Machinable, high thermal conductivity, high density energy storage module and its processing technology

Abstract

The present invention relates to the field of energy storage modules, and specifically to a machinable, high thermal conductivity, high-density energy storage module and its processing technology. The present invention provides a machinable, high thermal conductivity, high-density energy storage module, comprising: a blank box, wherein the blank box has two support stations inside, wherein the support station has a support assembly, and the support assembly is rotatably connected to the blank box; wherein when storing, one side of the workpiece is inserted into the inner side of any of the support assemblies, and rotated along the abutment with the support assembly, so that the two sides of the workpiece are respectively mounted on the two support assemblies. A support assembly is arranged in the blank box, and when the workpiece is stored in the blank box, the workpiece is supported by the support assembly to make linear contact with the workpiece, so as to avoid surface contact between the workpiece and the bottom of the blank box, thereby avoiding damage to the Ti coating on the surface of the workpiece when the workpiece slides relative to the blank box.

Description

Technical Field

[0001] The present invention relates to the field of energy storage modules, and in particular to a machinable, high-thermal-conductivity, high-density energy storage module and a processing technology thereof. Background Art

[0002] With the development of electronic technology, electronic devices are gradually becoming smaller and more powerful. During operation, small and high-power electronic devices will generate more heat locally. If this heat cannot be handled in time, it will cause the local temperature of the electronic device to be too high, which will have a significant impact on the performance and even life of the electronic device. Therefore, heat dissipation equipment technology is particularly critical here. How to match electronic devices with different shapes, how to absorb more heat, and how to dissipate heat faster have become the only way to solve the increasingly serious heat dissipation problem of electronic devices.

[0003] Phase change energy storage materials use the latent heat in the phase change process of phase change materials to absorb the heat generated by electronic devices. Its application can effectively reduce the temperature of electronic devices. At present, the mainstream phase change energy storage materials are paraffin and liquid metal. But both of them have their own defects.

[0004] Before welding, the composite materials used in energy storage modules need to be stored in blanks. To ensure welding, solder is coated on both sides of the composite materials. When the composite materials are placed in the blanks and transported, the composite materials will rub against the inside of the blanks, causing the solder to fall off. At the same time, the coating on the surface of the composite materials will also be damaged due to friction, causing leakage when the composite materials are poured with liquid metal. Therefore, it is necessary to design a machinable, high-thermal-conductivity, high-density energy storage module and its processing technology. Summary of the invention

[0005] The embodiments of the present disclosure at least provide a machinable, high-thermal-conductivity, high-density energy storage module and its processing technology to solve the above-mentioned problems.

[0006] In a first aspect, the embodiments of the present disclosure provide a machinable, high thermal conductivity, high density energy storage module, comprising: a blank box, wherein the blank box has a plurality of support stations inside, wherein the support stations have support assemblies inside, and the support assemblies are rotatably connected to the blank box;

[0007] When storing, one side of the workpiece is inserted into the inner side of any one of the supporting components and rotated along the abutment with the supporting component, so that the two sides of the workpiece are respectively mounted on the two supporting components.

[0008] In an optional embodiment, two support grooves are opened in the blank box, and the two support components are rotatably installed in the two support grooves respectively.

[0009] In an optional embodiment, the support assembly includes a support plate, the support plate is L-shaped, and a corner of the support plate is rotatably connected to the support groove.

[0010] In an optional embodiment, a plurality of receiving grooves are provided on the inner side of the corner of the support plate, and the receiving grooves penetrate the support plate along the width direction.

[0011] In an optional embodiment, one end of the support plate away from the support groove extends toward the opening of the blank box;

[0012] The end of the support plate is hingedly provided with a sliding plate.

[0013] In a second aspect, the present invention further provides a processing technology for an energy storage module, comprising the energy storage module as shown above,

[0014] S1. The foamed graphite is plated with Ti to form a heat-conducting skeleton, and the heat-conducting skeleton is installed in a mold;

[0015] S2, pouring liquid metal into the mold, and the liquid metal heat-conducting skeleton forms a composite material after cooling;

[0016] S3, composite material processing shape;

[0017] S4, vacuum coating on composite surface;

[0018] S5, machining the shape of the blank box, and loading the composite material onto the supporting assembly inside the blank box at one time;

[0019] S6, low temperature vacuum brazing;

[0020] S7, baking leakage test;

[0021] S8. Continue the shape processing and perform fine processing on the baked blank box, that is, process it into a boss that matches the shape of the electronic device to complete the finished product processing of the energy storage module.

