Battery protection board and fast charging battery

Abstract

The utility model belongs to the technical field of batteries, and mainly relates to a battery protection board and a fast charging battery, the battery protection board comprises a body part, the body part comprises a first surface and a second surface which are deviated from each other, an electric conductor is welded on the first surface, a first cavity is arranged between the electric conductor and the first surface, and a first heat conduction layer is arranged in the first cavity; the first cavity is arranged between the first surface of the battery protection plate and the electric conductor and is filled with the first heat conduction layer for efficient heat dissipation, so that the problem of high heat accumulation generated by the battery in the fast charging process is effectively solved; meanwhile, the utility model further designs a fast charging battery which comprises the battery protection plate, and the safety performance of the battery is improved under the condition that the size of the battery is not changed.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to a battery protection board and a fast - charging battery. Background Art

[0002] With the increasing demand for battery performance, fast - charging technology has developed unprecedentedly, and fast - charging batteries have emerged as the times require. The charging power of fast - charging batteries can reach 60W - 300W. Fast - charging batteries can be roughly or completely charged in a short time. However, with the increase in charging power, the corresponding current is getting larger and the heat is getting higher.

[0003] Currently, the problem of temperature rise that comes with it is a difficult problem that needs to be solved urgently. The existing technology solves the above - mentioned technical problems by directly attaching new heat - dissipating materials to the protection board splice plate. However, with the increase of new materials, the number of layers of the protection board also increases, and the heat - dissipation performance is greatly reduced.

[0004] Based on this, it is urgent to improve the existing battery protection board and fast - charging battery to solve the defects existing in the foregoing technology. Summary of the Utility Model

[0005] One of the purposes of the present utility model is: in view of the limitations of the current technology, the present application innovatively designs a battery protection board, aiming to construct a specific cavity for accommodating heat - dissipating materials on the surface of the battery protection board, so as to improve the working performance of the protection board under the same battery size.

[0006] The technical means to achieve the above - mentioned technical purpose are as follows;

[0007] A battery protection board includes a body part. Among them, the body part includes a first surface and a second surface that face away from each other. The first surface is provided with a conductor and a heat - conducting layer. There is a first cavity between the conductor and the first surface, and the heat - conducting layer is located in the first cavity.

[0008] The above - mentioned technical solution has the following technical effects:

[0009] The present application effectively solves the problem of high - heat accumulation generated by the battery during fast - charging and prolongs the service life of the battery by setting a first cavity between the first surface of the battery protection board and the conductor and filling it with a first heat - conducting layer with high heat - dissipation efficiency.

[0010] As a further improvement to the battery protection board of the present utility model, the heat - conducting layer is in contact with the conductor.

[0011] As a further improvement to the battery protection board of the present utility model, the conductor is welded to the first surface;

[0012] The conductor is welded to the first surface by soldering.

[0013] As a further improvement to the battery protection board of the present utility model, the conductor includes a main body and a welding part. A groove is formed on the surface of the main body close to the first surface, and the groove and the first surface together form a first cavity. The welding part is arranged at one end of the main body close to the first surface.

[0014] As a further improvement to the battery protection board of the present utility model, there are two welding parts, which are respectively located at opposite ends of the main body; and / or,

[0015] The welding part is arranged on the surface of the main body facing away from the groove.

[0016] As a further improvement to the battery protection board of the present utility model, the heat-conducting layer is solidified and formed in the first cavity.

[0017] As a further improvement to the battery protection board of the present utility model, the main body part is a PCB board. The main body part includes a charge and discharge circuit. One end of the conductor is electrically connected to the input end of the charge and discharge circuit, and the other end of the conductor is electrically connected to the output end of the charge and discharge circuit;

[0018] The material of the heat-conducting layer is an insulating material.

[0019] As a further improvement to the battery protection board of the present utility model, an input terminal and an output terminal, both of which are located outside the first cavity, are welded to the main body part. The input terminal is electrically connected to the input end of the charge and discharge circuit, and the output terminal is electrically connected to the output end of the charge and discharge circuit.

