CN220106988U

CN220106988U - BDU device and battery system

Info

Publication number: CN220106988U
Application number: CN202321706773.2U
Authority: CN
Inventors: 王浩泽; 陈保国; 刘峰
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2023-11-28
Anticipated expiration: 2033-06-30

Abstract

The utility model discloses a BDU device and a battery system, and belongs to the technical field of battery structures. The BDU device comprises a shell and a copper bar, wherein an electric element is arranged in the shell, the shell is provided with an extension port, the copper bar penetrates through the shell through the extension port, the part of the copper bar positioned in the extension port is connected with the electric element, and the part of the copper bar positioned outside the shell is used for being connected with a circuit of a battery pack; the extension port is provided with an inner wall surface in a surrounding state, the inner wall surface of the extension port can circumferentially shield the part of the copper bar positioned in the extension port, the exposed area of the copper bar is reduced, and therefore, the insulation safety risk is reduced in the installation, subsequent use and maintenance processes.

Description

BDU device and battery system

Technical Field

The utility model relates to the technical field of battery structures, in particular to a BDU device and a battery system.

Background

The battery energy distribution unit (Battery energy Distribution Unit, BDU) is also called as a battery cut-off unit (Battery Disconnect Unit) and is an important accessory in a battery system of a new energy vehicle, and controls the charging and discharging processes of the electric vehicle.

Most of the prior BDU devices adopt copper bars for electric connection, and the copper bars are connected with various electric elements in a high-voltage loop. But there are also the following problems in this BDU device:

the copper bars are partially exposed and located outside the housing of the BDU device, resulting in a greater insulation safety risk during installation and subsequent use and maintenance.

Based on the foregoing, there is a need for a BDU device and a battery system that can solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a BDU device and a battery system, which can reduce insulation safety risks caused by exposed copper bars outside a BDU device shell.

To achieve the purpose, the utility model adopts the following technical scheme:

the BDU device comprises a shell and a copper bar, wherein an electric element is arranged in the shell, the shell is provided with an extension opening, the copper bar is arranged through the shell through the extension opening, the part of the copper bar positioned in the extension opening is connected with the electric element, and the part of the copper bar positioned outside the shell is used for being connected with a circuit of a battery pack; the extension opening has an inner wall surface in a closed state, and the inner wall surface of the extension opening can form circumferential shielding for the part of the copper bar located in the extension opening.

Optionally, the housing includes a top cover and a base, the base has an opening, the top cover is covered at the opening, a receiving cavity is defined between the top cover and the base, and:

the side wall of the opening is provided with a groove communicated with the accommodating cavity, and when the top cover is covered on the opening, the protruding opening is defined among the outer wall surface of the top cover, the bottom wall surface of the groove and the side wall surface of the groove;

and/or, the inner wall of the accommodating cavity is provided with an opening for communicating the inside and the outside of the shell, and the opening is configured as the extension port.

Optionally, the top cover is detachably connected with the base.

Optionally, the BDU device includes a first fixing bolt, and the top cover is detachably connected to the base through the first fixing bolt.

Optionally, an inner wall surface of the extension opening is provided with a mounting structure, and the copper bar is fixedly connected to the mounting structure.

Optionally, the mounting structure is a threaded hole, the BDU device further includes a second fixing bolt, and the copper bar is fixedly connected to the inner wall surface of the outlet through the second fixing bolt.

Optionally, the housing has at least two outlets.

Optionally, at least two of the above-mentioned outlets are arranged along different axial directions.

Optionally, the base is mounted at a beam of the battery pack, and the base is provided with a step structure corresponding to the beam, so that the base is attached to the battery pack.

The battery system comprises a battery pack and the BDU device, wherein the BDU device is electrically connected with the battery pack.

The BDU device and the battery system provided by the utility model have the beneficial effects that: the casing has the stretch out the mouth, and the copper bar passes the casing setting through stretching out the mouth, stretches out the mouth and has the internal face that is the state of enclosing, forms circumference through the part that is located the stretch out the mouth of this internal face copper bar and shelters from, has reduced the naked area of copper bar to in installation and follow-up use, maintenance process, reduced insulating security risk.

Drawings

Fig. 1 is a perspective view of a BDU device provided by the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a top view of a BDU device provided by the present utility model;

FIG. 4 is a front view of a BDU device provided by the present utility model;

fig. 5 is a right side view of a BDU device provided by the present utility model.

