Battery pack and fuse box thereof

Abstract

The invention belongs to the technical field of power supply equipment, and particularly provides a battery pack and a fuse box thereof. The battery pack fuse box comprises a battery pack base and an upper cover which is fixedly connected with the base to define a fuse arrangement cavity, the base is provided with two connecting point positions which are used for being connected and matched with two contact knives of a fuse, the battery pack fuse box is further provided with a protective cover, and the protective cover is located in the fuse arrangement cavity. The protective cover comprises a covering face used for covering the connecting point positions and a connecting part used for being connected with the base. The battery pack comprises the battery pack fuse box. The protective cover is additionally arranged at the connecting point of the fuse box base, so that the electric shock prevention, dust prevention and water prevention performance of the fuse box is enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of power supply equipment, and in particular relates to a battery pack and a fuse box thereof. Background Art

[0002] The insurance of commercial vehicle battery packs or distribution boxes mainly includes three solutions: integrated in the maintenance switch, external fuse box and configured maintenance window.

[0003] The fuse of the maintenance switch is usually placed inside the plug, and an elastic conductor is required to contact the plug and the socket. However, as the demand for high voltage and high current of power batteries becomes more and more urgent, the size of the fuse required is also getting larger and larger, which puts higher requirements on the design of the internal structure of the maintenance switch. Therefore, the size and cost of the maintenance switch for the high voltage platform are both high.

[0004] The external fuse box is a box containing fuses placed outside the battery pack. In order to reserve safe electrical clearance and creepage distance, it is generally larger in size. In addition, the vehicle needs to reserve a suitable location for wiring harnesses, which increases the layout cost of the vehicle.

[0005] The maintenance window is a reserved fuse window on the battery pack box corresponding to the fuse position. The window cover and the box body are sealed together to achieve quick replacement and maintenance of the fuse. However, this solution will increase the risk of overall sealing failure of the battery pack. Moreover, after the maintenance window is opened, the internal parts of the battery pack will be directly exposed, and there is a risk of electric shock when personnel are repairing, and the protection performance is poor.

[0006] The patent with the authorization announcement number CN206574789U (publication date: 2017.10.20) provides a power battery fuse box, which includes a base and an upper cover. The base is used to be sealed with the inner wall of the battery pack box, and the upper cover is used to be sealed with the outside of the battery pack box. The base and the upper cover together form a setting cavity for installing the fuse. When repairing the fuse box, only the upper cover needs to be removed, and the base and the box are still sealed, which is convenient for the maintenance of the battery pack.

[0007] However, the fuse box has only one upper cover for protection. After opening the upper cover, the live parts of both ends of the locked fuse are directly exposed, and its protection performance is also poor. Summary of the invention

[0008] The object of the present invention is to provide a battery pack fuse box to solve the technical problem that the fuse box in the prior art has insufficient protection performance. The object of the present invention is also to provide a battery pack to solve the same technical problem as above.

[0009] To achieve the above purpose, the technical solution of the battery pack fuse box provided by the present invention is:

[0010] A battery pack fuse box comprises a base and an upper cover fixedly connected to the base to enclose a fuse setting cavity, the base is provided with two connection points for connecting with two contacts of the fuse, the battery pack fuse box is also provided with a protective cover, the protective cover is located in the fuse setting cavity, the protective cover comprises a cover surface for covering the connection points and a connecting portion for connecting to the base.

[0011] The beneficial effect is that the present invention improves the fuse box for battery packs in the prior art, and a protective cover is provided in the fuse setting cavity between the fuse box and the base, the protective cover is connected to the base, and can cover the live part of the connection end of the fuse. After the upper cover is opened for maintenance, the protective cover serves as a second line of protection against electric shock, and the maintenance personnel need to remove the protective cover before disassembling and assembling the fuse, thereby improving the safety protection effect of the disassembly and assembly operation. At the same time, the protective cover can also improve the dustproof and waterproof capabilities of the fuse box to a certain extent, which is equivalent to adding a sealing structure and improving the overall protection effect.

[0012] As a further improvement, the base is provided with a connecting groove, the connecting point is arranged in the connecting groove, and the connecting portion includes a connecting structure for connecting to a side wall of the connecting groove.