[0020] As a further improvement to the battery protection board of the present utility model, the material of the heat-conducting layer is polyurethane material.

[0021] The second object of the present utility model is: In view of the deficiencies in the design of the protection board in current fast-charging batteries, the present application also proposes a fast-charging battery incorporating the above-mentioned battery protection board, aiming to further improve the overall performance and safety of the fast-charging battery through an optimized protection board structure.

[0022] The technical means to achieve the above technical object are as follows:

[0023] A fast-charging battery includes the battery protection board as described in any one of the above.

[0024] The above technical solution has the following technical effects:

[0025] By incorporating the above battery protection board into the fast-charging battery, the protection performance during the charging and discharging process is improved without changing the battery size. Description of the Drawings

[0026] The accompanying drawings described herein are used to provide a further understanding of the present utility model, and constitute a part of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model, and do not constitute an improper limitation of the present utility model. In the drawings:

[0027] Figure 1 It is one of the schematic structural diagrams of Embodiment 1 in the present utility model;

[0028] Figure 2 It is the second of the schematic structural diagrams of Embodiment 1 in the present utility model;

[0029] Figure 3 It is the third of the schematic structural diagrams of Embodiment 1 in the present utility model;

[0030] Figure 4 It is the schematic structural diagram of Embodiment 2 in the present utility model.

[0031] Wherein:

[0032] 1 - Body part;

[0033] 11 - First surface;

[0034] 12 - Second surface;

[0035] 2 - Conductor;

[0036] 21 - Main body;

[0037] 22 - Welding part;

[0038] 23 - Groove;

[0039] 3 - First cavity;

[0040] 31 - Second cavity;

[0041] 4 - Heat conduction layer. Specific embodiments

[0042] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present application. The terms used in the specification of the present application herein are only for the purpose of describing specific embodiments, and are not intended to limit the present application.

[0043] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", and "fixation" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] Although this application is disclosed above in a preferred embodiment, it is not used to limit the claims. Any person skilled in the art can make several possible changes and modifications without departing from the concept of this application. Therefore, the protection scope of this application should be subject to the scope defined by the claims of this application.

[0045] The following will further describe the present utility model in detail in combination with specific embodiments, but the embodiments of the present utility model are not limited thereto.

[0046] Embodiment 1

[0047] As Figure 1-2 shown, in order to solve the problem of high heat accumulation in the fast charging protection board, this embodiment discloses a battery protection board, including a body part 1. The body part 1 includes a first surface 11 and a second surface 12 that face away from each other. The first surface 11 is provided with a conductor 2 and a heat conduction layer 4. There is a first cavity 3 between the conductor 2 and the first surface 11, and the heat conduction layer 4 is located in the first cavity 3. The body part 1 is the most basic structure of the battery protection board. The functions of the body part 1 include but are not limited to welding electronic components, connecting the heat conduction layer 4, and the functions of the body part 1 also include connecting other components that play a role in fast charging the battery.

[0048] Specifically, the first surface 11 reserves many welding positions for welding electronic components, and these welding positions are mostly used for welding electronic components. And due to the increasing complexity of the existing protection boards used in battery fast charging, the temperature of the protection board gradually increases during actual application. In the prior art, some heat-dissipating materials are often applied to the electronic components of the protection board during the encapsulation process of the fast charging protection board. Although this method alleviates the temperature rise of the protection board during operation to a certain extent, the thickness of the protection board and the complexity of the encapsulation process have also been significantly improved. For this reason, this embodiment proposes to provide a conductor 2 that acts as a printed circuit in the charging protection board in the body part 1 of the fast charging protection board, and externally connect the conductor 2 to the protection board.

