CN215299521U

CN215299521U - Connecting assembly for high-voltage component of battery power distribution integrated system and electric automobile

Info

Publication number: CN215299521U
Application number: CN202122825207.0U
Authority: CN
Inventors: 杜朝晖; 许峰; 邵仁强; 严祖冬
Original assignee: Wuhan Jiachen Electronic Technology Co ltd
Current assignee: Wuhan Jiachen Electronic Technology Co ltd
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2021-12-24
Anticipated expiration: 2031-11-18

Abstract

The utility model provides a coupling assembling and electric automobile of battery distribution integrated system high-voltage component, the screw from the bottom up passes lower bush and with upper liner threaded connection, compare in the prior art the mode that the screw fastens the connection from the top down, during the actual installation, the screw can not form the extrusion to the contactor, when the distance between lower bush and the upper liner is too big, can reduce the pulling of screw to contactor installation foot after the installation, consequently can reduce the installation stress between copper bar and the contactor; the distance between the lower end face of the upper bushing of the contactor and the mounting faces of the fixed contact and the copper bar of the contactor is designed by zero or negative manufacturing tolerance, so that a small-range gap is formed between the lower end face of the upper bushing and the upper end face of the lower bushing, and the condition that the contactor and the base are extruded mutually due to overhigh distance can be prevented; through above mode combined action, just can avoid copper bar and the installation of contactor to accomplish the back and drag each other or the condition of extrusion firmly.

Description

Connecting assembly for high-voltage component of battery power distribution integrated system and electric automobile

Technical Field

The utility model relates to a battery distribution integrated system technical field especially relates to a coupling assembling and electric automobile of battery distribution integrated system high-pressure component.

Background

A battery distribution integrated system (BDU) is a core component of an electric vehicle, and generally includes high-voltage components such as fuses, current sensors, contactors, and the like, and the connection between these high-voltage components is often realized by copper bars, and the size of the copper bars is defined according to the current-carrying capacity of the system. For the battery power distribution integrated system for the current electric automobile, the current-carrying capacity is always larger, so the size of the copper bar is also larger, and the thickness of the copper bar is 3mm, which is the thickness commonly used. Although copper is softer, it also has great strength for a 3mm thick copper bar.

Fig. 1 shows a connection mode between a copper bar and a contactor at present, which includes the following steps:

a1, taking a battery distribution integrated system base;

a2, taking a contactor and a screw;

a3, fixedly installing the contactor on a base of the battery power distribution integrated system through screws, wherein the installation torsion is generally about 3.5 N.m;

a4, taking a copper bar and a screw;

a5, fixedly mounting the copper bar on a static contact of a contactor through a screw, wherein the mounting torsion is about 7.5 N.m generally;

a6, until all components are mounted to the battery distribution integration system base.

Installation mode more than adopting, under the condition of locking through the screw in advance at the installation foot of contactor, because the mounting height of contactor has great manufacturing tolerance (+/-0.5 mm), and battery distribution integrated system base, the manufacturing tolerance of copper bar and other high voltage components, in the installation of copper bar, the contactor upwards withstands copper bar or contactor pull the copper bar downwards in the inevitable can appear, there is very big stress between copper bar and the contactor such installation will be caused, the risk that this kind of stress exists, will carry out lasting pulling or hard extrusion to the contactor, more serious situation is that the packaging structure of contactor is crushed or the contactor static contact is extracted, thereby cause the inefficacy of contactor internal seal, serious situation in advance, cause the fracture of contactor seal shell even.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a coupling assembling and electric automobile of battery distribution integrated system high-voltage component can avoid there being great stress in the installation between copper bar and the contactor.

The technical scheme of the utility model is realized like this:

on one hand, the utility model provides a connecting component of a high-voltage component of a battery power distribution integrated system, which comprises a base, a contactor, a copper bar and a plurality of screws, wherein the copper bar is fastened and connected with the contactor and other high-voltage components in the battery power distribution integrated system through the screws; the base comprises a base body and a lower bushing, and the lower bushing is fixed on the base body and penetrates through the base body; the contactor comprises a mounting pin and an upper bushing, and the upper bushing is fixed on the mounting pin and penetrates through the mounting pin; the inner wall of the upper bushing is provided with threads, the inner wall of the lower bushing is smooth, the screw penetrates through the lower bushing from bottom to top and is in threaded connection with the upper bushing, and the inner side face of the screw cap of the screw is abutted to the lower bushing.

On the basis of the technical scheme, preferably, the end face of the bottom of the lower bushing is provided with a sunken locking face, and the inner side face of the screw cap of the screw is abutted to the locking face.

Further preferably, an annular groove is formed in the middle of the lower bushing, anti-slip grains are arranged on the upper side and the lower side of the annular groove respectively, and the lower bushing and the base body are integrally injection molded.

