TW201947811A - Battery unit, battery module and car - Google Patents

Abstract

The present disclosure relates to the field of batteries, and discloses a battery unit, a battery module, and an automobile, wherein the battery unit includes a casing, a cover plate, a pole and a pole core, and the cover plate includes a cover body and a cover expansion chamber. The expansion end of the pole core body is provided with a pole fitting area and a expansion area, the pole fitting area is recessed relative to the expansion area to form a pole mounting space, and the expansion area is at least partially accommodated in the The cover expands into the cavity. According to the above technical solution, in some surfaces of the pole core body, a pole fitting area corresponding to the pole column and a expansion area protruding relative to the pole fitting area are respectively disposed, and correspondingly, a expansion area is formed on the cover plate. The cover expands the cavity, thereby increasing the volume of the core body in a limited space near the pole and increasing the battery capacity.

Description

Battery unit, battery module and automobile

Cross-references to related applications <br/> This application requires a Chinese patent application with the application number 201810015504.9 filed on January 8, 2018, a Chinese patent application with the application number 201810016060.0 filed on January 8, 2018, and January 2018 Chinese patent application with application number 201810015506.8 submitted on the 8th, Chinese patent application with application number 201810016052.6 submitted on January 8, 2018, Chinese patent application with application number 201810015502.X submitted on January 8, 2018, 2018 Chinese patent application with application number 201810016520.X submitted on January 8th, Chinese patent application with application number 201810015503.4 submitted on January 8, 2018, and Chinese patent application with application number 201810016056.4 submitted on January 8, 2018 Priority of the application, Chinese patent application filed on May 17, 2018 with application number 201810476315.1.

The invention relates to the field of batteries, and relates to a battery unit, a battery module and a car.

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

The battery includes a casing and a pole core arranged in the casing. The volume of the battery cell determines the volume of the pole core to a certain extent and is an important determinant of the battery capacity. In electronic devices and power tools, the installation environment of the battery is basically determined. Due to the size of the space occupied by the battery, the overall volume of the battery is difficult to increase without restriction, and the capacity of the battery is therefore also limited.

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

In order to achieve the above object, the present invention provides a battery unit, wherein the battery unit includes a housing, a cover plate, a pole, and a pole core, the housing has an opening, the pole core is disposed in the housing, and the cover plate covers the An opening, the cover plate includes a cover plate body and a cover plate expansion cavity protruding outward with respect to the cover plate body; the pole post is arranged on the cover plate body and is electrically connected with the pole core, and the pole core includes a pole core A main body, the pole core main body including a capacity expansion end, the capacity expansion end is provided with a pole fitting area and a capacity expansion area protruding along the extending direction of the pole relative to the pole fitting area, and the pole fitting area is opposite A recessed space is formed in the expansion area to form a pole installation space, the pole is located at least partially in the pole installation space, and the capacity expansion area is at least partially accommodated in the cover volume expansion cavity.

In some embodiments, the cover plate body is recessed with respect to the cover plate expansion cavity to form a cover plate pole space, and the pole installation space is provided corresponding to the cover pole space position.

In some embodiments, the capacity expansion end is provided with one of the capacity expansion area in the middle and two pole adaptation areas respectively located on two sides of the capacity expansion area.

In some embodiments, the capacity expansion end is provided with three capacity expansion areas and two pole adaptation areas, and one pole adaptation area is provided between two adjacent capacity expansion areas.

In some embodiments, the capacity expansion end is provided with one of the pole-fitting areas and two of the capacity-fitting areas respectively located on two sides of the pole-fitting areas.

In some embodiments, the pole core body is provided with two of the expansion ends, and each of the expansion ends is provided with a pole adaption area.

In some embodiments, the two expansion ends are respectively located at opposite ends of the core body.

In some embodiments, each of the expansion ends is provided with one pole adaptation area and one expansion area.

In some embodiments, the two pole adaption regions are aligned or staggered from each other.

In some embodiments, the capacity expansion end is provided with one pole adaption area and two capacity expansion areas respectively located on two sides of the pole adaption area.

In some embodiments, the pole-fitting regions are aligned or offset from each other.

In some embodiments, the pole core includes a pole lug at least partially located in the pole fitting region.