[0013] The beneficial effect is that the side wall can also play a protective role, and the protective cover and the side wall can be used together to simplify the structure of the protective cover. In addition, for the side wall integrally formed with the base, the connection risk point close to the live part of the fuse is reduced, ensuring a good protective effect.

[0014] As a further improvement, the connection structure includes a snap-fit ​​structure, and the protective cover is connected to the side wall via the snap-fit ​​structure.

[0015] The beneficial effect is that the buckle structure does not need to set connection holes on the side wall or the protective cover, further reducing the connection risk points.

[0016] As a further improvement, the buckle structure includes a wedge-shaped block provided at the connecting portion, and the side wall is provided with a stop block for engaging with the wedge-shaped block.

[0017] The beneficial effect is that both the wedge block and the stop block are convex structures, and the stop matching structure is more stable.

[0018] As a further improvement, the stop block is arranged on the inner wall surface of the side wall.

[0019] The beneficial effect is that the side wall is used to provide the protective cover with internal pressure to maintain the connection. Compared with the solution of snapping the protective cover on the outside of the side wall, this design has better stability.

[0020] As a further improvement, the protective cover also has a supporting portion for supporting an upper cover of the battery pack fuse box.

[0021] The beneficial effect is that the protective cover not only plays a protective role, but also plays a supporting role, thereby improving the overall strength of the battery pack. When the battery pack is accidentally squeezed, the protective cover can also serve as a force transmission member to transmit the deformation pressure to the fuse box base, thereby improving the safety protection performance.

[0022] As a further improvement, the upper cover of the fuse box is provided with a sealing ring structure for sealingly cooperating with the outer wall of the battery pack case, and the base is provided with a sealing ring structure for sealingly cooperating with the inner wall of the battery pack case. The sealing ring structure provided on the upper cover and the sealing ring structure provided on the base correspond to each other inside and outside and have the same size.

[0023] The beneficial effects are: improving the versatility of materials and reducing costs.

[0024] As a further improvement, a conductive column is provided at the connection point, and a conductive column sealing ring is provided between the conductive column and the base.

[0025] The beneficial effect is that even when the upper cover is opened and only the base and the battery pack are fitted, there is still a good sealing and waterproofing effect, achieving single-seat waterproofing.

[0026] As a further improvement, the base is further provided with a ventilation valve, and the ventilation valve is a one-way valve.

[0027] The beneficial effect is that when the fuse is blown, the vent valve can relieve pressure and cool the battery pack, thereby improving safety. At the same time, the one-way sealing effect of the one-way valve also ensures the waterproof performance of the base at this time.

[0028] To achieve the above purpose, the technical solution of the battery pack provided by the present invention is:

[0029] A battery pack includes a box body, to which a fuse box is connected, the fuse box includes a base and an upper cover fixedly connected to the base to enclose a fuse setting cavity, the base is provided with two connection points for connecting with two contacts of the fuse, the battery pack fuse box is also provided with a protective cover, the protective cover is located in the fuse setting cavity, the protective cover includes a cover surface for covering the connection points and a connecting portion for connecting to the base.

[0030] The beneficial effect is that the present invention improves the fuse box of the battery pack in the prior art, and a protective cover is provided in the fuse setting cavity between the fuse box and the base, the protective cover is connected to the base, and can cover the live part of the connection end of the fuse. After the upper cover is opened for maintenance, the protective cover serves as a second line of protection against electric shock, and the maintenance personnel need to remove the protective cover before disassembling and assembling the fuse, thereby improving the safety protection effect of the disassembly and assembly operation. At the same time, the protective cover can also improve the dustproof and waterproof capabilities of the fuse box to a certain extent, which is equivalent to adding a sealing structure and improving the overall protection effect.

[0031] As a further improvement, the base is provided with a connecting groove, the connecting point is arranged in the connecting groove, and the connecting portion includes a connecting structure for connecting to a side wall of the connecting groove.

[0032] The beneficial effect is that the side wall can also play a protective role, and the protective cover and the side wall can be used together to simplify the structure of the protective cover. In addition, for the side wall integrally formed with the base, the connection risk point close to the live part of the fuse is reduced, ensuring a good protective effect.

