Battery pack with heat-shrinkable insulating label

Abstract

The utility model provides a battery pack (100) with a heat-shrinkable insulating label, which is characterized in that the battery pack (100) is provided with a battery pack (1) and a heat-shrinkable insulating label (2), the back surface of the heat-shrinkable insulating label (2) is provided with back glue, and the back glue is adhered to the side surface of the battery pack (1) in a winding manner; and the battery pack (1) is formed by connecting a plurality of batteries (11) in series, in parallel or in a series and parallel combination mode.

Description

Technical Field

[0001] The utility model relates to a battery pack with a heat-shrinkable insulating label. Background Art

[0002] In recent years, various batteries or battery packs have flooded the market, and all existing batteries or battery packs have labels attached to their surfaces. The labels coated on the outer surface of the main body of the battery or battery pack play the role of insulation, waterproofing, protection, beautification and identification, and are important components for maintaining battery performance and reflecting battery quality. Therefore, battery manufacturers attach great importance to the performance and structure of such labels.

[0003] Generally speaking, battery manufacturers usually wrap a strip-shaped heat shrink label around the main body of the battery cell, or make the heat shrink label into a bag and insert it into the battery cell, and then perform a heat shrink process to make the label shrink and cover the outer surface of the main body of the battery.

[0004] CN1196139A discloses a single-layer label for labeling a dry cell battery, the battery having an elongated circumferential shell extending along the length of the battery and defining an axis, and opposite ends transverse to the axis and together with the shell enclosing a DC power supply core, the label comprising: (a) a transparent, self-supporting, substantially uniaxially oriented, heat-shrinkable polymer film backing; (b) an opaque colored layer consisting of an alkali-resistant non-conductive ink applied to the inner surface of the backing and supported by the backing; and (c) a non-conductive pressure-sensitive adhesive layer applied and extending on the colored layer along at least a first edge and a second edge, the pressure-sensitive adhesive having sufficient peel strength to prevent the applied label from lifting from the battery shell.

[0005] CN216849103U discloses a shrinkable adhesive material for battery labels, including a printed layer, the inner surface of the printed layer is fixedly connected to a metal ring, the metal ring is a bendable material, the printed layer is a heat-shrinkable material, the lower surface of the printed layer is fixedly connected to a base layer; the lower surface of the base layer is fixedly connected to a raised ring, and the lower surface of the base layer and located inside the raised ring is fixedly connected to a raised layer.

[0006] The existing battery labels have the following problems: Under high temperature or long-term aging conditions, different levels of secondary heat shrinkage will occur. Secondary shrinkage will cause partial exposure of the battery core, resulting in reduced battery safety. After long-term high-temperature aging, the heat shrink tubing will become brittle and crack, resulting in reduced safety of the battery pack. The thickness of the existing heat shrink tubing will increase after heat shrinkage, and the size of the assembled battery will also increase. Utility Model Content

[0007] The present utility model is developed in view of the problems of the prior art. Moreover, the purpose of the present utility model is to provide a battery pack with a heat-shrinkable insulating label. No secondary shrinkage will occur under high temperature or for a long time. Since no secondary shrinkage occurs, the battery cell will not be exposed, and the safety is high. The heat-shrinkable sleeve will not become brittle and crack after long-term high-temperature aging, and the stability is good and the safety is high. The heat-shrinkable label has low cost and high productivity. Since thinner labels can be used, the size of the assembled battery can be reduced.

[0008] The gist of the utility model is as follows.

[0009] (1) A battery pack with a heat-shrinkable insulating label, comprising a battery pack and a heat-shrinkable insulating label, wherein the back of the heat-shrinkable insulating label has an adhesive backing and is affixed to the side of the battery pack in a wound manner, wherein the battery pack is formed by connecting a plurality of batteries in series, in parallel, or in a combination of series and parallel, and wherein the heat-shrinkable insulating label is a heat-shrinkable insulating label having a multilayer structure consisting of a polyethylene terephthalate layer, an ink layer, a glue layer, an aluminum layer, a polyethylene terephthalate layer, a glue layer, and a polyethylene terephthalate layer in sequence.