In some embodiments, the pole tab is integrally formed with the pole core body.

In some embodiments, an inner lead-out piece connected to the pole is provided on the inner side of the cover plate, and the pole is connected to the pole ear through the inner lead-out piece.

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

In addition, the present invention also provides an automobile, wherein the automobile includes at least one battery module according to the above solution.

With the above technical solution, in some surfaces of the pole core main body, a pole fitting area corresponding to the pole and a capacity expansion area protruding relative to the pole fitting area are respectively provided, and a capacity expansion is formed on the cover plate accordingly. The cover of the area expands the cavity, thereby increasing the volume of the core body in the limited space near the pole, and increasing the battery capacity.

The specific implementation of the present disclosure will be described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the disclosure, and are not intended to limit the disclosure.

The disclosure provides a battery unit, wherein the battery unit includes a case 3, a cover plate 4, a pole 5 and a pole core, the case 3 has an opening 32, the pole core is disposed in the case 3, and the cover plate 4 seals Covering the opening 32, the cover plate 4 includes a cover plate body 42 and a cover plate expansion cavity 41 protruding outward from the cover plate body 42. The pole 5 is disposed on the cover plate body 42 and communicates with the pole core. Electrically connected, the pole core includes a pole core body 1, the pole core body 1 includes a capacity expansion terminal 11, and the capacity expansion terminal 11 is provided with a pole column adapting region 112 and a pole column matching area 112 along the pole column 5 The expansion area 111 protruding in the protruding direction, the pole adapting area 112 is recessed with respect to the expansion area 111 to form a pole installation space, the pole 5 is at least partially located in the pole installation space, and the capacity expansion area 111 is at least Partially accommodated in the cover expansion cavity 41.

In this solution, the cover plate 4 and the housing 3 together form a housing for accommodating the pole core, wherein the cover plate 4 is used to install the pole 5. The pole core includes a pole core body 1, and one end of the pole core body 1 is a capacity expansion end 11. The capacity expansion end 11 is provided with a pole fitting area 112 and a capacity expansion area 111, and the capacity expansion area 111 projects relative to the pole fitting area 112. In order to achieve capacity expansion, the space formed by the pole adaption region 112 being recessed compared to the capacity expansion region 111 is the pole installation space, and at least a part of the pole 5 is located in the pole installation space.

In the disclosure concept of this solution, the one end of the pole core mounting pole 5 is expanded, that is, the capacity expansion end. In the capacity expansion end, the area that cooperates with the pole 5 (that is, the pole adaptation area 112) is limited by the pole 5. It cannot protrude outward, and there is available space in other areas because it is not occupied by the pole 5. Therefore, the core body 1 of this part of the area is set to protrude outward, that is, the expansion area 111. The drop space formed by the expansion area 111 and the pole adaption area 112 is the pole installation space for installing the pole 5. Of course, the pole 5 can be all installed in the pole installation space or only a part of it The installation space.

In order to cooperate with the expansion end 11 of the core body 1, the cover plate 4 for mounting the pole 5 is also roughly formed into a shape corresponding to the expansion end 11, that is, a cover volume expansion cavity protruding from the inside of the cover plate 4 to the outside. 41 to accommodate at least a part of the expansion area 111, and the cover plate body 42 can be used to install the pole column 5, the cover plate body 42 corresponds to the pole column adaptation area 112, and the pole column 5 can be disposed through the cover plate body 42.

In some embodiments, the cover plate body 42 is recessed with respect to the cover plate expansion cavity 41 to form a cover plate pole space, and the pole installation space is correspondingly set to the cover plate pole space position. As shown in FIG. 3 and FIG. 4, a part of the cover plate 4 protrudes outward, thereby forming a concave cavity structure, that is, the cover volume expansion cavity 41. The unprotruded area is the cover plate body 42, and the cover plate body 42 It can cover the pole fitting area 112 of the pole core body 1, so the cover pole space formed by the cover body 42 recessed with respect to the cover expansion cavity 41 and the pole installation space are arranged corresponding to each other, and the pole 5 is at least Partly in the cover pole space.

