Vapor chamber, battery and battery module

Abstract

Provided in the present application are a vapor chamber, a battery and a battery module. The vapor chamber comprises a plate body and a first reinforcing structure. The plate body comprises a first plate and a second plate arranged opposite each other; the first plate comprises a first sub-plate, a bent plate and a second sub-plate, the bent plate being connected between the first sub-plate and the second sub-plate; the first reinforcing structure is connected to the first plate and located in an inner cavity; and the first reinforcing structure has a bent section, the bent section corresponding to the bent plate.

Description

Vapor chamber, battery and battery module

[0001] The present application claims priority to Chinese Patent Application No. 202421845734.5, 202411047801.3, 202421845773.5, filed on July 31, 2024, Chinese Patent Application No. 202422989763.5, filed on December 04, 2024, the contents of all of the above applications are hereby incorporated by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, in particular to a vapor chamber, a battery and a battery module. BACKGROUND

[0003] A vapor chamber is a phase change heat transfer element that uses the latent heat of phase change of working fluid to carry away heat, and is the most potential heat management method to solve the heat dissipation problem of products and equipment. At present, the vapor chamber is mainly applied to the heat dissipation of electronic equipment, and has excellent heat conduction performance, large heat transfer area and good uniform temperature performance; especially the thickness is ultra-thin, and the size can be adjusted according to the actual heat dissipation requirement. SUMMARY

[0004] In the related art, the vapor chamber can be bent to fit the shell of the battery, and the thickness of the vapor chamber is relatively thin. In the bending process, the bending part is prone to deformation or even breakage due to weak pressure bearing capacity and internal anti-expansion capacity.

[0005] The present application provides a vapor chamber. The vapor chamber comprises:

[0006] a plate body provided with an inner cavity, the plate body comprising a first plate body and a second plate body arranged oppositely, the first plate body comprising a first sub-plate body, a bending plate and a second sub-plate body, the bending plate being connected between the first sub-plate body and the second sub-plate body; and

[0007] a first reinforcing structure connected to the first plate body and located in the inner cavity, the first reinforcing structure having a bending section corresponding to the bending plate.

[0008] The present application also provides a battery. The battery comprises the vapor chamber.

[0009] The present application also provides a battery module. The battery module comprises the vapor chamber or the battery. ADVANTAGEOUS EFFECTS

[0010] The even heating plate provided in the application comprises a plate body, the plate body is formed with an inner cavity, the first reinforcing structure is arranged in the inner cavity, the first reinforcing structure can support the plate body, strengthen the structural strength of the plate body, thereby improving the pressure bearing capacity and anti-expansion capacity of the even heating plate, improving the structural strength of the even heating plate, avoiding the breakage of the even heating plate in the bending process, thereby improving the service life of the even heating plate. Meanwhile, the first reinforcing structure is arranged in the inner cavity, without occupying extra space. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 is a structural schematic diagram of some implementation modes of the even heating plate provided in the application;

[0012] Fig. 2 is a structural schematic diagram of the first plate body in Fig. 1;

[0013] Fig. 3 is a structural schematic diagram of the second plate body in Fig. 1;

[0014] Fig. 4 is a structural schematic diagram of some implementation modes of the first reinforcing structure in Fig. 1;

[0015] Fig. 5 is an enlarged schematic diagram of A in Fig. 4;

[0016] Fig. 6 is a front view of Fig. 5;

[0017] Fig. 7 is an enlarged schematic diagram of B in Fig. 6;

[0018] Fig. 8 is a side view of Fig. 5;

[0019] Fig. 9 is a partial structural schematic diagram of another implementation mode of the first reinforcing structure in Fig. 1;

[0020] Fig. 10 is a structural schematic diagram of the second plate body in Fig. 1;

[0021] Fig. 11 is a structural schematic diagram of the first reinforcing structure in Fig. 1;

[0022] Fig. 12 is a partial enlarged view of some implementation modes of the first reinforcing structure in Fig. 11;

[0023] Fig. 13 is a partial enlarged view of another implementation mode of the first reinforcing structure in Fig. 11;

[0024] Fig. 14 is a partial enlarged view of another implementation mode of the first reinforcing structure in Fig. 11;

[0025] Fig. 15 is a partial enlarged view of another implementation mode of the first reinforcing structure in Fig. 11;

[0026] Fig. 16 is a partial enlarged schematic diagram of C in Fig. 12.

[0027] Fig. 17 is a structural schematic diagram of the first plate body in Fig. 1;

[0028] Fig. 18 is an enlarged schematic view of CO in Fig. 17;

[0029] Fig. 19 is a structural schematic view of the second plate body in Fig. 1;

[0030] Fig. 20 is an enlarged schematic view of DO in Fig. 19;

[0031] Fig. 21 is a sectional view of the heat plate in Fig. 1;

[0032] Fig. 22 is an enlarged schematic view of E0 in Fig. 21;

[0033] Fig. 23 is an enlarged schematic view of F0 in Fig. 22;

[0034] Fig. 24 is a structural schematic view of another implementation of the heat plate provided by the present application;

[0035] Fig. 25 is a structural schematic view of still another implementation of the heat plate provided by the present application;

[0036] Fig. 26 is a structural schematic view of still another implementation of the heat plate provided by the present application.

[0037] Legend of reference signs:

[0038] 100, heat plate; 101, plate body; 103, first plate body; 104, second plate body; 105, first sub-plate body; 106, second sub-plate body; 107, bent plate; 108, first reinforcing structure; 109, first section; 110, curved section; 111, second section; 112, reinforcing bottom plate; 113, reinforcing rib group; 114, first reinforcing rib; 115, first sub-reinforcing rib; 116, second sub-reinforcing rib; 117, support column; 118, liquid absorbing core mounting passage; 119, liquid absorbing core; 120, wire mesh; 121, liquid inlet; 122, second reinforcing structure; 123, first reinforcing plate; 124, first fluid passage; 125, second fluid passage; 126, third sub-plate body; 127, bent sub-plate; 128, fourth sub-plate body; al, partition plate; a2, sub-passage; cl, first reinforcing plate; c2, first groove; c3, second groove; dl, first fluid passage; d2, second fluid passage; 111b, first accommodating groove; 112b, first connecting wall; 121b, second accommodating groove; 122b, second connecting wall; 13, inner cavity; 21, first groove; 211, first side edge; 212, second side edge; 22, protruding part; 23, accommodating cavity. Embodiment of the present application

[0039] Example one

[0040] In the related art, the heat plate can be bent to be used as the shell of the battery, the thickness of the heat plate is thin, and the bending part is prone to deformation or even breakage due to weak bearing capacity and internal anti-expansion capacity during the bending process.

[0041] Therefore, the heat plate provided in the embodiments has high structural strength and high bearing capacity, and does not affect the overall size of the battery module.

[0042] Please refer to FIGS. 1, 2 and 3, the heat plate 100 includes a plate body 101 and a first reinforcing structure 108. The plate body 101 is provided with an inner cavity, and the plate body 101 includes oppositely arranged first and second plate bodies 103 and 104. The first plate body 103 includes a first sub-plate body 105, a bending plate 107 and a second sub-plate body 106, and the bending plate 107 is connected between the first and second sub-plate bodies 105 and 106. The first reinforcing structure 108 is arranged on the first plate body 103 and located in the inner cavity, and the first reinforcing structure 108 has a curved section 110 corresponding to the bending plate 107.

[0043] The heat plate 100 provided in the present application has a simple structure and low manufacturing cost, and has high heat diffusion capacity. The heat plate 100 includes a plate body 101, the plate body 101 forms an inner cavity, and the first reinforcing structure 108 is arranged in the inner cavity. The first reinforcing structure 108 can support the plate body 101 and strengthen the structural strength of the plate body 101, thereby improving the bearing capacity and anti-expansion capacity of the heat plate 100, improving the structural strength of the heat plate 100, avoiding the breakage of the heat plate 100 during the bending process, and improving the service life of the heat plate 100. At the same time, the first reinforcing structure 108 is arranged in the inner cavity, without occupying additional space.

[0044] In some embodiments, the cross section of the curved section 110 is arc-shaped, which can disperse the force borne by the heat plate 100 and improve the service life of the heat plate 100.

[0045] It should be noted that the compressive strength of the heat plate 100 is greater than or equal to 2.5 MPa. In the use process, the battery will generate heat and expand. When the compressive strength of the heat plate 100 is less than 2.5 MPa, the heat plate 100 will be affected by the expansion force and be bent and deformed, or even broken.

[0046] Referring to FIG. 4, the first reinforcing structure 108 further comprises a first segment 109 and a second segment 111, and the curved segment 110 is connected between the first segment 109 and the second segment 111, the first segment 109 corresponds to the first sub-plate body 105, and the second segment 111 corresponds to the second sub-plate body 106. In this way, the contact area between the first reinforcing structure 108 and the first plate body 103 is increased, and the connection strength therebetween is improved.

[0047] In some embodiments, referring to FIG. 3, the second plate body 104 comprises a third sub-plate body 126, a bent sub-plate 127, and a fourth sub-plate body 128. The bent sub-plate 127 is connected between the third sub-plate body 126 and the fourth sub-plate body 128, wherein 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 127 corresponds to the bent plate 107.

[0048] In order to facilitate processing, the first plate body 103 and the second plate body 104 are initially flat plates, and the connection mode of the first plate body 103 and the second plate body 104 is not limited. In some embodiments, the first plate body 103 and the second plate body 104 are first welded, and then the first plate body 103 and the second plate body 104 welded together are subjected to bending treatment. In this way, the welding operation is facilitated, and the difficulty of welding is reduced. In another embodiment, the first plate body 103 and the second plate body 104 are first bent such that 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 127 corresponds to the bent plate 107. Then, the first plate body 103 and the second plate body 104 are welded together. In this way, the heat generation performance at the bent plate 107 and the bent sub-plate 127 can be improved, the heat transfer performance at the bent plate 107 and the bent sub-plate 127 can be avoided to be lost, and the overall performance of the vapor chamber 100 can be improved.

[0049] In some embodiments, referring to FIG. 1, the first plate body 103 is a lower shell plate, and the second plate body 104 is an upper shell plate. The upper shell plate and the lower shell plate are respectively formed with a first accommodating groove and a second accommodating groove, and the upper shell plate and the lower shell plate are welded and connected to communicate the first accommodating groove and the second accommodating groove to form an inner cavity. It should be noted that the specific position of the first reinforcing structure 108 is not limited, as long as it is located in the inner cavity. In the above embodiment, the first reinforcing structure 108 is arranged on the first plate body 103. Of course, the first reinforcing structure 108 can also be arranged on the second plate body 104, which can be selected according to the actual situation. Since the first plate body 103 is a lower shell plate, it is more convenient to weld and connect the first plate body 103 and the second plate body 104 by arranging the first reinforcing structure 108 on the first plate body 103.

