BDU base and battery pack BDU assembly

Abstract

The BDU base comprises a bottom shell, a top shell, a cover plate and a limiting plate, an opening is formed in one face of the bottom shell, and a first clamping groove is formed in the edge of the opening of the bottom shell; the top shell seals the opening of the bottom shell, and the top shell is provided with a second clamping groove corresponding to the first clamping groove; the cover plate is inserted into the second clamping groove and is inserted into the first clamping groove; the limiting plate is arranged at the end, inserted into the second clamping groove, of the cover plate, and the limiting plate is perpendicular to the surface of the cover plate. The first clamping groove and the second clamping groove which are used for installing the cover plate are formed in the edges of the bottom shell and the top shell respectively, so that the forming difficulty of the bottom shell and the top shell is reduced, the production cost is further reduced, the cover plate is connected with the first clamping groove in an inserted mode, the cover plate is connected with the second clamping groove in an inserted mode, and therefore installation of the cover plate is achieved; the cover plate is limited relative to the bottom shell, so that stable assembly of the cover plate is ensured; meanwhile, a limiting plate is arranged on the cover plate, so that the structural strength of the cover plate can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile BDU, in particular to a BDU base and a battery pack BDU assembly. Background Art

[0002] The BDU of electric vehicles, also known as the battery disconnect unit, plays the role of disconnecting and connecting the battery, current monitoring, insurance and protection, etc. It usually integrates a pre-charging circuit to reduce current shock. As an important part of the power system in electric vehicles, the BDU is the key to ensuring the safe and efficient operation of the battery. When connecting the BDU with other components of the power system, it is usually necessary to reserve an opening in the BDU shell for the connection of the wiring harness, and a cover plate is also required to close the reserved opening to achieve a protective effect.

[0003] The existing utility model patent with authorization announcement number CN219811669U discloses a BDU protection device, which includes a shell, a plurality of notches arranged on the shell, and a protective cover arranged at the notches; fixed bosses are arranged on the shell on both sides of the notches, and limited axis grooves are arranged on the fixed bosses; and a boss shaft that rotatably cooperates with the limited axis groove is arranged on the protective cover.

[0004] As in the above scheme, the protective cover is rotatably matched with the axis limiting groove through the boss shaft so that the protective cover can be flipped. However, in this structure, the boss shaft is easy to break, which affects the reliability of installation. At the same time, the protective cover is set on the upper part of the shell. Therefore, the groove for installing the protective cover needs to be formed simultaneously when the upper part of the shell is injection molded. This has high requirements on the mold, resulting in cost increase. Therefore, a new BDU base structure is needed. Utility Model Content

[0005] In view of this, the utility model proposes a BDU base and a battery pack BDU assembly with simple and reliable structure and low molding cost, so as to solve the problems of high molding requirements, high cost and easy failure of the existing BDU shell.

[0006] The technical solution of the utility model is achieved in this way:

[0007] On the one hand, the utility model provides a BDU base, including a bottom shell, a top shell, a cover plate and a limit plate, wherein:

[0008] One side of the bottom shell is provided with an opening, and the edge of the opening of the bottom shell is provided with a first card slot;

[0009] The top shell seals the opening of the bottom shell, and the top shell is provided with a second slot corresponding to the first slot;

[0010] The cover plate is inserted into the first card slot and the second card slot;

[0011] The limiting plate is arranged on one end of the cover plate plugged into the second card slot, and the limiting plate is perpendicular to the surface of the cover plate.

[0012] On the basis of the above technical solution, preferably, the top shell has a first edge away from the first card slot, and the first edge is provided with two limiting plates;

[0013] The two limiting plates are parallel to each other, the limiting plate has a side facing the second slot, and a baffle is provided at the end of the limiting plate away from the first edge, and the baffle is parallel to the first edge;

[0014] The cover plate is inserted into the gap between the baffle plate and the first edge.

[0015] On the basis of the above technical solution, preferably, it further comprises a latch tongue, which is an elastic member, one end of which is connected to the cover plate, and the other end of which abuts against the top shell.

[0016] On the basis of the above technical solution, preferably, the cover plate is in a shell-like structure, and one side of the cover plate is inserted into the gap between the baffle plate and the first edge.

[0017] On the basis of the above technical solution, preferably, it further comprises a reinforcing plate, which is arranged on the inner side of the cover plate and is parallel to the side edge of the cover plate plugged into the top shell;

[0018] The tab is connected to the reinforcement plate.

[0019] On the other hand, the utility model provides a battery pack BDU assembly, including the above-mentioned BDU base.