[0049] Specifically, since the conductor 2 replaces the circuit printed on the protection board, the printing cost of the protection board is saved and the printing requirements can be reduced at the design stage of the protection board, thereby reducing the thickness of the battery protection board. In a specific embodiment, taking a 120W fast charging protection board as an example, through the above design of this embodiment, the number of layers of the protection board HD I can be changed from 10 layers of HD I to 8 layers of HD I, reducing the thickness of the protection board by two layers. (HD I is the English abbreviation of High Density Interconnector, a high-density interconnect (HDI) manufactured printed circuit board. A printed circuit board is a structural component formed by insulating materials supplemented with conductor wiring. When the printed circuit board is made into a final product, integrated circuits, transistors (triodes, diodes), passive components (such as resistors, capacitors, connectors, etc.) and various other electronic components will be installed on it.)

[0050] Furthermore, the first surface 11 is used to carry the electronic components and the above-mentioned conductor 2. At the same time, there is a first cavity 3 between the conductor 2 and the first surface 11, and the heat conduction layer 4 is located in the first cavity 3. From this, it can be known that the working principle of the battery protection board in this embodiment is:

[0051] During the charging process, when current passes through the externally connected conductor 2, its efficient and stable conductivity ensures the rapid transmission of current, reducing the resistance loss and heat accumulation that may be brought about by the traditional printed circuit. This design not only improves the fast charging efficiency but also significantly improves the overall thermal management ability of the battery protection board.

[0052] In addition, the heat conduction layer 4 provided in the first cavity 3 serves as a bridge for heat transfer, and can quickly conduct the heat generated by the conductor 2 when transmitting current, as well as the heat generated in the main body part 1, and dissipate it to the external environment through other parts of the protection board or the heat dissipation structure. This active heat dissipation mechanism effectively reduces the working temperature of the protection board and its surrounding electronic components, extends the service life, and improves the safety and stability of the entire battery system.

[0053] It should be noted that the conductor 2 in this embodiment not only optimizes the circuit layout but also enhances the maintainability of the battery protection board. Since the conductor 2 is externally connected, when the function of the protection board needs to be replaced, there is no need to disassemble the entire protection board, and only the conductor 2 part needs to be operated, which greatly saves the maintenance time and cost.

[0054] Further, in the specific implementation process, it may be considered that the above-mentioned conductor 2 generally uses a material with better electrical conductivity, and this material is generally a metal, specifically any one of copper, nickel, copper-plated nickel, and nickel-plated copper. Since metals generally have heat dissipation properties, in actual production, on the premise of fully covering the electronic components inside the first cavity 3, the thickness of a certain heat conduction layer 4 can be reduced, so that a second cavity 31 is formed between the heat conduction layer 4 and the conductor 2. The second cavity 31 can give full play to the heat conduction performance of the conductor 2, and at the same time, it is separated from each electronic component through the heat conduction layer 4. Under the insulation of the heat conduction layer 4, the situation of short circuit between the protection board electronic components is avoided. At the same time, considering that the performance of the material of the heat conduction layer 4 in the prior art is constantly improving, the contact between the heat conduction layer 4 and the conductor 2 can give full play to the role of the heat conduction layer 4, thereby further improving the performance of the protection board in this embodiment.

[0055] Further, the conductor 2 is welded to the first surface 11; wherein, the first surface 11 is the surface of the electronic components that realize the function of the battery protection board. In this embodiment, welding the conductor 2 to the first surface 11 can give full play to the roles of the conductor 2 and the heat conduction layer 4. However, this embodiment does not mean that there is only one conductor 2 and one heat dissipation layer in this application. Since some electronic components are also welded to the second surface 12 of the battery protection board, and most of the second surfaces 12 of the battery protection board need to be welded to the two working ports of the flexible board, welding the same-structured and same-sized or same-structured and different-sized conductor 2 and heat conduction layer 4 to the second surface 12 can further improve the performance of the battery protection board.

[0056] Preferably, the conductor 2 is welded to the first surface 11 by soldering. In the specific implementation, the conductor 2 can be welded to the battery protection board by laser welding or other metal welding methods. However, since soldering has good electrical conductivity, easy operability, and low cost, it is selected as the preferred welding method in this embodiment. Soldering not only ensures a firm connection between the conductor 2 and the first surface 11, but also provides a stable current transmission path, further improving the overall performance of the battery protection board.

