Vapor chamber and battery

Abstract

The utility model provides a vapor chamber and a battery, the vapor chamber comprises a plate body, an inner cavity is formed in the plate body, the plate body comprises two plate bodies which are oppositely arranged along a first direction, and at least one plate body comprises a core material layer and a protective layer which is positioned on at least one side of the core material layer in the first direction; the thickness of the core material layer is B1, the thickness of the protective layer is A1, and A1: B1 = (0.0005-0.2): 1. The utility model aims to solve the technical problems that the conventional vapor chamber is poorer in corrosion resistance and shorter in service life.

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. The heat spreader includes an upper shell and a lower shell. An inner cavity is formed between the lower shell and the upper shell. The inner cavity is provided with a working fluid. The upper shell and the lower shell are generally made of copper, which makes the upper shell and the lower shell easily corroded, and the service life of the heat spreader is reduced. Utility Model Content

[0003] The embodiments of the present utility model provide a vapor chamber and a battery, aiming to solve the technical problems of poor corrosion resistance and short service life of existing vapor chambers.

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

[0005] A plate body is formed with an inner cavity, and the plate body includes two plate bodies arranged opposite to each other along a first direction, at least one of the plate bodies includes a core material layer and a protective layer located on at least one side of the core material layer in the first direction, the thickness of the core material layer is B1, the thickness of the protective layer is A1, and A1:B1=(0.0005~0.2):1.

[0006] In one embodiment, the core material layer includes a stainless steel layer or a copper layer, and the protective layer includes any one of a nickel layer, a chromium layer, a zinc layer, an organic coating and a Teflon coating.

[0007] In one embodiment, the protective layers are formed on opposite sides of the core material layer by vacuum ion plating.

[0008] In one embodiment, each of the plates comprises:

[0009] base plate;

[0010] a side panel disposed around the bottom panel; and

[0011] A mounting plate, bent and connected to one end of the side plate away from the bottom plate and extending in a direction away from the bottom plate;

[0012] Wherein, the two mounting plates of the two plate bodies are connected via a welding connection portion.

[0013] In one embodiment, the welding connection is configured to be formed by welding the two mounting plates at the welding edges of the mounting plates;

[0014] The shortest distance between the welding edge and the end of the mounting plate away from the side plate is L1, 5mm≤L1≤15mm.

[0015] In one embodiment, the bottom plate and the side plate of each plate body form a groove, and the two grooves of the two plate bodies are connected to form the inner cavity, and the working fluid is provided in the inner cavity.

[0016] In one embodiment, the plate body has the groove formed by stamping.

[0017] In one embodiment, it further comprises a plurality of absorbent cores and a wire mesh, wherein the plurality of absorbent cores are located in the inner cavity and are spaced apart on one of the plates, and the wire mesh is disposed between the plurality of absorbent cores and the other plate.

[0018] In one embodiment, the wick comprises any one of a stainless steel wick and a copper wick; and / or,

[0019] The wire mesh includes any one of a stainless steel wire mesh and a copper wire mesh.

[0020] In one embodiment, the overall thickness of the vapor chamber is H1, the thickness of the plate is H2, H2:H1=(0.01-0.2):1; and / or,

[0021] The overall thickness of the vapor chamber is H1, the thickness of the wire mesh is H3, H3:H1=(0.01-0.7):1; and / or,

[0022] The overall thickness of the heat spreader is H1, the thickness of the wick is H4, and H4:H1=(0.015-0.8):1.

[0023] In one embodiment, the cross-section of the vapor chamber has a shape of at least one of an "I" shape, an "L" shape, and a "T" shape.

[0024] In a second aspect, an embodiment of the present invention provides a battery, including a vapor chamber, wherein the vapor chamber includes:

[0025] A plate body is formed with an inner cavity, the plate body comprising two plate bodies arranged opposite to each other along a first direction, at least one of the plate bodies comprising a core material layer and a protective layer located on at least one side of the core material layer in the first direction;

[0026] The core material layer includes a stainless steel layer, the protective layer includes any one of a nickel layer, a chromium layer and a zinc layer, the thickness of the core material layer is B1, and the thickness of the protective layer is A1.