On the basis of the technical scheme, preferably, the fixed contact and the copper bar of the contactor are mutually abutted and fixedly connected, and a gap of 0-1 mm is arranged between the lower end face of the upper bushing and the upper end face of the lower bushing.

Further preferably, a manufacturing tolerance X of a distance between the lower end surface of the upper bushing of the contactor and the mounting surfaces of the fixed contact and the copper bar of the contactor is 0 or a negative value.

Still more preferably, -1 mm. ltoreq. X.ltoreq.0 mm.

In a second aspect, the present invention provides an electric vehicle, comprising the first aspect of the present invention, a connecting assembly for a high voltage component of a battery power distribution integrated system.

The utility model discloses a coupling assembling and electric automobile of battery distribution integrated system high-pressure component have following beneficial effect for prior art:

(1) the inner wall of the upper bushing is provided with the threads, the inner wall of the lower bushing is smooth, and the screw penetrates through the lower bushing from top to bottom and is in threaded connection with the upper bushing;

(2) the distance between the lower end face of the upper bushing of the contactor and the installation faces of the fixed contact and the copper bar of the contactor is designed by zero or negative manufacturing tolerance, so that a small-range gap is formed between the lower end face of the upper bushing and the upper end face of the lower bushing, and the condition that the contactor and the base are extruded mutually due to overhigh distance can be prevented;

(3) through the combined action of the above modes, the situation that the copper bar and the contactor are mutually pulled or extruded hard after being installed can be avoided;

(4) the utility model discloses a coupling assembling of battery distribution integrated system high-voltage component is particularly useful for this kind of device that requires harsher and need too big electric current on the copper bar to the vibration condition of electric automobile.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a flow chart of an installation of a prior art integrated battery power distribution system;

fig. 2 is a perspective view of the battery distribution integration system of the present invention;

fig. 3 is a partial structural sectional view of the connection assembly of the battery distribution integration system of the present invention;

fig. 4 is a perspective view of the lower bushing of the present invention;

fig. 5 is a front sectional view of the lower bushing of the present invention;

fig. 6 is an installation flowchart of the battery power distribution integrated system of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

As shown in fig. 2-5, the utility model discloses a coupling assembling of battery distribution integrated system high-voltage component, including base 1, contactor 2, copper bar 3, a plurality of screw 4 and other high-voltage component (not sign in the figure).

Wherein, base 1, generally adopt injection moulding spare, plays fixed and the effect of support. Specifically, the base 1 includes a base body 11 and a lower bushing 12, and the lower bushing 12 is fixed on the base body 11 and penetrates through the base body 11. In order to prevent the lower bushing 12 from moving in the base body 11, a ring groove 122 is formed in the middle of the lower bushing 12, anti-slip patterns 123 are respectively arranged on the upper side and the lower side of the ring groove 122, and the lower bushing 12 and the base body 11 are integrally formed through injection molding.

Contactor 2, for prior art, its surface is provided with the static contact, and the static contact supports each other and holds and fastening connection through screw 4 and copper bar 3, realizes electric connection simultaneously. Specifically, as a portion of the contact 2 externally connected to the base 1, the contact 2 includes a mounting leg 21 and an upper bushing 22, and the upper bushing 22 is fixed on the mounting leg 21 and penetrates through the mounting leg 21. Similarly, the mounting foot 21 and the upper bushing 22 may be integrally molded by injection molding.

Copper bar 3, pass through screw 4 fastening connection with contactor 2 and other high voltage component in the battery distribution integrated system and realize electric connection simultaneously.

Specifically, as the key improvement part of the utility model, the connection mode of contactor 2 and base 1 is as follows:

the inner wall of the upper bushing 22 is provided with threads, the inner wall of the lower bushing 12 is smooth, the screw 4 penetrates through the lower bushing 12 from bottom to top and is in threaded connection with the upper bushing 22, and the inner side face of the nut of the screw 4 is abutted to the lower bushing 12.

So, when fastening connection contactor 2 and base 1, screw 4 from supreme lower bush 12 of passing and with last bush 22 threaded connection down, compare in prior art screw 4 from last to carrying out fastening connection's mode down, when actual installation, screw 4 can not form the extrusion to contactor 2, when the distance between lower bush 12 and the last bush 22 is too big, can reduce the installation and accomplish dragging of back screw 4 to installation foot 21, consequently can avoid there being great stress in the installation between copper bar 3 and the contactor 2.

Specifically, after the installation is completed, a certain gap may exist between the lower end surface of the upper bushing 22 and the upper end surface of the lower bushing 22, so as to adapt to manufacturing and installation tolerances, and to ensure the locking contactor 2. As a preferred embodiment, the fixed contact of the contactor 2 and the copper bar 3 are mutually abutted and fixedly connected, and a gap of 0-1 mm is arranged between the lower end face of the upper bushing 22 and the upper end face of the lower bushing 12. So, earlier through fixed with the static contact of contactor 2 and copper bar 3, when fastening connection upper liner 22 and lower liner 12 again, just can reserve out 0~1 mm's clearance.

