Vapor chamber and battery

Abstract

The utility model provides a vapor chamber and a battery. The vapor chamber comprises a plate body and a reinforcing structure, an inner cavity is formed in the plate body, the plate body comprises a first plate body and a second plate body which are oppositely arranged, and at least one part of the inner cavity is defined by the first plate body and the second plate body; the reinforcing structure is arranged on the first plate body and located in the inner cavity. The compressive strength of the vapor chamber is larger than or equal to 2.5 MPa. The utility model aims to provide the vapor chamber which is high in loading capacity and expansion resistance and does not influence the overall size of a battery.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a heat spreader and a battery. Background Art

[0002] A heat spreader is a phase change heat transfer element that uses the latent heat of phase change of the working fluid to carry away heat. It is the most promising thermal management method to solve the heat dissipation problem of products and equipment. At present, heat spreaders are mainly used for heat dissipation of electronic equipment. They have excellent thermal conductivity, a large heat transfer area and good temperature uniformity; in particular, they are ultra-thin, and the external dimensions can be adjusted according to actual heat dissipation needs. In related technologies, heat spreaders are used in batteries. During operation, the battery will expand due to the rise in temperature. The thickness of the heat spreader is relatively thin, and the external pressure bearing capacity and internal anti-expansion capacity are weak. It is easy to bend, deform or even break. Although providing a reinforcement structure on the outside of the heat spreader can enhance the strength of the heat spreader, it will increase the overall size of the battery. Utility Model Content

[0003] The embodiments of the present invention provide a vapor chamber and a battery. The present invention aims to provide a vapor chamber with strong pressure bearing capacity and anti-expansion capacity without affecting the overall size of the battery.

[0004] In a first aspect, an embodiment of the present invention provides a vapor chamber, the vapor chamber comprising:

[0005] a plate body, forming an inner cavity, the plate body comprising a first plate body and a second plate body disposed opposite to each other, the first plate body and the second plate body enclosing at least a portion of the inner cavity; and

[0006] a reinforcement structure, provided on the first plate and located in the inner cavity;

[0007] Wherein, the compressive strength of the heat spreader is greater than or equal to 2.5 MPa.

[0008] In one embodiment, the reinforcement structure includes a plurality of reinforcement rib assemblies, each of the reinforcement rib assemblies includes a plurality of reinforcement rib rows, each of the reinforcement rib rows includes a plurality of first reinforcement ribs, and the plurality of first reinforcement ribs are arranged in an array.

[0009] In one embodiment, each of the reinforcing rib rows further includes a second reinforcing rib, a plurality of the second reinforcing ribs are arranged in an array, and a length of at least one of the second reinforcing ribs is less than a length of at least one of the first reinforcing ribs;

[0010] The first plate body also includes a first part, a second part and a third part, the second part is connected between the first part and the third part, multiple first reinforcing ribs are arranged on the first part, multiple second reinforcing ribs are arranged on the third part, and the second part includes a flat plate or a bent plate.

[0011] In one embodiment, the reinforcement structure further includes a third reinforcement rib, which extends along the width direction of the plate body and is provided on the second portion.

[0012] In one embodiment, a plurality of absorbent cores are further included, and a absorbent core installation channel is formed between two adjacent reinforcing rib components, and the absorbent core is installed in the absorbent core installation channel.

[0013] In one embodiment, the reinforcement structure further includes a support structure, the support structure including a plurality of first support rows, each of the first support rows including a plurality of first support columns, and the plurality of first support columns are evenly arranged along the length direction of the plate body;

[0014] In the same reinforcing rib assembly, a support installation channel is provided between two adjacent reinforcing rib rows, and a plurality of first support rows are installed in the support installation channel.

[0015] In one embodiment, in the same support installation channel, two adjacent first support rows are staggered with each other.

[0016] In one embodiment, the reinforcement structure further includes a plurality of second support rows and a plurality of support columns, and the plurality of second support rows and the plurality of support columns surround the plurality of reinforcement rib assemblies.

[0017] In one embodiment, each of the second support rows includes a plurality of second support columns, and a distribution density of the plurality of first support columns is smaller than a distribution density of the plurality of second support columns.

