External fuse box

Abstract

The utility model discloses an external fuse box which comprises a box body and fuses. The box body comprises a box seat and a box cover which are detachably connected, and a sealing ring clamped between the box seat and the box cover, and the box seat is matched with two conductive connecting pieces; the fuse is accommodated in the box body and is electrically connected with the two conductive connecting pieces; a circle of sealing part and a plurality of fixing parts located on the inner side of the sealing part are arranged on the side, away from the box cover, of the box base, the sealing part is matched with a circle of sealing gasket, and the fixing parts are matched with fixing nuts. According to the utility model, the fixing bolt and the conductive connecting piece which are used for locking the external fuse box and the battery pack are positioned in the airtight space formed between the box body and the battery pack, so that the fixing bolt is prevented from being rusted due to contact with outside air, and the box body and the battery pack can be effectively locked by the fixing bolt for a long time; the air tightness between the box body and the battery pack is further ensured; and meanwhile, the fuse is convenient to replace.

Description

Technical Field

[0001] This utility model relates to the field of battery packs, and in particular to an external fuse box. Background Technology

[0002] Existing battery packs are equipped with fuse boxes to reduce the impact of short circuits on the battery pack. The fuse boxes in battery packs are divided into external fuse boxes and internal fuse boxes. Internal fuse boxes are built into the battery pack, so replacing fuses in internal fuse boxes requires opening the battery pack, which is inconvenient. External fuse boxes are located outside the battery pack, so replacing fuses in external fuse boxes does not require opening the battery pack, making the operation more convenient.

[0003] However, existing external fuse boxes have the following problems:

[0004] 1. The existing external fuse box is attached to the outside of the battery pack by fixing bolts. The fixing bolts are exposed to the air and are prone to corrosion. After the fixing bolts are corroded, they will affect the tightening effect, resulting in a loose installation between the external fuse box and the battery pack and a risk of air leakage. Air leakage will affect the fuse.

[0005] 2. The existing external fuse box has a detachable connection between the box base and the box cover using connecting bolts, which makes disassembly between the box base and the box cover inconvenient.

[0006] 3. Existing external fuse boxes do not consider the application of spare fuses. As a result, if the fuse in the external fuse box blows and fails after protection, users generally have to buy a new fuse to replace it, which makes it impossible for users to replace the fuse immediately.

[0007] 4. Existing external fuse boxes typically connect fuses to the circuit via flexible inserts. In scenarios with continuous high current, these flexible inserts are prone to heat deformation, reducing the contact area between the fuse inserts and the circuit. Over time, this can lead to functional safety defects such as fuse loosening or poor contact.

[0008] In view of the above problems, it is necessary to study an external fuse box that can solve at least one of the problems of existing external fuse boxes. Utility Model Content

[0009] The purpose of this utility model is to provide an external fuse box that can solve at least one of the various problems of existing external fuse boxes.

[0010] To achieve the above objectives, the solution of this utility model is:

[0011] An external fuse box includes a box body and a fuse; the box body includes a detachably connected base and a cover, and a sealing ring sandwiched between the base and the cover, and the base is fitted with two conductive connectors; the fuse is housed in the box body and electrically connected to the two conductive connectors; the base has a sealing part on the side opposite to the cover and a plurality of fixing parts located inside the sealing part, the sealing part is fitted with a sealing gasket, and the fixing parts are fitted with fixing nuts.

[0012] The housing has two locking parts inside. The contact parts of the two conductive connectors are respectively fitted onto the two locking parts. The two ends of the fuse are respectively in contact with the contact parts of the two conductive connectors, and the two ends of the fuse are respectively locked onto the two locking parts by locking bolts. The locking bolts pass through the end of the fuse and the contact part of the conductive connector and are screwed into the locking parts.

[0013] The sealing part of the box base forms a groove, and the sealing gasket is fitted into the groove.

[0014] The box base forms an annular box base peripheral wall, and the box cover has an annular box cover peripheral wall. The box cover peripheral wall is inserted into the box base peripheral wall, and the sealing ring is sandwiched between the box cover peripheral wall and the box base peripheral wall.