[0050] The welding manner of the first plate body 103 and the second plate body 104 is not limited, and can be brazing, laser penetration welding, resistance welding, etc., which is selected according to the specific material of the first plate body 103 and the second plate body 104. For example, in some embodiments, when the material of the first plate body 103 and the second plate body 104 is stainless steel, the first plate body 103 and the second plate body 104 are welded by laser penetration welding. In some other embodiments, when the material of the first plate body 103 and the second plate body 104 is aluminum alloy or copper alloy, the first plate body 103 and the second plate body 104 are welded by brazing, and the welding material is solder paste or magnesium alloy welding wire. In some other embodiments, when the material of the first plate body 103 and the second plate body 104 is aluminum alloy, the first plate body 103 and the second plate body 104 are welded by resistance welding, and the welding material is aluminum alloy welding wire.

[0051] In some embodiments, the working fluid is arranged in the inner cavity, and the working fluid is used for heat exchange. It should be noted that the type of the working fluid in the above embodiments is not limited, and can be selected according to the actual application. For example, the working fluid can be lubricating oil, water, cold air, alcohol compound, etc.

[0052] In some embodiments, referring to FIG. 8, in the extension direction of the first sub-plate body 105, the size of the first reinforcing structure 108 in the bending section 110 is L1 (i.e., the length of the arc of the bending section 110), the size of the first reinforcing structure 108 in the first section 109 is L2 (i.e., the length of the first sub-reinforcing rib 115 in the first section 109), and the size of the first reinforcing structure 108 in the second section 111 is L3 (i.e., the length of the first sub-reinforcing rib 115 in 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 bending section 110 is too small, the bending difficulty increases, the welding difficulty of the first plate body 103 and the second plate body 104 increases, the processing is difficult, and the processing time sequence increases. When the ratio of L1 to (L1+L2+L3) is greater than 0.3, the area of the bending section 110 increases, and the wasted space increases.

[0053] Referring to FIG. 4 and FIG. 5, the first reinforcing structure 108 includes a reinforcing bottom plate 112 and a plurality of reinforcing rib groups 113. The reinforcing bottom plate 112 extends along the width direction of the first sub-plate body 105 and is arranged in the first section 109, the bending section 110 and the second section 111; the plurality of reinforcing rib groups 113 are arranged in the reinforcing bottom plate 112 along the width direction of the first sub-plate body 105 and are arranged in the first section 109, the bending section 110 and the second section 111. In the embodiment, the reinforcing bottom plate 112 and the plurality of reinforcing rib groups 113 are integrally formed. The reinforcing bottom plate 112 can facilitate the welding of the first reinforcing structure 108 on the first plate body 103. During the welding process, the reinforcing bottom plate 112 is welded on the first plate body 103, thereby reducing the welding steps (when the reinforcing bottom plate 112 is not arranged, the plurality of reinforcing rib groups 113 need to be welded on the first plate body 103 respectively, which increases the welding difficulty and the welding steps). Another function of the reinforcing bottom plate 112 is to increase the structural strength of the first plate body 103, so that the first plate body 103 will not be broken during the bending process. The plurality of reinforcing rib groups 113 are arranged to increase the structural strength of the first plate body 103. The plurality of reinforcing rib groups 113 are arranged to form cavities between adjacent two reinforcing rib groups 113. During the bending process, the cavities can absorb part of the bending force, thereby avoiding the concentration of the bending force and causing the vapor chamber 100 to be deformed or even broken.

[0054] In some embodiments, referring to FIG. 5, each reinforcing rib group 113 includes a plurality of first reinforcing ribs 114. The plurality of first reinforcing ribs 114 extend along the length direction of the first sub-plate body 105 and are arranged at intervals along the width direction of the first sub-plate body 105. First gaps are formed between adjacent two reinforcing rib groups 113. The first gaps are configured to allow the working fluid to flow, thereby connecting the first section 109 and the second section 111.

[0055] In the embodiment, referring to FIG. 6 and FIG. 7, in the width direction of the first sub-plate body 105, the size of the reinforcing bottom plate 112 is L4 and the size of the first reinforcing rib 114 is L5, wherein 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, which leads to insufficient strength of the vapor chamber 100. During use, the vapor chamber 100 is easily damaged. When the ratio of L5 to L4 is greater than 0.05, the size of the first reinforcing rib 114 is too large, which increases the occupied volume, reduces the first gap, and prevents the first section 109 and the second section 111 from being connected. The heat dissipation or heat conduction capacity of the vapor chamber 100 is reduced.

[0056] In some embodiments, the first reinforcing rib 114 has a size of 0.1mm-0.3mm. The L4 can be 0.1mm, 0.12mm, 0.13mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.24mm, 0.25mm, 0.28mm, 0.29mm, 0.3mm or other unlisted values.

[0057] In some embodiments, the first gap has a width of 0.8mm-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, which is prone to blockage, 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 vapor chamber 100 is not enough, which is prone to deformation or even breakage. 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.

[0058] The connection mode of the first reinforcing structure 108 and the first plate body 103 is not limited. In some embodiments, the first reinforcing structure 108 and the first plate body 103 are bent separately, and then connected together. In another embodiment, the first reinforcing structure 108 and the first plate body 103 are connected together, and then bent at the same time.

[0059] In order to avoid stress concentration during bending, resulting in abnormal deformation or even breakage of the first plate body 103 or the second plate body 104. In this embodiment, please refer to FIG. 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, and the plurality of second sub-reinforcing ribs 116 are arranged between the two first sub-reinforcing ribs 115 and located in the bending section 110. Since the plurality of second sub-reinforcing ribs 116 are arranged in the bending section 110, the direction of each second sub-reinforcing rib 116 is different, and during bending, each first sub-reinforcing rib 115 diffuses stress in different directions, thereby avoiding stress concentration and avoiding abnormal deformation or breakage of the vapor chamber 100. At the same time, the vapor chamber 100 also has a wire mesh 120 and a wick 119, and the plurality of second sub-reinforcing ribs 116 diffuse stress in different directions, which can avoid extrusion on the wire mesh 120 or the wick 119, resulting in wrinkles of the wick 119 or the wire mesh 120, and blockage of the inner cavity.

[0060] In some embodiments, the vapor chamber further comprises a second reinforcing structure 122 arranged on the first sub-plate body 105 and the second sub-plate body 106, the second reinforcing structure 122 being configured to improve the strength of the first sub-plate body 105 and the second sub-plate body 106, the second reinforcing structure 122 being located in the inner cavity, and the second reinforcing structure 122 comprising a plurality of reinforcing sub-ribs.

[0061] The density of the plurality of reinforcing sub-ribs on the plate body 101 is V1, the density of the plurality of second sub-ribs 116 on the plate body 101 is V2, and the density of the plurality of second 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, and 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, which leads to easy deformation of the vapor chamber; when the ratio of V1 to V2 is greater than 6, the density of the plurality of reinforcing sub-ribs is too dense, which leads to a reduction in the space of the inner cavity, and the working fluid cannot flow smoothly, which is prone to blockage.

[0062] In some embodiments, referring to FIG. 4, the number of second sub-ribs 116 of each first reinforcing rib 114 is n1, and the number of first reinforcing ribs 114 of each reinforcing rib group 113 is n2, wherein n1=n2. It should be noted that in the bending process, the bending section 110 is generally bent, and in 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 (i.e., the area of the first sub-plate body 105 corresponding to the first section 109 will be affected by the bending force, and the area of the second sub-plate body 106 corresponding to the second section 111 will also be affected by the bending force). In this embodiment, the second sub-ribs 116 are configured to enhance the structural strength of the bent plate 107, and the first sub-ribs 115 are configured to increase the structural strength of the first sub-plate body 105 and the second sub-plate body 106. Since the first reinforcing rib 114 comprises two second sub-ribs 116, the two second sub-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-ribs located in the first section is also n2, and the number of second sub-ribs located in the second section is also n2, wherein n1=n2. The purpose of such arrangement is to ensure that the structural strength of the first section 109, the bending section 110, and the second section 111 is the same, so that the stress is uniform, and local deformation is avoided.

[0063] In some embodiments, in the length direction of the first sub-plate body 105, the size of the first reinforcing structure 108 in the bending section 110 is L1, the size of the first reinforcing structure 108 in the first section 109 is L2, the size of the first reinforcing structure 108 in 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 in the bending process, the second sub-reinforcing rib 116 itself is easily extruded and deformed, thereby extruding and deforming other parts (such as the wire mesh 120 or the liquid absorption core 119). When the ratio of L6 to (L1+L2+L3) is greater than 0.2, the size of the second sub-reinforcing rib 116 is too large, and a larger bending force is required to bend the first reinforcing structure 108 during the bending process, which may cause deformation or even breakage of other parts.

[0064] In some embodiments, the size of L6 is 0.05~0.1mm. L6 can be 0.05mm, 0.055mm, 0.06mm, 0.065mm, 0.07mm, 0.075mm, 0.08mm, 0.085mm, 0.09mm, 0.095mm, 0.1mm or other unlisted values.

[0065] In some embodiments, the heating plate 100 further comprises a second reinforcing structure 122, the second reinforcing structure 122 comprises a plurality of support columns 117, the plurality of first support columns 117 are located in the inner cavity, one end of the plurality of support columns 117 is connected with the first plate body 103, the other end of the plurality of support columns 117 is connected with the second plate body 104, and the plurality of support columns 117 are used to support the first plate body 103 and the second plate body 104. It should be noted that the arrangement of the plurality of support columns 117 is not limited, and in an embodiment, the plurality of first support columns 117 are regularly arranged. In some other embodiments, the plurality of first support columns 117 are irregularly arranged.

[0066] In the present embodiment, in order to avoid bending deformation of the heating plate 100, the reinforcing bottom plate 112 and the reinforcing rib group 113 are connected between the first plate body 103 and the second plate body 104. The reinforcing bottom plate 112 is connected with the bending plate 107, the reinforcing rib group 113 is connected with the bending sub-plate 127, and the reinforcing bottom plate 112 and the reinforcing rib group 113 support the bending plate 107 and the bending sub-plate 127, thereby improving the structural strength of the bending section 110.