[0018] In one embodiment, the reinforcement structure further comprises a support structure, wherein the support structure comprises a plurality of first support columns;

[0019] In the same reinforcing rib assembly, a support installation channel is provided between two adjacent reinforcing rib rows, and the support installation channel is configured to install a plurality of the first support columns, and the plurality of the first support columns are arranged irregularly.

[0020] In one embodiment, the sum of the areas of the orthographic projections of the reinforcing structure on the first plate is S1, and the cross-sectional area of ​​the inner cavity is S2, wherein (1:124)≤(S1 / S2)≤(0.5:1).

[0021] In one embodiment, the length of the vapor chamber is L1, and the length of each of the first reinforcing ribs is L2, wherein L2 / L1=(0.1-0.7):1; and / or,

[0022] The width of the plate body is H1, and the width of each of the first reinforcing ribs is H2, wherein H2 / H1=(0.01-0.5):1.

[0023] In one embodiment, the length of the vapor chamber is L1, and the length of each of the second reinforcing ribs is L3, wherein L3 / L1=(0.1-0.2):1; and / or,

[0024] The width of the plate body is H1, and the width of each of the second reinforcing ribs is H3, wherein H3 / H1=(0.01-0.5):1.

[0025] In one embodiment, the outer side of the first plate body facing away from the inner cavity is concave, and the inner side of the first plate body close to the inner cavity is convex to form the reinforcement structure.

[0026] In one embodiment, the vapor chamber comprises a stainless steel vapor chamber, and the reinforcement structure is integrally formed by stamping.

[0027] In one embodiment, the vapor chamber comprises a stainless steel vapor chamber, and at least a portion of the reinforcement structure is welded to the second plate body.

[0028] In a second aspect, an embodiment of the present invention provides a battery, including the above-mentioned vapor chamber, wherein the vapor chamber includes:

[0029] a plate body, forming an inner cavity, the plate body comprising a first plate body and a second plate body disposed opposite to each other, the first plate body and the second plate body enclosing at least a portion of the inner cavity; and

[0030] a reinforcement structure, provided on the first plate and located in the inner cavity;

[0031] Wherein, the compressive strength of the heat spreader is greater than or equal to 2.5 MPa.

[0032] Beneficial effects of the embodiments of the present utility model:

[0033] The heat spreader includes a plate body, the plate body is formed with an inner cavity, and the reinforcing structure is arranged in the inner cavity. The reinforcing structure can support the plate body and strengthen the structural strength of the plate body, thereby improving the pressure bearing capacity and anti-expansion capacity of the heat spreader, improving the structural strength of the heat spreader, avoiding the heat spreader from bending, deformation or breakage, and improving the service life of the heat spreader. At the same time, the reinforcing structure is arranged in the inner cavity, does not take up additional space, and does not affect the overall size of the battery. In addition, the compressive strength of the heat spreader is greater than or equal to 2.5MPa, which can avoid the extrusion deformation of the heat spreader due to battery expansion, thereby improving the service life of the heat spreader. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 This is a structural schematic diagram of an embodiment of a vapor chamber provided by the present invention;

[0036] Figure 2 yes Figure 1 A full cross-sectional diagram of the vapor chamber;

[0037] Figure 3 yes Figure 2 A is an enlarged schematic diagram;

[0038] Figure 4 yes Figure 1 A schematic structural diagram of an embodiment of the first plate;

[0039] Figure 5 yes Figure 4 A structural schematic diagram of the first plate from another perspective;

[0040] Figure 6 yes Figure 1 A structural schematic diagram of another embodiment of the first plate;

[0041] Figure 7 yes Figure 1 A structural schematic diagram of another embodiment of the first plate body.