[0033] As a further improvement, the connection structure includes a snap-fit ​​structure, and the protective cover is connected to the side wall via the snap-fit ​​structure.

[0034] The beneficial effect is that the buckle structure does not need to set connection holes on the side wall or the protective cover, further reducing the connection risk points.

[0035] As a further improvement, the buckle structure includes a wedge-shaped block arranged at the connecting portion, and the side wall is provided with a stop block for engaging with the wedge-shaped block.

[0036] The beneficial effect is that both the wedge block and the stop block are convex structures, and the stop matching structure is more stable.

[0037] As a further improvement, the stop block is arranged on the inner wall surface of the side wall.

[0038] The beneficial effect is that the side wall is used to provide the protective cover with internal pressure to maintain the connection. Compared with the solution of snapping the protective cover on the outside of the side wall, this design has better stability.

[0039] As a further improvement, the protective cover also has a supporting portion for supporting an upper cover of the battery pack fuse box.

[0040] The beneficial effect is that the protective cover not only plays a protective role, but also plays a supporting role, thereby improving the overall strength of the battery pack. When the battery pack is accidentally squeezed, the protective cover can also serve as a force transmission member to transmit the deformation pressure to the fuse box base, thereby improving the safety protection performance.

[0041] As a further improvement, the upper cover of the fuse box is provided with a sealing ring structure for sealingly cooperating with the outer wall of the battery pack case, and the base is provided with a sealing ring structure for sealingly cooperating with the inner wall of the battery pack case. The sealing ring structure provided on the upper cover and the sealing ring structure provided on the base correspond to each other inside and outside and have the same size.

[0042] The beneficial effects are: improving the versatility of materials and reducing costs.

[0043] As a further improvement, a conductive column is provided at the connection point, and a conductive column sealing ring is provided between the conductive column and the base.

[0044] The beneficial effect is that even when the upper cover is opened and only the base and the battery pack are fitted, there is still a good sealing and waterproofing effect, achieving single-seat waterproofing.

[0045] As a further improvement, the base is further provided with a ventilation valve, and the ventilation valve is a one-way valve.

[0046] The beneficial effect is that when the fuse is blown, the vent valve can relieve pressure and cool the battery pack, thereby improving safety. At the same time, the one-way sealing effect of the one-way valve also ensures the waterproof performance of the base at this time. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a schematic diagram of the structure of a battery pack fuse box embodiment 1 of the present invention;

[0048] Figure 2 for Figure 1 Schematic diagram of the structure of the middle base;

[0049] Figure 3 for Figure 1 A cross-sectional view showing the location of the middle protective cover;

[0050] Figure 4 for Figure 1 Schematic diagram of the structure of the middle upper cover;

[0051] Figure 5 for Figure 1 A cross-sectional view of the middle base;

[0052] Figure 6 for Figure 1 Schematic diagram of the structure of the protective cover.

[0053] Description of reference numerals:

[0054] 1. Base; 2. Upper cover; 3. Fuse; 4. Sealing ring structure; 5. Protective cover; 6. Fastening screws; 101. Connection groove; 102. Conductive column; 103. Breathing valve; 104. Stop block; 105. Conductive column seal; 501. Wedge block; 502. Buckle part. DETAILED DESCRIPTION

[0055] The present invention is further described in detail below in conjunction with embodiments.

[0056] In order to improve the protection performance of the fuse box, the present invention adds a protective cover to the connection point with the fuse contact in the fuse box, which is equivalent to adding a protective layer, thereby improving the overall anti-touch performance of the fuse box.

[0057] Specific embodiment 1 of the battery pack fuse box provided by the present invention:

[0058] The battery pack fuse box provided in this embodiment can refer to Figure 1 , mainly including a base 1 and an upper cover 2. The base 1 can be connected to the inner wall of the battery box by screws, and has a sealing end for sealing with the inner wall of the box. The upper cover 2 can be connected to the outer wall of the battery box by screws, and has a sealing end for sealing with the outer wall of the box. The base 1 and the upper cover 2 together enclose a fuse setting cavity for installing a fuse. Figure 1 and Figure 4 As shown, the sealing end of the base 1 and the sealing end of the upper cover 2 are both provided with a sealing ring structure 4, and the positions of the sealing ring structures 4 provided on the base 1 and the upper cover 2 correspond to each other inside and outside, and the sizes are consistent, which makes the material more versatile and reduces the material cost. Moreover, in this embodiment, the sealing ring structure 4 includes two sealing rings arranged inside and outside, and the two sealing rings improve the overall sealing performance and are more likely to meet the requirements of IP68 level. Of course, in other embodiments, if space permits, more than two sealing rings can also be arranged.