[0057] Further, the heat conduction layer 4 is solidified and formed inside the first cavity 3. In the specific implementation, in order to improve the encapsulation effect and heat dissipation performance, the material selected for the heat conduction layer 4 in this embodiment has a certain fluidity at 200°C and can be solidified and formed under certain conditions. The heat conduction layer 4 prepared by this material can closely adhere to the inner wall of the first cavity 3 and the surface of the conductor 2, ensuring the high efficiency of heat transfer. In addition, this solidified and formed heat conduction layer 4 also has excellent wear resistance and corrosion resistance, and can maintain stable heat dissipation performance in a harsh working environment, providing lasting protection for the battery protection board.

[0058] Furthermore, in order to balance the insulation performance of the heat-conducting layer 4, the material of the heat-conducting layer 4 is polyurethane material. In a specific implementation, the material of the heat-conducting layer 4 is further limited to a two-component polyurethane material. Since the two-component polyurethane material can form a tight cross-linked structure during the curing process, this structure not only endows the heat-conducting layer 4 with excellent mechanical strength but also significantly improves its insulation performance. In the application of the battery protection board, this insulation performance is crucial, effectively preventing the short-circuit risk between the conductor 2 and the surrounding electronic components and ensuring the safe and stable operation of the battery system.

[0059] In addition, the two-component polyurethane material also has good thermal conductivity, which can efficiently transfer the heat generated by the conductor 2 while maintaining insulation. When current passes through the conductor 2, the generated heat can be quickly absorbed by the heat-conducting layer 4 and directed to other parts of the protection board or the heat dissipation structure, thus avoiding the performance degradation or even damage caused by local overheating.

[0060] In summary, in this embodiment, by providing the conductor 2 with an externally connected printed circuit for charging protection on the main body part 1 of the battery protection board, not only the manufacturing cost and thickness are reduced, but also the charging efficiency, thermal management ability, and maintainability are improved.

[0061] Embodiment 2

[0062] As Figure 1-4 shown, different from Embodiment 1: In order to further reveal the connection structure between the conductor 2 and the main body part 1, in this embodiment, the conductor 2 includes a main body 21 and a welding part 22. A groove 23 is formed on the surface of the main body 21 close to the first surface 11, and the groove 23 and the first surface 11 together form a first cavity 3. The welding part 22 is arranged at one end of the main body 21 close to the first surface 11.

[0063] Specifically, the groove 23 is used to support the separation of the main body of the conductor 2 from the main body part 1. Its function is to enable the conductor 2 to be firmly embedded in the first surface 11 of the battery protection board, forming a tight and stable connection structure. Such a design not only enhances the mechanical strength between the conductor 2 and the protection board but also optimizes the heat transfer path. At the same time, the presence of the groove 23 enables the heat-conducting layer 4 to fit more closely between the surface of the conductor 2 and the inner wall of the first cavity 3, reducing the thermal resistance and improving the heat conduction efficiency.

[0064] Specifically, the design of the groove 23 also facilitates the filling of the heat-conducting layer 4 material. In a specific implementation, if the first cavity 3 is hollow in the direction perpendicular to the welding part 22, the heat-conducting layer 4 material can be directly filled from both sides of the hollow part; when one side of the first cavity 3 is sealed and the other side is hollow in the direction perpendicular to the welding part 22, the heat-conducting layer 4 material is filled through the hollow side. Specifically, the sealed side can ensure that the heat-conducting layer 4 material does not leak out. However, it should be noted that the sealed side does not come into contact with any circuit loops and electronic components on the main body part 1.

[0065] Furthermore, the welding part 22, as the connection bridge between the conductor 2 and the first surface 11, is made of the same material as the main body 21 of the conductor 2 in this embodiment to ensure good electrical conductivity and heat conductivity. It should be noted that although only the connection structure between one conductor 2 and one first surface 11 is shown in this embodiment, in actual applications, conductors 2 with the same structure can be provided on the second surface 12 of the battery protection board, and the connection and fixation between this conductor 2 and the second surface 12 can be achieved through a similar structure. At the same time, to meet different usage requirements, the shape, size, and quantity of the conductor 2 can also be adjusted and optimized according to the actual situation.