[0042] Explanation of Figure Numbers

[0043] Label name Label name 100 Vapor Chamber 112 Part 3 101 Board body 113 The third reinforcement 102 Lumen 114 wick 103 First plate 115 Wick channel 104 Second plate 116 Silkscreen 105 Strengthening the structure 117 First support row 106 Reinforcement rib components 118 First support column 107 Reinforcement ribs 119 Support mounting channel 108 First reinforcement 120 Second support row 109 Second reinforcement rib 121 Support column 110 Part 1 122 Liquid inlet 111 Part 2 123 Second support column DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0045] In related technologies, a heat spreader is used in a battery. During operation, the battery will expand due to the rise in temperature. The heat spreader is thin, and its external pressure-bearing capacity and internal anti-expansion capacity are weak, making it easy to bend, deform, or even break. Although setting a reinforcing structure on the outside of the heat spreader can enhance the strength of the heat spreader, it will cause the overall size of the battery to increase.

[0046] In view of this, the utility model proposes a heat spreader used as a battery shell. Figures 1 to 6 This is a structural schematic diagram of an embodiment of a heat spreader provided by the present invention. The heat spreader provided by the present invention has strong pressure bearing capacity and anti-expansion capacity, and will not affect the overall size of the battery. The heat spreader will be described in detail below in conjunction with the main drawings.

[0047] See also Figure 1 、 Figure 2 and Figure 3 Vapor chamber 100 includes a plate body 101 and a reinforcement structure 105. Plate body 101 defines an inner cavity 102, in which a working fluid is disposed for heat transfer. Plate body 101 comprises a first plate body 103 and a second plate body 104, which are positioned opposite each other and enclose at least a portion of inner cavity 102. Reinforcement structure 105 is disposed on first plate body 103 and within inner cavity 102. Vapor chamber 100 has a compressive strength greater than or equal to 2.5 MPa.

[0048] The heat spreader 100 provided by the present invention is applied to the battery shell, which has a simple structure, low manufacturing cost and high efficiency in heat diffusion. The heat spreader 100 includes a plate body 101, which is formed with an inner cavity 102. A plurality of reinforcing structures 105 are arranged in the inner cavity 102. The plurality of reinforcing structures 105 can support the plate body and strengthen the structural strength of the plate body 101, thereby improving the pressure bearing capacity and anti-expansion capacity of the heat spreader 100, improving the structural strength of the heat spreader 100, avoiding the heat spreader 100 from bending, deformation or fracture, and improving the service life of the heat spreader 100. At the same time, the plurality of reinforcing structures 105 are arranged in the inner cavity 102, do not occupy additional space, and will not affect the overall size of the battery. In addition, the compressive strength of the heat spreader 100 is greater than or equal to 2.5 MPa, which can solve the extrusion deformation of the heat spreader 100 caused by the expansion of the battery in the related art, and improve the service life of the heat spreader 100.

[0049] In some embodiments, the first plate 103 is a lower shell plate, and the second plate 104 is an upper shell plate. The upper shell plate and the lower shell plate are respectively formed with a first receiving groove and a second receiving groove. The upper shell plate and the lower shell plate are welded together so that the first receiving groove and the second receiving groove are connected to form the inner cavity 102. It should be noted that the specific position of the reinforcement structure 105 is not limited, and it only needs to be located in the inner cavity 102. In the above embodiment, the reinforcement structure 105 is provided on the first plate 103. Of course, the reinforcement structure 105 can also be provided on the second plate 104. The selection can be made according to the actual situation. Since the first plate 103 is the lower shell plate, the reinforcement structure 105 is provided on the first plate 103, which makes it more convenient to weld the first plate 103 and the second plate 104.

[0050] See also Figure 4 and Figure 5The specific type of reinforcement structure 105 is not limited, as long as it can meet the compressive strength requirements of the heat spreader 100. In this embodiment, the reinforcement structure 105 includes a plurality of reinforcing rib assemblies 106, which are spaced apart along the width of the body. Each reinforcing rib assembly 106 includes a plurality of reinforcing rib rows 107, which are spaced apart along the width of the body. Furthermore, each reinforcing rib row 107 includes a plurality of first reinforcing ribs 108, which extend along the length of the plate body 101, and the plurality of reinforcing rib rows 107 are spaced apart along the length of the plate body 101. In the width direction of the plate body 101, the ends of two adjacent first reinforcing ribs 108 correspond to each other, so that the plurality of first reinforcing ribs 108 are arranged in an array. It should be noted that multiple first reinforcing ribs 108 are arranged in an array and evenly distributed on the first plate body 103, which can improve the uniformity of force on the plate body 101, so that the structural strength of each part of the plate body 101 is basically the same, thereby improving the overall structural strength of the plate body 101, avoiding the situation where local force deformation of the heat spreader 100 due to insufficient local strength, and improving the service life of the heat spreader 100.