[0059] In this embodiment, two connection points for connecting the contacts of the fuse 3 are provided on the base 1. The contacts at both ends of the fuse 3 are connected to the conductive columns 102 provided at the two connection points using fastening screws 6. The conductive columns 102 are used to be electrically connected to the conductive bus of the battery pack, thereby realizing the connection between the fuse 3 and the battery pack circuit.

[0060] In order to improve the protection performance of the fuse box, a protective cover 5 is added in this embodiment. The protective cover 5 is an insulating protective cover, which has a cover surface for covering the connection points of the base, and plays the role of overall shielding and covering the connection points. After installing the fuse 3, the protective cover 5 can be connected to the base 1 and fixed on the base, that is, the protective cover 5 should also have a connection portion for connecting with the base 1. At this time, when the upper cover 2 is opened to replace the fuse 3, the protective cover 5 still covers the connection points of the fuse 3, which plays the role of preventing finger touch and improving safety.

[0061] In this embodiment, Figure 2As shown, the base 1 is provided with a connection groove 101, and the connection groove 101 forms a connection point of the base 1 for connecting with the contact blade of the fuse 3. In this way, the connection groove 101 itself can also play a protective role. The protective cover 5 is used to connect with the side wall of the connection groove 101, and cooperates with the connection groove 101 to play a protective role. In this case, the protective cover 5 does not need to be large in size and has a simple structure. Moreover, the side wall of the connection groove 101 can also be integrally formed with the base 1, so that there is no connection seam near the contact blade of the fuse 3, reducing the risk point of protection failure.

[0062] Furthermore, in this embodiment, the protective cover 5 and the connecting groove 101 are stably connected through a buckle structure. Figure 3 , Figure 5 and Figure 6 As shown, the buckle structure includes a wedge block 501 provided on the protective cover 5 and a stop block 104 provided on the connection groove 101, and the wedge block 501 and the stop block 104 are engaged with each other to prevent the protective cover 5 from withdrawing outward from the connection groove 101. Specifically, the stop block 104 is provided on the inner wall surface of the connection groove 101, so that the connection groove 101 is used to provide a holding force for the elastic deformation of the connection portion of the protective cover 5 provided with the wedge block 501, so that the connection stability is better.

[0063] In addition, in this embodiment, the protective cover 5 also has a supporting portion for supporting the upper cover 2. For example, the upper portion of the protective cover 5 can directly contact the upper cover 2. In this way, in addition to playing a protective role, the protective cover 5 can also support the upper cover 2 to strengthen the strength of the fuse box. Moreover, if the battery pack is accidentally squeezed and deformed, the squeezing force can also be transmitted to the base 1 through the protective cover 5, further protecting the fuse 3 and improving the safety performance of the fuse box. The protective cover 5 also has a buckling portion 502 for buckling the fuse 3. At this time, the buckling portion 502 can also stabilize the fuse 3 to a certain extent, improving the adaptability of the fuse box under strong vibration conditions.

[0064] Furthermore, if Figure 5 As shown, in this embodiment, a conductive column sealing ring 105 is provided between the conductive column 102 and the base 1, and the conductive column sealing ring 105 serves to isolate the inner and outer parts of the conductive column 102, thereby preventing external impurities or water from entering the battery pack from the conductive column 102 after the upper cover 2 is opened. At the same time, since the base 1 and the inner wall of the battery pack are sealed, when the fuse box in this embodiment is applied to the battery pack, after the upper cover 2 is opened, the base 1 and the battery pack cooperate to still have a waterproof effect, that is, a single seat waterproof is achieved, and the waterproof sealing performance is improved.

[0065] In order to further improve the safety performance of the fuse box, in this embodiment, a vent valve 103 is also provided on the base 1. When the fuse 3 is blown, the vent valve 103 can relieve pressure and reduce temperature, further ensuring the safety of the fuse box. The vent valve 103 in this embodiment is a one-way valve. At this time, while ensuring the ventilation effect, it can also play a sealing role after opening the upper cover 2, and can also achieve single-seat waterproofing.

