Lithium battery insulating flame-retardant film

Abstract

The utility model provides an insulating flame-retardant film for a lithium battery. The insulating flame-retardant film comprises a base layer; the first buffer pads are respectively arranged at the top and the bottom of the base layer; the buffer reinforcing layers are respectively arranged at the top and the bottom of the base layer; the flame-retardant layer is arranged on one side of the buffer reinforcing layer; the arc-shaped sleeve is fixedly connected to one side of the flame-retardant layer, a partition plate is fixedly installed on the inner side face of the arc-shaped sleeve, a second buffering cushion is arranged on the inner side face of the arc-shaped sleeve, and the first buffering cushion is in an equilateral triangle shape. According to the lithium battery insulating flame-retardant film provided by the utility model, the arc-shaped sleeve, the partition plate, the second buffer pad and other structures are matched with one another, so that when the lithium battery insulating flame-retardant film is used, after the flame-retardant film is cut, gas in the arc-shaped sleeve cannot flow out, and the buffer effect cannot be influenced.

Description

Technical Field

[0001] The utility model relates to the field of lithium batteries, in particular to an insulating flame-retardant film for lithium batteries. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as positive and negative electrode materials and uses non-aqueous electrolyte solutions. In order to prevent the external metal from contacting the outer wall of the battery during charging and causing a short circuit, a layer of insulating flame-retardant PC film needs to be wrapped around the periphery of the lithium battery.

[0003] A flame-retardant PC film in the prior art comprises wear-resistant strips and right-angled hollow spaces. When the PC film is fitted, the size and shape of the battery is adjusted and wrapped around the outer layer of the battery. When wrapping, the wear-resistant strips are fitted correspondingly to the edges of the battery. When the wear-resistant strips are fitted to cover the edges of the battery, the right-angled hollow spaces can be perfectly clamped and fixed with the right-angled edges of the battery. The wear-resistant strips thicken the thickness of the film layer at the edges of the battery, and provide thickening protection between the PC film and the sharp edges of the battery to prevent the PC film from being cut and broken. The right-angled hollow spaces inside the wear-resistant strips covering the surface of the battery form air chambers, which can play a good buffering role when the battery is impacted.

[0004] However, when the PC film is used, in order to wrap lithium batteries of different sizes, the PC film needs to be cut. This will easily cause gas loss inside the right-angle bin during use, thus affecting the buffering effect.

[0005] Therefore, it is necessary to provide a lithium battery insulating flame retardant film to solve the above technical problems. Utility Model Content

[0006] The utility model provides a lithium battery insulating flame-retardant film, which solves the problem that when a PC film is cut, gas leakage is easily caused, thereby affecting the buffer effect.

[0007] In order to solve the above technical problems, the utility model provides a lithium battery insulating flame retardant film, comprising:

[0008] Grassroots;

[0009] a first buffer pad, the first buffer pad being respectively arranged on the top and the bottom of the base layer;

[0010] Buffer reinforcement layers, the buffer reinforcement layers are respectively arranged on the top and bottom of the base layer;

[0011] A flame retardant layer, the flame retardant layer being arranged on one side of the buffer reinforcement layer;

[0012] An arc-shaped sleeve, wherein the arc-shaped sleeve is fixedly connected to one side of the flame-retardant layer, a partition is fixedly installed on the inner side surface of the arc-shaped sleeve, and a second buffer pad is arranged on the inner side surface of the arc-shaped sleeve.

[0013] Preferably, the first buffer pad is in the shape of an equilateral triangle, and the internal angle of the first buffer pad is ninety degrees.

[0014] Preferably, the buffer reinforcement layer is arranged on the outer side of the first buffer pad.

[0015] Preferably, a plurality of the first buffer pads are provided and are evenly distributed on the top and bottom of the base layer.

[0016] Preferably, a plurality of the partitions and a plurality of the second buffer pads are provided.

[0017] Preferably, the second buffer pad is arranged on one side of the partition.

[0018] Preferably, a plurality of protrusions are fixedly mounted on the outer side surface of the arc-shaped sleeve.

[0019] Compared with the related art, the lithium battery insulating flame retardant film provided by the utility model has the following advantages:

[0020] Beneficial effects:

[0021] The utility model provides a lithium battery insulating flame retardant film, which cooperates with each other through structures such as an arc sleeve, a partition and a second buffer pad. When in use, after the flame retardant film is cut, the gas inside the arc sleeve will not flow out, thereby affecting the buffering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a first embodiment of a lithium battery insulating flame-retardant film provided by the utility model;

[0023] Figure 2 for Figure 1 The schematic diagram of the side cross-sectional structure of the arc sleeve shown;

[0024] Figure 3 This is a structural schematic diagram of a second embodiment of a lithium battery insulating flame-retardant film provided by the utility model.

[0025] Numbers in the figure: 1, base layer, 2, first buffer pad, 3, buffer reinforcement layer, 4, flame retardant layer, 5, arc sleeve, 51, partition, 52, second buffer pad, 6, bump. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0027] First embodiment

[0028] Please refer to Figure 1 , Figure 2 ,in, Figure 1 A schematic structural diagram of a first embodiment of a lithium battery insulating flame-retardant film provided by the utility model; Figure 2 for Figure 1 The side cross-sectional structure diagram of the arc sleeve is shown. A lithium battery insulating flame retardant film comprises: a base layer 1;

[0029] A first buffer pad 2, wherein the first buffer pad 2 is respectively arranged on the top and the bottom of the base layer 1;

[0030] A buffer reinforcement layer 3, wherein the buffer reinforcement layer 3 is respectively arranged on the top and bottom of the base layer 1;

[0031] A flame retardant layer 4, wherein the flame retardant layer 4 is disposed on one side of the buffer reinforcement layer 3;

[0032] The arc-shaped sleeve 5 is fixedly connected to one side of the flame-retardant layer 4 , a partition plate 51 is fixedly installed on the inner side surface of the arc-shaped sleeve 5 , and a second buffer pad 52 is arranged on the inner side surface of the arc-shaped sleeve 5 .