[0051] Furthermore, each rib row 107 includes a plurality of first ribs 108, which are evenly distributed. In some embodiments, the distance between two adjacent first ribs 108 along the length of the plate body 101 is the same. In other embodiments, the distance between two adjacent first ribs 108 along the length of the plate body 101 is arranged in a progressively increasing or decreasing manner. The specific arrangement can be selected based on actual conditions and is not limited here.

[0052] Since the vapor chamber 100 is used in different environments, the forces or expansion forces applied to each part of the vapor chamber 100 are also different. Figure 4 and Figure 5 In this embodiment, each rib row 107 further includes second ribs 109, with multiple second ribs 109 arranged in an array. The length of at least one second rib 109 is less than the length of at least one first rib 108. Since the length of the second rib 109 is less than the length of the first rib 108, the first ribs 108 can be applied to areas with greater forces, while the second ribs 109 can be applied to areas with less forces. This allows for a reasonable allocation of the first and second ribs 108, improving space utilization.

[0053] Generally, the battery case has six shell surfaces. The vapor chamber 100 can be applied to any shell surface of the battery case, or to multiple shell surfaces at the same time. For example, the vapor chamber 100 can be applied to two adjacent shell surfaces of the battery case. When the vapor chamber 100 is applied to two adjacent shell surfaces of the battery case, two independent vapor chambers 100 can be placed on the two shell surfaces of the battery case, and then the two vapor chambers 100 can be welded together. In another embodiment, please refer to Figure 6 , a heat spreader 100 is bent so that it can serve as two shell surfaces of the battery housing. The specific selection can be made according to the size of the battery.

[0054] In some other embodiments, the heat spreader 100 can also be used as a cooling plate. The battery includes a battery casing and a core pack group. The core pack group is installed in the battery casing, and the heat spreader 100 is installed between the core pack group and the battery casing to cool the core pack. Furthermore, the core pack group also includes multiple core pack rows, and the multiple core pack rows are arranged at intervals. In order to improve the cooling efficiency, the heat spreader 100 can also be arranged between two adjacent core pack rows, so as to achieve cooling on multiple sides, improve the cooling efficiency, and avoid thermal runaway.

[0055] Specifically, in order to enable the heat spreader 100 to meet different application scenarios, in this embodiment, the first plate body 103 also includes a first portion 110, a second portion 111 and a third portion 112. The second portion 111 is connected between the first portion 110 and the third portion 112. The first portion 110, the second portion 111 and the third portion 112 are integrally formed. A plurality of first reinforcing ribs 108 are provided on the first portion 110, and a plurality of second reinforcing ribs 109 are provided on the third portion 112; the second portion 111 can be bent. For example, see Figure 4 In one embodiment, when the heat spreader 100 is applied to a certain shell surface of the battery housing, the second portion 111 is a flat plate, and the first portion 110, the second portion 111 and the third portion 112 are located on the same plane. In another embodiment, please refer to Figure 6 The heat spreader 100 is applied to two adjacent shell surfaces of the battery housing. At this time, the second portion 111 is bent, the second portion 111 is a bent plate, and the first portion 110 and the third portion 112 are located on different planes.

[0056] Specifically, when the first portion 110 and the third portion 112 are located on the same plane, the vapor chamber 100 has an "I"-shaped structure. When the first portion 110 and the third portion 112 are located on different planes, the vapor chamber 100 has an "L"-shaped structure. More specifically, two "L"-shaped vapor chambers 100 can be combined to form a "T"-shaped vapor chamber 100. The choice of configuration depends on the actual situation.

[0057] Furthermore, when the second portion 111 is a bent plate, the bending angle of the second portion 111 is α, and α is 90-95°. As a preferred embodiment, α is 90°.