[0067] In some embodiments, referring to FIG. 1, the vapor chamber 100 further comprises a plurality of wicks 119, which are arranged along the length direction of the plate body 101 and are spaced apart in the width direction of the plate body 101 in the inner cavity. A wick mounting passage 118 is formed between two adjacent groups of reinforcing ribs 113, which is arranged along the length direction of the plate body 101 and is configured to mount the wicks 119. The wicks 119 can absorb the working fluid and diffuse the working fluid into the inner cavity, so that the working fluid can fill the inner cavity and improve the heat dissipation capacity.

[0068] In some embodiments, the width of the wick mounting passage 118 is 14-20 mm. The width of the wick mounting passage 118 can be 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, or other values not listed.

[0069] In some embodiments, referring to FIG. 1, the vapor chamber 100 further comprises a wire mesh 120, which is arranged in the inner cavity and above the plurality of wicks 119.

[0070] In some embodiments, referring to FIG. 2, the bending angle of the bending plate 107 is a, and 90°≤a≤95°. When a is less than 90°, the space occupied by the bending plate 107 increases. When a is greater than 95°, the space between the two walls of the bending plate 107 cannot be utilized, and the space utilization rate is low. a can be 90°, 91°, 92°, 93°, 94°, 95°, or other values not listed. As a preferred embodiment, a is 90°.

[0071] In some embodiments, referring to FIG. 4, the bending angle of the bending section is β, wherein 90°≤β≤95°. When β is less than 90°, the space occupied by the bending section 110 increases. When β is greater than 95°, the angle between the first section 109 and the second section 111 is too large, and the space between the bending sections 110 cannot be utilized, and the space utilization rate is low. β can be 90°, 91°, 92°, 93°, 94°, 95°, or other values not listed. As a preferred embodiment, β is 90°.

[0072] In some embodiments, referring to FIG. 3, the bending angle of the bending sub-plate is θ, and 90°≤θ≤95°. When θ is less than 90°, the space occupied by the bending sub-plate 127 increases. When θ is greater than 95°, the space between the two walls of the bending sub-plate 127 cannot be utilized, and the space utilization rate is low. θ can be 90°, 91°, 92°, 93°, 94°, 95°, or other values not listed. As a preferred embodiment, θ is 90°.

[0073] In the embodiment, α = β = θ, so that the first reinforcing structure 108 is more closely attached to the first plate body 103 and the second plate body 104, avoiding the gap between the three, and improving the structural strength of the heat spreader 100.

[0074] In some embodiments, referring to FIG. 1, the heat spreader 100 further has a liquid inlet 121 formed thereon, which is in communication with the inner cavity and used for inputting the working fluid into the inner cavity.

[0075] In an embodiment, the plate body 101 includes a stainless steel plate body, and the first reinforcing structure 108 includes a first stainless steel reinforcing structure. The material of the plate body 101 includes stainless steel, i.e., the materials of the first plate body 103 and the second plate body 104 are also stainless steel, and the material of the first reinforcing structure 108 is also stainless steel. The stainless steel material has poor activity and generally does not react with other substances, has good corrosion resistance, and has strong structural strength and is not easy to deform, thereby improving the service life of the heat spreader 100. In the embodiment, the type of the stainless steel material is preferably 304 stainless steel.

[0076] In other embodiments, the plate body 101 includes a copper alloy plate body, and the first reinforcing structure 108 includes a first copper alloy reinforcing structure. In other embodiments, the plate body 101 includes an aluminum alloy plate body, and the first reinforcing structure 108 includes a first aluminum alloy reinforcing structure. The materials of the plate body 101 and the first reinforcing structure 108 can be selected according to actual conditions.

[0077] Of course, in other embodiments, in order to improve the corrosion resistance of the plate body 101, a protective layer is often arranged on the outer side of the plate body 101, the protective layer is wrapped on the outer side of the plate body 101, so that the plate body 101 is isolated from the outside world, avoiding corrosion of the plate body 101, improving the service life of the plate body 101, 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 wrapped on the outer side of the plate body 101 can protect the plate body 101, form a dense passivation film on the outer surface of the plate body 101, effectively prevent the plate body 101 from reacting with other substances, thereby prolonging the service life of the heat spreader 100.

[0078] Similarly, in some embodiments, the outer side of the first reinforcing structure 108 can also be provided with a protective layer, and the specific arrangement manner can refer to the arrangement manner of the plate body, which will not be described here.

[0079] The application also provides a battery comprising the heat plate 100. The specific structure of the heat plate 100 is referred to the above embodiments. Since the battery adopts all the technical solutions of the above embodiments, it has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0080] In an embodiment, the battery further comprises a battery shell, which is composed of the heat plate 100, that is, the six sides of the battery shell can be composed of the heat plate 100. In this way, space can be saved and space utilization can be improved. It should be noted that the six heat plates 100 can be in communication with each other or not, which can be selected according to actual conditions.

[0081] In some embodiments, the battery shell has six shell surfaces, and the heat plate 100 can be applied to any one of the shell surfaces or simultaneously applied to multiple shell surfaces, for example, the heat plate 100 is applied to two adjacent shell surfaces of the battery shell. The first section 109 of the heat plate 100 corresponds to one shell surface, and the second section 111 of the heat plate 100 corresponds to another shell surface, so that the heat plate 100 can serve as two shell surfaces of the battery shell. The specific selection can be made according to the size of the battery module.

[0082] In other embodiments, the heat plate 100 can also be used in the battery. The battery comprises a battery shell and a core pack group, the core pack group is installed in the battery shell, and the core pack group comprises at least one core pack. The first section 109 of the heat plate 100 corresponds to one side surface of the core pack, and the second section 111 of the heat plate 100 corresponds to another side surface of the core pack. In order to uniformly heat the adjacent core packs, the heat plate 100 can also be arranged between the two adjacent core packs to achieve temperature balance of multiple side surfaces, so as to conduct the temperature of the high-temperature part to the low-temperature part directly cooled by the cooling plate, improve the cooling efficiency, and avoid thermal runaway.

[0083] In other embodiments, the heat plate 100 can also be used in the battery module. The battery module comprises a plurality of batteries. The first section 109 of the heat plate 100 corresponds to one side surface of the battery shell, and the second section 111 of the heat plate 100 corresponds to another side surface of the battery shell. In order to uniformly heat the adjacent batteries, the heat plate 100 can also be arranged between the two adjacent batteries to achieve temperature balance of multiple side surfaces, so as to conduct the temperature of the high-temperature part to the low-temperature part directly cooled by the cooling plate.

[0084] Embodiment two

[0085] In the related art, the heat plate can be bent to be used as the shell of the battery. The thickness of the heat plate is relatively thin, and the bending part is prone to deformation or even breakage due to weak pressure bearing capacity and internal anti-expansion capacity during the bending process.

[0086] In view of this, the present embodiment provides a vapor chamber 100, please refer to FIG. 1, FIG. 2 and FIG. 3, the vapor chamber 100 includes a plate body 101 and a first reinforcing structure 108. The plate body 101 is provided with an inner cavity, the plate body 101 includes a first plate body 103 and a second plate body 104 arranged oppositely, the first plate body 103 includes a first sub-plate body 105, a bending plate 107 and a second sub-plate body 106, the bending plate 107 is connected between the first sub-plate body 105 and the second sub-plate body 106. The first reinforcing structure 108 is arranged on the first plate body 103 and located in the inner cavity, the first reinforcing structure 108 has a curved section 110, the curved section 110 corresponds to the bending plate 107.

[0087] The vapor chamber 100 provided by the present application has simple structure and low manufacturing cost, and has high heat diffusion capacity. The vapor chamber 100 includes a plate body 101, the plate body 101 forms an inner cavity, a first reinforcing structure 108 is arranged in the inner cavity, the first reinforcing structure 108 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 vapor chamber 100, improving the structural strength of the vapor chamber 100, avoiding the rupture of the vapor chamber 100 during the bending process, and improving the service life of the vapor chamber 100. At the same time, the first reinforcing structure 108 is arranged in the inner cavity, without occupying additional space.

[0088] In some embodiments, the first reinforcing plate 123 includes a recess. In other embodiments, the first reinforcing plate 123 includes a protrusion. In yet another embodiment, the first reinforcing plate 123 includes a recess and a protrusion.

[0089] In the embodiment, referring to FIG. 9, the first reinforcing structure 108 includes protrusions and recesses, and the first reinforcing structure 108 includes the first reinforcing plate 123, which is arranged in a protrusion and recess manner. For example, the first reinforcing plate 123 in FIG. 8 is arranged in a protrusion and recess manner, the protrusion is close to the first plate body 103, and the recess is close to the second plate body 104. The recess and the first plate body 103 surround the first fluid passage 124, the protrusion and the second plate body 104 surround the second fluid passage 125, and the first fluid passage 124 and the second fluid passage 125 are arranged in a spaced manner. In the embodiment, the first reinforcing plate 123 is arranged in a protrusion and recess manner, the space is reasonably utilized, the space occupied by the first reinforcing structure 108 is reduced, and the cooling efficiency is improved. In the conventional reinforcing structure, a plurality of reinforcing ribs are arranged in the inner cavity, the plurality of reinforcing ribs are arranged in a spaced manner, the space occupied by the reinforcing ribs is increased, and the position where the reinforcing ribs are located cannot be used for the working fluid to pass through. In the embodiment, the first reinforcing structure 108 is arranged in a protrusion and recess manner, the first reinforcing plate 123 and the first plate body 103 and the second plate body 104 form flow passages, the structural strength of the vapor chamber is improved, the space in the inner cavity is not wasted, the working fluid passes through the first fluid passage 124 and the second fluid passage 125, and the cooling efficiency is improved.

[0090] In some embodiments, the first reinforcing structure 108 is arranged separately from the plate body 101, and the first reinforcing structure 108 is integrally formed by stamping. In actual operation, the first reinforcing structure 108 is first formed by stamping, then the protrusion of the first reinforcing structure 108 is welded and connected with the first plate body 103, the recess of the first reinforcing structure 108 is welded and connected with the second plate body 104, and thus the first reinforcing structure 108 is fixed on the plate body 101.

[0091] In an embodiment, the first reinforcing structure 108 can also be integrally formed by aluminum extrusion. The specific operation steps of the aluminum extrusion integral forming can refer to the conventional arrangement in the art, which will not be described here.