[0010] (2) The battery pack with a heat-shrinkable insulating label according to claim (1), wherein the battery pack is a lithium battery pack or a nickel-metal hydride battery pack.

[0011] (3) The battery pack with a heat-shrinkable insulating label according to claim (1), wherein the thickness of the multi-layer heat-shrinkable insulating label is less than 0.1 mm.

[0012] Utility Model Effect

[0013] The utility model can provide a battery pack with a heat-shrinkable insulating label. No secondary shrinkage will occur under high temperature or for a long time. Since no secondary shrinkage occurs, the battery core will not be exposed, and the safety is high. The heat-shrinkable sleeve will not be brittle and cracked after long-term high-temperature aging, and the stability is good and the safety is high. The heat-shrinkable label has low cost and high productivity. Since a thinner label can be used, the size of the assembled battery can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of a battery pack with a heat-shrinkable insulating label according to an embodiment of the utility model.

[0015] Figure 2 It is a cross-sectional view of a heat-shrinkable insulating label with a multi-layer structure.

[0016] 100: Battery pack with heat shrinkable insulation label

[0017] 1: Heat shrinkable insulation label

[0018] 2: Battery Pack

[0019] 3: Polyethylene terephthalate layer

[0020] 4: Ink layer

[0021] 5: Glue layer

[0022] 6: Aluminum layer

[0023] 7: Polyethylene terephthalate layer

[0024] 8: Glue layer

[0025] 9: Polyethylene terephthalate layer

[0026] 10: Multi-layer heat-shrinkable insulation label

[0027] 11: Battery DETAILED DESCRIPTION

[0028] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The described embodiments are merely exemplary and can take a variety of forms. In addition, the drawings disclosed in this specification are schematic in principle. That is, the size ratios on the drawings may not be consistent with the actual size ratios, and the size ratios between the drawings may not be consistent.

[0029] The specific implementation of the battery pack with heat shrinkable insulating label of the present invention will be described below in conjunction with the accompanying drawings.

[0030] Figure 1 It is a three-dimensional schematic diagram of a battery pack with a heat-shrinkable insulating label according to an embodiment of the utility model. Figure 2 It is a cross-sectional view of the multi-layer structure of the heat-shrinkable insulating label of the utility model. The battery pack 100 with the heat-shrinkable insulating label has a battery pack 2 and a heat-shrinkable insulating label 1. The back of the heat-shrinkable insulating label 1 has an adhesive backing and is attached to the side of the battery pack 2 in a winding manner. The battery pack 2 is formed by connecting a plurality of batteries 11 in series, in parallel, or in a combination of series and parallel. The battery pack 2 can be a lithium battery pack, a nickel-metal hydride battery pack, or other battery packs. The battery pack 2 can be prefabricated into different widths, lengths, thicknesses, and shapes. Preferably, the battery 11 is a cylindrical battery such as 18650, which has the characteristics of high single-cell energy density, light weight, long life, and easy assembly.

[0031] The battery pack is partially or entirely covered with a heat-shrinkable insulating label, which is a single-layer or multi-layer label structure with a plastic substrate. The plastic is preferably polyethylene terephthalate (commonly known as polyester resin, PET). The back of the heat-shrinkable insulating label has an adhesive backing and is attached to the side of the battery pack.

[0032] The single-layer heat-shrinkable insulating label is formed of a single-layer polyethylene terephthalate film and has a thickness of less than 0.06 mm, which can reduce the thickness of a battery pack with the heat-shrinkable insulating label, thereby being more conveniently applied to power supplies of various devices, vehicles, etc.