[0027] Beneficial effects of the embodiments of the present utility model:

[0028] The heat spreader provided by the present invention has a simple structure, strong corrosion resistance, and a long service life. Specifically, the plate body includes a core material layer and a protective layer. The protective layer is provided on the core material layer to protect the core material layer and form a dense passivation film on the outer surface of the core material layer, effectively preventing the core material layer from reacting with other substances, thereby extending the service life of the heat spreader. At the same time, the thickness of the core material layer is B1, and the thickness of the protective layer is A1. A1:B1 = (0.0005~0.2):1. Within the above range, the core material layer can be prevented from being corroded, and the service life of the heat spreader can be increased. At the same time, the thickness of the heat spreader will not be too thick, which will increase the space occupied. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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.

[0030] Figure 1 This is an exploded schematic diagram of a vapor chamber provided in an embodiment of the present utility model;

[0031] Figure 2 yes Figure 1 A full cross-sectional diagram of the middle plate body;

[0032] Figure 3 yes Figure 1 A full cross-sectional diagram of the vapor chamber;

[0033] Figure 4 yes Figure 3 A is an enlarged schematic diagram;

[0034] Figure 5 yes Figure 1 Schematic diagram of the structure of the middle plate;

[0035] Figure 6 yes Figure 5 A magnified schematic diagram of middle B;

[0036] Figure 7 This is a structural diagram of an embodiment of a vapor chamber provided by the present invention;

[0037] Figure 8This is a structural schematic diagram of another embodiment of the heat sink provided by the present invention;

[0038] Figure 9 This is a structural schematic diagram of another embodiment of the heat spreader provided by the present invention.

[0039] Explanation of Figure Numbers

[0040] Label name Label name 100 Vapor Chamber 107 protective layer 101 Board body 108 baseplate 102 Lumen 109 Side panels 103 plate body 110 Mounting plate 104 First plate 112 wick 105 Second plate 113 Silkscreen 106 Core layer 114 Liquid outlet DETAILED DESCRIPTION

[0041] 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.

[0042] In related technologies, a heat spreader is used in a battery. The heat spreader includes an upper shell and a lower shell. An inner cavity is formed between the lower shell and the upper shell. The inner cavity is provided with a working fluid. The upper shell and the lower shell are generally made of copper, which makes the upper shell and the lower shell easily corroded, and the service life of the heat spreader is reduced.

[0043] In view of this, the utility model proposes a heat sink. Figures 1 to 9 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 a simple structure, strong corrosion resistance, strong structural strength, and a long service life. The heat spreader will be described in detail below in conjunction with the main drawings.

[0044] See also Figure 1 and Figure 2 The vapor chamber 100 includes a plate body 101, which defines an inner cavity 102. A working fluid is disposed within the inner cavity 102 for heat transfer. Plate body 101 includes two plates 103 disposed opposite each other along a first direction. At least one plate 103 includes a core layer 106 and a protective layer 107 located on at least one side of the core layer 106 in the first direction. The thickness of the core layer 106 is B1, and the thickness of the protective layer 107 is A1. A1:B1 = (0.0005-0.2):1.

[0045] The heat spreader 100 provided by the present invention has a simple structure, strong corrosion resistance, and a long service life. Specifically, the plate body 103 includes a core material layer 106 and a protective layer 107. The protective layer 107 is provided on the core material layer 106 and can protect the core material layer 106. A dense passivation film is formed on the outer surface of the core material layer 106, effectively preventing the core material layer 106 from reacting with other substances, thereby extending the service life of the heat spreader 100. At the same time, the thickness of the core material layer 106 is B1, and the thickness of the protective layer 107 is A1. A1:B1=(0.0005~0.2):1. Within the above range, the core material layer 106 can be prevented from being corroded, thereby improving the service life of the heat spreader 100. At the same time, the thickness of the heat spreader 100 will not be too thick, which will increase the space occupied.

