WO2019134697A1

WO2019134697A1 - Battery unit, battery module, and vehicle

Info

Publication number: WO2019134697A1
Application number: PCT/CN2019/070630
Authority: WO
Inventors: 胡世超; 蒋露霞; 潘仪; 程晗
Original assignee: 比亚迪股份有限公司
Priority date: 2018-01-08
Filing date: 2019-01-07
Publication date: 2019-07-11

Abstract

A battery unit (100), comprising a shell (3), a cover plate (4), electrode posts (5), and an electrode core; the shell (3) is provided with an opening (32); the cover plate (4) covers and seals the opening (32); the electrode core is arranged in the shell (3); the cover plate (4) comprises a cover plate body (42) and inwardly recessed cavity portions (41) formed in the cover plate body 42; and the electrode posts (5) are accommodated in the recessed cavity portions (41).

Description

Battery unit, battery module and car

Cross-reference to related applications

Priority is claimed on Chinese Patent Application No. 201810015504.9, No. 201810016060.0, No. 201810015506.8, 201810016052.6, 201810015502.X, 201810016520.X, 201810015503.4, 201810016056.4, filed on January 8, 2018; this application claims May 17, 2018 Priority of Chinese patent application filed on the Japanese Patent Application No. 201101476313.2.

Technical field

The present application relates to the field of batteries, and some embodiments relate to a battery unit, a battery module, and an automobile.

Background technique

With the development of technology, various electronic devices, power tools, etc. are widely used, such as mobile phones, electric vehicles, etc. As a core component, the performance of the battery has an important impact on the overall performance and experience; among them, the capacity of the battery determines The overall battery life is also an important concern for users.

The battery includes a casing and a pole core disposed in the casing. The volume of the battery unit determines the volume of the core core to a certain extent, and is an important determinant of the battery capacity. In electronic equipment and power tools, the installation environment of the battery is basically determined. With the size of the space occupied by the battery, the overall volume of the battery is difficult to increase without limitation, and the capacity of the battery is also limited.

Application content

It is an object of the present application to provide a battery unit to increase battery capacity in the presence of space constraints.

In order to achieve the above object, the present application provides a battery unit, wherein the battery unit includes a casing, a cover plate, a pole and a pole core, the casing has an opening, and the cover covers the opening, A pole core is disposed within the outer casing, the cover plate including a cover body and an inwardly recessed cavity portion disposed on the cover body, the pole being received in the cavity portion.

According to some embodiments of the present application, the pole core includes a pole core body having a expansion end, the expansion end is provided with a pole fitting region and a expansion region protruding relative to the pole fitting region, the pole a column fitting region is recessed relative to the expansion region to form a pole mounting space, the pole portion extends through the cavity portion and extends toward the pole fitting region, the pole portion and the cavity portion At least partially disposed in the pole mounting space, the expansion zone is aligned with the cover body.

According to some embodiments of the present application, the pole fitting region is surrounded by the expansion region.

According to some embodiments of the present application, the cavity portion includes a tubular side wall and an annular bottom wall that extends into the tubular side wall and through the annular bottom wall.

According to some embodiments of the present application, a filler is disposed between the pole and the tubular sidewall.

According to some embodiments of the present application, the cover plate includes two spaced apart cavity portions, and the expansion end is provided with two spaced pole fitting regions, and the two concave portions are respectively The two pole fitting regions cooperate.

According to some embodiments of the present application, the cover plate includes two adjacent cavity portions, and the two cavity portions are disposed in the same one of the pole fitting regions.

According to some embodiments of the present application, the pole core includes a tab attached to the pole fitting region.

According to some embodiments of the present application, the pole core includes a tab that is coupled to the expansion zone and that extends to the pole fitting region.

According to some embodiments of the present application, the tab is integrally formed with the pole core body.

According to some embodiments of the present application, the tabs are attached to the expansion zone.

According to some embodiments of the present application, the pole is attached to the tab.