[0033] The manufacturing method of polyethylene terephthalate film is not particularly limited, and can be manufactured using the manufacturing process commonly used in the art. It can be manufactured by known methods such as T-die method, tube film method, etc. After the manufactured polyethylene terephthalate film is cooled by cooling rollers, air, water, etc., it is reheated by hot air, warm water, infrared rays, etc., and is stretched unidirectionally or bidirectionally simultaneously or stepwise by roller stretching method, tenter stretching method, tube film stretching method, long interval stretching method, etc. The stretching temperature can be appropriately changed according to the softening temperature of the resin constituting the polyethylene terephthalate film and the purpose of the polyethylene terephthalate film, and the stretching ratio in the main shrinking direction can be appropriately determined according to the constituent components, stretching method, stretching temperature, and product form of the polyethylene terephthalate film.

[0034] The multi-layer heat-shrinkable insulating label is formed by multiple polyethylene terephthalate films. For example, Figure 2 As shown, the multi-layer heat-shrinkable insulating label 10 sequentially comprises polyethylene terephthalate 3, ink 4, glue 5, aluminum layer 6, polyethylene terephthalate 7, glue 8, and polyethylene terephthalate 9. The multi-layer heat-shrinkable insulating label 10 is attached to the surface of the battery. The thickness of the multi-layer heat-shrinkable insulating label is less than 0.1 mm, which can reduce the thickness of the battery pack with the heat-shrinkable insulating label, so that it can be more conveniently used in power sources of various devices, vehicles, etc.

[0035] In addition, heat-shrinkable insulating label structures of different thicknesses and lengths are designed according to different requirements.

[0036] A specific example of a battery pack was produced according to the following steps.

[0037] A multi-layer heat-shrinkable insulating label is made of polyethylene terephthalate, ink, glue, aluminum layer, polyethylene terephthalate, glue, and polyethylene terephthalate in sequence. The back of the heat-shrinkable insulating label has adhesive, and is attached to the side of a battery pack in a winding manner. A heating method is used to make the positive and negative sides of the battery pack of the wound heat-shrinkable insulating label partially shrink and deform to wrap the positive and negative electrodes of the battery, thereby making the battery pack with the heat-shrinkable insulating label of the utility model, and the battery pack is formed by connecting multiple batteries in series, parallel, or in a combination of series and parallel.

[0038] According to the battery pack with heat-shrinkable insulating labels of the utility model, the labels are completely attached to the periphery of the battery after being wound, and the battery will not move axially after the labels are wound and attached, and the problem of secondary heat shrinkage of the sleeve labels will not occur. In addition, by adjusting the equipment, labels of different structures can be wound and heat-shrunk using the same equipment.

[0039] The present invention is described above with respect to the currently preferred embodiments, but such disclosure should not be interpreted as limiting. Various modifications and changes are obvious to those skilled in the art in the technical field to which the present invention belongs by reading the above disclosure. Therefore, the appended claims should be understood to include all modifications and changes without departing from the true spirit and scope of the present invention.

[0040] Industrial Applicability

[0041] The utility model can provide a battery pack with a heat-shrinkable insulating label that does not undergo secondary heat shrinkage. Therefore, the battery pack with a heat-shrinkable insulating label of the utility model can be used as a power source for various devices, such as a power source or backup power source for power tools, electric toys, electric bicycles, electric cars, electric skateboards, cordless phones, etc.

Claims

1. A battery pack with a heat-shrinkable insulating label, characterized in that: The invention comprises a battery pack and a heat-shrinkable insulating label. The back of the heat-shrinkable insulating label has adhesive on it and is affixed to the side of the battery pack in a winding manner. The battery pack is formed by connecting a plurality of batteries in series, in parallel or in a combination of series and parallel. The heat-shrinkable insulating label is a heat-shrinkable insulating label with a multi-layer structure which is sequentially composed of a polyethylene terephthalate layer, an ink layer, a glue layer, an aluminum layer, a polyethylene terephthalate layer, a glue layer and a polyethylene terephthalate layer.

2. The battery pack with a heat-shrinkable insulating label according to claim 1, characterized in that: The battery pack is a lithium battery pack or a nickel-metal hydride battery pack.

3. The battery pack with a heat-shrinkable insulating label according to claim 1, characterized in that: The thickness of the multi-layer heat-shrinkable insulation label is less than 0.1 mm.

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