Square aluminum shell battery cell structure

Abstract

The utility model discloses a square aluminum shell battery cell structure, which comprises a shell, a roll core main body, a cover plate and two caps, the shell is provided with an accommodating cavity for accommodating the main body part and an opening communicated with the accommodating cavity, the roll core main body is provided with a plurality of tabs, the cover plate is arranged at the opening of the shell, the cover plate is provided with two first through holes, and the bottom of the cover plate is a plane; the winding core further comprises a thin insulation pad, two connecting pieces and two adapting pieces, the thin insulation pad is arranged between the winding core body and the cover plate, a plurality of second through holes are formed in the thin insulation pad, third through holes are formed in the connecting pieces, the adapting pieces are arranged in the third through holes, and the caps are arranged on the connecting pieces. According to the utility model, the thin insulation pad is arranged between the roll core main body and the cover plate, so that the distance between the cover plate and the roll core main body is reduced, meanwhile, the switching piece is arranged in the connecting piece, and the tab does not occupy the space between the cover plate and the roll core main body after being bent and welded at the top end of the switching piece, so that the capacity of the roll core main body can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cores, in particular to a square aluminum shell battery core structure. Background Art

[0002] As the price of raw materials for lithium batteries continues to fall, lithium batteries are becoming more and more common. The main applications of lithium batteries are divided into power batteries and energy storage batteries. All lithium battery companies are vigorously studying ways to increase the volume energy density and mass energy density of batteries, especially power batteries, which require more power to be contained in a limited space in order to have more advantages in the market. The existing battery cell structure is to set a plastic part under the cover plate to increase the distance between the cover plate and the cell to achieve an insulation effect. This structure will reduce the capacity of the cell. Utility Model Content

[0003] The purpose of the utility model is to solve the above technical problems and provide a square aluminum shell battery core structure.

[0004] The technical solution of the utility model: a square aluminum shell battery cell structure, comprising a shell, a core body, a cover plate and two caps, the shell having a accommodating cavity for accommodating the main body and an opening connected to the accommodating cavity, a plurality of pole ears are provided on the core body, the cover plate is arranged at the opening of the shell, two first through holes are provided on the cover plate, and the bottom of the cover plate is a plane; it also includes a thin insulating pad and two connecting members and a transition piece, the thin insulating pad is arranged between the core body and the cover plate and has a plurality of second through holes thereon, the connecting member is provided with a third through hole, the connecting member is arranged on the cover plate and the first through hole is connected to the third through hole, the transition piece is arranged in the third through hole, and the cap is arranged on the connecting member.

[0005] Preferably, the connecting member is provided with two receiving plates, the receiving plates are arranged on the side walls of the third through hole, and both sides of the bottom of the adapter plate are provided with limiting grooves adapted to the receiving plates.

[0006] Preferably, the cover plate is provided with a first step groove adapted to the connecting piece.

[0007] Preferably, the connecting piece is provided with a second step groove matched with the cover cap.

[0008] Preferably, a third step groove is provided on the connecting member.

[0009] The beneficial effect of the utility model is as follows: in the utility model, a thin insulating pad is provided between the core body and the cover plate, and the bottom of the cover plate is a plane, thereby reducing the distance between the cover plate and the core body, and at the same time, the adapter is arranged in the connecting piece, and the connecting piece is arranged on the cover plate and the bottom is flush with the bottom of the cover plate. After the pole ear is bent and welded to the top of the adapter, it does not occupy the space between the cover plate and the core body, thereby increasing the capacity of the core body, and this structure facilitates the pole ear to directly pass through the third through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is an exploded view of the overall structure of the preferred embodiment of the utility model;

[0011] Figure 2 It is a cross-sectional view of a preferred embodiment of the utility model;

[0012] Figure 3 yes Figure 2 A partial enlarged view of the middle part;

[0013] Figure 4 It is a three-dimensional diagram of the cover plate in the preferred embodiment of the utility model;

[0014] Figure 5 It is a three-dimensional diagram of a connecting member in a preferred embodiment of the utility model;

[0015] Figure 6 This is a three-dimensional diagram of the cover plate and the connecting piece in the preferred embodiment of the utility model;

[0016] Figure 7 It is a three-dimensional diagram of the adapter in the preferred embodiment of the utility model.

