Vapor chamber and battery

Abstract

The utility model provides a vapor chamber and a battery. The vapor chamber comprises a plate body and a first reinforcing structure. The plate body is provided with an inner cavity, the plate body comprises a first plate body and a second plate body which are oppositely arranged, the first plate body comprises a first sub-plate body, a bent plate and a second sub-plate body, and the bent plate is connected between the first sub-plate body and the second sub-plate body; the first reinforcing structure is connected to the first plate body and located in the inner cavity, the first reinforcing structure is provided with a bent section, and the bent section corresponds to the bent plate. The utility model aims to solve the technical problem that the bending part is easy to deform and even break because the pressure bearing capacity and the internal anti-expansion capacity of the bending part of the conventional vapor chamber are weak.

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 vapor chamber 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 for solving the heat dissipation problem of products and equipment. At present, vapor chambers 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 their external dimensions can be adjusted according to actual heat dissipation needs. In related technologies, the vapor chamber can be bent to fit the battery casing. The thickness of the vapor chamber is relatively thin, and during the bending process, the bend is prone to deformation or even breakage due to its weak pressure-bearing capacity and internal anti-expansion capacity. Utility Model Content

[0003] The embodiments of the present invention provide a vapor chamber and a battery, aiming to solve the technical problem that the existing vapor chamber has weak pressure bearing capacity and internal anti-expansion capacity at the bend, which leads to easy deformation or even fracture at the bend.

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

[0005] A plate body having an inner cavity, the plate body comprising a first plate body and a second plate body arranged opposite to each other, the first plate body comprising a first sub-plate body, a bent plate and a second sub-plate body, the bent plate being connected between the first sub-plate body and the second sub-plate body; and

[0006] The first reinforcing structure is connected to the first plate body and is located in the inner cavity. The first reinforcing structure has a curved section corresponding to the bent plate.

[0007] In one embodiment, the first reinforcing structure includes a first reinforcing plate, which is bent and has a first fluid channel on one side of the first reinforcing plate close to the first plate body, and a second fluid channel on one side of the first reinforcing plate close to the second plate body.

[0008] In one embodiment, the first reinforcement structure is provided separately from the plate body; and / or,

[0009] The first reinforcing plate is integrally formed.

[0010] In one embodiment, the first reinforcing plate includes at least one of a concave portion and a convex portion.

[0011] In one embodiment, the first reinforcement structure further includes a first section and a second section, the bent section is connected between the first section and the second section, the first section corresponds to the first sub-plate body, and the second section corresponds to the second sub-plate body.

[0012] In one embodiment, in the extension direction of the first sub-plate body, the size of the first reinforcement structure in the bending section is L1, the size of the first reinforcement structure in the first section is L2, and the size of the first reinforcement structure in the second section is L3, wherein L1: (L1+L2+L3)=(0.1~0.3):1.

[0013] In one embodiment, the first reinforcement structure includes a plurality of reinforcement rib groups and a reinforcement base plate, and the plurality of reinforcement rib groups are arranged on the reinforcement base plate at intervals along the width direction of the first sub-plate body, and each of the reinforcement rib groups includes a plurality of first reinforcement ribs, and the plurality of first reinforcement ribs are arranged at intervals along the width direction of the first sub-plate body. In the width direction of the first sub-plate body, the size of the reinforcement base plate is L4, and the size of the first reinforcement rib is L5, wherein L5:L4=(0.005~0.05):1.

[0014] In one embodiment, the first reinforcement structure includes a plurality of reinforcement rib groups, each of the reinforcement rib groups includes a plurality of first reinforcement ribs, the plurality of first reinforcement ribs are arranged at intervals along the width direction of the first sub-plate body, each of the first reinforcement ribs includes two first sub-reinforcement ribs and a plurality of second sub-reinforcement ribs, the two first sub-reinforcement ribs are respectively located in the first section and the second section, and the plurality of second sub-reinforcement ribs are arranged between the two first sub-reinforcement ribs and located in the curved section.

[0015] In one embodiment, the number of the second sub-reinforcing ribs in each of the first reinforcing ribs is n1, and the number of the first reinforcing ribs in each of the reinforcing rib groups is n2, where n1=n2.

[0016] In one embodiment, a second reinforcing structure is further included, which is arranged on the first sub-plate body and the second sub-plate body, and the second reinforcing structure is located in the inner cavity. The second reinforcing structure includes a plurality of reinforcing sub-ribs, and the density of the plurality of the reinforcing sub-ribs on the plate body is V1, and the density of the plurality of the second sub-reinforcing ribs on the plate body is V2, wherein V1:V2=(2~6):1.

[0017] In one embodiment, in the length direction of the first sub-plate body, the size of the first reinforcing structure in the bending section is L1, the size of the first reinforcing structure in the first section is L2, the size of the first reinforcing structure in the second section is L3, and the size of each of the second sub-reinforcement ribs is L6, wherein L6: (L1+L2+L3)=(0.03~0.2):1.