In the figure:

100. an outlet;

11. a top cover; 12. a base; 121. a step structure;

21. the battery system module inputs the total positive copper bar; 22. the battery system module inputs the total negative copper bar; 23. the battery system outputs a total positive copper bar; 24. the battery system outputs a total negative copper bar; 25. the battery system is fast charged with the total positive copper bar; 26. the battery system is quickly charged with the total negative copper bar;

3. an electrical component;

41. a first fixing bolt; 42. and a second fixing bolt.

Detailed Description

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The BDU device and the battery system provided by the present utility model are described below with reference to fig. 1 to 5.

As shown in fig. 1 to 4, in the present embodiment, the BDU device mainly includes a housing and a copper bar. Wherein, be provided with electric element 3 in the casing, the casing has and stretches out the mouth 100, and the copper bar passes the casing setting through stretching out the mouth 100, and the copper bar is located the part that stretches out the mouth 100 and is connected with electric element 3, and the copper bar is located the part that the casing is located outside and is used for being connected with the circuit of battery package to when appearing circuit abnormality, cut off the external output of battery package through electric element 3. And, the extension port 100 has an inner wall surface in a surrounding state, and the part of the inner wall facing the copper bar and positioned in the extension port 100 forms circumferential shielding, so that the exposed area of the copper bar is reduced, and the insulation safety risk is reduced in the process of installation and subsequent use and maintenance.

Illustratively, in the present embodiment, the housing includes a top cover 11 and a base 12, the base 12 has an opening, the top cover 11 is covered at the opening, a receiving cavity is defined between the top cover 11 and the base 12, and the electrical component 3 can be received in the receiving cavity. The open-ended lateral wall is provided with the recess that is linked together with holding the chamber, when the opening is located to top cap 11 lid, prescribes a limit to between the lateral wall face of top cap 11 outer wall face, recess's diapire face and recess and the recess and extend out the mouth 100, and the outer wall face of top cap 11, the diapire face of recess and the lateral wall face of recess enclose and close the inner wall face that forms out the mouth 100 to the part that passes the casing of copper bar forms along four directions about in figure 4 and shelter from, reduced insulating security risk.

Of course, in some other embodiments, an opening may be directly provided on the inner wall of the accommodating cavity, and the inside and the outside of the housing may be communicated through the opening, that is, the above-mentioned extension port 100 is formed, and the copper bar may also be enabled to communicate the electrical element 3 in the housing with the circuit of the battery pack through the opening.

With continued reference to fig. 2, in this embodiment, the inner wall surface of the extension port 100 is provided with a mounting structure, and the copper bar is fixedly mounted on the mounting structure, so that stability of the copper bar can be ensured, and the phenomenon that the end portion of the copper bar located outside the housing is easy to shake and move is avoided. And, because the mounting structure is located and stretches out the mouth 100, can also improve BDU device's space utilization, reduce copper bar and stretch out the length, dodge the total connectors such as input/output of battery package front end, satisfy battery system space demand.

Illustratively, in this embodiment, the mounting structure is a threaded hole, and the BDU device further includes a second fixing bolt 42, and the copper bar is fixedly connected to the inner wall surface of the extension port 100 by the second fixing bolt 42. In the present utility model, the copper bar may be an integral structure or may be formed by combining and connecting a plurality of split members, and when the copper bar adopts a plurality of split members, the second fixing bolt 42 may also have an effect of connecting two adjacent split members.

Alternatively, in the present embodiment, the top cover 11 and the base 12 of the housing are detachably connected, thereby further facilitating assembly of the BDU device. As illustrated in fig. 3 to 4, in the present embodiment, the BDU device includes a first fixing bolt 41, and the top cover 11 is detachably coupled with the base 12 by the first fixing bolt 41.

Specifically, when the BDU device is assembled, the electrical component 3 is first mounted at a predetermined position in the base 12, so that the connection end of the electrical component 3 is located in the above-mentioned groove, and then the copper bar is mounted and fixed by the second fixing bolt 42 and connected with the connection end of the electrical component 3. Finally, the top cover 11 is covered at the opening of the base 12, and the top cover 11 is connected with the base 12 through a connecting piece such as a bolt, so that the assembly can be completed, the risk of false contact and damage of the copper bar in the assembly process is reduced, and the safety in the installation, use and maintenance processes of the BDU device is improved.

When maintenance or disassembly is needed, the copper bar, the second fixing bolt 42 and the electric element 3 can be in an easy-maintenance or easy-disassembly state only by removing the top cover 11.

