CN202585659U - Flexible-packaging winding-type battery structure - Google Patents

Abstract

The utility model belongs to the technical field of lithium-ion batteries, in particular to a soft-packed winding-type irregular battery structure with convenient operation and easy realization, which comprises two electric cores connected in series with a winding structure, and the two electric cores are packaged in the same packaging film. Compared with the prior art, the utility model has the beneficial effect of connecting two electric cores with different sizes and positions in series, the internal and external order of the cathode and anode is reversed when winding, and the two electric cores are packaged in the same packaging film In order to realize the lithium-ion battery structure with an irregular overall structure in order to meet the diversified and personalized requirements of portable devices for battery shapes. The utility model develops the prior art, organically combines the existing battery structures, and realizes the irregular structure of the battery. In addition, the battery structure of the utility model is flexible in design, and the relative position and size of the two battery cells can be adjusted as required to obtain the required irregular battery cells.

Description

Flexible packaging winding battery structure

technical field

The utility model belongs to the technical field of lithium ion batteries, in particular to a soft-packed winding irregular battery structure with convenient operation and easy realization.

Background technique

Lithium-ion batteries have been widely used in portable devices due to their high energy density, high average open circuit voltage, and long cycle life. With the continuous development of portable devices, people have put forward new requirements for lithium-ion batteries. In addition to the continuous improvement in performance, the structure is also constantly changing. In particular, the space reserved for battery placement by some portable devices is irregular in shape. Traditional batteries are mostly rectangular or cylindrical, which is difficult to meet the needs of these irregular shapes. Therefore, it is necessary to provide a battery that is easy to operate and easy to implement. batteries with irregular structures.

Lithium-ion batteries generally include hard-shell lithium-ion batteries and soft-package lithium-ion batteries. Soft-package lithium-ion batteries have the characteristics of good safety performance, small thickness, light weight, and flexible shape design. Therefore, soft-package lithium-ion batteries are used to achieve different Regularly shaped battery structures are advantageous. The production process of flexible packaging lithium-ion batteries generally includes a winding process and a stacking process. Among them, the winding process has the advantages of high production efficiency, high pass-through rate, and good battery consistency.

In view of this, it is indeed necessary to provide a soft package wound irregular battery structure that is easy to operate and easy to realize.

Utility model content

The purpose of the utility model is: aiming at the deficiencies of the prior art, to provide a soft package winding lithium ion battery structure which is easy to operate and easy to realize irregular structure.

In order to achieve the above object, the utility model adopts the following technical solutions:

The soft-packed wound battery structure includes two series-connected electric cores with a wound structure, and the two electric cores are packaged in the same packaging film.

As an improvement of the structure of the flexible package wound battery of the utility model, the two batteries mentioned above are batteries with different sizes.

As an improvement of the structure of the flexible package wound battery of the utility model, the two battery cells are stacked in parallel. The parallel stacking means that the cells with small size are stacked in the plane of the cells with large size, and the directions of the tabs of the two cells are kept parallel.

As an improvement of the structure of the flexible package wound battery of the utility model, the two batteries described above are rectangular parallelepipeds.

As an improvement of the structure of the flexible package winding battery of the utility model, the packaging film is an aluminum-plastic composite film or a stainless steel composite film.

As an improvement of the utility model's flexible packaging winding battery structure, the aluminum-plastic composite film is a three-layer structure of nylon/aluminum foil/polypropylene (PP).

As an improvement of the utility model's flexible packaging winding battery structure, the stainless steel composite film is a nylon/stainless steel/polypropylene (PP) three-layer structure.

Compared with the prior art, the utility model has the beneficial effect of connecting two electric cores with different sizes and positions in series, the internal and external order of the cathode and anode is reversed when winding, and the two electric cores are packaged in the same packaging film In order to realize the lithium-ion battery structure with an irregular overall structure in order to meet the diversified and personalized requirements of portable devices for battery shapes. The utility model develops the prior art, organically combines the existing battery structures, and realizes the irregular structure of the battery. In addition, the battery structure of the utility model is flexible in design, and the relative position and size of the two battery cells can be adjusted according to the needs to obtain the required irregular battery cells. The operation is simple and easy to implement.

Description of drawings

Fig. 1 is the front view of embodiment 1 and embodiment 2 of the present utility model;

Fig. 2 is the structural representation after the packaging bag is torn open in Embodiment 1 of the utility model;

Fig. 3 is a schematic diagram of the structure of the second embodiment of the utility model after tearing the packaging bag.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Specific implementation mode 1

See Fig. 1 and Fig. 2, the structure of the soft-packed winding battery includes two battery cells 11 and 12 connected in series. The cells 11 and 12 are cuboids with different sizes. It is packaged in the same packaging film 2 as the electric core 12, and the packaging film 2 is an aluminum-plastic composite film. The cathode and anode of the battery cell 11 and the battery cell 12 are wound in the opposite order inside and outside, and connected in series by welding. In the specific implementation process, the cathode and anode current collectors of the battery cell 11 and the battery cell 12 are at the winding end position The tabs 3 are fabricated and welded correspondingly so that the battery cells 11 and 12 are stacked together to realize a structural battery with an irregular overall structure.

Specific implementation mode 2

See Fig. 1 and Fig. 3, another kind of flexible packaging winding battery structure, including two battery cells 11 and 12 connected in series, the size of the battery cells 12 and the relative position of parallel stacking are different from the specific embodiment 1. The electric core 11 and the electric core 12 are cuboids with different sizes, and the electric core 11 and the electric core 12 are packaged in the same packaging film 2, and the packaging film 2 is a stainless steel composite film. The cathode and anode of the battery cell 11 and the battery cell 12 are wound in the opposite order inside and outside, and connected in series by welding. In the specific implementation process, the cathode and anode current collectors of the battery cell 11 and the battery cell 12 are at the winding end position The tabs 3 are fabricated and welded accordingly, so that the cells 11 and 12 are stacked together, and the overall structure is a battery with an irregular structure.

Of course, the utility model can also be configured with different positions of the electric cores according to needs, and select electric cores of different sizes to be packaged in the same packaging film.

According to the disclosure and teaching of the above specification, those skilled in the art to which the present utility model belongs can also make appropriate changes and modifications to the above embodiment. The utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.

Claims (7)

1. flexible package coiled battery structure, it is characterized in that: comprise the electric core with winding-structure of two series connection, described two electric cores are packaged in the same packaging film.

2. flexible package coiled battery structure according to claim 1 is characterized in that: described two electric cores are the different electric core of size.

3. flexible package coiled battery structure according to claim 2 is characterized in that: described two electric core stacked in parallel.

4. flexible package coiled battery structure according to claim 3 is characterized in that: described two electric cores are cuboid.

5. flexible package coiled battery structure according to claim 1 is characterized in that: described packaging film is aluminum-plastic composite membrane or the compound film of stainless steel.

6. flexible package coiled battery structure according to claim 5 is characterized in that: described aluminum-plastic composite membrane is nylon/aluminium foil/polypropylene (PP) three-decker.

7. flexible package coiled battery structure according to claim 5 is characterized in that: the compound film of described stainless steel is nylon/stainless steel/polypropylene (PP) three-decker.

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