WO2019148634A1

WO2019148634A1 - Battery module

Info

Publication number: WO2019148634A1
Application number: PCT/CN2018/081580
Authority: WO
Inventors: 何润泳; 陈亮美; 刘杨; 马林; 李中泽; 王良诣
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2018-01-31
Filing date: 2018-04-02
Publication date: 2019-08-08
Also published as: CN207818731U

Abstract

The present application relates to a battery module. The battery module comprises: batteries; an output electrode assembly, the output electrode assembly comprising an output electrode pole connected to the batteries, and a connection terminal connected to an external conductive terminal, the connection terminal being in communication with the output electrode pole; a module housing, the batteries being accommodated within the module housing, the output electrode assembly being arranged on the module housing. The connection terminal comprises a contact portion extending out from the module housing, the contact portion being arranged so as to be connected to the external conductive terminal, the contact portion being obliquely arranged with respect to the horizontal plane. The present solution increases the size of the connection terminal, thereby correspondingly increasing the contact area between the contact portion and a connection bolt, and increasing the flow capability.

Description

Battery module

Technical field

The present application relates to the field of energy storage devices, and in particular, to a battery module.

Background technique

In order to increase the energy density of the secondary battery, the specific energy of the battery module can be improved by the limit design, that is, the battery module of the same energy density occupies as much space as possible.

The space structure of the battery module with extreme design is very compact, which often leads to difficulty in the arrangement of components. For example, the connection terminal for outputting power of the battery module is limited in space due to space limitation.

Summary of the invention

The present application provides a battery module capable of improving the overcurrent capability of the connection terminal without increasing the existing design space.

The application provides a battery module comprising:

battery;

An output pole assembly including an output pole post connected to the battery and a connection terminal connected to the external conductive terminal, the connection terminal being electrically connected to the output pole post; and

a module housing, the battery is received in the module housing, and the output pole assembly is disposed in the module housing.

The connection terminal includes a contact portion that protrudes outside the module housing, the contact portion is disposed to be coupled to the external conductive terminal, and the contact portion is disposed obliquely with respect to a horizontal plane.

Optionally, the angle of inclination of the contact portion with respect to a horizontal plane is 2° to 18°.

Optionally, the connecting terminal further includes a connecting portion, the connecting portion is in contact with the contact portion and at an angle, the connecting portion is provided with a avoiding hole, and the avoiding hole is formed for fastening the a mounting space of the connecting bolt of the contact portion and the external conductive terminal.

Optionally, the contact portion includes an extension portion extending toward the escape hole.

Optionally, the contact portion is provided with a connecting hole through which the connecting bolt penetrates, and the connecting hole is disposed at a side of the contact portion close to the extending portion.

Optionally, the connecting hole is opened in a direction perpendicular to a surface thereof.

Optionally, one end of the connecting terminal away from the contact portion is disposed as a power receiving portion and a transition connecting portion connected to the output pole pole, and the power receiving portion is connected to the connecting portion via a transition connecting portion. ,

The power receiving portion and the connecting portion are respectively at a non-zero angle with the transition connecting portion.

Optionally, the power receiving portion and the connecting portion are respectively perpendicularly connected to the transition connecting portion.

Optionally, the output pole pole is soldered to the connecting terminal.

Optionally, the output pole pole is riveted to the connecting terminal.

The technical solution provided by the present application can achieve the following beneficial effects:

The present application provides a battery module in which an output pole assembly is respectively connected to a battery and an external conductive terminal, thereby outputting electric energy in the battery module. In order not to reduce the energy density of the battery module, the connection terminal is used for The contact portion of the external conductive terminal connection generally does not extend beyond the module housing. For this reason, the present application proposes that the contact portion is inclined with respect to the horizontal plane, that is, the contact portion extends upward or downward with respect to the horizontal plane. In contrast, in the same accommodation space, the contact portion in the up state or the down state can be extended for a longer length, and therefore, the contact area of the contact portion with the connection bolt can be increased correspondingly, thereby increasing the overcurrent capability.

