TW202320395A - Battery device - Google Patents

Abstract

A battery device includes a battery module and a protective paint. The battery module has an outer surface. The protective paint is attached to the outer surface of the battery module to enhance the structural strength of the battery module.

Description

battery unit

The present invention relates to an electronic component, and in particular to a battery device.

Due to the advantages of high energy density and working voltage, lithium secondary batteries have been widely used as energy sources for various electronic products and mobile devices. According to the appearance, it can be divided into: pouch cell, cylindrical battery and prismatic battery. At present, the focus is on pouch batteries. The reason is that the size of the internal stacked electrode group can be easily designed and adjusted, so the shape of pouch batteries is easy to change. Furthermore, the external battery housing and the accommodation space can easily correspond to the size and structure of the electrode group, so the pouch battery is very suitable for consumer electronics and mobile devices.

Generally speaking, the system body equipped with the battery module must pass the drop test to ensure that the battery module will not be displaced due to general impact, and thus cannot normally supply power to other electronic components. The current design uses screws to pass through the plastic casing of the battery module to lock the battery module to the casing of the system body. However, when the drop test is performed, the plastic material is not resistant to falling, and the screw holes provided at the corners are prone to rupture or deformation due to stress concentration, thereby damaging the battery module. In addition, in the high-temperature and high-humidity experimental test before the product is produced, the convex ribs between two adjacent pouch battery cells and the adhesive layer between the bottom of the pouch battery cell and the casing limit the quality of the pouch battery cell. The space for thermal expansion will lead to serious deformation of the pouch battery cell after the high temperature and high humidity experimental test, which will affect the reliability of the battery device.

The invention provides a battery device with better structural strength.

The battery device of the present invention includes a battery module and a protective coating. The battery module has an outer surface. The protective coating is attached to the outer surface of the battery module to enhance the structural strength of the battery module.

In an embodiment of the present invention, the above-mentioned protective coating is sprayed on the outer surface of the battery module.

In an embodiment of the present invention, the above-mentioned protective coating is made of heat-resistant and explosion-proof materials.

In an embodiment of the present invention, the above-mentioned protective coating is a paint without organic solvent.

In an embodiment of the present invention, the above-mentioned battery module includes a first casing part and a second casing part. The first casing part is assembled on the second casing part to define an outer surface.

In an embodiment of the present invention, the material of the above-mentioned first casing part and the material of the second casing part respectively include metal or plastic.

In an embodiment of the present invention, the above-mentioned second casing part includes a body and a plurality of partitions. The partition is located in the body and connected to the body to divide the body into multiple accommodating areas.

In an embodiment of the present invention, the above-mentioned battery module includes a plurality of battery cells, which are fixed on the second casing part and are respectively located in the accommodating area.

In an embodiment of the present invention, the above-mentioned battery cells are pouch battery cells or angle-shaped battery cells.

In an embodiment of the present invention, the tensile strength of the protective coating is greater than 6600 PSI, and the tear strength of the protective coating is greater than 780 LBS/in.

Based on the above, in the battery device of the present invention, the protective paint is attached to the outer surface of the battery module to enhance the structural strength of the battery module. Therefore, when the battery device is subjected to a drop test, the protective coating can prevent the impact force from damaging the battery module during the drop test; and when the battery device is subjected to high-temperature and high-humidity experimental tests, the protective coating can limit the impact of the battery module. It still retains its original thickness without deformation. In short, the battery device of the present invention can have better structural reliability.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail together with the accompanying drawings.

FIG. 1 is a schematic perspective view of a battery device according to an embodiment of the present invention. FIG. 2 is a partially exploded perspective view of the battery device in FIG. 1 . Please refer to FIG. 1 first. In this embodiment, the battery device 100 includes a battery module 110 and a protective paint 120 . The battery module 110 has an outer surface 113 . The protective paint 120 is attached to the outer surface 113 of the battery module 110 to enhance the structural strength of the battery module 110 .

It should be noted that, in order to facilitate the description of the components of the battery module 110 and the formation of the outer surface 113 , FIG. 2 disassembles the battery module 110 with the protective paint 120 attached thereto. In detail, please refer to FIG. 1 and FIG. 2 at the same time. In this embodiment, the battery module 110 is embodied as a rectangle, wherein the battery module 110 includes a first casing part 112 and a second casing part 114 . The first housing part 112 is assembled on the second housing part 114 to define an outer surface 113 . That is to say, the outer surface 113 of this embodiment is substantially composed of the outer surface of the first housing part 112 and the outer surface of the second housing part 114 exposed outside the first housing part 112 . Except for the connecting components (such as cable connectors, etc.) disposed on the battery module 110 , the surface of the battery module 110 visible to the naked eye is covered with a protective paint 120 .