[0058] In some embodiments, the reinforcement structure 105 further includes third reinforcing ribs 113, which extend along the width of the plate body 101 and are disposed on the second portion 111. The third reinforcing ribs 113 serve to enhance the structural strength of the second portion 111. When the second portion 111 is a bent plate, the vapor chamber 100 needs to be bent. The third reinforcing ribs 113 can enhance the structural strength of the vapor chamber 100 and prevent breakage during the bending process.

[0059] In some embodiments, see Figure 1 The vapor chamber 100 further includes a plurality of wicks 114 extending along the length of the plate body 101 and spaced apart within the inner cavity 102 along the width of the plate body 101. Specifically, a wick mounting channel 115 is formed between two adjacent rib assemblies 106. The wick mounting channel 115 extends along the length of the plate body 101 and is configured to receive the wicks 114. The wicks 114 are capable of absorbing the working fluid and diffusing it into the inner cavity 102, allowing the working fluid to fill the inner cavity 102 and improve heat dissipation.

[0060] In some embodiments, the width of the wick installation channel 115 is 14-20 mm. More specifically, the width of the wick installation channel 115 can be 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, or 20 mm.

[0061] In some embodiments, please refer to Figure 1 The vapor chamber 100 further includes a wire mesh 116 , which is disposed in the inner cavity 102 and above the plurality of wicks 114 .

[0062] In some implementations, the reinforcement structure 105 further includes a support structure comprising a plurality of first support rows 117. Each first support row 117 includes a plurality of first support columns 118. The plurality of first support columns 118 are located within the inner cavity 102, with one end of each support column connected to the first plate 103 and the other end of each support column connected to the second plate 104. The plurality of support columns are used to support the first plate 103 and the second plate 104. Furthermore, within the same reinforcement rib assembly 106, a support mounting channel 119 is provided between two adjacent reinforcement rib rows 107. The support mounting channel 119 is configured to mount the plurality of first support rows 117. This arrangement prevents interference between the first support rows 117 and the first reinforcement ribs 108, resulting in high space utilization.

[0063] Furthermore, it should be noted that, in order to avoid interference with the installation of the wick 114 , the wick installation channel 115 is not provided with a plurality of first support columns 118 .

[0064] In some embodiments, adjacent first support rows 117 are staggered within the same support mounting channel 119. The adjacent first support rows 117 are first support row a and first support row b. First support row a includes a plurality of first support columns a, and first support row b includes a plurality of first support columns b. A first support column b exists between adjacent first support columns a. This arrangement improves the compressive strength of the vapor chamber 100.

[0065] In some embodiments, since the first reinforcing ribs 108 and the second reinforcing ribs 109 are generally located in the middle of the first plate body 103, the strength at the edge of the first plate body 103 is relatively weak. In order to increase the structural strength of the distal ends of the first plate body 103, the reinforcing structure 105 further includes a plurality of second support rows 120 and a plurality of support columns 121. The plurality of second support rows 120 and the plurality of support columns 121 surround the plurality of reinforcing rib assemblies 106. Specifically, in this embodiment, there are two second support rows 120 and two second support columns 121. The two second support rows 120 are located on both sides of the reinforcing structure 105 along the width direction of the plate body 101, and the two support columns 121 are located on both sides of the reinforcing structure 105 along the length direction of the plate body 101.

[0066] In this embodiment, each second support row 120 includes a plurality of second support columns 123. It should be noted that, due to the limited space at the edge of the first plate 103, the density of the plurality of second support columns 123 is relatively high in the second support row 120 to accommodate more second support columns 123. Furthermore, the density of the plurality of first support columns 118 is less than the density of the plurality of second support columns 123.

[0067] In the above embodiment, the plurality of first support columns 118 are arranged regularly. In other implementations, the plurality of first support columns 118 are arranged irregularly. It should be noted that although the plurality of first support columns 118 are arranged irregularly, considering that the wick 114 needs to be installed in the wick installation channel 115, in order to avoid interference with the installation of the wick 114, the plurality of first support columns 118 are not provided in the wick installation channel 115.

[0068] In some embodiments, the wire mesh 116 is formed with a plurality of vias corresponding to the first support pillars 118. The first support pillars 118 pass through the vias and connect to the second plate 104. This arrangement allows the first support pillars 118 to secure the wire mesh 116, thereby improving the structural stability of the vapor chamber 100. Furthermore, the diameter of the vias is 10-15 mm. More specifically, the diameter of the vias can be 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, or other values ​​not listed.

