Nuclear battery series-parallel packaging structure based on beta radiation Ford effect, beta radiation photovoltaic effect and double effect

Abstract

The utility model relates to the field of nuclear energy technology application, in particular to a nuclear battery series-parallel packaging structure based on beta radiation Ford effect, beta radiation photovoltaic effect and double effect, which comprises a battery protective shell, a nuclear battery integrated substrate laminated structure, a nuclear battery and an inner lead, a bonding material is fixedly bonded to the bottom of the nuclear battery integrated substrate laminated structure, and the nuclear battery integrated substrate laminated structure is fixed to the main shell through the bonding material; the main shell is of an inner hollow cubic thin-wall structure, the volume of an inner cavity of the main shell is matched with the volume of a nuclear battery integrated substrate laminated structure, the top of the main shell is of a two-step structure, and the bottom of the shell cover is embedded into the two-step structure at the top of the main shell and is bonded with the two-step structure through a bonding material. The technical scheme is used for solving the problems of small power output, large packaging structure size, low integration level and poor stability of the nuclear battery monomer in the prior art.

Description

Technical Field

[0001] The utility model relates to the application field of nuclear energy technology, in particular to a series-parallel packaging structure of nuclear batteries based on beta radiation Ford effect, beta radiation photovoltaic effect and double effect. Background Art

[0002] A nuclear battery, also called a radioisotope battery or atomic battery, is a device that uses the energy released during the decay of radioisotopes to generate electrical energy. Nuclear batteries do not require sunlight or other external conditions, making them ideal for operation in extreme environments such as the deep sea, space exploration, or remote areas. They are primarily used to provide long-term, low-power electricity in applications where it is difficult to use traditional energy sources. For example, nuclear batteries are often used as energy sources for scientific instruments and probes on spacecraft, as these devices often need to operate for long periods of time in remote areas of space or areas that are not covered by solar energy. In addition, environmental monitoring stations, automatic lighthouses, medical equipment (such as pacemakers), and military devices are also examples of applications for nuclear batteries.

[0003] β-radiation Ford effect, β-radiation photovoltaic effect and dual-effect nuclear batteries are several advanced nuclear batteries that convert nuclear energy into electrical energy by utilizing two different energy conversion mechanisms, β-radiation Ford effect and radiation photovoltaic effect, separately or in combination. β-radiation Ford effect involves the process of β particles (electrons) produced by radioactive isotope decay stimulating semiconductor materials to produce photoelectric effect to generate electricity, while radiation photovoltaic effect uses photons produced by radioactive substances to stimulate fluorescent substances to stimulate semiconductor materials to produce photoelectric effect, thereby generating electricity.

[0004] At present, the main challenges faced by β-radiation Ford effect, β-radiation photovoltaic effect batteries and dual-effect nuclear batteries include low single-cell power output, large packaging structure, low integration and poor stability. These problems are mainly caused by low energy conversion efficiency in nuclear batteries and insufficient packaging structure of existing nuclear batteries. These problems not only limit the application scope of nuclear batteries, but also put forward higher requirements for their safety and reliability. It is urgent to solve them by designing a high-power, high-integration and high-stability packaging structure. To this end, we propose a series-parallel packaging structure based on β-radiation Ford effect, β-radiation photovoltaic effect and dual-effect nuclear batteries. Utility Model Content

[0005] The main purpose of the utility model is to provide a series-parallel packaging structure of nuclear batteries based on β-radiation Ford effect, β-radiation photovoltaic effect and dual-effect, which can effectively solve the problems in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A nuclear battery serial-parallel packaging structure based on β-radiation Ford effect, β-radiation photovoltaic effect and dual effect, comprising a battery protective shell, a nuclear battery integrated substrate laminate structure, a nuclear battery and an inner lead, wherein the battery protective shell is composed of a main shell and a shell cover, an adhesive material is fixedly bonded to the bottom of the nuclear battery integrated substrate laminate structure, and the nuclear battery integrated substrate laminate structure is fixed to the main shell by the adhesive material;

