Shunt protection box and battery pack

Abstract

The utility model provides a shunt protection box and a battery pack. The shunt protection box comprises a box body with an accommodating cavity, a copper bar protection part arranged on the box body and a limiting part arranged in the box body, the accommodating cavity is used for accommodating the shunt main body, and a copper bar is arranged on the shunt main body; the copper bar protection part comprises a protection groove communicated with the containing cavity, one end of the copper bar is located in the protection groove and connected with the shunt body, and the other end of the copper bar extends out of the containing cavity; the limiting part can abut against the diverter body so that the limiting part can limit the diverter body when the diverter body moves in the height direction of the box body. According to the shunt protection box provided by the embodiment of the invention, the risk of high-voltage touch caused by exposure of the copper bar can be avoided, the electrical connection with peripheral conductors can be effectively isolated, the requirements of electrical clearance and creepage distance can be reduced, and meanwhile, the jumping of the shunt main body can be limited, so that the protection effect on the shunt can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to a shunt protection box. The utility model also relates to a battery pack provided with the shunt protection box. Background Art

[0002] In the battery pack structure, the layout of the shunt is mostly placed outside the BDU and connected in series in the high-voltage circuit between the BDU and the module. This structural layout has the following disadvantages: First, the copper busbar on the shunt is an exposed high-voltage device, which is prone to safety hazards during production and after-sales unpacking and maintenance. There is a risk of high-voltage contact, and it does not meet the requirements of high-voltage IPXXB. Second, the copper busbar on the shunt is exposed in the battery pack. If it is used in a battery pack with a higher system voltage platform, such as an 800V platform, it has higher requirements for the electrical clearance and creepage distance with the surrounding conductors. Therefore, it puts forward higher requirements for the surrounding space, which will affect the layout of the entire package envelope and the power in the package. Third, the support of the shunt in the Z direction is completely dependent on the copper busbars and fastening bolts at both ends, so there will be stress concentration, which will cause the torque attenuation of the bolts over a long period of time. Utility Model Content

[0003] In view of this, the utility model aims to provide a diverter protection box to improve the protection effect of the diverter.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A diverter protection box comprises a box body with a receiving cavity, a copper bar protection part arranged on the box body and a limiting part arranged in the box body;

[0006] The receiving cavity is used to receive the diverter body, and the diverter body is provided with a copper busbar;

[0007] The copper bar protection part comprises a protection groove connected to the receiving cavity, one end of the copper bar is located in the protection groove and connected to the diverter body, and the other end extends to the outside of the receiving cavity;

[0008] The limiting portion can abut against the diverter body, so that when the diverter body is displaced along the height direction of the box body, the limiting portion can limit the diverter body.

[0009] Furthermore, a connecting portion is provided on the box body, and the copper busbar and the diverter body are connected to the box body via a connecting piece connected to the connecting portion.

[0010] Further, the connecting portion includes a connecting hole provided on the box body, and the connecting member is screwed into the connecting hole; or, the connecting portion includes an insert nut embedded in the box body, and the connecting member is screwed connected to the insert nut; or, the connecting portion includes a stud provided on the box body, and the connecting member includes a nut screwed connected to the stud.

[0011] Furthermore, the limiting portion includes a limiting rib provided on the inner wall of the box body, and a gap L between the limiting rib and two opposite end surfaces of the diverter body is between 0.3 mm and 0.5 mm.

[0012] Furthermore, the box body is provided with a mounting portion connected to an external component; and / or the box body is provided with an anti-mistake mounting portion.

[0013] Furthermore, the mounting portion includes a mounting ear provided on the box body, and a mounting hole provided on the mounting ear, and the box body is connected to the external component via a connecting piece passing through the mounting hole; and / or, the anti-error mounting portion includes an anti-error mounting hole provided on the box body.

[0014] Furthermore, the box body includes a lower box body and an upper cover that are snap-fitted together, and the accommodating cavity is formed between the lower box body and the upper cover; the diverter body is connected to the lower box body, and the limiting portion is arranged on the upper cover.