[0046] In some embodiments, the core material layer 106 includes a stainless steel layer or a copper layer, and the protective layer 107 includes any one of a nickel layer, a chromium layer, a zinc layer, an organic coating, and a Teflon coating.

[0047] The core material layer 106 includes a stainless steel layer and a copper layer. The activity of the stainless steel layer and the copper layer is relatively poor, generally do not react with other substances, and have good corrosion resistance. At the same time, the structural strength of the stainless steel layer and the copper layer is strong, not easy to deform, and can increase the service life of the heat spreader 100; at the same time, a protective layer 107 is provided on the outside of the core material layer 106. The protective layer 107 includes any one of a nickel layer, a chromium layer, a zinc layer, an organic coating and a Teflon coating. The activity of the nickel layer, the chromium layer and the zinc layer, the organic coating and the Teflon coating is relatively poor, and basically do not react with other substances. The protective layer 107 is provided on the core material layer 106, which can protect the core material layer 106 and form a dense passivation film on the outer surface of the core material layer 106, which effectively prevents the core material layer 106 from reacting with other substances, thereby extending the service life of the heat spreader 100. At the same time, the protective layer 107 can also improve the aesthetics of the plate, making the appearance of the heat spreader 100 more beautiful.

[0048] It should be noted that when A1 / B1 is less than 0.0005, the thickness of core layer 106 is small, resulting in a smaller thickness of plate body 103, weaker structural strength of plate body 103, and a smaller thickness of protective layer 107. During use, working fluid, electrolyte, or colloid can easily penetrate into core layer 106, causing corrosion of core layer 106 and easily damaging vapor chamber 100 during use, thus shortening the service life of vapor chamber 100. When A1 / B1 is greater than 0.2, the thickness of core layer 106 and protective layer 107 are greater, resulting in an increase in the overall size of vapor chamber 100 and a larger occupied space.

[0049] In some embodiments, the thickness of the protective layer 107 is 0.001 to 0.05 mm. Specifically, the thickness of the protective layer can be 0.001 mm, 0.002 mm, 0.005 mm, 0.006 mm, 0.01 mm, 0.015 mm, 0.018 mm, 0.022 mm, 0.025 mm, 0.026 mm, 0.028 mm, 0.03 mm, 0.031 mm, 0.035 mm, 0.038 mm, 0.04 mm, 0.042 mm, 0.047 mm, 0.05 mm or other unlisted data.

[0050] It should be noted that the positional relationship between the core material layer 106 and the protective layer 107 is not limited. In one embodiment, a working fluid is provided in the inner cavity 102 of the heat spreader 100. In order to prevent the two plate bodies 103 from being corroded by the working fluid, a protective layer 107 is provided on the side of the two plate bodies 103 in contact with the working fluid. Such a setting can save materials and reduce costs. In another embodiment, the heat spreader 100 is used in a battery. One side of the plate body 103 needs to be in contact with the working fluid, and the other side of the plate body 103 needs to be in contact with the electrolyte or colloid. Therefore, in order to prevent the plate body 103 from being corroded, the protective layer 107 is wrapped around the outside of the core material layer 106.

[0051] In this embodiment, the two plates 103 are respectively a first plate 104 and a second plate 105 . The first plate 104 is a lower shell plate, and the second plate 105 is an upper shell plate. The upper shell plate and the lower shell plate are connected by welding.

[0052] Specifically, in this embodiment, in order to improve the service life of the heat spreader 100, the protective layer 107 wraps the core material layer 106. More specifically, the protective layer 107 is formed on the outside of the core material layer 106 by vacuum ion plating. Vacuum ion plating is simple to operate, has low cost, and has a stable coating, so that the protective layer 107 and the core material layer 106 can be in close contact, so that the protective layer 107 forms a dense passivation film on the outer surface of the core material layer 106, effectively preventing the core material layer 106 from reacting with other substances, thereby extending the service life of the heat spreader 100. The specific operation method and precautions of vacuum ion plating can refer to the conventional settings in the field, and will not be repeated here.