[0015] The outer side of the box base is provided with a locking block; the box cover is equipped with a locking assembly that can be used to hook the locking block.

[0016] The box cover has a raised component connection part on its peripheral wall; the buckle assembly includes a buckle plate and a first return spring. The buckle plate has a buckling section, a pivot section and a control section in sequence. The buckling section of the buckle plate has a buckle hole that cooperates with the movable hook of the buckle block. The pivot section of the buckle plate is pivotally connected to the component connection part. The first return spring is sandwiched between the control section of the buckle plate and the peripheral wall of the box cover.

[0017] The component connection part of the box cover peripheral wall is provided with a limiting slot; the buckle assembly also includes a slide and a second return spring, the slide slides with the control section of the buckle plate and the second return spring is disposed between the slide and the control section, and the slide is provided with a limiting post that engages with the limiting slot.

[0018] The inner sides of the box cover's perimeter wall are provided with non-corresponding reinforcing plates.

[0019] The side of the box cover facing the box base is detachably fitted with a spare fuse.

[0020] The box cover is detachably fitted with a mounting partition on the side facing the box base via a snap-fit ​​connection. A spare fuse is clipped between the box cover and the mounting partition, and the spare fuse is inserted into the box cover.

[0021] After adopting the above solution, this utility model has the following characteristics:

[0022] 1. When the external fuse box of this utility model is installed into the battery pack, the box body and the battery pack are locked together by fixing bolts that are screwed into fixing nuts that cooperate with each fixing part. The sealing gasket of the sealing part is tightly clamped between the box body and the battery pack to ensure the airtightness between the two. Since each fixing part is located inside the sealing part, the fixing bolts are located in the airtight space formed between the box body and the battery pack, which prevents the fixing bolts from contacting the outside air and causing corrosion. This ensures that the fixing bolts can lock the box body and the battery pack for a long time and effectively, thereby ensuring the airtightness between the box body and the battery pack.

[0023] 2. This utility model uses bolts to fix the fuse, which can effectively fix the fuse and avoid problems such as loosening and poor contact of the fuse;

[0024] 3. The lid and base of this application can be disassembled and assembled without the need for tools, making disassembly and assembly convenient;

[0025] 4. This utility model is equipped with a spare fuse, which makes it convenient for users to directly replace the damaged fuse. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0027] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0028] Figure 3 Partial structural breakdown of this utility model Figure 1 .

[0029] Figure 4 Partial structural breakdown of this utility model Figure 2 .

[0030] Figure 5 Partial structural breakdown of this utility model Figure 3 .

[0031] Figure 6 A cross-sectional view of this utility model Figure 1 .

[0032] Figure 7 A cross-sectional view of this utility model Figure 2 .

[0033] Figure 8 A cross-sectional view of this utility model Figure 3 .

[0034] Figure 9 A cross-sectional view of this utility model Figure 4 .

[0035] Figure 10 This is a schematic diagram of the structure of the box lid of this utility model.

[0036] Label Explanation:

[0037] Box 1,

[0038] Box base 11, sealing part 111, groove 1111, fixing part 112, locking part 113, peripheral wall of box base 114, locking block 1141, vent hole 115.

[0039] Box lid 12, box lid peripheral wall 121, annular groove 1211, component connecting part 1212, limiting bayonet 1213, gripper 122, reinforcing piece 123, locking point 124.

[0040] Sealing ring 13,

[0041] Sealing gasket 14,

[0042] Fixing nut 15,

[0043] Locking bolt 16,

[0044] Locking nut 17,

[0045] Fuse 2,

[0046] Conductive connector 3, contact portion 31, connecting piece 32.

[0047] The fastener assembly 4 includes a fastener plate 41, a fastening section 411, a fastening hole 4111, a pivot section 412, a control section 413, a first return spring 42, a slide block 43, anti-slip texture 431, a limiting post 432, and a second return spring 44.

