Battery pack intelligent fuse external system

Abstract

The utility model provides a kind of battery pack intelligent fuse external system, including battery pack body and fusing module, fusing module is set to the outside of battery pack body, including protection box, fuse and connecting copper bar, fuse and connecting copper bar are fixed in protection box, realize the electrical connection of fuse and battery pack using connecting copper bar;The detachable end cap on protection box can install and dismount inside fuse, by moving PSS intelligent fuse from battery pack inside to outside, form independent fusing module, reduce the occupation to battery pack inside space, and combine vertical installation direction and horizontal copper bar design of leading out, on the basis of ensuring electrical connection stability, significantly simplify battery pack inside layout, optimize battery pack inside design, and do not need to dismount battery pack when maintenance replacement, simple operation, high efficiency;Realize the comprehensive improvement of maintenance convenience, heat dissipation optimization, space utilization and production economy.

Description

Technical Field

[0001] This utility model belongs to the field of power battery technology, specifically relating to an installation structure for a battery pack intelligent fuse system. Background Technology

[0002] A key component of electric and hybrid vehicles is their high-voltage battery pack, which stores the energy required for vehicle operation. These battery packs not only need to efficiently store and release energy but also ensure operational safety. Battery pack safety involves multiple layers, including but not limited to over-temperature protection, overcharge protection, short-circuit protection, and overload protection. Under such operating conditions, PSS (Pyrotechnical Safety Switches) become a crucial component. They differ fundamentally from and offer advantages over traditional fuses, which are typically one-time protection elements. PSS fuses, on the other hand, can be programmed and reset, providing greater flexibility and better protection. By connecting PSS fuses in series with the battery module and high-voltage control unit, the circuit can be quickly disconnected in case of battery abnormalities, protecting the battery module and preventing more serious problems caused by short circuits or overheating. Furthermore, the introduction of PSS enhances the intelligence level of the entire battery management system, facilitating refined energy management and protection strategies. With technological advancements, PSS fuses are gradually becoming an indispensable high-end configuration in high-performance battery pack designs.

[0003] In battery pack design, the battery management system and electrical control unit are core components, responsible for monitoring and controlling the battery pack's operating status to ensure optimal safety and efficiency. PSS smart fuses are typically integrated into the battery pack along with the high-voltage control box and connected in series with the battery modules. This layout is designed to quickly cut off power in case of circuit malfunctions, preventing damage and safety risks. However, this built-in design can present challenges in terms of serviceability and thermal management, not only increasing the internal space occupied by the battery pack but also leading to higher maintenance and replacement costs and time. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an external battery pack smart fuse system that moves the PSS smart fuse from inside the battery pack to the outside. This effectively solves the problems of installation complexity and thermal management of PSS smart fuses inside the battery pack, reduces maintenance difficulty, improves battery pack production efficiency and reliability, reduces the space occupied inside the battery pack, optimizes battery pack design, increases battery energy density, improves battery pack performance, and features a simple modular design for easy installation, maintenance, and replacement, thus enhancing configuration flexibility.

[0005] To achieve the above and other related objectives, this utility model provides an external intelligent fuse system for battery packs, comprising:

[0006] Battery pack body;

[0007] A fuse module, wherein the fuse module is disposed outside the battery pack body, the fuse module comprising:

[0008] A protective box, the interior of which forms a receiving cavity;

[0009] A fuse, wherein the fuse is installed into the receiving cavity along a first direction;

[0010] A connecting copper busbar is disposed inside the protective box. One end of the connecting copper busbar is connected to the fuse, and the other end extends out of the receiving cavity along the second direction and is electrically connected to the interior of the battery pack body. The first direction is perpendicular to the second direction.

[0011] In an optional embodiment of this utility model, the protective box includes a box body and an end cap mounted on one side of the box body. The box body has a first mounting surface and a second mounting surface. The battery pack body includes a tray. The first mounting surface is sealed to the side beam of the tray. The second mounting surface is sealed to the end cap. The first mounting surface is perpendicular to the second mounting surface.

[0012] In an optional embodiment of this utility model, a first mounting port and a second mounting port are respectively formed on the first mounting surface and the second mounting surface. The fuse enters the receiving cavity from the second mounting port along the first direction, and the connecting copper busbar is led out of the receiving cavity from the second mounting port along the second direction.

