WO2019184491A1

WO2019184491A1 - Cable assembly and battery box

Info

Publication number: WO2019184491A1
Application number: PCT/CN2018/124605
Authority: WO
Inventors: 杨明平; 李建伟; 郑松太; 郭彩
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2018-03-30
Filing date: 2018-12-28
Publication date: 2019-10-03
Also published as: CN208335779U

Abstract

A cable assembly (1) and a battery box; the cable assembly (1) is used for the battery box, and comprises: a conductor (10) that comprises a plurality of conductive cables (101) extending along a first direction (X), the conductor (10) having two opposite end parts in the first direction (X); an insulating protective body (20) that is arranged coating the conductor (10) along the first direction (X); and two connection terminals (30) that are respectively electrically connected to the two end parts and are clamped and fixed to the insulating protective body (20), wherein the cross-sectional shape of the insulating protective body (20) in the first direction (X) is a flat ring, and the width of the insulating protective body (20) is greater than the thickness. The battery cable assembly (1) may meet electrical connection requirements of each component in the battery box while simultaneously occupying a small space, which may effectively improve the grouping efficiency and safety performance of the battery box.

Description

Cable assembly and battery box

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201820462484.5, filed on March 30, 20, the entire disclosure of which is incorporated herein by reference.

Technical field

The present application relates to the field of battery technologies, and in particular, to a cable assembly and a battery box.

Background technique

Battery boxes are often used in new energy vehicles to provide driving power for new energy vehicles, such as hybrid or electric vehicles. With the continuous development of new energy technologies, the energy density requirements for new energy vehicles are getting higher and higher. At the same time, in order to pursue higher group efficiency, the battery box has more and more space requirements for components inside the battery box. High, therefore, there is less space left inside the battery box for cables.

The cable in the prior art has been unable to meet the electrical connection requirements between the various components in the battery box, and the main performance is that after the cable of the prior art is assembled in a conventional assembly manner, it often interferes with other components of the battery box. Especially when the cable needs to be bent, the need for a larger accommodation space will seriously affect the packaging of the cover and other components.

In order to meet the electrical connection and assembly requirements between the various components in the battery box, it is usually necessary to remove the outer protective layer of the cable, such as a braided mesh tube, a bellows, etc., to reduce the space occupied by the cable, which will result in the safety of the entire battery box. decline. Due to the removal of the protective layer, when the insulation of the cable is worn, the insulation of the battery box may fail, which may even lead to more serious safety problems.

Therefore, there is a need for a new cable assembly and battery box.

Summary of the invention

The embodiment of the present application provides a cable assembly and a battery box. The cable assembly can meet the electrical connection requirements of the battery box, and the space occupied is small, and the group efficiency and safety performance of the battery box can be effectively improved.

In one aspect, a cable assembly is provided according to an embodiment of the present application, for a battery case, including: a conductor including a plurality of conductive cables each extending in a first direction, the conductor having two opposite ends in a first direction And an insulating protection body disposed along the first direction of the conductor; two connection terminals respectively electrically connected to the two ends and clamped and fixed to the insulation protection body; wherein the insulation protection body has a cross-sectional shape in the first direction In the case of a flat ring, the width of the insulating protector itself is greater than the thickness value.

In another aspect, a battery case according to an embodiment of the present application includes: a battery case; a battery module disposed on the battery case, the battery module includes a plurality of stacked single cells and output electrodes, and the output electrodes are The battery module is electrically connected to the pole of the single battery of the output terminal; wherein the one of the connection terminals of the cable assembly is electrically connected to the output electrode, and the other connection terminal is used for electrical connection with other components.

According to the cable assembly and the battery case provided by the embodiment of the present application, the cable assembly includes a conductor, an insulation protector and two connection terminals, and the conductor includes a plurality of conductive cables extending in the first direction, and the insulation protector is in the first direction The conductors are covered to ensure the safe use of the conductive cables of the conductors. The two connecting terminals are respectively electrically connected to the two ends of the conductor and are reliably clamped and fixed on the insulating protector to electrically connect components in the battery box or components in the battery box and external components. connection. Since the cross-sectional shape of the insulating protection body in the first direction is a flat ring, and the width value of the insulating protection body itself is larger than the thickness value, the cable assembly can be thickened when applied to the battery case, especially when bending is required. The direction is bent to reduce the space occupied by the cable assembly, which in turn improves the group efficiency and safety performance of the battery box.