[0018] In one embodiment, the first reinforcement structure is integrally formed with the plate body.

[0019] In one embodiment, the bending angle of the bending plate is α, and the bending angle of the bending section is β, wherein 90°≤α≤95°, 90°≤β≤95°, and α=β.

[0020] In one embodiment, the plate body comprises a stainless steel plate body; and / or,

[0021] The first reinforcement structure includes a first stainless steel reinforcement structure.

[0022] In a second aspect, the present invention further provides a battery comprising the above-mentioned heat spreader.

[0023] Beneficial effects of the embodiments of the present utility model:

[0024] The vapor chamber provided by the present invention includes a chamber body, the chamber body forming an inner cavity, and a first reinforcement structure disposed within the inner cavity. The first reinforcement structure is capable of supporting the chamber body and strengthening the structural strength of the chamber body, thereby improving the chamber's pressure-bearing capacity and anti-expansion capabilities, enhancing the chamber's structural strength, and preventing the chamber from breaking during bending, thereby increasing the chamber's service life. Furthermore, the first reinforcement structure is disposed within the inner cavity, thus not occupying additional space. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] Figure 1 This is a structural diagram of an embodiment of a vapor chamber provided by the present invention;

[0027] Figure 2 yes Figure 1 A schematic structural diagram of the first plate;

[0028] Figure 3yes Figure 1 A schematic structural diagram of the second plate;

[0029] Figure 4 yes Figure 1 A structural schematic diagram of an embodiment of the first reinforcement structure;

[0030] Figure 5 yes Figure 4 A is an enlarged schematic diagram;

[0031] Figure 6 yes Figure 5 The main view;

[0032] Figure 7 yes Figure 6 A magnified schematic diagram of B in the middle;

[0033] Figure 8 yes Figure 5 Side view of

[0034] Figure 9 yes Figure 1 A schematic diagram of the partial structure of another embodiment of the first reinforcement structure.

[0035] Explanation of Figure Numbers

[0036] Label name Label name 100 Vapor Chamber 112 Strengthen the bottom plate 101 Board body 113 Reinforcement group 103 First plate 114 First reinforcement 104 Second plate 115 First son reinforcement 105 The first sub-board 116 Second reinforcement 106 Second sub-board 117 support column 107 bent plate 118 Wicking core installation channel 108 First reinforcement structure 119 wick 109 Paragraph 1 120 Silkscreen 110 curved section 121 Liquid inlet 111 Second paragraph 122 Second reinforcement structure 123 First reinforcement plate 124 First fluid channel 125 Second fluid channel 126 The third sub-board 127 Bending sub-plate 128 Fourth sub-board DETAILED DESCRIPTION

[0037] 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.

[0038] In related technologies, the heat spreader can be bent and used as the outer shell of the battery. The thickness of the heat spreader is relatively thin, and during the bending process, the bending part is prone to deformation or even breakage due to its weak pressure bearing capacity and internal anti-expansion capacity.

[0039] Example 1

[0040] The utility model proposes a heat sink. Figures 1 to 8This 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 structural strength and strong pressure bearing capacity, and will not affect the overall size of the battery module. The heat spreader will be described in detail in conjunction with the main drawings below.

[0041] See also Figure 1 、 Figure 2 and Figure 3 The vapor chamber 100 includes a plate body 101 and a first reinforcement structure 108. The plate body 101 has an inner cavity and includes a first plate body 103 and a second plate body 104 disposed opposite each other. The first plate body 103 includes a first sub-plate body 105, a bent plate 107, and a second sub-plate body 106. The bent plate 107 is connected between the first sub-plate body 105 and the second sub-plate body 106. The first reinforcement structure 108 is provided on the first plate body 103 and is located within the inner cavity. The first reinforcement structure 108 has a curved section 110, which corresponds to the bent plate 107.

[0042] The vapor chamber 100 provided by the present invention has a simple structure, low manufacturing cost, and efficient heat diffusion capabilities. The vapor chamber 100 includes a plate body 101, which defines an inner cavity. A first reinforcing structure 108 is disposed within the inner cavity. The first reinforcing structure 108 supports the plate body 101 and strengthens the structural strength of the plate body 101, thereby improving the pressure-bearing capacity and anti-expansion capacity of the vapor chamber 100, enhancing the structural strength of the vapor chamber 100, preventing the vapor chamber 100 from breaking during bending, and increasing the service life of the vapor chamber 100. Furthermore, the first reinforcing structure 108 is disposed within the inner cavity, thus not occupying additional space.

[0043] In some embodiments, the cross-section of the curved section 110 is arc-shaped, which can disperse the force exerted on the vapor chamber 100 and improve the life of the vapor chamber 100 .

[0044] It should be noted that the compressive strength of the vapor chamber 100 is greater than or equal to 2.5 MPa. During use, the battery generates heat and expands. If the compressive strength of the vapor chamber 100 is less than 2.5 MPa, the vapor chamber 100 may be affected by the expansion force and may bend, deform, or even break.