[0013] In an optional embodiment of this utility model, the outline shape of the first mounting port is consistent with the structure of the fuse, forming an installation guide path in the first direction, and the fuse enters the receiving cavity along the first mounting port.

[0014] In an optional embodiment of this utility model, a bracket is provided inside the box, and the fuse and the connecting copper busbar are fixed on the bracket.

[0015] In an optional embodiment of this utility model, the bracket includes a copper busbar bracket, which is supported on one side of the connecting copper busbar and extends out of the receiving cavity along the first mounting port.

[0016] In an optional embodiment of the present invention, a connecting groove is formed on the first mounting surface of the box body, and a first sealing member is installed in the connecting groove to seal the box body and the tray.

[0017] In an optional embodiment of this utility model, a second sealing element is provided between the second mounting surface and the end cap to achieve a sealed connection between the end cap and the box body.

[0018] In an optional embodiment of this utility model, the fuse is provided with connecting portions at both ends, and the connecting portions and the connecting copper busbar are respectively provided with connecting holes. The connecting parts are connected with the connecting holes to fix the connecting copper busbar and the fuse to the bracket.

[0019] In an optional embodiment of this utility model, the connecting copper busbar is connected and fixed to the copper busbar inside the battery pack body through the copper busbar bracket, and a heat dissipation component is provided at the connection point.

[0020] The technical advantages of this invention are as follows: By independently arranging the fuse outside the battery pack body, the structural design of the fuse module simplifies and expedites maintenance and replacement, reducing downtime and maintenance costs; the modular design facilitates expansion or configuration according to different application needs and battery capacities, increasing the flexibility of the battery system; the specifications and functions of the PSS can be easily adjusted between different types of electric vehicles without redesigning the entire battery pack, increasing configuration flexibility; freeing the PSS from the limitations of the confined space and high-temperature environment inside the battery pack, it can dissipate heat more effectively, thereby improving its reliability and lifespan; in emergency situations, such as short circuits or other faults, the external... The PSS (Power Switch) located in the center can quickly disconnect the power supply, reducing the risk of battery damage, improving the overall system safety, reducing the space occupied inside the battery pack, allowing for a more compact battery cell design, increasing the number of battery cells, and improving the energy density of the battery pack. Combined with the vertical mounting direction and horizontally led-out copper busbar design, it significantly simplifies the internal layout of the battery pack while ensuring electrical connection stability, reducing complex electrical wiring inside the battery pack, and lowering the complexity of the battery management system. It simplifies the battery pack assembly and manufacturing process, thereby reducing production costs. The externally arranged structure facilitates real-time monitoring of the working status of the fuse module, and can quickly diagnose problems in case of failure, improving the maintainability of the system. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the fuse module in an optional embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the fuse module in an optional embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the fuse module in an optional embodiment of the present invention;

[0025] Figure 4 This is a front view of the fuse module in an optional embodiment of the present invention;

[0026] Figure 5 This is a cross-sectional view of the fuse module in an optional embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the protective box and the connecting copper busbar in an optional embodiment of the present invention;

[0028] Figure 7 This is a cross-sectional view of the connection structure between the protective box and the connecting copper busbar in an optional embodiment of this utility model;

[0029] Figure 8 This is a schematic diagram of the fuse structure in an optional embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the connection structure between the fuse module and the battery pack body in an optional embodiment of the present invention.

[0031] Label Explanation:

[0032] 100. Protective box; 200. Fuse; 300. Connecting copper busbar; 400. First seal; 500. Second seal; 600. Heat sink;

[0033] 110. Box body; 120. End cap; 130. Bracket; 210. Connecting part;

[0034] 111. First mounting surface; 112. Second mounting surface; 1111. First mounting port; 1121. Second mounting port;

[0035] 131. Fuse bracket; 132. Copper busbar bracket. Detailed Implementation

[0036] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0037] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0038] In traditional battery pack designs, the PSS (Power Switch System) smart fuse is typically integrated inside the battery pack with the high-voltage control box and connected in series with the battery modules to achieve rapid power-off protection in case of circuit abnormalities. However, this structure requires disassembling the entire battery pack for maintenance or PSS replacement, which is time-consuming and costly. The combined heat from the battery's internal heating and the fuse's own operating heat can easily lead to fuse overheating and failure. Furthermore, the embedded PSS occupies internal space in the battery pack, reducing battery energy density, and the fuse installation complicates internal wiring, affecting module layout and structural stability. In contrast, the external structure design of the battery pack smart fuse requires ensuring the overall sealing, installation stability, and ease of maintenance of the battery system.