[0020] On the basis of the above technical solution, preferably, it further comprises a relay, wherein the side of the relay is provided with four legs, and the four legs are arranged in a rectangular array;

[0021] An H-shaped embedding groove is arranged inside the bottom shell, and the relay and the supporting legs are engaged in the embedding groove.

[0022] On the basis of the above technical solution, preferably, among the four legs, three legs have the same width, and the width of the other leg is larger or smaller than the three legs with the same width.

[0023] On the basis of the above technical solution, preferably, it further includes a Hall sensor, which is arranged in the bottom shell and is connected to the relay through a wiring harness;

[0024] The interface between the wiring harness and the relay is located on a leg that is a different width from the other three legs.

[0025] On the basis of the above technical solution, preferably, it also includes a pre-charging resistor and an intelligent fuse, and the pre-charging resistor and the intelligent fuse are arranged in the bottom shell, wherein,

[0026] The pre-charging resistor is electrically connected to the relay and the intelligent fuse;

[0027] The smart fuse is electrically connected to the relay;

[0028] The relays include a main negative relay, a main positive relay and a pre-charge relay.

[0029] The BDU base and battery pack BDU assembly of the utility model have the following beneficial effects compared with the prior art:

[0030] (1) By arranging the first and second slots for mounting the cover plate at the edges of the bottom shell and the top shell, respectively, the difficulty of molding the bottom shell and the top shell is reduced, thereby reducing the production cost. The cover plate is plugged into the first and second slots, so that the installation of the cover plate is achieved and the position of the cover plate relative to the bottom shell is limited, thereby ensuring the assembly stability of the cover plate. At the same time, the limit plate arranged on the cover plate can improve the structural strength of the cover plate.

[0031] (2) The cover plate is configured as a shell-like structure, and the baffle plate of the top shell and the first edge form a gap for inserting the cover plate, so that the cover plate has the advantage of being easy to install. At the same time, the cover plate with a shell-like structure has good structural strength and can ensure service life;

[0032] (3) After the cover is plugged into the top shell, the latch provides elastic force to ensure the stability of the plug-in structure; at the same time, a reinforcement plate is provided on the inner side of the cover for installing the latch, so as to support the latch independently, thereby further improving the strength of the connection structure between the cover and the latch. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a three-dimensional diagram of the BDU base of the utility model;

[0035] Figure 2 For the utility model Figure 1 A magnified view of the structure at point A;

[0036] Figure 3 A three-dimensional diagram of the BDU base of the utility model with the cover removed;

[0037] Figure 4 For the utility model Figure 3 A magnified view of the structure at point B;

[0038] Figure 5 A three-dimensional diagram of a cover plate of a BDU base of the present utility model;

[0039] Figure 6 This is a bottom structural diagram of the cover plate of the BDU base of the utility model;

[0040] Figure 7 A three-dimensional diagram of a relay of a battery pack BDU assembly of the present utility model;

[0041] Figure 8 This is a bottom structural diagram of the relay of the battery pack BDU assembly of the utility model;

[0042] Fig. 9 This is a diagram showing the internal structure of the bottom shell of the BDU base of the utility model;

[0043] Fig.10 This is the internal structure diagram of the battery pack BDU assembly of the utility model;

[0044] Fig.11 A top view of the internal structure of the battery pack BDU assembly of the utility model;

[0045] In the figure: 1, bottom shell; 101, first slot; 102, embedded slot; 2, top shell; 21, limit plate; 22, baffle; 201, second slot; 202, first edge; 3, cover plate; 4, limit plate; 5, tongue; 6, reinforcement plate; 7, relay; 71, support foot; 8, Hall sensor; 9, pre-charge resistor; 10, smart fuse. DETAILED DESCRIPTION

[0046] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0047] like Figures 1 to 11 As shown, the BDU base of the utility model includes a bottom shell 1, a top shell 2, a cover plate 3, a limit plate 4, a latch 5 and a reinforcement plate 6;

[0048] The battery pack BDU assembly of the utility model includes the above-mentioned BDU base, and also includes a relay 7, a Hall sensor 8, a pre-charging resistor 9 and an intelligent fuse 10.

