Compact lithium battery

Abstract

The utility model discloses a compact lithium battery, it includes: casing, electric core, circuit protection board, charge management board and metal band, the electric core is provided with the accommodation groove, circuit protection board is installed with electronic element, and the electronic element is located in the accommodation groove, and metal band sets up in the casing, and the circuit protection board passes through metal band electricity connection with charge management board, place circuit protection board in the accommodation groove of electric core end portion, ingeniously utilize electric core end portion space, avoid the traditional layout in electric element to the occupation of electric core main body space. Meanwhile, charge management board and circuit protection board pass through metal band electricity connection, and this design discards the complex wiring, not only saves the space, still improved the reliability of electric connection.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to a compact lithium battery. Background Technology

[0002] In traditional compact lithium-ion batteries, the available space within the cell is often squeezed by the placement of electrical components such as circuit protection boards and charging management boards, limiting the increase in cell capacity. The less compact layout of these components occupies internal space, making it difficult to improve the overall energy density of the battery. Furthermore, the electrical connections between the cell and these components often require complex wiring or connection structures, which not only occupy additional space but may also affect battery performance. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a compact lithium battery that maintains a compact and stable structure while increasing the space available for the battery cell.

[0004] A compact lithium battery according to a first aspect of the present invention includes: a housing, a battery cell, a circuit protection board, a charging management board, and a metal strip; the battery cell is installed inside the housing and has a receiving slot; the circuit protection board is disposed inside the housing and located at the end of the battery cell, and electronic components are mounted on the circuit protection board and located in the receiving slot; the charging management board is disposed inside the housing, one of the circuit protection board and the charging management board has a positive contact, and the other of the circuit protection board and the charging management board has a negative contact; the metal strip is disposed inside the housing, and the circuit protection board and the charging management board are electrically connected through the metal strip.

[0005] The compact lithium battery according to embodiments of this utility model has at least the following beneficial effects: placing the circuit protection board within the receiving slot at the end of the cell cleverly utilizes the space at the end of the cell, avoiding the encroachment of electrical components on the main body space of the cell in traditional layouts. Simultaneously, the charging management board and the circuit protection board are electrically connected via a metal strip. This design eliminates complex wiring, saving space and improving the reliability of the electrical connection. The close-fitting design of the metal strip also helps reduce unnecessary gaps inside the battery, further optimizing space utilization. This layout, by optimizing the internal space arrangement, achieves the dual advantages of compact structure and increased cell capacity, allowing the cell to occupy more space within a limited battery casing, thereby significantly increasing cell capacity, enhancing battery energy density, extending battery life, and meeting market demand for high-performance batteries.

[0006] According to some embodiments of the present invention, the charging management board and the circuit protection board are respectively located at both ends of the battery cell, and the metal strip extends from one end of the battery cell to the other end of the battery cell and is in close contact with the surface of the battery cell.

[0007] According to some embodiments of the present invention, the end of the metal strip is provided with a turning section, and at least one of the charging management board and the circuit protection board is provided with a first conductive sheet, and the turning section is welded to the first conductive sheet.

[0008] According to some embodiments of this utility model, the metal strip is provided in two parts, and the charging management board and the circuit protection board are each provided with two first conductive sheets and connected to the metal strips accordingly.

[0009] According to some embodiments of the present invention, the housing includes an upper cover and a lower cover, the upper cover and the lower cover are connected to each other and cooperate to cover the battery cell, the charging management board and the circuit protection board; the upper cover is pressed tightly against the upper part of the battery cell and can cooperate with the battery cell to press and fix the metal strip.

[0010] According to some embodiments of the present invention, the charging management board is provided with a USB interface, which passes through the top cover and is exposed relative to the housing.

[0011] According to some embodiments of the present invention, the receiving groove is disposed at the end of the battery cell, and a step for supporting the electronic component is formed between the edge of the receiving groove and the battery cell body.

[0012] According to some embodiments of the present invention, the battery cell is provided with tabs, the circuit protection board is provided with a second conductive sheet, and the tabs are welded to the second conductive sheet and electrically connected thereto.