[0069] In some embodiments, the diameter of the first support pillars 118 is 1 to 3 mm. Specifically, the diameter of the first support pillars 118 can be 1 mm, 1.2 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2 mm, 2.1 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.7 mm, 2.9 mm, 3 mm, or other unlisted values. When the plurality of first support pillars 118 are regularly arranged, the spacing between the axes of two adjacent first support pillars 118 is 4 to 8 mm. Specifically, the spacing between the axes of two adjacent first support pillars 118 can be 4 mm, 4.2 mm, 4.5 mm, 4.7 mm, 4.8 mm, 5 mm, 5.1 mm, 5.4 mm, 5.5 mm, 5.9 mm, 6 mm, 6.6 mm, 6.9 mm, 7 mm, 7.1 mm, 7.2 mm, 7.3 mm, 7.8 mm, 8 mm, or other unlisted values.

[0070] In some embodiments, the sum of the areas of the orthographic projections of the reinforcing structures 105 on the first plate 103 is S1, and the area of ​​the cross section of the inner cavity 102 is S2, wherein (1:124)≤(S1 / S2)≤(0.5:1). It should be noted that when S1 / S2 is less than 1 / 124, the number of reinforcing structures 105 is small, resulting in a low structural strength of the heat spreader 100, which is prone to deformation or even breakage during use. When S1 / S2 is greater than 0.5, the reinforcing structures 105 occupy a larger volume of the inner cavity 102, resulting in less working fluid in the inner cavity 102 and a lower cooling efficiency of the heat spreader 100.

[0071] Further, in some embodiments, see Figure 5, the length of the heat spreader 100 is L1, and the length of each first reinforcement rib 108 is L2, where L2 / L1=(0.1~0.7):1. It should be noted that the length of the first reinforcement rib 108 should not be too long or too short. When L2 / L1 is less than 0.1, the length of the first reinforcement rib 108 is too short. In order to meet the structural strength of the heat spreader 100, the number of first reinforcement ribs 108 will increase accordingly, resulting in increased manufacturing difficulty and increased manufacturing costs. When L2 / L1 is greater than 0.7, the length of the first reinforcement rib 108 increases, which will similarly lead to increased manufacturing difficulty and increased manufacturing costs.

[0072] In some embodiments, see Figure 5 , the width of the plate body 101 is H1, and the width of each first reinforcing rib 108 is H2, wherein H2 / H1=(0.01~0.5):1. It should be noted that the width of the first reinforcing rib 108 should not be too long or too short. When H2 / H1 is less than 0.01, the width of the first reinforcing rib 108 is too short. In order to meet the structural strength of the heat spreader 100, the number of the first reinforcing ribs 108 will increase accordingly, resulting in increased manufacturing difficulty and increased manufacturing costs. When H2 / H1 is greater than 0.1, the width of the first reinforcing rib 108 increases, which will similarly lead to increased manufacturing difficulty and increased manufacturing costs.

[0073] In some embodiments, see Figure 5 , the length of each second reinforcing rib 109 is L3, where L3 / L1=(0.1~0.2):1. It should be noted that the width of the second reinforcing rib 109 should not be too long or too short. When L3 / L1 is less than 0.1, the width of the second reinforcing rib 109 is too short. In order to meet the structural strength of the heat spreader 100, the number of second reinforcing ribs 109 will increase accordingly, resulting in increased manufacturing difficulty and increased manufacturing costs. When L2 / L1 is greater than 0.2, the width of the second reinforcing rib 109 increases, which similarly increases the difficulty of manufacturing costs and increases manufacturing costs.

[0074] In some embodiments, see Figure 5 , the width of the plate body 101 is H1, and the width of each second reinforcing rib 109 is H3, wherein H3 / H1=(0.01~0.5):1. It should be noted that the width of the second reinforcing rib 109 should not be too long or too short. When H3 / H1 is less than 0.01, the width of the second reinforcing rib 109 is too short. In order to meet the structural strength of the heat spreader 100, the number of second reinforcing ribs 109 will increase accordingly, resulting in increased manufacturing difficulty and increased manufacturing cost. When H3 / H1 is greater than 0.1, the width of the second reinforcing rib 109 increases, which will similarly lead to increased manufacturing difficulty and increased manufacturing cost.