[0092] The first reinforcing structure 108 further includes a plurality of reinforcing rib groups 113, and the arrangement manner of the plurality of reinforcing rib groups 113 can refer to Embodiment 1, which will not be described here.

[0093] The vapor chamber 100 further includes a second reinforcing structure 122, and the arrangement manner of the second reinforcing structure 122 can refer to Embodiment 1, which will not be described here.

[0094] Embodiment Three

[0095] In the related art, the vapor chamber can be bent to be used as a shell of a battery, the thickness of the vapor chamber is relatively thin, and the bending part is prone to deformation or even fracture due to weak bearing capacity and internal anti-expansion capacity during the bending process.

[0096] In view of this, the embodiment proposes a preparation method of the uniform heating plate 100, comprising the following steps:

[0097] S1, bending the first plate body 103 and the second plate body 104;

[0098] Select the material, the first plate body 103, the second plate body 104, the wire mesh 120, the liquid absorbing core 119 and the liquid injection pipe are made of stainless steel material, then place the first plate body 103 and the second plate body 104 on the punch machine, form the first groove on the first plate body 103 and the second groove on the second plate body 104 by punch forming, bend the first plate body 103 and the second plate body 104 by the bending machine, the bending size can be according to the specific process requirement, then ultrasonic clean the bent first plate body 103, the bent second plate body 104, the wire mesh 120, the liquid absorbing core 119 and the liquid injection pipe.

[0099] S2, stack the first plate body 103, the liquid absorbing core 119, the wire mesh 120 and the second plate body 104 from bottom to top;

[0100] Coat a layer of protective layer on the outer side of the first plate body 103 and the second plate body 104 by using vacuum ion plating. Then weld the first reinforcing structure 108 on the first plate body 103. Place the first plate body 103 on the operation table, install the liquid absorbing core 119 on the first plate body 103, then place the wire mesh 120 on the liquid absorbing core 119, and place the second plate body 104 on the first plate body 103.

[0101] S3, after the step of bending the first plate body 103 and the second plate body 104, weld the first plate body 103 and the second plate body 104 to obtain the uniform heating plate.

[0102] Seal the edge by laser welding, and weld the first plate body 103 and the second plate body 104 together. (It should be noted that in this step, the first plate body 103 and the second plate body 104 after bending are welded).

[0103] Then weld the liquid injection pipe on the liquid inlet 121, inject pure water into the inner cavity through the liquid injection pipe, then vacuumize the inner cavity (vacuum is 0.08 torr), then weld and seal by laser welding to obtain the uniform heating plate 100.

[0104] Perform aging test on the uniform heating plate 100 (test condition: 85±5℃, 12~24h), and detect whether the performance is attenuated.

[0105] Perform air tightness test on the uniform heating plate 100 (test condition: helium pressurization 0.16~0.6Mpa, 4h), and detect whether the performance is attenuated.

[0106] It should be noted that the test methods and performance detection of the aging test and the air tightness test can refer to the conventional settings in the art, which will not be described here.

[0107] Embodiment Four

[0108] In the related art, in order to increase the strength of the vapor chamber, reinforcing ribs are often arranged inside the vapor chamber for support. These reinforcing ribs have high rib density, small gaps, and occupy more space, resulting in a decrease in the internal space of the vapor chamber, a decrease in the capacity of the working fluid that can be accommodated, and a decrease in the performance of the vapor chamber.

[0109] In view of this, the present embodiment provides a vapor chamber 100. The vapor chamber 100 provided by the present embodiment has strong structural strength, strong pressure-bearing capacity, and excellent performance. The vapor chamber 100 will be described in detail below in combination with the main drawings.

[0110] Please refer to FIG. 1. The vapor chamber 100 includes a plate body 101 and a first reinforcing structure 108. The plate body 101 is provided with an inner cavity. The plate body 101 includes a first plate body 103 and a second plate body 104 arranged oppositely. The first reinforcing structure 108 is connected to the first plate body 103 and located in the inner cavity. A fluid passage is formed between the first reinforcing structure 108 and the first plate body 103 and / or the second plate body 104. The fluid passage is used for the working fluid in the inner cavity to flow.

[0111] The vapor chamber 100 provided by the present application includes a plate body 101. The plate body 101 forms an inner cavity. The first reinforcing structure 108 is arranged in the inner cavity. The first reinforcing structure 108 can support the plate body 101 and strengthen the structural strength of the plate body 101. Meanwhile, a fluid passage is formed between the first reinforcing structure 108 and the first plate body 103 and / or the second plate body 104. The fluid passage is used for the working fluid in the inner cavity to flow. In this way, the first reinforcing structure 108 can strengthen the structural strength of the plate body 101 without reducing the working fluid accommodated in the inner cavity, thereby ensuring that the performance of the vapor chamber 100 remains unchanged.

[0112] It should be noted that the compressive strength of the vapor chamber 100 is greater than or equal to 0.5 MPa. During use, the battery will generate heat and expand. When the compressive strength of the vapor chamber 100 is less than 0.5 MPa, the vapor chamber 100 will be affected by the expansion force and will be bent and deformed, or even broken.

[0113] The specific shape of the vapor chamber 100 is not limited. It can be a "1" type structure, a "L" type structure, or a "T" type structure (two "L" type vapor chambers 100 are combined). The actual situation can be selected as needed. In the present embodiment, in order to facilitate description, the "L" type vapor chamber 100 is taken as an example to describe the first reinforcing structure 108 in detail.

[0114] In the embodiment, referring to FIG. 2, FIG. 10 and FIG. 11, the first plate body 103 comprises a first sub-plate body 105, a bending plate 107 and a second sub-plate body 106, the bending plate 107 is connected between the first sub-plate body 105 and the second sub-plate body 106. The second plate body 104 comprises a third sub-plate body 126, a bending sub-plate 127 and a fourth sub-plate body 128. The bending sub-plate 127 is connected between the third sub-plate body 126 and the fourth sub-plate body 128, wherein 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 bending sub-plate 127 corresponds to the bending plate 107. The first reinforcing structure 108 comprises a first segment 109, a bending segment 110 and a second segment 111, the bending segment 110 is connected between the first segment 109 and the second segment 111, the first segment 109 corresponds to the first sub-plate body 105 and the third sub-plate body 126, and the second segment 111 corresponds to the second sub-plate body 106 and the fourth sub-plate body 128. In this way, the contact area of the first reinforcing structure 108 and the first plate body 103 is increased, and the connection strength therebetween is improved.

[0115] In order to facilitate processing, the first plate body 103 and the second plate body 104 are initially flat plates, and the connection mode of the first plate body 103 and the second plate body 104 is not limited. In some embodiments, the first plate body 103 and the second plate body 104 are first welded, and then the first plate body 103 and the second plate body 104 welded together are subjected to bending treatment. In this way, the welding operation is facilitated, and the difficulty of welding is reduced. In another embodiment, the first plate body 103 and the second plate body 104 are first bent so that 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 bending sub-plate 127 corresponds to the bending plate 107. Then, the first plate body 103 and the second plate body 104 are welded together. In this way, the heat generation performance at the bending plate 107 and the bending sub-plate 127 can be improved, the heat transfer performance at the bending plate 107 and the bending sub-plate 127 can be avoided, and the overall performance of the vapor chamber 100 can be improved.

[0116] In some embodiments, the cross section of the bending segment 110 is arc-shaped, which can disperse the force borne by the vapor chamber 100 and improve the service life of the vapor chamber 100.

[0117] In some embodiments, referring to FIG. 1, the first plate body 103 is a lower shell plate, and the second plate body 104 is an upper shell plate. The upper shell plate and the lower shell plate are respectively formed with a first accommodating groove and a second accommodating groove. The upper shell plate and the lower shell plate are welded to communicate the first accommodating groove and the second accommodating groove to form an inner cavity. It should be noted that the specific position of the first reinforcing structure 108 is not limited, as long as it is located in the inner cavity. In the above embodiment, the first reinforcing structure 108 is arranged on the first plate body 103. Of course, the first reinforcing structure 108 can also be arranged on the second plate body 104. According to the actual situation, the selection can be made. Since the first plate body 103 is a lower shell plate, it is more convenient to weld the first plate body 103 and the second plate body 104 by arranging the first reinforcing structure 108 on the first plate body 103.

[0118] In some embodiments, a working fluid is arranged in the inner cavity, and the working fluid is used for heat exchange. It should be noted that the type of the working fluid in the above embodiment is not limited, and the selection can be made according to the actual application. For example, the working fluid can be lubricating oil, water, cold air, alcohol compounds, etc.

[0119] In the present embodiment, referring to FIGS. 12 and 16, the first reinforcing structure 108 includes a first reinforcing plate c1, a second reinforcing plate c0, and a plurality of partition plates a1. The first reinforcing plate c1 and the second reinforcing plate c0 are arranged opposite to each other, and are connected to each other to enclose a total channel extending along the length direction of the first plate body 103. The total channel is used for the working fluid to flow. In order to increase the structural strength of the total channel, the plurality of partition plates a1 are connected between the first reinforcing plate c1 and the second reinforcing plate c0 to separate the total channel into a plurality of sub-channels a2 along the width direction of the first plate body 103. The plurality of sub-channels a2 are used for the working fluid to pass through. The fluid channel includes the plurality of sub-channels a2. In this way, the plurality of sub-channels a2 are used for the working fluid to pass through, and the plurality of partition plates a1 are used for support, thereby improving the structural strength of the vapor chamber 100.

[0120] In some embodiments, the first reinforcing plate c1 is provided with a plurality of reinforcing rib groups 113 corresponding to the part of the curved section 110. The plurality of reinforcing rib groups 113 are arranged at intervals along the width direction of the first plate body 103. The plurality of reinforcing rib groups 113 are used to increase the structural strength of the first plate body 103. At the same time, the plurality of reinforcing rib groups 113 are arranged to form cavities between adjacent two reinforcing rib groups 113. In the process of bending, the cavities can absorb part of the bending force, avoiding the concentration of the bending force, and causing the vapor chamber 100 to be deformed or even broken.

[0121] In some embodiments, each of the groups of reinforcing ribs 113 includes a plurality of first reinforcing ribs 114, which are arranged at intervals along the length direction of the first sub-plate body 105, and each of the first reinforcing ribs 114 has a different orientation. During the bending process, each of the first reinforcing ribs 114 diffuses the stress in a different direction, thereby avoiding stress concentration and preventing the vapor chamber 100 from deforming or breaking in an abnormal shape. A first gap is formed between two adjacent groups of reinforcing ribs 113, and the first gap is configured to allow the working fluid to flow, thereby reducing the space occupied by the first reinforcing structure 108, providing more space for the working fluid, and improving the performance of the vapor chamber 100.