[0008] The main shell is a hollow cubic thin-walled structure, the inner cavity volume of the main shell is adapted to the volume of the nuclear battery integrated substrate laminate structure, the top of the main shell is a two-step stepped structure, the bottom of the shell cover is embedded in the two-step stepped structure on the top of the main shell and bonded by an adhesive material, and the adhesive material is a polymer plastic;

[0009] The nuclear battery integrated substrate stacking structure is arranged in the main shell, and the gap between the nuclear battery integrated substrate stacking structure and the main shell is filled with epoxy resin. The nuclear battery integrated substrate stacking structure is formed by stacking and welding a plurality of identical single nuclear battery integrated substrates placed in the nuclear battery, and the single nuclear battery integrated substrates are all multi-layer boards;

[0010] The single nuclear battery integrated substrate is provided with an inner layer circuit inside, the single nuclear battery integrated substrate is provided with a plurality of cavities used in conjunction with the nuclear battery, the single nuclear battery integrated substrate is provided with a plurality of through holes, and the through holes are filled with conductive metal, the upper surface of the single nuclear battery integrated substrate is provided with a plurality of pads, and the lower surface of the single nuclear battery integrated substrate is provided with a plurality of pads and convex solder balls, the convex solder balls and the pads are aligned with the through holes on the corresponding layer, and the single nuclear battery integrated substrates of the upper and lower adjacent layers are electrically interconnected through the pads and the convex solder balls;

[0011] The nuclear battery includes but is not limited to beta radiation Ford effect, beta radiation photovoltaic effect and dual effect nuclear battery, the nuclear battery is located in the cavity, and the nuclear battery is interconnected with the outside through the inner circuit inside the single nuclear battery integrated substrate;

[0012] The nuclear battery is composed of a radiation source layer, a pin junction, a substrate layer and a buffer layer. A P electrode and an N electrode are arranged on the nuclear battery. The P electrode and the N electrode on the nuclear battery are on the same side or on both sides.

[0013] The inner lead is a thin copper lead.

[0014] Preferably, the main shell and the shell cover can set the electrode positions according to the series-parallel configuration of the nuclear battery.

[0015] Preferably, when the nuclear battery is a series structure, a metal negative electrode is embedded in the middle of the bottom layer of the main shell, and the metal negative electrode is a rectangular structure stacked up and down and is coaxially arranged with the main shell, and a positive terminal is arranged on the shell cover, one end of an inner lead is connected to a welding pad on the upper surface of a single nuclear battery integrated substrate on the top layer, and the other end is connected to the positive terminal on the shell cover, and the single nuclear battery integrated substrate on the bottom layer is fixed to the metal negative electrode by conductive glue.

[0016] Preferably, when the nuclear battery is a parallel structure, the bottom layer of the main shell is a solid structure, the shell cover is provided with positive and negative terminals, one end of the two inner leads are respectively connected to the two-pole welding pads on the upper surface of the top single nuclear battery integrated substrate, and the other end is connected to the positive and negative terminals on the shell cover, and the nuclear battery integrated substrate stacking structure is fixed to the main shell by an adhesive material.

[0017] Preferably, a strip-shaped insulating layer is integrally formed in the middle of the shell cover to separate the positive and negative terminals on the shell cover.

[0018] Preferably, the single core battery integrated substrate is made by a lamination method, and the base material of the single elementary substrate is a glass fiber reinforced organic material, including but not limited to FR-4, RXP-1, and RXP-4.

[0019] Preferably, when the nuclear battery is a series structure, the single nuclear battery integrated substrate has two layers, and the thickness of the upper elementary substrate is greater than that of the lower elementary substrate.

[0020] Preferably, when the nuclear battery is in a parallel structure, the single nuclear battery integrated substrate has three layers, and the thickness of the topmost elementary substrate is greater than the thickness of the other two elementary substrates.

[0021] Preferably, when the P electrode and the N electrode on the nuclear battery are located on one side, the P electrode and the N electrode are wire-bonded to the pad in the cavity using copper wires.

[0022] Preferably, when the P electrode and the N electrode on the nuclear battery are located on both sides, the P electrode and the pad are wire-bonded with copper wire, and the N electrode and the pad are bonded with conductive glue.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] 1. Since the energy density of a single β-radiation Ford effect, β-radiation photovoltaic effect and dual-effect nuclear battery is high, but the power is low, the utility model obtains a nuclear battery with higher power by connecting multiple nuclear batteries in series and parallel, so as to meet the application requirements of higher power.