[0039] Please see Figures 1 to 9 This utility model provides an external intelligent fuse system for battery packs. The system includes a battery pack body and a fuse module. The fuse module is located outside the battery pack body. By moving the PSS intelligent fuse 200 from inside the battery pack body to the outside, an independent fuse module is formed, reducing the space occupied inside the battery pack. Through the special structural design of the fuse module, the internal layout of the battery pack is significantly simplified and the internal design of the battery pack is optimized while ensuring the stability of the electrical connection. It also makes maintenance convenient, simple to operate, and highly efficient.

[0040] Please see Figures 1 to 8In an optional embodiment of this utility model, the fuse module includes a protective box 100, a fuse 200, and a connecting copper busbar 300, which are fixed inside the protective box 100. The interior of the protective box 100 forms a receiving cavity, into which the fuse 200 is installed along a first direction (X-direction). The connecting copper busbar 300 is disposed inside the protective box 100, with one end connected to the fuse 200 and the other end extending out of the receiving cavity along a second direction (Y-direction), electrically communicating with the interior of the battery pack body. The first direction is perpendicular to the second direction. The fuse 200 is installed perpendicular to the direction of the connecting copper busbar 300. The fuse 200 is installed into the protection box 100 by insertion and is electrically connected to the battery pack body through the connecting copper busbar 300. The structure is compact and the electrical path is short. The fuse 200 and the copper busbar are installed separately in a vertical direction and will not interfere with each other. When replacing the fuse 200, it is not necessary to remove the entire battery pack. The internal fuse 200 can be directly disassembled and installed, which is simple and efficient.

[0041] Please see Figures 1 to 7 In one optional embodiment of this utility model, the protective box 100 includes a box body 110 and an end cap 120 mounted on one side of the box body 110. The box body 110 has a first mounting surface 111 and a second mounting surface 112. The battery pack body includes a tray. The first mounting surface 111 is sealed to the side beam of the tray, and the second mounting surface 112 is sealed to the end cap 120. The first mounting surface 111 is perpendicular to the second mounting surface 112. The end cap 120 and the box body 110 can be fixed together, for example, by bolts. The fuse 200 can be disassembled and installed by simply removing the bolts and opening the end cap 120. In other embodiments, a quick-release panel can be provided at the bottom of the protective box 100, which is connected to the box body 110 by a snap-fit. When the fuse 200 fails, the fuse 200 can be replaced simply by removing the bottom panel, without disassembling the entire protective box 100.

[0042] Please see Figures 1 to 7In an optional embodiment of this utility model, a first mounting port 1111 and a second mounting port 1121 are respectively formed on the first mounting surface 111 and the second mounting surface 112. The fuse 200 enters the receiving cavity from the second mounting port 1121 along a first direction, and the connecting copper busbar 300 exits the receiving cavity from the second mounting port 1121 along a second direction. Further, the outline shape of the first mounting port 1111 is consistent with the structure of the fuse 200, forming an installation guide path in the first direction, allowing the fuse 200 to enter the receiving cavity along the first mounting port 1111. The fuse 200 is installed in the protective box 100 by plugging and unplugging. The removable end cap 120 at the bottom facilitates quick replacement of faulty components. The installation guide path formed by the outline shape of the first mounting port 1111 facilitates installation of the fuse 200 from the bottom, ensuring correct installation position and more efficient operation.

[0043] Please see Figures 1 to 9 In an optional embodiment of this utility model, the protective box 100 is sealed to the battery pack body, and the protective box 100 itself ensures a good seal to ensure the sealing safety of the battery system. Specifically, for example, a connecting groove can be formed on the first mounting surface 111 of the box body 110, and the first sealing member 400 is installed in the connecting groove to seal the box body 110 to the tray; a second sealing member 500 is provided between the second mounting surface 112 and the end cover 120 to achieve a sealed connection between the end cover 120 and the box body 110. The sealing member is, for example, a rubber ring, which is fitted into the connecting groove to prevent external environmental corrosion.