[0045] See also Figure 4 The first reinforcement structure 108 also includes a first section 109 and a second section 111. The curved section 110 is connected between the first section 109 and the second section 111. The first section 109 corresponds to the first sub-plate body 105, and the second section 111 corresponds to the second sub-plate body 106. This arrangement increases the contact area between the first reinforcement structure 108 and the first plate body 103, thereby increasing the connection strength between the two.

[0046] In some embodiments, see Figure 3 The second plate body 104 includes a third sub-plate body 126, a bent sub-plate body 127, and a fourth sub-plate body 128. The bent sub-plate body 127 is connected between the third sub-plate body 126 and the fourth sub-plate body 128. The third sub-plate body 126 corresponds to the first sub-plate body 105, the fourth sub-plate body 128 corresponds to the second sub-plate body 106, and the bent sub-plate body 127 corresponds to the bent plate 107.

[0047] For ease of processing, the first plate 103 and the second plate 104 are both initially flat plates, and the connection method of the first plate 103 and the second plate 104 is not limited. In some embodiments, the first plate 103 and the second plate 104 are first welded, and then the welded first plate 103 and the second plate 104 are bent. This arrangement facilitates the welding operation and reduces the difficulty of welding. In another embodiment, the first plate 103 and the second plate 104 are first bent so that the third sub-plate 126 corresponds to the first sub-plate 105, the fourth sub-plate 128 corresponds to the second sub-plate 106, and the bent sub-plate 127 corresponds to the bent plate 107. Then, the first plate 103 and the second plate 104 are welded together. This arrangement can improve the heat generation performance at the bent plate 107 and the bent sub-plate 127, avoid the loss of heat transfer performance at the bent plate 107 and the bent sub-plate 127, and improve the overall performance of the heat spreader 100.

[0048] In some embodiments, see Figure 1 The first plate 103 is the lower shell plate, and the second plate 104 is the 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 an inner cavity. It should be noted that the specific position of the first reinforcement structure 108 is not limited, and it only needs to be located in the inner cavity. In the above embodiment, the first reinforcement structure 108 is provided on the first plate 103. Of course, the first reinforcement structure 108 can also be provided on the second plate 104. It can be selected according to actual conditions. Since the first plate 103 is the lower shell plate, the first reinforcement structure 108 is provided on the first plate 103, which makes it more convenient to weld the first plate 103 and the second plate 104.

[0049] In some embodiments, a working fluid is provided in the inner cavity for heat exchange. It should be noted that the type of working fluid in the above embodiments is not limited and can be selected based on actual application conditions. For example, the working fluid can be lubricating oil, water, cooling air, alcohol compounds, etc.

[0050] In some embodiments, see Figure 8In the extension direction of the first sub-plate 105, the dimension of the first reinforcing structure 108 within the curved section 110 is L1 (i.e., the length of the arc of the curved section 110), the dimension of the first reinforcing structure 108 within the first section 109 is L2 (i.e., the length of the first sub-reinforcing rib 115 located within the first section 109), and the dimension of the first reinforcing structure 108 within the second section 111 is L3 (i.e., the length of the first sub-reinforcing rib 115 located within the second section 111), wherein L1:(L1+L2+L3)=(0.1-0.3):1. It should be noted that when the ratio of L1 to (L1+L2+L3) is less than 0.1, the area of ​​the curved section 110 is too small, the bending difficulty increases, the welding difficulty of the first plate 103 and the second plate 104 increases, the processing becomes difficult, and the processing time increases. When the ratio of L1 to (L1+L2+L3) is greater than 0.3, the area of ​​the curved section 110 increases, and the wasted space increases.

[0051] See 4 and Figure 5 The first reinforcement structure 108 includes a reinforcement base plate 112 and a plurality of reinforcement rib groups 113. The reinforcement base plate 112 extends along the width direction of the first sub-plate body 105 and is disposed within the first section 109, the curved section 110, and the second section 111. The plurality of reinforcement rib groups 113 are spaced apart on the reinforcement base plate 112 along the width direction of the first sub-plate body 105 and are disposed within the first section 109, the curved section 110, and the second section 111. In this embodiment, the reinforcing base plate 112 and the plurality of reinforcing rib groups 113 are integrally formed. The provision of the reinforcing base plate 112 facilitates the welding of the first reinforcing structure 108 to the first plate body 103. During the welding process, the reinforcing base plate 112 can be welded to the first plate body 103, thereby reducing the number of welding steps (when the reinforcing base plate 112 is not provided, the plurality of reinforcing rib groups 113 need to be welded to the first plate body 103 respectively, which increases the welding difficulty and the number of welding steps). Another function of the reinforcing base plate 112 is to increase the structural strength of the first plate body 103 so that the first plate body 103 will not break during the bending process. The function of the plurality of reinforcing rib groups 113 is to further increase the structural strength of the first plate body 103. At the same time, the purpose of providing the plurality of reinforcing rib groups 113 is to form a cavity between two adjacent reinforcing rib groups 113. During the bending process, the cavity can absorb a portion of the bending force, thereby avoiding the concentration of the bending force, which would cause the heat spreader 100 to deform or even break.

