Protective cover and fusing system

Abstract

The utility model provides a protective cover and a fusing system, the protective cover comprises a protective cover body and a mounting portion, the protective cover body comprises a bottom plate and side plates, the bottom plate is configured to be fixed in an energy storage system, the side plates are arranged around the periphery of the bottom plate, and the side plates and the bottom plate form a protective space; at least part of the installation part is located in the protection space and fixed to the protective cover body, and the installation part is configured to install a fuse; in the technical scheme of the application, the fuse is protected by arranging the protective cover, the fuse is prevented from being mechanically impacted in the energy storage system, and compared with a mounting form of protecting the fuse by separately arranging the fuse protective cover, the insulating column and the metal plate in the related technology, the mounting efficiency is greatly improved. According to the protective cover, only the fuse needs to be installed on the installation part, the positioning precision is high, and the installation working hours can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of protective covers, in particular to a protective cover and a fuse system. Background Art

[0002] In the related art, fuses are a very important electrical component and are used in many locations in energy storage systems. As key components in energy storage systems, in order to prevent mechanical shocks in the energy storage system from causing loose connections between the two ends of the fuse and the copper busbar, thereby causing abnormal melting or fire, fuse protective covers are usually designed to provide peripheral protection for the fuses. A sheet metal piece is designed under the fuse protective cover to support the fuse to keep it stable, and the copper busbar and the fuse are fixed with insulating columns. The whole process involves many installation parts, with very strict requirements on dimensional accuracy, high costs, and a long installation time. Utility Model Content

[0003] The embodiments of the utility model provide a protective cover and a fuse system, which can improve the technical problems in the related art that when installing the protective cover on the periphery of the fuse, a plurality of parts need to be assembled, resulting in poor positioning accuracy and long installation time.

[0004] In a first aspect, an embodiment of the utility model provides a protective cover, comprising:

[0005] A protective cover body, the protective cover body comprising a bottom plate and side plates, the bottom plate being configured to be fixed in the energy storage system, the side plates being arranged around the bottom plate, and the side plates and the bottom plate enclose forming a protective space; and

[0006] The mounting portion, at least a portion of which is located in the protection space and fixed to the protective cover body, is configured to mount a fuse.

[0007] In one embodiment, the mounting portion is fixed to the base plate;

[0008] The dimension of the bottom plate in the first direction is D, and the first direction is the thickness direction of the bottom plate; wherein D satisfies: 4mm≤D≤6mm.

[0009] In one embodiment, the dimension of the side plate in the first direction is greater than the dimension of the mounting portion in the first direction;

[0010] The first direction is the thickness direction of the bottom plate.

[0011] In one embodiment, a vertical distance between an end of the mounting portion in the first direction away from the bottom plate and an end of the side plate in the first direction away from the bottom plate is L; wherein L satisfies: 18 mm ≤ L ≤ 30 mm.

[0012] In one embodiment, the mounting portion includes at least two sub-mounting portions. The sub-mounting portions are fixed on the bottom plate. One end of each sub-mounting portion facing away from the bottom plate is provided with a threaded hole along a first direction, and the sub-mounting portion is used to fixedly connect and install a fuse through the threaded hole. The first direction is the thickness direction of the bottom plate;

[0013] The size of the threaded hole in the first direction is L1, and the size of the sub-mounting portion in the first direction is L2; wherein, L1 satisfies: 10 mm < L1 ≤ L2.

[0014] In one embodiment, the sub-mounting portion and the bottom plate are integrally formed.

[0015] In one embodiment, the protective cover further includes at least one support portion, and the support portion is arranged on the periphery of the sub-mounting portion and fixed to the bottom plate.

[0016] In one embodiment, at least one through hole is further provided on the bottom plate, and the through hole penetrates the bottom plate in the first direction.

[0017] In a second aspect, an embodiment of the present invention provides a fusing system, including:

[0018] A protective cover; and

[0019] A fuse, installed on the mounting portion in the protective cover.