[0022] In an optional embodiment, in S2, the processed foamed graphite is placed in a mold, and the whole is placed in a vacuum box, and a vacuum degree of 1×10 —4 Pa. The liquid metal is poured into the mold through a pressurizing device at a positive pressure of 10MPa. After the pouring is completed, the valve is closed. By applying positive pressure, the interfacial thermal resistance between the liquid metal and the foamed graphite is reduced, and the thermal conductivity is improved. Finally, after cooling, a thermal conductive skeleton + liquid metal composite material is obtained.

[0023] In an optional implementation, in S3, the mold is removed, the cooled and solidified thermal conductive skeleton + liquid metal composite material is taken out, and the solidified thermal conductive skeleton + liquid metal composite material is cold processed to obtain the required external dimensions.

[0024] In an optional embodiment, in S4, the surface of the machined composite material is treated with A-174 silane coupling agent to improve the adhesion of the composite material to polyparaxylene, and then a vapor deposition polymerization process is used to plate polyparaxylene on the surface of the composite material.

[0025] In an optional implementation, in S6, the coated heat-conducting skeleton and the liquid metal composite material are assembled into the upper and lower blank plates, and low-temperature vacuum brazing is performed.

[0026] In an optional implementation, in S7, the blank plate after vacuum brazing is placed in an oven and baked at 150° C., and there is no leakage or deformation after 2 hours.

[0027] Compared with the prior art, the present invention has the following beneficial effects: a support assembly is arranged in the blank box, and when the workpiece is stored in the blank box, the workpiece is supported by the support assembly to make linear contact with the workpiece, so as to avoid surface contact between the workpiece and the bottom of the blank box, thereby avoiding damage to the Ti coating on the surface of the workpiece when the workpiece and the blank box slide relative to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A three-dimensional diagram of a blank box provided in an embodiment of the present disclosure;

[0030] Figure 2 A first cross-sectional view of a blank box provided by an embodiment of the present disclosure;

[0031] Figure 3 A second cross-sectional view of a blank box provided by an embodiment of the present disclosure;

[0032] Figure 4 Shows Figure 3 A partial enlarged view of part A;

[0033] Figure 5 Shows Figure 3 A partial enlarged view of part B;

[0034] Figure 6 A schematic diagram of a foam graphite coating provided by an embodiment of the present disclosure is shown;

[0035] Figure 7A schematic diagram of pouring liquid metal provided by an embodiment of the present disclosure is shown;

[0036] Figure 8 A schematic diagram of polyparaxylene coating provided by an embodiment of the present disclosure is shown;

[0037] Fig. 9 A process flow chart of energy storage module rating provided by an embodiment of the present disclosure is shown.

[0038] In the figure:

[0039] 1. Blank box; 11. Support slot; 12. First card slot; 13. Second card slot;

[0040] 2. Support assembly; 21. Support plate; 22. Storage slot; 23. Sliding plate; 24. Sliding slot 24;

[0041] 3. Boss;

[0042] 41. Ti powder; 42. foamed graphite; 43. vacuum sintering furnace; 44. Ti film;

[0043] 51. Liquid metal; 52. Pressurizing device; 53. Injection pipeline; 54. Valve; 55. Vacuum box;

[0044] 61. reaction chamber; 62. dimer gas; 63. heater;

[0045] 7. Mould. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Research has found that before welding, the composite materials used to make energy storage modules need to be stored in blanks. In order to ensure welding, solder is coated on both sides of the composite materials. When the composite materials are placed in the blanks and transported, the composite materials will rub against the inside of the blanks, causing the solder to fall off. At the same time, the coating on the surface of the composite materials will also be damaged by friction, causing leakage when the composite materials are poured with liquid metal 51.

[0048] The defects existing in the above solutions are the results obtained by the inventor after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present disclosure for the above problems below should be the contributions made by the inventor to the present disclosure during the disclosure process.

[0049] In the following, some embodiments of the present invention are described in detail in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. In addition, in the accompanying drawings, in order to effectively describe the technical content, the thickness of the components can be exaggerated or reduced.