[0049] like Figures 1 to 3As shown, one side of the bottom shell 1 is provided with an opening, and the edge of the opening of the bottom shell 1 is provided with a first card slot 101; the top shell 2 seals the opening of the bottom shell 1, and the top shell 2 is provided with a second card slot 201 corresponding to the first card slot 101; the cover plate 3 is inserted into the second card slot 201, and is inserted into the first card slot 101; the limiting plate 4 is provided on one end of the cover plate 3 inserted into the second card slot 201, and the limiting plate 4 is perpendicular to the surface of the cover plate 3;

[0050] As shown in the above structure, when the BDU base is formed, the installation structure of the cover plate 3 is divided into two parts, one of which is the first card slot 101 located on the bottom shell 1, and the other is the second card slot 201 located on the top shell 2. In this way, the first card slot 101 is located at the edge of the bottom shell 1, and the second card slot 201 is located at the edge of the top shell 2. This reduces the difficulty of forming during forming. In the existing structure, the card slot is located separately on the bottom shell or the top shell of the BDU shell. Since the card slot needs to lead out the wiring harness, it is a through structure, which is very inconvenient to form. This solution can effectively solve this problem.

[0051] At the same time, the cover plate 3 is inserted into the first slot 101 and the second slot 201, thus ensuring the stability of the installation of the cover plate 3; and a limit plate 4 is provided on the cover plate 3 to improve the structural strength, which reduces the risk of failure and ensures the service life.

[0052] like Figure 4 As shown, the top shell 2 has a first edge 202 away from the first card slot 101, and the first edge 202 is provided with two limit plates 21; the two limit plates 21 are parallel, and the limit plate 21 has a side facing the second card slot 201, and the end of the limit plate 21 away from the first edge 202 is provided with a baffle 22, and the baffle 22 is parallel to the first edge 202; the cover plate 3 is inserted into the gap between the baffle 22 and the first edge 202;

[0053] As in the above structure, a limiting gap is formed between the baffle 22 and the first edge 202. When installing the cover 3, the cover 3 is inserted between the baffle 22 and the first edge 202 to complete the fixation, thereby sealing the first slot 101 and the second slot 201. This can protect the wiring harness terminal when leading out the wiring harness.

[0054] like Figures 2 to 5 As shown, the tongue 5 is an elastic member, one end of the tongue 5 is connected to the cover plate 3, and the other end abuts against the top shell 2;

[0055] As in the above structure, after the cover plate 3 is plugged into the top shell 2 , the latch 5 is held against the top shell 2 , which can apply a push force to the cover plate 3 toward the baffle 22 to ensure the stability of the installation of the cover plate 3 .

[0056] like Figure 5As shown, the cover plate 3 is a shell-like structure, and one side of the cover plate 3 is inserted into the gap between the baffle 22 and the first edge 202;

[0057] As in the above structure, by setting the cover plate 3 as a shell-like structure, the side of the cover plate 3 can be inserted between the baffle 22 and the first edge 202, which facilitates the assembly of the cover plate 3 and improves the structural strength of the cover plate 3 itself.

[0058] like Figure 5 and Figure 6 As shown, the reinforcing plate 6 is arranged on the inner side of the cover plate 3, and the reinforcing plate 6 is parallel to the side edge of the cover plate 3 plugged into the top shell 2; the latch 5 is connected to the reinforcing plate 6;

[0059] As in the above structure, by providing a reinforcing plate 6 connected to the latch tongue 5, the latch tongue 5 can be reinforced to ensure the stability of the connection between the latch tongue 5 and the cover plate 3, and to avoid damage to the cover plate 3 during insertion.

[0060] like Figures 7 to 9 As shown, the side of the relay 7 is provided with four legs 71, and the four legs 71 are arranged in a rectangular array; the interior of the bottom shell 1 is provided with an H-shaped embedding groove 102, and the relay 7 and the legs 71 are engaged in the embedding groove 102;

[0061] As in the above structure, when the relay 7 is arranged, the relay 7 together with the four legs 71 are inserted into the embedding groove 102 of the bottom shell 1;

[0062] To fix the relay 7 , nuts can be integrated on the bottom shell 1 , and then the legs 71 are connected in series with bolts and threadedly matched with the nuts to fix the relay 7 .

[0063] Specifically, among the four legs 71 , three legs 71 have the same width, and another leg 71 has a width greater than or less than the three legs 71 with the same width;

[0064] As in the above structure, the sizes of the legs 71 are different, three of which have the same width, while the other one is different. At the same time, the groove 102 of the bottom shell 1 is arranged in the shape of the relay 7 and the legs 71, so that the error-proofing function can be achieved to avoid the relay 7 from being installed upside down.