The above general description and the following detailed description are merely exemplary and are not intended to limit the application.

DRAWINGS

1 is a schematic diagram of a partial structure of a battery module according to an embodiment of the present application;

2 is an exploded view of a partial structure of a battery module according to an embodiment of the present application;

3 is a schematic diagram of a connection terminal according to an embodiment of the present application;

Figure 4 is an A-A view of Figure 3;

Figure 5 is a schematic view showing the installation of the connecting terminal and the connecting bolt provided by the embodiment of the present application;

6 is an exploded view of an output pole assembly according to an embodiment of the present application;

FIG. 7 is a cross-sectional view of an output pole assembly according to an embodiment of the present application.

Reference mark:

100-battery module;

10-battery;

20-output pole assembly;

200-output pole pole;

202-connection terminal;

2020-electric energy receiving part;

2020a-via;

2022-contact portion;

2022a-extension;

2022b-connection hole;

2024-connecting part;

2024a-avoidance hole;

2026-transition connection portion;

204-first insulating member;

206-second insulation member;

30-module housing;

300-side plate;

302-end plate;

304-inner board;

304a-through hole;

500-connection bolts.

The drawings herein are incorporated in and constitute a part of the specification,

Detailed ways

The present application will be further described in detail below through specific embodiments and with reference to the accompanying drawings.

It should be noted that the words "upper", "lower", "left", "right" and the like described in the embodiments of the present application are described in the angles shown in the drawings, and should not be construed as being implemented in the present application. The definition of the example. In addition, in the context, it is to be understood that when an element is referred to as "on" or "the" Indirectly connected to another element "on" or "under" by an intermediate element.

As shown in FIG. 1 , the present application provides a battery module 100 that can be used as a power source for an electric device (eg, an electric vehicle).

The battery module 100 includes a battery 10, an output pole assembly 20, and a module housing 30. The battery 10 may include a plurality of battery cells or battery packs connected in parallel or in series, and are regularly arranged in the module housing 30.

According to an exemplary embodiment, the module housing 30 includes a bottom plate (not shown), a pair of side plates 300, a pair of end plates 302, and an upper cover (not shown), the pair of side plates 300 being opposite It is provided that a pair of end plates 302 are oppositely disposed, and the side plates 300 and the end plates 302 are sequentially connected to form a rectangular receiving space, and the bottom plate and the upper cover are oppositely disposed to close the opening of the rectangular receiving space.

The output pole assembly 20 can be disposed on the module housing 30. In one embodiment, for example, the output pole assembly 20 is disposed on the end plate 302. The output pole assembly 20 is generally arranged in two groups, one set as the total positive pole of the battery module 100 and the other set as the total negative pole of the battery module 100. The two sets of output pole assemblies 20 are respectively connected to the battery 10 and the external conductive terminals, The electric energy in the battery 10 is output.

In an optional embodiment, as shown in FIG. 1, the module housing 30 may further include a pair of inner plates 304 respectively connected to the two end plates 302. The inner plate 304 is disposed on the inner side of the end plate 302, two groups. The output pole assemblies 20 can be disposed on the inner panel 304, respectively.

As shown in FIG. 2, the output pole assembly 20 includes an output pole post 200 connected to the battery 10 and a connection terminal 202 connected to the external conductive terminal. The output pole post 200 is connected to the battery 10, and the connection terminal 202 is connected to the external conductive terminal. The inner plate 304 is provided with a through hole 304a, and the output pole post 200 is connected to the connection terminal 202 through the through hole 304a. The output pole assembly 20 further includes a first insulating member 204 and a second insulating member 206 respectively disposed on opposite sides of the inner panel 304. The first insulating member 204 is insulated between the connecting terminal 202 and the inner panel 304, and the second insulating member 206 The insulation is disposed between the output pole post 200 and the inner plate 304.