[0020] In one embodiment, at least a part of the fuse is arranged in the protection space.

[0021] The beneficial effects of the embodiments of the present invention:

[0022] In the technical solution of the present application, by arranging the protective cover body to be installed in the energy storage system and then installing the fuse on the mounting portion, the protective cover can protect the fuse and prevent the fuse from being mechanically impacted in the energy storage system; wherein, the bottom plate, the side plate and the mounting portion are all fixed together, thereby improving the installation stability of the fuse in the protective cover. Compared with the installation form in the related art where the fuse protective cover, the insulating column and the sheet metal are separately arranged to protect the fuse, the protective cover in the embodiment of the present application only needs to install the fuse on the mounting portion, with high positioning accuracy and effectively reducing the installation man-hours. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 It is a three-dimensional schematic diagram of the protective cover provided by the embodiment of the present invention;

[0025] Figure 2 It is a three-dimensional schematic diagram of another perspective of the protective cover provided by the embodiment of the present utility model;

[0026] Figure 3 It is a cross-sectional schematic diagram of the protective cover provided by the embodiment of the present utility model;

[0027] Figure 4 It is a structural schematic diagram of the protective cover provided by the embodiment of the present utility model.

[0028] Reference numerals:

[0029] 1. Protective cover body; 11. Bottom plate; 12. Side plate; 2. Protection space; 31. Installation part; 311. Sub-installation part; 32. Support part; 4. Screw hole; 5. Through hole. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation words such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0031] The present utility model proposes a protective cover, Figures 1 to 4 For some embodiments of the present utility model. Please refer to Figures 1 to 4 , the Z direction is the first direction, the X direction is the second direction, and the Y direction is the third direction; the first direction Z, the second direction X, and the third direction Y intersect pairwise, and the included angle between any two of the first direction Z, the second direction X, and the third direction Y is not limited, and can be 80°, 85°, 90°, 95°, 100°; in the following embodiments, the included angle between any two of the first direction Z, the second direction X, and the third direction Y is 90° for illustration, that is, a three-dimensional rectangular coordinate system is established by the first direction Z, the second direction X, and the third direction Y to explain some embodiments of the present application; it should be emphasized that the included angle between any two of the first direction Z, the second direction X, and the third direction Y being 90° does not constitute a limitation on the following embodiments of the present application.

[0032] Please refer toFigures 1 to 2 The protective cover includes a protective cover body 1. The protective cover body 1 includes a bottom plate 11 and side plates 12. The bottom plate 11 is configured to be fixed in the energy storage system, and the side plates 12 surround the periphery of the bottom plate 11. The side plates 12 and the bottom plate 11 enclose a protection space 2. Among them, the protective cover body 1 is arranged in the energy storage system, and the fuse is arranged in the protection space 2 formed by the protective cover body 1, so as to protect the fuse located in the energy storage system.

[0033] The energy storage system can be a battery module or a battery pack. Any energy storage system with a fuse can apply the protective cover described in the embodiments of the present application.

[0034] In an embodiment of the present application, the energy storage system is a battery pack. Among them, the fuse plays a role in protecting the circuit in the battery pack. When the battery pack is in a normal state, the fuse acts as a part of the circuit and plays a role in connecting the circuits in the battery pack. At the same time, when the battery pack is in a large current and short - circuit situation during charging or discharging, the fuse can disconnect the circuit in the battery pack, thereby preventing the battery pack from being damaged.

[0035] The protective cover further includes a mounting portion 31. At least part of the mounting portion 31 is located in the protection space 2 and is fixed to the protective cover body 1. The mounting portion 31 is configured to mount the fuse. Among them, in one embodiment, the mounting portion 31 can be fixed to the bottom plate 11; in another embodiment, the mounting portion 31 can be fixed to the side plate 12; in still another embodiment, the mounting portion 31 can be fixed to both the bottom plate 11 and the side plate 12 at the same time. The mounting portion 31 fixes the fuse in the protection space 2 so that at least part of the fuse is located in the protection space 2 to prevent the fuse from falling out of the protection space 2.

