A battery pack with a fuse

Abstract

The utility model provides a battery pack with fuse, the first windowing of battery pack front panel subassembly is installed with fuse, and the fuse includes fuse holder and openable fuse cover, and the fuse holder and fuse cover are fixed on the inner wall and outer wall side of battery pack front panel subassembly respectively, when needing to replace the fuse core, only need to open the fuse cover to operate, need not to disassemble battery pack box body, and the maintenance efficiency is greatly improved, the trigger rod extending towards the direction of fuse holder is equipped on the fuse cover, and the trigger rod and the trigger end of micro -switch are correspondingly set, when the fuse cover opens, the trigger rod is synchronous from micro -switch, and micro -switch resets and sends state signal to the controller, and the controller responds to state signal and disconnects the high voltage circuit of battery pack, realizes the safe protection function of opening automatic power off.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, specifically to a battery pack with a fuse. Background Technology

[0002] With the rapid development of new energy vehicles, the safety and maintainability of the power battery pack, as a core component of the vehicle, are receiving increasing attention. In existing technologies, battery packs typically integrate fuses to promptly cut off the high-voltage circuit in case of overcurrent or short-circuit faults, protecting the battery and electrical equipment. However, existing fuses are mostly fixedly installed inside the battery pack housing. When the fuse element blows and needs replacement, maintenance personnel must first remove the fuse cover from the battery pack to access the fuse for operation. This disassembly and reassembly process is cumbersome and time-consuming, resulting in low maintenance efficiency. Furthermore, because the fuse is located inside the battery pack, maintenance personnel are prone to touching surrounding high-voltage circuits and live components during replacement, posing a safety hazard such as electric shock and threatening personal safety. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to overcome the defects of cumbersome maintenance and low safety in the prior art, so as to provide a battery pack with fuse that is easy to replace and has high safety.

[0004] Therefore, this utility model provides a battery pack with a fuse, including a front panel assembly of the battery pack. The front panel assembly of the battery pack has a first window, and a fuse is installed at the first window. The fuse includes a fuse holder and an openable fuse cover. The fuse holder and the fuse cover are respectively fixed to the inner wall and outer wall of the front panel assembly of the battery pack. The fuse holder is equipped with a fuse element, two terminal blocks and a micro switch respectively connected to the two ends of the fuse element. The fuse cover is provided with a trigger rod extending towards the fuse holder, and the trigger rod is correspondingly set with the trigger end of the micro switch.

[0005] When the fuse cover is closed, the trigger rod presses against the trigger terminal of the micro switch, the micro switch is in the ON state, and the high-voltage circuit of the battery pack is turned on; when the fuse cover is opened to replace the fuse element, the trigger rod is simultaneously disengaged from the micro switch along with the fuse cover, the micro switch is reset and sends a status signal to the controller, and the controller responds to the status signal and disconnects the high-voltage circuit of the battery pack.

[0006] The fuse holder has an opening at the bottom that communicates with the inside of the battery pack. The fuse core includes a fuse core body and L-shaped conductive plates disposed on both sides of the fuse core body. The L-shaped conductive plates have a first connecting plate located inside the fuse holder and connected to the terminal block, and a second connecting plate disposed perpendicular to the first connecting plate. The second connecting plate passes through the opening and extends from the rear side of the fuse holder. The two sides of the fuse core body are fixedly connected to the corresponding second connecting plates.

[0007] The front panel assembly of the battery pack includes a first vertical plate and a second vertical plate arranged opposite to each other, and a first horizontal plate and a second horizontal plate arranged opposite to each other. The first vertical plate, the second vertical plate, the first horizontal plate and the second horizontal plate enclose each other to form a frame structure. The frame structure has a receiving cavity for installing the fuse holder. The first vertical plate has a first opening formed in the middle, and the second vertical plate has a second opening arranged opposite to the fuse holder. Part or all of the fuse core body extends out of the second opening to the outside of the frame structure.

[0008] The fuse cover is fixed to the first upright plate by a plurality of first screws, and at least one annular sealing ring is installed on the side of the fuse cover facing the first upright plate, the annular sealing ring being arranged around the edge of the first opening.

[0009] The outer wall of the fuse cover has multiple heat dissipation ribs that are spaced apart along its circumference.

[0010] The terminal block includes a third connecting plate, a fourth connecting plate, and a fifth connecting plate that are integrally connected. The third connecting plate is used to be fixedly connected to the first connecting plate. The fourth connecting plate is embedded in the fuse holder by injection molding. The fifth connecting plate extends out of the fuse holder.