[0122] In some embodiments, the width of the first gap is 0.8-3 mm. It should be noted that when the width of the first gap is less than 0.8 mm, the size of the first gap is too small, which is prone to blockage, resulting in that the first section 109 and the second section 111 cannot be connected. When the size of the first gap is greater than 3 mm, the strength of the vapor chamber 100 is not enough, which is prone to deformation or even breaking. The size of the first gap can be 0.8 mm, 0.85 mm, 0.9 mm, 0.92 mm, 0.95 mm, 0.98 mm, 1 mm, 1.1 mm, 1.4 mm, 1.5 mm, 1.8 mm, 2 mm, 2.2 mm, 2.5 mm, 2.7 mm, 3 mm, or other values not listed.

[0123] The connection mode of the first reinforcing structure 108 and the first plate body 103 is not limited. In some embodiments, the first reinforcing structure 108 and the first plate body 103 are bent separately, and then connected together. In another embodiment, the first reinforcing structure 108 and the first plate body 103 are connected together, and then bent at the same time.

[0124] In some embodiments, referring to FIG. 1, the vapor chamber 100 further includes a plurality of wicks 119, which are arranged along the length direction of the plate body 101 and are arranged at intervals in the width direction of the plate body 101 in the inner cavity. A wick mounting channel 118 is formed between two adjacent groups of reinforcing ribs 113, and the wick mounting channel 118 extends along the length direction of the plate body 101 and is configured to mount the wicks 119. The wicks 119 can absorb the working fluid and diffuse the working fluid into the inner cavity, so that the working fluid can fill the inner cavity and improve the heat dissipation capacity.

[0125] In some embodiments, the width of the wick mounting channel 118 is 14-20 mm. 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 listed.

[0126] In some embodiments, referring to FIG. 1, the heat plate 100 further comprises a wire mesh 120, which is arranged in the inner cavity and above the plurality of wick 119.

[0127] In some embodiments, referring to FIG. 1, the heat plate 100 further comprises a liquid inlet 121, which is in communication with the inner cavity and used for inputting working fluid into the inner cavity.

[0128] In an embodiment, the plate body 101 comprises a stainless steel plate body, and the first reinforcing structure 108 comprises a first stainless steel reinforcing structure. The material of the plate body 101 comprises stainless steel, i.e. the material of the first plate body 103 and the second plate body 104 also comprises stainless steel, and the material of the first reinforcing structure 108 also comprises stainless steel. The stainless steel material has poor activity and generally does not react with other substances. In general, the stainless steel material has good corrosion resistance, and has strong structural strength and is not easy to deform, which can improve the service life of the heat plate 100. In this embodiment, the type of the stainless steel material is preferably 304 stainless steel.

[0129] Of course, in other embodiments, in order to improve the corrosion resistance of the plate body 101, a protective layer is often arranged on the outer side of the plate body 101. The protective layer is wrapped on the outer side of the plate body 101 to isolate the plate body 101 from the outside world, avoid the plate body 101 from being corroded, and improve the service life of the plate body 101. The protective layer comprises 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 generally do not react with other substances. The protective layer wrapped on the outer side of the plate body 101 can protect the plate body 101, form a dense passivation film on the outer surface of the plate body 101, effectively prevent the plate body 101 from reacting with other substances, and thus prolong the service life of the heat plate 100.

[0130] Similarly, in some embodiments, the outer side of the first reinforcing structure 108 can also be provided with a protective layer, and the specific arrangement manner can refer to the arrangement manner of the plate body 101, which will not be described here.

[0131] The application also provides a battery comprising the heat plate 100. The specific structure of the heat plate 100 can refer to the above embodiments. Since the battery adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described here.

[0132] In an embodiment, the battery further comprises a battery shell, the battery shell is composed of the vapor chamber 100, that is, six sides of the battery shell can be composed of the vapor chamber 100, so that space can be saved and space utilization can be improved. It should be noted that the six vapor chambers 100 can be communicated with each other or not communicated with each other, and selection can be made according to actual conditions.

[0133] In some embodiments, the battery shell has six shell surfaces, and the vapor chamber 100 can be applied to any one of the shell surfaces in the battery shell or simultaneously applied to multiple shell surfaces, for example, the vapor chamber 100 is applied to two adjacent shell surfaces of the battery shell. 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 two shell surfaces of the battery shell. The selection can be made according to the size of the battery module.

[0134] In other embodiments, the vapor chamber 100 can also be used in the battery. The battery comprises a battery shell and a core pack group, the core pack group is installed in the battery shell, and the core pack group comprises at least one core pack. The first section 109 of the vapor chamber 100 corresponds to one side surface of the core pack, and the second section 111 of the vapor chamber 100 corresponds to another side surface of the core pack. In order to uniformly heat the adjacent core packs, the vapor chamber 100 can also be arranged between the two adjacent core packs to realize temperature balance of multiple side surfaces, so that the temperature of the high-temperature part is conducted to the low-temperature part directly cooled by the cooling plate, the cooling efficiency is improved, and thermal runaway is avoided.

[0135] In other embodiments, the vapor chamber 100 can also be used in the battery module. The battery module comprises a plurality of batteries. The first section 109 of the vapor chamber 100 corresponds to one side surface of the battery shell, and the second section 111 of the vapor chamber 100 corresponds to another side surface of the battery shell. In order to uniformly heat the adjacent batteries, the vapor chamber 100 can also be arranged between the two adjacent batteries to realize temperature balance of multiple side surfaces, so that the temperature of the high-temperature part is conducted to the low-temperature part directly cooled by the cooling plate.

[0136] Embodiment five

[0137] In the related art, in order to increase the strength of the vapor chamber, reinforcing ribs are arranged inside the vapor chamber for support. The reinforcing ribs have high rib density, small gaps, and occupy more space, which reduces the internal space of the vapor chamber, reduces the accommodated working fluid, and reduces the performance of the vapor chamber.

[0138] In view of this, the embodiment provides a vapor chamber 100. The vapor chamber 100 provided in the embodiment has strong structural strength, strong pressure-bearing capacity, and excellent performance itself. The vapor chamber 100 will be described in detail below in combination with the main drawings.

[0139] It should be noted that the difference between embodiment five and embodiment four is that the first reinforcing structure 108 is different, and the other structures are the same.

[0140] In the embodiment, referring to FIG. 13, the first reinforcing structure 108 includes a first reinforcing plate c1, and a plurality of first grooves c2 are formed on one side of the first reinforcing plate c1 close to the first plate body 103. In actual operation, the first reinforcing plate c1 is first placed on a punching machine, and the plurality of first grooves c2 are punched on the first reinforcing plate c1. The side on which the plurality of first grooves c2 are formed is connected with the first plate body 103, and the groove walls of the plurality of first grooves c2 surround the first channel with the first plate body 103. In this way, the groove walls of the plurality of first grooves c2 are used to support the vapor chamber 100, and the first channel is used to pass the working fluid. In this way, the structural strength of the vapor chamber 100 can be ensured, the first channel is reserved for the working fluid to pass through, and too much space of the inner cavity is not occupied, so that the performance of the vapor chamber 100 is not reduced.

[0141] In some embodiments, the first reinforcing structure 108 is integrally formed by punching. In actual operation, the first reinforcing structure 108 is first formed by punching, and then the side of the first reinforcing structure 108 on which the first grooves c2 are formed is welded and connected with the first plate body 103, and the other side is abutted with the second plate body 104 (in the same way, the other side can also be welded with the second plate body 104), so as to fix the first reinforcing structure 108 on the plate body 101.

[0142] In an embodiment, the first reinforcing structure 108 can also be integrally formed by aluminum extrusion. The specific operation steps of the aluminum extrusion integral forming can refer to the conventional settings in the art, and will not be repeated here.

[0143] The other structures of embodiment five can refer to the settings of embodiment four, and will not be repeated here.

[0144] Embodiment six

[0145] In the related art, in order to increase the strength of the vapor chamber, reinforcing ribs are often arranged inside the vapor chamber for support. The reinforcing ribs have high rib density, small gap, and occupy more space, which reduces the internal space of the vapor chamber, reduces the working fluid that can be accommodated, and reduces the performance of the vapor chamber.

[0146] In view of this, the present embodiment provides a vapor chamber 100. The vapor chamber 100 provided by the present embodiment has strong structural strength, strong pressure-bearing capacity, and excellent performance itself. The vapor chamber 100 will be described in detail below in combination with the main drawings.

[0147] It should be noted that the difference between embodiment six and embodiment four is that the first reinforcing structure 108 is different, and the other structures are the same.

[0148] In the embodiment, referring to FIG. 14, the first reinforcing structure 108 includes a first reinforcing plate c1, a plurality of second grooves c3 are formed on a side of the first reinforcing plate c1 away from the first plate body 103. In actual operation, the first reinforcing plate c1 is first placed on a punching machine, the plurality of second grooves c3 are punched on the first reinforcing plate c1, and the side on which the plurality of second grooves c3 are formed is connected with the first plate body 103. The groove walls of the plurality of second grooves c3 surround the second passage with the second plate body 104, and the second passage is used for passing working fluid. In this way, the groove walls of the plurality of second grooves c3 are used to support the vapor chamber 100, and the second passage is used for passing working fluid. In this way, the structural strength of the vapor chamber 100 can be ensured, the reserved second passage is used for passing working fluid, and too much space of the inner cavity is not occupied, so that the performance of the vapor chamber 100 is not reduced.

[0149] In some embodiments, the first reinforcing structure 108 is integrally formed by punching. In actual operation, the first reinforcing structure 108 is first formed by punching, and then the side of the first reinforcing structure 108 on which the second grooves c3 are formed is welded and connected with the second plate body 104, and the other side is abutted with the first plate body 103 (in the same way, the other side can also be welded with the first plate body 103), so as to fix the first reinforcing structure 108 on the plate body 101.

[0150] In an embodiment, the first reinforcing structure 108 can also be integrally formed by aluminum extrusion. The specific operation steps of aluminum extrusion integral forming can refer to the conventional settings in the art, and will not be repeated here.

[0151] The other structures of the sixth embodiment can refer to the settings of the fourth embodiment, and will not be repeated here.