DRAWINGS

Features, advantages, and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

1 is a schematic overall structural view of a cable assembly according to an embodiment of the present application;

2 is a cross-sectional view of the cable assembly of the embodiment of the present application in a first direction;

Figure 3 is a cross-sectional view of the cable assembly of the other embodiment of the present application in a first direction;

4 is a cross-sectional view of the cable assembly in a first direction of still another embodiment of the present application;

Figure 5 is a cross-sectional view of the cable assembly in a first direction of still another embodiment of the present application;

FIG. 6 is a partial structural schematic view of a battery case according to an embodiment of the present application.

among them:

X-first direction; H-thickness value; M-width value;

1-cable assembly;

10-conductor; 101-conductive cable; 101a-wire; 101b-protective layer;

20-insulating protector; 201-first surface; 202-second surface; 203-third surface; 204-fourth surface;

30-connection terminal; 301-crimp interface; 302-connection hole;

2- battery case;

3-battery module;

4-output electrode;

5-high voltage connector;

6-Manual maintenance switch.

detailed description

Features and exemplary embodiments of various aspects of the present application are described in detail below. In the following detailed description, numerous specific details are set forth However, it will be apparent to those skilled in the art that the present disclosure may be practiced without some of the details. The following description of the embodiments is merely provided to provide a better understanding of the present application. In the drawings and the following description, at least some of the structures and techniques are not shown in order to avoid unnecessary obscuring of the present application; and, for clarity, the dimensions of some of the structures may be exaggerated. Furthermore, the features, structures, or characteristics described hereinafter may be combined in any suitable manner in one or more embodiments.

The orientation words appearing in the following description are all directions shown in the drawings, and are not intended to limit the specific structure of the cable assembly and the battery case of the present application. In the description of the present application, it should also be noted that the terms "installation" and "connection" are to be understood broadly, and may be, for example, a fixed connection or a detachable connection, or Connected in one piece; they can be connected directly or indirectly. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood as the case may be.

The cable assembly provided by the embodiment of the present application can be used for a battery box to meet electrical connection requirements between components of the battery box or with the outside world. At the same time, the overall occupied space of the cable assembly is small, and the battery box can be effectively improved. Efficiency and safety performance, and can meet the requirements of improving the energy density of new energy vehicles.

For a better understanding of the present application, a cable assembly and a battery box according to embodiments of the present application will be described in detail below with reference to FIGS. 1 through 6.

1 is a schematic view showing the overall structure of a cable assembly according to an embodiment of the present application. FIG. 2 is a cross-sectional view showing the cable assembly of the embodiment of the present application in a first direction X. A cable assembly 1 according to an embodiment of the present application includes a conductor 10, an insulation protector 20 and two connection terminals 30. The conductor 10 includes a plurality of conductive cables 101 each extending in a first direction X. The conductor 10 is The first direction X has two opposite ends. The insulating protector 20 is disposed to cover the conductor 10 in the first direction X. The two connecting terminals 30 are respectively electrically connected to the two ends of the conductor 10 and are clamped and fixed to the insulating protector 20. The cross-sectional shape of the insulating protector 20 in the first direction X is a flat ring, and the insulating protector 20 itself The width value M is greater than the thickness value H.

Specifically, as shown in FIG. 2, the insulating protection body 20 has oppositely disposed first surface 201, second surface 202, and third surface 203 and fourth surface oppositely disposed and respectively connecting the first surface 201 and the second surface 202. 204. The first surface 201, the second surface 202, the third surface 203, and the fourth surface 204 all extend along the first direction X, that is, the extending direction of each of the conductive cables 101. By coating the insulating protector 20 on the conductor 10, the safe use of the conductive wires 101 of the conductor 10 can be ensured, and the occurrence of leakage of the conductive wires 101 can be avoided. Specifically, the insulating protective body 20 may be made of a crosslinked polyolefin material. Of course, other materials capable of insulating the conductive cable 101 may be used.

The maximum value of the distance between the first surface 201 and the second surface 202 is the thickness value H of the insulating protective body 20 itself, and the maximum value of the distance between the third surface 203 and the fourth surface 204 is the insulating protective body 20 The width value M of the self, preferably the width value M of the insulating protector 20 itself is more than twice the thickness value H. When applied to the battery case, especially when bending is required, the cable assembly 1 can be folded in the thickness direction. The bend can better meet the electrical connection requirements of the battery box, and at the same time reduce the occupied space of the cable assembly 1, thereby improving the group efficiency and safety performance of the battery box.

The first surface 201 and the second surface 202 in this embodiment are all planar, and the third surface 203 and the fourth surface 204 are both curved surfaces, and the surfaces are smoothly transitioned between the surfaces, so that the insulating protection body 20 is in the first direction. The flat ring of the cross section of X is specifically a waist circular ring, and the waist circle means that a circle is divided into two semicircular arcs by a circular center and translated in opposite directions with each other, and two equal length parallel lines are used. A closed pattern formed by joining the ends of two semicircular arcs.