As shown in FIG. 3, the connection terminal 202 includes an adjacent power receiving portion 2020 and a contact portion 2022, wherein the power receiving portion 2020 is coupled to the output pole post 200, and the contact portion 2022 is coupled to the external conductive terminal.

In the present application, in order to increase the overcurrent capability of the connection terminal 202, in particular, the contact portion 2022 is disposed to be inclined with respect to the horizontal plane (see FIG. 4). That is, the contact portion 2022 extends outwardly in a manner that is raised or lowered relative to the horizontal plane, so that the contact portion 2022 in the up or down state may have a larger extension length in the same space. Therefore, the contact area of the contact portion 2022 with the connecting bolt 500 can be increased correspondingly, thereby increasing the overcurrent capability.

In the embodiment shown in FIG. 4, the contact portion 2022 is inclined downward relative to the horizontal plane such that there is a greater space above the contact portion 2022 for receiving the attachment bolt 500.

It is easy to understand that the larger the inclination angle of the contact portion 2022 with respect to the horizontal plane, the larger the size at which the contact portion 2022 can extend, but the connection bolts 500 that fasten the contact portion 2022 and the external conductive terminal as the inclination angle increases The inclination angle is also increased, and the operation space required to connect the bolts 500 during installation and disassembly is increased, which may cause the connection bolt 500 to interfere with the connection terminal 202, and therefore, in order to avoid the above defects The angle of inclination of the contact portion 2022 with respect to the horizontal plane cannot be increased without limitation.

According to an exemplary embodiment, the inclination angle may be set to 2° to 18° to avoid an excessive inclination angle, so that the flow area of the connection terminal 202 can be increased, and the operation space of the connection bolt 500 is not excessively increased. , causing interference.

4, the connection terminal 202 further includes a connection portion 2024, the power receiving portion 2020 is connected to the contact portion 2022 via the connection portion 2024, and the connection portion 2024 is disposed at an angle to the contact portion 2022.

The connecting portion 2024 is provided with a relief hole 2024a, and the arrangement of the escape hole 2024a removes a portion of the material of the connecting portion 2024, thereby providing a mounting space for the connecting bolt 500. When the inclination of the contact portion 2022 is set, the size thereof is correspondingly increased. At this time, the connection bolt 500 having a slightly larger diameter can be used to increase the connection strength and the overcurrent capability. Therefore, in order to prevent the connection bolt 500 from interfering with the connection portion 2024, Opening the relief hole 2024a at the connecting portion 2024 can increase the operating space of the connecting bolt 500 to facilitate the attachment and detachment of the connecting bolt 500.

Further, in order to effectively utilize the escape hole 2024a, the contact portion 2022 further includes an extended portion 2022a that protrudes toward the escape hole 2024a, and the extended portion 2022a occupies a part of the space of the escape hole 2024a, so that the size of the contact portion 2022 can be further increased, thereby further improving The contact area of the connection terminal 202 and the connection bolt 500 is increased to increase the overcurrent capability.

A connection hole 2022b through which the connection bolt 500 passes is provided in the contact portion 2022. In the embodiment in which the extension portion 2022a is provided, the connection hole 2022b may be disposed on a side of the contact portion 2022 near the extension portion 2022a. In this way, on the one hand, the connecting hole 2022b is not too close to the edge of the contact portion 2022, and the risk of the connecting hole 2022b not being broken can be reduced; on the other hand, since the connecting hole 2022b is not closer to the avoiding hole 2024a, the connecting bolt 500 The space inside the escape hole 2024a can be more fully utilized, so that the mounting difficulty of the connection bolt 500 is further reduced.

As shown in FIG. 5, after the contact portion 2022 is disposed obliquely with respect to the horizontal plane, the opening direction of the connecting hole 2022b can be selected to be perpendicular to the surface on which it is located, so that the head of the connecting bolt 500 can be ensured to be in good contact with the contact portion 2022. To avoid creating a virtual connection, thereby contributing to the improvement of the overcurrent capability of the connection terminal 202.

Referring again to FIG. 3, the connection terminal 202 further includes a transition connection portion 2026 that is coupled to the connection portion 2024 via the transition connection portion 2026.