[0015] Furthermore, the lower box body and the upper cover are connected by snap-fitting.

[0016] Furthermore, the lower box body is provided with a clamping protrusion, and the upper cover is provided with a clamping arm with a clamping hole; the clamping protrusion can be clamped in the clamping hole, and the clamping arm can be operated in the direction pointing to the box body to release the clamping protrusion from the clamping hole.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The shunt protection box described in the utility model can accommodate the shunt body in the box body, and the copper busbar connected to the shunt body can be partially located in the protection groove, so as to protect the copper busbar and avoid the risk of high voltage contact due to the exposure of the copper busbar. At the same time, the copper busbar is protected in the box body, which can effectively isolate the electrical connection with the surrounding conductors and reduce the requirements for electrical clearance and creepage distance. And the limit part arranged in the box body can abut against the shunt body, which can limit the jumping of the shunt in the height direction of the box body, and can reduce the risk of damage to the shunt body during transportation, thereby improving the protection effect of the shunt.

[0019] In addition, the connection part provided on the box body connects the copper busbar and the main body of the shunt to the box body, which can improve the fixing effect of the shunt. The connection part adopts the structure of the connection hole, so that the connection piece is screwed in the connection hole, which has the characteristics of simple structure and easy processing and manufacturing. The connection part adopts the insert nut, so that the connection piece is screwed to the insert nut, which also has the characteristics of simple structure and easy processing and manufacturing, and can also help to ensure the reliability of the connection. The connection column adopts a stud, and the connection piece adopts a nut, so that the connection piece and the connection part can also be screwed together.

[0020] Secondly, the limiting part adopts limiting ribs, which has the characteristics of simple structure and easy design and implementation. The setting of the installation part is conducive to the installation of the box body on the external component. The setting of the error-proof installation part can effectively prevent the problem of subsequent copper busbars being unable to be installed due to incorrect assembly of the box body.

[0021] In addition, the box body adopts a structure of a lower box body and an upper cover that are connected by snapping, and the diverter body is connected to the lower box body, which can facilitate the installation of the diverter body while also providing better support for the diverter body and reducing the occurrence of stress. The lower box body and the upper cover are connected by snapping, which can facilitate the disassembly and assembly of the lower box body and the upper cover. The snapping protrusion and the snapping hole on the snapping arm are snapped together, and the structure is simple and easy to operate. When operating the snapping arm, it is pressed in the direction of the box body, and the surrounding installation and disassembly space requirements are small, and it is easy to disassemble.

[0022] Another object of the present invention is to provide a battery pack, wherein the above-mentioned shunt protection box is provided in the battery pack.

[0023] The battery pack of the present invention and the shunt protection box as described above have the same beneficial effects as the prior art, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0025] Figure 1 It is a structural schematic diagram of the diverter protection box according to an embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the lower box body according to an embodiment of the utility model;

[0027] Figure 3 A schematic structural diagram of the upper cover according to an embodiment of the utility model from a first viewing angle;

[0028] Figure 4A schematic structural diagram of the upper cover according to an embodiment of the utility model from a second viewing angle;

[0029] Figure 5 It is a structural schematic diagram of the diverter protection box in the application state according to the embodiment of the utility model;

[0030] Figure 6 A cross-sectional view of the diverter protection box in the application state according to the embodiment of the utility model;

[0031] Figure 7 This is a structural schematic diagram of the main body of the diverter according to an embodiment of the utility model;

[0032] Description of reference numerals:

[0033] 1. Box body; 11. Lower box body; 12. Upper cover; 100. Protective groove; 101. Mounting ear; 102. Mounting portion; 103. Error-proof mounting portion; 111. Snap-fit ​​protrusion; 112. Connecting portion; 122. Snap-fit ​​arm; 1221. Snap-fit ​​hole;

[0034] 2. shunt; 21. shunt body; 22. copper busbar; 221. insulating layer; 200. through hole;

[0035] 10. Copper busbar protection part; 20. Limiting part. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0037] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0040] Embodiment 1

[0041] The present embodiment relates to a diverter protection box, which can improve the protection effect of the diverter.

