Ultrathin battery module

Abstract

The utility model discloses an ultrathin battery module which comprises a fixed frame, a control circuit, a plurality of battery cells, a connecting wire and a plurality of filling bodies, the plurality of battery cells are arranged in the fixed frame, the plurality of filling bodies are filled in gaps between the plurality of battery cells and the fixed frame, and the connecting wire is connected with the control circuit. The plurality of battery cells are electrically connected with the control circuit through the connecting wires, and the thickness of the fixed frame is the same as that of the battery cells. According to the utility model, the fixed frame, the battery core, the connecting wire, the control circuit and the filling body are reasonably configured, so that the thin design, the stability and the safety of the battery are ensured.

Description

Technical Field

[0001] This utility model relates to the field of battery module technology, and in particular to an ultra-thin battery module. Background Technology

[0002] Batteries are an essential component of every handheld electronic product. The larger the screen, the greater the battery capacity must be; the thinner the battery, the larger the area occupied by the battery cell. To protect the battery cell, the current industry practice is to design the battery cell according to the frame size to meet the product's needs, and then use adhesive tape to attach the cell to the battery frame. This results in an extra layer of adhesive tape on both sides of the battery, unnecessarily increasing its thickness. There is also a significant thickness difference between the battery cell and the frame. For the internal space design of ultra-thin products, the thickness of internal components needs to be accurate to the micrometer level; therefore, even a reduction of 100 micrometers can significantly contribute to the structural design.

[0003] Therefore, a new solution is needed. Utility Model Content

[0004] The main objective of this invention is to provide an ultra-thin battery module.

[0005] To achieve the above objectives, this utility model provides an ultra-thin battery module, including a fixed frame, a control circuit, multiple battery cells, connecting wires, and multiple fillers. The multiple battery cells are installed in the fixed frame, and the multiple fillers fill the gaps between the multiple battery cells and the fixed frame. The multiple battery cells are electrically connected to the control circuit through the connecting wires, and the thickness of the fixed frame is the same as the thickness of the battery cells.

[0006] In the ultra-thin battery module provided by this utility model, the fixing frame includes multiple cell fixing units, the cell is installed in the cell fixing unit, and the size of the cell fixing unit is larger than the size of the cell.

[0007] In the ultra-thin battery module provided by this utility model, the inner four sides of the cell fixing unit are provided with protrusions, the protrusions abut against the cell, and the filler covers the protrusions.

[0008] In the ultra-thin battery module provided by this utility model, the height of the boss is less than the thickness of the fixing frame.

[0009] In the ultra-thin battery module provided by this utility model, the battery cell is a pouch cell.

[0010] In the ultra-thin battery module provided by this utility model, the positive electrode connecting piece and the negative electrode connecting piece of the battery cell are soldered to the control circuit through the connecting wire.

[0011] In the ultra-thin battery module provided by this utility model, the filler is formed by curing a fluid UV-curable adhesive.

[0012] The ultra-thin battery module provided by this utility model has the following beneficial effects: In the ultra-thin battery module provided by this utility model, a fixed frame supports and accommodates all other components. The thickness of the fixed frame is the same as the thickness of the battery cell, ensuring the overall thin design of the module; multiple battery cells are electrically connected to the control circuit through connecting wires, ensuring that the battery module can work normally and perform energy management; the control circuit monitors and adjusts the battery's working state, such as charging, discharging, and temperature control, ensuring battery safety and efficiency; the gap between the battery cell and the fixed frame is filled with filler, which not only helps to maintain the stability of the battery cell's position but may also have a certain protective effect; thus, the thickness of the entire module is the same as the thickness of the battery cell, making the battery module ultra-thin and suitable for use in applications where space saving is required, such as smart devices and wearable devices; this utility model ensures the thin design, stability, and safety of the battery by rationally configuring the fixed frame, battery cell, connecting wires, control circuit, and filler. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0014] Figure 1 The diagram shown is a structural diagram of the ultra-thin battery module provided by this utility model.

[0015] Figure 2 The image shown is an exploded view of the ultra-thin battery module provided by this utility model.

[0016] Figure 3 The diagram shown is a structural diagram of the fixing frame of the ultra-thin battery module provided by this utility model. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate typical embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0019] Figure 1 The diagram shown is a structural diagram of the ultra-thin battery module provided by this utility model. Figure 2 The image shown is an exploded view of the ultra-thin battery module provided by this utility model. Figure 1 and 2 As shown, the ultra-thin battery module provided by this utility model includes a fixed frame 100, a control circuit, multiple battery cells 200, connecting wires 300, and multiple fillers 400. The multiple battery cells 200 are installed in the fixed frame 100, and the multiple fillers 400 fill the gaps between the multiple battery cells 200 and the fixed frame 100. The multiple battery cells 200 are electrically connected to the control circuit through the connecting wires 300. The thickness of the fixed frame 100 is the same as the thickness of the battery cells 200. In this embodiment, a fixed frame supports and accommodates all other components. The thickness of the fixed frame is the same as the thickness of the battery cell, ensuring a thin design for the overall module. Multiple battery cells are electrically connected to the control circuit via connecting wires, ensuring the battery module can function normally and manage energy. The control circuit monitors and adjusts the battery's operating state, such as charging, discharging, and temperature control, ensuring battery safety and efficiency. A filler material fills the gaps between the battery cells and the fixed frame; this not only helps maintain the stability of the battery cells but may also provide some protection. Thus, the thickness of the entire module is the same as the thickness of the battery cells, giving the battery module an ultra-thin characteristic, suitable for applications requiring space saving, such as smart devices and wearable devices. This invention, through the rational configuration of the fixed frame, battery cells, connecting wires, control circuit, and filler material, ensures the battery's thin design, stability, and safety.

