A circuit battery integrated device and a preparation method thereof

Abstract

The application discloses a kind of circuit battery integration integrated device and preparation method thereof, it is related to battery technical field, copper-clad printed circuit board is designed with battery preparation area, the battery preparation area includes tab area, the tab area includes positive tab area and negative tab area, positive tab area and negative tab area are respectively as positive tab and negative tab, the battery preparation area is provided with positive tab, negative tab, and the blank side of positive tab and negative tab is as positive tab and negative tab, and is connected with positive tab area and negative tab area respectively, to realize the connection of battery and circuit, without preparing tab additionally, effectively reduce battery preparation cost, improve the overall energy density and space utilization of battery simultaneously.

Description

Technical Field

[0001] This invention relates to battery technology, and more particularly to an integrated circuit-battery device and its fabrication method. Background Technology

[0002] The development of IoT technology has placed higher demands on IoT terminal devices, requiring longer lifespans within limited space to reduce deployment and maintenance costs. This necessitates miniaturization and high integration of these devices. Currently, most IoT terminals adopt a split design, with the circuitry and battery completely separated and connected by lead wires, resulting in low overall energy density and volume utilization of the battery. Furthermore, existing integrated structural designs and technologies are primarily geared towards outdoor, non-rechargeable applications, maximizing battery capacity through ultra-thick electrodes. However, for rechargeable applications, using the same methods to fabricate thick electrodes leads to a sharp decline in the battery's electrochemical performance, making charging and discharging impossible. Therefore, new integrated structural solutions are needed for rechargeable applications. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated circuit-battery device and its fabrication method, which solves the problem of low overall energy density and space utilization of batteries caused by the separate design of circuits and batteries in the prior art.

[0004] This invention solves the above problems through the following technical solution: an integrated circuit and battery device, wherein a copper-clad printed circuit board is designed as a circuit area, a battery fabrication area, and a mounting area. The circuit area is used for the design of integrated circuits and the mounting of components. The battery fabrication area includes a tab area, which includes a positive tab area and a negative tab area. One side of the tab area extends out of the battery fabrication area and connects to the circuit area, and one side of the battery fabrication area connects to the mounting area, which is used for mounting. The positive tab area and the negative tab area are respectively... As positive and negative electrode tabs, a positive electrode sheet, a negative electrode sheet, and a separator are provided on the battery fabrication area. One end of the positive and negative electrode sheets is left blank, serving as the positive and negative electrode tabs, respectively. The positive and negative electrode tabs are welded to the positive and negative electrode tab areas, respectively. The separator separates the positive and negative electrode sheets. The positive electrode sheet, negative electrode sheet, and separator are wound around the circuit fabrication area to form a wound battery cell. The wound battery cell is provided with a packaging shell for encapsulating the wound battery cell. The packaging shell is a closed space filled with electrolyte.

[0005] Furthermore, the battery fabrication area has a positive electrode tab area and a negative electrode tab area on both sides. The positive electrode tab area is covered with conductive foil or coated with conductive paste. The battery fabrication area other than the tab area is coated with a sealing coating.

[0006] Furthermore, there are two separators. One end of the separator is fixed to the positive electrode tab area or the negative electrode tab area with tape. The battery preparation area acts as a winding needle. The positive electrode sheet, the negative electrode sheet and the separator are wound clockwise or counterclockwise around the battery preparation area as the axis. Tape is attached to the end, and then hot-pressed to form a wound battery cell.

[0007] Furthermore, tab adhesive is fixed at the connection points between the battery manufacturing area and the circuit area and the positioning area, and the tab adhesive wraps around the connection point.

[0008] Furthermore, the packaging shell is made of aluminum-plastic film.

[0009] This invention also provides a method for fabricating an integrated circuit-battery device, comprising the following steps:

[0010] S1. Overall structural design: The copper-clad printed circuit board is designed as a circuit area, a battery fabrication area, and a mounting area. Integrated circuits and components are designed and installed in the circuit area. The two sides of the battery fabrication area are designated as positive electrode tab areas and negative electrode tab areas. Conductive foil is pasted or conductive paste is applied to the positive electrode tab area. A sealing coating is applied to the areas of the battery fabrication area other than the tab areas. The positive electrode tab area and the negative electrode tab area are respectively led out to the circuit area as positive electrode tabs and negative electrode tabs.