[0011] The fuse holder has an annular rib formed on the side facing the first vertical plate that abuts against the edge of the first window.

[0012] The fuse holder is fixed to the inner wall of the first vertical plate by a plurality of second screws.

[0013] The technical solution of this utility model has the following advantages: 1. The battery pack with fuse provided by this utility model fixes the fuse holder and fuse cover to the inner and outer walls of the front panel assembly of the battery pack, respectively. When the fuse element needs to be replaced, only the fuse cover needs to be opened for operation, without disassembling the battery pack body, which greatly improves maintenance efficiency. The fuse cover is provided with a trigger rod extending towards the fuse holder. The trigger rod is correspondingly set with the trigger end of the micro switch. When the fuse cover is opened, the trigger rod disengages from the micro switch simultaneously. The micro switch resets and sends a status signal to the controller. The controller responds to the status signal and disconnects the high-voltage circuit of the battery pack, realizing the safety protection function of automatic power-off when the cover is opened.

[0014] 2. The battery pack with fuse provided by this utility model has an opening at the bottom of the fuse holder that communicates with the inside of the battery pack. The second connecting plate of the L-shaped conductive plate can directly pass through the opening and extend from the rear side of the fuse holder, so that the fuse element is installed on the outside of the fuse holder. This reduces the thickness of the fuse holder and does not increase the volume of the original battery pack. On the other hand, the opening and the second opening cooperate with each other to allow air inside the battery pack and frame structure to circulate to the inside of the fuse holder. The heat generated by the fuse element can be directly dissipated to the outside through the opening and the second opening, which is conducive to the fuse element using the air inside the battery pack and frame structure for convection heat dissipation. This significantly improves the heat dissipation efficiency of the fuse element and reduces the risk of the fuse element melting prematurely due to excessive temperature.

[0015] 3. The battery pack with fuse provided by this utility model includes a front panel assembly comprising a first and a second vertical plate arranged opposite each other front to back, and a first and a second horizontal plate arranged opposite each other vertically, forming a frame structure. The frame structure has a cavity for mounting the fuse holder, which is embedded in the cavity. The thickness of the fuse holder in the front-back direction is accommodated by the distance between the first and second vertical plates, making full use of the space inside the frame structure instead of protruding beyond the front panel of the battery pack. Therefore, it does not increase the overall volume of the original battery pack in the front-back direction, ensuring a compact overall structure of the battery pack. The second vertical plate has a second opening opposite to the fuse holder, and part or all of the fuse core extends from the second opening to the outside of the frame structure, further enhancing the heat dissipation effect of the fuse core.

[0016] 4. The battery pack with fuse provided by this utility model has a fuse cover fixed to a first upright plate by multiple first screws, and at least one annular sealing ring is installed on the side of the fuse cover facing the first upright plate, which effectively improves the waterproof and dustproof performance of the fuse installation position and ensures the reliability of the battery pack in harsh environments.

[0017] 5. The battery pack with fuse provided by this utility model has multiple heat dissipation ribs formed on the outer wall of the fuse cover, which are distributed circumferentially, further enhancing the heat dissipation capacity of the fuse cover and helping to quickly dissipate the heat generated when the fuse core is working.

[0018] 6. The battery pack with fuse provided by this utility model has a fourth connecting plate that is injection molded and embedded in the fuse holder, making the terminal block and the fuse holder an integrated structure. The terminal block is more firmly and reliably fixed, and will not shift or loosen even under vehicle vibration or multiple fuse replacement conditions. At the same time, the third connecting plate is fixedly connected to the first connecting plate, and the fifth connecting plate extends out of the fuse holder, forming a stable conductive path that runs through the inside and outside. When replacing the fuse, only the fuse body needs to be removed, and the terminal block remains fixed in the fuse holder without disassembly, simplifying maintenance operations and reducing the risk of poor contact caused by frequent disassembly and assembly. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a first perspective view of the fuse of this utility model installed on the front panel assembly of the battery pack; Figure 2 for Figure 1 A magnified schematic diagram of the part after the fuse cover has been removed; Figure 3 A second perspective view of the fuse installed on the front panel assembly of the battery pack; Figure 4 for Figure 3 Enlarged schematic diagram of the middle section; Figure 5 Side view of the fuse installed on the front panel assembly of the battery pack; Figure 6 This is an exploded structural diagram of the fuse and battery pack front panel assembly. Figure 7 This is a schematic diagram of the assembly of the fuse holder, fuse element, and micro switch. Figure 8 This is a cross-sectional view of the fuse holder, fuse element, and micro switch. Figure 9 A 3D view of the fuse holder; Figure 10 This is a 3D view of the fuse cover.