[0053] In some embodiments, see Figure 5 and Figure 6Each plate 103 includes a bottom plate 108, side plates 109, and a mounting plate 110. The side plates 109 surround the bottom plate 108. The mounting plate 110 is bent and connected to the end of the side plates 109 away from the bottom plate 108 and extends in a direction away from the bottom plate 108. Specifically, in actual operation, the bottom plates 108 of the two plate bodies 103 are aligned with each other, the side plates 109 of the two plate bodies 103 are aligned with each other, and the mounting plates 110 of the two plate bodies 103 are aligned with each other. The two mounting plates 110 of the two plate bodies 103 are connected by a welded connection. The welded connection can improve the connection strength of the two plate bodies 103 and also improve the sealing of the heat spreader 100.

[0054] Furthermore, in this embodiment, the mounting plate 110 has an inner side and an outer side that are arranged opposite to each other, the inner side being the side close to the inner cavity 102, and the outer side being the side away from the inner cavity 102. A welding edge is also formed on the mounting plate 110, and the welding edge is located between the inner side and the outer side. The welded connection is configured to be formed by welding the two mounting plates 110 at the welding edge of the mounting plate 110. It should be noted that the welding edge does not actually exist. The welding edge refers to a position that the welding gun will be aimed at for welding during the welding process (this position is the welding edge). In this embodiment, during welding, the welding gun will be aimed at the welding edge and welding will be performed from the welding edge. The welded connection refers to the part where the two mounting plates are connected after welding is completed.

[0055] More specifically, the shortest distance between the welding edge and the end of the mounting plate 110 away from the side plate 109 is L1, 5mm≤L1≤15mm. It should be noted that when L1 is less than 5mm, during the welding process, the welding gun deviates to the outer edge, the welding area of ​​the two plates 103 is small, and the connection strength of the two plates 103 is insufficient. During use, the two plates 103 are easily disconnected, causing leakage of the working fluid in the inner cavity 102. When L1 is greater than 15mm, the welding gun deviates to the inner edge, and the inner cavity 102 is often provided with a reinforcing structure for support. When the welding gun is positioned close to the inner edge, during the welding process, the welding energy will affect the reinforcing structure in the inner cavity 102, causing the reinforcing structure to deform, thereby affecting the overall structural strength of the heat spreader 100. In this embodiment, L1 can be 5mm, 5.5mm, 6mm, 6.2mm, 6.8mm, 7mm, 7.7mm, 7.9mm, 8mm, 8.5mm, 8.6mm, 8.7mm, 9mm, 10mm, 11.2mm, 12mm, 12.5mm, 13mm, 14mm, 15mm or other unlisted data.

[0056] In this embodiment, the two plate bodies 103 are respectively a first plate body 104 and a second plate body 105. The first plate body 104 includes a first bottom plate and a first side plate, and the second plate body 105 includes a second bottom plate and a second side plate. The first bottom plate and the first side plate enclose a first groove, and the second bottom plate and the second side plate enclose a second groove. The first groove and the second groove are connected to form an inner cavity 102. It should be noted that the heat spreader 100 also includes a reinforcing structure. The reinforcing structure is provided on one of the plate bodies 103 and is located in the inner cavity 102. The reinforcing structure can support the plate body 101 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 reinforcing structure is provided in the inner cavity 102, does not occupy additional space, and will not affect the overall size of the battery.

[0057] Specifically, in this embodiment, the first and second grooves are formed by stamping. Specifically, a plate is placed on a stamping die, and the punch is aligned with the areas to be stamped. After stamping, the base plate 108, side plates 109, and mounting plate 110 are formed on the plate. Stamping saves material, eliminates gaps between the base plate 108, side plates 109, and mounting plate 110, and provides improved sealing.