[0011] S2. Prepare positive and negative electrode sheets. Mix and disperse the positive active material, conductive agent, binder, and solvent in a specific ratio to form a positive electrode slurry. Mix and disperse the negative active material, conductive agent, binder, and solvent in a specific ratio to form a negative electrode slurry. Coat the positive and negative electrode slurries evenly onto a foil material using a coating method. After drying, prepare the positive and negative electrode sheets respectively. Roll press the positive and negative electrode sheets to compact them. Die-cut and slit the positive and negative electrode sheets. Leave one end of the positive and negative electrode sheets blank to serve as the positive and negative electrode tabs, respectively.

[0012] S3. Prepare a wound cell by welding the positive electrode and negative electrode to the positive electrode tab area and the negative electrode tab area; cut two separators and fix the separators to the positive or negative electrode tab area with tape, and the separators separate the positive electrode; wind the positive electrode and negative electrode with the battery preparation area as the axis clockwise or counterclockwise, attach tape to the end, and further heat press to form a wound cell;

[0013] S4. Electrolyte injection and packaging: Cut two strips of electrode adhesive and fix them to the connection points of the battery preparation area, circuit area, and positioning area, respectively. The electrode adhesive is wrapped around the connection point. Prepare an aluminum-plastic film packaging shell, insert the battery preparation area into the packaging shell, and heat-seal both ends where the electrode adhesive is placed. After injecting electrolyte from the unsealed side of the aluminum-plastic film, vacuum is drawn, and this side is pre-sealed, formed, and then sealed again to complete the battery preparation.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0015] (1) By leaving one end of the positive electrode and the negative electrode blank as the positive electrode tab and the negative electrode tab, and connecting them to the positive electrode tab area and the negative electrode tab area respectively, the positive electrode tab and the negative electrode tab are led out to the circuit area, realizing the connection between the battery and the circuit. There is no need to prepare the tab separately, which effectively reduces the battery manufacturing cost and improves the overall energy density of the battery and the space utilization of the terminal device.

[0016] (2) This invention proposes a novel structural design scheme and manufacturing method for terminal devices that include circuits and batteries, such as Internet of Things devices. Unlike the existing design schemes where the circuit part and the battery part are completely separated, this invention achieves the integration of device components by sharing the circuit and battery structures, thereby reducing the overall size of the device and improving the overall integration.

[0017] (3) Because the circuit and battery structures are shared, there is no need to purchase batteries externally, which reduces production costs. This integrated design also simplifies the manufacturing process, further improves production efficiency, and reduces overall costs.

[0018] (4) Due to the reduction in size, a larger capacity battery can be fabricated in the same volume, thereby improving the lifespan of the device.

[0019] Overall, this invention provides an innovative design scheme and manufacturing method that enables the sharing of circuits and batteries in terminal devices, improving device integration, reducing costs, and extending lifespan. This is of great significance for the development of fields such as IoT devices. Attached Figure Description

[0020] Figure 1 This is a planar schematic diagram of the present invention.

[0021] Figure 2 This is the left view of the present invention.

[0022] Figure 3 This is a diagram illustrating the stacking effect of the positive electrode, negative electrode, and separator of the present invention.

[0023] Wherein, 1-Circuit area 1; 2-Battery preparation area; 3-Taper area; 4-Taper adhesive; 5-Aluminum-plastic film; 6-Wound cell; 7-Separator; 8-Positive electrode sheet; 9-Negative electrode sheet. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, not all embodiments, and the implementation of this invention is not limited thereto. Based on the embodiments of this invention, all other implementations obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0025] Example 1:

[0026] Combined with appendix Figure 1-3 As shown, an integrated circuit-battery device is disclosed, comprising a copper-clad printed circuit board designed as a circuit region 1, a battery fabrication region 2, and a mounting region. The circuit region 1 is used for integrated circuit design and component mounting. The battery fabrication region 2 includes a tab region 3, which comprises a positive tab region and a negative tab region. One side of the tab region 3 extends out of the battery fabrication region 2 and connects to the circuit region 1. Another side of the battery fabrication region 2 connects to the mounting region, which is used for mounting. The positive and negative tab regions serve as the positive and negative electrodes, respectively. The battery fabrication area 2 is provided with a positive electrode 8, a negative electrode 9, and a separator 7. One end of the positive electrode 8 and the negative electrode 9 is left blank as the positive electrode tab and the negative electrode tab, respectively. The positive electrode tab and the negative electrode tab are respectively welded to the positive electrode tab area and the negative electrode tab area. The separator 7 separates the positive electrode 8 and the negative electrode 9. The positive electrode 8, the negative electrode 9, and the separator 7 are wound around the circuit fabrication area to form a wound battery cell 6. The wound battery cell 6 is provided with a packaging shell for encapsulating the wound battery cell 6. The packaging shell is a closed space filled with electrolyte.

[0027] The copper-clad printed circuit board is designed in an I-shape. The circuit design and electronic component installation in circuit area 1 are consistent with conventional devices. The narrower middle area is the battery preparation area 2. The positive electrode tab area and the negative electrode tab area 3 extend slightly to the left to connect with the circuit. The width of the electrode is slightly smaller than the upper side length of the battery preparation area 2. The slightly wider area at the right end is the locking area, which is used to prevent the positive electrode 8, the negative electrode 9 and the separator 7 from being misaligned.

[0028] Working principle:

[0029] One end of the positive electrode 8 and the negative electrode 9 is left blank as the positive electrode tab and the negative electrode tab, respectively, and connected to the positive electrode tab region and the negative electrode tab region, thereby leading the tabs out to the circuit region 1, realizing the connection between the battery and the circuit, without the need to prepare the tabs separately, improving the overall energy density of the battery and the space utilization of the device.

[0030] Example 2:

[0031] Based on Example 1, combined with Appendix Figure 1 As shown, the two sides of the battery preparation area 2 are the positive electrode tab area and the negative electrode tab area. The positive electrode tab area is covered with conductive foil or coated with conductive paste. The battery preparation area 2, except for the tab area 3, is coated with a sealing coating.

[0032] The conductive foil or paste can be made of aluminum, nickel, or silver, which have excellent conductivity, high plasticity, good oxidation resistance, and strong corrosion resistance. They are also environmentally friendly and sustainable. The sealing coating material can be made of silicone, acrylic, or polyurethane, which have advantages such as chemical resistance, anti-aging properties, good sealing performance, wear resistance, durability, and good adhesion. Therefore, they are widely used in various sealing applications.

[0033] Example 3:

[0034] Based on Example 1, combined with Appendix Figure 2 and attached Figure 3 As shown, there are two separators 7. One end of the separator 7 is fixed to the positive or negative electrode tab area with tape. The battery preparation area 2 serves as a winding needle. The positive electrode plate 8, the negative electrode plate 9 and the separator 7 are wound clockwise or counterclockwise around the battery preparation area 2 as the axis. Tape is attached to the end and then hot-pressed to form the wound cell 6.

[0035] In this process, the separator 7 is slightly wider than the electrode sheet. The positive and negative electrode sheets and the separator 7 are stacked from top to bottom on the battery preparation area 2 to form a separator / positive electrode / separator / negative electrode structure. Then, they are wound around the battery preparation area 2 in a clockwise or counterclockwise direction. Hot pressing is performed by pressing the wound core after winding through a high temperature and high pressure method, so that the separator 7 and the positive electrode sheet 8, and the separator 7 and the negative electrode sheet 9 are tightly attached together to form the wound cell 6.

[0036] Example 4:

[0037] Based on Example 3, combined with Appendix Figure 1 As shown, tab adhesive 4 is fixed at the connection between the battery preparation area and the circuit area 1 and the positioning area, and the tab adhesive 4 is wrapped around the connection of the wound cell 6.