[0017] Figure markings: shell 10, winding core body 2, pole ear 201, cover plate 3, first through hole 301, first step groove 302, cap 4, thin insulating pad 5, second through hole 501, connecting piece 6, third through hole 601, receiving plate 602, second step groove 603, third step groove 604, adapter plate 7, limiting groove 701. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Reference Figures 1 to 7, a square aluminum shell battery cell structure, comprising a shell 10, a core body 2, a cover plate 3 and two caps 4, the shell 10 having a housing cavity for accommodating the main body and an opening communicating with the housing cavity, a plurality of pole ears 201 being provided on the core body 2, the cover plate 3 being arranged at the opening of the shell 10, the cover plate 3 being provided with two first through holes 301, and the bottom of the cover plate 3 being a plane; further comprising a thin insulating pad 5 and two connectors 6 and a transfer sheet 7, the thin insulating pad 5 being arranged between the core body 2 and the cover plate 3 and being provided with a plurality of second through holes 501, the connector 6 being provided with a third through hole 601, the connector 6 being arranged on the cover plate 3 and the first through hole 301 being communicated with the third through hole 601, the transfer sheet 7 being arranged in the third through hole 601, and the cap 4 being arranged on the connector 6. In the utility model, the bottom of the cover plate 3 is a plane, and the cover plate 3 is arranged at the opening of the shell 10. A thin insulating pad 5 is arranged between the core body 2 and the cover plate 3, and the thickness of the thin insulating pad 5 is 0.8 mm, which reduces the distance between the cover plate 3 and the core body 2, thereby increasing the capacity of the core body 2. At the same time, the thin insulating pad 5 plays an insulating role. After the pole ear 201 passes through the second through hole 501 and the cover plate 3 is installed, the pole ear 201 then passes through the first through hole 301 and the third through hole 601 in turn, and the adapter 7 is welded in the third through hole 601 on the connecting piece 6, and then the pole ear 201 is bent and welded on the adapter 7. This method facilitates the pole ear 201 to pass directly through the third through hole 601, and after the connecting piece 6 and the adapter 7 are installed, their bottoms are parallel to the bottom of the cover plate 3, and the pole ear 201 is bent and then welded to the top of the adapter 7, without occupying the space between the cover plate 3 and the core body 2. Specifically, the winding core body 2 includes a first winding core and a second winding core, both of which are provided with a positive electrode ear and a negative electrode ear; the cap 4 is welded on the connecting member 6 to seal the third through hole 601.

[0020] As a preferred embodiment of the utility model, it may also have the following additional technical features:

[0021] In this embodiment, two receiving plates 602 are provided on the connecting member 6, and the receiving plates 602 are arranged on the side walls of the third through hole 601. Limiting grooves 701 that are compatible with the receiving plates 602 are provided on both sides of the bottom of the adapter plate 7. After the receiving plates 602 cooperate with the limiting grooves 701, they can limit the movement of the adapter plate 7 in one direction within the third through hole 601, so as to facilitate the welding of the adapter plate 7 on the connecting member 6.

[0022] In this embodiment, the cover plate 3 is provided with a first step groove 302 adapted to the connecting member 6. After the connecting member 6 is matched with the first step groove 302, it is prevented from moving, which facilitates subsequent welding.

[0023] In this embodiment, the connecting member 6 is provided with a second step groove 603 matched with the cover cap 4. After the cover cap 4 is matched with the second step groove 603, it is prevented from moving, which facilitates subsequent welding.

[0024] In this embodiment, a third step groove 604 is provided on the connecting member 6 to make the bottom space of the connecting member 6 larger, making it convenient for personnel to place the adapter plate 7 on the receiving plate 602 .

[0025] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A square aluminum shell battery core structure, comprising a shell (10), a winding core body (2), a cover plate (3) and two caps (4), wherein the shell (10) has a receiving cavity for receiving a main body and an opening communicating with the receiving cavity, the winding core body (2) is provided with a plurality of pole ears (201), the cover plate (3) is arranged at the opening of the shell (10), and the cover plate (3) is provided with two first through holes (301), characterized in that: The bottom of the cover plate (3) is a plane; it also includes a thin insulating pad (5) and two connecting pieces (6) and a transfer piece (7), wherein the thin insulating pad (5) is arranged between the winding core body (2) and the cover plate (3) and is provided with a plurality of second through holes (501), the connecting piece (6) is provided with a third through hole (601), the connecting piece (6) is arranged on the cover plate (3) and the first through hole (301) is communicated with the third through hole (601), the transfer piece (7) is arranged in the third through hole (601), and the cover cap (4) is arranged on the connecting piece (6).

2. A square aluminum shell battery cell structure according to claim 1, characterized in that: The connecting member (6) is provided with two receiving plates (602), and the receiving plates (602) are arranged on the side walls of the third through hole (601). Both sides of the bottom of the adapter plate (7) are provided with limiting grooves (701) adapted to the receiving plates (602).

3. A square aluminum shell battery core structure according to claim 1, characterized in that: The cover plate (3) is provided with a first step groove (302) adapted to the connecting member (6).

4. The square aluminum shell battery cell structure according to claim 1, characterized in that: The connecting piece (6) is provided with a second step groove (603) adapted to the cover cap (4).

5. The square aluminum shell battery cell structure according to claim 1, characterized in that: The connecting member (6) is provided with a third step groove (604).

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