[0048] Spare fuse 5,

[0049] Install partition 6, clip 61, bending part 62, and release clip 63.

[0050] Fixing bolt A. Detailed Implementation

[0051] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0052] like Figures 1 to 10 As shown, this utility model discloses an external fuse box, which includes a box body 1 and a fuse 2; the box body 1 includes a detachably connected box base 11 and a box cover 12, and a sealing ring 13 sandwiched between the box base 11 and the box cover 12. The box base 11 is fitted with two conductive connectors 3 for connecting to the battery pack circuit; the fuse 2 is housed in the box body 1 and electrically connected to the two conductive connectors 3.

[0053] In an embodiment of this utility model, the box base 11 has a sealing part 111 and a plurality of fixing parts 112 located inside the sealing part 111 on the side opposite to the box cover 12. The sealing part 111 is fitted with a sealing gasket 14. When the external fuse box of this utility model is installed into the battery pack, the box body 1 and the battery pack are locked by fixing bolts A, which are screwed into fixing nuts 15 that cooperate with each fixing part 112. This ensures that the sealing gasket 14 of the sealing part 111 is tightly clamped between the box body 1 and the battery pack, thus ensuring the airtightness between the two. Since each fixing part 112 is located inside the sealing part 111, the fixing bolts A are located in the airtight space formed between the box body 1 and the battery pack, preventing the fixing bolts A from contacting the outside air and corroding. This ensures that the fixing bolts A can effectively lock the box body 1 and the battery pack for a long time, thereby ensuring the airtightness between the box body 1 and the battery pack.

[0054] In an embodiment of this utility model, the sealing part 111 of the box base 11 forms a groove 1111, and the sealing gasket 14 is fitted into the groove 1111 to prevent the sealing gasket 14 from shifting. The fixing nut 15 that cooperates with the fixing part 112 of the box base 11 is made of metal, which makes the fixing nut 15 strong, and the fixing nut 15 can be glued to the box base 11.

[0055] In an embodiment of this utility model, the housing 11 has two locking parts 113 inside, and the contact parts 31 of the two conductive connectors 3 respectively fit onto the two locking parts 113. The two ends of the fuse 2 respectively contact the contact parts 31 of the two conductive connectors 3 to realize the electrical connection between the fuse 2 and the conductive connectors 3. The two ends of the fuse 2 are respectively locked onto the two locking parts 113 by locking bolts 16. This bolt fixing method can effectively fix the fuse 2 and avoid the problems of loosening and poor contact of the fuse 2. The locking part 113 is equipped with a metal locking nut 17 for screwing into the locking bolt 16. The locking bolt 16 passes through the end of the fuse 2 and the contact part 31 of the conductive connector 3 and is screwed into the locking nut 17 that mates with the locking part 113. The locking nut 17 and the conductive connector 3 can be glued together with the housing 11. The conductive connector 3 has a connecting piece 32 located outside the housing 1 for connecting to the circuit of the battery pack. The connecting piece 32 is located inside the sealing part 111 to prevent the connecting piece 32 from being affected by the outside air.

[0056] In an embodiment of this utility model, the box base 11 forms an annular box base peripheral wall 114, and the box cover 12 has an annular box cover peripheral wall 121. The box cover peripheral wall 121 is inserted into the box base peripheral wall 114, and the sealing ring 13 is sandwiched between the box cover peripheral wall 121 and the box base peripheral wall 114 to ensure a seal between the box cover 12 and the box base 11. The outer side of the box cover peripheral wall 121 has an annular groove 1211, and the sealing ring 13 is fitted into the annular groove 1211 to prevent displacement of the sealing ring 13. The outer side of the lid 12 may be provided with a gripper 122 so that the user can apply force to pull the lid peripheral wall 121 out of the box seat peripheral wall 114. The inner sides of the lid peripheral wall 121 are provided with non-corresponding reinforcing pieces 123 to improve the strength of the lid 12. Moreover, since the reinforcing pieces 123 on the inner sides of the lid peripheral wall 121 are asymmetrical, this can play a foolproof role and prevent the box seat 11 and the lid 12 from being installed backwards. The side of the box seat 11 away from the lid 12 may be provided with a vent hole 115 located inside the sealing part 111 so that the lid peripheral wall 121 can be pulled out of the box seat peripheral wall 114.