[0065] like Fig.10 and Fig.11 As shown, the Hall sensor 8 is arranged in the bottom shell 1, and the Hall sensor 8 is connected to the relay 7 through a wiring harness; the interface between the wiring harness and the relay 7 is located on a leg 71 with a different width from the other three legs 71;

[0066] As shown in the above structure, among the legs 71 of the relay 7, the width of one leg 71 is different from that of the other legs, and the leg 71 is integrated with an interface for plugging the wiring harness, so that it is convenient to distinguish the shape of the relay 7 during assembly, and the convenience of installing the relay 7 into the base is improved; wherein the Hall sensor 8 is used for current detection;

[0067] Furthermore, the pre-charging resistor 9 and the smart fuse 10 are arranged in the bottom shell 1, wherein the pre-charging resistor 9 is electrically connected to the relay 7 and the smart fuse 10; the smart fuse 10 is electrically connected to the relay 7; the relay 7 includes a main negative relay, a main positive relay and a pre-charging relay;

[0068] As shown in the above structure, the pre-charging resistor 9 and the relays 7 constitute a positive circuit, a negative circuit and a pre-charging circuit, and the intelligent fuse 10 is used for circuit insurance to provide a higher level of protection than traditional fuses.

[0069] Specific implementation steps:

[0070] Assemble electrical components such as the relay 7, the Hall sensor 8, the pre-charge resistor 9 and the smart fuse 10 into the bottom shell 1 and fix them with bolts or other means, then electrically connect the electrical components, then assemble the top shell 2 onto the bottom shell 1, and finally assemble the cover plate 3 into the first slot 101 and the second slot 201; when the battery system needs to be connected, open the cover plate 3, and connect the connecting harness of the battery system to the electrical components in the bottom shell 1, and then reinstall the cover plate 3.

[0071] 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 BDU base, characterized in that: It comprises a bottom shell (1), a top shell (2), a cover plate (3) and a limiting plate (4), wherein: One side of the bottom shell (1) is provided with an opening, and the edge of the opening of the bottom shell (1) is provided with a first slot (101); The top shell (2) seals the opening of the bottom shell (1), and the top shell (2) is provided with a second card slot (201) corresponding to the first card slot (101); The cover plate (3) is inserted into the first card slot (101) and the second card slot (201); The limiting plate (4) is arranged on one end of the cover plate (3) plugged into the second slot (201), and the limiting plate (4) is perpendicular to the surface of the cover plate (3).

2. The BDU base according to claim 1, characterized in that: The top shell (2) has a first edge (202) away from the first card slot (101), and the first edge (202) is provided with two limiting plates (21); The two limiting plates (21) are parallel to each other, the limiting plate (21) has a side edge facing the second clamping groove (201), and a baffle (22) is provided at an end of the limiting plate (21) away from the first edge (202), and the baffle (22) is parallel to the first edge (202); The cover plate (3) is inserted into the gap between the baffle plate (22) and the first edge (202).

3. The BDU base according to claim 2, characterized in that: It also comprises a latch tongue (5), which is an elastic member, one end of which is connected to the cover plate (3), and the other end of which abuts against the top shell (2).

4. The BDU base according to claim 3, characterized in that: The cover plate (3) is a shell-shaped structure, and one side edge of the cover plate (3) is inserted into the gap between the baffle plate (22) and the first edge (202).

5. The BDU base according to claim 4, characterized in that: It also includes a reinforcing plate (6), which is arranged on the inner side of the cover plate (3), and the reinforcing plate (6) is parallel to the side of the cover plate (3) plugged into the top shell (2); The latch tongue (5) is connected to the reinforcing plate (6).

6. A battery pack BDU assembly, characterized in that: It comprises the BDU base as described in any one of claims 1 to 5.

7. The battery pack BDU assembly according to claim 6, characterized in that: It also comprises a relay (7), wherein the side of the relay (7) is provided with four legs (71), and the four legs (71) are arranged in a rectangular array; An H-shaped embedding groove (102) is provided inside the bottom shell (1), and the relay (7) and the support leg (71) are engaged in the embedding groove (102).

8. The battery pack BDU assembly according to claim 7, characterized in that: Among the four supporting feet (71), three of the supporting feet (71) have the same width, and the width of another supporting foot (71) is greater than or less than the width of the three supporting feet (71) having the same width.

9. The battery pack BDU assembly according to claim 8, characterized in that: It also includes a Hall sensor (8), the Hall sensor (8) is arranged in the bottom shell (1), and the Hall sensor (8) is connected to the relay (7) via a wiring harness; The interface between the wiring harness and the relay (7) is located on the support leg (71) having a different width from the other three support legs (71).

10. The battery pack BDU assembly according to claim 8, characterized in that: It also includes a pre-charging resistor (9) and an intelligent fuse (10), wherein the pre-charging resistor (9) and the intelligent fuse (10) are arranged in the bottom shell (1), wherein: The pre-charging resistor (9) is electrically connected to the relay (7) and the smart fuse (10); The smart fuse (10) is electrically connected to the relay (7); The relay (7) comprises a main negative relay, a main positive relay and a pre-charge relay.

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