[0152] Embodiment seven

[0153] In the related art, in order to increase the strength of the vapor chamber, reinforcing ribs are often arranged inside the vapor chamber for support. The reinforcing ribs have high rib density, small gap, and occupy more space, which reduces the internal space of the vapor chamber, reduces the working fluid that can be accommodated, and reduces the performance of the vapor chamber.

[0154] In view of this, the present embodiment provides a vapor chamber 100. The vapor chamber 100 provided by the present embodiment has strong structural strength, strong pressure-bearing capacity, and excellent performance itself. The vapor chamber 100 will be described in detail below in combination with the main drawings.

[0155] In the embodiment, referring to FIG. 15, the first reinforcing structure 108 includes convex and concave parts, and the first reinforcing structure 108 includes the first reinforcing plate c1 which is concave-convex arranged. Taking the first reinforcing plate c1 in FIG. 15 as an example, the part close to the first plate body 103 is a convex part, and the part close to the second plate body 104 is a concave part. The concave part and the first plate body 103 enclose the first fluid channel d1, and the convex part and the second plate body 104 enclose the second fluid channel d2. The first fluid channel d1 and the second fluid channel d2 are arranged separately. In the embodiment, the first reinforcing plate c1 is concave-convex arranged, the space is reasonably utilized, the space occupied by the first reinforcing structure 108 is reduced, and the cooling efficiency is improved.

[0156] In the embodiment, the convex part includes a third groove. The first reinforcing plate c1 is placed on a punch machine, the side close to the first plate body 103 is aligned with a punch, the third groove is punched on the first reinforcing plate c1 by the punch, and the groove wall of the third groove and the first plate body 103 enclose the first fluid channel d1. Similarly, the concave part includes a fourth groove. The side close to the second plate body 104 is aligned with the punch, the fourth groove is punched on the first reinforcing plate c1 by the punch, and the groove wall of the fourth groove and the second plate body 104 enclose the second fluid channel d2.

[0157] In some embodiments, the first reinforcing structure 108 is arranged separately from the plate body 101, and the first reinforcing structure 108 is integrally formed by punching. In actual operation, the first reinforcing structure 108 is first formed by punching, and then the convex part of the first reinforcing structure 108 is welded and connected with the first plate body 103, and the concave part of the first reinforcing structure 108 is welded and connected with the second plate body 104, so as to fix the first reinforcing structure 108 on the plate body 101.

[0158] In an embodiment, the first reinforcing structure 108 can also be integrally formed by aluminum extrusion. The specific operation steps of the aluminum extrusion integral forming can refer to the conventional arrangement in the art, which will not be repeated here.

[0159] The other structures of the seventh embodiment can refer to the arrangement of the fourth embodiment, which will not be repeated here.

[0160] Embodiment eight

[0161] In the related art, the vapor chamber includes an upper shell plate and a lower shell plate. The upper shell plate and the lower shell plate are connected by welding. In the welding process, the solder is easy to overflow and pollute the internal wick structure of the vapor chamber. The overflow of the solder causes the local thickness of the vapor chamber to increase and the heat conduction effect to decrease.

[0162] In view of this, the embodiment provides a vapor chamber 100. The vapor chamber 100 is simple in structure, can avoid solder penetration, avoid pollution of the internal structure of the vapor chamber 100, and improve the heat conduction efficiency of the vapor chamber 100. The vapor chamber 100 will be described in detail below in combination with the main drawings.

[0163] Please refer to FIG. 1, FIG. 17 and FIG. 19. The vapor chamber includes a plate body 101. The plate body 101 includes a first plate body and a second plate body 104 arranged oppositely. The first plate body 103 and the second plate body 104 enclose an inner cavity 13. The first plate body 103 and / or the second plate body 104 is provided with a first groove 21. The first groove 21 is arranged around the inner cavity 13. The first groove 21 is provided with solder for welding the first plate body 103 and the second plate body 104.

[0164] In the technical scheme of the present application, the first groove 21 is arranged on the first plate body 103 and / or the second plate body 104. The first groove 21 is provided with solder. When the first plate body 103 and the second plate body 104 are welded, the solder melts and fills in the first groove 21. This can avoid the solder overflowing and flowing to the inner cavity 13 to pollute other structures in the inner cavity 13. At the same time, the solder is arranged in the first groove 21. This can not only improve the connection strength of the first plate body 103 and the second plate body 104, but also ensure that the solder does not overflow in the welding process, so as to ensure that the thickness of the vapor chamber 100 is basically uniform, avoid the local thickness of the vapor chamber 100 increasing due to the overflow of the solder, and affect the heat conduction effect of the vapor chamber 100.

[0165] It should be noted that the specific position of the first groove 21 is not limited and can be selected according to actual conditions. In some embodiments, the first groove 21 is formed on the first plate body 103. In other embodiments, the first groove 21 is formed on the second plate body 104. In other embodiments, the first groove 21 is arranged on the first plate body 103 and the second plate body 104.

[0166] In some embodiments, please refer to FIG. 1. The first plate body 103 is a lower shell plate. The second plate body 104 is an upper shell plate. The upper shell plate and the lower shell plate are respectively provided with a first accommodating groove 111b and a second accommodating groove 121b. The upper shell plate and the lower shell plate are welded and connected to make the first accommodating groove 111b and the second accommodating groove 121b communicate to form the inner cavity 13. It should be noted that the vapor chamber 100 is also provided with a first reinforcing structure 108. The specific position of the first reinforcing structure 108 is not limited and only needs to be located in the inner cavity 13. In the above-mentioned embodiments, the first reinforcing structure 108 is arranged on the first plate body 103. Of course, the first reinforcing structure 108 can also be arranged on the second plate body 104. The selection can be made according to actual conditions. Since the first plate body 103 is a lower shell plate, it is more convenient to arrange the first reinforcing structure 108 on the first plate body 103 for welding and connecting the first plate body 103 and the second plate body 104.

[0167] In some embodiments, the working fluid is arranged in the inner cavity 13 for heat exchange. It should be noted that the type of working fluid in the above embodiments is not limited, and can be selected according to actual application. For example, the working fluid can be lubricating oil, water, cold air, alcohol compound, etc.

[0168] Referring to FIGS. 17, 18 and 19, the first plate body 103 is formed with a first accommodating groove 111b, and the edge of the first accommodating groove 111b is outwardly folded to form a first connecting wall 112b. The second plate body 104 is formed with a second accommodating groove 121b, and the edge of the second accommodating groove 121b is outwardly folded to form a second connecting wall 122b. The first connecting wall 112b corresponds to the second connecting wall 122b, and in the actual welding process, the first plate body 103 and the second plate body 104 are welded and connected by welding the first connecting wall 112b and the second connecting wall 122b. The first connecting wall 112b is provided with a first groove 21 on the side facing the second plate body 104, and the second plate body 104 covers the first groove 21. In this embodiment, the first groove 21 is used to accommodate solder, and the second connecting wall 122b serves as a "cover plate" to cover the first groove 21, thereby forming an accommodating cavity 23 between the first groove 21 and the second connecting wall 122b. During welding, the solder melts and fills the accommodating cavity 23. Since the second connecting wall 122b covers the first groove 21, it can prevent the solder from overflowing out of the first groove 21, thereby avoiding the solder from overflowing into the inner cavity 13 and polluting the inner cavity 13.

[0169] Referring to FIGS. 21, 22 and 23, the first groove 21 has a first side edge 211 close to the inner cavity 13 and a second side edge 212 away from the inner cavity 13. The vertical distance between the first side edge 211 and the second side edge 212 is D1, and the width of the first connecting wall 112b is D4, wherein 0.05≤D1 / D4≤0.25. It should be noted that the width of the first groove 21 should not be too wide or too small. When D1 / D4 is less than 0.05, the width of the first groove 21 is too narrow, and the volume of the first groove 21 is reduced. When the volume of the solder is unchanged, the solder will still overflow out of the first groove 21 and flow into the inner cavity 13 during welding, polluting the inner cavity 13. When the volume of the solder is correspondingly reduced, it will lead to a reduction in the connection strength of the first plate body 103 and the second plate body 104, which is prone to splitting during use. When D1 / D4 is greater than 0.25, the width of the first groove 21 is too large, which reduces the strength of the first connecting wall 112b, and the first connecting wall 112b is prone to breaking during welding.

[0170] It should be noted that the specific position of the first groove 21 is not limited, and can be set according to actual conditions. In the embodiment, the vertical distance from the first side edge 211 to the edge of the inner cavity 13 is D2, and the vertical distance from the second side edge 212 to the side of the first connecting wall 112b away from the inner cavity 13 is D3, and 0.9≤D2 / D3≤1.1. When D2 / D3 is less than 0.9, the first groove 21 is too close to the inner cavity 13, and the solder is also easy to penetrate into the inner cavity 13 during the welding process, thereby polluting the inner cavity 13. When D2 / D3 is greater than 1.1, the first groove 21 is too far away from the inner cavity 13, which can effectively avoid the penetration and pollution of the solder, but when the first groove 21 is too close to the edge of the first connecting wall 112b, the edge of the first connecting wall 112b is easy to crack due to heat during the welding process. The first groove 21 is located at the middle position of the first connecting wall 112b, that is, D2=D3, and such setting can also ensure the uniformity of the stress of the first connecting wall 112b during the welding process.

[0171] In some embodiments, referring to FIGS. 19 and 20, the edge of the second plate body 104 is formed with a second connecting wall 122b corresponding to the first connecting wall 112b, and the side of the second connecting wall 122b facing the first connecting wall 112b is provided with a protrusion 22 covering the first groove 21. In the actual installation process, the solder is first placed in the first groove 21, and then the second plate body 104 is covered on the first plate body 103, so that the protrusion 22 corresponds to the first groove 21, and the protrusion 22 can be clamped in the first groove 21 during the covering process. On the one hand, the protrusion 22 cooperates with the first groove 21 to pre-fix the first plate body 103 and the second plate body 104, which is convenient for the operator to operate; on the other hand, the protrusion 22 cooperates with the first groove 21 to fix the solder in the first groove 21, thereby avoiding the penetration of the solder, protecting the inner cavity 13, and avoiding the pollution of the inner cavity 13.