[0058] In some embodiments, the heat spreader 100 further includes a plurality of wicks 112 and a wire mesh 113, wherein the plurality of wicks 112 are located in the inner cavity 102, the plurality of wicks 112 are located in one of the plate bodies 103, the plurality of wicks 112 are extended along the length direction of the plate body 101, and the plurality of wicks 112 are spaced apart in the inner cavity 102 along the width direction of the plate body 101, and the wire mesh 113 is arranged between the plurality of wicks 112 and the other plate body 103.

[0059] It should be noted that the specific materials of wick 112 and screen 113 are not limited and can be selected based on practical needs. In this embodiment, wick 112 is a stainless steel wick, and screen 113 is a stainless steel mesh. Stainless steel is highly corrosion-resistant and inherently strong, making it resistant to damage. In other embodiments, the wick is a copper wick and the screen is a copper mesh.

[0060] In some embodiments, see Figure 3 and Figure 4The overall thickness of the heat spreader 100 is H1, and the thickness of the plate body 103 is H2. H2:H1=(0.01~0.2):1. When H2 / H1 is less than 0.01, the thickness of the two plate bodies 103 is thinner, the structural strength is weaker, and it is easy to be damaged during use. When H2 / H1 is greater than 0.2, the thickness of the two plate bodies 103 is thicker, the thermal conductivity and heat transfer performance are reduced, and the occupied space is increased.

[0061] In some embodiments, see Figure 3 and Figure 4 The thickness of mesh 113 is H3, where H3:H1 = (0.01-0.7):1. When H3 / H1 is less than 0.01, mesh 113 is thin, reducing thermal conductivity. When H3 / H1 is greater than 0.7, mesh 113 is thicker, occupying more space in the inner cavity, reducing the amount of working fluid in the inner cavity and affecting the performance of vapor chamber 100.

[0062] In some embodiments, see Figure 3 and Figure 4 The thickness of the wick 112 is H4, where H4:H1 = (0.015-0.8):1. It should be noted that when H4 / H1 is less than 0.015, the wick 112 is thin, reducing its thermal conductivity and heat transfer performance. When H4 / H1 is greater than 0.8, the wick 112 is thicker, increasing the space occupied by the inner cavity, resulting in a decrease in the amount of working fluid in the inner cavity, affecting the performance of the vapor chamber 100.

[0063] Further, in some embodiments, the overall thickness of the heat sink 100 is 0.2 to 15 mm. Specifically, H1 can be 0.2 mm, 0.21 mm, 0.23 mm, 0.25 mm, 0.3 mm, 0.31 mm, 0.36 mm, 0.38 mm, 0.4 mm, 0.42 mm, 0.45 mm, 0.48 mm, 0.5 mm, 0.55 mm, 0.6 mm, 0.64 mm, 0.7 mm, 0.77 mm, 0.8 mm, 0.9 mm, 1 mm, 1.5 mm, 1.8 mm, 2 mm, 2.2 mm, 3 mm, 3.5 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12.5 mm, 13 mm, 14 mm, 14.5 mm, 15 mm or other unlisted data.

[0064] The thickness of the plate 103 is 0.02 to 3 mm. Specifically, H2 can be 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, 0.1 mm, 0.2 mm, 0.5 mm, 0.6 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2 mm, 2.2 mm, 2.4 mm, 2.5 mm, 2.8 mm, 3 mm or other unlisted data.

[0065] The thickness of the screen 113 is 0.011-0.3 mm. Specifically, H3 can be 0.011 mm, 0.012 mm, 0.013 mm, 0.015 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.15 mm, 0.16 mm, 0.18 mm, 0.2 mm or other unlisted data.

[0066] The thickness of the wick 112 is 0.08-0.5 mm. Specifically, H4 can be 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.15 mm, 0.16 mm, 0.18 mm, 0.2 mm, 0.22 mm, 0.25 mm, 0.28 mm, 0.3 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm, 0.38 mm, 0.4 mm, 0.41 mm, 0.42 mm, 0.45 mm, 0.48 mm, 0.49 mm, 0.5 mm or other unlisted data.