[0025] 2. The utility model realizes the electrical connection of the nuclear battery through several cavities on the nuclear battery integrated substrate. Since the glass fiber reinforced organic material has high mechanical strength and high thermal conductivity, it can play a certain role in protecting and dissipating heat for the nuclear battery. In addition, the utility model has a multi-layer superimposed structure, and the failure of a single or single-layer nuclear battery does not affect the operation of the remaining nuclear batteries, thereby increasing the service life and reliability of the nuclear battery.

[0026] 3. The utility model has a multi-layer stacking structure, and a single nuclear battery integrated substrate can also accommodate and connect a number of nuclear batteries, so it can greatly save the space occupied by multiple nuclear batteries, reduce the overall volume of nuclear batteries, and improve the packaging integration of nuclear batteries.

[0027] 4. The utility model can realize the series connection and parallel connection of nuclear batteries by changing the connection direction of a single nuclear battery integrated substrate and the upper and lower nuclear battery integrated substrates. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall axial section of a parallel packaging structure of nuclear batteries based on the β radiation Ford effect, the β radiation photovoltaic effect and the dual effect of the utility model;

[0029] Figure 2 It is a schematic diagram of the overall axial section of a serial packaging structure of nuclear batteries based on the β radiation Ford effect, the β radiation photovoltaic effect and the dual effect of the utility model.

[0030] Figure 3 It is a schematic diagram of the axial section of the main shell when the internal nuclear batteries are connected in parallel.

[0031] Figure 4 This is a top view of the main shell when the internal nuclear batteries are connected in parallel.

[0032] Figure 5 This is a schematic diagram of the axial section of the main shell when the internal nuclear batteries are connected in series.

[0033] Figure 6 This is a top view of the main shell when the internal nuclear batteries are connected in series.

[0034] Figure 7 This is a top view of the shell cover when the internal nuclear batteries are connected in parallel.

[0035] Figure 8 This is a top view of the shell cover when the internal nuclear batteries are connected in series.

[0036] Fig. 9 It is a schematic diagram of the axial section of the nuclear battery integrated substrate structure with a single nuclear battery.

[0037] Fig.10 It is a schematic diagram of the axial section of the nuclear battery integrated substrate structure with multiple nuclear batteries.

[0038] Fig.11 Schematic diagram of the axial cross-section of a nuclear battery with electrodes located on the upper and lower sides.

[0039] Fig.12 This is a schematic diagram of the axial cross-section of a nuclear battery with electrodes located on the same upper and lower sides.

[0040] Fig.13 A top view of a single nuclear battery integrated substrate.

[0041] Fig.14 This is an example diagram of the inner layer circuit of the nuclear battery integrated substrate.

[0042] In the figure: 1. main shell; 2. shell cover; 3. solder pad; 4. single nuclear battery integrated substrate; 5. nuclear battery integrated substrate stacking structure; 6. nuclear battery; 7. bump solder ball; 8. adhesive material; 9. insulating layer; 10. positive and negative terminals; 11. positive terminal; 12. conductive glue; 13. metal negative electrode; 14. inner layer circuit; 15. P electrode; 16. N electrode; 17. radiation source layer; 18. pin junction; 19. substrate layer; 20. buffer layer; 21. cavity. DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0044] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The utility model provides a technical solution:

[0047] Embodiment 1

[0048] A series-parallel packaging structure of nuclear batteries based on β radiation Ford effect, β radiation photovoltaic effect and dual effect, please refer to Figure 1 , including a battery protective shell, a nuclear battery integrated substrate laminate structure 5, a nuclear battery 6 and an inner lead. The battery protective shell is composed of a main shell 1 and a shell cover 2. The bottom of the nuclear battery integrated substrate laminate structure 5 is fixedly bonded with an adhesive material 8, and the nuclear battery integrated substrate laminate structure 5 is fixed to the main shell 1 through the adhesive material 8; the inner lead is a thin copper lead.