[0066] The specific embodiment 2 of the battery pack fuse box provided by the present invention is different from the embodiment 1 mainly in that: in the embodiment 1, the connection point of the base is formed by the connection groove. In this embodiment, the base may not include the connection groove, in which case the protective cover may be appropriately enlarged, and a covering cavity is directly formed by the protective cover to play a covering role. Of course, in this case, the protective cover may be enlarged as a whole, so that one protective cover covers two connection points.

[0067] The specific embodiment 3 of the battery pack fuse box provided by the present invention is different from the embodiment 1 mainly in that: in the embodiment 1, the stopper is arranged on the inner wall surface of the side wall of the connection groove. In this embodiment, the stopper can be arranged on the outer wall surface of the side wall of the connection groove, and the protective cover is integrally mounted on the outer side of the connection groove, and the elastic deformation of the protective cover is used to maintain a stable connection.

[0068] The specific embodiment 4 of the battery pack fuse box provided by the present invention is different from the embodiment 1 mainly in that: in the embodiment 1, the protective cover and the connecting groove are connected by a snap-fit ​​connection, so there is no need to open a connecting hole, and it is easier to achieve sealing protection. In this embodiment, the protective cover and the connecting groove can also be connected by a connecting bolt.

[0069] The specific embodiment 5 of the battery pack fuse box provided by the present invention is different from the embodiment 1 mainly in that: in the embodiment 1, the buckle structure between the protective cover and the side wall of the connecting groove includes a wedge block and a stop block. In this embodiment, the buckle structure can be composed of a spring claw arranged on the protective cover and a clamping groove arranged on the side wall of the connecting groove.

[0070] Embodiment of the battery pack of the present invention:

[0071] The battery pack includes a box body, on which is disposed a battery pack fuse box as described in any one of Embodiments 1 to 5 of the battery pack fuse box, which will not be described in detail here.

[0072] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery pack fuse box, comprising a base and an upper cover fixedly connected to the base to enclose a fuse setting cavity, the base being provided with two connection points for connecting and cooperating with two contact blades of the fuse, characterized in that: The battery pack fuse box is also equipped with a protective cover, which is located in the fuse setting cavity. The protective cover includes a cover surface for covering the connection point and a connecting portion for connecting to the base.

2. The battery pack fuse box according to claim 1, characterized in that: The base is provided with a connecting groove, the connecting point is arranged in the connecting groove, and the connecting part comprises a connecting structure for connecting with a side wall of the connecting groove.

3. The battery pack fuse box according to claim 2, characterized in that: The connection structure comprises a buckle structure, and the protective cover is connected to the side wall via the buckle structure.

4. The battery pack fuse box according to claim 3, characterized in that: The buckle structure comprises a wedge-shaped block arranged at the connecting portion, and the side wall is provided with a stop block for stopping and cooperating with the wedge-shaped block.

5. The battery pack fuse box according to claim 4, characterized in that: The stopping block is arranged on the inner wall surface of the side wall.

6. The battery pack fuse box according to any one of claims 1 to 5, characterized in that: The protective cover also has a supporting portion for supporting an upper cover of the battery pack fuse box.

7. The battery pack fuse box according to any one of claims 1 to 5, characterized in that: The upper cover of the fuse box is provided with a sealing ring structure for sealing with the outer wall of the battery pack case, and the base is provided with a sealing ring structure for sealing with the inner wall of the battery pack case. The sealing ring structure provided on the upper cover and the sealing ring structure provided on the base correspond to each other inside and outside and have the same size.

8. The battery pack fuse box according to any one of claims 1 to 5, characterized in that: A conductive column is provided at the connection point, and a conductive column sealing ring is provided between the conductive column and the base.

9. The battery pack fuse box according to any one of claims 1 to 5, characterized in that: The base is also provided with a ventilation valve, and the ventilation valve is a one-way valve.

10. A battery pack, comprising a box body, a fuse box connected to the box body, characterized in that: The fuse box is the battery pack fuse box as described in any one of claims 1-9.

Images