[0036] In the technical solution of the present application, by arranging the protective cover body 1 to be installed in the energy storage system and then mounting the fuse on the mounting portion 31, the protective cover can protect the fuse and prevent the fuse from being mechanically impacted in the energy storage system. Among them, the bottom plate 11, the side plates 12 and the mounting portion 31 are all fixed together, so as to improve the installation stability of the fuse in the protective cover. Compared with the installation form in the related art where the fuse protective cover, the insulating column and the sheet metal are separately arranged to protect the fuse, in the protective cover of the embodiments of the present application, only by mounting the fuse on the mounting portion 31, the positioning accuracy is high and the installation man - hours can be effectively reduced.

[0037] It can be understood that, in an embodiment of the present application, the mounting portion 31 can be completely located in the protection space 2; in another embodiment, at least part of the mounting portion 31 can be located in the protection space 2. In the present application, no limitation is made on this, as long as at least part of the fuse mounted on the mounting portion 31 is located in the protection space 2.

[0038] In addition, since the fuse is heavy, a sheet metal sheet is provided under the fuse shield in the related art for support, so that the fuse remains stable after installation; see Figure 3 In some embodiments of the present application, the mounting portion 31 is fixed to the bottom plate 11; the dimension of the bottom plate 11 in the first direction Z is defined as D; wherein D satisfies: 4mm≤D≤6mm. That is, in this embodiment, D is set to satisfy the interval range of 4mm≤D≤6mm, so that the support strength of the bottom plate 11 can meet the installation requirements of the fuse, and the fuse can be ensured to remain stable after installation; if D is less than 4mm, the support strength of the bottom plate 11 is difficult to meet the installation requirements of the fuse, and the fuse is prone to unstable installation after installation; if D is greater than 6mm, the material cost of the protective cover increases.

[0039] It should be additionally explained that the first direction Z is the thickness direction of the bottom plate 11 .

[0040] The value of D can be 4mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, 5mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm, 5.6mm, 5.7mm, 5.8mm, 5.9mm, 6mm. The value of D is not limited to the listed values, and other values ​​not listed in the numerical range are also applicable.

[0041] In some embodiments of the present application, the size of the side plate 12 in the first direction Z is larger than the size of the mounting portion 31 in the first direction Z; that is, it is configured so that the plurality of side plates 12 can protect the peripheral side of the fuse mounted on the mounting portion 31, thereby preventing the fuse from being subjected to mechanical shock in the energy storage system, causing the connection between the two ends of the fuse and the copper busbar to loosen, thereby causing abnormal melting or fire.

[0042] In some embodiments of the present application, a vertical distance between one end of the mounting portion 31 facing away from the bottom plate 11 in the first direction Z and one end of the side plate 12 facing away from the bottom plate 11 in the first direction Z is defined as L; wherein L satisfies: 18mm≤L≤30mm; that is, in this embodiment, setting L to satisfy the interval of 18mm≤L≤30mm can enable the multiple side plates 12 to protect the fuse and prevent the fuse from being subjected to mechanical impact in the battery pack. If L is less than 18mm, the multiple side plates 12 cannot completely cover the surrounding sides of the fuse, that is, at least part of the fuse will protrude from the multiple side plates 12 in the first direction Z, thereby making the fuse easily subjected to mechanical impact in the battery pack; if L is greater than 30mm, the size of the side plate 12 in the first direction Z is too long, thereby making the protective cover occupy too much space in the fuse, and the protective cover is easy to interfere with other components in the battery pack.