[0049] See also Figure 3-7 and Figure 7 The main shell 1 is an inner hollow cubic thin-walled structure, the inner cavity volume of the main shell 1 is adapted to the volume of the nuclear battery integrated substrate laminated structure 5, the top of the main shell 1 is a two-step stepped structure, the bottom of the shell cover 2 is embedded in the two-step stepped structure at the top of the main shell 1 and bonded by an adhesive material 8, and the adhesive material 8 is a polymer plastic; the nuclear battery integrated substrate laminated structure 5 is arranged in the main shell 1, and the gap between the nuclear battery integrated substrate laminated structure 5 and the main shell 1 is filled with epoxy resin, the nuclear battery integrated substrate laminated structure 5 is formed by stacking and welding a plurality of identical single nuclear battery integrated substrates 4 placed in a nuclear battery 6, and the single nuclear battery integrated substrates 4 are all multi-layer boards; an inner layer circuit 14 is arranged inside the single nuclear battery integrated substrate 4, a plurality of cavities 21 used in conjunction with the nuclear battery 6 are arranged on the single nuclear battery integrated substrate 4, a plurality of through holes are arranged on the single nuclear battery integrated substrate 4, and the through holes are filled with Conductive metal, a plurality of pads 3 are arranged on the upper surface of the single nuclear battery integrated substrate 4, and a plurality of pads 3 and bump solder balls 7 are arranged on the lower surface of the single nuclear battery integrated substrate 4, the bump solder balls 7 and the pads 3 are aligned with the through holes on the corresponding layers, and the single nuclear battery integrated substrates 4 of the upper and lower adjacent layers are electrically interconnected through the pads 3 and the bump solder balls 7; the bottom layer of the main shell 1 is a solid structure, and the shell cover 2 is provided with positive and negative terminals 10, one end of the two inner leads is respectively connected to the two-pole pads 3 on the upper surface of the top single nuclear battery integrated substrate 4, and the other end is connected to the positive and negative terminals 10 on the shell cover 2, and the nuclear battery integrated substrate stacking structure 5 is fixed to the main shell by an adhesive material 8; a strip-shaped insulating layer 9 is integrally formed in the middle of the shell cover 2, which is used to separate the positive and negative terminals 10 on the shell cover 2; the single nuclear battery integrated substrate 4 is three-layered, and the thickness of the topmost elementary substrate is greater than the thickness of the other two elementary substrates;

[0050] Please refer to the attached Figure 9-14The single nuclear battery integrated substrate 4 is provided with an inner layer circuit 14, the single nuclear battery integrated substrate 4 is provided with a plurality of cavities 21 used in conjunction with the nuclear battery 6, the single nuclear battery integrated substrate 4 is provided with a plurality of through holes, and the through holes are filled with conductive metal, the upper surface of the single nuclear battery integrated substrate 4 is provided with a plurality of pads 3, and the lower surface of the single nuclear battery integrated substrate 4 is provided with a plurality of pads 3 and bump solder balls 7, the bump solder balls 7 and the pads 3 are aligned with the through holes on the corresponding layers, and the single nuclear battery integrated substrates 4 of the upper and lower adjacent layers are electrically interconnected through the pads 3 and the bump solder balls 7; the single nuclear battery integrated substrate 4 It is manufactured by lamination method, the base material of a single elementary substrate is glass fiber reinforced organic material, including but not limited to FR-4, RXP-1, RXP-4; a single nuclear battery integrated substrate 4 is three-layered, and the thickness of the top elementary substrate is greater than the thickness of the other two elementary substrates; when the P electrode 15 and the N electrode 16 on the nuclear battery 6 are located on one side, the P electrode 15 and the N electrode 16 are wire-bonded to the pad 3 in the cavity with copper wire; when the P electrode 15 and the N electrode 16 on the nuclear battery 6 are located on both sides, the P electrode 15 and the pad 3 are wire-bonded with copper wire, and the N electrode 16 and the pad 3 are bonded with conductive glue 12.