[0044] Please see Figures 1 to 7 In an optional embodiment of this utility model, a bracket 130 is further provided inside the housing 110 to fix the fuse 200 and the connecting copper busbar 300, ensuring connection stability and vibration resistance. A locking point is also provided at an appropriate position on the bracket 130 to secure the fuse 200 connection lines, ensuring neatness and stability of the lines. The bracket 130 may include, for example, a fuse bracket 131 and a copper busbar bracket 132. The bracket 130 and the housing 110 can be an integral structure. The fuse bracket 131 is disposed inside the housing 110, supporting and fixing the fuse 200. The copper busbar bracket 132 is supported on one side of the connecting copper busbar 300 and extends out of the receiving cavity along the first mounting opening 1111, connecting with the inside of the battery pack body together with the connecting copper busbar 300. The bracket 130 ensures that the fuse 200 operates stably when the battery pack body is working, and its performance is not affected by external forces such as vibration. A vibration damping layer can also be added to the bracket 130 to further ensure stability.

[0045] Please see Figures 1 to 8In one optional embodiment of this utility model, the fuse 200 has connecting portions 210 at both ends. Connecting portions 210 and connecting copper busbars 300 have corresponding connecting holes. Connecting components mate with the connecting holes to fix the connecting copper busbars 300 and the fuse 200 to the bracket 130. The connecting components are, for example, bolts and nuts. The connecting copper busbars 300 include a positive copper busbar and a negative copper busbar, respectively connected to the positive and negative terminals inside the battery pack body. The two ends of the fuse 200 are connected to the positive and negative copper busbars respectively and secured with nuts. The connecting copper busbars 300 extend from one side of the protection box 100 and connect to the copper busbars inside the battery pack body, capable of carrying the maximum current and maintaining electrical connection consistency, thus achieving electrical connection between the fuse 200 and the battery pack body. In other embodiments, a snap-fit ​​or spring-loaded structure can also be provided on the bracket 130, allowing the fuse 200 to be simply inserted and secured by the elastic structure during installation.

[0046] Please see Figures 1 to 9 In an optional embodiment of this utility model, the fuse 200 can also integrate a diagnostic port on the outside of the end cover 120 of the protection box 100, which is connected to the fuse 200 via a wire to facilitate reading the working status and performing fault analysis; during maintenance, the status data of the fuse 200 can be read through a standard interface to achieve rapid fault location.

[0047] Please see Figures 1 to 9 In one optional embodiment of this utility model, the connecting copper busbar 300 and the copper busbar inside the battery pack body are connected and fixed by a copper busbar bracket 132, and a heat dissipation component 600 is provided at the connection point. The heat dissipation component 600 is, for example, an aluminum heat sink. The heat sink is fixed to the copper busbar bracket 132 by screws. Thermally conductive adhesive can also be added to enhance heat dissipation capacity. The connection point is efficiently cooled by the internal cooling system of the battery pack body. In other embodiments, the external fuse 200 can also be configured with a separate heat dissipation device to avoid the impact of heat accumulation inside the battery pack body on the performance of the fuse 200. For example, heat dissipation devices such as heat sinks or fans can be integrated into the protective box 100 to ensure that the fuse 200 can effectively dissipate heat and prevent overheating from causing a decrease in the performance of the fuse 200.

[0048] Please see Figures 1 to 9In an optional embodiment of this utility model, when the fuse module is externally connected to the battery pack body, the fuse module is connected to the side beam near the BDU (Battery Disconnect Unit) and away from heat sources and vibration zones to ensure the stable and reliable operation of the battery system. Specifically, the connecting copper busbar 300 is bolted to the internal copper busbar of the battery pack body, and the box body 110 of the protection box 100 is bolted to the side beam of the tray. The first mounting surface 111 is fitted with a sealing rubber strip to achieve a seal. The fuse 200 is inserted vertically into the protection box 100 and fixed to the connecting copper busbar 300. The end cap 120 is fixed to the second mounting surface 112 of the box body 110 with screws, and a second layer of sealing material is added between the end cap 120 and the box body 110. When the fuse 200 needs maintenance and replacement, simply lift the vehicle, open the bottom end cap 120, and remove the fuse 200 from the protection box 100 for replacement.