[0067] It should be noted that when the thickness of H1 decreases, the thicknesses of H2, H3, and H4 also decrease accordingly; and when the thickness of H1 increases, the thicknesses of H2, H3, and H4 also increase accordingly.

[0068] The plate body 101 includes a first portion, a second portion, and a third portion, wherein the second portion is connected between the first portion and the third portion. Figure 7 In some embodiments, the first portion and the third portion are located on the same plane, and the vapor chamber 100 is a "1"-shaped structure. Figure 8 In some other embodiments, the first portion and the third portion are located on different planes, and the vapor chamber 100 is an "L"-shaped structure. Figure 9 , two "L"-shaped vapor chambers 100 can be combined to form a "T"-shaped vapor chamber 100. Specifically, the selection can be made according to the actual situation.

[0069] In some embodiments, see Figure 1 A liquid inlet is also formed on the heat spreader 100 , which is connected to the inner cavity 102 . A liquid injection pipe is provided on the liquid inlet, which is connected to the outside and is used to input the working fluid into the inner cavity 102 .

[0070] The present invention also proposes a method for preparing the vapor chamber 100. The specific preparation steps are as follows:

[0071] As for material selection, the first plate 104, the second plate 105, the wire mesh 113, the liquid wick 112 and the liquid injection tube are all made of stainless steel.

[0072] The first plate 104 and the second plate 105 are placed on a punching machine, and a first groove is formed on the first plate 104 and a second groove is formed on the second plate 105 by punching.

[0073] The first plate 104, the second plate 105, the screen 113, the wick 112 and the injection tube are cleaned by ultrasonic cleaning.

[0074] The reinforcement structure is welded to the first plate 104 in sequence.

[0075] A film is deposited on the first plate 104 and the second plate 105 by vacuum degassing, so that the outer sides of the first plate 104 and the second plate 105 are wrapped with a protective layer 107 .

[0076] Place the first plate 104 on the operating table, install the absorbent core 112 on the first plate 104, then place the screen 113 on the absorbent core 112, place the second plate 105 on the first plate 104, and then seal the edges by laser welding to weld the first plate 104 and the second plate 105 together.

[0077] Then, the liquid injection tube is welded to the liquid inlet, and pure water is injected into the inner cavity 102 through the liquid injection tube. Subsequently, the inner cavity 102 is evacuated (the vacuum is 0.08 torr), and then laser welding is used to weld and seal it to obtain the heat spreader 100.

[0078] An aging test is performed on the vapor chamber 100 (test conditions: 85±5° C., 12-24 hours) to check whether its performance is attenuated.

[0079] An airtightness test (test conditions: helium pressure 0.16-0.6 MPa, 4 hours) was performed on the vapor chamber 100 to check whether its performance was attenuated.

[0080] It should be noted that the test methods and performance tests for the aging test and the airtight test may refer to conventional settings in the field and will not be described in detail here.

[0081] In some embodiments, the reinforcement structure includes a plurality of support columns, which are spaced apart on the first plate 104, with a distance between two adjacent support columns of 5 to 15 mm and a diameter of each support column of 1 to 5 mm. More specifically, the mesh size of the screen 113 is 200 to 250 meshes.

[0082] 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.

[0083] 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.

[0084] Generally, a battery case has six shell surfaces. The vapor chamber 100 can be applied to any one of the shell surfaces of the battery case, or it can be applied to multiple shell surfaces simultaneously. For example, the vapor chamber 100 can be applied to two adjacent shell surfaces of the battery case. Specifically, the vapor chamber 100 is L-shaped, with the first section of the vapor chamber 100 corresponding to one shell surface, and the second section of the vapor chamber 100 corresponding to the other shell surface, so that the vapor chamber 100 can serve as both shell surfaces of the battery case. The specific selection can be based on the size of the battery module.

