BDU structure in battery box body

Abstract

The utility model discloses a BDU structure in a battery box body, which relates to the technical field of batteries, and comprises a base, an upper cover plate, a limiting column, a first switching copper bar, a main positive relay and a main negative relay, the upper cover plate is arranged at the upper end of the base and is connected with a bracket in a battery plate, and the main positive relay and the main negative relay are arranged at the upper end of the base; the main positive relay and the main negative relay are distributed at the two ends of the base, the main positive relay and the main negative relay are both provided with first switching copper bars, the upper end of the base protrudes upwards to form a plurality of protruding structures, each protruding structure is provided with a limiting column, and the first switching copper bars are installed on the protruding structures and limited through the limiting columns. The limiting columns are arranged on the convex structures, limiting of the switching copper bar is achieved, when the switching copper bar is installed through bolts, the switching copper bar cannot rotate along with the bolts, and rapid installation or disassembly of the switching copper bar is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a BDU structure in a battery box. Background Art

[0002] BDU (battery pack disconnect unit) is a battery protection module in the PDU (power distribution unit) of new energy vehicles. It is an important part of the overall control system of new energy vehicles. Its function is to coordinate the function conversion and energy distribution of high-voltage accessories such as the drive motor control system, battery management system, charging management system, electric air conditioning, and electric power steering.

[0003] The BDU structure in the prior art includes a shell having an installation cavity, a positive relay and a negative relay arranged in the installation cavity, and two pairs of input copper bars and output copper bars electrically connected to the positive relay and the negative relay respectively via fasteners; the two pairs of input copper bars and output copper bars extend along the length direction of the shell, and the input copper bars and / or the output copper bars have a convex section that convexly protrudes away from the relatively arranged positive relay or negative relay.

[0004] However, in the BDU structure of the prior art, the copper bar is installed by fasteners. When the fasteners are rotated, the copper bar is easily rotated with them, which makes the installation of the copper bar inconvenient. Utility Model Content

[0005] The purpose of the utility model is to provide a BDU structure in a battery box to solve the above technical problems.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A BDU structure in a battery box comprises a base, an upper cover, a limit column, a first transfer copper busbar, a main positive relay and a main negative relay, wherein the upper cover is mounted on the upper end of the base and connected to a bracket in a battery panel, the upper end of the base is provided with the main positive relay and the main negative relay, the main positive relay and the main negative relay are distributed at both ends of the base, the main positive relay and the main negative relay are both provided with the first transfer copper busbar, the upper end of the base protrudes upward to form a plurality of protruding structures, each of the protruding structures is respectively provided with the limit column, the first transfer copper busbar is mounted on the protruding structure and limited by the limit column.

[0008] Preferably, a wire passing groove is provided at the upper end of the base.

[0009] Preferably, a fast charging relay is further included, wherein the fast charging relay is arranged on one side of the main positive relay and connected to the main positive relay.

[0010] Preferably, it further includes a pre-charge resistor, a pre-charge relay, and a heating relay. The pre-charge resistor, the pre-charge relay, and the heating relay are sequentially arranged on the other side of the main positive relay in the direction close to the main negative relay.

[0011] As a further preference, it further includes a shunt. The shunt is provided on one side of the pre-charge relay and the heating relay.

[0012] As a further preference, it further includes a second adapter copper bar. The shunt is connected to the negative electrode of the battery pack through the second adapter copper bar.

[0013] As a further preference, it further includes a third adapter copper bar. The shunt is connected to the main negative relay through the third adapter copper bar.

[0014] As a further preference, it further includes a fourth adapter copper bar. The main positive relay is connected to the positive electrode of the battery pack through the fourth adapter copper bar.

[0015] As a further preference, the second adapter copper bar, the third adapter copper bar, and the fourth adapter copper bar are respectively installed on the convex structure and limited by the limit posts.

[0016] The above technical solution has the following advantages or beneficial effects:

[0017] (1) In the present utility model, by providing limit posts on the convex structure, the limit of the adapter copper bar is realized. When installing the adapter copper bar with bolts, the adapter copper bar will not rotate with the bolts, which is convenient for the quick installation or disassembly of the adapter copper bar.

[0018] (2) In the present utility model, by directly connecting the adapter copper bar to the external high-voltage fast charge plug, high-voltage slow charge plug, positive electrode of the battery pack, and negative electrode of the battery pack, the length of the adapter copper bar inside the BDU can be reduced, and the cost of BDU components can be reduced.