[0050] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0051] Based on the above research, the present disclosure provides a machinable, high thermal conductivity, high density energy storage module. Figure 1 The energy storage module includes: a blank box 1 and two supporting components. The blank box 1 is a hollow box body with a cubic structure. The top of the blank box 1 is open. The workpiece can be placed into the blank box 1 from the opening. At the same time, the blank box 1 can carry and carry several workpieces. After the workpieces are placed in the blank box 1, an energy storage module is formed. The blank box 1 is a metal shell, which can be specifically selected from aluminum alloy or copper alloy. After the workpieces in the blank box 1 are placed, they are used as energy storage materials. After the energy storage module is processed, it can be installed in the heat dissipation part of the electronic device. When the electronic device is in working state, heat is generated. The heat is transferred to the blank box 1, and the blank box 1 performs preliminary heat diffusion and transfers it to the internal heat-conducting skeleton. The workpiece is a composite material obtained by cooling the heat-conducting skeleton after the liquid metal 51 is poured into the heat-conducting skeleton. The liquid metal 51 can be selected from metal gallium, gallium-indium alloy, gallium-aluminum alloy or other gallium-based liquid metal 51. The liquid metal 51 fills the gaps in the heat-conducting skeleton, fully contacts the heat-conducting skeleton, absorbs the heat from the heat-conducting skeleton, and undergoes phase change to take away the heat.

[0052] In some embodiments, the blank box 1 has a 3-5mm processing allowance, so the energy storage module has extremely high processability for electronic devices in different scenarios, can be processed into any shape, and has a certain dimensional accuracy to meet the installation requirements of electronic devices. The energy storage module uses a thermal conductive skeleton + liquid metal 51, that is, a thermal conductive skeleton + energy storage material. The high porosity (more than 80%) of the thermal conductive skeleton (foamed graphite 42) ensures that more energy storage materials can be filled in it; in addition, the high thermal conductivity (1000W / m·K) of the thermal conductive skeleton (foamed graphite 42) ensures fast heat transfer and reduces the overall thermal resistance inside the module.

[0053] In some embodiments, liquid metal 51 is used as the energy storage material of the energy storage module. The density of liquid metal 51 (7.4g / cm3~8.7g / cm3) is much greater than the density of traditional paraffin (0.8g / cm3), so its phase change latent heat can reach 300KJ / L, which is higher than the phase change latent heat of paraffin (230KJ / L). Under the same volume, liquid metal 51 can absorb more heat, and the thermal conductivity of liquid metal 51 (20~50W / m.K) is also much higher than the thermal conductivity of traditional phase change paraffin (0.1~0.6W / m.K). Liquid metal 51 has great advantages as an energy storage material compared with paraffin.

[0054] On the other hand, although paraffin, as an organic material, has a phase change latent heat of up to 200KJ / kg, its density is relatively low. When used as an energy storage material, its energy storage density is not high. The thermal conductivity of paraffin is extremely low, only about 0.1 to 0.6W / m·K, and it cannot quickly take away the heat of electronic devices. In addition, since the boiling point of paraffin is not high, paraffin is often poured after the energy storage module is welded, which puts higher requirements on the processing technology, welding technology, and module structural strength. As for liquid metal 51, it is extremely corrosive and cannot directly contact with conventional metals, and cannot be directly used in conventional metal heat dissipation modules. In addition, due to its high surface tension, it is difficult to directly inject it into the energy storage module cavity.

[0055] Reference Figure 2 and Figure 3 In at least one embodiment, a plurality of support grooves 11 are provided inside the blank box 1 to form various support stations. Preferably, the number of the support grooves 11 is four, and the support grooves 1 are evenly distributed circumferentially. At the same time, each support assembly is rotatably installed inside the corresponding support groove 11. Through the above arrangement, when storing the workpiece in the blank box 1, one side of the workpiece is first inserted into the inner side of any support assembly 2 so that one side of the workpiece contacts the support assembly 2 first, and then the workpiece is slowly lowered so that the workpiece rotates downward around the contact point with the support assembly 2 until the workpiece is placed on the two support assemblies 2. At this time, the bottom of the workpiece is in line contact with the two support assemblies 2, thereby reducing the contact surface between the workpiece and the two support assemblies 2, that is, reducing the possibility of damage to the coating on the surface of the workpiece due to friction.