According to an embodiment of the present disclosure, the capacity expansion terminal 11 is provided with one of the capacity expansion area 111 in the middle and two pole adaptation areas 112 on two sides of the capacity expansion area 111 respectively. As shown in FIG. 1, in the expansion end 11 of the core body 1, the expansion area 111 is disposed in the middle, and the two pole-fitting areas 112 are located on both sides, that is, the two poles corresponding to the positive and negative poles. The columns 5 are all disposed on the same expansion end 11. Correspondingly, the cover plate 4 is provided with a cover expansion space 41 in the middle and a cover body 42 on both sides. The cover body 42 is used to install two poles. Column 5.

According to an embodiment of the present disclosure, the capacity expansion end 11 is provided with three of the capacity expansion areas 111 and two of the pole adaptation areas 112, and one of the pole adaptation areas 112 is provided between two adjacent capacity expansion areas 111. . As shown in FIG. 8, FIG. 9, and FIG. 10, on the expansion end 11 having a substantially rectangular cross section, the expansion area 111 and the pole fitting area 112 are alternately arranged along the length of the cross section. Expansion areas 111 are provided on both sides of the adaptation area 112 to expand the area on both sides of the pole 5 to form three expansion areas 111, which make full use of the space not occupied by the pole 5 and expand the core body. 1 volume to achieve battery expansion.

According to an embodiment of the present disclosure, the capacity expansion end 11 is provided with one pole adaptation area 112 and two capacity expansion areas 111 located on two sides of the pole adaptation area 112 respectively. As shown in FIG. 5, FIG. 6, and FIG. 7, in the expansion end 11, the pole-adaptation area 112 can be set at a middle position, and the capacity expansion area 111 is located on both sides of the pole-adaptation area 112, that is, When the pole 5 is set in the middle position of the expansion end 11, the area on both sides of the pole 5 can be expanded and two expansion areas 111 can be set. In addition, in the pole-fitting region 112, only one pole 5 may be provided, or two poles 5 may be provided.

According to an embodiment of the present disclosure, the pole core body 1 is provided with two of the capacity expansion ends 11, and each of the capacity expansion ends 11 is provided with a pole adapting area 112. The two expanded ends 11 may be provided at different ends of the pole core body 1, for example, the pole core body 1 may be in the shape of a hexahedron, and the expanded ends 11 may be arranged at the top, side, bottom and other positions. In addition, each expansion end 11 is provided with a pole fitting area 112, that is, the two poles 5 of the battery cell are provided on different end faces of the pole core body 1. In each of these end faces, The area not occupied by the pole 5 is expanded to form a capacity expansion area 111. In addition, the core body 1 may have other shapes, such as a cylindrical shape, a hexagonal prism, or a polyhedron shape.

In some embodiments, the two expansion ends 11 are respectively located at opposite ends of the pole core body 1. As shown in FIGS. 5 to 7 and FIGS. 11 to 14, for the core body 1 having a substantially hexahedral shape, the enlarged end 11 is provided at the top and bottom ends of the core body 1, respectively. Of course, it can also be provided on two side portions facing each other.

According to an embodiment of the present disclosure, each of the expansion ends 11 is provided with one pole adaption region 112 and one expansion region 111. As shown in Fig. 11, Fig. 12, Fig. 13, Fig. 14, Fig. 15, and Fig. 16, the expansion end 11 having a substantially rectangular cross section is divided into two regions, a pole adaptation region 112 and an expansion region. 111 occupies one area, that is, the pole 5 is disposed at the edge of the expansion end 11, and the position is set as the pole adaptation area 112, and the other areas are set as the expansion area 111.

In some embodiments, the two pole adaption regions 112 are aligned or staggered from each other. In the core body 1 shown in FIGS. 11 to 13, the pole fitting regions 112 located at different expansion ends 11 are staggered from each other, and the core body 1 shown in FIGS. 14, 15, and 16 In the pole expansion regions 112 of the different expansion ends 11 are aligned with each other, these different arrangement manners reflect different installation manners of the poles 5 and are applicable to different battery structures.