[0019] (3) In the present utility model, by opening a wire trough on the upper end of the base, the problem of difficult wire routing due to small space can be solved. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the BDU structure in the battery box of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the base of the present utility model;

[0022] Figure 3 is a schematic diagram of the circuit part of the present utility model.

[0023] In the figure: 1. Base; 2. Upper cover plate; 3. Limit post; 4. Main positive relay; 5. Main negative relay; 6. Protruding structure; 7. Wire trough; 8. Fast charging relay; 9. Pre-charge resistor; 10. Pre-charge relay; 11. Heating relay; 12. Shunt; 13. Positive pole of battery pack; 14. Negative pole of battery pack; 15. High-voltage fast charging plug; 16. High-voltage slow charging plug; 17. Heating fuse. Detailed implementation manner

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] In the description of the present utility model, it should be noted that when terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 should not be construed as a limitation of the present utility model. In addition, when terms such as "first", "second", "third" appear, they are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, when terms such as "installation", "connection", "connection" appear, they 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] Figure 1 It is a schematic structural diagram of the BDU structure in the battery box of the present utility model; Figure 2 It is a schematic structural diagram of the base of the present utility model; Figure 3 It is a schematic diagram of the circuit part of the present utility model. Please refer to Figures 1 to 3As shown, a preferred embodiment is shown, which is a BDU structure inside a battery box, including a base 1, an upper cover plate 2, a limit post 3, a first transfer copper bar, a main positive relay 4, and a main negative relay 5. The upper cover plate 2 is installed at the upper end of the base 1 and connected to the inner bracket of the battery plate. The main positive relay 4 and the main negative relay 5 are arranged at the upper end of the base 1, and the main positive relay 4 and the main negative relay 5 are distributed at both ends of the base 1. First transfer copper bars are arranged on both the main positive relay 4 and the main negative relay 5. A number of convex structures 6 are formed by upward protrusions at the upper end of the base 1, and a limit post 3 is respectively arranged on each convex structure 6. The first transfer copper bar is installed on the convex structure 6 and limited by the limit post 3. In this embodiment, the BDU structure is used to be installed inside the battery pack. The upper cover plate 2 and the base 1 are connected by bolts, and then the upper cover plate 2 is separately installed on the inner bracket of the battery plate inside the battery pack, which can solve the problem of small space layout. The main positive relay 4 and the main negative relay 5 are also respectively fixed on the base 1 by bolts. The convex structure 6 and the base 1 are integrally formed. The limit post 3 arranged at the upper end of the convex structure 6 is used to cooperate with the limit holes on the transfer copper bar (which can be all the transfer copper bars or some of the transfer copper bars inside the BDU), and then the transfer copper bar is connected and fixed to the convex structure 6 by bolts. When installing the transfer copper bar by bolts, due to the setting of the limit post 3, the rotation of the transfer copper bar is restricted. When turning the bolt, the transfer copper bar will not rotate accordingly, which is convenient for the quick installation or disassembly of the transfer copper bar.

[0028] Further, as a preferred implementation manner, a wire groove 7 is opened at the upper end of the base 1. In this embodiment of the BDU structure, some of the electrical components inside are connected by wires, and the provided wire groove 7 is used for wire routing to avoid the problem that wire routing cannot be carried out due to the small internal space of the BDU structure. Among them, as shown in Figure 2 As shown, the wire groove 7 is distributed along the length direction of the base 1 and is opened from one end of the base 1 to the other end.

[0029] Further, as a preferred implementation manner, it further includes a fast charge relay 8, and the fast charge relay 8 is arranged on one side of the main positive relay 4 and connected to the main positive relay 4. As shown in Figure 1 As shown, the fast charge relay 8 is installed on the left side of the main positive relay 4 and is arranged close to one end of the base 1. The position of the main negative relay 5 is arranged close to the other end of the base 1.