[0051] The manufacturing method of the above-mentioned series-parallel packaging structure of nuclear batteries based on β radiation Ford effect, β radiation photovoltaic effect and dual effect is as follows:

[0052] S1: Select a glass fiber reinforced organic material board of a certain material, a glass fiber reinforced organic material board as the central element substrate, cover both sides with thin copper foil, and then form a single nuclear battery integrated substrate 4 inner circuit 14 and pad 3 by etching. Before etching, the inner circuit 14 and pad 3 need to be designed using corresponding circuit design software.

[0053] S2: A copper foil with a certain thickness for forming the external circuit of a single nuclear battery integrated substrate 4 is selected for bonding with resin, with a Ni-P alloy layer with sufficient strength on the top, and another copper layer on the Ni-P alloy layer, which is combined into a composite metal foil, and only the unnecessary part of the copper foil bonded with the resin is etched away, and the single nuclear battery integrated substrate forms an external circuit and a pad 3, and its circuit and pad structure are not unique. A heat-hardened glass fiber reinforced organic material is formed on the surface of the etched circuit as a material for a multilayer board.

[0054] S3: Select two or more structures, heat and pressurize the heat-hardened glass fiber reinforced organic material and the central element substrate together, and then remove the upper copper and Ni-P alloy layers to form a single nuclear battery integrated substrate 4;

[0055] S4: According to the circuit pattern, a through hole is made on the single-core battery integrated substrate 4 by using a laser, and filled with a conductive metal such as copper, so that the internal circuit of the single-core battery integrated substrate is connected with the external circuit.

[0056] S5: Several cavities 21 larger than the nuclear battery 6 are made on the uppermost elementary substrate by plasma etching or laser etching. The number and position of the cavities 21 made should be the same and symmetrical on the left and right sides of the uppermost elementary substrate. The inner circuit 14 of the nuclear battery integrated substrate at the bottom of the cavity 21 needs to be nickel plated or immersively gold to prevent damage to the bottom circuit and pad during plasma etching or laser etching.

[0057] S6: After the nuclear battery 6 is connected to the inner layer circuit 14 of the nuclear battery integrated substrate, the gap between the chip and the cavity needs to be filled with organic filling materials and engineering adhesive materials, such as epoxy resin, silicone, etc. The organic filling materials and engineering adhesive materials play a role in fixing, protecting and dissipating heat for the nuclear battery.

[0058] S7: Clean the surface of the single-core battery integrated substrate 4, purchase a number of bump solder balls 7, and apply a proper amount of solder paste to the bottom of the through hole of the base substrate at the bottom of the single-core battery integrated substrate 4. The solder paste helps the solder balls 7 to adhere and provide a good welding connection.

[0059] S8: Use a hot air nozzle to heat the solder paste to melt it and form a liquid. The control of temperature and wind force is very important to ensure that the solder paste melts evenly and does not burn, and to ensure that the substrate is not damaged. Place the solder ball 7 at the bottom of the through hole, usually done manually or automatically. Ensure that the solder ball 7 is evenly distributed on the solder paste, and wait for the solder paste and solder ball 7 to solidify. Clean the surface of the single nuclear battery integrated substrate to remove any residual solder paste or impurities, and conduct appropriate inspection and testing

[0060] S9: Align the bump solder 7 on the upper layer and the pad 3 on the lower layer of a plurality of identical single nuclear battery integrated substrates 4 into a plurality of nuclear batteries 6, place them in the same direction, and stack them up and down, and realize the electrical connection of each layer of the nuclear battery integrated substrate by reflow soldering or laser welding. If reflow soldering is used, the welding temperature of the bump solder 7 and the pad 3 needs to be increased from top to bottom, and the conductive glue or adhesive material at the connection of the nuclear battery will not be melted, so as to improve the overall stability, thereby forming a nuclear battery integrated substrate stacking structure 5. After the welding is completed, the gaps between the single nuclear battery integrated substrates can be filled with organic fillers to reduce the mismatch of thermal expansion coefficients during welding and improve the structural stability;

[0061] S10: Place the nuclear battery integrated substrate stacking structure 5 into the main shell 1. The inner leads are thin copper leads. One end of the two inner leads are respectively connected to the two-pole welding pads 3 on the upper surface of the top nuclear battery integrated substrate, and the other end is connected to the positive and negative terminals 10 on the shell cover. The nuclear battery integrated substrate stacking structure 5 is fixed to the main shell 1 by an adhesive material.