Referring to fig. 4, in this embodiment, the BDU device has at least two protruding ports 100. Specifically, the BDU device has 6 extension ports 100 for a battery system module input total positive copper bar 21, a battery system module input total negative copper bar 22, a battery system output total positive copper bar 23, a battery system output total negative copper bar 24, a battery system fast-charge total positive copper bar 25, and a battery system fast-charge total negative copper bar 26, respectively. The battery system module input total positive copper bar 21 and the battery system module input total negative copper bar 22 are used for connecting the battery modules in the battery pack with the BDU device, namely, the total positive electrode and the total negative electrode of the high-voltage circuit in the battery system. The battery system output total positive copper bar 23 and the battery system output total negative copper bar 24 are copper bars for connecting the BDU device with the battery pack in high-voltage plug connection, are responsible for high-voltage output and input of the battery pack, and can meet the requirements of discharging and slow charging of the battery pack. The battery system fast-charging total positive copper bar 25 and the battery system fast-charging total negative copper bar 26 are copper bars for BDU device connection battery pack fast-charging plug-in connection, are responsible for high-voltage input of the battery pack, and meet the battery pack fast-charging function. Optionally, as shown in fig. 4 and 5, at least two protruding ports 100 are disposed along different axial directions, so as to meet the connection requirements of different directions of the BDU device.

Preferably, as shown in fig. 4 and 5, in this embodiment, the base 12 is mounted at a beam of the battery pack through a bolt, and the base 12 is provided with a step structure 121 corresponding to the beam, so that the base 12 is attached to the battery pack, contact flatness between the BDU device and the beam and bottom surface of the battery pack is ensured, and mounting and fixing stability and running stability of the BDU device are ensured.

The utility model also provides a circuit system which comprises the battery pack and the BDU device, wherein the BDU device is electrically connected with the battery pack. The part of the inner wall of the extension port 100, which faces the copper bar and is positioned in the extension port 100, forms circumferential shielding, so that the exposed area of the copper bar is reduced, and the insulation safety risk is reduced in the installation, subsequent use and maintenance processes.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

BDU device, characterized by comprising a shell and a copper bar, wherein an electric element (3) is arranged in the shell, the shell is provided with an extension port (100), the copper bar is arranged through the shell through the extension port (100), the part of the copper bar positioned in the extension port (100) is connected with the electric element (3), and the part of the copper bar positioned outside the shell is used for being connected with a circuit of a battery pack; the extension opening (100) is provided with an inner wall surface in a surrounding state, and the inner wall surface of the extension opening (100) can form circumferential shielding for the part of the copper bar positioned in the extension opening (100).
2. A BDU set according to claim 1, wherein,

the casing includes top cap (11) and base (12), base (12) have the opening, top cap (11) lid is located the opening part, top cap (11) with it holds the chamber to inject between base (12), and:

the side wall of the opening is provided with a groove communicated with the accommodating cavity, and when the top cover (11) is covered on the opening, the protruding opening (100) is defined among the outer wall surface of the top cover (11), the bottom wall surface of the groove and the side wall surface of the groove;

and/or the inner wall of the accommodating cavity is provided with an opening communicated with the inside and the outside of the shell, and the opening is configured as the extension opening (100).
3. A BDU set according to claim 2, wherein,

the top cover (11) is detachably connected with the base (12).
4. A BDU set according to claim 3, wherein,

the BDU device comprises a first fixing bolt (41), and the top cover (11) is detachably connected with the base (12) through the first fixing bolt (41).
5. A BDU set according to claim 2, wherein,

the inner wall surface of the extension opening (100) is provided with a mounting structure, and the copper bar is fixedly connected to the mounting structure.
6. A BDU set according to claim 5, wherein,

the mounting structure is a threaded hole, the BDU device further comprises a second fixing bolt (42), and the copper bar is fixedly connected to the inner wall surface of the extension opening (100) through the second fixing bolt (42).
7. A BDU set according to claim 1, wherein,

the housing has at least two of the protruding openings (100).
8. A BDU set according to claim 7, wherein,

at least two of the protruding ports (100) are arranged in different axial directions.
9. A BDU set according to claim 2, wherein,

the base (12) is arranged at the beam of the battery pack, and the base (12) is provided with a step structure (121) corresponding to the beam, so that the base (12) is attached to the battery pack.
10. A battery system comprising a battery pack and a BDU device according to any one of claims 1-9, said BDU device being electrically connected to said battery pack.