CN220720821U - BDU module structure - Google Patents

Abstract

The utility model relates to a BDU module structure which comprises a BDU upper cover, a BDU base, a current sensor, a bus copper bar, a fuse, a BMS main board and an anode relay. Because the layout of the electronic components, the low-voltage wire harness and the high-voltage wire harness in the prior BDU controller is unreasonable, the size of the BDU controller is larger, and the later maintenance is inconvenient, the utility model is designed and researched to obtain the BDU module structure which has smaller overall structure size and lighter weight and is more convenient to install and arrange, so that the connection of the bus copper bar and the wiring terminal is more convenient, the wiring is simpler, and the unnecessary wiring is reduced to enable the layout of the electronic components in the BDU to be more compact and the maintenance to be convenient.

Description

BDU module structure

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a BDU module structure.

Background

The lithium battery pack is used as an energy battery with high reaction efficiency, strong safety and small volume, and is increasingly widely used. The battery power distribution unit (Battery Distribution Unit, BDU for short) is used as a device for switching on and switching off high-voltage power batteries of the new energy automobile, plays a vital role in the safety of a battery pack, is a relatively key part on the new energy automobile, and has important influences on the service life of the whole automobile, the control strategy and the safety of the high-voltage power batteries.

At present, the layout of electronic components, low-voltage wire harnesses and high-voltage wire harnesses in the prior BDU controller is unreasonable, so that the BDU controller is large in size and inconvenient to maintain in the later period.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model aims to provide a BDU module structure, which adopts the following technical scheme:

a BDU module structure. The device is characterized by comprising a BDU upper cover, a BDU base, a current sensor, a bus copper bar, a fuse, a BMS main board and an anode relay, wherein the BDU base is fixedly provided with a first bus copper bar, a pre-charging relay, the BMS main board and the anode relay which are matched with the current sensor in sequence from left to right; the current sensor is provided with a first fixing bracket for fixing the current sensor on the BDU base; the BMS main board is provided with a pre-charging resistor; the two ends of the fuse are respectively and electrically connected with the first bus bar and the second bus bar, wherein the other end of the second bus bar is also electrically connected with the positive relay; connecting terminals are arranged at two ends of the pre-charging resistor and are respectively electrically connected with the pre-charging relay and the positive relay through the connecting terminals; the second bus copper bar is also electrically connected with the pre-charging relay through a connecting terminal so as to ensure that the pre-charging resistor and the pre-charging relay form a pre-charging loop to be connected with the positive relay in parallel.

Preferably, two ends of the fuse are respectively connected with the first bus copper bar and the second bus copper bar.

Preferably, the BDU upper cover and the BDU base are mutually assembled through buckling position matching and threaded fastening, the BDU upper cover is formed with buckling positions and screw holes, and the BDU base is formed with a fixed guide post with an inverted buckle and an inner tooth threaded through hole in an alignment mode.

Preferably, the BMS motherboard is configured with a second fixing bracket for vertical fixing assembly.

Preferably, the base is integrally provided with an auxiliary mounting plate for positioning and assembling the fuse and a cavity for limiting and assembling the positive relay.

Preferably, the BDU upper cover is provided with a plurality of holes with different sizes for exposing the module ports on the first busbar, the current sensor, the BMS main board and the positive relay, so as to be connected with other electronic components or equipment through wires.

Preferably, the BDU base is in an arch bridge shape design, so that the fuse installed in the middle of the BDU base can be assembled with the first bus copper bar and the second bus copper bar under the same height.

Compared with the prior art, the utility model has the advantages that: under the condition of accommodating electric elements with the same specification, the BDU base is smaller in size, lighter in weight and more convenient to install and arrange, and the first bus bar, the pre-charging relay, the BMS main board and the positive relay which are matched with the current sensor are orderly and regularly installed from left to right, wherein the current sensor is fixedly assembled by the first fixing support, the BMS main board is vertically assembled by the second fixing support, and the BDU base provided with all parts is in an arch bridge shape design.

Drawings

FIG. 1 is an exploded view of the present utility model;

FIGS. 2 and 3 are partial assembly schematic views of the present utility model;

FIG. 4 is a schematic view of the BDU seat of the utility model;

fig. 5 is a schematic structural view of the BDU cover according to the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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.

As shown in fig. 1 to 5, the utility model is a BDU module structure, which mainly comprises a BDU upper cover (1), a BDU base (2), and a current sensor (3), a bus copper bar, a fuse (5), a BMS main board (7) and a positive relay (9) which are arranged on the BDU upper cover (1).

BDU upper cover (1) and BDU base (2) are mutually assembled through detaining position cooperation and screw fastening, specifically BDU upper cover (1) shaping has detaining position (100) and screw (101), and BDU base (2) then counterpoint shaping with it have back-off (102) and set up fixed guide pillar (103) of interior tooth screw through-hole to constitute complete casing and to carry out the protection to a certain extent to inside electronic components, and simultaneously a plurality of different sizes's hole sites are offered to upper cover (1) rule and are supplied first busbar copper (4), current sensor (3), precharge and hinder (11), BMS mainboard (7) and positive relay (9) on the module port expose, in order to be connected with other electronic components or equipment through the wire.