According to some embodiments of the present application, the inner side of the cavity portion is provided with an inner lead piece connected to the pole, and the pole is connected to the tab through the inner lead piece.

According to some embodiments of the present application, the pole protrudes outwardly relative to the cover body.

In addition, the present application provides a battery module, wherein the battery module includes the battery unit described in the above scheme.

In addition, the present application also provides an automobile, wherein the automobile includes at least one battery module described in the above aspect.

Through the above technical solution, the height of the cover body is raised outward relative to the cavity portion, occupying a space near the cavity portion, that is, a pole, increasing the internal volume of the battery unit, allowing the pole core to have a larger volume, Increase the capacity of the battery unit.

Additional aspects and advantages of the present invention will be set forth in part in the description which follows.

DRAWINGS

1 is a perspective view of a battery unit according to an embodiment of the present application;

2 is a cross-sectional view of the battery unit according to an embodiment of the present application;

Figure 3 is a partial enlarged view of Figure 2;

4 is a perspective view of a pole core according to an embodiment of the present application;

Figure 5 is a perspective view of a pole core according to an embodiment of the present application;

6 is a schematic diagram of a battery module according to an embodiment of the present application;

Fig. 7 is a schematic view of a car according to an embodiment of the present application.

Description of the reference numerals

100 battery unit 200 battery module

300 cars

1 pole core body 2 pole

3 housing 4 cover

5 pole 6 inner lead

11 expansion end

111 expansion area 112 pole fitting area

41 cavity part 42 cover body

Detailed ways

The embodiments of the present application are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative, and are not to be construed as limiting.

The present application provides a battery unit 100, wherein the battery unit 100 includes a housing 3, a cover 4, a pole 5 and a pole core, the housing 3 having an opening 32, the cover 4 covering the opening 32. The pole core is disposed in the outer casing 3. The cover plate 4 includes a cover body 42 and an inwardly recessed cavity portion 41 disposed on the cover body 42. The pole 5 accommodates In the cavity portion 41.

As shown in FIGS. 1 and 2, the cover body 42 is formed substantially in a flat shape, and the cavity portion 41 is recessed relative to the cover body 42. The pole post 5 is received in the cavity portion 41 and is connectable to the electric device. In the prior art, the cover plate 4 is substantially flat in shape, and the pole 5 extends through the cover plate 4 to the outside. Compared with this, the present application is equivalent to raising the overall height of the cover plate 4, so that the outer casing 3 and the outer casing 3 The volume of the cavity formed by the cover plate 4 is increased, which is convenient for increasing the volume of the pole core and realizing expansion.

In some embodiments, the pole core includes a pole core body 1 having a flared end 11 that is provided with a pole fitting region 112 and a expansion region 111 that is convex relative to the pole fitting region 112. The pole fitting region 112 is recessed relative to the expansion region 111 to form a pole mounting space, and the pole 5 passes through the cavity portion 41 and extends toward the pole fitting region 112. The pole 5 and the cavity portion 41 are at least partially disposed in the pole mounting space, and the expansion region 111 is aligned with the cover body 42.

The expansion end 11 is covered by the cover 4, and the area occupied by the pole 5 and the cavity 41 is the pole fitting area 112, and the area not occupied by the pole 5 and the cavity 41 is convex toward the cover 4. The expansion region 111 is formed to increase the volume of the pole core body 1, thereby realizing expansion. The pole fitting region 112 is recessed relative to the expansion region to form a pole mounting space, and the pole post 5 and the cavity portion 41 are at least partially housed in the pole mounting space.

In addition, the pole fitting region 112 is surrounded by the expansion region 111. In the pole core shown in FIGS. 4 and 5, the pole fitting region 112 is disposed between the two expansion regions 111, and the substantially cylindrical cavity portion 41 can accommodate the pole between the two expansion regions 111. In the column mounting space, the pole mounting space is formed substantially in a hexahedral shape. In order to increase the volume of the pole core body 1 in some embodiments, the pole column mounting space may be formed in a substantially cylindrical shape, that is, the pole fitting region 112 is surrounded by the expansion region 111 to enclose a recess having a circular cross section. To accommodate the cylindrical cavity portion 41.