[0066] In summary, the design of the conductor 2 in this embodiment, by introducing innovative elements such as the groove 23 and the welding part 22, not only enhances the connection strength and stability between the conductor 2 and the battery protection board, but also optimizes the heat transfer path. These improvement measures contribute to further improving the overall performance and reliability of the battery protection board.

[0067] Furthermore, there are two welding parts 22, which are respectively located at opposite ends of the main body 21 or the welding part 22 is arranged on the surface of the main body 21 facing away from the groove 23. When there are two welding parts 22 and they are respectively located at opposite ends of the main body 21, the main function of this design is that the two welding parts 22 located at both ends of the main body 21 form a "double insurance" connection method. Even if one of the welding points is affected by external force impact or aging, the other welding point can still maintain the connection stability, greatly reducing the risk of connection failure between the conductor 2 and the first surface 11. At the same time, when current passes through the conductor 2, the generated heat will be more evenly distributed around the two welding points, avoiding the situation of single-point overheating. This optimization of heat distribution helps to improve the thermal management efficiency of the entire battery protection board and extend its service life.

[0068] When the welding part 22 is arranged on the surface of the main body 21 away from the groove 23, the functions of this design are mainly reflected in: placing the welding part 22 on the surface of the main body 21 away from the groove 23 can reduce the interference with the internal structure of the groove 23 during the manufacturing process, and reduce the processing difficulty and cost. At the same time, since the welding part 22 is directly welded on the first surface 11, the space can be utilized more effectively, the thickness of the welding part 22 can be reduced, the solder can be saved, and the welding difficulty can be reduced. At the same time, in specific implementation, two welding parts 22 can be arranged at opposite ends of the main body 21 while the welding part 22 is arranged on the surface of the main body 21 away from the groove 23.

[0069] For those that are the same as those in Embodiment 1, they will not be elaborated in this embodiment.

[0070] Embodiment 3

[0071] As Figure 1-4 shown, in order to further illustrate the working principle of the conductor 2, in this embodiment, the body part 1 is further defined as a PCB board (rigid board) and includes a charge-discharge circuit. One end of the conductor 2 is electrically connected to the input end of the charge-discharge circuit, and the other end of the conductor 2 is electrically connected to the output end of the charge-discharge circuit; the material of the heat-conducting layer 4 is an insulating material. Among them, the PCB board is used as the base material of the battery protection board, and its stable electrical performance and structural strength provide a basis for the operation of the entire battery protection board. By electrically connecting one end of the conductor 2 to the input port of the charge-discharge circuit of the PCB board and the other end to the output end, the smooth transmission and distribution of electric energy through the conductor 2 are realized.

[0072] In the selection of the heat-conducting layer 4, the use of insulating materials is for safety considerations. Insulating materials can effectively isolate the current, prevent damage or fire caused by short circuits inside electronic components or circuit boards, and provide additional safety protection for the battery protection board. At the same time, insulating materials usually also have good heat conduction performance, and can effectively dissipate the heat generated by the conductor 2 while ensuring insulation, maintaining the stable operation of the system.

[0073] Further, an input terminal and an output terminal, both of which are welded to the main body 21 and are located outside the first cavity 3, are electrically connected to the input end of the charge and discharge circuit and the output end of the charge and discharge circuit, respectively. Since the input terminal and the output terminal need to be externally connected to a battery device, their design should not only meet the requirements of electrical connection, but also consider the compatibility with external devices and the stability of connection. In this embodiment, both the input terminal and the output terminal are welded to the outside of the first cavity 3 of the main body 21. Such a layout facilitates the access and fixation of external wires, and at the same time reduces the electrical problems that may be caused by improper welding positions. The input terminal is directly connected to the input circuit of the PCB board to ensure that electric energy is smoothly introduced into the battery protection board from an external power source; while the output terminal is electrically connected to the output end of the charge and discharge circuit to output the electric energy processed by the protection board to the battery or other load devices. Such a design not only simplifies the circuit layout, but also improves the efficiency and safety of electric energy transmission.