[0043] Among them, the value of L can be 18 mm, 18.5 mm, 19 mm, 19.5 mm, 20 mm, 20.5 mm, 21 mm, 21.5 mm, 22 mm, 22.5 mm, 23 mm, 23.5 mm, 24 mm, 24.5 mm, 25 mm, 25.5 mm, 26 mm, 26.5 mm, 27 mm, 27.5 mm, 28 mm, 28.5 mm, 29 mm, 29.5 mm, 30 mm. The value of L is not limited to the listed values, and other unlisted values within this numerical range are equally applicable.

[0044] In some embodiments of the present application, the installation part 31 includes at least two sub-installation parts 311. The sub-installation parts 311 are fixed on the bottom plate 11. One end of each sub-installation part 311 facing away from the bottom plate 11 is provided with a screw hole 4 in the first direction Z. The fuse is fixed by screwing through the screw hole 4, and the fuse and the copper bar can be fixed on the sub-installation part 311 simultaneously by screwing the bolt into the screw hole 4.

[0045] Among them, the size of the screw hole 4 in the first direction Z is defined as L1, and the size of the sub-installation part 311 in the first direction Z is defined as L2; among them, L1 satisfies: 10 mm < L1 ≤ L2; in this embodiment, setting the interval range where L1 satisfies 10 mm < L1 ≤ L2 can avoid the phenomenon of the bolt becoming loose when screwed into the screw hole 4, that is, it can ensure that the three of the fuse, the copper bar, and the sub-installation part 311 are firmly fixed; if L1 is less than or equal to 10 mm, there may be a risk that the bolt becomes loose when screwed into the screw hole 4, that is, it is not easy to firmly fix the three of the fuse, the copper bar, and the sub-installation part 311; and due to the size limitation of the sub-installation part 311 in the first direction Z, and the screw hole 4 is located on the sub-installation part 311, the value of L1 will not be greater than L2.

[0046] In some embodiments of the present application, the sub-installation parts 311 are arranged at intervals in the second direction X and correspond to both ends of the fuse respectively.

[0047] In some embodiments of the present application, both of the two sub-installation parts 311 are made of insulating materials.

[0048] In some embodiments of the present application, the sub-installation part 311 is fixed on the bottom plate 11 and integrally formed with the bottom plate 11; among them, the protective cover is integrally formed by injection molding.

[0049] It should be noted that, compared with the implementation manner of installing two insulating columns on a sheet metal in the related art, the two sub-installation parts 311 and the protective cover body 1 are integrally formed, which not only has high positioning accuracy, but also can avoid the contact stress between the fuse, the copper row and the bolt caused by the inconsistent flatness after installing the two insulating columns on the sheet metal in the related art, thereby causing the temperature rise of the fuse to be too large during use and resulting in abnormal disconnection.

[0050] In some embodiments of the present application, the protective cover further includes at least one support part 32, and the support part 32 is arranged on the periphery of the sub-installation part 311 and fixed to the bottom plate 11; wherein, the structural design of the support part 32 can enhance the connection strength between the sub-installation part 311 and the bottom plate 11.

[0051] In some embodiments of the present application, to ensure the hardness and heat resistance of the protective cover, the material of the protective cover is polyhexamethylene adipamide and glass fiber. Among them, the usage ratio of polyhexamethylene adipamide and glass fiber is not limited. In one implementation, the protective cover is made of 50% polyhexamethylene adipamide, 20% glass fiber and 30% flame retardant; in another embodiment, the protective cover is made of 60% polyhexamethylene adipamide, 10% glass fiber and 30% flame retardant.

[0052] Please refer to Figure 4 , in some embodiments of the present application, at least one through hole 5 is further opened on the bottom plate 11, and the through hole 5 penetrates the bottom plate 11 in the first direction Z; wherein, the bottom plate 11 is installed in the energy storage system through the through hole 5, that is, a screw can pass through the through hole 5 to fix the protective cover body 1 in the energy storage system.