[0033] The first buffer pad 2 is in the shape of an equilateral triangle, and the internal angle of the first buffer pad 2 is ninety degrees.

[0034] The buffer reinforcement layer 3 is disposed on the outer side of the first buffer pad 2 .

[0035] A plurality of first buffer pads 2 are provided and are evenly distributed on the top and bottom of the base layer 1 .

[0036] A plurality of the partition plates 51 and the second buffer pads 52 are provided.

[0037] The second buffer pad 52 is disposed on one side of the partition plate 51 .

[0038] The base layer 1 is an insulating film substrate layer, and a buffer reinforcement layer 3 is fixedly connected to the upper and lower surfaces of the base layer 1. The buffer reinforcement layer 3 is made of polyvinyl chloride (PVC) material, and a plurality of triangular first buffer pads 6 are embedded inside the buffer reinforcement layer 3. The material of the first buffer pad 6 is TPU plastic, and the plurality of first buffer pads 6 are evenly distributed inside the buffer reinforcement layer 3;

[0039] The material of the flame retardant layer 4 is a polyester film, and a magnesium hydroxide flame retardant is arranged inside the flame retardant layer 4. By arranging the flame retardant layer 4 made of a polyester film material and adding the magnesium hydroxide flame retardant inside the flame retardant layer 4, the excellent flame retardant properties of magnesium hydroxide are utilized. Compared with similar inorganic flame retardants, magnesium hydroxide has a better smoke suppression effect and can neutralize the acidic and corrosive gases generated during the combustion process, thereby improving the flame retardant properties of the insulating flame retardant film.

[0040] The flame retardant film is adjusted according to the size and shape of the battery and wrapped around the outer layer of the battery during lamination. At this time, the arc sleeve 5 is arranged on the outermost layer, so as to protect the battery.

[0041] The working principle of the lithium battery insulating flame retardant film provided by the utility model is as follows:

[0042] When in use, the first buffer pad 2 is installed on the top and bottom of the base layer 1 respectively, and the buffer reinforcement layer 3 is arranged on the outer side of the first buffer pad 2, and then the flame retardant layer 4 is installed on one side of the buffer reinforcement layer 3, and then a plurality of arc sleeves 5 are installed on one side of one of the flame retardant layers 4, and a plurality of partitions 51 are installed on the inner side of the arc sleeve 5, and a second buffer pad 52 is arranged between two adjacent partitions 51.

[0043] Compared with the related art, the lithium battery insulating flame retardant film provided by the utility model has the following advantages:

[0044] Beneficial effects:

[0045] By cooperating with each other, structures such as the arc sleeve 5, the partition plate 51 and the second buffer pad 52, when in use, after the flame retardant film is cut, the gas inside the arc sleeve 5 will not flow out, thereby affecting the buffering effect.

[0046] Second embodiment

[0047] Please refer to Figure 3 Based on the lithium battery insulating flame retardant film provided in the first embodiment of the present application, the second embodiment of the present application provides another lithium battery insulating flame retardant film. The second embodiment is only a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0048] Specifically, the second embodiment of the present application provides a lithium battery insulating flame-retardant film, which is different in that, in the lithium battery insulating flame-retardant film, a plurality of protrusions 6 are fixedly mounted on the outer side of the arc-shaped sleeve 5 .

[0049] The working principle of the lithium battery insulating flame retardant film provided by the utility model is as follows:

[0050] When in use, the protrusion 6 contacts the lithium battery, increasing the friction between the protrusion 6 and the lithium battery.

[0051] Compared with the related art, the lithium battery insulating flame retardant film provided by the utility model has the following advantages:

[0052] Beneficial effects:

[0053] By providing a plurality of protrusions 6 on the outer side of the arc-shaped sleeve 5 , the anti-slip effect between the arc-shaped sleeve 5 and the lithium battery can be increased during use.

[0054] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A lithium battery insulating flame retardant film, characterized in that: include: Grassroots; a first buffer pad, the first buffer pad being respectively arranged on the top and the bottom of the base layer; Buffer reinforcement layers, the buffer reinforcement layers are respectively arranged on the top and bottom of the base layer; A flame retardant layer, the flame retardant layer being arranged on one side of the buffer reinforcement layer; An arc-shaped sleeve, wherein the arc-shaped sleeve is fixedly connected to one side of the flame-retardant layer, a partition is fixedly installed on the inner side surface of the arc-shaped sleeve, and a second buffer pad is arranged on the inner side surface of the arc-shaped sleeve.

2. The lithium battery insulating flame-retardant film according to claim 1, characterized in that: The first buffer pad is in the shape of an equilateral triangle, and the inner angle of the first buffer pad is ninety degrees.

3. The lithium battery insulating flame-retardant film according to claim 2, characterized in that: The buffer reinforcement layer is arranged on the outer side of the first buffer pad.

4. The lithium battery insulating flame-retardant film according to claim 3, characterized in that: A plurality of the first buffer pads are provided and are evenly distributed on the top and bottom of the base layer.

5. The lithium battery insulating flame-retardant film according to claim 4, characterized in that: A plurality of the partition plates and a plurality of the second buffer pads are provided.

6. The lithium battery insulating flame-retardant film according to claim 5, characterized in that: The second buffer pad is arranged on one side of the partition.

7. The lithium battery insulating flame-retardant film according to claim 1, characterized in that: A plurality of protrusions are fixedly mounted on the outer side surface of the arc-shaped sleeve.

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