[0052] In some embodiments, see Figure 5Each reinforcing rib group 113 includes a plurality of first reinforcing ribs 114, and the plurality of first reinforcing ribs 114 extend along the length direction of the first sub-plate body 105, and the plurality of first reinforcing ribs 114 are spaced apart along the width direction of the first sub-plate body 105. A first gap is formed between two adjacent reinforcing rib groups 113, and the first gap is configured to allow the working fluid to flow, so that the first section 109 and the second section 111 are connected.

[0053] Further, in this embodiment, please refer to Figure 6 and Figure 7 In the width direction of the first sub-plate 105, the size of the reinforcing base plate 112 is L4, and the size of the first reinforcing rib 114 is L5, where L5:L4 = (0.005-0.05):1. When the ratio of L5 to L4 is less than 0.005, the size of the first reinforcing rib 114 is too small, resulting in insufficient strength of the vapor chamber 100, and the vapor chamber 100 is easily damaged during use. When the ratio of L5 to L4 is greater than 0.05, the size of the first reinforcing rib 114 is too large, the volume occupied increases, the first gap decreases, the first section 109 and the second section 111 cannot communicate, and the heat dissipation capacity or thermal conductivity of the vapor chamber 100 is reduced.

[0054] In some embodiments, the size of the first reinforcing rib 114 is 0.1 mm to 0.3 mm. Specifically, L4 can be 0.1 mm, 0.12 mm, 0.13 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, 0.21 mm, 0.24 mm, 0.25 mm, 0.28 mm, 0.29 mm, 0.3 mm, or other unspecified values.

[0055] In some embodiments, the width of the first gap is 0.8mm to 3mm. It should be noted that when the width of the first gap is less than 0.8mm, the size of the first gap is too small and is prone to clogging, resulting in the first section 109 and the second section 111 being unable to communicate. When the size of the first gap is greater than 3mm, the strength of the heat spreader 100 will be insufficient, and it will be prone to deformation or even breakage. Specifically, the size of the first gap can be 0.8mm, 0.85mm, 0.9mm, 0.92mm, 0.95mm, 0.98mm, 1mm, 1.1mm, 1.4mm, 1.5mm, 1.8mm, 2mm, 2.2mm, 2.5mm, 2.7mm, 3mm or other unlisted values.

[0056] The connection method between the first reinforcement structure 108 and the first plate 103 is not limited. In some embodiments, the first reinforcement structure 108 and the first plate 103 are bent separately and then connected together. In another embodiment, the first reinforcement structure 108 and the first plate 103 are first connected together and then bent simultaneously.

[0057] In order to avoid stress concentration during the bending process, which may cause the first plate 103 or the second plate 104 to deform or even break. Figure 8 Each first reinforcing rib 114 includes two first sub-reinforcing ribs 115 and a plurality of second sub-reinforcing ribs 116. The two first sub-reinforcing ribs 115 are respectively located in the first section 109 and the second section 111. The plurality of second sub-reinforcing ribs 116 are arranged between the two first sub-reinforcing ribs 115 and are located in the bending section 110. Specifically, since the plurality of second sub-reinforcing ribs 116 are arranged in the bending section 110, the orientation of each second sub-reinforcing rib 116 is different. During the bending process, each sub-reinforcing rib 115 diffuses the stress in a different direction, thereby avoiding stress concentration and preventing the heat spreader 100 from deforming or breaking. At the same time, the heat spreader 100 is also provided with a wire mesh 120 and a wick 119. The plurality of second sub-reinforcing ribs 116 diffuse the stress in different directions, which can avoid squeezing the wire mesh 120 or the wick 119, causing wrinkles in the wick 119 or the wire mesh 120 and blocking the inner cavity.

[0058] In some embodiments, the heat spreader also includes a second reinforcement structure 122, which is arranged on the first sub-plate body 105 and the second sub-plate body 106. The second reinforcement structure 122 is used to improve the strength of the first sub-plate body 105 and the second sub-plate body 106. The second reinforcement structure 122 is located in the inner cavity, and the second reinforcement structure 122 includes multiple reinforcement sub-ribs.

[0059] Furthermore, the density of the plurality of reinforcing sub-ribs on the plate body 101 is V1, the density of the plurality of second sub-reinforcing sub-ribs 116 on the plate body 101 is V2, and the density of the plurality of second sub-reinforcing sub-ribs 116 on the plate body is V2, wherein V1:V2 = (2-6):1. It should be noted that when the ratio of V1 to V2 is less than 2, the number of reinforcing sub-ribs is small, the pressure-bearing capacity and internal anti-expansion capacity of the first sub-plate body 105 and the second sub-plate body 106 are weak, and the vapor chamber is easily deformed. When the ratio of V1 to V2 is greater than 6, the density of the plurality of reinforcing sub-ribs is too dense, resulting in a reduction in the space in the internal cavity, preventing the working fluid from flowing smoothly and easily causing blockage.