[0053] In one embodiment of the present application, the number of the through holes 5 is four, and the four through holes 5 are all located between the two sub-installation parts 311 and are arranged in an array in the plane where the second direction X and the third direction Y are located.

[0054] In some embodiments of the present application, the protective cover body 1 is rectangularly arranged, and the protective cover body 1 includes four side plates 12 connected end to end in sequence. A part of one side plate 12 in the third direction Y protrudes in a direction away from the protection space 2, so that the protection space 2 can be adapted to the shape of the fuse.

[0055] The present application also proposes a fusing system, which includes a protective cover and a fuse. The protective cover includes a protective cover body 1, and the protective cover body 1 includes a bottom plate 11 and side plates 12. The bottom plate 11 is configured to be fixed in the battery box, and the side plates 12 surround the periphery of the bottom plate 11. The side plates 12 and the bottom plate 11 enclose a protection space 2; wherein, the protective cover body 1 is arranged in the energy storage system, and the fuse is arranged in the protection space 2 formed by the protective cover body 1, so as to protect the fuse located in the energy storage system.

[0056] Among them, the fusing system is arranged in the energy storage system. The energy storage system can be a battery module or a battery pack. Any energy storage system with a fuse can apply the fusing system described in the embodiments of the present application.

[0057] In an embodiment of the present application, the energy storage system is a battery pack. Among them, the fuse plays a role in protecting the circuit in the battery pack. When the battery pack is in a normal state, the fuse acts as a part of the circuit and plays a role in connecting the circuit in the battery pack. At the same time, when the battery pack is in a large current and short - circuit situation during charging or discharging, the fuse can disconnect the circuit in the battery pack, thereby preventing the battery pack from being damaged.

[0058] The protective cover further includes an installation part 31. At least part of the installation part 31 is located in the protection space 2 and is fixed to the protective cover body 1. The installation part 31 is configured to install the fuse. Among them, in one embodiment, the installation part 31 can be fixed to the bottom plate 11; in another embodiment, the installation part 31 can be fixed to the side plate 12; in still another embodiment, the installation part 31 can be fixed to both the bottom plate 11 and the side plate 12 at the same time. The installation part 31 fixes the fuse in the protection space 2 to prevent the fuse from coming out of the protection space 2.

[0059] In some embodiments of the present application, at least part of the fuse is arranged in the protection space. That is, in an embodiment of the present application, when the fuse is installed on the installation part 31, at least part of the fuse can still be exposed outside the protection space 2; in another embodiment of the present application, when the fuse is installed on the installation part 31, the fuse can be completely located in the protection space 2.

[0060] Among them, by installing the protective cover body 1 in the energy storage system and then installing the fuse on the installation part 31 located in the protection space 2, the protective cover can protect the fuse and prevent the fuse from being mechanically impacted in the energy storage system. Among them, the bottom plate 11, the side plate 12 and the installation part 31 are all fixed together, so as to improve the installation stability of the fuse in the protective cover. Compared with the installation form in the related art where the fuse protective cover, the insulating column and the sheet metal are separately arranged to protect the fuse, in the protective cover of the embodiments of the present application, only by installing the fuse on the installation part 31, the positioning accuracy is high and the installation man - hours can be effectively reduced.

[0061] In addition, since the weight of the fuse is relatively large, in the related art, a sheet metal is arranged under the fuse protective cover for support, so that the fuse remains stable after installation. Please refer to Figure 3In some embodiments of the present application, the mounting portion 31 is fixed to the bottom plate 11; the dimension of the bottom plate 11 in the first direction Z is defined as D; wherein D satisfies: 4mm≤D≤6mm. That is, in this embodiment, D is set to satisfy the interval range of 4mm≤D≤6mm, so that the support strength of the bottom plate 11 can meet the installation requirements of the fuse, and the fuse can be ensured to remain stable after installation; if D is less than 4mm, the support strength of the bottom plate 11 is difficult to meet the installation requirements of the fuse, and the fuse is prone to unstable installation after installation; if D is greater than 6mm, the material cost of the protective cover increases.

