CN211556063U - Quick film-coating structure for multiple square lithium batteries - Google Patents

Abstract

The utility model relates to a rapid coating structure for a plurality of square lithium batteries, which comprises a battery case, the battery case is covered with an integrally formed PET insulating protective film, and the PET insulating protective film comprises a PET base film and a uniform coating film. The insulating adhesive covering it, the PET base film includes a plurality of T-shaped structures, the plurality of T-shaped structures are connected end to end, the T-shaped structure includes a head and a tail, and the center of the head is provided with a front folded sheet, so the The upper and lower sides of the front folded sheet are symmetrically provided with side folded sheets, the tail portion includes a central plane and a rear folded sheet, and the central plane is connected with the front folded sheet. On the premise of providing protection to the square lithium battery casing, the utility model further reduces the amount of raw materials used and the material cost; simplifies the coating process, can cover multiple lithium batteries at one time, improves production efficiency, and reduces equipment and labor costs .

Description

A rapid coating structure of multiple square lithium batteries

technical field

The utility model relates to the technical field of square lithium battery manufacturing, in particular to a rapid coating structure of a plurality of square lithium batteries.

Background technique

At present, the outer casing of the lithium-ion power battery is an aluminum casing made of aluminum or a steel casing made of stainless steel. Whether it is a steel shell or an aluminum shell, their shell walls are very thin, so the wear resistance and deformation resistance are poor, especially in the battery preparation process, the shell needs to undergo spot welding, laser welding, liquid injection, cleaning , chemical composition, and many other operating procedures, and each process requires the use of a clamp to fix the battery case to complete various process operations, which will cause varying degrees of damage to the surface of the case, resulting in pits and scratches on the surface. Therefore, the battery casing needs to be coated, and the coating can protect the battery to a certain extent.

The Chinese patent with the patent publication number CN206322806U discloses a power battery casing envelope structure. There are 4 incisions on both sides of the middle of the square diaphragm, forming 2 folded sheets, and the 2 folded sheets cover both sides of the battery casing. At the bottom corner of the battery, the square diaphragm will form a superposition phenomenon on the side of the battery, which will affect the overall size of the battery, thereby affecting the battery capacity density. In addition, this coating structure method can only be used for coating a single battery, and the overall production efficiency is low, which increases the cost.

Utility model content

The purpose of the present utility model is to overcome the above-mentioned deficiencies, and to provide a rapid coating structure for a plurality of square lithium batteries. On the premise of providing protection to the casing of the square lithium battery, the amount of raw materials used and the cost of materials are further reduced; and the coating is simplified. It can cover multiple lithium batteries at one time, improve production efficiency and reduce equipment and labor costs.

The purpose of this utility model is achieved in this way:

A rapid film-wrapping structure for multiple square lithium batteries, comprising a battery case, the battery case is covered with an integrally formed PET insulating protective film, and the PET insulating protective film includes a PET base film and a uniformly coated PET insulating protective film. Insulating adhesive, the PET base film includes a plurality of T-shaped structures, the plurality of T-shaped structures are connected end to end, the T-shaped structure includes a head and a tail, and the center of the head is provided with a front folded piece, the front folded The upper and lower sides of the sheet are symmetrically provided with side folded pieces, the tail portion includes a center plane and a rear folded piece, and the center plane is connected with the front folded piece.

Preferably, the plurality of T-shaped structures are punched and formed at one time.

The beneficial effects of the present utility model are:

On the premise of providing protection to the square lithium battery case, the utility model further reduces the amount of raw materials used and the material cost; simplifies the coating process, can cover multiple lithium batteries at one time, improves production efficiency, and reduces equipment and labor costs .

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

2-6 are schematic diagrams of the coating process of the present invention.

Among them: T-shaped structure 1; head 1.1; front folded piece 1.1.1; side folded piece 1.1.2; tail 1.2; center plane 1.2.1; rear folded piece 1.2.2.

Detailed ways

A rapid film-wrapping structure for multiple square lithium batteries, comprising a battery case, the battery case is covered with an integrally formed PET insulating protective film, and the PET insulating protective film includes a PET base film and a uniformly coated PET insulating protective film. Insulating adhesive, the PET base film includes a plurality of T-shaped structures 1 formed by punching, and two adjacent T-shaped structures 1 are connected end to end. The T-shaped structures 1 include a head 1.1 and a tail 1.2, and the center of the head is There is a front folded piece 1.1.1, the upper and lower sides of the front folded piece 1.1.1 are symmetrically provided with a side folded piece 1.1.2, and the tail portion 1.2 includes a center plane 1.2.1 and a rear folded piece 1.2.2, The central plane 1.2.1 is connected to the front flap 1.1.1.