[0060] In some embodiments, see Figure 4, the number of the second sub-reinforcement ribs 116 of each first reinforcement rib 114 is n1, and the number of the first reinforcement ribs 114 of each reinforcement rib group 113 is n2, wherein n1=n2. It should be noted that during the bending process, the bending section 110 is generally bent. During the bending process, the bending section 110 will receive a bending force, and the area near the bending section 110 will also be affected by the bending force (that is, the area of ​​the first sub-plate 105 corresponding to the first section 109 will be affected by the bending force, and the area of ​​the second sub-plate 106 corresponding to the second section 111 will also be affected by the bending force). In this embodiment, the second sub-reinforcement rib 116 is used to enhance the structural strength of the bending plate 107, and the first sub-reinforcement rib 115 is used to increase the strength of the first sub-plate 105 and the second sub-plate 106. Regarding the structural strength of the two sub-plates 106, since the first reinforcing rib 114 includes two second sub-reinforcing ribs 116, the two second sub-reinforcing ribs 116 correspond to the first section 109 and the second section 111 respectively. Therefore, in each reinforcing rib group 113, the number of second sub-reinforcing ribs located in the first section is also n2, and the number of second sub-reinforcing ribs located in the second section is also n2, where n1=n2. The purpose of such a setting is to ensure that the structural strength of the first section 109, the curved section 110 and the second section 111 are the same, so that they are subjected to uniform force and local deformation is avoided.

[0061] In some embodiments, along the length direction of the first sub-plate 105, the size of the first reinforcing structure 108 within the curved section 110 is L1, the size of the first reinforcing structure 108 within the first section 109 is L2, the size of the first reinforcing structure 108 within the second section 111 is L3, and the size of the second sub-reinforcing rib 116 is L6, where L6: (L1+L2+L3) = (0.03-0.2): 1. It should be noted that when the ratio of L6 to (L1+L2+L3) is less than 0.03, the size of the second sub-reinforcing rib 116 is small, and during the bending process, the second sub-reinforcing rib 116 itself is easily squeezed and deformed, thereby squeezing other parts (such as the screen 120 or the wick 119), causing the other parts to bend and deform. When the ratio of L6 to (L1+L2+L3) is greater than 0.2, the size of the second sub-reinforcement rib 116 is too large, and a larger bending force is required to bend the first reinforcement structure 108 during the bending process, causing other parts to be affected and deformed or even broken.

[0062] Furthermore, in some embodiments, the size of L6 is 0.05-0.1 mm. Specifically, L6 can be 0.05 mm, 0.055 mm, 0.06 mm, 0.065 mm, 0.07 mm, 0.075 mm, 0.08 mm, 0.085 mm, 0.09 mm, 0.095 mm, 0.1 mm, or other unspecified values.

[0063] In some embodiments, the vapor chamber 100 further includes a second reinforcement structure 122, which includes a plurality of support columns 117. The plurality of first support columns 117 are located in the inner cavity, with one end of the plurality of support columns 117 connected to the first plate 103, and the other end of the plurality of support columns 117 connected to the second plate 104. The plurality of support columns 117 are used to support the first plate 103 and the second plate 104. It should be noted that the arrangement of the plurality of support columns 117 is not limited. In one embodiment, the plurality of first support columns 117 are regularly arranged. In other implementations, the plurality of first support columns 117 are randomly arranged.

[0064] Furthermore, in this embodiment, to prevent the vapor chamber 100 from bending and deforming, a reinforcing base plate 112 and a group of reinforcing ribs 113 are connected between the first plate 103 and the second plate 104. Furthermore, the reinforcing base plate 112 is connected to the bent plate 107, and the group of reinforcing ribs 113 is connected to the bent sub-plate 127. The reinforcing base plate 112 and the group of reinforcing ribs 113 support the bent plate 107 and the bent sub-plate 127, thereby improving the structural strength of the bent section 110.

[0065] In some embodiments, see Figure 1 The vapor chamber 100 further includes a plurality of wicks 119 extending along the length of the plate body 101 and spaced apart within the inner cavity along the width of the plate body 101. Specifically, a wick mounting channel 118 is formed between two adjacent rib groups 113. The wick mounting channel 118 extends along the length of the plate body 101 and is configured to receive the wicks 119. The wicks 119 absorb the working fluid and diffuse it into the inner cavity, allowing the fluid to fill the inner cavity and improve heat dissipation.

[0066] In some embodiments, the width of the wick mounting channel 118 is 14-20 mm. More specifically, the width of the wick mounting channel 118 can be 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, or other values ​​not specified.

[0067] In some embodiments, please refer to Figure 1 The heat sink 100 further includes a wire mesh 120 , which is disposed in the inner cavity and above the plurality of wicks 119 .