[0013] According to some embodiments of the present invention, the receiving groove is located at the upper end of the battery cell, the electrode is located at the lower end of the battery cell, and the receiving groove and the electrode are located at the same end of the battery cell; the middle part of this end of the battery cell extends outward and separates the receiving groove and the electrode.

[0014] According to some embodiments of the present invention, the charging management board is provided with a charging indicator light, which is exposed relative to the housing and can indicate the charging status by emitting light.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of a compact lithium battery according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram showing the rear of a compact lithium battery;

[0019] Figure 3 for Figure 1 A schematic diagram showing the disassembly state of a compact lithium battery;

[0020] Figure 4 for Figure 1 A schematic diagram showing the rear view of a compact lithium battery in its disassembled state;

[0021] Reference numerals: Housing 100; Top cover 110; Bottom cover 120; Negative contact 210; Positive contact 220; USB interface 300; Battery cell 400; Tab 430; Receiving slot 450; Circuit protection board 500; Second conductive sheet 530; Electronic component 540; Charging management board 600; First conductive sheet 640; Metal strip 700; Turning section 750; Charging indicator light 800; Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0026] Reference Figure 1 A compact lithium battery includes: a housing 100, a battery cell 400, a circuit protection board 500, a charging management board 600, and a metal strip 700; the battery cell 400 is installed inside the housing 100 and has a receiving groove 450; the circuit protection board 500 is disposed inside the housing 100 and located at the end of the battery cell 400, and the circuit protection board 500 is equipped with an electronic component 540, which is located inside the receiving groove 450; the charging management board 600 is disposed inside the housing 100, one of the circuit protection board 500 and the charging management board 600 is provided with a positive contact 220, and the other of the circuit protection board 500 and the charging management board 600 is provided with a negative contact 210; the metal strip 700 is disposed inside the housing 100, and the circuit protection board 500 and the charging management board 600 are electrically connected through the metal strip 700. By placing the circuit protection board 500 within the receiving slot 450 at the end of the battery cell 400, the space at the end of the battery cell 400 is cleverly utilized, avoiding the encroachment of electrical components on the main body space of the battery cell 400 in traditional layouts. Simultaneously, the charging management board 600 and the circuit protection board 500 are electrically connected via a metal strip 700. This design eliminates complex wiring, saving space and improving the reliability of the electrical connection. The close-fitting design of the metal strip 700 also helps reduce unnecessary gaps inside the battery, further optimizing space utilization. This layout, by optimizing the internal space arrangement, achieves the dual advantages of compact structure and increased battery cell 400 capacity. It also allows the battery cell 400 to occupy more space within the limited battery casing 100, thereby significantly increasing the battery cell 400 capacity, enhancing battery energy density, extending battery life, and meeting the market demand for high-performance batteries.

[0027] Specifically, the metal strip 700 can be made of nickel strip or other thin metal material. The specific implementation is not unique, but can be adjusted according to the actual situation, and no restrictions are imposed here.

[0028] It is foreseeable that an insulating protective layer can be added to the surface of the metal strip 700. This insulating protective layer would use a high-temperature resistant and corrosion-resistant insulating material, such as polyimide film, to prevent accidental short circuits between the metal strip 700 and the cell 400 or other components, and to protect the metal strip 700 from corrosive substances such as electrolytes. Simultaneously, an elastic buffer pad can be placed in the area where the metal strip 700 contacts the cell 400. This elastic buffer pad can cushion the metal strip 700 and the cell 400 when the battery is subjected to external impacts or vibrations, reducing the compressive stress of the metal strip 700 on the surface of the cell 400, preventing damage to the cell 400's electrodes, and improving the battery's impact resistance and mechanical reliability.