[0172] Referring to FIGS. 21 and 22, along the thickness direction of the first plate body 103, the height of the protrusion 22 is E1, and the depth of the first groove 21 is E2, and E1 is less than E2. In the embodiment, the height of the protrusion 22 is less than the depth of the first groove 21, and the purpose of such setting is to avoid the protrusion 22 extruding the solder when cooperating with the first groove 21, thereby causing the penetration of the solder and polluting the inner cavity 13. At the same time, since the height of the protrusion 22 is less than the depth of the first groove 21, the first groove 21 and the protrusion 22 form an accommodation cavity 23, and the solder is arranged in the accommodation cavity 23, and the accommodation cavity 23 is used for accommodating the solder, thereby avoiding the overflow of the solder and polluting the inner cavity 13.

[0173] In some embodiments, E2 = E1 + e1, e1 is the first coefficient, and 0.05 mm ≤ e1 ≤ 0.15 mm. It should be noted that e1 is the depth of the accommodating cavity 23. When e1 is less than 0.05, the height of the convex portion 22 is too high, resulting in the depth of the accommodating cavity 23 being too shallow. When the volume of the solder is unchanged, the solder will still overflow the first groove 21 and flow into the inner cavity 13 during welding, thereby contaminating the inner cavity 13. When the volume of the solder is correspondingly reduced, the connection strength of the first plate body 103 and the second plate body 104 will be reduced, and the first plate body 103 and the second plate body 104 will be easily separated during use. When e1 is greater than 0.15, the height of the convex portion 22 is too small, resulting in an increase in the volume of the accommodating cavity 23 and a reduction in the sealing effect of the accommodating cavity 23, and the solder is prone to overflow. In the present embodiment, e1 can be 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, or other data not listed.

[0174] Referring to FIGS. 21, 22, and 23, the thickness of the first connecting wall 112b is E3, and 0.06 ≤ E2 / E3 ≤ 0.7. It should be noted that when E2 / E3 is less than 0.06, the depth of the first groove 21 is too small, and the volume of the first groove 21 is reduced. When the volume of the solder is unchanged, the solder will still overflow the first groove 21 and flow into the inner cavity 13 during welding, thereby contaminating the inner cavity 13. When the volume of the solder is correspondingly reduced, the connection strength of the first plate body 103 and the second plate body 104 will be reduced, and the first plate body 103 and the second plate body 104 will be easily separated during use. When E2 / E3 is greater than 0.7, the depth of the first groove 21 is increased, and the structural strength of the first connecting wall 112b is reduced, and the first connecting wall 112b is prone to damage.

[0175] In some embodiments, the thickness of the second connecting wall 122b is E4, and 0.05 ≤ E1 / E4 ≤ 0.6. When E1 / E4 is less than 0.05, the height of the convex portion 22 is too small, resulting in an increase in the volume of the accommodating cavity 23 and a reduction in the sealing effect of the accommodating cavity 23, and the solder is prone to overflow. When E1 / E4 is greater than 0.6, the height of the convex portion 22 is too high, resulting in the depth of the accommodating cavity 23 being too shallow. When the volume of the solder is unchanged, the solder will still overflow the first groove 21 and flow into the inner cavity 13 during welding, thereby contaminating the inner cavity 13. When the volume of the solder is correspondingly reduced, the connection strength of the first plate body 103 and the second plate body 104 will be reduced, and the first plate body 103 and the second plate body 104 will be easily separated during use.

[0176] In some embodiments, the volume of the accommodating cavity 23 is V1, the volume of the solder is V2, and 0.65≤V2 / V1≤1. It should be noted that when V2 / V1 is less than 0.65, the capacity of the solder is too small, the welding strength of the first plate body 103 and the second plate body 104 is reduced, and false welding and other defects are prone to occur. When V2 / V1 is greater than 1, the capacity of the solder is too large, and penetration is prone to occur during welding, flowing into the inner cavity 13 and polluting the inner cavity 13.

[0177] Referring to FIGS. 21 and 22, the width of the first groove 21 is F1, the width of the convex part 22 is F2, F1=F2+e2, e2 is a second coefficient, and 0.03mm≤e2≤0.05mm. It should be noted that the purpose of such a setting is to facilitate the cover of the first plate body 103 and the second plate body 104, and the convex part 22 is gap-fitted with the first groove 21, which facilitates the operation of the operator. e2 can be 0.03mm, 0.04mm, 0.05mm or other data not listed.

[0178] In some embodiments, the heat plate 100 further comprises a plurality of liquid absorbing cores and a wire mesh 120, the plurality of liquid absorbing cores are located in the inner cavity 13, the plurality of liquid absorbing cores are arranged on the first plate body 103 and extend along the length direction of the plate body 101, and the plurality of liquid absorbing cores are arranged in the inner cavity 13 and are spaced apart along the width direction of the plate body 101, and the wire mesh 120 is arranged between the plurality of liquid absorbing cores and the second plate body 104.

[0179] It should be noted that the specific materials of the liquid absorbing cores and the wire mesh 120 are not limited and can be selected according to actual conditions. In this embodiment, the liquid absorbing cores are stainless steel liquid absorbing cores, and the wire mesh 120 is a stainless steel wire mesh 120. The stainless steel material has strong corrosion resistance and strong structural strength and is not easily damaged. In some other embodiments, the liquid absorbing cores are copper liquid absorbing cores, and the wire mesh 120 is a copper wire mesh 120.

[0180] In some embodiments, referring to FIG. 1, a liquid inlet 121 is further formed on the heat plate 100, the liquid inlet 121 is in communication with the inner cavity 13, a liquid injection pipe is arranged on the liquid inlet 121, the liquid injection pipe is in communication with the outside world, and the liquid injection pipe is used for inputting working fluid into the inner cavity 13.

[0181] The plate body 101 comprises a first part, a second part and a third part, and the second part is connected between the first part and the third part. Referring to FIG. 24, in some embodiments, the first part and the third part are located on the same plane, and the heat plate 100 is a “1” type structure. Referring to FIG. 25, in some other embodiments, the first part and the third part are located on different planes, and the heat plate 100 is an “L” type structure. Referring to FIG. 26, two “L” type heat plates 100 are combined to form a “T” type heat plate 100. The selection can be made according to actual conditions.

[0182] The application also provides a battery comprising the vapor chamber 100. The specific structure of the vapor chamber 100 is referred to the above embodiments. Since the battery adopts all the technical solutions of the above embodiments, it has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0183] In an embodiment, the battery further comprises a battery shell, and the battery shell is composed of the vapor chamber 100, that is, the six sides of the battery shell can be composed of the vapor chamber 100. In this way, the space can be saved and the space utilization rate can be improved. It should be noted that the six vapor chambers 100 can be in communication with each other or not, which can be selected according to the actual situation.

[0184] In some embodiments, the battery shell has six shell surfaces, and the vapor chamber 100 can be applied to any one of the shell surfaces of the battery shell or simultaneously applied to multiple shell surfaces, for example, the vapor chamber 100 is applied to two adjacent shell surfaces of the battery shell. The first part of the vapor chamber 100 corresponds to one shell surface, and the second part of the vapor chamber 100 corresponds to another shell surface, so that the vapor chamber 100 can serve as two shell surfaces of the battery shell. The specific selection can be made according to the size of the battery module.

[0185] In other embodiments, the vapor chamber 100 can also be used in the battery. The battery comprises a battery shell and a core pack group, the core pack group is installed in the battery shell, and the core pack group comprises at least one core pack. The first part of the vapor chamber 100 corresponds to one side surface of the core pack, and the second part of the vapor chamber 100 corresponds to another side surface of the core pack. In order to uniformly heat the adjacent core packs, the vapor chamber 100 can also be arranged between the two adjacent core packs to realize temperature balance of multiple side surfaces, so as to conduct the temperature of the high-temperature part to the low-temperature part directly cooled by the cooling plate, improve the cooling efficiency, and avoid thermal runaway.

[0186] In other embodiments, the vapor chamber 100 can also be used in the battery module. The battery module comprises a plurality of batteries, the first part of the vapor chamber 100 corresponds to one side surface of the battery shell, and the second part of the vapor chamber 100 corresponds to another side surface of the battery shell. In order to uniformly heat the adjacent batteries, the vapor chamber 100 can also be arranged between the two adjacent batteries to realize temperature balance of multiple side surfaces, so as to conduct the temperature of the high-temperature part to the low-temperature part directly cooled by the cooling plate.

[0187] The technical solution of Example Eight is further described in detail in combination with specific embodiments and data. It should be understood that the following embodiments are only used to explain Example Eight and do not limit Example Eight.

[0188] It should be noted that the welding method of Examples 1 to 3, Comparative Examples 1 and 2 is brazing, and the solder used is solder paste.

[0189] Example 1

[0190] The first plate body is formed with a first groove, and the second plate body is formed with a convex portion, the height of the convex portion is 0.1mm, and the depth of the first groove is 0.15mm.

[0191] Verification:

[0192] The heat plate is subjected to air tightness detection, and the heat plate air tightness is qualified;

[0193] The heat plate is cut, and after cutting, the structure inside the heat plate is observed, and it is found that there is no solder on the wick and the wire mesh.

[0194] Example 2

[0195] The first plate body is formed with a first groove, and the second plate body is formed with a convex portion, the height of the convex portion is 0.1mm, and the depth of the first groove is 0.2mm.

[0196] Verification:

[0197] The heat plate is subjected to air tightness detection, and the heat plate air tightness is qualified;

[0198] The heat plate is cut, and after cutting, the structure inside the heat plate is observed, and it is found that there is no solder on the wick and the wire mesh.

[0199] Example 3

[0200] The first plate body is formed with a first groove, and the second plate body is formed with a convex portion, the height of the convex portion is 0.1mm, and the depth of the first groove is 0.25mm.

[0201] Verification:

[0202] The heat plate is subjected to air tightness detection, and the heat plate air tightness is qualified;

[0203] The heat plate is cut, and after cutting, the structure inside the heat plate is observed, and it is found that there is no solder on the wick and the wire mesh.

[0204] Comparative Example 1

[0205] The first plate body is formed with a first groove, and the second plate body is formed with a convex portion, the height of the convex portion is 0.15mm, and the depth of the first groove is 0.1mm.

[0206] Verification:

[0207] The heat plate is subjected to air tightness detection, and the air tightness shows NG;

[0208] The heat plate is cut, and after cutting, the structure inside the heat plate is observed, and it is found that there is solder on the wick, and the wick is contaminated.

[0209] Comparative Example 2

[0210] A first slot is formed on the first plate body, and a convex part is formed on the second plate body, the height of the convex part is 0.05mm, and the depth of the first slot is 0.2mm.

[0211] Verification:

[0212] The heat plate is subjected to air tightness detection, and the air tightness shows NG.