The transition connecting portion 2026 is at a non-zero angle with the power receiving portion 2020 and the connecting portion 2024, respectively, that is, the power receiving portion 2020, the connecting portion 2024, and the transition connecting portion 2026 are connected together to form a bent structure.

The bending structure can make the connection terminal 202 save the space occupied by the power receiving portion 2020, the transition connecting portion 2026 and the connecting portion 2024 in the battery module 100 according to the space setting in the battery module 100, so as to improve the energy of the battery module 100. density.

According to an exemplary embodiment, the power receiving portion 2020 and the connecting portion 2024 are perpendicularly connected to the transition connecting portion 2026, that is, the power receiving portion 2020 and the connecting portion 2024 are substantially parallel.

The above solution can reduce the length of the connection terminal 202 in the lateral direction and effectively utilize the space in the longitudinal direction. Of course, according to the actual structure of the specific battery module 100, the power receiving portion 2020 and the connecting portion 2024 are respectively connected to the transition connecting portion 2026. The connection method can vary, not just vertical.

For the output pole assembly 20, the output pole post 200 and the connection terminal 202, more specifically, the output pole post 200 and the power receiving portion 2020 can be connected by welding or riveting.

In this embodiment, the output pole post 200 and the power receiving portion 2020 are fixed together by two combinations of welding and riveting. Specifically, as shown in FIG. 6, the power receiving portion 2020 is provided with a via 2020a that faces the through hole 304a, and a protruding portion of the output pole post 200 passes through the through hole 304a and is inserted into the via 2020a.

The through hole 2020a is a stepped hole. After the riveting, the top of the protruding portion is deformed and filled at the big end of the through hole 2020a, and the laser welding is performed after the riveting is completed, so that the connection between the output pole post 200 and the power receiving portion 2020 is more reliable. Refer to Figure 7 for a schematic view after riveting.

The above description is only the preferred embodiment of the present application, and is not intended to limit the present application, and various changes and modifications may be made to the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application are intended to be included within the scope of the present application.

Claims

A battery module, comprising:

battery;

An output pole assembly including an output pole pole connected to the battery and a connection terminal connected to the external conductive terminal, the connection terminal being connected to the output pole pole; and

a module housing, the battery is received in the module housing, and the output pole assembly is disposed in the module housing.

The connection terminal includes a contact portion that protrudes outside the module housing, the contact portion is disposed to be coupled to the external conductive terminal, and the contact portion is disposed obliquely with respect to a horizontal plane.
The battery module according to claim 1, wherein the contact portion is inclined downward with respect to a horizontal plane, and the inclination angle is 2 to 18 degrees.
The battery module according to claim 1, wherein the connecting terminal further comprises a connecting portion, the connecting portion is in contact with the contact portion and has an angle, and the connecting portion is provided with a avoiding hole. The avoidance hole provides a mounting space for fastening the connecting portion of the contact portion and the external conductive terminal.
The battery module according to claim 3, wherein the contact portion includes an extending portion that extends toward the escape hole.
The battery module according to claim 4, wherein the contact portion is provided with a connecting hole through which the connecting bolt penetrates, and the connecting hole is disposed at a side of the contact portion close to the extending portion .
The battery module according to claim 5, wherein the opening direction of the connecting hole is perpendicular to a surface thereof.
The battery module according to claim 3, wherein one end of the connecting terminal away from the contact portion is provided as a power receiving portion and a transition connecting portion, and the power receiving portion is connected to the connecting portion via a transition connecting portion Docking,

The power receiving portion and the connecting portion are respectively at a non-zero angle with the transition connecting portion.
The battery module according to claim 7, wherein said power receiving portion and said connecting portion are vertically connected to said transition connecting portion, respectively.
The battery module according to any one of claims 1 to 8, wherein the output pole post is welded to the connection terminal.
The battery module according to any one of claims 1 to 8, wherein the output pole post is riveted to the connection terminal.