CN210668445U

CN210668445U - Mobile terminal

Info

Publication number: CN210668445U
Application number: CN201920340346.4U
Authority: CN
Inventors: 章琛; 卢琳; 陈敏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-03-18
Filing date: 2019-03-18
Publication date: 2020-06-02
Anticipated expiration: 2029-03-18

Abstract

The utility model provides a mobile terminal, this mobile terminal include the mobile terminal body, set up at this internal battery of mobile terminal, and the mobile terminal body is including the battery compartment that holds the battery. In order to prevent the mobile terminal body from being burnt out by flame spraying when thermal runaway of the interior of the battery is caused due to reasons such as short circuit, environmental stress or air pressure and temperature, a fireproof coating for isolating the battery from the mobile terminal body is sprayed on at least one of the inner surface and the outer surface of the battery bin, so that the mobile terminal body is isolated from the battery through the fireproof coating. Thereby when causing the inside fire of battery at the inside thermal runaway of battery, keep apart between with mobile terminal body and the battery through the fireproof coating that sets up, thereby prevent flame blowout battery compartment burn out the mobile terminal body. And at least one surface of the inner surface and the outer surface of the battery compartment is provided with a spraying mode, so that the thickness of the fireproof coating can be reduced, and the size of the mobile terminal can be reduced conveniently.

Description

Mobile terminal

Technical Field

The utility model relates to the communication technology field especially involves a mobile terminal.

Background

As mobile phones increasingly enter into the lives of people, the safety of lithium batteries contained in the mobile phones is more and more concerned. Fully charged lithium batteries suffer from a high probability of spontaneous ignition when subjected to external mechanical or thermal abuse. When the lithium battery is burnt, flame is sprayed out of the lithium battery shell and can ignite surrounding combustible substances, so that serious safety accidents are caused, property loss is low, and casualties are high. The existing solution is as follows: referring to fig. 1, set up one in the holding storehouse 2 of mobile terminal body 1 and contain fire extinguishing medium's fire prevention bag 3 in it, when taking place to catch a fire because of factors such as short circuit, pressure and temperature in battery 4 is inside, fire prevention bag 3 is heated, and its inside fire extinguishing medium inflation makes fire extinguishing medium spout from fire prevention bag 3 until propping fire prevention bag 3 brokenly to put out a fire fast, avoid the intensity of a fire to spread. However, in this way, the weight and thickness of the mobile terminal body 1 may increase.

SUMMERY OF THE UTILITY MODEL

The utility model provides a mobile terminal for flame blowout when preventing the inside fire of battery.

The utility model provides a mobile terminal, this mobile terminal include the mobile terminal body, set up at this internal battery of mobile terminal, and wherein, the mobile terminal body is including the battery compartment that holds the battery. For preventing the reason such as the inside short circuit of battery, environmental stress or atmospheric pressure and temperature, thereby flame blowout burns out the mobile terminal body when arousing the inside thermal runaway of battery to fire, at least one surface spraying in the internal surface of battery compartment and the surface has the fire protection coating who keeps apart battery and mobile terminal body, keeps apart through fire protection coating between messenger's mobile terminal body and the battery. Through the fireproof coating of spraying on at least one surface of battery compartment, when the inside thermal runaway of battery arouses that the battery is inside to catch fire, keep apart between with mobile terminal body and battery through the fireproof coating that sets up to prevent flame blowout battery compartment from burning out the mobile terminal body. And at least one surface of the inner surface and the outer surface of the battery compartment is provided with a spraying mode, so that the thickness of the fireproof coating can be reduced, and the size of the mobile terminal can be reduced conveniently.

In one embodiment, the fire-retardant coating comprises antimony trioxide and a halogen compound. By adopting the antimony trioxide and the halogen compound as the fireproof coating, when the temperature in the battery rises to the set temperature due to thermal runaway, the antimony trioxide and the halogen compound arranged on at least one surface of the battery compartment are melted and absorb heat to form a protective film for isolating air, so that flame is prevented from being sprayed out of the battery compartment when the internal of the battery is ignited due to the thermal runaway, and the mobile terminal body is prevented from being burnt out.