[0075] In some embodiments, see Figure 1 A liquid inlet 122 is also formed on the heat spreader 100 . The liquid inlet 122 is in communication with the inner cavity 102 and is used to input the working fluid into the inner cavity 102 .

[0076] It should be noted that the specific material of the vapor chamber is not limited and can be selected according to actual conditions. In some embodiments, the vapor chamber comprises a stainless steel vapor chamber, specifically a SUS304 material. Stainless steel vapor chambers have higher strength, greater deformation resistance, and better thermal conductivity.

[0077] In one embodiment, a mold is used to remove material from the first plate body 103 through etching or other processes to manufacture the first reinforcing rib 108, the second reinforcing rib 109, the third reinforcing rib 113, the first support column 118 and the second support column 123, which can increase the structural strength and deformation resistance of the heat spreader 100.

[0078] In another embodiment, see Figure 7 The outer side of the first plate 103 facing away from the inner cavity is concave, and the inner side of the first plate 103 close to the inner cavity is convex, thereby forming the reinforcement structure 105. More specifically, the first plate 103 is placed on a punching machine, and the punch is aligned with the outer side of the first body 103, and punching is performed from the outer side to the inner side to form the reinforcement structure 105 on the first plate 103. This arrangement can save material.

[0079] More specifically, in this embodiment, please continue to refer to Figure 7 The reinforcing structure 105 is integrally formed by stamping, that is, the first plate 103 is placed on a stamping machine, and the first reinforcing rib 108, the second reinforcing rib 109, the third reinforcing rib 113, the first support column 118 and the second support column 123 are stamped out on the first body 103 by the stamping machine. The molding process is simple and saves raw materials.

[0080] In some embodiments, at least part of the reinforcing structure 105 is welded to the second plate body 104, and an inner cavity 102 is formed between the first plate body 103 and the second plate body 104. The inner cavity 102 is used to accommodate the working fluid, so the structural strength of the area forming the inner cavity 102 is relatively weak. In order to improve the structural strength of this part, multiple first support columns 118 and multiple second support columns 123 are welded to connect the second plate body 104. In this way, the first plate body 103 and the second plate body 104 are supported by multiple first support columns 118 and multiple second support columns 123, thereby improving the structural strength of the heat spreader 100; in addition, the welding connection method facilitates automated production and improves production efficiency.

[0081] The present invention also provides a battery comprising at least one vapor chamber 100 as described above. The specific structure of vapor chamber 100 is similar to the above-described embodiments. Since the present battery utilizes all of the technical solutions of all of the above-described embodiments, it possesses at least all of the beneficial effects brought about by the technical solutions of the above-described embodiments, and therefore will not be further detailed here.

[0082] Specifically, in one embodiment, the battery further includes a battery housing, which is formed of a vapor chamber 100. That is, each of the six sides of the battery housing can be formed with a vapor chamber 100. This arrangement can save space and improve space utilization. It should be noted that the six vapor chambers 100 can be interconnected or not, depending on the actual situation.

[0083] In another embodiment, the battery further includes a battery housing and a core pack assembly. The core pack assembly is disposed within the battery housing and includes a plurality of core pack rows, the plurality of core pack rows being spaced apart, each core pack row including a plurality of core packs. Specifically, a vapor chamber 100 is disposed between the core pack assembly and the battery housing. Furthermore, to improve cooling efficiency, a vapor chamber 100 may also be disposed between adjacent core pack rows, enabling multi-sided cooling, improving cooling efficiency, and preventing thermal runaway.

[0084] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, based on the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A heat sink, characterized in that: The vapor chamber comprises: a plate body, forming an inner cavity, the plate body comprising a first plate body and a second plate body disposed opposite to each other, the first plate body and the second plate body enclosing at least a portion of the inner cavity; and a reinforcement structure, provided on the first plate and located in the inner cavity; Wherein, the compressive strength of the heat spreader is greater than or equal to 2.5 MPa.