[0042] In terms of overall composition, Figure 1 As shown, the diverter protection box of this embodiment includes a box body 1 having a receiving cavity, a copper busbar protection portion 10 arranged on the box body 1, and a limiting portion 20 arranged in the box body 1. The receiving cavity is used to receive a diverter body 21, and a copper busbar 22 is arranged on the diverter body 21. The copper busbar protection portion 10 includes a protection groove 100 connected to the receiving cavity, one end of the copper busbar 22 is located in the protection groove 100 and is connected to the diverter body 21, and the other end extends to the outside of the receiving cavity. The limiting portion 20 can abut against the diverter body 21, so that when the diverter body 21 is displaced along the height direction of the box body 1, the limiting portion 20 can limit the diverter body 21.

[0043] In the above structure, by providing the box body 1, the copper busbar protection portion 10 and the limiting portion 20, the shunt body 21 can be accommodated in the box body 1, and the copper busbar 22 connected to the shunt body 21 can be partially located in the protection groove 100, so that the copper busbar 22 can be protected and the risk of high voltage contact due to the copper busbar 22 being exposed can be avoided. At the same time, the copper busbar 22 is protected in the box body 1, which can effectively isolate the electrical connection with the surrounding conductors and reduce the requirements for electrical clearance and creepage distance. In addition, the limiting portion 20 provided in the box body 1 can abut against the shunt body 21, which can limit the jump of the shunt in the height direction of the box body 1, and can reduce the risk of damage to the shunt body 21 during transportation, thereby improving the protection effect of the shunt.

[0044] In detail, combined with Figure 1 , Figure 5 and Figure 7 As shown, the structure of the current divider of this embodiment is as follows Figure 7 As shown, the shunt includes a shunt body 21 and two copper bars 22 connected to both ends of the shunt body 21. The shunt body 21 and the copper bars 22 are both provided with through holes 200 penetrating the two, and the shunt body 21 and the copper bars 22 are connected together by a connector. In addition, an insulating layer is also provided on the copper bars, so that the portion of the copper bars extending outside the receiving cavity can be protected by the insulating layer, thereby avoiding the risk of high voltage contact.

[0045] In this embodiment, the diverter body 21 is accommodated in the receiving cavity, and one end of the two copper bars 22 connected to the diverter body 21 is respectively located in the protective groove 100, and the other end extends to the outside of the receiving cavity. In addition, the two copper bars 22 and the diverter body 21 are installed on the mounting portion 102 of the box body 1 through a connector penetrating through the through hole 200.

[0046] See also Figures 1 to 4 As shown, in this embodiment, a connection portion 112 is provided on the box body 1, and the copper busbar 22 and the diverter body 21 are connected to the box body 1 through a connector connected to the connection portion 112. The setting of the connection portion 112 can connect the copper busbar 22 and the diverter body 21 to the box body 1, thereby improving the fixing effect of the diverter.

[0047] Specifically, as a preferred embodiment, the connection portion 112 includes a connection hole provided on the box body 1, and the connection piece is screwed in the connection hole. Through the connection between the connection piece and the connection hole, the copper bus 22 and the diverter body 21 are connected to the box body 1. The connection piece can be, for example, a bolt or a stud, and the connection hole can be a through hole or a threaded hole. When a through hole is used, a nut needs to be provided to screw with the bolt or stud. When a threaded hole is used, it is only necessary to screw the bolt or stud in the threaded hole.

[0048] As another preferred embodiment, Figure 2 As shown in the figure, the connecting part 112 includes an insert nut embedded in the box body 1, and the connecting piece is threadedly connected to the insert nut. The connecting piece can also be a bolt or a stud. In this way, the copper bus 22 and the diverter body 21 can be connected to the box body 1. The threaded connection between the connecting piece and the insert nut not only has a simple structure and is easy to process and manufacture, but also helps to ensure the reliability of the connection.