In a specific embodiment, the battery compartment includes a compartment bottom and a compartment wall disposed on the compartment bottom, where the material of the compartment bottom and the compartment wall may be a metal material such as aluminum, iron, stainless steel, and the like, and may also be an organic material. Therefore, when the temperature of the battery is rapidly increased to the set temperature due to thermal runaway, the antimony trioxide and the halogen compound react with the bin bottom and the bin wall which are made of metal materials or organic materials, so that a flame-retardant fireproof layer is formed between the bin bottom and the bin wall, and the battery is isolated from the mobile terminal body.

In a specific embodiment, the thickness of the fireproof coating is 20 μm to 100 μm, so that the influence of the fireproof coating on the thicknesses of the bin bottom and the bin wall of the battery bin is reduced, and the size of the mobile terminal is reduced.

In a specific embodiment, the battery comprises a battery core and a shell wrapping the battery core, wherein the fireproof coating is coated on the surface of the shell. In particular, when the fire-retardant coating is sprayed on the surface of the case, in a particular embodiment, the fire-retardant coating is sprayed on the outer surface of the case, thereby reducing the influence of the fire-retardant coating on the battery cell.

In a specific embodiment, the material of the housing may be a metal material such as aluminum, iron, or stainless steel, or may be an organic material.

In a specific embodiment, the mobile terminal body further comprises a cover plate covering the battery compartment, wherein a fireproof coating is sprayed on at least one of the side, facing the battery, and the side, facing away from the battery, of the cover plate, so as to further prevent flame from being sprayed out when the battery is on fire, and further reduce the influence on the mobile terminal body and inflammable matters around the mobile terminal when the battery is on fire.

In a specific embodiment, the material of the cover plate may be a metal material such as aluminum, iron, stainless steel, or an organic material.

In a specific implementation manner, the mobile terminal body further comprises a frame structure and a display screen assembly arranged on the frame structure, wherein the display screen assembly and the cover plate are respectively arranged on two opposite sides of the battery, and a fireproof coating is arranged on one surface of the display screen assembly opposite to the battery, so that the battery and the display screen assembly are separated through the fireproof coating, and therefore when the battery is on fire, the display screen assembly is prevented from being burnt by flame spraying.

In a specific embodiment, a back plate is fixedly connected to the side of the display screen assembly opposite to the battery, and a fireproof coating is sprayed on at least one of the side of the back plate facing the battery and the side of the back plate facing away from the battery, so that the fireproof coating separates the display screen assembly from the battery. When the back plate is specifically arranged, the material of the back plate may be a metal material such as aluminum, iron, or the like, or may be an organic material.

In a specific embodiment, the display screen assembly includes a backlight panel fixedly connected to a backplane.

Drawings

Fig. 1 is a schematic diagram of a mobile terminal provided in the prior art;

fig. 2 is a schematic diagram of a mobile terminal according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a battery provided in an embodiment of the present invention;

fig. 4 is a schematic diagram of a mobile terminal body according to an embodiment of the present invention;

fig. 5 is a schematic view of a cover plate according to an embodiment of the present invention;

fig. 6 is a schematic view of a display screen assembly according to an embodiment of the present invention;

fig. 7 is a schematic diagram of another battery according to an embodiment of the present invention.

Description of the drawings:

10-mobile terminal body 11-frame structure

12-Battery Cartridge 121-second conductive contact

13-cover plate 14-display screen assembly 141-backlight plate

20-battery 21-battery core

22-housing 23-first conductive contact 24-fixing element

30-fire protection coating

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

For the convenience of understanding the utility model provides a mobile terminal, first explain below the utility model provides a mobile terminal's application scene that this mobile terminal specifically can be cell-phone, notebook computer, panel computer etc.. The following describes a mobile terminal according to an embodiment of the present invention in detail with reference to the accompanying drawings.

Referring to fig. 2, an embodiment of the present invention provides a mobile terminal including a mobile terminal body 10 and a battery 20 disposed in the mobile terminal body 10. In the specific arrangement of the battery 20, referring to fig. 3, the battery 20 includes a battery cell 21 for generating electric power, and a case 22 wrapped around the battery cell 21. The battery cell 21 is a conventional battery cell, and may be a battery cell in a lithium battery, for example. When the housing 22 is specifically provided, the housing 22 includes a hollow cavity therein for accommodating the battery cell 21. The shape of the housing 22 may be specifically a cube. The material of the housing 22 may be a metal material such as aluminum, iron, stainless steel, or an organic material.