[0074] In summary, in this embodiment, by further optimizing the structural design of the battery protection board, closely combining the conductor 2 with the PCB board, and introducing the insulating and highly efficient heat-conducting layer 4 material, not only the electrical performance and heat management ability of the battery protection board are improved, but also its overall safety and reliability are enhanced.

[0075] For those that are the same as those in Embodiment 1, they will not be elaborated in this embodiment.

[0076] Embodiment 4

[0077] As Figure 1-4 shown, different from Embodiment 1: This embodiment relates to a fast-charging battery, which includes any of the above-mentioned battery protection boards. Its working mode is as follows:

[0078] The fast-charging battery involved in this embodiment integrates all the above-mentioned design improvements regarding the battery protection board. This means that from the layout of the conductor 2, the design of the groove 23 and the welding part 22, to the application of the insulating and highly efficient heat-conducting layer 4 material, they can all be reflected in the fast-charging battery of this embodiment.

[0079] During actual use, this fast-charging battery can quickly respond to the charging demand. At the same time, the effective application of the heat-conducting layer 4 material ensures that the heat generated by the battery during fast charging can be quickly dissipated, avoiding potential safety hazards caused by local overheating. This highly efficient heat management ability not only extends the service life of the battery, but also improves the user's charging experience. For those that are the same as those in Embodiment 1, they will not be elaborated in this embodiment.

[0080] In summary, under the conditions of the same charging power, loop devices, and the same size of the protection board, the fast-charging battery of this embodiment can reduce the temperature rise; under the premise of the same charging power, the same temperature rise requirement, and the same battery size, the fast-charging protection board of this embodiment can increase the capacity of the PACK by narrowing the board frame.

[0081] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery protection board, comprising a body part (1), characterized in that: The body part (1) includes a first surface (11) and a second surface (12) facing away from each other. The first surface (11) is provided with a conductor (2) and a heat-conducting layer (4). There is a first cavity (3) between the conductor (2) and the first surface (11), and the heat-conducting layer (4) is located within the first cavity (3).

2. The battery protection board according to claim 1, characterized in that: The heat-conducting layer (4) is in contact with the conductor (2).

3. The battery protection board according to claim 1, characterized in that: The conductor (2) is welded to the first surface (11); The conductor (2) is welded to the first surface (11) by soldering.

4. The battery protection board according to claim 3, wherein: The conductor (2) includes a main body (21) and a welding part (22). A groove (23) is formed on the surface of the main body (21) close to the first surface (11). The groove (23) and the first surface (11) together form the first cavity (3). The welding part (22) is arranged at one end of the main body (21) close to the first surface (11).

5. The battery protection board according to claim 4, wherein: There are two welding parts (22), which are respectively located at opposite ends of the main body (21); and / or, The welding part (22) is arranged on the surface of the main body (21) facing away from the groove (23).

6. The battery protection board according to claim 1, wherein: The heat-conducting layer (4) is solidified and formed within the first cavity (3).

7. The battery protection board according to claim 1, characterized in that: The body part (1) is a PCB board. The body part includes a charge and discharge circuit. One end of the conductor (2) is electrically connected to the input end of the charge and discharge circuit, and the other end of the conductor (2) is electrically connected to the output end of the charge and discharge circuit; The material of the heat-conducting layer (4) is an insulating material.

8. The battery protection board according to claim 7, wherein: An input terminal and an output terminal, both located outside the first cavity (3), are welded to the body part (1). The input terminal is electrically connected to the input end of the charge and discharge circuit, and the output terminal is electrically connected to the output end of the charge and discharge circuit.

9. The battery protection board according to claim 7, wherein: The material of the heat-conducting layer (4) is a polyurethane material.

10. A fast-charging battery, characterized in that, It includes the battery protection board according to any one of claims 1 to 9.

Images