[0068] In some embodiments, see Figure 2The bending angle of the bending plate 107 is α, 90°≤α≤95°. When α is less than 90°, the space occupied by the bending plate 107 increases. When α is greater than 95°, the space between the two walls of the bending plate 107 cannot be utilized, resulting in low space utilization. Specifically, α can be 90°, 91°, 92°, 93°, 94°, 95°, or other unspecified values. As a preferred embodiment, α is 90°.

[0069] In some embodiments, see Figure 4 , the bending angle of the curved section is β, where 90°≤β≤95°. When β is less than 90°, the space occupied by the curved section 110 increases. When β is greater than 95°, the angle between the first section 109 and the second section 111 is too large, the space between the curved sections 110 cannot be utilized, and the space utilization rate is low. Specifically, β can be 90°, 91°, 92°, 93°, 94°, 95°, or other unspecified values. As a preferred embodiment, β is 90°.

[0070] In some embodiments, see Figure 3 The bending angle of the bent sub-plate is θ, where 90°≤θ≤95°. When θ is less than 90°, the space occupied by the bent sub-plate 127 increases. When θ is greater than 95°, the space between the two walls of the bent sub-plate 127 cannot be utilized, resulting in low space utilization. Specifically, θ can be 90°, 91°, 92°, 93°, 94°, 95°, or other unspecified values. As a preferred embodiment, θ is 90°.

[0071] In this embodiment, α=β=θ. This configuration allows the first reinforcing structure 108 to fit more closely with the first plate 103 and the second plate 104 , avoiding gaps therebetween and improving the structural strength of the vapor chamber 100 .

[0072] In some embodiments, see Figure 1 A liquid inlet 121 is also formed on the heat spreader 100. The liquid inlet 121 is connected to the inner cavity and is used to input the working fluid into the inner cavity.

[0073] In one embodiment, the plate body 101 comprises a stainless steel plate body, and the first reinforcement structure 108 comprises a first stainless steel reinforcement structure. Specifically, the plate body 101 is made of stainless steel, i.e., the first plate body 103 and the second plate body 104 are also made of stainless steel. Furthermore, the first reinforcement structure 108 is also made of stainless steel. Stainless steel is a material with low reactivity and generally does not react with other substances, resulting in good corrosion resistance. Furthermore, stainless steel has a strong structural strength and is not prone to deformation, thereby extending the service life of the vapor chamber 100. In this embodiment, the stainless steel is preferably 304 stainless steel.

[0074] Of course, in some other embodiments, in order to improve the corrosion resistance of the plate body 101, a protective layer is often provided on the outside of the plate body 101. The protective layer is wrapped around the outside of the plate body 101, so that the plate body 101 is isolated from the outside world, thereby preventing the plate body 101 from being corroded and improving the service life of the plate body 101. More specifically, the protective layer includes any one of a nickel layer, a chromium layer and a zinc layer. The nickel layer, the chromium layer and the zinc layer have poor activity and basically do not react with other substances. The protective layer is wrapped around the outside of the plate body 101 and can protect the plate body 101, forming a dense passivation film on the outer surface of the plate body 101, which effectively prevents the plate body 101 from reacting with other substances, thereby extending the service life of the heat spreader 100.

[0075] Likewise, in some embodiments, a protective layer may be provided on the outer side of the first reinforcement structure 108 . The specific configuration method may refer to the configuration method of the plate body, and will not be described in detail here.

[0076] The present invention also provides a battery including a vapor chamber 100. The specific structure of the vapor chamber 100 is similar to the above embodiments. Since the present battery adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0077] 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.

[0078] In some embodiments, the battery housing has six shell surfaces. The vapor chamber 100 can be applied to any one of the shell surfaces of the battery housing, 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 housing. Specifically, the first section 109 of the vapor chamber 100 corresponds to one shell surface, and the second section 111 of the vapor chamber 100 corresponds to another shell surface, so that the vapor chamber 100 can serve as both shell surfaces of the battery housing. The specific selection can be based on the size of the battery module.

[0079] 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 109 of the heat spreader 100 corresponds to one side of the core pack, and the second section 111 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.

[0080] In some other embodiments, the heat spreader 100 can also be used in a battery module, which includes multiple batteries. The first section 109 of the heat spreader 100 corresponds to one side of the battery casing, and the second section 111 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.

[0081] Example 2

[0082] See also Figure 1 、 Figure 2 and Figure 3 The vapor chamber 100 includes a plate body 101 and a first reinforcement structure 108. The plate body 101 has an inner cavity and includes a first plate body 103 and a second plate body 104 disposed opposite each other. The first plate body 103 includes a first sub-plate body 105, a bent plate 107, and a second sub-plate body 106. The bent plate 107 is connected between the first sub-plate body 105 and the second sub-plate body 106. The first reinforcement structure 108 is provided on the first plate body 103 and is located within the inner cavity. The first reinforcement structure 108 has a curved section 110, which corresponds to the bent plate 107.