As shown in fig. 3, a housing 22 is provided with a plurality of first conductive contacts 23 on a surface thereof. And each first conductive contact 23 is conductively connected with the battery cell 21 through a lead, the battery cell 21 can transmit electric energy to the outside through the first conductive contact 23, and the outside can charge the battery cell 21 through the first conductive contact 23. Each first conductive contact 23 is isolated from the housing 22 by an insulating material such as plastic, rubber, etc. to provide insulation between each first conductive contact 23 and the housing 22. And the first conductive contact 23 is fixed by a fixing member 24 formed of an insulating material such as rubber or plastic, wherein the fixing member 24 is fixedly connected to the housing 22 by means of adhesion, clamping, or the like.

When the mobile terminal body 10 is specifically configured, referring to fig. 4, it includes a frame structure 11, and the frame structure 11 is used for fixing a main board, a display screen assembly, and the like. The frame structure 11 may be a middle frame structure commonly found in the prior art, that is, the main board, the display panel assembly and the battery 20 are respectively disposed on the frame structure 11, and the display panel assembly and the battery 20 are respectively disposed on two opposite sides of the frame structure 11. For purposes of the following description, the display screen assembly is located on the front side of the frame structure 11 and the battery 20 is located on the back side of the frame structure 11.

As shown in fig. 4, a battery compartment 12 for accommodating a battery 20 is disposed on the frame structure 11, and when the battery compartment 12 is specifically disposed, the battery compartment 12 includes a cavity for accommodating the battery 20 and defined by a compartment bottom and a compartment wall, and an opening for placing the battery 20 in the cavity. Wherein the shape of the cavity is consistent with the shape of the battery 20, so that the battery 20 can be placed in the battery compartment 12. When the battery compartment 12 is specifically formed, taking the cubic battery compartment 12 shown in fig. 4 as an example for description, the battery compartment 12 includes a compartment bottom and four compartment walls disposed on the compartment bottom, and a cavity with an opening is defined by the compartment bottom and the four compartment walls. The bottom of the battery compartment 12 may be a part of the frame structure 11, and a plate structure may be bonded or screwed to the frame structure 11 to serve as the bottom of the battery compartment 12. With the above arrangement, at least the frame structure 11 is spaced between the battery 20 and the display screen assembly.

Referring to fig. 4, a plurality of second conductive contacts 121 are disposed in the battery compartment 12, which correspond to the first conductive contacts 23 on the battery 20 one by one and are electrically connected to the first conductive contacts 23 respectively, specifically, the number of the first conductive contacts 23 on the battery 20 is equal to the number of the second conductive contacts 121 on the battery compartment 12, and the positions of the first conductive contacts 23 on the battery 20 correspond to the positions of the second conductive contacts 121 respectively, that is, when the battery 20 is placed in the battery compartment 12, each of the first conductive contacts 23 on the battery 20 is electrically connected to the corresponding second conductive contact 121 in the battery compartment 12. The second conductive contact 121 on the battery compartment 12 may adopt an elastic contact structure, and when the battery 20 is placed in the battery compartment 12, the first conductive contact 23 and the second conductive contact 121 are pressed against each other, so as to increase the stability of the electrical connection between the first conductive contact 23 and the second conductive contact 121.

It should be understood that the above description is only illustrative of one manner of forming the battery compartment 12, and that other manners may be used in addition thereto.