[0062] In some embodiments of the present application, the size of the side plate 12 in the first direction Z is larger than the size of the mounting portion 31 in the first direction Z; that is, it is configured so that the plurality of side plates 12 can protect the peripheral side of the fuse mounted on the mounting portion 31, thereby preventing the fuse from being subjected to mechanical shock in the energy storage system, causing the connection between the two ends of the fuse and the copper busbar to loosen, thereby causing abnormal melting or fire.

[0063] In some embodiments of the present application, a vertical distance between one end of the mounting portion 31 facing away from the bottom plate 11 in the first direction Z and one end of the side plate 12 facing away from the bottom plate 11 in the first direction Z is defined as L; wherein L satisfies: 18mm≤L≤30mm; that is, in this embodiment, setting L to satisfy the interval of 18mm≤L≤30mm can enable the multiple side plates 12 to protect the fuse and prevent the fuse from being subjected to mechanical impact in the battery pack. If L is less than 18mm, the multiple side plates 12 cannot completely cover the surrounding sides of the fuse, that is, at least part of the fuse will protrude from the multiple side plates 12 in the first direction Z, thereby making the fuse easily subjected to mechanical impact in the battery pack; if L is greater than 30mm, the size of the side plate 12 in the first direction Z is too long, thereby making the protective cover occupy too much space in the fuse, and the protective cover is easy to interfere with other components in the battery pack.

[0064] The embodiments of the present invention are described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A protective cover, characterized in that: include: A protective cover body, the protective cover body comprising a bottom plate and side plates, the bottom plate being configured to be fixed in the energy storage system, the side plates being arranged around the bottom plate, and the side plates and the bottom plate enclosing each other to form a protective space; and The mounting portion, at least a portion of which is located in the protection space and fixed to the protective cover body, is configured to mount a fuse.

2. The protective cover according to claim 1, characterized in that: The mounting portion is fixed to the base plate; The dimension of the bottom plate in a first direction is D, and the first direction is the thickness direction of the bottom plate; wherein D satisfies: 4mm≤D≤6mm.

3. The protective cover according to claim 1, characterized in that: The dimension of the side plate in the first direction is greater than the dimension of the mounting portion in the first direction; The first direction is a thickness direction of the bottom plate.

4. The protective cover according to claim 3, characterized in that: A vertical distance between one end of the mounting portion in the first direction away from the bottom plate and one end of the side plate in the first direction away from the bottom plate is L; wherein L satisfies: 18 mm ≤ L ≤ 30 mm.

5. The protective cover according to claim 1, characterized in that: The mounting portion includes at least two sub-mounting portions, the sub-mounting portions are fixed to the bottom plate, and a screw hole is provided at one end of each sub-mounting portion away from the bottom plate along a first direction, and the sub-mounting portion is used to screw the fuse through the screw hole, and the first direction is the thickness direction of the bottom plate; The dimension of the screw hole in the first direction is L1, and the dimension of the sub-mounting portion in the first direction is L2; ​​wherein L1 satisfies: 10 mm<L1≤L2.

6. The protective cover according to claim 5, characterized in that: The sub-mounting portion is integrally formed with the bottom plate.

7. The protective cover according to claim 6, characterized in that: The protective cover further includes at least one supporting portion, which is disposed on the peripheral side of the sub-mounting portion and fixed to the bottom plate.

8. The protective cover according to claim 5, characterized in that: The bottom plate is also provided with at least one via hole, and the via hole penetrates the bottom plate in a first direction.

9. A fusing system, characterized in that: include: A protective cover as claimed in any one of claims 1 to 8; and A fuse is mounted on the mounting portion in the protective cover.

10. The fuse system according to claim 9, characterized in that: At least a portion of the fuse is disposed in the protection space.

Images