[0062] S11: Fill the gap between the main shell 1 cavity and the nuclear battery integrated substrate stacking structure 5 with epoxy resin, embed the shell cover 2 into the two-step structure of the main shell 1, and connect it to the main shell 1 with adhesive material to complete the entire packaging process.

[0063] Embodiment 2

[0064] A series-parallel packaging structure of nuclear batteries based on β radiation Ford effect, β radiation photovoltaic effect and dual effect, please refer to Figure 2 , including a battery protective shell, a nuclear battery integrated substrate laminate structure 5, a nuclear battery 6 and an inner lead, the battery protective shell is composed of a main shell 1 and a shell cover 2, the bottom of the nuclear battery integrated substrate laminate structure 5 is fixedly bonded with an adhesive material 8, and the nuclear battery integrated substrate laminate structure 5 is fixed to the main shell 1 through the adhesive material 8;

[0065] See also Figure 5-6 and Figure 8 The main shell 1 is a hollow cubic thin-walled structure. The inner cavity volume of the main shell 1 is adapted to the volume of the nuclear battery integrated substrate laminated structure 5. The top of the main shell 1 is a two-step stepped structure. The bottom of the shell cover 2 is embedded in the two-step stepped structure at the top of the main shell 1 and bonded by an adhesive material 8. The adhesive material 8 is a polymer plastic. The nuclear battery integrated substrate laminated structure 5 is arranged in the main shell 1, and the gap between the nuclear battery integrated substrate laminated structure 5 and the main shell 1 is filled with epoxy resin. The nuclear battery integrated substrate laminated structure 5 consists of a plurality of identical layers placed in the main shell 1. The single nuclear battery integrated substrates 4 of the nuclear battery 6 are stacked and welded, and the single nuclear battery integrated substrates 4 are all multi-layer boards; a metal negative electrode 13 is embedded and installed in the middle of the bottom layer of the main shell 1, and the metal negative electrode 13 is a rectangular structure stacked up and down and is coaxially arranged with the main shell 1, and a positive terminal 11 is arranged on the shell cover 2, one end of an inner lead is connected to a welding pad 3 on the upper surface of the top single nuclear battery integrated substrate 4, and the other end is connected to the positive terminal 11 on the shell cover 2, and the bottom single nuclear battery integrated substrate 4 is fixed to the metal negative electrode 13 by a conductive glue 12;.

[0066] See also Figure 9-14The single nuclear battery integrated substrate 4 is provided with an inner circuit 14, the single nuclear battery integrated substrate 4 is provided with a plurality of cavities 21 used in conjunction with the nuclear battery 6, the single nuclear battery integrated substrate 4 is provided with a plurality of through holes, and the through holes are filled with conductive metal, the upper surface of the single nuclear battery integrated substrate 4 is provided with a plurality of pads 3, and the lower surface of the single nuclear battery integrated substrate 4 is provided with a plurality of pads 3 and bump solder balls 7, the bump solder balls 7 and the pads 3 are aligned with the through holes on the corresponding layers, and the single nuclear battery integrated substrates 4 of the upper and lower adjacent layers are electrically interconnected through the pads 3 and the bump solder balls 7; the single nuclear battery integrated The substrate 4 is made by a lamination method, and the base material of a single elementary substrate is a glass fiber reinforced organic material, including but not limited to FR-4, RXP-1, and RXP-4; a single nuclear battery integrated substrate 4 is two-layered, and the thickness of the upper elementary substrate is greater than that of the lower elementary substrate; when the P electrode 15 and the N electrode 16 on the nuclear battery 6 are located on one side, the P electrode 15 and the N electrode 16 are wire-bonded to the pad 3 in the cavity with copper wire; when the P electrode 15 and the N electrode 16 on the nuclear battery 6 are located on both sides, the P electrode 15 and the pad 3 are wire-bonded with copper wire, and the N electrode 16 and the pad 3 are bonded with a conductive adhesive 12.

[0067] The above-mentioned method for manufacturing the series-parallel packaging structure of nuclear batteries based on β-radiation Ford effect, β-radiation photovoltaic effect and dual-effect is the same as that of implementation example 1 except for the following differences.