To prevent flame from being blown out of the case 22 and the battery container 12 when the battery 20 is ignited due to thermal runaway caused by short circuit, excessive temperature, or the like. The surface of the battery compartment 12 as shown in fig. 4 is sprayed with a fire retardant coating 30. Specifically, when the fireproof coating 30 is sprayed on the surface of the battery compartment 12, the fireproof coating 30 may be sprayed on the inner surface (the side opposite to the battery 20) of the battery compartment 12, specifically, the fireproof coating 30 is sprayed on both the side facing the battery 20 on the compartment bottom of the battery compartment 12 and the side facing the battery 20 on the compartment wall, and the second conductive contacts 121 are exposed outside the fireproof coating 30, so as to prevent short circuit or open circuit between the second conductive contacts 121. The fireproof coating 30 can be sprayed on the outer surface of the battery compartment 12, and in particular, the fireproof coating 30 can be sprayed on the side of the compartment bottom of the battery compartment 12, which faces away from the battery, and the sides of the four compartment walls, which faces away from the battery 20. The fire-retardant coating 30 may be sprayed on both the inner surface of the battery compartment 12 and the outer surface of the battery compartment 12, specifically, the fire-retardant coating 30 is sprayed on both the side facing the batteries 20 and the side facing away from the batteries 20 on the compartment bottom of the battery compartment 12, and the fire-retardant coating 30 is sprayed on both the side facing the batteries 20 and the side facing away from the batteries 20 on the four compartment walls of the battery compartment 12. It should be understood that at least one of the inner surface and the outer surface of the battery compartment 12 is coated with the fireproof coating 30, so that the battery 20 is isolated from the display screen assembly, the main board, and the like through the fireproof coating 30, thereby preventing the flame from being sprayed out when a fire occurs inside the battery core 21, and reducing the probability of the display screen assembly, the main board, and the like being burned out due to the spread of the flame when the fire occurs in the battery 20.

When the above-mentioned fire-retardant coating 30 is specifically provided, the material of the fire-retardant coating 30 includes antimony trioxide (Sb)₂O₃) And halogen compounds, wherein the ratio of antimony trioxide to halogen compound is any ratio, and antimony trioxide (Sb) is included in the present document₂O₃) And a halogen compound are defined as flame retardants. The halogen compound may be HCl. When the temperature inside the battery cell 21 is abruptly increased due to thermal runaway, antimony trioxide in the fireproof coating 30 is melted and forms a protective film for isolating air around the battery compartment 12, thereby isolating the battery 20 from the outside air and preventing the fire inside the battery 20 from being ignited due to excessive temperature. And the antimony trioxide absorbs heat when melted, thereby lowering the temperature of the cell 20. When the temperature inside the battery 20 rises, the temperature of the bottom and the wall of the battery container 12 also rises, so that the halogen compound (hereinafter, explained by using HCl as an example) provided on the bottom and the wall of the battery container 12 reacts with antimony trioxide to form SbOCl, and then the SbOCl is thermally decomposed to form SbCl₃Thereby absorbing a large amount of heat and further reducing the temperature within the battery compartment 12, thereby ensuring that the temperature within the battery compartment 12 is less than 400 c. SbCl if the temperature in the battery 20 is too high and ignition occurs₃At the flame temperature, Cl radicals are decomposed, and the radicals are combined with active H, OH in the flame to play a role in suppressing the flame. Simultaneously SbOCl and SbCl₃The steam has high specific gravity and can adhere to the surface of the battery chamber 12, thereby playing a role in isolating air. And condenses into liquid droplets or solid particles above the flame, energy is dissipated at the surface of the solid, and the combustion speed is slowed or stopped.

The wall and the bottom of the battery compartment 12 may be made of metal such as aluminum, iron, stainless steel, or organic material, and when the temperature inside the battery 20 rises, the antimony trioxide and the halogen compound react with the metal material or the organic material to form a flame retardant fireproof layer, so as to prevent flame from burning. Through the mode, the device such as a display screen assembly and a mainboard in the mobile terminal is prevented from being burnt out by flame spraying when fire is fired in the battery 20, and inflammable substances such as cotton, hemp, acrylic fibers, wool, silk and polyester wool around the mobile terminal are prevented from being ignited by flame spreading, so that personal damage or property damage is caused.

The thickness of the fireproof coating 30 may be 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, or any value between 20 μm and 100 μm, so as to reduce the thickness space of the battery 20 occupied by the fireproof coating 30 and reduce the size of the battery 20.