[0056] Specifically, compared to directly placing the workpiece flat into the blank box 1, the side wall of the workpiece will continuously rub against the inner wall of the blank box 1, thereby causing the coating on the side wall of the workpiece to be damaged due to friction, resulting in internal leakage of the workpiece. In the present application, through the setting of the support component 2, one end of the workpiece is against one end of the support component 2, and the other end can be flipped downward to be supported on the relative support component 2. During the flipping process, due to the presence of the support components 2 on all sides, the workpiece does not contact the side wall of the blank box 1, thereby avoiding wear on the side wall of the workpiece. At the same time, compared to the first workpiece being placed in the blank box 1 and then contacting the inner bottom wall of the blank box 1, in the present application, through the setting of the support component 2, the first workpiece is supported on two support components 2, and the workpiece and the support component 2 are in line contact. The contact area at the bottom of the workpiece is small, and the area at the bottom of the workpiece that may be worn is small, thereby avoiding the possibility of wear on the bottom of the workpiece as much as possible.

[0057] Furthermore, compared to the method of directly placing the workpiece flatly into the blank box 1, in which the opening of the blank box 1 is generally equal to the size of the workpiece or slightly larger than the size of the workpiece, when the workpiece is placed from the top of the blank box 1, the workpiece deflects and gets stuck when it descends, and cannot be placed accurately. The method of the present application can ensure that the workpiece can be placed at the bottom of the blank box 1.

[0058] Reference Figure 4 In at least one embodiment, the support assembly 2 includes a support plate 21, which is L-shaped, and the corner of the support plate 21 is rotatably connected to the support groove 21. The two support plates 21 are mirror-imaged, and the inner sides of the support plates 21 correspond to each other. The workpiece can be placed between the two support plates 21, and the two sides of the workpiece are respectively placed on the bottom plate of the L-shaped support plate 21. As an option, in the process of placing the workpiece, the two support plates 21 can be turned outward to both sides respectively to make the bottom plate of the support plate 21 tilted. At this time, one side of the workpiece is inserted into any one of the support plates 21 and contacts with the corner, and one side of the workpiece is in line contact with the support plate 21. Then, the workpiece is rotated until the workpiece is parallel to the bottom plate of the support plate 21, and then released. The workpiece can be automatically flipped and placed on the ends of the bottom plates of the two support plates 21 respectively. At this time, the two sides of the bottom of the workpiece are in line contact with the two support plates 21, thereby reducing the contact surface between the workpiece and the two support plates 21, that is, reducing the possibility of damage to the coating on the surface of the workpiece due to friction.

[0059] Reference Figure 3In at least one embodiment, in order to enable the support plate 21 to remain in an outward-turned state when the workpiece is placed, one end of the support plate 21 away from the support groove 11 extends toward the opening of the blank box 1 to form a long side, and a sliding groove 24 is provided on the sliding plate at the top end of the support plate 21, and a sliding plate 23 is slidably arranged in the sliding groove 24. At the same time, a first card groove 12 is provided below the position of the sliding groove 24 on the inner wall of the blank box 1, and the first card groove 12 is tilted downward. After the support plate 21 is opened outward, the sliding plate 23 can be slid to be inserted into the first card groove 12 to position the support plate 21 so that the support plate 21 remains in an outward-turned state.

[0060] In at least one embodiment, in order to arrange each workpiece neatly after being placed in the blank box 1 to ensure a good phase change effect, the sliding plate will be pulled out of the first slot 12, and the gravity of each workpiece will press each support plate 11 to flip it. During the flipping process, the long sides of each support plate 11 will align the workpiece from all sides. The support plates 11 can also be manually operated to center each workpiece after each support plate 11 is flipped.

[0061] In at least one embodiment, in order to keep the support plate 11 centered on the workpiece to ensure that the workpieces will not shift during subsequent use, the support plate 11 needs to be positioned, and a second slot 13 is also provided on the side wall of the blank box 1. The second slot 13 is a horizontal slot, and the second slot 13 corresponds to the height of the support plate 11 in the vertical state. After the support plate 11 is centered, the sliding plate is slid to be inserted into the second slot 13, and the support plate 11 is positioned by cooperating with the sliding plate and the second slot 13 to avoid the support plate 11 shaking and causing the workpiece to shake, thereby ensuring the phase change performance of the workpiece during use.

[0062] In at least one embodiment, in order to further prevent the bottom of the workpiece from being worn, the short side of the support plate 11 in contact with the workpiece line can be chamfered to ensure the surface integrity of the workpiece. At the same time, the missing fillet can accommodate welding filler to improve the welding effect.