[0213] The heat plate is cut, and the structure inside the heat plate is observed after cutting, and it is found that the wick and the wire mesh are free of solder.

Claims

1. An equalizing plate (100), comprising: a plate body (101) provided with an inner cavity (13), the plate body (101) comprising a first plate body (103) and a second plate body (104) oppositely arranged, the first plate body (103) comprising a first sub-plate body (105), a bending plate (107) and a second sub-plate body (106), the bending plate (107) being connected between the first sub-plate body (105) and the second sub-plate body (106); and a first reinforcing structure (108) connected to the first plate body (103) and located in the inner cavity (13), the first reinforcing structure (108) having a bending section (110) corresponding to the bending plate (107).

2. The vapor chamber (100) of claim 1, wherein The first reinforcing structure (108) comprises a first reinforcing plate (c1), the first reinforcing plate (c1) being arranged in a bending manner, the first reinforcing plate (c1) being provided with a first fluid passage (d1) on a side close to the first plate body (103), and the first reinforcing plate (c1) being provided with a second fluid passage (d2) on a side close to the second plate body (104).

3. The vapor chamber (100) of claim 2, wherein The first reinforcing structure (108) is arranged separately from the plate body (101); and / or, The first reinforcing plate (c1) is integrally formed.

4. The vapor chamber (100) according to claim 2 or 3, wherein The first reinforcing plate (c1) comprises at least one of a concave portion and a convex portion (22).

5. The vapor chamber (100) according to any one of claims 1-4, wherein The first reinforcing structure (108) further comprises a first section (109) and a second section (111), the bending section (110) being connected between the first section (109) and the second section (111), the first section (109) corresponding to the first sub-plate body (105), and the second section (111) corresponding to the second sub-plate body (106).

6. The vapor chamber (100) of claim 5, wherein In an extension direction of the first sub-plate body (105), a size of the first reinforcing structure (108) in the bending section (110) is L1, a size of the first reinforcing structure (108) in the first section (109) is L2, and a size of the first reinforcing structure (108) in the second section (111) is L3, L1:(L1+L2+L3)=(0.1~0.3):

1.

7. The vapor chamber (100) of claim 5 or 6, wherein The first reinforcing structure (108) comprises a plurality of reinforcing rib groups (113) and a reinforcing bottom plate (112), the plurality of reinforcing rib groups (113) being arranged on the reinforcing bottom plate (112) in a width direction of the first sub-plate body (105) at intervals, each of the reinforcing rib groups (113) comprising a plurality of first reinforcing ribs (114) arranged at intervals in the width direction of the first sub-plate body (105), in the width direction of the first sub-plate body (105), a size of the reinforcing bottom plate (112) is L4, and a size of the first reinforcing rib (114) is L5, L5:L4=(0.005~0.05):

1.

8. The heating plate (100) according to any one of claims 5-7, wherein The first reinforcing structure (108) comprises a plurality of reinforcing rib groups (113), each of the reinforcing rib groups (113) comprises a plurality of first reinforcing ribs (114), the plurality of first reinforcing ribs (114) are arranged at intervals along the width direction of the first sub-plate body (105), each of the first reinforcing ribs (114) comprises 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), and the plurality of second sub-reinforcing ribs (116) are arranged between the two first sub-reinforcing ribs (115) and located in the curved section (110).

9. The wick plate (100) according to claim 8, wherein The number of the second sub-reinforcing ribs (116) of each of the first reinforcing ribs (114) is n1, the number of the first reinforcing ribs (114) of each of the reinforcing rib groups (113) is n2, and n1=n2.

10. The vapor chamber (100) according to claim 8 or 9, further comprising a second reinforcing structure (122) arranged on the first sub-plate body (105) and the second sub-plate body (106) and located in the inner cavity (13), the second reinforcing structure (122) comprises a plurality of reinforcing sub-ribs, 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 ribs (116) on the plate body (101) is V2, and V1:V2=(2-6):

1.

11. The heating plate (100) according to any one of claims 8-10, wherein In the length direction of the first sub-plate body (105), the size of the first reinforcing structure (108) in the curved section (110) is L1, the size of the first reinforcing structure (108) in the first section (109) is L2, the size of the first reinforcing structure (108) in the second section (111) is L3, and the size of each of the second sub-reinforcing ribs (116) is L6, and L6:(L1+L2+L3)=(0.03-0.2):

1.

12. The heating plate (100) according to any one of claims 5-11, wherein The first reinforcing structure (108) is integrally formed with the plate body (101).

13. The vapor chamber (100) of any of claims 1-12, wherein, The bending angle of the bent plate (107) is α, and the bending angle of the curved section (110) is β, 90°≤α≤95°, 90°≤β≤95°, and α=β.

14. The vapor chamber (100) of any of claims 1-13, wherein, The first reinforcing structure (108) and the first plate body (103) and / or the second plate body (104) form a fluid channel therebetween, and the fluid channel is used for the working fluid in the inner cavity (13) to flow.

15. The wick plate (100) according to claim 14, wherein The first reinforcing structure (108) comprises a first reinforcing plate (c1), a second reinforcing plate (c0), and a plurality of partition plates (a1). The first reinforcing plate (c1) and the second reinforcing plate (c0) are oppositely arranged and connected to each other to enclose a total channel extending along the length direction of the first plate body (103), and a plurality of the partition plates (a1) are connected between the first reinforcing plate (c1) and the second reinforcing plate (c0) to separate the total channel into a plurality of sub-channels (a2) along the width direction of the first plate body (103), and the plurality of sub-channels (a2) are used for the working fluid to pass through. The fluid channel comprises the sub-channels (a2).

16. The wick plate (100) of claim 14, wherein The first reinforcing structure (108) comprises a first reinforcing plate (c1), and a plurality of first grooves (c2) are formed on the side of the first reinforcing plate (c1) close to the first plate body (103), and the groove walls of the plurality of first grooves (c2) and the first plate body (103) enclose a first channel, and the first channel is used for the working fluid to pass through. The fluid channel comprises the first channel.

17. The wick plate (100) of claim 14, wherein, The first reinforcing structure (108) comprises a first reinforcing plate (c1), and a plurality of second grooves (c3) are formed on the side of the first reinforcing plate (c1) away from the first plate body (103), and the groove walls of the plurality of second grooves (c3) and the second plate body (104) enclose a second channel, and the second channel is used for the working fluid to pass through. The fluid channel comprises the second channel.

18. The wick plate (100) of claim 14, wherein, The first reinforcing structure (108) comprises a first reinforcing plate (c1), and the first reinforcing plate (c1) is concave-convex, the first reinforcing plate (c1) is provided with a first fluid channel (d1) on the side close to the first plate body (103), and the first reinforcing plate (c1) is provided with a second fluid channel (d2) on the side close to the second plate body (104).

19. The wick plate (100) of claim 18, wherein The first reinforcing plate (c1) is provided with a third groove on the side close to the first plate body (103), and the groove walls of the third groove and the first plate body (103) enclose the first fluid channel (d1); The first reinforcing plate (c1) is provided with a fourth groove on the side close to the second plate body (104), and the groove walls of the fourth groove and the second plate body (104) enclose the second fluid channel (d2).

20. The wick plate (100) according to claim 16 or 17 or 18, wherein The first reinforcing plate (c1) is integrally formed.

21. The vapor chamber (100) of any of claims 1-20, wherein, The plate body (101) comprises a stainless steel plate body (101); and / or, The first reinforcing structure (108) comprises a first stainless steel reinforcing structure.

22. The vapor chamber (100) of any of claims 1-21, wherein, The first reinforcing structure (108) abuts against the second plate body (104).

23. The vapor chamber (100) of any of claims 1-22, wherein, The first plate body (103) and / or the second plate body (104) is provided with a first groove (21), the first groove (21) is arranged around the inner cavity (13), and the first groove (21) is provided with a solder for welding the first plate body (103) and the second plate body (104).

24. The wick plate (100) of claim 23, wherein An edge of the first plate body (103) is formed with a first connecting wall (112b) which is adjacent to the inner cavity (13), and the first connecting wall (112b) is provided with the first groove (21) on a side facing the second plate body (104), and the second plate body (104) covers the first groove (21).

25. The wick plate (100) of claim 24, wherein The first groove (21) has a first side (211) close to the inner cavity (13) and a second side (212) away from the inner cavity (13), and a vertical distance from the first side (211) to the second side (212) is D1, a width of the first connecting wall (112b) is D4, and 0.05≤D1 / D4≤0.

25.

26. The wick plate (100) of claim 25, wherein A vertical distance from the first side (211) to an edge of the inner cavity (13) is D2, and a vertical distance from the second side (212) to a side of the first connecting wall (112b) away from the inner cavity (13) is D3, and 0.9≤D2 / D3≤1.

1.

27. The heating plate (100) according to any one of claims 24-26, wherein An edge of the second plate body (104) is formed with a second connecting wall (122b) which is adjacent to the inner cavity (13), and the second connecting wall (122b) corresponds to the first connecting wall (112b), and the second connecting wall (122b) is provided with a convex part (22) on a side facing the first connecting wall (112b), and the convex part (22) is embedded in the first groove (21).

28. The wick plate (100) of claim 27, wherein Along a thickness direction of the first plate body (103), a height of the convex part (22) is E1, and a depth of the first groove (21) is E2, and the E1 is less than the E2, so that an accommodation cavity (23) is formed between the first groove (21) and the convex part (22), and the solder is arranged in the accommodation cavity (23).

29. The wick plate (100) of claim 28, wherein E2=E1+e1, e1 is a first coefficient, and 0.05mm≤e1≤0.15mm.

30. The wick plate (100) according to claim 28 or 29, wherein A thickness of the first connecting wall (112b) is E3, and 0.06≤E2 / E3≤0.7; and / or, A thickness of the second connecting wall (122b) is E4, and 0.05≤E1 / E4≤0.

6.

31. The heating plate (100) according to any one of claims 28-30, wherein A volume of the accommodation cavity (23) is V1, and a volume of the solder is V2, and 0.65≤V2 / V1≤1.

32. The heating plate (100) according to any one of claims 28-31, wherein A groove width of the first groove (21) is F1, and a width of the convex part (22) is F2, F1=F2+e2, e2 is a second coefficient, and 0.03mm≤e2≤0.05mm.

33. A battery comprising the vapor chamber (100) according to any one of claims 1-32.

34. A battery module comprising the vapor chamber (100) according to any one of claims 1-32 or the battery according to claim 33.

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