Referring to FIG. 2 , the conductor 10 of the embodiment of the present application includes five conductive cables 101 , each of which is embedded in the insulating protection body 20 , in order to further reduce the occupied space of the cable assembly 1 , and The bending requirements of the cable assembly 1 are better satisfied. As an alternative embodiment, the five conductive cables 101 of the conductor 10 are parallel to each other and are arranged side by side in the width direction of the insulating protection body 20.

In this embodiment, five conductive cables 101 are arranged side by side on the same row, that is, five conductive cables 101 are arranged in a row, and two adjacent conductive cables 101 are attached to each other, thereby minimizing the cable assembly. 1 occupied space.

In order to better meet the electrical and electrical requirements, as an alternative embodiment, each of the conductive cables 101 is twisted by a plurality of wires 101a extending in the first direction X, and each of the conductive cables 101 The outer peripheral surface is covered with a protective layer 101b. The material of the protective layer 101b may be the same as that of the insulating protective body 20. It may be different, and may be used to further provide protection to the conductive cable 101 to avoid leakage.

Continuing to refer to FIG. 1 , as a preferred embodiment, the connection terminal 30 of the embodiment of the present application has a block structure as a whole and has a crimping interface 301 , and the connection terminal 30 is crimped and connected to the insulating protection body 20 through the crimping interface 301 . .

In this embodiment, the connection terminal 30 is a rectangular block structure. The crimp interface 301 is located on the side of the connection terminal 30 facing the insulation protection body 20, and the shape of the pressure connection interface 301 and the cross section of the insulation protection body 20 in the first direction X. The shapes are matched to better satisfy the stability of the connection between the connection terminal 30 and the insulating protector 20 and the reliability of electrical connection with the conductor 10 inside the insulating protector 20.

Moreover, the above connection manner is adopted between the connection terminal 30 and the insulating protection body 20, so that when the cable assembly 1 cannot be electrically connected due to damage of the connection terminal 30, the size of the crimp interface 301 can be enlarged by means of a tool, so that The damaged connecting terminal 30 is separated from the insulating protector 20 and the conductor 10, and the new connecting terminal 30 can be replaced. The cable assembly 1 can be reused and the cost can be saved.

In order to facilitate electrical connection between components in the battery case or external components, as an alternative embodiment, the connection terminal 30 is provided with a connection hole 302 penetrating in its own thickness direction. When connecting with other components, fasteners such as locking bolts, locking screws, and the like can be passed through the connecting hole 302 to fix and electrically connect the connecting terminal 30 to other components.

The number of the conductive cables 101 of the cable assembly 1 of the above embodiments is five and is arranged in a row in the width direction of the insulating protector 20, and the adjacent two conductive cables 101 are attached to each other, which is preferable. Embodiments are, but not limited to, the above. In some optional embodiments, the number of conductive cables 101 may be less than five, such as three, four, and of course, more than five, such as six, eight or even more.

At the same time, on the basis of meeting the space requirement of the cable assembly 1, the plurality of conductive cables 101 arranged side by side in the width direction of the insulating protection body 20 are not limited to being arranged in a row, and may be arranged in two rows or more. When there are two or more rows, the adjacent two rows of conductive cables 101 are alternately arranged. At the same time, the adjacent two conductive cables 101 are not limited to being disposed in contact with each other, and may be disposed at intervals.

Please refer to FIG. 3 together. FIG. 3 is a cross-sectional view of the cable assembly 1 in the first direction X according to another embodiment of the present application. The cable assembly 1 shown in the embodiment of the present invention has substantially the same structure as the cable assembly 1 shown in FIG. 2, except that the conductive cable 101 includes eleven and eleven conductive lines in this embodiment. The cables 101 are arranged in two rows in the thickness direction of the insulating protection body 20. The two rows of conductive cables 101 are staggered and attached to each other, and the same row of conductive cables 101 are spaced apart from each other. Of course, in some possible embodiments, the same The cable assemblies 1 of the row can also be attached to each other.

The cable assembly 1 of the form shown in FIG. 3 can better meet the requirements for reducing the space occupied by the cable assembly 1, and can better meet the split, parallel and shunting of the conductive cable 101 in the cable assembly 1 with improved structure. Requires that it is suitable for the requirements of the battery box for the high-voltage cable assembly 1 while being easy to bend.

The flat rings of the insulating protective body 20 of the above embodiments in the cross section of the first direction X are all waist-round rings, and it is understood that the flat ring is not limited to a waist circular ring.

Referring to FIG. 4 together, FIG. 4 shows a cross-sectional view of the cable assembly 1 in a first direction X according to still another embodiment of the present application. The embodiment is substantially the same as the embodiment of the embodiment shown in FIG. 2, except that the third surface 203 and the fourth surface 204 of the insulating protection body 20 are also planar, that is, the insulating protection body of the embodiment shown in FIG. The flat ring formed in the cross section of the first direction X is a rectangular ring, and can also meet the requirement of reducing the space occupied by the cable assembly 1.