[0029] In some embodiments, reference is made to Figure 3 The charging management board 600 and circuit protection board 500 are located at both ends of the battery cell 400, respectively. A metal strip 700 extends from one end of the battery cell 400 to the other end and is tightly attached to the surface of the battery cell 400. This arrangement maximizes the use of space along the length of the battery cell 400, with electrical components arranged at both ends and the middle area entirely dedicated to the battery cell 400, providing ample expansion space. The metal strip 700, tightly attached to the surface of the battery cell 400, serves both as a conductor for electrical connections and as a structural reinforcement, preventing displacement or deformation of the battery cell 400 within the battery casing 100 and improving the battery's mechanical stability. This design fully utilizes the axial space of the battery, maximizing both the length and capacity of the battery cell 400, while ensuring a rational layout of electrical components and the overall compactness of the battery structure.

[0030] In some embodiments, reference is made to Figure 4 The metal strip 700 has a bend 750 at its end, and at least one of the charging management board 600 and the circuit protection board 500 has a first conductive sheet 640. The bend 750 is welded to the first conductive sheet 640. The bend 750 at the end of the metal strip 700 is welded to the first conductive sheet 640, forming a stable and efficient electrical connection. Compared to other connection methods, such as bolted connections or plug-in connections, welding provides lower contact resistance, reduces energy loss during transmission, and improves the battery's charging and discharging efficiency. The design of the bend 750 allows the metal strip 700 to adapt to the layout of the charging management board 600 and the circuit protection board 500, achieving a reliable connection even in space-constrained conditions. The use of the first conductive sheet 640 enhances the conductivity and corrosion resistance of the weld point, ensuring long-term stable electrical connection performance, extending battery life, and playing a significant role in improving the overall performance of the battery.

[0031] Specifically, the first conductive sheet 640 can be made of nickel sheet or other thin conductive materials. The specific implementation is not unique, but can be adjusted according to the actual situation, and no restrictions are imposed here.

[0032] In some embodiments, reference is made to Figure 3 Two metal strips 700 are configured, and the charging management board 600 and circuit protection board 500 each have two first conductive plates 640 connected to the corresponding metal strips 700. The two metal strips 700 connected to their corresponding first conductive plates 640 form a dual electrical connection path. This redundant design significantly improves the reliability and stability of the electrical connection, reducing the risk of connection interruption due to single-point failure. Even when the battery is operating under high load or a connection point experiences partial damage, the other connection path can still maintain the battery's basic functions, enhancing the battery's fault tolerance. Simultaneously, multiple metal strips 700 can disperse the current, reducing the current density at each connection point, minimizing heat generation and connection point losses caused by overcurrent, further improving battery safety and lifespan, and providing a more robust guarantee for high-performance battery applications.

[0033] In some embodiments, reference is made to Figure 3 The housing 100 includes an upper cover 110 and a lower cover 120, which are interconnected and cooperate to cover the battery cell 400, the charging management board 600, and the circuit protection board 500. The upper cover 110 presses tightly against the upper part of the battery cell 400 and cooperates with the battery cell 400 to firmly press and fix the metal strip 700. The upper cover 110 and the lower cover 120 of the housing 100 are interconnected to form a complete covering structure, safely encapsulating the battery cell 400, the charging management board 600, and the circuit protection board 500 inside. The upper cover 110 presses tightly against the upper part of the battery cell 400 and cooperates with the battery cell 400 to firmly press and fix the metal strip 700. The upper cover 110 not only plays a protective role, preventing foreign objects from entering and the battery cell 400 from being damaged, but also serves as an auxiliary fixing structure for the metal strip 700, enhancing the bonding stability between the metal strip 700 and the battery cell 400. The metal strip 700 is tightly attached to the surface of the cell 400 by the clamping force of the top cover 110, which prevents the metal strip 700 from loosening or shifting under battery vibration or impact conditions, ensuring the reliability of electrical connection. At the same time, it optimizes the internal space layout of the battery, makes the components tightly connected, and improves the overall structural compactness and mechanical strength of the battery.

[0034] In some embodiments, reference is made to Figure 2The charging management board 600 is equipped with a USB interface 300, which passes through the top cover 110 and is exposed relative to the housing 100. The inclusion of the USB interface 300 on the charging management board 600 and its exposure within the housing 100 significantly enhances the battery assembly's versatility and user-friendliness. As a widely used standard interface, the USB interface 300 allows for easy connection to various devices without the need for additional adapters, simplifying the user experience. Users can directly charge the battery using common USB cables or use the battery as a power bank to power other devices, expanding the battery's application scenarios. The exposed USB interface 300, with its waterproof and dustproof design, ensures reliability in complex environments, making the battery assembly suitable not only for portable electronic devices but also for outdoor and industrial applications, meeting the demands for battery versatility and ease of use and enhancing the product's market competitiveness.

