CN216354586U

CN216354586U - Secondary battery and battery module

Info

Publication number: CN216354586U
Application number: CN202122913935.7U
Authority: CN
Inventors: 周梦; 陈英旗; 曹楷; 侯敏; 曹辉
Original assignee: Shanghai Ruipu Energy Co Ltd
Current assignee: Shanghai Ruipu Energy Co Ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-04-19
Anticipated expiration: 2031-11-25

Abstract

The utility model provides a secondary battery and a battery module, wherein the secondary battery comprises a shell and an insulating element; the insulating element is coated outside the shell and is provided with a hollowed-out area, so that the fixing capacity of the secondary battery is improved, the bonding area and the bonding strength are effectively improved, the grouped overall strength and the capacity of resisting external impact of the secondary battery are improved, and the safety of the battery is further improved.

Description

Secondary battery and battery module

Technical Field

The utility model belongs to the technical field of power batteries, and particularly relates to a secondary battery and a battery module.

Background

In recent years, with the implementation of policies of environmental protection and energy conservation and emission reduction, new energy automobiles have not been developed before. With the development of pure electric vehicles, the requirements of the entire vehicle on the energy density, the space utilization rate and the safety and reliability cost of a battery system are higher and higher, and a part of the energy density, the space utilization rate and the safety and reliability of the battery system is reflected on a battery module, so that the high energy density, the space utilization rate, the safety and reliability and the low cost of the battery module are inevitable.

The secondary power battery module is characterized in that a plurality of single battery cores are connected in series and parallel to form a power supply through conductive connecting pieces, and the power supply is fixed at a designed position through a process and a structure to cooperatively play the functions of charging, discharging and storing electric energy. The basic functions of the module are connection, fixation and safety protection. However, it is not easy to ensure the reliable electrical connection and contact of the secondary power battery module, because the electrical connection of the secondary power battery module is closely related to a plurality of single battery cells, connecting devices, connection modes, connection processes, connection materials, etc. to be connected, the connection reliability not only depends on the parameters of the connecting devices, such as materials, structures, geometric dimensions, etc., but also directly affects the connection reliability due to atmospheric pollution, such as dust, corrosive gases, humidity, and temperature, at the electrical connection points. The current in the secondary power battery module is in the electric connection position conduction process, and various random factors all will influence the reliability of electric connection, all can cause the unreliable of electric connection contact like electric current heat effect, electrodynamic force, external atmospheric pollution, temperature, humidity influence and electromagnetic interference etc. consequently, need connect and consolidate between the monomer electric core, require that the utmost point post contact resistance of connection piece and battery is little, anti-vibration, firm degree height.

At present, a layer of blue film is covered on the outer surface of an aluminum shell of the power battery to insulate the surface of a battery core from the outside. But the film may have insufficient overall bonding strength after use due to poor bonding strength with the glue.

Therefore, it is necessary to provide a new connection method to increase the connection strength between the battery cells, thereby improving the overall connection strength.

SUMMERY OF THE UTILITY MODEL

In view of the disadvantages of the prior art, an object of the present invention is to provide a secondary battery and a battery module having high overall strength, high external impact resistance, and high battery safety.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an object of the present invention is to provide a secondary battery including a case and an insulating member; the shell comprises a first side part and a second side part which are oppositely arranged, the insulating element covers the outer part of the shell, a hollow-out area is arranged on the insulating element, so that the first side part and the second side part are provided with areas which are not covered by the insulating element, and the areas which are not covered by the insulating element are used for being fixed with a separator between adjacent secondary batteries.

As one technical solution of the present invention, the areas of the hollowed-out areas located on the first side portion and the second side portion are respectively smaller than or equal to the area of the spacer.

As an embodiment of the present invention, the hollow area on the first side and the outer contour of the first side of the housing form a zigzag structure.

As one technical solution of the present invention, the hollow area on the second side portion and the outer contour of the second side portion of the housing form a zigzag structure.

As one technical solution of the present invention, the hollow areas located on the first side portion and the second side portion are centrally disposed.

As one technical solution of the present invention, the shape of the hollow area located on the first side and the second side is rectangular, square, circular or rhombic.

As one mode of the present invention, the region of the first side portion and the second side portion not covered with the insulating member and the separator between the adjacent secondary batteries are fixed by adhesion.

Another object of the present invention is to provide a battery module including at least one of the secondary batteries, wherein the secondary batteries are arranged in series, and a separator is provided between the secondary batteries, and a region of the first side portion and the second side portion of the secondary battery not covered with the insulating member is adhesively fixed to an adjacent separator.

As one technical solution of the present invention, end plates are respectively disposed at both ends of the battery module, and a separator is disposed between the end plates and the secondary battery.