Referring to FIG. 5 together, FIG. 5 shows a cross-sectional view of the cable assembly 1 in the first direction X of still another embodiment of the present application. This embodiment is basically the same as the embodiment of the embodiment shown in FIG. 2, except that the first surface 201 and the second surface 202 of the insulating protection body 20 are also curved surfaces, that is, the insulation of the embodiment shown in FIG. The flat ring of the protective body 20 in the cross section of the first direction X is an elliptical ring, which can also meet the requirement of reducing the space occupied by the cable assembly 1.

Thus, the cable assembly 1 provided by the embodiment of the present application can be used for a battery case, and the correspondingly disposed insulating protection body 20 can ensure the safe use of each conductive cable 101 of the conductor 10. The two connection terminals 30 are electrically connected to the two ends of the conductor 10 and are reliably clamped and fixed to the insulation protector 20, and can electrically connect components in the battery case or between external components. When applied to the battery box, especially when bending is required, the cable assembly 1 can be bent in the thickness direction to reduce the space occupied by the cable assembly 1, thereby improving the group efficiency and safety performance of the battery box.

Referring to FIG. 6 together, the embodiment of the present application provides a battery box including a battery case 2, a battery module 3, an output electrode 4, and the cable assembly 1 of the above embodiments. The battery module 3 is disposed in the battery case 2, and includes a plurality of stacked unit cells and an output electrode 4, and the output electrode 4 is electrically connected to the poles of the unit cells of the battery module 3 as an output end. One of the connection terminals 30 of the cable assembly 1 is electrically connected to the output electrode 4, and the other connection terminal 30 is used for electrical connection with other components. The other components may be components in the battery case or non-battery. The components in the box, or the other components mentioned above, are components other than the output electrode 4, and may be connected according to the use requirements. For example, the external device referred to herein may be a high voltage connector 5 and/or a manual maintenance switch 6, which is connected to the battery case 2, that is, an MSD or the like.

Since the battery case provided by the embodiment of the present application includes the cable assembly 1 of the above embodiments, the space requirement of the internal components can be satisfied. When assembling, the cable assembly 1 can meet the electrical connection requirements of the components, and Other components do not cause interference and improve the efficiency of the battery box itself. At the same time, when applied to new energy vehicles, the battery box can effectively increase the energy density of new energy vehicles and is easy to promote.

Although the present application has been described with reference to the preferred embodiments, various modifications may be made thereto and the components may be replaced with equivalents without departing from the scope of the application. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

A cable assembly for a battery box, comprising:

a conductor comprising a plurality of electrically conductive cables each extending in a first direction, the conductor having two opposite ends in the first direction;

An insulating protection body covering the conductor in the first direction;

Two connection terminals are respectively electrically connected to the two end portions and clamped and fixed to the insulation protection body;

The cross-sectional shape of the insulating protective body in the first direction is a flat ring, and the insulating protector itself has a width value greater than a thickness value.
The cable assembly of claim 1 wherein said width value is more than twice said thickness value.
The cable assembly according to claim 1, wherein the plurality of the conductive cables are parallel to each other and arranged side by side in the width direction of the insulating protector.
The cable assembly according to claim 3, wherein the plurality of the conductive cables are arranged in a row, and the two adjacent conductive cables are attached to each other.
The cable assembly according to claim 3, wherein the plurality of the conductive cables are arranged in two or more rows in a thickness direction of the insulating protector, and the adjacent two rows of the conductive cables are staggered.
The cable assembly according to any one of claims 1 to 5, wherein the flat ring is a waist circular ring, a rectangular ring or an elliptical ring.
The cable assembly according to any one of claims 1 to 5, wherein the connection terminal is a block-like structure as a whole and has a crimping interface, and the connecting terminal is pressed by the crimping interface and the insulating protector Connected.
The cable assembly according to claim 7, wherein the connection terminal is provided with a connection hole penetrating in its own thickness direction.
The cable assembly according to any one of claims 1 to 5, wherein each of the conductive cables is twisted by a plurality of wires extending in the first direction, each of the conductive cables The outer peripheral surface is coated with a protective layer.
A battery box, comprising:

Battery case

a battery module, disposed in the battery case, the battery module includes a plurality of stacked single cells and an output electrode, the output electrode and the battery module as an output end of the single cell Column electrical connection;

A cable assembly according to any one of claims 1 to 9;

Wherein one of the connection terminals of the cable assembly is electrically connected to the output electrode, and the other of the connection terminals is used for electrical connection with other components.