Fig. 5 shows a battery compartment 12, which is covered with a cover plate 13, and a battery 20 is located between the cover plate 13 and the frame structure 11. When the cover 13 is specifically provided, the cover 13 may be a cover commonly used in the prior art, so as to cover the battery compartment 12, so that the battery 20 is located inside the mobile terminal. The material of the cover plate 13 may be a metal material such as aluminum, iron, stainless steel, or a stainless steel material. The cover plate 13 and the battery compartment 12 can be detachably and fixedly connected through a clamping structure, screws and the like, and the cover plate 13 and the battery compartment 12 or the battery 20 can be non-detachably connected through an adhesion mode.

The cover plate 13 shown in fig. 5 has a fire-retardant coating 30 sprayed on its surface, and specifically, the fire-retardant coating 30 is sprayed on at least one of the inner surface (the surface facing the battery 20) and the outer surface (the surface facing away from the battery 20) of the cover plate 13. Specifically, the fireproof coating 30 may be sprayed only on the inner surface of the cover plate 13, the fireproof coating 30 may be sprayed only on the outer surface of the cover plate 13, or the fireproof coating 30 may be sprayed on both the inner surface of the cover plate 13 and the outer surface of the cover plate 13. The battery 20 is separated from the outside of the mobile terminal by the cover plate 13 sprayed with the fireproof coating 30 through the fireproof coating 30 coated on the cover plate 13, so that when fire breaks out inside the battery core 21, the flame is prevented from being sprayed out and spreading after burning out the cover plate 13, and inflammable substances such as cotton, hemp, acrylic fibers, wool, silk and terylene wool around the mobile terminal are prevented from being ignited, thereby preventing personal damage or property damage.

The frame structure 11 may also be another frame structure with a section of Contraband type, in which the display screen assembly is fixed at the opening of the frame structure 11 by means of bonding, screw fastening, or the like, the battery compartment 12 and the motherboard are fixed at the bottom of the frame structure 11 (the surface opposite to the opening), and the display screen assembly is disposed in close contact with the battery 20 and the motherboard. At this time, the bottom of the battery compartment 12 is a backlight plate 141 in the display screen assembly, that is, four compartment walls arranged on the backlight plate 141 enclose a cavity for placing the battery 20, and when the battery 20 is placed in the battery compartment 12, the battery 20 is tightly attached to the backlight plate 141.

The display screen assembly 14 shown in fig. 6 is sprayed with a fire retardant coating 30 on the side facing the battery 20. Specifically, the side of the backlight plate 141 of the display screen assembly 14 facing the battery 20 is coated with a fire-blocking coating 30 such that the fire-blocking coating 30 separates the backlight plate 141 from the battery 20. A back plate may be fixedly connected to the backlight plate 141 by bonding, screw fastening, or the like, and the material of the back plate may be a metal material such as aluminum, iron, stainless steel, or an organic material. And the fireproof coating 30 is sprayed on at least one of the surface facing the battery 20 and the surface back to the battery 20 on the back plate, so that the battery 20 and the display screen assembly 14 are separated by the fireproof coating 30, and therefore, when fire breaks out inside the battery 20, the display screen assembly 14 is prevented from being burnt out by flame spraying when the fire breaks out inside the battery 20. It should be understood that the frame structure 11 is not limited to the above-described embodiment, and other embodiments may be adopted.

Additionally, the surface of the housing 22 of the battery 20 may also be sprayed with a fire retardant coating 30. Specifically, referring to fig. 7, a fire-retardant coating 30 is sprayed on the surface of the housing 22. When the fireproof coating 30 is sprayed on the surface of the shell 22, the fireproof coating 30 is sprayed on at least one of the inner surface and the outer surface of the shell 22, and specifically, the fireproof coating 30 can be sprayed on both the inner surface and the outer surface of the shell 22; the fire-retardant coating 30 can also be sprayed only on the inner surface of the shell 22; referring to fig. 7, the fireproof coating 30 may be sprayed only on the outer surface of the case 22 to prevent the fireproof coating 30 from affecting the performance of the battery cell 21 inside the case 22. In the above manner, the fireproof coating 30 may be sprayed on the plate material for preparing the case 22 for wrapping the battery cell 21 when manufacturing the battery 20, thereby simplifying the manufacturing process. When the fireproof coating 30 is sprayed on the surface of the casing 22, the first conductive contact 23 disposed on the casing 22 is exposed outside the fireproof coating 30, so as to prevent the first conductive contact 23 from being short-circuited or broken.