In some embodiments, the cavity portion 41 includes a tubular side wall and an annular bottom wall that extends into the tubular side wall and through the annular bottom wall. As shown in FIGS. 2 and 3, the cavity portion 41 is formed by a tubular side wall and an annular bottom wall, and the annular bottom wall is provided with a through hole to allow the pole 5 to pass therethrough. The shape of the cavity portion 41 corresponds to the cylindrical shape of the pole 5, and the volume occupied by the cavity portion 41 can be sufficiently reduced. Of course, the pole 5 can be formed into other shapes, for example, a hexagonal prism, a rectangular parallelepiped shape, or the like.

In addition, a filler is disposed between the pole 5 and the tubular side wall. The pole 5 is spaced from the tubular side wall by a filler, the filler may be made of an insulating material, and the filler may have elasticity to cushion the pole 5 and the tubular sidewall.

According to an embodiment of the present application, the cover plate 4 includes two spaced-apart cavity portions 41, and the expansion end 11 is provided with two spaced-apart pole fitting regions 112, two of which are The cavity portions 41 are respectively engaged with the two pole fitting regions 112. As shown in FIG. 2, FIG. 3, FIG. 4 and FIG. 5, the expansion end 11 is provided with two pole fitting regions 112, two poles 5 can be respectively installed, and the corresponding cover plate 4 is provided with two concave portions. 41. Two cavity portions 41 are respectively disposed at the two pole fitting regions 112.

According to an embodiment of the present application, the cover plate 4 includes two adjacent cavity portions 41, and the two cavity portions 41 are disposed in the same pole fitting region 112. When the distance between the two cavity portions 41 is relatively short, the pole core body 1 may be provided with a pole fitting region 112, and the pole column mounting space formed by the pole fitting region 112 may accommodate the two cavity portions 41 at the same time.

Additionally, the pole core includes a tab 2 that is coupled to the pole fitting region 112. As shown in FIG. 4, the tab 2 is connected to the pole fitting region 112 and can be electrically connected to the pole 5.

Alternatively, the pole core includes a tab 2 that is coupled to the expansion zone 111 and that extends to the pole fitting region 112. As shown in FIG. 5, the tabs 2 are connected to the expansion region 111 and may extend to the pole fitting region 112 to be electrically connected to the corresponding poles 5.

According to some embodiments of the present application, the tab 2 is integrally formed with the pole core body 1. The tab 2 and the pole core body 1 are integrally formed of a material made into a pole core, and the tab 2 includes two tabs as a positive electrode and a negative electrode. Of course, in other embodiments, the tab 2 can be additionally fabricated and attached to the pole core body 1.

As described above, the pole 5 is connected to the tab 2 . The pole 5 and the tab 2 may be directly connected or may be connected by other structures.

According to some embodiments of the present application, the inner side of the cavity portion 41 is provided with an inner lead piece 6 connected to the pole 5, and the pole piece 5 is connected to the tab 2 through the inner lead piece 6. . As shown in FIG. 3, the inner side of the cavity portion 41 is a side facing the pole core, and the cavity portion 41 is disposed in the pole fitting region 112 (not labeled in FIG. 3), and the inner lead piece 6 can be attached thereto. On the annular bottom wall of the cavity portion 41, the pole 5 is connected to the inner lead piece 6, and is electrically connected to the tab 2 located in the pole fitting region 112 through the inner lead piece 6.

In addition, the pole 5 protrudes outward relative to the cover body 42. As shown in FIG. 1, the upper end of the pole 5 protrudes outwardly relative to the cover body 42, that is, the pole 5 is higher than the outer surface of the cover body 42, and external electrical equipment can be more conveniently connected to the pole 5. .