A first busbar copper bar (4), a pre-charging relay (6), a BMS main board (7) and a positive relay (9) which are matched with a current sensor (3) are fixedly arranged on the BDU base (2) in sequence from left to right; the current sensor (3) is provided with a first fixing bracket (30) for fixing the current sensor on the BDU base (2); the two ends of the fuse (5) are respectively and electrically connected with the first bus bar (4) and the second bus bar (10), wherein the other end of the second bus bar (10) is also electrically connected with the positive relay (9); connecting terminals (12) are arranged at two ends of the pre-charging resistor (11), and are respectively and electrically connected with the pre-charging relay (6) and the positive relay (9) through the connecting terminals (12); the second bus copper bar (10) is also electrically connected with the pre-charging relay (6) through a wiring terminal (12) so as to ensure that the pre-charging resistor (11) and the pre-charging relay (6) form a pre-charging loop to be connected with the positive electrode relay (9) in parallel. The fuse (5) arranged between the first bus copper bar (4) and the second bus copper bar (10) can be timely fused when short circuit and other conditions occur, so that the safety of other connected electronic components, equipment and users is protected, the safety is greatly improved, the pre-charging resistor (11) with similar functions can effectively protect a capacitor, a safety and a direct current contactor, the capacitor damage possibly caused by excessive instant current in the instant of direct power-on is prevented, or the condition of damaging switching devices such as the direct current contactor is prevented, the current limiting effect is achieved, and the multi-purpose power-consumption safety guarantee is provided for the utility model.

Under the condition of containing the same specification of electric elements, the utility model has smaller overall structure size and lighter weight, and is more convenient for installation and arrangement, the BDU base (2) is designed in an arch bridge shape, an auxiliary installing plate (104) and a cavity groove (105) are integrally formed, a first bus copper bar (4), a pre-charging relay (6), a BMS main board (7) and a positive relay (9) which are matched with a current sensor (3) are orderly and regularly installed from left to right, wherein the current sensor (3) is additionally provided with a first fixing bracket (30) for fixing and assembling, the BMS main board (7) is configured with a second fixing bracket (8) for vertical assembling, compared with the vertical assembling, the vertical assembling is tiled arrangement, the whole size of the utility model is greatly reduced, and a fuse wire (5) installed in the middle of the BDU base (2) can be assembled with the first bus copper bar (4) and the second bus copper bar (10) in a connecting mode under the same height, so that wiring lines of the utility model are more compact and wiring lines of the utility model are more convenient for wiring and wiring lines of wiring devices are more compact, wiring lines of the utility model are more convenient to reduce, wiring lines of wiring devices are more difficult to be required to be more convenient to repair and wiring lines. In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify 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 therefore 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 a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, the description with reference to the terms "one aspect," "some aspects," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the aspect or example is included in at least one aspect or example of the present utility model. In this specification, the schematic representations of the above terms are not necessarily for the same scheme or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more aspects or examples.

Claims (7)

1. The BDU module structure is characterized by comprising a BDU upper cover (1), a BDU base (2), a current sensor (3), a bus copper bar, a fuse (5), a BMS main board (7) and a positive relay (9), wherein a first bus copper bar (4), a pre-charging relay (6), a pre-charging resistor (11), the BMS main board (7) and the positive relay (9) which are matched with the current sensor (3) are fixedly arranged on the BDU base (2) from left to right in sequence; the current sensor (3) is provided with a first fixing bracket (30) for fixing the current sensor on the BDU base (2); the two ends of the fuse wire (5) are respectively and electrically connected with the first bus copper bar (4) and the second bus copper bar (10), wherein the other end of the second bus copper bar (10) is also electrically connected with the positive relay (9); connecting terminals (12) are arranged at two ends of the pre-charging resistor (11), and are respectively and electrically connected with the pre-charging relay (6) and the positive relay (9) through the connecting terminals (12); the second bus copper bar (10) is also electrically connected with the pre-charging relay (6) through a wiring terminal (12) so as to ensure that the pre-charging resistor (11) and the pre-charging relay (6) form a pre-charging loop to be connected with the positive electrode relay (9) in parallel.

2. A BDU module structure according to claim 1 characterized in that the two ends of the fuse (5) are connected to the first busbar (4) and the second busbar (10) respectively.

3. A BDU module structure according to claim 1, characterized in that, the BDU upper cover (1) and the BDU base (2) are assembled with each other through the engagement and the screw fastening, the BDU upper cover (1) is formed with an engagement (100) and a screw hole (101), and the BDU base (2) is formed with a back-off (102) and a fixing guide post (103) with an internal thread through hole in alignment.

4. A BDU module structure according to claim 1 characterized in that the BMS motherboard (7) is configured with a second fixing bracket (8) for vertical fixing assembly.

5. A BDU module structure according to claim 1, characterized in that, an auxiliary mounting plate (104) for positioning and assembling the fuse (5) and a cavity groove (105) for limiting and assembling the positive relay (9) are integrally formed on the base (2).

6. The BDU module structure according to claim 1, wherein the BDU upper cover (1) is provided with a plurality of holes with different sizes for exposing the module ports on the first bus bar copper (4), the current sensor (3), the BMS main board (7) and the positive relay (9) to be connected with other electronic components or equipment through wires.

7. A BDU module structure according to claim 1, characterized in that the BDU base (2) is designed in an arch bridge shape, so that the fuse (5) installed in the middle of the BDU base (2) can be assembled with the first bus bar (4) and the second bus bar (10) at the same height.