Through the arrangement mode, the fireproof coating 30 for preventing the flame from being sprayed out when the inside of the battery 20 is on fire is arranged on the shell 22, when the inside of the battery 20 is on fire, the fireproof coating 30 can release inert gas and absorb heat, so that the temperature of the surface of the shell 22 is not more than 400 ℃, the battery core 21 and the display screen assembly 14, the mainboard and other devices outside the shell 22 are separated from each other through the inert gas, the flame is prevented from being sprayed out and spread and diffused when the inside of the battery core 21 is on fire, the display screen assembly 14, the mainboard and other devices in the mobile terminal are prevented from being burnt out, and the flame is prevented from spreading and igniting inflammable matters such as cotton, hemp, acrylic fibers, wool, silk and polyester wool around the mobile terminal, so that personal damage or property damage is caused.

It should be noted that the surface of at least one of the surfaces of the battery compartment 12 or the housing 22 is sprayed with a fire retardant coating 30. Specifically, the fireproof coating 30 may be sprayed only on the surface of the housing 22, or the fireproof coating 30 may be sprayed only on the surface of the battery compartment 12, or both the surface of the housing 22 and the surface of the battery compartment 12 may be sprayed with the fireproof coating 30, so that the battery cell 21 is isolated from the display screen assembly 14, the motherboard, and other devices in the mobile terminal body 10 by the fireproof coating 30, and the display screen assembly 14, the motherboard, and other devices are prevented from being burned out when fire is generated inside the battery cell 21.

Through the above arrangement, when the internal of the battery 20 is ignited due to thermal runaway inside the battery 20, the mobile terminal body 10 is isolated from the battery 20 by the fireproof coating 30 sprayed on at least one surface of the battery compartment 12, so as to prevent the flame from spraying out of the battery compartment 12 to burn out the mobile terminal body 10. And the thickness of the fireproof coating 30 can be reduced by being disposed on at least one of the inner surface and the outer surface of the battery compartment 12 by spraying, thereby facilitating the reduction in size of the mobile terminal.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, and all should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A mobile terminal, comprising:

a mobile terminal body;

a battery disposed within the mobile terminal body;

the mobile terminal body comprises a battery bin for accommodating the battery, and a fireproof coating for isolating the battery from the mobile terminal body is sprayed on the inner surface and/or the outer surface of the battery bin.

2. The mobile terminal of claim 1, wherein the material of the fireproof coating is a flame retardant, and the flame retardant comprises antimony trioxide and a halogen compound.

3. The mobile terminal of claim 2, wherein the battery compartment comprises a compartment bottom and a compartment wall disposed on the compartment bottom, wherein the material of the compartment bottom and the compartment wall is stainless steel or an organic material.

4. The mobile terminal of claim 3, wherein the thickness of the fire-retardant coating is 20 μm to 100 μm.

5. The mobile terminal according to any one of claims 1 to 4, wherein the battery comprises a battery core and a casing wrapping the battery core, wherein the fireproof coating is sprayed on the outer surface of the casing.

6. The mobile terminal of claim 5, wherein the material of the housing is stainless steel or an organic material.

7. The mobile terminal according to claim 1, wherein the mobile terminal body further comprises a cover plate covering the battery compartment, wherein the fireproof coating is sprayed on at least one of a side of the cover plate facing the battery and a side of the cover plate facing away from the battery.

8. The mobile terminal of claim 7, wherein the material of the cover plate is stainless steel or an organic material.

9. The mobile terminal of claim 7 or 8, wherein the mobile terminal body further comprises a frame structure, and a display screen assembly disposed on the frame structure;

the display screen assembly and the cover plate are respectively arranged on two opposite sides of the battery, and the fireproof coating is arranged on one surface, opposite to the battery, of the display screen assembly.

10. The mobile terminal of claim 9, wherein a back plate is fixedly connected to a side of the display screen assembly opposite to the battery, and the fire-retardant coating is sprayed on at least one of a side of the back plate facing the battery and a side of the back plate facing away from the battery.