[0021] Explanation of reference numerals in the attached drawings: 1. Front panel assembly of battery pack; 2. First window; 3. Fuse; 4. Fuse holder; 5. Fuse cover; 6. Fuse core; 7. Terminal block; 8. Micro switch; 9. Trigger rod; 11. Opening; 12. Fuse core body; 13. L-shaped conductive plate; 14. First connecting plate; 15. Second connecting plate; 16. First vertical plate; 17. Second vertical plate; 18. First horizontal plate; 19. Second horizontal plate; 21. Receiving cavity; 22. Second window; 23. First screw; 24. Annular sealing ring; 25. Heat dissipation fin; 26. Third connecting plate; 27. Fourth connecting plate; 28. Fifth connecting plate; 29. ​​Annular rib; 30. Second screw. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] Example This embodiment provides a battery pack with a fuse, such as Figure 1 , Figure 3 and Figure 5As shown, it includes a battery pack front panel assembly 1 and a fuse 3.

[0027] Battery pack front panel assembly 1, such as Figure 5 As shown, it includes a first vertical plate 16 and a second vertical plate 17 arranged front to back, and a first horizontal plate 18 and a second horizontal plate 19 arranged vertically opposite each other. The first vertical plate 16, the second vertical plate 17, the first horizontal plate 18, and the second horizontal plate 19 enclose a frame structure. The frame structure has a receiving cavity 21 for installing the fuse holder 4, as shown. Figure 2 As shown, a first window 2 is formed in the middle of the first upright plate 16, as... Figure 4 As shown, the second upright plate 17 is formed with a second opening 22 opposite to the fuse holder 4, and part or all of the fuse core body 12 extends out of the second opening 22 to the outside of the frame structure.

[0028] Fuse 3 is installed at the first window 2, such as Figure 5 As shown, it includes a fuse holder 4 and an openable fuse cover 5, which are respectively fixed to the inner and outer walls of the battery pack front panel assembly 1 (first upright plate 16).

[0029] Fuse holder 4, such as Figure 3 , Figure 4 and Figure 6 As shown, it is fixed to the inner wall of the first upright plate 16 by multiple second screws 30, as... Figure 7 and Figure 8 As shown, a fuse holder 4 is equipped with a fuse element 6, two terminal blocks 7 connected to both ends of the fuse element 6, and a micro switch 8. The fuse cover 5 has a trigger rod 9 extending towards the fuse holder 4, and the trigger rod 9 is correspondingly positioned to the trigger end of the micro switch 8. Figure 9 As shown, the fuse holder 4 has an opening 11 at its bottom that communicates with the inside of the battery pack. The fuse element 6 includes a fuse element body 12 and L-shaped conductive plates 13 disposed on both sides of the fuse element body 12. The L-shaped conductive plates 13 have a first connecting plate 14 located inside the fuse holder 4 and connected to the terminal block 7, and a second connecting plate 15 disposed perpendicularly to the first connecting plate 14. The second connecting plate 15 passes through the opening 11 and extends from the rear side of the fuse holder 4. The two sides of the fuse element body 12 are fixedly connected to the corresponding second connecting plates 15. The terminal block 7 includes a third connecting plate 26, a fourth connecting plate 27, and a fifth connecting plate 28 integrally connected. The third connecting plate 26 is used to fixally connect to the first connecting plate 14. The fourth connecting plate 27 is embedded in the fuse holder 4 by injection molding. The fifth connecting plate 28 extends out of the fuse holder 4. The fuse holder 4 has an annular rib 29 formed on the side facing the first upright plate 16, which abuts against the edge of the first window 2.

[0030] like Figure 6 and Figure 10 As shown, the fuse cover 5 is fixed to the first upright plate 16 by a plurality of first screws 23. At least one annular sealing ring 24 is installed on the side of the fuse cover 5 facing the first upright plate 16, and the annular sealing ring 24 is arranged around the edge of the first opening 2. A plurality of heat dissipation ribs 25 are formed on the outer wall of the fuse cover 5 at intervals along its circumference.