[0035] Specifically, the USB interface 300 is a TYPE-C interface.

[0036] In some embodiments, reference is made to Figure 3 A receiving groove 450 is disposed at the end of the battery cell 400, and a step is formed between the edge of the receiving groove 450 and the body of the battery cell 400 to support the electronic component 540. The receiving groove 450, located at the end of the battery cell 400, and the step formed between its edge and the body of the battery cell 400, provides a stable support platform for the electronic component 540, thereby preventing the electronic component 540 from shaking or shifting inside the battery, and improving the installation accuracy and reliability of the electronic component 540. The presence of the step clearly defines the installation position of the electronic component 540, simplifies the alignment and fixing process of the circuit protection board 500, and reduces assembly errors during production. In this way, the internal space of the battery is utilized more efficiently, creating more space for increasing the capacity of the battery cell 400 without increasing the overall volume, while ensuring the stable operation of the electrical components. This is one of the key structural optimizations for achieving high battery performance and high reliability.

[0037] Furthermore, an antistatic coating or antistatic textured structure can be applied to the step surface. The antistatic coating, made of conductive polymer materials or metal oxide coatings, effectively reduces the accumulation of static electricity generated during the installation and use of electronic component 540, preventing damage to the electronic component 540 caused by electrostatic discharge. The antistatic textured structure increases surface roughness by designing tiny protrusions or grooves on the step surface, reducing the efficiency of static charge accumulation, while providing better adhesion for electronic component 540, preventing displacement or loosening under battery vibration or impact conditions. These measures help improve the installation stability and reliability of electronic component 540, ensure the normal operation of the battery protection circuit, and are of great significance for improving the overall performance and safety of the battery.

[0038] In some embodiments, reference is made to Figure 4 The battery cell 400 is provided with tabs 430, and the circuit protection board 500 is provided with a second conductive sheet 530. The tabs 430 are welded to the second conductive sheet 530 and electrically connected to it. The tabs 430 of the battery cell 400 and the second conductive sheet 530 of the circuit protection board 500 are welded to form an efficient and stable electrical connection. Compared with other connection methods, the welding process can provide lower contact resistance and higher current carrying capacity, ensuring good conductivity between the battery cell 400 and the circuit protection board 500. As the current collecting electrode of the battery cell 400, the solid welding of the tabs 430 to the second conductive sheet 530 can reduce the internal contact resistance of the battery, reduce the energy loss of the battery during charging and discharging, and improve the charging and discharging efficiency and overall performance of the battery. This direct welding connection also enhances the compactness of the battery structure, reduces the space occupied by the connecting components, and makes it possible to further increase the capacity of the battery cell 400. At the same time, it also improves the automation welding efficiency and quality control level in the battery production process.

[0039] Specifically, the second conductive sheet 530 can be made of nickel sheet or other thin conductive materials. The specific implementation is not unique, but can be adjusted according to the actual situation, and no restrictions are imposed here.

[0040] In some embodiments, reference is made to Figure 4 The receiving slot 450 is located at the upper end of the battery cell 400, and the tab 430 is located at the lower end of the battery cell 400. The receiving slot 450 and the tab 430 are located at the same end of the battery cell 400. A middle section of this end of the battery cell 400 extends outward and separates the receiving slot 450 and the tab 430. The receiving slot 450 provides space for the electronic component 540, while the tab 430 is responsible for the electrical connection function of the battery cell 400. This arrangement at the same end reduces functional redundancy at different ends of the battery cell 400 and optimizes the overall design of the battery cell 400. The middle outward extension not only separates the receiving slot 450 and the tab 430 but also provides a more reasonable spatial distribution for the electrochemical reaction inside the battery cell 400, avoiding mutual interference between the internal structures of the battery cell 400. This design makes the space utilization at the end of the battery cell 400 more efficient, achieving a perfect combination of high capacity and circuit function within a limited space, improving the battery's space utilization and energy density.