[0057] In an embodiment of this utility model, a locking block 1141 is provided on the outer side of the peripheral wall 114 of the box base; and the box cover 12 is equipped with a locking assembly 4 that movably hooks the locking block 1141, so that the box cover 12 and the box base 11 are detachably connected. The peripheral wall 121 of the box cover is provided with a protruding component connecting portion 1212; and the locking assembly 4 includes a locking plate 41 and a first return spring 42. The locking plate 41 is provided with a locking section 411, a pivoting section 412, and a control section 413 in sequence. The locking section 411 of the locking plate 41 is provided with a locking hole 4111 that engages with the movable hook of the locking block 1141. The pivoting section 412 of the locking plate 41 is pivotally connected to the component connecting portion 1212. The first return spring 42 is sandwiched between the control section 413 of the locking plate 41 and the peripheral wall 121 of the box cover. The first return spring 42 can be inserted into and engaged with the locking plate 41 and the peripheral wall 121 of the box cover respectively to prevent the first return spring 42 from shifting. When the box base 11 is connected to the box cover 12, the peripheral wall 121 of the box cover is inserted into the peripheral wall 114 of the box base. The buckle hole 4111 of the buckle plate 41 is held in place by the first return spring 42 to hook the latch 1141 of the box base 11, thereby preventing the box base 11 and the box cover 12 from separating. When the box base 11 and the box cover 12 need to be separated, the user applies pressure to the control section 413 of the buckle plate 41 to make the buckle plate 41 rotate, thereby causing the buckle hole 4111 of the buckle plate 41 to disengage from the latch 1141 of the box base 11. At this time, the user can pull the peripheral wall 121 of the box cover out of the peripheral wall 114 of the box base to separate the box base 11 and the box cover 12. The connection and separation of the box base 11 and the box cover 12 in this way do not require the use of tools, making the disassembly and assembly of the box base 11 and the box cover 12 convenient.

[0058] In an embodiment of this utility model, the component connection portion 1212 of the peripheral wall 121 of the box cover is provided with a limiting slot 1213; and the buckle assembly 4 may further include a slide 43 and a second return spring 44. The slide 43 is slidably connected to the control section 413 of the buckle plate 41, and the second return spring 44 is disposed between the slide 43 and the control section 413. The slide 43 is provided with a limiting post 432 that is movably engaged with the limiting slot 1213. The slide 43 may be provided with anti-slip texture 431 to facilitate the movement of the slide 43. The cooperation between the limiting slot 1213 and the limiting post 432 can restrict the buckle plate 41 from rotating in the direction of the hook engagement between the release hole 4111 and the buckle block 1141. The second return spring 44 is used to keep the limiting post 432 in the limiting slot 1213. The second return spring 44 can be inserted into the slide 43 and the buckle plate 41 respectively to prevent the second return spring 44 from shifting. When separating the box base 11 from the box lid 12, the user first moves the slide block 43 so that the limiting post 432 of the slide block 43 disengages from the limiting slot 1213. Then, pressure is applied to the slide block 43 to apply pressure to the control section 413 of the buckle plate 41 so that the buckle plate 41 rotates, thereby causing the buckle hole 4111 of the buckle plate 41 to disengage from the locking block 1141 of the box base 11. At this time, the user can pull the peripheral wall 121 of the box lid out of the peripheral wall 114 of the box base so that the box base 11 is separated from the box lid 12. This separation method of the box base 11 and the box lid 12 can prevent accidental operation and avoid accidental separation between the box base 11 and the box lid 12.