In a preferred embodiment, a concave locking surface 121 is formed on the bottom end surface of the lower bushing 12, and the nut inner side surface of the screw 4 abuts against the locking surface 121.

Above mounting structure can avoid because under the upper liner 22 between terminal surface and the lower liner 12 up end apart from too big and the copper bar 3 that leads to and contactor 2 between the situation of dragging each other, if under the upper liner 22 between terminal surface and the lower liner 12 up end apart from not enough, the extruded situation of each other hard between copper bar 3 and the contactor 2 can appear, to this kind of situation, the utility model discloses an preferred embodiment is injectd through the manufacturing tolerance to contactor 2 and solves. Specifically, the manufacturing tolerance X of the distance between the lower end face of the upper bushing 22 of the contactor 2 and the mounting surfaces of the fixed contact and the copper bar 3 of the contactor 2 is zero or a negative value. As a preferred embodiment, -1 mm. ltoreq. X.ltoreq.0 mm. So, adopt the contactor 2 of negative tolerance design, avoid appearing because under the upper liner 22 between terminal surface and the lower liner 12 up end apart from not enough and the copper bar 3 that leads to and the condition of mutual extrusion between the contactor 2.

The utility model discloses a coupling assembling of battery distribution integrated system high-voltage component is particularly useful for this kind of device that requires harsher and need too big electric current on the copper bar to the vibration condition of electric automobile.

The following introduces the utility model discloses an installation procedure of battery distribution integrated system high pressure part, as shown in fig. 6, includes following step:

s1, taking a battery distribution integrated system base 1;

s2, taking the contactor 2;

s3, pre-placing the contactor 2 on the base 1;

s4, taking the copper bar 3 and the screw 4;

s5, fixedly mounting the copper bar 3 on a static contact of the contactor 2 through a screw 4, wherein the mounting torsion is about 7.5 N.m generally;

s6, mounting all high-voltage components except the contactor 2 on the base 1 through screws 4, and connecting and fastening all the high-voltage components through copper bars 3;

s7, taking the screw 4, penetrating the lower bushing 12 from bottom to top and aligning with the upper bushing 22;

s8, the screw 4 is twisted, and the installation torsion may take a large value, such as 3.5N · m, so that the contactor 2 has a large locking force.

Install other high-voltage components except contactor 2 earlier fixedly, connect through copper bar 3 at last and fasten all high-voltage components, fix contactor 2 and base 1 again at last, can unify the manufacturing tolerance and the installation tolerance of other high-voltage components and collect as the distance difference between terminal surface under upper liner 22 and the terminal surface under lower liner 12, then rectify through supreme mounting screw 4 down, avoid having great stress between copper bar 3 and the contactor 2.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A connecting assembly for high-voltage components of a battery power distribution integrated system comprises a base (1), a contactor (2), a copper bar (3) and a plurality of screws (4), wherein the copper bar (3) is fixedly connected with the contactor (2) and other high-voltage components in the battery power distribution integrated system through the screws (4); the base (1) comprises a base body (11) and a lower bushing (12), wherein the lower bushing (12) is fixed on the base body (11) and penetrates through the base body (11); the contactor (2) comprises a mounting foot (21) and an upper bushing (22), wherein the upper bushing (22) is fixed on the mounting foot (21) and penetrates through the mounting foot (21); the method is characterized in that: the inner wall of the upper bushing (22) is provided with threads, the inner wall of the lower bushing (12) is smooth, the screw (4) penetrates through the lower bushing (12) from bottom to top and is in threaded connection with the upper bushing (22), and the inner side face of the nut of the screw (4) is abutted to the lower bushing (12).

2. The assembly for connecting high voltage components of a battery distribution integration system of claim 1, wherein: a concave locking surface (121) is formed in the end face of the bottom of the lower bushing (12), and the inner side face of a nut of the screw (4) is abutted to the locking surface (121).

3. The assembly for connecting high voltage components of a battery distribution integration system of claim 2, wherein: annular groove (122) have been seted up in the middle of lower liner (12), and both sides are provided with anti-skidding line (123) respectively about annular groove (122), lower liner (12) and base body (11) integrative injection moulding.

4. The assembly for connecting high voltage components of a battery distribution integration system of claim 1, wherein: the fixed contact of the contactor (2) and the copper bar (3) are mutually abutted and fixedly connected, and a gap of 0-1 mm is arranged between the lower end face of the upper bushing (22) and the upper end face of the lower bushing (12).

5. The assembly for connecting high voltage components of a battery distribution integration system of claim 4, wherein: and the manufacturing tolerance X between the lower end surface of the upper bushing (22) and the mounting surfaces of the fixed contact of the contactor (2) and the copper bar (3) is zero or a negative value.

6. An electric vehicle, characterized in that: the connecting component comprises the high-voltage component connecting component of the battery power distribution integrated system as claimed in any one of claims 1 to 5.