[0041] In some embodiments, reference is made to Figure 1The charging management board 600 is equipped with a charging indicator light 800, which is exposed relative to the housing 100 and illuminates to indicate the charging status. The exposed charging indicator light 800 on the charging management board 600 provides users with intuitive and convenient feedback on the charging status. Users do not need other devices or complex operations; they can simply observe the color or flashing pattern of the indicator light to understand the battery's charging progress and completion status in real time. This intuitive feedback helps users to rationally plan charging time, avoid overcharging or undercharging, and extend battery life. Furthermore, the exposed charging indicator light 800 is designed with waterproof and dustproof features to maintain stable operation in various usage scenarios, improving the user experience and the practicality of the battery components, making it more in line with modern consumers' expectations for the convenience and intelligence of electronic products.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A compact lithium battery, characterized by, include: Casing (100); A battery cell (400) is installed inside the housing (100), and the battery cell (400) is provided with a receiving groove (450); A circuit protection board (500) is disposed inside the housing (100) and located at the end of the battery cell (400). The circuit protection board (500) is equipped with electronic components (540), which are located in the receiving groove (450). A charging management board (600) is disposed inside the housing (100). One of the circuit protection board (500) and the charging management board (600) is provided with a positive contact (220), and the other of the circuit protection board (500) and the charging management board (600) is provided with a negative contact (210). A metal strip (700) is disposed inside the housing (100), and the circuit protection board (500) and the charging management board (600) are electrically connected through the metal strip (700).

2. The compact lithium battery as described in claim 1, characterized in that: The charging management board (600) and the circuit protection board (500) are located at both ends of the battery cell (400), and the metal strip (700) extends from one end of the battery cell (400) to the other end of the battery cell (400) and is in close contact with the surface of the battery cell (400).

3. The compact lithium battery as described in claim 2, characterized in that: The metal strip (700) has a bend section (750) at its end, and at least one of the charging management board (600) and the circuit protection board (500) has a first conductive sheet (640), and the bend section (750) is welded to the first conductive sheet (640).

4. The compact lithium battery as described in claim 3, characterized in that: The metal strip (700) is provided in two parts, and the charging management board (600) and the circuit protection board (500) are each provided with two first conductive sheets (640) and connected to the metal strip (700).

5. The compact lithium battery as described in claim 2, characterized in that: The housing (100) includes an upper cover (110) and a lower cover (120). The upper cover (110) and the lower cover (120) are connected to each other and cooperate to cover the battery cell (400), the charging management board (600) and the circuit protection board (500). The upper cover (110) is pressed tightly against the upper part of the battery cell (400) and can cooperate with the battery cell (400) to press and fix the metal strip (700).

6. The compact lithium battery as described in claim 5, characterized in that: The charging management board (600) is provided with a USB interface (300), which passes through the top cover (110) and is exposed relative to the housing (100).

7. The compact lithium battery as described in claim 1, characterized in that: The receiving groove (450) is disposed at the end of the battery cell (400), and a step for supporting the electronic component (540) is formed between the edge of the receiving groove (450) and the body of the battery cell (400).

8. The compact lithium battery as described in claim 7, characterized in that: The battery cell (400) is provided with a tab (430), and the circuit protection board (500) is provided with a second conductive sheet (530). The tab (430) is soldered to the second conductive sheet (530) and electrically connected to it.

9. The compact lithium battery as described in claim 8, characterized in that: The receiving groove (450) is located at the upper end of the battery cell (400), and the electrode (430) is located at the lower end of the battery cell (400). The receiving groove (450) and the electrode (430) are located at the same end of the battery cell (400). The middle part of this end of the battery cell (400) extends outward and separates the receiving groove (450) and the electrode (430).

10. The compact lithium battery as described in claim 1, characterized in that: The charging management board (600) is provided with a charging indicator light (800), which is exposed relative to the housing (100) and can indicate the charging status by emitting light.

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