[0030] Further, as a preferred embodiment, it further includes a pre-charge resistor 9, a pre-charge relay 10, and a heating relay 11. On the other side of the main positive relay 4, in the direction close to the main negative relay 5, there are sequentially arranged a pre-charge resistor 9, a pre-charge relay 10, and a heating relay 11. On one side of the heating relay 11, there is a heating fuse 17. In this embodiment, the pre-charge resistor 9, the pre-charge relay 10, the heating relay 11, and the fast charge relay 8 are respectively fixed to the base 1 by bolt connections. And part of the convex structure 6 is arranged between the main positive relay 4 and the pre-charge resistor 9 for supporting the transfer copper bar. Among them, the position and quantity of the convex structure 6 can be set as required.

[0031] Further, as a preferred embodiment, it further includes a shunt 12. A shunt 12 is arranged on one side of the pre-charge relay 10 and the heating relay 11. In this embodiment, the shunt 12 is connected to the negative electrode 14 of the battery pack through a second transfer copper bar, and the shunt 12 is connected to the main negative relay 5 through a third transfer copper bar. The main positive relay 4 is connected to the positive electrode 13 of the battery pack through a fourth transfer copper bar. The second transfer copper bar, the third transfer copper bar, and the fourth transfer copper bar are respectively installed on the convex structure 6 and limited by the limit posts 3. Among them, the shunt 12 is fixed to the base 1 by bolt connection.

[0032] In this embodiment, when in use, after installing the BDU structure at the designated position inside the battery pack, the fast charge relay 8, the main positive relay 4, and the main negative relay 5 inside the BDU structure are respectively electrically connected to the corresponding positive electrode 13 of the battery pack, the negative electrode 14 of the battery pack, and the high-voltage fast charge plug 15, the high-voltage slow charge plug 16, and the high-voltage discharge plug on the battery pack box body, so as to realize the charging and discharging functions of the battery pack.

[0033] Among them, the circuit connection relationships among the electrical components such as the main positive relay 4, the main negative relay 5, the fast charge relay 8, the pre-charge resistor 9, the pre-charge relay 10, the heating relay 11, the heating fuse 17, and the shunt 12 inside the BDU structure are all prior arts, and no specific limitations will be made here. For the specific circuit relationships, reference can be made to Figure 3 as shown in. In this embodiment, only the distribution method of the electrical components inside the BDU structure, the limiting method of the transfer copper bar, and the structure of the base 1 of the BDU structure are improved.

[0034] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be able to realize that all the equivalent replacements and obvious changes made by using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A BDU structure inside a battery box, characterized in that, It includes a base, an upper cover plate, a limit post, a first transfer copper bar, a main positive relay, and a main negative relay. The upper cover plate is installed at the upper end of the base and connected to the inner bracket of the battery panel. The main positive relay and the main negative relay are arranged at the upper end of the base, and the main positive relay and the main negative relay are distributed at both ends of the base. The first transfer copper bar is arranged on both the main positive relay and the main negative relay. The upper end of the base protrudes upward to form a plurality of protruding structures, and each protruding structure is respectively provided with a limit post. The first transfer copper bar is installed on the protruding structure and limited by the limit post.

2. The BDU structure in the battery box according to claim 1, characterized in that, A wire groove is provided at the upper end of the base.

3. The BDU structure in the battery box according to claim 1, characterized in that, It further includes a fast charge relay, which is arranged on one side of the main positive relay and connected to the main positive relay.

4. The BDU structure in the battery box according to claim 1, characterized in that, It further includes a pre-charge resistor, a pre-charge relay, and a heating relay. The pre-charge resistor, the pre-charge relay, and the heating relay are sequentially arranged on the other side of the main positive relay in the direction close to the main negative relay.

5. The BDU structure in the battery box according to claim 4, characterized in that, It further includes a shunt, and the shunt is arranged on one side of the pre-charge relay and the heating relay.

6. The BDU structure in the battery box according to claim 5, characterized in that, It further includes a second transfer copper bar, and the shunt is connected to the negative electrode of the battery pack through the second transfer copper bar.

7. The BDU structure in the battery box according to claim 6, characterized in that, It further includes a third transfer copper bar, and the shunt is connected to the main negative relay through the third transfer copper bar.

8. The BDU structure in the battery box according to claim 7, characterized in that, It further includes a fourth transfer copper bar, and the main positive relay is connected to the positive electrode of the battery pack through the fourth transfer copper bar.

9. The BDU structure in the battery box according to claim 8, characterized in that, The second transfer copper bar, the third transfer copper bar, and the fourth transfer copper bar are respectively installed on the protruding structure and limited by the limit post.

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