In addition, the capacity expansion terminal 11 is provided with one pole adaptation area 112 and two capacity expansion areas 111 respectively located on two sides of the pole adaptation area 112. As shown in FIG. 5 to FIG. 7, the pole adaption region 112 is disposed approximately at the middle position of the expansion end 11, and both sides of the pole adaption region 112 are respectively provided with the expansion region 111, that is, the pole 5 is generally disposed In the middle position of the expansion end 11, the areas on both sides of the pole 5 can be expanded to form an expansion area 111 protruding outward.

In some embodiments, the pole-fitting regions 112 are aligned or offset from each other. The two expansion ends 11 of the pole core body 1 are opposite to each other, and the poles 5 on the two expansion ends 11 can be staggered or aligned with each other. Correspondingly, the pole adaption regions 112 can also be staggered or aligned with each other, and each pole The expansion area 111 is provided on both sides of the adaptation area 112.

In addition, the pole core includes a pole lug 2 at least partially located in the pole fitting region 112. The pole tab 2 is connected to the pole core body 1, and the pole tab 2 can be directly or indirectly electrically connected to the pole column 5. Therefore, the pole tab 2 needs to be located at least partially in the pole fitting region 112, or in the pole column. In the installation space, the pole ear 2 and the pole 5 are directly or indirectly connected. Wherein, the tab 2 may be connected to the end surface or the expansion end 11 which is not expanded.

In some embodiments, the pole tab 2 is integrally formed with the pole core body 1. The tab 2 and the core body 1 are integrally formed of a material made of the core, and the tab 2 includes two tabs as a positive electrode and a negative electrode. Of course, in other embodiments, the pole tabs 2 may also be fabricated and connected to the pole core body 1 separately. In addition, when the pole ear 2 is not connected to the pole fitting area 112, transition can be performed by the transition plate 7. One end of the transition plate 7 is electrically connected to the pole ear 2 and the other end extends to the pole fitting area 112.

In some embodiments, an inner lead-out piece 6 connected to the pole 5 is provided on the inner side of the cover plate 4, and the pole 5 is connected to the pole lug 2 through the inner lead-out piece 6. As shown in FIG. 2, an inner lead-out piece 6 is provided on the inner side of the cover body 42 of the cover plate 4, and the pole 5 can be disposed through the cover body 42 and connected to the inner lead-out piece 6, and the pole ear 2 is also connected to the inside. The lead-out piece 6 thus achieves an electrical connection with the pole 5. Wherein, the pole ear 2, the inner lead-out piece 6, and the pole post 5 are made of a conductive material.

In addition, as shown in FIG. 1, one end of the core body 1 is provided with a cooling structure adaptation area 113 and a capacity expansion area 111 protruding from the cooling structure adaptation area 113. The cooling structure adaptation area 113 is relative to the capacity expansion. The area 111 is recessed to form a cooling structure installation space. After being packaged by the casing 3 and the cover plate 4, the cooling structure installation space can accommodate a part of the cooling structure, and the cooling structure can cool the battery cells.

In addition, the disclosure also provides a battery module, wherein the battery module includes the battery unit described in the above scheme. The battery module may include a plurality of the battery cells, and the plurality of battery cells are connected in series or parallel to supply power.

In addition, the disclosure also provides an automobile, wherein the automobile includes at least one battery module according to the above solution.

The preferred embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, but the present disclosure is not limited thereto. Within the scope of the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present disclosure no longer provides various possible combinations. Explained separately. However, these simple variations and combinations should also be regarded as the content disclosed in this disclosure, which all belong to the protection scope of this disclosure.

1‧‧‧pole core body

2‧‧‧ pole

3‧‧‧ shell

4‧‧‧ cover

5‧‧‧pole

6‧‧‧ inner lead

7‧‧‧ transition board

11‧‧‧Capacity expansion

111‧‧‧Expansion area

112‧‧‧Pole Adapter

113‧‧‧ Cooling structure adaptation area

31‧‧‧ shell expansion cavity

32‧‧‧ opening

41‧‧‧ Cover expansion chamber

42‧‧‧ cover body

FIG. 1 is a perspective view of a pole core according to an embodiment of the present invention;

Figure 2 is a perspective view of a housing according to an embodiment of the present invention;

Fig. 3 is a perspective view of an outer side of a cover plate according to an embodiment of the present invention;

FIG. 4 is a perspective view of the inside of the cover according to the embodiment of the present invention;

Fig. 5 is a perspective view of a pole core according to an embodiment of the present invention;

Fig. 6 is a perspective view of a pole core according to an embodiment of the present invention;

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

Figure 8 is a perspective view of a pole core according to an embodiment of the present invention;

FIG. 9 is a perspective view of a pole core according to an embodiment of the present invention; FIG.