[0038] The width of the tab adhesive 4 is slightly wider than the left side length of the battery preparation area 2. The tab adhesive 4 is an encapsulating adhesive and is made into a continuous strip. The length of the aluminum-plastic film 5 packaging shell is the same as the upper side of the battery preparation area 2. The wound cell 6 is inserted into the aluminum-plastic film 5 packaging shell. The two ends where the tab adhesive 4 is placed are heat-sealed. Electrolyte is injected from the unsealed side of the aluminum-plastic film 5. After injecting electrolyte from the unsealed side of the aluminum-plastic film 5, a vacuum is drawn, and this side is pre-sealed, formed, and then sealed again to complete the battery preparation, that is, to complete the preparation of the integrated circuit and battery device of the present invention.

[0039] Example 5:

[0040] Based on Example 1, combined with Appendix Figure 2 As shown, the packaging shell is made of aluminum-plastic film 5.

[0041] The aluminum-plastic film 5 has excellent moisture-proof and waterproof properties, which can effectively protect the internal battery components from the influence of external moisture and water; at the same time, the aluminum-plastic film 5 can also provide a certain degree of mechanical protection to prevent the battery from being physically damaged by the outside world.

[0042] Example 6:

[0043] Combined with appendix Figure 1-3 As shown, a method for fabricating an integrated circuit-battery device includes the following steps: S1, overall structural design, designing a copper-clad printed circuit board as a circuit area, a battery fabrication area, and a mounting area; designing integrated circuits and mounting components in the circuit area; designing the two sides of the battery fabrication area as positive electrode tab areas and negative electrode tab areas; attaching conductive foil or applying conductive paste to the positive electrode tab area; applying a sealing coating to the area of ​​the battery fabrication area other than the tab area 3; and leading the positive electrode tab area and negative electrode tab area to the circuit area as positive electrode tabs and negative electrode tabs, respectively.

[0044] S2. Prepare positive electrode sheet 8 and negative electrode sheet 9. Mix and disperse the positive electrode active material, conductive agent, binder and solvent in a certain proportion to form a positive electrode slurry. Mix and disperse the negative electrode active material, conductive agent, binder and solvent in a certain proportion to form a negative electrode slurry. Coat the positive and negative electrode slurries evenly onto the foil material by coating. After drying, prepare positive electrode sheet 8 and negative electrode sheet 9 respectively. Roll press the positive electrode sheet 8 and negative electrode sheet 9 to compact the electrode sheets. Cut the positive electrode sheet 8 and negative electrode sheet 9 by die cutting and slitting. Leave one end of the positive electrode sheet 8 and negative electrode sheet 9 blank to serve as the positive electrode tab and negative electrode tab respectively.

[0045] S3. Prepare the wound cell 6 by welding the positive electrode 8 and the negative electrode 9 to the positive electrode tab area and the negative electrode tab area; cut two separators 7, fix the separators 7 to the positive or negative electrode tab area with tape, and separate the positive electrode 8 with the separators 7; wind the positive electrode 8 and the negative electrode 9 clockwise or counterclockwise with the battery preparation area as the axis, attach tape to the end, and further heat press to form the wound cell 6;

[0046] S4. Electrolyte injection and packaging: Cut two tab adhesive strips 4 and fix them at the connection between the battery preparation area and the circuit area and the positioning area. The tab adhesive strip 4 is wrapped around the connection. Prepare aluminum-plastic film 5 for casing. Insert the battery preparation area into the packaging shell and heat-press the two ends where the tab adhesive strip 4 is placed. After injecting electrolyte from one side of the aluminum-plastic film 5, vacuum is drawn and this side is pre-sealed, formed, and then sealed again to complete the battery preparation.