[0020] In this application, the battery cell 200, the fixing frame 100, the control circuit, and the filler 400 all adopt a modular structure. The modular design allows each component to be independently disassembled and replaced without affecting other components. Compared to traditional integrated designs, modularity makes disassembly and replacement more efficient and convenient. This is particularly important for maintenance, repair, or battery replacement. The filler 400 fills the gap between the battery cell 200 and the fixing frame 100, providing appropriate mechanical support and fixing force during disassembly. This not only prevents the battery from loosening during use but also simplifies the disassembly process. Through the design of reasonable filling materials and filling methods, cell displacement or damage is less likely during disassembly and assembly, improving the stability and safety of disassembly and assembly. The thickness of the fixing frame 100 is consistent with the thickness of the battery cell 200, making the entire battery module structure more uniform and compact, facilitating disassembly. Compared to designs with inconsistent thicknesses, which may result in loose fits or difficulty in docking during disassembly, the uniform thickness design reduces the difficulty of installation or disassembly.

[0021] Figure 3 The diagram shows the structure of the fixing frame for the ultra-thin battery module provided by this utility model. Figure 3 As shown, the fixing frame 100 includes multiple cell fixing units 110, and the cell 200 is installed in the cell fixing unit 110. The size of the cell fixing unit 110 is larger than the size of the cell 200. In this embodiment, the main function of the fixing frame is to provide physical support to ensure the stable installation of the cells, circuits, and other components. It not only needs to fix multiple cells but also accommodate connecting lines, control circuits, and other components to ensure the stability and safety of the battery module during operation. The size of the fixing frame is determined by the size of the product structure and the battery design capacity requirements. When there is a conflict between these two factors, it is usually necessary to optimize the size and number of cells. For example, in a limited space, it may be necessary to use cells with higher energy density or to save space by adopting different arrangement methods. In terms of material selection, the fixing frame can be an injection molded part or a metal part. Furthermore, the fixing frame provides a precise fixing position through the cell fixing units to ensure that the cell 200 is securely installed in the entire battery module. Each battery cell has its own fixing unit, which is designed to be slightly larger than the actual size of the battery cell. This ensures that the battery cell will not be difficult to place due to insufficient space during installation, and also prevents the battery cell from shifting due to improper fixing.

[0022] Furthermore, in one embodiment of this utility model, the inner four sides of the cell fixing unit 110 are provided with protrusions 1101, the protrusions 1101 abut against the cell 200, and the filler 400 covers the protrusions 1101. The height of the protrusions 1101 is less than the thickness of the fixing frame 100. In this embodiment, the protrusions 1101, as the inner four sides of the cell fixing unit 110, mainly serve to provide a precise and reliable contact surface, enabling the cell 200 to be stably positioned within the frame. The protrusions can provide a relatively precise contact point at the edge of the cell, preventing displacement or shaking of the cell within the fixing unit. This is crucial for the stability of the battery module, especially during equipment use when the battery needs to withstand vibration or other external forces; the protrusions can effectively prevent loosening between the cell and the frame. The filler 400 covers the protrusions 1101, and its main function is to provide support for the cell, increasing the overall stability of the cell fixing unit. When the filler covers the boss 1101, it increases the contact area with the cell edge, thereby enhancing the bonding strength between the cell and the fixing unit. The increased bonding area helps the cell maintain its stability during long-term use, preventing loosening due to thermal expansion or external forces. Therefore, by setting a step adapted to the cell edge at the connection between the cell fixing unit and the cell edge, a good overlap with the cell edge can be achieved, providing more bonding area for the filler.

[0023] Furthermore, in one embodiment of this utility model, the battery cell 200 is a pouch cell. The battery cell is a core component of the battery module, and this solution uses a pouch cell, which includes a positive electrode, a negative electrode, a separator, and an electrolyte. The positive and negative electrode connectors of the battery cell are connected to the input / output control circuit to achieve charging and power supply. The pouch cell is encapsulated using flexible packaging materials (such as aluminum-plastic film), resulting in a thinner profile and lighter weight compared to traditional hard-shell cells. By optimizing internal materials and process design, the pouch cell can reduce the overall thickness of the battery module without sacrificing battery capacity, thus meeting the demands of modern battery modules for lightweighting and thinning.

[0024] The thickness of a battery module has a significant impact on the size and weight of the final product. Compared to traditional hard-shell cells, pouch cells can significantly reduce the overall thickness of the module due to their thinner casing and encapsulation materials. Therefore, in applications requiring ultra-thin designs, pouch cells offer higher space utilization, helping to optimize the size of the battery module.