A rapid coating method for multiple square lithium batteries, using the above structure, includes the following steps:

Step 1: Punch out three continuous T-shaped structures 1 from the rectangular PET base film;

Step 2, place the PET base film flat on the worktable, with the side coated with insulating glue facing upward, and place a plurality of square lithium batteries on the center surface of the PET base film according to a certain distance;

Step 3, wrapping the front folded sheet of the first T-shaped structure and the rear folded sheet of the last T-shaped structure on the outer sides of the first and last batteries;

Step 4: Push the first and last two batteries to move inward, and the PET base film gradually covers the inner sides of the first and last lithium batteries and the two sides of other lithium batteries;

Step 5. After the wrapping is completed, wrap the side flaps of the T-shaped structure head to wrap all the small sides of the battery in turn;

Step 6. After all the coating is completed, a connecting row is installed on the top pole area of the square lithium battery, and the batteries are connected in series and parallel to form a battery pack.

Example 1:

As shown in Figure 1-6, this embodiment is described by taking three square lithium batteries as an example:

Step 1, as shown in Figure 1, three continuous T-shaped structures 1 are punched out of the rectangular PET base film. The T-shaped structure 1 includes a head 1.1 and a tail 1.2, and the center of the head is provided with a front folded sheet 1.1 .1, the upper and lower sides of the front folded sheet 1.1.1 are symmetrically provided with side folded sheets 1.1.2, and the tail portion 1.2 includes a central plane 1.2.1 and a rear folded sheet 1.2.2, the central plane 1.2. 1 Connect with the front flap 1.1.1.

Step 2: As shown in Figure 2, place the punched PET base film flat on the workbench, with the side coated with insulating glue facing upwards. Take three square lithium batteries, and place the bottom surfaces of the three batteries on the three central surfaces 1.2.1 of the PET base film respectively, so that the PET base film first coats the bottom surface of the square lithium battery.

Step 3: As shown in Figure 3, wrap the front folded sheet 1.1.1 of the first T-shaped structure and the rear folded sheet 1.2.2 of the third T-shaped structure on the outer sides of the first and rear batteries Fold it up to cover the outer sides of the first and last square lithium batteries.

Step 4. As shown in Figure 4, push the two square lithium batteries at the head and the tail to the inside, so that the front and rear folded sheets on the inner side of the base film between the batteries are gradually arched upward, and gradually cover the inner side of the square lithium battery at the head and the tail and the middle battery. The two large sides of , the results are shown in Figure 5.

Step 5. On the basis of Step 4, cover the small sides of the square lithium battery with the six side folded sheets 1.1.2 of the PET insulating protective film in turn, and the result is shown in Figure 6.

Step 6. The three square lithium batteries have been quickly coated, and the finished product can be used as a module for PACK assembly.

In addition, the finished product shown in Figure 6 can be cut along the gap between the batteries, and the PET insulating protective film can be cut, which can be converted into three independent square lithium batteries with film.

In addition to the above-mentioned embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the claims of the present invention.

Claims (2)

1. The utility model provides a quick diolame structure of a plurality of square lithium cells which characterized in that: the battery shell is externally coated with an integrally formed PET (polyethylene terephthalate) insulating protective film, the PET insulating protective film comprises a PET base film and insulating glue uniformly coated on the PET base film, the PET base film comprises a plurality of T-shaped structures (1), two adjacent T-shaped structures (1) are connected end to end, each T-shaped structure (1) comprises a head (1.1) and a tail (1.2), a front turning folding piece (1.1.1) is arranged at the center of the head, side turning folding pieces (1.1.2) are symmetrically arranged on the upper and lower sides of the front turning folding piece (1.1.1), each tail (1.2) comprises a central plane (1.2.1) and a rear turning folding piece (1.2.2), and the central plane (1.2.1) is connected with the front turning folding pieces (1.1.1).

2. The rapid coating structure of a plurality of square lithium batteries according to claim 1, wherein: and the plurality of T-shaped structures are formed by one-time punching.

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