[0083] The vapor chamber 100 provided by the present invention has a simple structure, low manufacturing cost, and efficient heat diffusion capabilities. The vapor chamber 100 includes a plate body 101, which defines an inner cavity. A first reinforcing structure 108 is disposed within the inner cavity. The first reinforcing structure 108 supports the plate body 101 and strengthens the structural strength of the plate body 101, thereby improving the pressure-bearing capacity and anti-expansion capacity of the vapor chamber 100, enhancing the structural strength of the vapor chamber 100, preventing the vapor chamber 100 from breaking during bending, and increasing the service life of the vapor chamber 100. Furthermore, the first reinforcing structure 108 is disposed within the inner cavity, thus not occupying additional space.

[0084] In some embodiments, the first reinforcing plate 123 includes a concave portion. In other embodiments, the first reinforcing plate 123 includes a convex portion. In yet another embodiment, the first reinforcing plate 123 includes a concave portion and a convex portion.

[0085] In this example, see Figure 9 The first reinforcing structure 108 includes a convex portion and a concave portion. The first reinforcing structure 108 includes a first reinforcing plate 123. The first reinforcing plate 123 is arranged in a concave and convex manner. Figure 8 Taking the first reinforcing plate 123 in FIG as an example, the portion near the first plate 103 is a convex portion, and the portion near the second plate 104 is a concave portion. The concave portion and the first plate 103 form a first fluid channel 124, and the convex portion and the second plate 104 form a second fluid channel 125. The first fluid channel 124 and the second fluid channel 125 are separated. In this embodiment, by configuring the first reinforcing plate 123 with a concave and convex configuration, space is rationally utilized, the space occupied by the first reinforcing structure 108 is reduced, and cooling efficiency is improved. More specifically, conventional reinforcing structures often include multiple reinforcing ribs within the inner cavity. These multiple reinforcing ribs are spaced apart, resulting in increased space occupied by the reinforcing ribs and making it impossible for the working fluid to pass through the locations where the reinforcing ribs are located. In this embodiment, by configuring the first reinforcing structure 108 with a concave and convex configuration, flow channels are formed between the first reinforcing plate 123 and both the first and second plates 103 and 104. This not only improves the structural strength of the vapor chamber, but also conserves inner cavity space. The working fluid can pass through the first and second fluid channels 124 and 125, thereby improving cooling efficiency.

[0086] Furthermore, in some embodiments, the first reinforcement structure 108 is provided separately from the plate body 101, and the first reinforcement structure 108 is stamped and formed integrally. Specifically, in actual operation, the first reinforcement structure 108 is first stamped and formed, and then the convex portion of the first reinforcement structure 108 is welded to the first plate body 103, and the concave portion of the first reinforcement structure 108 is welded to the second plate body 104, thereby fixing the first reinforcement structure 108 to the plate body 101.

[0087] In one embodiment, the first reinforcement structure 108 may also be integrally formed by aluminum extrusion. The specific operation steps of the aluminum extrusion integrally formed may refer to conventional settings in the art and will not be described in detail here.

[0088] The first reinforcement structure 108 further includes a plurality of reinforcement rib groups 113 . The arrangement of the plurality of reinforcement rib groups 113 may be referred to in Example 1 and will not be described in detail here.

[0089] The vapor chamber 100 further includes a second reinforcement structure 122 . The configuration of the second reinforcement structure 122 may be referred to in Example 1 and will not be described in detail here.

[0090] Example 3

[0091] The present invention proposes a method for preparing a vapor chamber 100, comprising the following steps:

[0092] S1, bending the first plate 103 and the second plate 104;

[0093] Materials are selected, and the first plate body 103, the second plate body 104, the wire mesh 120, the liquid absorbent core 119 and the liquid injection tube are all made of stainless steel. The first plate body 103 and the second plate body 104 are then placed on a stamping machine. Through stamping, a first groove is formed on the first plate body 103, and a second groove is formed on the second plate body 104. The first plate body 103 and the second plate body 104 are bent by a bending machine. The bending size can be determined according to specific process requirements. Subsequently, the bent first plate body 103, the bent second plate body 104, the wire mesh 120, the liquid absorbent core 119 and the liquid injection tube are ultrasonically cleaned.

[0094] S2, stacking the first plate 103, the wick 119, the screen 120 and the second plate 104 from bottom to top;

[0095] Vacuum ion plating is used to coat the first and second plates 103, 104 with a protective layer. The first reinforcement structure 108 is then welded to the first plate 103. The first plate 103 is placed on a workbench, and the wick 119 is mounted on the first plate 103. The screen 120 is then placed on the wick 119, and the second plate 104 is placed on the first plate 103.

[0096] S3. After the step of bending the first plate 103 and the second plate 104, the first plate 103 and the second plate 104 are welded to obtain a vapor chamber.

[0097] The edges are sealed by laser welding, and the first plate 103 and the second plate 104 are welded together. (It should be noted that in this step, the first plate 103 and the second plate 104 are welded together after being bent).