[0049] As another preferred embodiment, the connection part 112 is provided on a stud on the box body 1, and the connection member includes a nut screwed to the stud. In this case, the stud is inserted into the through hole 200 on the shunt body 21 and the copper bar 22, and the copper bar 22 and the shunt body 21 are screwed to the box body 1, which is also feasible.

[0050] See also Figure 4 and Figure 6 As shown, the limiting portion 20 of this embodiment includes a limiting rib provided on the inner wall of the box body 1, and the gap L between the limiting rib and the two opposite end surfaces of the diverter body 21 is between 0.3mm and 0.5mm. Figure 6As shown, the limiting ribs include intersecting transverse limiting ribs and longitudinal limiting ribs, and the gap L between the limiting ribs and the two opposite end faces of the diverter body 21 can be set to 0.3mm, 0.4mm or 0.5mm, for example. The setting of the gap L can ensure the smooth installation of the diverter body 21, while having a small displacement, and the gap can effectively suppress the jumping of the diverter body 21 along the height direction of the box body 1.

[0051] Moreover, the diverter body 21 is located in the receiving cavity, with the bottom abutting against the side wall of the receiving cavity, and the diverter body 21 and the copper bus 22 are connected to the box body 1, which can provide Z-direction support for the diverter, that is, it can provide better support for the diverter along the height direction of the box body 1, which can also reduce the occurrence of stress.

[0052] In this embodiment, Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, a mounting portion 102 connected to an external component is provided on the box body 1. The provision of the mounting portion 102 can facilitate the installation and fixation of the box body 1 on the external component. Specifically, the mounting portion 102 includes a mounting lug 101 provided on the box body 1, and a mounting hole provided on the mounting lug 101, and the box body 1 is connected to the external component through a connector inserted in the mounting hole.

[0053] In the specific implementation, the mounting hole is preferably formed by a threaded hole with an embedded nut embedded in the box body 1. The mounting ears 101 are preferably two oppositely arranged, and the corresponding mounting holes are also two oppositely arranged. In addition, the external component can be, for example, a battery pack box or other components.

[0054] As a preferred implementation, in this embodiment, an anti-mistake installation portion 103 is also provided on the box body 1. The provision of the anti-mistake installation portion 103 can effectively prevent the problem that the subsequent copper busbar 22 cannot be installed due to the assembly error of the box body 1. Specifically, the anti-mistake installation portion 103 includes an anti-mistake installation hole provided on the box body 1, and as a preferred embodiment, the anti-mistake installation hole is preferably provided on one of the mounting ears 101. In the specific implementation, a positioning member can be provided on the external component, and the positioning member and the anti-mistake installation hole are positioned to ensure the correct installation direction of the box body 1, and avoid disassembling the box body 1 again.

[0055] In this embodiment, see Figures 1 to 6 As shown, the box body 1 of this embodiment includes a lower box body 11 and an upper cover 12 that are connected by buckling, and a receiving cavity is formed between the lower box body 11 and the upper cover 12. The diverter body 21 is connected to the lower box body 11, and the limiter 20 is provided on the upper cover 12. This structure can not only facilitate the installation of the diverter body 21, but also provide better support for the diverter body 21 and reduce the occurrence of stress.

[0056] As a preferred implementation, in this embodiment, the lower box body 11 and the upper cover 12 are connected by snap-fitting, which can facilitate the disassembly and assembly of the lower box body 11 and the upper cover 12, and also facilitate the replacement of the diverter body 21.