[0063] Reference Figure 4 In at least one embodiment, a plurality of receiving grooves 22 are provided on the inner side of the corner of the support plate 21, and the receiving grooves 22 penetrate the support plate 21 in the width direction. Meanwhile, the receiving grooves 22 are evenly distributed in the length direction of the support plate 11. By providing the receiving grooves 22, after the support plate 21 positions the workpiece, a certain gap is still left between the two side walls of the workpiece and the support plate 21, so as to ensure that during the process of pouring the welding filler into the blank plate 1, the side walls can also be fully in contact with the welding filler, thereby ensuring the welding stability between the two adjacent workpieces, and further avoiding the situation where the workpiece is offset during the working process and affects the phase change effect.

[0064] In at least one embodiment, the spacing between two adjacent receiving grooves 22 is equal to the thickness of a workpiece, and the receiving groove 22 is located between the two workpieces. Through such a design, after each workpiece is straightened, the workpiece is pressed so that the welding filler on the outer surface of the workpiece is squeezed into the receiving groove 22, so that welding filler also exists on the outside of the position of the two adjacent workpieces, so that welding can be performed at the outer wall of the workpiece to ensure the welding stability of each workpiece.

[0065] In at least one embodiment, the bottom of the blank box 1 also has a boss, and the boss structure is adapted to the surface of the electronic device so that the energy storage module can better dissipate heat for the electronic device.

[0066] In addition, the present disclosure provides a processing technology for an energy storage module, using the energy storage module shown in the first embodiment, referring to Fig. 9 , the specific processing technology is as follows:

[0067] Step S1, the foamed graphite 42 is plated with Ti to form a heat-conducting skeleton, and the heat-conducting skeleton is installed in a mold 7;

[0068] Step S2, pouring liquid metal 51 into the mold 7, and the liquid metal 51 and the heat-conducting skeleton are cooled to form a composite material;

[0069] Step S3, processing the composite material into an outer shape;

[0070] Step S4, vacuum coating the surface of the composite material;

[0071] Step S5, machining the outer shape of the blank box 1, and loading the composite material onto the supporting assembly 2 inside the blank box 1 at one time;

[0072] Step S6, low temperature vacuum brazing;

[0073] Step S7, baking leakage test;

[0074] Step S8, continue the shape processing, and fine-process the baked blank box 1, that is, process it into a boss that matches the shape of the electronic device, and complete the finished product processing of the energy storage module.

[0075] Reference Figure 6 In at least one embodiment, in step S1, the foamed graphite 42 is plated with Ti by a powder covering sintering method, that is, Ti powder 41 is added into a vacuum sintering furnace 43 containing the foamed graphite 42, and heated and diffused. The vacuum sintering furnace 43 is set at a temperature of 800°C and the diffusion and heat preservation time is 10 minutes. The Ti film 44 can enhance the wettability between the foamed graphite 42 and the liquid metal 51, and the thickness of the Ti film 44 is 3-5 um.

[0076] Reference Figure 7In at least one embodiment, in step S2, the processed thermally conductive skeleton is placed in the mold 7, and the whole is placed in the vacuum box 55, and the vacuum degree is 1×10 —4 Pa. The liquid metal 51 is poured into the mold 7 through the pressure device 52 at a positive pressure of 10 MPa through the pouring pipeline 53. After the pouring is completed, the valve 54 is closed. By applying positive pressure, the interface thermal resistance between the liquid metal 51 and the heat-conducting skeleton is reduced, and the thermal conductivity is improved. Finally, after cooling, a composite material of the heat-conducting skeleton + liquid metal 51 is obtained.

[0077] In at least one embodiment, in S3, the mold 7 is removed, the thermally conductive skeleton + liquid metal 51 composite material after cooling and solidification is taken out, and the solidified thermally conductive skeleton + liquid metal 51 composite material is cold processed to obtain the required external dimensions.

[0078] Reference Figure 8 In at least one embodiment, in S4, the machined composite material is placed on a heater 63 in a reaction chamber 61. The surface of the composite material is treated with an A-174 silane coupling agent to improve the adhesion of the composite material to xylene, and then a vapor deposition polymerization process (CVD) is used to coat a dimer gas 62, such as polyparaxylene, on the surface of the composite material.

[0079] In at least one embodiment, in S6, the coated thermally conductive skeleton and the liquid metal 51 composite material are assembled into the blank box 1 to form an energy storage module, and low-temperature vacuum brazing is performed.

[0080] In at least one embodiment, in S7, the energy storage module after vacuum brazing is placed in an oven and baked at 150° C., and there is no leakage or deformation after 2 hours.