[0068] 1. When a single nuclear battery integrated substrate 4 is stacked, it is not in exactly the same direction, but the upper and lower layers of each layer are obtained by rotating the layer 180 degrees in the plane.

[0069] 2. The inner circuit 14 of a single nuclear battery integrated substrate 4 should connect the nuclear batteries on the same integrated substrate in series.

[0070] 3. Only one side of the pad 3 or bump solder ball 7 of the single nuclear battery integrated substrate 4 is connected to the through hole, and the pad 3 or bump solder ball 7 on the other side plays a supporting and stabilizing role. The top of the nuclear battery integrated substrate stacked structure 5 has a pad 3 on the upper surface of the single nuclear battery integrated substrate 4, and a pad 3 and bump solder ball 7 on the lower surface. The bottom single nuclear battery integrated substrate 4 has a pad 3 on the upper surface, and the copper foil on the lower surface is not etched, and is interconnected with the bottom electrode of the main shell 1 with a conductive glue 12.

[0071] 4. One end of an inner lead is connected to a welding pad 3 on the upper surface of the top nuclear battery integrated substrate, and the other end is connected to the corresponding terminal on the shell cover 2. There is only one terminal on the shell cover, and the other is located at the bottom of the main shell, and is fixed to the electrode on the lower surface of the bottom nuclear battery integrated substrate by conductive glue 12.

[0072] 5. The center of the bottom layer of the main shell 1 has a hollow structure of coaxially stacked rectangular parallelepipeds, and a corresponding coaxially stacked rectangular parallelepiped metal electrode is embedded inside as a metal negative electrode 13.

[0073] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A series-parallel packaging structure of nuclear batteries based on β radiation Ford effect, β radiation photovoltaic effect and dual effect, characterized in that: The invention comprises a battery protective shell, a nuclear battery integrated substrate laminate structure (5), a nuclear battery (6) and an inner lead, wherein the battery protective shell is composed of a main shell (1) and a shell cover (2), an adhesive material (8) is fixedly bonded to the bottom of the nuclear battery integrated substrate laminate structure (5), and the nuclear battery integrated substrate laminate structure (5) is fixed to the main shell (1) by the adhesive material (8); The main shell (1) is an inner hollow cubic thin-walled structure, the inner cavity volume of the main shell (1) is compatible with the volume of the nuclear battery integrated substrate stacking structure (5), the top of the main shell (1) is a two-step stepped structure, the bottom of the shell cover (2) is embedded in the two-step stepped structure at the top of the main shell (1) and bonded by an adhesive material (8), and the adhesive material (8) is a polymer plastic; The nuclear battery integrated substrate stacking structure (5) is arranged in the main housing (1), and the gap between the nuclear battery integrated substrate stacking structure (5) and the main housing (1) is filled with epoxy resin, and the nuclear battery integrated substrate stacking structure (5) is formed by stacking and welding a plurality of identical single nuclear battery integrated substrates (4) placed in nuclear batteries (6), and the single nuclear battery integrated substrates (4) are all multilayer boards; The single nuclear battery integrated substrate (4) is provided with an inner layer circuit (14), the single nuclear battery integrated substrate (4) is provided with a plurality of cavities (21) used in conjunction with the nuclear battery (6), the single nuclear battery integrated substrate (4) is provided with a plurality of through holes, and the through holes are filled with conductive metal, the upper surface of the single nuclear battery integrated substrate (4) is provided with a plurality of pads (3), and the lower surface of the single nuclear battery integrated substrate (4) is provided with a plurality of pads (3) and convex solder balls (7), the convex solder balls (7) and the pads (3) are aligned with the through holes on the corresponding layer, and the single nuclear battery integrated substrates (4) of two adjacent layers above and below are electrically interconnected through the pads (3) and the convex solder balls (7); The nuclear battery (6) includes but is not limited to beta radiation Ford effect, beta radiation photovoltaic effect and dual effect nuclear battery, the nuclear battery (6) is located in the cavity (21), and the nuclear battery (6) is interconnected with the outside through the inner circuit (14) inside the single nuclear battery integrated substrate (4); The nuclear battery (6) is composed of a radiation source layer (17), a pin junction (18), a substrate layer (19) and a buffer layer (20); a P electrode (15) and an N electrode (16) are arranged on the nuclear battery (6); the P electrode (15) and the N electrode (16) on the nuclear battery (6) are on the same side or on both sides; The inner lead is a thin copper lead.