FIG. 10 is a cross-sectional view of a battery unit according to an embodiment of the present invention; FIG.

11 is a perspective view of a pole core according to an embodiment of the present invention;

FIG. 12 is a perspective view of a pole core according to an embodiment of the present invention; FIG.

13 is a cross-sectional view of a battery cell according to an embodiment of the present invention;

Fig. 14 is a perspective view of a pole core according to an embodiment of the present invention;

Fig. 15 is a perspective view of a pole core according to an embodiment of the present invention;

FIG. 16 is a cross-sectional view of a battery cell according to an embodiment of the present invention.

Claims (16)

A battery unit, wherein the battery unit includes a housing, a cover plate, a pole, and a pole core, the housing has an opening, the pole core is disposed in the housing, the cover plate covers the opening, and the cover The plate includes a cover plate body and a cover plate expansion cavity protruding outward relative to the cover plate body. The pole post is disposed on the cover plate body and is electrically connected to the pole core. The pole core includes a pole core body. The pole core main body includes a capacity expansion end, and the capacity expansion end is provided with a pole fitting area and a capacity expansion area protruding along the extending direction of the pole with respect to the pole fitting area, and the pole fitting area A pole installation space is formed to be recessed with respect to the capacity expansion area, the pole is located at least partially in the pole installation space, and the capacity expansion area is at least partially accommodated in the cover volume expansion cavity. The battery unit according to item 1 of the scope of patent application, wherein the cover plate body is recessed with respect to the cover plate expansion cavity to form a cover plate pole space, and the pole installation space is provided corresponding to the cover pole space position. . The battery cell according to item 1 or item 2 of the patent application scope, wherein the capacity expansion terminal is provided with one of the capacity expansion area in the middle and two pole-fitting areas respectively located on two sides of the capacity expansion area. The battery cell according to any one of claims 1 to 3 in the scope of patent application, wherein the capacity expansion terminal is provided with three capacity expansion areas and two pole adaption areas, and two adjacent capacity expansion areas are adjacent to each other. There is an adaptation area for the pole. The battery cell according to any one of claims 1 to 4 in the scope of the patent application, wherein the capacity expansion terminal is provided with one pole adaption region located in the middle and two pole adaption regions respectively. The expansion area on the side. The battery cell according to any one of claims 1 to 5, wherein the pole core body is provided with two expansion terminals, and each expansion terminal is provided with a pole adaption region. The battery cell according to item 6 of the patent application scope, wherein the two expansion ends are respectively located at opposite ends of the core body. The battery cell according to item 7 of the scope of patent application, wherein each of the expansion ends is provided with one pole adaption area and one expansion area. The battery cell according to item 8 of the scope of application for a patent, wherein two of the pole-pillar fitting regions are aligned or staggered from each other. The battery cell according to any one of items 7 to 9 of the scope of patent application, wherein the capacity expansion terminal is provided with one pole adaption area and two of the pole adaption areas respectively located on two sides of the pole adaption area. Expansion area. The battery cell according to item 10 of the patent application scope, wherein the pole-fitting regions are aligned or staggered from each other. The battery cell according to any one of claims 1 to 11 of the scope of patent application, wherein the pole core includes a pole ear located at least partly in the pole adaption region. The battery cell according to item 12 of the scope of patent application, wherein the pole tab is integrally formed with the pole core body. The battery cell according to item 12 or item 13 of the scope of patent application, wherein an inner lead-out piece connected to the pole is provided inside the cover plate, and the pole is connected to the pole through the inner lead-out piece. ear. A battery module, wherein the battery module includes the battery cell according to any one of the first to the fourteenth in the scope of patent application. An automobile, wherein the automobile includes at least one battery module according to item 15 of the scope of patent application.