[0047] Although the present invention has been described herein with reference to illustrative embodiments, the above embodiments are merely preferred embodiments of the present invention, and the implementation of the present invention is not limited to the above embodiments. It should be understood that those skilled in the art can devise many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. An integrated circuit-battery device, characterized in that, The copper-clad printed circuit board is designed as a circuit area, a battery fabrication area, and a mounting area. The circuit area is used for integrated circuit design and component mounting. The battery fabrication area includes a tab area, which includes a positive tab area and a negative tab area. One side of the tab area extends out of the battery fabrication area and connects to the circuit area, while the other side of the battery fabrication area connects to the mounting area for mounting. The mounting area is used for mounting. The positive and negative tab areas serve as the positive and negative tabs, respectively. A positive electrode, a negative electrode, and a separator are disposed on the preparation area. One end of the positive electrode and the negative electrode are left blank, serving as positive and negative electrode tabs, respectively. The positive and negative electrode tabs are welded to the positive electrode tab area and the negative electrode tab area, respectively. The separator separates the positive electrode and the negative electrode. The positive electrode, the negative electrode, and the separator are wound around the circuit preparation area to form a wound battery cell. The wound battery cell is provided with a packaging shell for encapsulating the wound battery cell. The packaging shell is a closed space filled with electrolyte.

2. The integrated circuit-battery device according to claim 1, characterized in that, The battery fabrication area has a positive electrode tab area and a negative electrode tab area on both sides. The positive electrode tab area is covered with conductive foil or coated with conductive paste. The battery fabrication area other than the tab area is coated with a sealing coating.

3. The integrated circuit-battery device according to claim 1, characterized in that, The separator has two parts. One end of the separator is fixed to the positive electrode tab area or the negative electrode tab area with tape. The battery preparation area acts as a winding needle. The positive electrode sheet, the negative electrode sheet and the separator are wound clockwise or counterclockwise around the battery preparation area as the axis. Tape is attached to the end and then hot-pressed to form a wound cell.

4. The integrated circuit-battery device according to claim 3, characterized in that, The connection points between the battery manufacturing area and the circuit area and the positioning area are respectively fixed with tab adhesive, and the tab adhesive is wrapped around the connection point.

5. The integrated circuit-battery device according to claim 1, characterized in that, The packaging shell is made of aluminum-plastic film.

6. A method for fabricating an integrated circuit-battery device, characterized in that, Includes the following steps: S1. Overall structural design: The copper-clad printed circuit board is designed as a circuit area, a battery fabrication area, and a mounting area. Integrated circuits and components are designed and installed in the circuit area. The two sides of the battery fabrication area are designated as positive electrode tab areas and negative electrode tab areas. Conductive foil is pasted or conductive paste is applied to the positive electrode tab area. A sealing coating is applied to the areas of the battery fabrication area other than the tab areas. The positive electrode tab area and the negative electrode tab area are respectively led out to the circuit area as positive electrode tabs and negative electrode tabs. S2. Prepare positive and negative electrode sheets. Mix and disperse the positive active material, conductive agent, binder, and solvent in a specific ratio to form a positive electrode slurry. Mix and disperse the negative active material, conductive agent, binder, and solvent in a specific ratio to form a negative electrode slurry. Coat the positive and negative electrode slurries evenly onto a foil material using a coating method. After drying, prepare the positive and negative electrode sheets respectively. Roll press the positive and negative electrode sheets to compact them. Die-cut and slit the positive and negative electrode sheets. Leave one end of the positive and negative electrode sheets blank to serve as the positive and negative electrode tabs, respectively. S3. Prepare a wound battery cell by welding the positive electrode sheet and the negative electrode sheet to the positive electrode tab area and the negative electrode tab area; cut two separators and fix the separators to the positive or negative electrode tab area with tape, the separators separating the positive electrode sheet; wind the positive electrode sheet and the negative electrode sheet clockwise or counterclockwise with the battery preparation area as the axis, attach tape to the end, and further heat press to form a wound battery cell; S4. Liquid injection and encapsulation: Cut two tab adhesive strips and fix the tab adhesive strips to the connection points of the battery preparation area, circuit area, and positioning area, respectively, with the tab adhesive strips wrapped around the connection points. Prepare an aluminum-plastic film packaging shell, insert the battery preparation area into the packaging shell, and heat-seal the two ends where the tab adhesive is placed. After injecting electrolyte into the unsealed side of the aluminum-plastic film, a vacuum is drawn, and this side is pre-sealed, formed, and then re-sealed to complete the battery preparation.

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