In addition, as shown in FIG. 6, the present application further provides a battery module, wherein the battery module includes the battery unit described in the above scheme. The battery module 200 may include a plurality of the battery cells 100, and the plurality of battery cells 100 are connected in series or in parallel to supply power.

In addition, as shown in FIG. 7, the present application further provides an automobile 300, wherein the automobile 300 includes at least one battery module 200 described in the above scheme.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the indications of "radial", "circumferential", etc., is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present application and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is therefore not to be construed as limiting.

Moreover, the terms "first" and "second" 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, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is two or more unless specifically and specifically defined.

In the present application, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless otherwise explicitly stated and defined. , or integrated; can be mechanical connection, or can be electrical connection; can be directly connected, or can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood on a case-by-case basis.

In the present application, the first feature "on" or "below" the second feature may be the direct contact of the first and second features, or the first and second features are indirectly through the intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the application. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

While the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the present application. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A battery unit (100), characterized in that the battery unit (100) comprises a casing (3), a cover plate (4), a pole (5) and a pole core, the casing (3) having an opening (32) The cover (4) covers the opening (32), the pole core is disposed in the outer casing (3), the cover plate (4) includes a cover body (42) and is disposed at the An inwardly recessed cavity portion (41) on the cover body (42), the pole (5) being received in the cavity portion (41).
The battery unit (100) according to claim 1, wherein the pole core comprises a pole core body (1) having a expansion end (11), and the expansion end (11) is provided with a pole fitting area (112) and a expansion area (111) protruding relative to the pole fitting area (112), the pole fitting area (112) is recessed relative to the expansion area (111) to form a pole mounting Space, the pole (5) extends through the cavity portion (41) and extends toward the pole fitting region (112), the pole (5) and the cavity portion (41) being at least Partially disposed in the pole mounting space, the expansion zone (111) is aligned with the cover body (42).
The battery unit (100) according to claim 2, characterized in that the pole fitting region (112) is surrounded by the expansion region (111).
The battery unit (100) according to claim 3, wherein the cavity portion (41) comprises a tubular side wall and an annular bottom wall, the pole (5) extending into the tubular side wall and wearing Pass the annular bottom wall.
The battery unit (100) according to claim 4, characterized in that a filler is provided between the pole (5) and the tubular side wall.
The battery unit (100) according to claim 2, wherein the cover plate (4) comprises two spaced apart cavity portions (41), and the expansion end (11) is provided with two The spaced-apart pole fitting regions (112), the two of the cavity portions (41) are respectively mated with the two pole fitting regions (112).
The battery unit (100) according to claim 2, wherein the cover plate (4) comprises two adjacent cavity portions (41), and the two cavity portions (41) It is disposed in the same pole fitting area (112).
The battery unit (100) according to claim 2, characterized in that the pole core comprises a tab (2) connected to the pole fitting region (112).
The battery unit (100) according to claim 2, wherein the pole core comprises a tab (2) connected to the expansion region (111) and extending to the pole fitting region (112) .
The battery unit (100) according to claim 8 or 9, characterized in that the tab (2) is integrally formed with the pole core body (1).
The battery unit (100) according to claim 8 or 9, wherein the tab (2) is attached to the expansion area (111).
A battery unit (100) according to claim 8 or 9, characterized in that the pole (5) is connected to the tab (2).
The battery unit (100) according to claim 12, characterized in that the inner side of the cavity portion (41) is provided with an inner lead piece (6) connected to the pole (5), the pole (5) being connected to the tab (2) by the inner lead piece (6).
The battery unit (100) according to claim 1, characterized in that the pole (5) projects outwardly relative to the cover body (42).
A battery module (200), characterized in that the battery module (200) comprises the battery unit (100) according to any one of claims 1-14.
A vehicle (300), characterized in that the vehicle (300) comprises at least one battery module (200) according to claim 15.