[0085] In some other embodiments, the heat spreader 100 can also be used inside the battery. The battery includes a battery shell and a core pack group. The core pack group is installed in the battery shell. The core pack group includes at least one core pack. Specifically, the first section of the heat spreader 100 corresponds to one side of the core pack, and the second section of the heat spreader 100 corresponds to the other side of the core pack. Furthermore, in order to equalize the temperature of adjacent core packs, a heat spreader 100 can also be set between two adjacent core packs to achieve temperature balance on multiple sides, thereby transferring the temperature of the high-temperature part to the low-temperature part directly cooled by the cooling plate, thereby improving the cooling efficiency and avoiding thermal runaway.

[0086] In some other embodiments, the heat spreader 100 can also be used in a battery module, which includes multiple batteries. The first section of the heat spreader 100 corresponds to one side of the battery casing, and the second section of the heat spreader 100 corresponds to the other side of the battery casing. Furthermore, in order to equalize the temperature of adjacent batteries, a heat spreader 100 can also be set between two adjacent batteries to achieve temperature balance on multiple sides, thereby transferring the temperature of the high-temperature part to the low-temperature part for direct cooling by the cooling plate.

[0087] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used herein 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, according to the idea of ​​the present invention, there may 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: include: A plate body is formed with an inner cavity, and the plate body includes two plate bodies arranged opposite to each other along a first direction, at least one of the plate bodies includes a core material layer and a protective layer located on at least one side of the core material layer in the first direction, the thickness of the core material layer is B1, the thickness of the protective layer is A1, and A1:B1=(0.0005~0.2):

1.

2. The vapor chamber according to claim 1, wherein: The core material layer includes a stainless steel layer or a copper layer, and the protective layer includes any one of a nickel layer, a chromium layer, a zinc layer, an organic coating and a Teflon coating.

3. The vapor chamber according to claim 1, wherein: The protective layers formed by vacuum ion plating are provided on opposite sides of the core material layer.

4. The vapor chamber according to claim 1, wherein: Each of the plates comprises: base plate; a side panel disposed around the bottom panel; and A mounting plate, bent and connected to one end of the side plate away from the bottom plate and extending in a direction away from the bottom plate; Wherein, the two mounting plates of the two plate bodies are connected via a welding connection portion.

5. The vapor chamber according to claim 4, wherein: The welding connection portion is configured to be formed by welding the two mounting plates at the welding edges of the mounting plates; The shortest distance between the welding edge and the end of the mounting plate away from the side plate is L1, 5mm≤L1≤15mm.

6. The vapor chamber according to claim 4, wherein: The bottom plate and the side plate of each plate body form a groove, and the two grooves of the two plate bodies are connected to form the inner cavity, and the inner cavity is provided with a working fluid.

7. The vapor chamber according to claim 6, wherein: The plate body has the groove formed by stamping.

8. The vapor chamber according to any one of claims 1 to 7, wherein: It also includes a plurality of liquid-absorbing cores and a wire mesh. The plurality of liquid-absorbing cores are located in the inner cavity and are spaced apart on one of the plates. The wire mesh is located between the plurality of liquid-absorbing cores and the other plate.

9. The vapor chamber according to claim 8, wherein: The wick comprises any one of a wick and a copper wick; and / or The wire mesh includes any one of a stainless steel wire mesh and a copper wire mesh.

10. The vapor chamber according to claim 8, wherein: The overall thickness of the vapor chamber is H1, the thickness of the plate is H2, H2:H1=(0.01-0.2):1; and / or, The overall thickness of the vapor chamber is H1, the thickness of the wire mesh is H3, H3:H1=(0.01-0.7):1; and / or, The overall thickness of the heat spreader is H1, the thickness of the wick is H4, and H4:H1=(0.015-0.8):

1.

11. The vapor chamber according to any one of claims 1 to 7, wherein: The cross-sectional shape of the vapor chamber includes at least one of an "I" shape, an "L" shape, and a "T" shape.

12. A battery, characterized in that: The invention comprises a heat spreader as described in any one of claims 1 to 11.

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