BDU injection molding structure

Abstract

The utility model discloses a BDU injection molding structure, which comprises an injection molding shell, a contactor, two copper bars and two connecting bolts, a sleeve body is formed at the lower part of the injection molding shell, the contactor is arranged in the sleeve body, the upper end of the contactor is provided with two contacts, the two copper bars are respectively arranged at the upper ends of the two contacts, and the two connecting bolts are respectively arranged at the upper ends of the two contacts. The two copper bars are both embedded in the upper end of the injection molding shell, a contact surface is formed at the upper end of each copper bar, each contact surface is concave downwards to form a groove, a through hole is formed in the bottom of each groove, and the connecting bolt penetrates through the through hole and is connected with the contact. Through the application of the utility model, an injection molding structure suitable for BDU production is provided, the copper bar is integrally installed on the housing through the injection molding design, the installation process of the product is simplified, and the production efficiency is improved; and through the concave arrangement of the copper bar, the connecting bolt connected with the contactor does not protrude out of the surface of the copper bar, so that the surface of the copper bar is in contact with the cooling assembly conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of battery charging and discharging, in particular to a BDU injection molding structure. Background Art

[0002] In the prior art, with the further development of the new energy field, a corresponding BDU, i.e., a power cut-off unit, is often designed inside the battery pack to achieve functions such as charge and discharge control and circuit overload and short circuit protection. Common BDUs on the market generally integrate functional components such as copper busbars and contactors.

[0003] However, in the process of designing and producing the existing BDU, the copper busbar is often difficult to install, and the copper busbar is prone to partial warping after installation. At the same time, in order to ensure the normal operation of the BDU, a corresponding cooling structure is often arranged on the outside of the BDU to transfer the heat generated by the BDU during operation. However, when the copper busbar of the existing BDU is installed by bolts and other components, the upper end of the bolt protrudes from the surface of the copper busbar, which interferes with the installation of the cooling structure. Utility Model Content

[0004] In view of this, in order to solve the above problems, the purpose of the utility model is to provide a BDU injection molding structure, including: an injection molding shell, a contactor, two copper bars and two connecting bolts, the lower part of the injection molding shell forms a sleeve, the contactor is installed in the sleeve, the upper end of the contactor has two contacts, the two copper bars are respectively arranged at the upper ends of the two contacts, the two copper bars are embedded in the upper end of the injection molding shell, the upper end of the copper bar is formed with a contact surface, the contact surface is concave to form a groove, the bottom of the groove is provided with a through hole, the connecting bolt passes through the through hole and is connected to the contact.

[0005] In another preferred embodiment, the upper end of the connecting bolt is disposed in the groove, and the level of the upper end of the connecting bolt is lower than the level of the contact surface.

[0006] In another preferred embodiment, the copper busbar is integrally embedded in the upper end of the injection-molded housing through injection molding of the injection-molded housing.

[0007] In another preferred embodiment, the outer edge of the copper busbar is concave inwardly in the horizontal direction to form a pit.

[0008] In another preferred embodiment, the upper end of the injection-molded housing has a plastic filling layer, and the plastic filling layer is arranged to surround the outer edge of the contact surface.

[0009] In another preferred embodiment, the plastic filling layer also covers the upper end of the groove.

[0010] In another preferred embodiment, it further comprises: a cooling component, wherein the cooling component is arranged at the upper end of the injection-molded shell, and the cooling component is arranged in contact with the contact surface.

[0011] In another preferred embodiment, the lower end of the sleeve is open, and the contactor can be installed in the sleeve from bottom to top.

[0012] In another preferred embodiment, the upper end of the contactor has a partition.

[0013] In another preferred embodiment, an insertion opening is reserved at the upper end of the injection-molded shell, and the partition extends into the insertion opening.

[0014] Due to the adoption of the above technical solution, the utility model has the following positive effects compared with the prior art: through the application of the utility model, an injection molding structure suitable for BDU production is provided, and the copper busbar is integrally installed on the shell through the injection molding design, which simplifies the installation process of the product and improves the production efficiency; and the concave setting of the copper busbar makes it possible for the connecting bolt connected to the contactor not to protrude from the surface of the copper busbar, thereby facilitating the contact between the surface of the copper busbar and the cooling assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a first schematic diagram of a BDU injection molding structure of the utility model;

[0016] Figure 2 It is a second schematic diagram of a BDU injection molding structure of the utility model;

[0017] Figure 3 It is a schematic diagram of a non-injection molded shell of a BDU injection molded structure of the utility model.

[0018] In the attached figure:

[0019] 1. Injection molded housing; 2. Contactor; 3. Copper busbar; 4. Connecting bolt; 5. Sleeve; 6. Groove; 7. Through hole; 8. Pit; 9. Plastic filling layer; 10. Partition; 11. Insertion port. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0021] like Figures 1 to 3As shown, a preferred embodiment of the BDU injection molding structure is shown, including: an injection molding housing 1, a contactor 2, two copper bars 3 and two connecting bolts 4. A sleeve 5 is formed at the lower part of the injection molding housing 1, and the contactor 2 is installed in the sleeve 5. The upper end of the contactor 2 has two contacts, and the two copper bars 3 are respectively arranged at the upper ends of the two contacts. The two copper bars 3 are both embedded in the upper end of the injection molding housing 1. The upper end of the copper bar 3 is formed with a contact surface, and the contact surface is concave to form a groove 6. The bottom of the groove 6 is provided with a through hole 7, and the connecting bolt 4 passes through the through hole 7 and is connected to the contact. Further, the copper bar 3 is relatively integrally arranged on the injection molding housing 1, and a groove 6 that is concave downward is arranged on the upper surface of the copper bar 3, so that the upper end head of the connecting bolt 4 is accommodated in the groove 6. After the contactor 2 is inserted into the sleeve 5, its contact can be aligned with the corresponding through hole 7, so that the connecting bolt 4 extends from top to bottom into the groove 6 and connects with the contact of the contactor 2 after passing through the through hole 7.