[0025] Furthermore, in one embodiment of this utility model, the positive and negative electrode connecting pieces of the battery cell 200 are soldered to the control circuit via the connecting wire 300. Through soldering, a robust electrical connection is achieved between the positive and negative electrode connecting pieces and the electrode points of the control circuit, ensuring efficient current transmission and reducing the risk of poor contact or loosening. Simultaneously, the control circuit and connecting wire are composed of components and circuits with short-circuit protection functions, as well as connectors. The battery cells are connected together via the control circuit to form a module with charging and power supply functions. In this embodiment, by soldering the positive and negative electrode connecting pieces of the battery cell to the control circuit, combined with connecting wires and protective components with short-circuit protection functions, the high reliability, safety, and long lifespan of the battery module are effectively guaranteed.

[0026] Furthermore, in one embodiment of this utility model, the filler 400 is formed by curing a fluid UV-curing adhesive. UV-curing adhesive hardens rapidly after being irradiated with ultraviolet light, with a curing speed much faster than traditional adhesives. This effectively shortens the production cycle and improves production efficiency. Because a fluid adhesive is used, it can more evenly fill the recessed areas between the frame and the battery cell, ensuring that there are no air bubbles, voids, or uneven adhesive layers during the connection process, thereby ensuring the stability and reliability of the battery module. After curing, the structure formed by the UV adhesive has high bonding strength, ensuring a firm bond between the battery cell, control circuit, and connecting wires and the frame, enhancing the structural strength of the entire module.

[0027] In the manufacturing process, the fixing frame is first placed in a dedicated glue-applying fixture for the battery module, and the control circuit and battery cells are then arranged inside the frame in a specific order. At this stage, the glue-applying process is crucial. Slow glue application ensures that the glue flows evenly into the gap between the frame and the battery cells, preventing overflow or uneven distribution. Precise control of the glue injection volume is necessary to ensure that the glue fills the recessed areas between the frame and the battery cells without excessive overflow. The glue application process ends when the glue reaches the connection between the frame and the battery cells and the glue height is equal to the frame height. Then, a UV light source is activated for curing. The UV light irradiates the glue surface, rapidly solidifying it into a solid and forming a strong connection. Afterward, the battery module is flipped over, and the same glue-applying and curing steps are repeated to ensure the other side of the battery cells receives the same treatment. After UV curing, the connection between the battery cells and the frame is very strong, increasing the overall structural strength of the module. This reinforcement allows the module to withstand more external pressure and impact during long-term use, preventing battery failure due to physical damage. Because the filler adhesive precisely fills the gaps between the frame and the battery cells, the cured surface exhibits almost no thickness variation, resulting in a smooth surface. This not only improves the appearance but also reduces the concentration of mechanical stress caused by unevenness during module use, extending the module's lifespan. By employing a UV-curable adhesive for filling, the battery module in this embodiment is thinner than traditional battery modules. This thin design makes the battery module more compact in size and weight, suitable for applications with strict space and weight requirements, such as portable electronic devices and power tools. Traditional battery modules may exhibit some space waste during connection, but with adhesive filling and curing, the overall module design is more compact, optimizing space utilization. This is particularly important in applications requiring a large number of battery modules, such as electric vehicles or large-scale energy storage systems, where saving space and increasing strength are crucial. By using a filler formed from a fluid UV-curable adhesive, the battery module in this embodiment improves structural strength while optimizing its shape design.

[0028] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0029] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, the inventive aspect lies in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the invention.

[0030] Furthermore, those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0031] It should be noted that the above embodiments are illustrative of the present invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. An ultra-thin battery module, characterized in that, The device includes a fixed frame (100), a control circuit, multiple battery cells (200), connecting wires (300), and multiple fillers (400). The multiple battery cells (200) are installed in the fixed frame (100), and the multiple fillers (400) fill the gaps between the multiple battery cells (200) and the fixed frame (100). The multiple battery cells (200) are electrically connected to the control circuit through the connecting wires (300). The thickness of the fixed frame (100) is the same as the thickness of the battery cells (200).

2. The ultra-thin battery module as described in claim 1, characterized in that, The fixed frame (100) includes a plurality of battery cell fixing units (110), in which the battery cell (200) is installed, and the size of the battery cell fixing unit (110) is larger than the size of the battery cell (200).

3. The ultra-thin battery module as described in claim 2, characterized in that, The inner four sides of the battery cell fixing unit (110) are provided with a boss (1101), the boss (1101) abuts against the battery cell (200), and the filler (400) covers the boss (1101).

4. The ultra-thin battery module as described in claim 3, characterized in that, The height of the boss (1101) is less than the thickness of the fixed frame (100).

5. The ultra-thin battery module as described in claim 1, characterized in that, The battery cell (200) is a pouch cell.

6. The ultra-thin battery module as described in claim 1, characterized in that, The positive and negative electrode connecting pieces of the battery cell (200) are soldered to the control circuit via the connecting wire (300).

7. The ultra-thin battery module as described in claim 1, characterized in that, The filler (400) is formed by curing a fluid UV-curable adhesive.

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