[0031] When the fuse cover 5 is closed, the trigger rod 9 presses against the trigger end of the micro switch 8, and the micro switch 8 is in the ON state, thus connecting the high-voltage circuit of the battery pack. When the fuse cover 5 is opened to replace the fuse element 6, the trigger rod 9 disengages from the micro switch 8 synchronously with the fuse cover 5. The micro switch 8 resets and sends a status signal to the controller. The controller responds to the status signal and disconnects the high-voltage circuit of the battery pack.

[0032] The battery pack with fuse provided by this utility model fixes the fuse holder 4 and fuse cover 5 to the inner and outer walls of the front panel assembly 1 of the battery pack, respectively. When the fuse element 6 needs to be replaced, only the fuse cover 5 needs to be opened for operation, without disassembling the battery pack body, which greatly improves maintenance efficiency. The fuse cover 5 is provided with a trigger rod 9 extending towards the fuse holder 4. The trigger rod 9 is correspondingly set with the trigger end of the micro switch 8. When the fuse cover 5 is opened, the trigger rod 9 is simultaneously disengaged from the micro switch 8. The micro switch 8 is reset and sends a status signal to the controller. The controller responds to the status signal and disconnects the high voltage circuit of the battery pack, realizing the safety protection function of automatic power-off when the cover is opened.

[0033] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A battery pack with a fuse, characterized in that, include: A battery pack front panel assembly (1) has a first window (2) thereon. A fuse (3) is installed at the first opening (2) and includes a fuse holder (4) and an openable fuse cover (5). The fuse holder (4) and the fuse cover (5) are respectively fixed to the inner wall and outer wall of the front panel assembly (1) of the battery pack. A fuse core (6) and a micro switch (8) are installed on the fuse holder (4). A trigger rod (9) extending toward the fuse holder (4) is provided on the fuse cover (5). The trigger rod (9) is correspondingly set with the trigger end of the micro switch (8). When the fuse cover (5) is closed, the trigger rod (9) presses against the trigger end of the micro switch (8), the micro switch (8) is in the ON state, and the high voltage circuit of the battery pack is turned on; when the fuse cover (5) is opened to replace the fuse element (6), the trigger rod (9) is simultaneously disengaged from the micro switch (8) along with the fuse cover (5), the micro switch (8) is reset and sends a status signal to the controller, the controller responds to the status signal and disconnects the high voltage circuit of the battery pack; The bottom of the fuse holder (4) is provided with an opening (11) communicating with the inside of the battery pack. The fuse core (6) includes a fuse core body (12) and L-shaped conductive plates (13) respectively disposed on both sides of the fuse core body (12). The L-shaped conductive plate (13) has a first connecting plate (14) located inside the fuse holder (4) and a second connecting plate (15) arranged perpendicularly to the first connecting plate (14). The second connecting plate (15) passes through the opening (11) and extends from the rear side of the fuse holder (4). The two sides of the fuse core body (12) are fixedly connected to the corresponding second connecting plate (15). The front panel assembly (1) of the battery pack includes a first vertical plate (16) and a second vertical plate (17) arranged opposite to each other in front and back, and a first horizontal plate (18) and a second horizontal plate (19) arranged opposite to each other in the top and bottom. The first vertical plate (16), the second vertical plate (17), the first horizontal plate (18) and the second horizontal plate (19) form a frame structure. The frame structure has a receiving cavity (21) for installing the fuse holder (4). The first window (2) is formed in the middle of the first vertical plate (16). The second vertical plate (17) is formed with a second window (22) arranged opposite to the fuse holder (4). Part or all of the fuse core body (12) extends out of the second window (22) to the outside of the frame structure.

2. The battery pack with a fuse according to claim 1, characterized in that, The fuse cover (5) is fixed to the first upright plate (16) by a plurality of first screws (23). At least one annular sealing ring (24) is installed on the side of the fuse cover (5) facing the first upright plate (16). The annular sealing ring (24) is arranged around the edge of the first opening (2).

3. The battery pack with a fuse according to claim 1, characterized in that, The outer wall of the fuse cover (5) has multiple heat dissipation ribs (25) that are spaced apart along its circumference.

4. The battery pack with a fuse according to claim 1, characterized in that, The fuse holder (4) has an annular rib (29) formed on the side facing the first upright plate (16) that abuts against the edge of the first window (2).

5. The battery pack with a fuse according to claim 1, characterized in that, The fuse holder (4) is fixed to the inner wall of the first upright plate (16) by a plurality of second screws (30).

Images