, the distance between two adjacent parallel segments in the third direction gradually increases.

9. The battery tray according to claim 8, characterized in that: In the third direction, a width of each of the parallel segments is smaller than a width of each of the U-shaped segments.

10. The battery tray according to claim 6, characterized in that: The heating core comprises at least one of a brass piece, a stainless steel piece, a nickel silver piece, a PTC carbon-based polymer piece and a PTC ceramic piece; and / or, The insulating layer includes at least one of a polyimide member, a polyamide resin member, a polyethylene terephthalate member and a mica member.

11. The battery tray according to claim 1, characterized in that: The inner wall of the tray body is provided with a heat-insulating layer, and the heat-insulating layer is suitable for abutting against the battery core.

12. The battery tray according to claim 11, characterized in that: The thickness of the thermal insulation layer is H, wherein H satisfies: H≥5mm.

13. A battery pack, characterized in that: include: A battery tray, wherein the battery tray is a battery tray according to any one of claims 1 to 12; At least one battery cell is disposed in the battery cell receiving cavity of the battery tray.

14. A vehicle, characterized in that: include: The battery pack according to claim 13.

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