In one embodiment, the first housing portion 112 is formed by bending a metal sheet, which can effectively reduce the cost. The metal sheet is, for example, a galvanized steel sheet or a stainless steel sheet, but not limited thereto. In another embodiment, the material of the first casing part 112 can also be plastic, but not limited thereto. Moreover, the second casing part 114 of this embodiment includes a body 115 and a plurality of partitions 117 (two partitions 117 are schematically shown). The partition 117 is located in the body 115 and connected to the body 115 to divide the body 115 into a plurality of accommodating areas A (three accommodating areas A are schematically shown). The material of the second casing part 114 can be, for example, metal or plastic, but not limited thereto. In addition, the battery module 110 includes a plurality of battery cells 116 fixed on the second housing part 114 and located in the accommodating area A respectively. Here, the battery cells 116 are respectively pouch battery cells or angle-shaped battery cells, but not limited thereto.

In this embodiment, the battery module 110 is, for example, an embedded flexible packaging structure, and the protective paint 120 is sprayed on the outer surface 113 of the battery module 110 . Specifically, after the first housing part 112 is assembled with the second housing part 114 to define the outer surface 113 , the protective coating 120 is sprayed on the outer surface 113 . That is to say, the protective coating 120 is sprayed after the battery module 110 is assembled. The protective coating 120 dries rapidly within 5 seconds after spraying, and forms a dense, permanent and elastic protective layer on the outer surface 113 of the battery module 110 . The protective coating 120 has characteristics such as high hardness, high chemical resistance, and UV stability. The tensile strength of the protective coating 120 is greater than 6600 PSI, while the tear strength is greater than 780 LBS/in, and the protective coating 120 has an elongation of 400%. The adhesion of the protective paint 120 can also increase the strength and toughness of the battery module 110 by 300%. Preferably, the protective coating 120 is made of a heat-resistant and explosion-proof material, and the protective coating 120 is a paint that does not contain organic solvents, which means that the protective coating 120 is an environmentally friendly and green safety coating. In other words, the protective coating 120 can absorb shock and resist damage, enhance the performance of the battery module 110 and improve the reliability of the overall electronic device 100 .

Therefore, when the battery device 100 is subjected to a drop test, since the protective coating 120 is attached to the outer surface 113 of the battery module 110 , the impact force during the drop test can be prevented from damaging the battery module 110 . That is to say, the setting of the protective coating 120 can provide the ability of the battery module 110 to resist falling. In addition, when the battery device 100 is subjected to high-temperature and high-humidity experimental tests, the protective coating 120 can forcefully restrict the battery module 110 to maintain the original thickness without deformation. In short, the battery device 100 of this embodiment can have better structural reliability.

To sum up, in the battery device of the present invention, the protective paint is attached to the outer surface of the battery module to enhance the structural strength of the battery module. Therefore, when the battery device is subjected to a drop test, the protective coating can prevent the impact force from damaging the battery module during the drop test; and when the battery device is subjected to high-temperature and high-humidity experimental tests, the protective coating can limit the impact of the battery module. It still retains its original thickness and does not deform. In short, the battery device of the present invention can have better structural reliability.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention should be defined by the scope of the appended patent application.

100: battery device 110: Battery module 112: The first shell part 113: Outer surface 114: second shell part 115: Ontology 116: battery cell 117: clapboard 120: Protective coating A:Accommodating area

FIG. 1 is a schematic perspective view of a battery device according to an embodiment of the present invention. FIG. 2 is a partially exploded perspective view of the battery device in FIG. 1 .

100: battery device

110: Battery module

112: The first shell part

113: Outer surface

114: second shell part

120: Protective coating

Claims (10)

A battery device comprising: a battery module having an outer surface; and A protective coating is attached to the outer surface of the battery module to enhance the structural strength of the battery module. The battery device as claimed in claim 1, wherein the protective coating is sprayed on the outer surface of the battery module. The battery device as claimed in claim 1, wherein the protective coating is made of a heat-resistant and explosion-proof material. The battery device according to claim 1, wherein the protective paint is a varnish not containing an organic solvent. The battery device as claimed in claim 1, wherein the battery module includes a first case part and a second case part, and the first case part is assembled on the second case part to define the The outer surface. The battery device as claimed in claim 5, wherein the material of the first casing part and the material of the second casing part respectively include metal or plastic. The battery device as claimed in claim 5, wherein the second casing part includes a body and a plurality of partitions, the partitions are located in the body and connected to the body, and the body is divided into a plurality of accommodation areas . The battery device as claimed in claim 7, wherein the battery module includes a plurality of battery cells fixed on the second casing part and respectively located in the accommodating areas. The battery device as claimed in claim 8, wherein the battery cells are pouch cells or angle-shaped cells. The battery device of claim 1, wherein the tensile strength of the protective coating is greater than 6600 PSI, and the tear strength of the protective coating is greater than 780 LBS/in.

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