[0057] In terms of specific structure, a clamping protrusion 111 is provided on the lower box body 11, and a clamping arm 122 with a clamping hole 1221 is provided on the upper cover 12. The clamping protrusion 111 can be clamped in the clamping hole 1221, and the clamping arm 122 is operated in the direction pointing to the box body to release the clamping of the clamping protrusion 111 in the clamping hole 1221. The clamping cooperation between the clamping protrusion 111 and the clamping hole 1221 is adopted, and its structure is simple and easy to operate, and the surrounding installation and disassembly space requirements are small, and it is also easy to disassemble. In specific implementation, in this embodiment, the clamping protrusion 111 and the clamping arm 122 are arranged in a plurality of groups on the box body 1 relatively, and the clamping of the clamping protrusion 111 and the clamping hole 1221 can be released by operating two relatively groups of clamping arms 122 to press them toward each other.

[0058] The shunt protection box of this embodiment can not only avoid the risk of high voltage contact due to the exposure of the copper bus 22, but also effectively isolate the electrical connection with the surrounding conductors, reduce the requirements for electrical clearance and creepage distance, and also limit the jumping of the shunt body 21, thereby improving the protection effect of the shunt.

[0059] Embodiment 2

[0060] This embodiment relates to a battery pack, in which the shunt protection box of the first embodiment is provided, that is, the shunt in the battery pack is installed in the shunt protection box of the first embodiment.

[0061] The battery pack of this embodiment adopts the shunt protection box of the first embodiment, which can better protect the shunt and help to increase the service life of the battery pack.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A diverter protection box, characterized in that: It comprises a box body with a receiving cavity, a copper bar protection part arranged on the box body and a limiting part arranged in the box body; The receiving cavity is used to receive the diverter body, and the diverter body is provided with a copper bar; The copper bar protection part comprises a protection groove connected to the receiving cavity, one end of the copper bar is located in the protection groove and connected to the diverter body, and the other end extends to the outside of the receiving cavity; The limiting portion can abut against the diverter body, so that when the diverter body is displaced along the height direction of the box body, the limiting portion can limit the diverter body.

2. The diverter protection box according to claim 1, characterized in that: The box body is provided with a connecting portion, and the copper busbar and the diverter body are connected to the box body via a connecting piece connected to the connecting portion.

3. The diverter protection box according to claim 2, characterized in that: The connecting portion includes a connecting hole provided on the box body, and the connecting member is screwed into the connecting hole; or, The connecting part comprises an insert nut embedded in the box body, and the connecting piece is threadedly connected to the insert nut; or, The connecting portion includes a stud arranged on the box body, and the connecting piece includes a nut threadedly connected to the stud.

4. The diverter protection box according to claim 1, characterized in that: The limiting portion includes a limiting rib arranged on the inner wall of the box body, and a gap L between the limiting rib and two opposite end surfaces of the diverter body is between 0.3 mm and 0.5 mm.

5. The diverter protection box according to claim 1, characterized in that: The box body is provided with a mounting portion connected to the external component; and / or, The box body is provided with an anti-mistake installation portion.

6. The diverter protection box according to claim 5, characterized in that: The mounting portion includes a mounting lug provided on the box body, and a mounting hole provided on the mounting lug, and the box body is connected to the external component via a connector passed through the mounting hole; and / or the anti-error mounting portion includes an anti-error mounting hole provided on the box body.

7. The diverter protection box according to any one of claims 1 to 6, characterized in that: The box body comprises a lower box body and an upper cover which are buckled and connected, and the receiving cavity is formed between the lower box body and the upper cover; The diverter body is connected to the lower box body, and the limiting portion is arranged on the upper cover.

8. The diverter protection box according to claim 7, characterized in that: The lower box body and the upper cover are connected by snap connection.

9. The diverter protection box according to claim 8, characterized in that: The lower box body is provided with a clamping protrusion, and the upper cover is provided with a clamping arm with a clamping hole; The clamping protrusion can be clamped in the clamping hole, and the clamping arm can be operated in a direction pointing to the box body to release the clamping protrusion from the clamping hole.

10. A battery pack, characterized in that: The battery pack is provided with a shunt protection box as claimed in any one of claims 1 to 9.

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