[0098] Then, the liquid injection tube is welded to the liquid inlet 121 , and pure water is injected into the inner cavity through the liquid injection tube. The inner cavity is then evacuated (the vacuum is 0.08 torr), and then laser welding is used to seal the cavity to obtain the heat spreader 100 .

[0099] An aging test is performed on the vapor chamber 100 (test conditions: 85±5° C., 12-24 hours) to detect whether its performance is attenuated.

[0100] An airtightness test is performed on the vapor chamber 100 (test conditions: helium pressure 0.16-0.6 MPa, 4 hours) to check whether its performance is attenuated.

[0101] 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.

[0102] 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: include: A plate body having an inner cavity, the plate body comprising a first plate body and a second plate body arranged opposite to each other, the first plate body comprising a first sub-plate body, a bent plate and a second sub-plate body, the bent plate being connected between the first sub-plate body and the second sub-plate body; and The first reinforcing structure is connected to the first plate body and is located in the inner cavity. The first reinforcing structure has a curved section corresponding to the bent plate.

2. The vapor chamber according to claim 1, wherein: The first reinforcing structure includes a first reinforcing plate, which is bent. A first fluid channel is provided on a side of the first reinforcing plate close to the first plate body, and a second fluid channel is provided on a side of the first reinforcing plate close to the second plate body.

3. The vapor chamber according to claim 2, wherein: The first reinforcement structure is provided separately from the plate body; and / or, The first reinforcing plate is integrally formed.

4. The vapor chamber according to claim 2, wherein: The first reinforcing plate includes at least one of a concave portion and a convex portion.

5. The vapor chamber according to claim 1, wherein: The first reinforcement structure further includes a first section and a second section, the bent section is connected between the first section and the second section, the first section corresponds to the first sub-plate body, and the second section corresponds to the second sub-plate body.

6. The vapor chamber according to claim 5, wherein: In the extension direction of the first sub-plate body, the size of the first reinforcing structure in the bending section is L1, the size of the first reinforcing structure in the first section is L2, and the size of the first reinforcing structure in the second section is L3, wherein L1: (L1+L2+L3)=(0.1~0.3):

1.

7. The vapor chamber according to claim 5, wherein: The first reinforcement structure includes a plurality of reinforcement rib groups and a reinforcement base plate. The plurality of reinforcement rib groups are arranged on the reinforcement base plate at intervals along the width direction of the first sub-plate body. Each of the reinforcement rib groups includes a plurality of first reinforcement ribs. The plurality of first reinforcement ribs are arranged at intervals along the width direction of the first sub-plate body. In the width direction of the first sub-plate body, the size of the reinforcement base plate is L4, and the size of the first reinforcement rib is L5, wherein L5:L4=(0.005~0.05):

1.

8. The vapor chamber according to claim 5, wherein: The first reinforcement structure includes multiple reinforcement rib groups, each of the reinforcement rib groups includes multiple first reinforcement ribs, and the multiple first reinforcement ribs are arranged at intervals along the width direction of the first sub-plate body. Each first reinforcement rib includes two first sub-reinforcement ribs and multiple second sub-reinforcement ribs. The two first sub-reinforcement ribs are respectively located in the first section and the second section, and the multiple second sub-reinforcement ribs are arranged between the two first sub-reinforcement ribs and are located in the curved section.

9. The vapor chamber according to claim 8, wherein: The number of the second sub-reinforcement ribs of each first reinforcing rib is n1, and the number of the first reinforcing ribs of each reinforcing rib group is n2, wherein n1=n2.

10. The vapor chamber according to claim 8, wherein: It also includes a second reinforcement structure, which is arranged on the first sub-plate body and the second sub-plate body, and the second reinforcement structure is located in the inner cavity. The second reinforcement structure includes a plurality of reinforcing sub-ribs, and the density of the plurality of reinforcing sub-ribs on the plate body is V1, and the density of the plurality of second sub-reinforcing ribs on the plate body is V2, wherein V1:V2=(2~6):

1.

11. The vapor chamber according to claim 8, wherein: In the length direction of the first sub-plate body, the size of the first reinforcing structure in the bending section is L1, the size of the first reinforcing structure in the first section is L2, the size of the first reinforcing structure in the second section is L3, and the size of each of the second sub-reinforcement ribs is L6, wherein L6: (L1+L2+L3)=(0.03~0.2):

1.

12. The vapor chamber according to any one of claims 5 to 11, wherein: The first reinforcement structure is integrally formed with the plate body.

13. The vapor chamber according to any one of claims 1 to 11, wherein: The bending angle of the bending plate is α, and the bending angle of the bending section is β, wherein 90°≤α≤95°, 90°≤β≤95°, and α=β.

14. The vapor chamber according to any one of claims 1 to 11, wherein: The plate body comprises a stainless steel plate body; and / or, The first reinforcement structure includes a first stainless steel reinforcement structure.

15. A battery, characterized in that: The method comprises the heat diffusion plate according to any one of claims 1 to 14.

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