[0059] In an embodiment of this utility model, a spare fuse 5 is detachably fitted to the side of the box cover 12 facing the box base 11; thus, when the fuse 2 is damaged, the spare fuse 5 can be used directly to replace the fuse 2.

[0060] In this embodiment of the present invention, the side of the box cover 12 facing the box base 11 is detachably fitted with a mounting partition 6 via a snap-fit ​​connection. A spare fuse 5 is sandwiched between the box cover 12 and the mounting partition 6, thus detachably fitting the spare fuse 5 to the box cover 12. The spare fuse 5 is inserted into the box cover 12 to prevent it from shifting out of the box cover 12 and the mounting partition 6. The mounting partition 6 has claws 61 at both ends. A locking point 124 is provided between the box cover 12 and the mounting partition 6 for the claws 61 at both ends of the mounting partition 6 to engage. A bent portion 62 is formed in the middle of the mounting partition 6, giving it elastic deformation capability. Unlocking tabs 63 are provided at both ends of the bent portion 62. The user can apply force to the unlocking tabs 63 at both ends of the bent portion 62 to deform the mounting partition 6, causing the claws 61 at both ends of the mounting partition 6 to disengage from the locking point 124, thereby removing the mounting partition 6 and subsequently the spare fuse 5.

[0061] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. An external fuse box, comprising a box body and a fuse; the box body includes a detachably connected base and a cover, and a sealing ring sandwiched between the base and the cover, the base being fitted with two conductive connectors; the fuse is housed within the box body and electrically connected to the two conductive connectors; characterized in that: The box base has a sealing part on the side away from the box cover and multiple fixing parts located inside the sealing part. The sealing part is fitted with a sealing gasket, and the fixing parts are fitted with fixing nuts.

2. The external fuse block of claim 1, wherein: The housing has two locking parts inside. The contact parts of the two conductive connectors are respectively fitted onto the two locking parts. The two ends of the fuse are respectively in contact with the contact parts of the two conductive connectors, and the two ends of the fuse are respectively locked onto the two locking parts by locking bolts. The locking bolts pass through the end of the fuse and the contact part of the conductive connector and are screwed into the locking parts.

3. The external fuse block of claim 1, wherein: The sealing part of the box base forms a groove, and the sealing gasket is fitted into the groove.

4. The external fuse block of claim 1, wherein: The box base forms an annular box base peripheral wall, and the box cover has an annular box cover peripheral wall. The box cover peripheral wall is inserted into the box base peripheral wall, and the sealing ring is sandwiched between the box cover peripheral wall and the box base peripheral wall.

5. The external fuse block of claim 4, wherein: The outer side of the box base is provided with a locking block; the box cover is equipped with a locking assembly that can be used to hook the locking block.

6. The external fuse block of claim 5, wherein: The box cover has a raised component connection part on its peripheral wall; The buckle assembly includes a buckle plate and a first return spring. The buckle plate is provided with a buckling section, a pivot section and a control section in sequence. The buckling section of the buckle plate is provided with a buckle hole that cooperates with the movable hook of the buckle block. The pivot section of the buckle plate is pivotally connected to the component connection part. The first return spring is sandwiched between the control section of the buckle plate and the peripheral wall of the box cover.

7. The external fuse box as described in claim 6, characterized in that: The component connection part of the peripheral wall of the box cover is provided with a limiting bayonet; The buckle assembly also includes a slide block and a second return spring. The slide block is slidably connected to the control section of the buckle plate, and the second return spring is disposed between the slide block and the control section. The slide block is provided with a limiting post that engages with the limiting slot.

8. The external fuse block of claim 4, wherein: The inner sides of the box cover's perimeter wall are provided with non-corresponding reinforcing plates.

9. The external fuse box as described in claim 1, characterized in that: The side of the box cover facing the box base is detachably fitted with a spare fuse.

10. The external fuse block of claim 1, wherein: The box cover is detachably fitted with a mounting partition on the side facing the box base via a snap-fit ​​connection. A spare fuse is clipped between the box cover and the mounting partition, and the spare fuse is inserted into the box cover.

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