2. The vapor chamber according to claim 1, wherein: The reinforcement structure includes a plurality of reinforcement rib components, each of the reinforcement rib components includes a plurality of reinforcement rib rows, each of the reinforcement rib rows includes a plurality of first reinforcement ribs, and the plurality of first reinforcement ribs are arranged in an array.

3. The vapor chamber according to claim 2, wherein: Each of the reinforcing rib rows further includes a second reinforcing rib, a plurality of the second reinforcing ribs are arranged in an array, and a length of at least one of the second reinforcing ribs is less than a length of at least one of the first reinforcing ribs; The first plate body also includes a first part, a second part and a third part, the second part is connected between the first part and the third part, multiple first reinforcing ribs are arranged on the first part, multiple second reinforcing ribs are arranged on the third part, and the second part includes a flat plate or a bent plate.

4. The vapor chamber according to claim 3, wherein: The reinforcement structure further includes a third reinforcement rib extending along the width direction of the plate body and provided on the second portion.

5. The vapor chamber according to claim 2, wherein: It also includes a plurality of absorbent cores, a absorbent core installation channel is formed between two adjacent reinforcing rib components, and the absorbent core is installed in the absorbent core installation channel.

6. The vapor chamber according to any one of claims 2 to 5, wherein: The reinforcement structure further includes a support structure, the support structure including a plurality of first support rows, each of the first support rows including a plurality of first support columns, and the plurality of first support columns are evenly arranged along the length direction of the plate body; In the same reinforcing rib assembly, a support installation channel is provided between two adjacent reinforcing rib rows, and a plurality of the first support rows are installed in the support installation channel.

7. The vapor chamber according to claim 6, wherein: In the same support installation channel, two adjacent first support rows are staggered with each other.

8. The vapor chamber according to claim 6, wherein: The reinforcement structure further includes a plurality of second support rows and a plurality of support columns, wherein the plurality of second support rows and the plurality of support columns surround the plurality of reinforcement rib assemblies.

9. The vapor chamber according to claim 8, wherein: Each of the second support rows includes a plurality of second support columns, and a distribution density of the plurality of first support columns is smaller than a distribution density of the plurality of second support columns.

10. The vapor chamber according to any one of claims 2 to 5, wherein: The reinforcement structure further includes a support structure, wherein the support structure includes a plurality of first support columns; In the same reinforcing rib assembly, a support installation channel is provided between two adjacent reinforcing rib rows, and a plurality of the first support columns are installed in the support installation channel, and the plurality of the first support columns are arranged irregularly.

11. The vapor chamber according to claim 3 or 4, characterized in that: The sum of the areas of the orthographic projections of the reinforcing structure on the first plate is S1, and the area of ​​the cross section of the inner cavity is S2, wherein (1:124)≤(S1 / S2)≤(0.5:1).

12. The vapor chamber according to claim 11, wherein: The length of the vapor chamber is L1, and the length of each of the first reinforcing ribs is L2, wherein L2 / L1=(0.1-0.7):1; and / or, The width of the plate body is H1, and the width of each of the first reinforcing ribs is H2, wherein H2 / H1=(0.01-0.5):

1.

13. The vapor chamber according to claim 11, wherein: The length of the vapor chamber is L1, and the length of each of the second reinforcing ribs is L3, wherein L3 / L1=(0.1-0.2):1; and / or, The width of the plate body is H1, and the width of each of the second reinforcing ribs is H3, wherein H3 / H1=(0.01-0.5):

1.

14. The vapor chamber according to claim 1, wherein: The outer side of the first plate body facing away from the inner cavity is concave, and the inner side of the first plate body close to the inner cavity is convex to form the reinforcement structure.

15. The vapor chamber according to claim 13, wherein: The heat spreader includes a stainless steel heat spreader, and the reinforcement structure is formed by stamping in one piece.

16. The vapor chamber according to claim 1, wherein: The vapor chamber comprises a stainless steel vapor chamber, and at least a portion of the reinforcement structure is welded to the second plate body.

17. A battery, characterized in that: The method comprises the heat diffusion plate according to any one of claims 1 to 16.

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