[0022] Further, as a preferred embodiment, the upper end of the connecting bolt 4 is disposed in the groove 6, and the level of the upper end of the connecting bolt 4 is lower than the level of the contact surface. Furthermore, the spatial avoidance achieved by the groove 6 can make the upper end of the connecting bolt 4 be at a lower position without interfering with the contact between the contact surface and the cooling component.

[0023] Further, as a preferred embodiment, the copper bar 3 is integrally embedded in the upper end of the injection molded housing 1 through the injection molding of the injection molded housing 1. Further, the copper bar 3 is pre-installed into the corresponding position of the injection molding cavity during the injection molding, so that the copper bar 3 is directly and integrally arranged on the outer surface of the injection molded housing 1 after the injection molding is completed.

[0024] Further, as a preferred embodiment, the outer edge of the copper busbar 3 is concave in the horizontal direction to form a pit 8. Further, the pit 8 is formed at the edge of the copper busbar 3, and the lowest point of the pit 8 is connected to the outer side of the copper busbar 3 at least in the horizontal direction.

[0025] Further, as a preferred embodiment, the upper end of the injection-molded housing 1 has a plastic filling layer 9, and the plastic filling layer 9 surrounds the outer edge of the contact surface. Further, the plastic filling layer 9 is formed by filling with injection glue or other materials used during injection molding, and the plastic filling layer 9 surrounds the outer edge of the copper bar 3 so that it can limit the copper bar 3 and prevent it from warping during the injection molding pressure process or subsequent use.

[0026] Further, as a preferred embodiment, the plastic filling layer 9 at least partially covers the inside of the pit 8 .

[0027] Furthermore, as a preferred embodiment, the plastic filling layer 9 also covers the upper end of the groove 6 .

[0028] Further, as a preferred embodiment, it also includes: a cooling component, which is arranged at the upper end of the injection molded shell 1 and is arranged in contact with the contact surface. Further, the cooling component is in contact with the contact surface to achieve heat exchange, so that the BDU can achieve cooling and heat dissipation during operation.

[0029] Furthermore, as a preferred embodiment, the cooling assembly includes: a water-cooling plate and a thermal pad, and the thermal pad is clamped between the contact surface of the water-cooling plate and the copper busbar 3 .

[0030] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention.

[0031] The utility model also has the following implementation methods based on the above:

[0032] In a further embodiment of the present invention, the lower end of the sleeve 5 is open, and the contactor 2 can be installed in the sleeve 5 from bottom to top.

[0033] In a further embodiment of the present invention, the sleeve body 5 is arranged to extend downward.

[0034] In a further embodiment of the present invention, a plurality of reinforcing ribs extending in the vertical direction are arranged on the outer wall of the sleeve body 5 .

[0035] In a further embodiment of the present invention, a partition 10 is provided at the upper end of the contactor 2 .

[0036] In a further embodiment of the present invention, an insertion opening 11 is reserved at the upper end of the injection-molded housing 1 , and the partition 10 extends into the insertion opening 11 .

[0037] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A BDU injection molding structure, characterized in that: include: An injection molded shell, a contactor, two copper bars and two connecting bolts, wherein a sleeve is formed at the lower part of the injection molded shell, the contactor is installed in the sleeve, the upper end of the contactor has two contacts, two copper bars are respectively arranged at the upper ends of the two contacts, and the two copper bars are embedded in the upper end of the injection molded shell, a contact surface is formed at the upper end of the copper bar, the contact surface is concave to form a groove, a through hole is provided at the bottom of the groove, and the connecting bolt passes through the through hole and is connected to the contact.

2. The BDU injection molding structure according to claim 1, characterized in that: The upper end of the connecting bolt is arranged in the groove, and the level of the upper end of the connecting bolt is lower than the level of the contact surface.

3. The BDU injection molding structure according to claim 1, characterized in that: The copper busbar is integrally embedded in the upper end of the injection-molded housing through injection molding of the injection-molded housing.

4. The BDU injection molding structure according to claim 1, characterized in that: The outer edge of the copper busbar is concave inwardly in the horizontal direction to form a pit.

5. The BDU injection molding structure according to claim 4, characterized in that: The upper end of the injection-molded housing is provided with a plastic filling layer, and the plastic filling layer is arranged to surround the outer edge of the contact surface.

6. The BDU injection molding structure according to claim 5, characterized in that: The plastic filling layer also covers the upper end of the groove.

7. The BDU injection molding structure according to claim 1, characterized in that: It also includes: a cooling component, which is arranged at the upper end of the injection molding shell and is arranged in contact with the contact surface.

8. The BDU injection molding structure according to claim 1, characterized in that: The lower end of the sleeve is open, and the contactor can be installed in the sleeve from bottom to top.

9. The BDU injection molding structure according to claim 1, characterized in that: The upper end of the contactor is provided with a partition.

10. The BDU injection molding structure according to claim 9, characterized in that: An insertion opening is reserved at the upper end of the injection-molded shell, and the partition extends into the insertion opening.

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