[0049] In summary, the external intelligent fuse system for battery packs of this invention places the PSS intelligent fuse 200 inside an independent protective box 100 outside the battery pack body. This simple arrangement allows for direct contact with the fuse 200 via a detachable end cap 120 for installation and removal. Maintenance and replacement do not require disassembling the internal structure of the battery pack body, reducing time and complexity. The external fuse module allows for a redistribution of space within the battery pack body, thereby improving energy density and storage capacity, reducing complex electrical connections within the battery pack body, and simplifying the design and manufacturing process. The simplified battery pack structure makes the production process more efficient, reducing labor and manufacturing costs. In emergencies such as short circuits or other faults, the external PSS can quickly disconnect the power supply, reducing the risk of battery damage and improving the overall system safety. The fuse module can also dissipate heat in a more spacious environment, avoiding overheating problems caused by the battery itself in the built-in design. Furthermore, the independent fuse module can be customized and adapted to the needs of different electric vehicle models and battery systems. For example, the external PSS can be designed in various specifications, improving the configuration flexibility of the battery pack and facilitating compatibility and adjustment between different electric vehicle models and battery systems.

[0050] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0051] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0052] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0053] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0054] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0055] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0056] The above description of the embodiments shown in this utility model (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the utility model.

[0057] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0058] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. An external intelligent fuse system for battery packs, characterized in that, include: Battery pack body; A fuse module, wherein the fuse module is disposed outside the battery pack body, the fuse module comprising: A protective box, the interior of which forms a receiving cavity; A fuse, wherein the fuse is installed into the receiving cavity along a first direction; A connecting copper busbar is disposed inside the protective box. One end of the connecting copper busbar is connected to the fuse, and the other end extends out of the receiving cavity along the second direction and is electrically connected to the interior of the battery pack body. The first direction is perpendicular to the second direction.

2. The external intelligent fuse system for battery packs according to claim 1, characterized in that, The protective box includes a box body and an end cap mounted on one side of the box body. The box body has a first mounting surface and a second mounting surface. The battery pack body includes a tray. The first mounting surface is sealed to the side beam of the tray. The second mounting surface is sealed to the end cap. The first mounting surface is perpendicular to the second mounting surface.

3. The external intelligent fuse system for battery packs according to claim 2, characterized in that, The first mounting surface and the second mounting surface are respectively formed with a first mounting port and a second mounting port. The fuse enters the receiving cavity from the second mounting port along the first direction, and the connecting copper busbar is led out of the receiving cavity from the second mounting port along the second direction.

4. The external intelligent fuse system for battery packs according to claim 3, characterized in that, The outline shape of the first mounting port is consistent with the structure of the fuse, forming an installation guide path in the first direction, and the fuse enters the receiving cavity along the first mounting port.

5. The external intelligent fuse system for battery packs according to claim 3, characterized in that, The box is equipped with a bracket, and the fuse and the connecting copper busbar are fixed on the bracket.

6. The external intelligent fuse system for battery packs according to claim 5, characterized in that, The bracket includes a copper busbar bracket, which is supported on one side of the connecting copper busbar and extends out of the receiving cavity along the first mounting port.

7. The external intelligent fuse system for battery packs according to claim 2, characterized in that, A connecting groove is formed on the first mounting surface of the box body, and a first sealing member is installed in the connecting groove to seal the box body and the tray.

8. The external intelligent fuse system for battery packs according to claim 2, characterized in that, A second sealing element is provided between the second mounting surface and the end cap to achieve a sealed connection between the end cap and the box body.

9. The external intelligent fuse system for battery packs according to claim 5, characterized in that, The fuse has connecting parts at both ends, and connecting holes are provided on the connecting copper busbars corresponding to the connecting parts. The connecting parts are connected to the connecting holes to fix the connecting copper busbars and the fuses to the bracket.

10. The external intelligent fuse system for battery packs according to claim 6, characterized in that, The connecting copper busbar is connected and fixed to the copper busbar inside the battery pack body through the copper busbar bracket, and a heat dissipation component is provided at the connection point.

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