As one aspect of the present invention, a region of the first and second side portions of the secondary battery not covered with the insulating member is adhesively fixed to a spacer between end plates.

Compared with the prior art, the utility model has the beneficial effects that:

according to the secondary battery and the battery module, the hollow area is arranged on the insulating element on the secondary battery, and the separator is bonded with the exposed battery shell of the hollow area by using glue, so that the bonding area and the bonding strength are effectively improved, the overall strength and the external impact resistance of the secondary battery and the battery module are improved, and the safety of the battery is further improved.

Drawings

Fig. 1 is a structural view of a secondary battery and a battery module according to the present invention;

among them, 1-secondary battery; 2-an insulating element; 3-a hollow-out area; 4-a spacer.

Detailed Description

It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

In one embodiment, the present invention provides a secondary battery and a battery module, as shown in fig. 1, the secondary battery 1, including a case and an insulating member 2; the housing comprises a first side part and a second side part which are oppositely arranged, the insulating element 2 is wrapped outside the housing, a hollow-out area 3 is arranged on the insulating element 2, so that the first side part and the second side part are provided with areas which are not covered by the insulating element, and the areas which are not covered by the insulating element are used for fixing with a separator 4 between adjacent secondary batteries 1.

The present embodiment provides a hollowed-out region 3 for fixing with a spacer 4 between adjacent secondary batteries 1, in the secondary battery 1, the insulating member 2 on the first side and/or the second side; the bonding area and the bonding strength are effectively improved, so that the overall strength and the external impact resistance of the secondary battery 1 are improved, and the safety of the battery is improved.

Further, the areas of the hollowed-out areas 3 at the first side and the second side are respectively smaller than or equal to the area of the spacer 4.

Further, the hollow area 3 on the first side and the outer contour of the first side of the housing form a zigzag structure.

Further, the hollow area 3 on the second side portion and the outer contour of the second side portion of the housing form a zigzag structure.

Further, the hollow areas 3 located at the first side portion and the second side portion are centrally disposed.

Further, the shape of the hollow area 3 at the first side and the second side is rectangle, square, circle or diamond.

Further, the region of the first side portion and the second side portion not covered with the insulating member and the separator 4 between the adjacent secondary batteries 1 are fixed by adhesion.

The battery module of the present embodiment includes at least two secondary batteries 1, the secondary batteries 1 are sequentially arranged, a separator 4 is disposed between the secondary batteries 1, and the regions of the first side and the second side of the secondary batteries not covered by the insulating member are bonded and fixed to the adjacent separator 4.

Further, end plates are respectively arranged at two ends of the battery module, and a separator 4 is arranged between each end plate and the secondary battery 1.

Further, the regions of the first and second side portions of the secondary battery 1 not covered with the insulating member and the separator 4 between the end plates are adhesively fixed.

The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.

Claims

1. A secondary battery, comprising a case and an insulating member; the shell comprises a first side part and a second side part which are oppositely arranged, the insulating element covers the outer part of the shell, a hollow-out area is arranged on the insulating element, so that the first side part and the second side part are provided with areas which are not covered by the insulating element, and the areas which are not covered by the insulating element are used for being fixed with a separator between adjacent secondary batteries.

2. The secondary battery according to claim 1, wherein areas of the hollowed-out regions at the first side and the second side are respectively smaller than or equal to an area of the separator.

3. The secondary battery of claim 1, wherein the hollowed-out area on the first side forms a zigzag structure with an outer contour of the first side of the housing.

4. The secondary battery of claim 1, wherein the hollowed-out area on the second side forms a zigzag structure with an outer contour of the second side of the housing.

5. The secondary battery according to claim 1, wherein a hollowed-out area at the first side and the second side is centrally disposed.

6. The secondary battery according to claim 1, wherein the shape of the hollowed-out area at the first side and the second side is a rectangle, a square, a circle, or a diamond.

7. The secondary battery according to claim 2, wherein a region of the first side portion and the second side portion not covered with the insulating member and a separator between adjacent secondary batteries are fixed by adhesion.

8. A battery module comprising at least two secondary batteries according to any one of claims 1 to 7, wherein the secondary batteries are arranged in series, and wherein a separator is provided between the secondary batteries, and wherein a region of the first side portion and the second side portion of the secondary battery not covered with the insulating member is adhesively fixed to an adjacent separator.

9. The battery module according to claim 8, wherein end plates are provided at both ends of the battery module, respectively, and a separator is provided between the end plates and the secondary battery.

10. The battery module according to claim 9, wherein regions of the first and second side portions of the secondary battery not covered with the insulating member are adhesively fixed to the spacers between the end plates.