[0081] It is worth mentioning that the technical features such as other components involved in the patent application of this invention should be regarded as prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected by conventional methods in the field, and should not be regarded as the inventive point of this patent. This patent will not be further elaborated.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A machinable, high thermal conductivity, high density energy storage module, characterized in that: include: A blank box (1), wherein the blank box (1) has a plurality of support stations inside, wherein the support stations have support components (2), and the support components (2) are rotatably connected to the blank box (1); in When storing, one side of the workpiece is inserted into the inner side of any one of the support assemblies (2) and rotated along the abutment with the support assembly (2) so that the two sides of the workpiece are respectively mounted on the two support assemblies (2); Two support grooves (11) are provided in the blank box (1), and the two support assemblies (2) are rotatably mounted in the two support grooves (11) respectively; The support assembly (2) comprises a support plate (21), the support plate (21) is L-shaped, and the corner of the support plate (21) is rotatably connected to the support groove (11); The two support plates (21) are arranged in mirror image, and the inner sides of the support plates (21) correspond to each other, and the workpiece can be placed between the two support plates (21), and the two sides of the workpiece are respectively placed on the bottom plate of the L-shaped support plate (21); In the process of placing the workpiece, the two support plates (21) are first turned outward to both sides respectively so that the bottom plates of the support plates (21) are tilted. At this time, one side of the workpiece is inserted into any one of the support plates (21) and contacts the corner. One side of the workpiece is in line contact with the support plate (21). Then, the workpiece is rotated until the workpiece is parallel to the bottom plates of the support plates (21). Then, the workpiece is released, and the workpiece is automatically turned over and placed on the ends of the bottom plates of the two support plates (21).

2. The energy storage module according to claim 1, characterized in that: A plurality of receiving grooves (22) are provided on the inner side of the folded corner of the support plate (21), and the receiving grooves (22) penetrate the support plate (21) along the width direction.

3. The energy storage module according to claim 2, characterized in that: One end of the support plate (21) away from the support groove (11) extends toward the opening of the blank box (1); A sliding plate (23) is hingedly provided at the end of the support plate (21).

4. A processing technology for an energy storage module, comprising the energy storage module according to claim 3, characterized in that: S1, the foamed graphite (42) is plated with Ti to form a heat-conducting skeleton, and the heat-conducting skeleton is installed in a mold (7); S2, pouring liquid metal (51) into the mold (7), and the liquid metal (51) heat-conducting skeleton is cooled to form a composite material; S3, composite material processing shape; S4, vacuum coating on composite surface; S5, machining the outer shape of the blank box (1), and loading the composite material onto the supporting assembly (2) inside the blank box 1 at one time; S6, low temperature vacuum brazing; S7, baking leakage test; S8, continuing the outer shape processing, and fine-processing the baked blank box (1), that is, processing it into a boss that matches the shape of the electronic device, and completing the processing of the energy storage module as a finished product.

5. The processing technology according to claim 4, characterized in that: In S2, the processed foamed graphite (42) is placed in the mold (7), and the whole is placed in a vacuum box (55), and the vacuum degree is 1×10 —4 Pa, the liquid metal (51) is poured into the mold (7) at a positive pressure of 10 MPa through a pressurizing device (52). After the pouring is completed, the valve (54) is closed. By applying positive pressure, the interface thermal resistance between the liquid metal (51) and the foamed graphite (42) is reduced, and the thermal conductivity is improved. Finally, after cooling, a thermally conductive skeleton + liquid metal (51) composite material is obtained.

6. The processing technology according to claim 4, characterized in that: In S3, the mold (7) is removed, the thermally conductive skeleton + liquid metal (51) composite material that has been cooled and solidified is taken out, and the solidified thermally conductive skeleton + liquid metal (51) composite material is cold processed to obtain the required external dimensions.

7. The processing technology according to claim 4, characterized in that: In S4, the surface of the machined composite material is treated with A-174 silane coupling agent to improve the adhesion of the composite material to polyparaxylene, and then the vapor deposition polymerization process is used to plate polyparaxylene on the surface of the composite material.

8. The processing technology according to claim 4, characterized in that: In S6, the coated heat-conducting skeleton and the liquid metal (51) composite material are assembled into the upper and lower blank plates and low-temperature vacuum brazing is performed.

9. The processing technology according to claim 4, characterized in that: In S7, the blank plate after vacuum brazing is placed in an oven and baked at 150°C. After 2 hours, there is no leakage and no deformation.

Images