2. The series-parallel packaging structure of nuclear batteries based on β-radiation Ford effect, β-radiation photovoltaic effect and dual effect according to claim 1, characterized in that: The main shell (1) and the shell cover (2) can set the electrode positions according to the series-parallel configuration of the nuclear battery (6).

3. The series-parallel packaging structure of nuclear batteries based on β-radiation Ford effect, β-radiation photovoltaic effect and dual effect according to claim 2, characterized in that: When the nuclear battery (6) is a series structure, a metal negative electrode (13) is embedded in the middle of the bottom layer of the main shell (1), and the metal negative electrode (13) is a rectangular parallelepiped structure stacked up and down and is coaxially arranged with the main shell (1). A positive terminal (11) is arranged on the shell cover (2), one end of an inner lead is connected to a welding pad (3) on the upper surface of a single nuclear battery integrated substrate (4) on the top layer, and the other end is connected to the positive terminal (11) on the shell cover (2), and the single nuclear battery integrated substrate (4) on the bottom layer is fixed to the metal negative electrode (13) by a conductive adhesive (12).

4. The series-parallel packaging structure of nuclear batteries based on β-radiation Ford effect, β-radiation photovoltaic effect and dual effect according to claim 2, characterized in that: When the nuclear battery (6) is a parallel structure, the bottom layer of the main shell (1) is a solid structure, the shell cover (2) is provided with positive and negative terminals (10), one end of two inner leads is respectively connected to the two-pole welding pads (3) on the upper surface of the top single nuclear battery integrated substrate (4), and the other end is connected to the positive and negative terminals (10) on the shell cover (2), and the nuclear battery integrated substrate stacking structure (5) is fixed to the main shell by an adhesive material (8).

5. The series-parallel packaging structure of nuclear batteries based on β-radiation Ford effect, β-radiation photovoltaic effect and dual effect according to claim 4, characterized in that: A strip-shaped insulating layer (9) is integrally formed in the middle of the shell cover (2) and is used to separate the positive and negative terminals (10) on the shell cover (2).

6. The series-parallel packaging structure of nuclear batteries based on β-radiation Ford effect, β-radiation photovoltaic effect and dual effect according to claim 1, characterized in that: The single core battery integrated substrate (4) is manufactured by a lamination method, and the base material of the single elementary substrate is a glass fiber reinforced organic material, including but not limited to FR-4, RXP-1, and RXP-4.

7. The series-parallel packaging structure of nuclear batteries based on β-radiation Ford effect, β-radiation photovoltaic effect and dual effect according to claim 6, characterized in that: When the nuclear battery (6) is a series structure, the single nuclear battery integrated substrate (4) is two layers, and the thickness of the upper layer elementary substrate is greater than that of the lower layer elementary substrate.

8. The series-parallel packaging structure of nuclear batteries based on β-radiation Ford effect, β-radiation photovoltaic effect and dual effect according to claim 6, characterized in that: When the nuclear battery (6) is in a parallel structure, the single nuclear battery integrated substrate (4) has three layers, and the thickness of the uppermost elementary substrate is greater than the thickness of the other two elementary substrates.

9. The series-parallel packaging structure of nuclear batteries based on β-radiation Ford effect, β-radiation photovoltaic effect and dual effect according to claim 1, characterized in that: When the P electrode (15) and the N electrode (16) on the nuclear battery (6) are located on one side, the P electrode (15) and the N electrode (16) are wire-bonded to the pad (3) in the cavity using copper wires.

10. The series-parallel packaging structure of nuclear batteries based on β radiation Ford effect, β radiation photovoltaic effect and dual effect according to claim 1, characterized in that: When the P electrode (15) and the N electrode (16) on the nuclear battery (6) are located on both sides, the P electrode (15) and the pad (3) are wire-bonded using copper wires, and the N electrode (16) and the pad (3) are bonded using conductive adhesive (12).

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