Heat dissipation structure, battery and mobile terminal

Abstract

The utility model discloses a heat dissipation structure, a battery and a mobile terminal, the heat dissipation structure comprises a functional layer, the functional layer comprises a heat conduction sub-layer and a first heating sub-layer which are attached together, and one side of the heat conduction sub-layer back to the first heating sub-layer is attached to the surface of a battery body. According to the utility model, the heat of the battery body can be transmitted to the heat conduction sub-layer so as to dissipate heat of the battery body, and meanwhile, the heat conduction sub-layer can conduct the heat of a high-heating area on the battery body to a low-temperature area, so that the highest temperature of the battery body is reduced, and the use safety can be ensured; therefore, the battery body can be heated in a low-temperature environment, so that the battery body is at a normal working temperature, when the first heating sub-layer emits heat, heat can be transferred to the heat conduction sub-layer, so that the heat conduction sub-layer can uniformly transfer the heat to the battery body, the overall temperature of the battery body is more uniform, and the service life of the battery body is prolonged. And normal work of the battery is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a heat dissipation structure, a battery and a mobile terminal. Background Art

[0002] In order to meet user needs, most mobile phone products currently hope that the battery can be charged quickly (charge as much power as possible in a short time); the charging current needs to be increased. The maximum current carrying requirement of the current mobile phone battery protection board has reached more than 12A. As the current increases, the temperature of the PCB board and the power devices used for protection will increase significantly, and the mobile phone is prone to overheating when charging. High temperature has a great impact on the battery and there is a risk of explosion.

[0003] In the current PCM design of mobile phone fast-charging batteries, the power devices in the current path include MOS switches used as switches and precision resistors used for overcurrent detection. In addition to the heat generated by the power devices, there is also PCB copper foil and the battery body. The structural space left for PCM in mobile phone batteries is relatively limited. Power devices are generally designed on a relatively narrow PCB. The battery cell is connected to the PCB board through two positive and negative poles and a nickel sheet, thus forming a battery with protection function.

[0004] However, as far as current fast-charging batteries are concerned, the heat generated by PCM is more concentrated and the heat dissipation is poor. At the same time, it is also impossible to heat the battery in a low temperature environment. Utility Model Content

[0005] The primary purpose of the utility model is to provide a heat dissipation structure to dissipate heat when a mobile phone battery is overheated and to heat the battery in a low temperature environment.

[0006] Another object of the utility model is to provide a battery adopting the heat dissipation structure.

[0007] Another object of the utility model is to provide a mobile terminal using the battery.

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0009] A heat dissipation structure comprises a functional layer, wherein the functional layer comprises a heat-conducting sublayer and a first heat-generating sublayer bonded together, and a side of the heat-conducting sublayer facing away from the first heat-generating sublayer is used for bonding to a surface of a battery body.

[0010] Preferably, the functional layer further comprises a heat insulating sublayer, and the heat insulating sublayer is attached to a side of the first heat generating sublayer away from the heat conducting sublayer.

[0011] Preferably, the functional layer further includes a second heat-generating sublayer, and the second heat-generating sublayer is attached to a side of the heat-insulating sublayer away from the first heat-generating sublayer.

[0012] Preferably, the first heat-generating sub-layer and the second heat-generating sub-layer are both provided with positive and negative terminals, and the positive and negative terminals are used to be electrically connected to a power supply circuit.

[0013] Preferably, it also includes an adhesive piece, and the heat-conducting sub-layer, the first heat-generating sub-layer, the heat-insulating sub-layer and the second heat-generating sub-layer are fixed as a whole through the adhesive piece.

[0014] Preferably, the heat conductive sublayer is attached to the battery body via the adhesive.

[0015] Preferably, the adhesive is a double-sided tape, and the thermal conductive sublayer and the battery body are bonded together by the double-sided tape, the first heat-generating sublayer and the thermal conductive sublayer are bonded together by the double-sided tape, the heat-insulating sublayer and the first heat-generating sublayer are bonded together by the double-sided tape, and the second heat-generating sublayer and the heat-insulating sublayer are bonded together by the double-sided tape.

[0016] Preferably, the total thickness of the functional layer and the adhesive is a, wherein a≤2 mm.

[0017] The utility model also relates to a battery, comprising a battery body and the heat dissipation structure, wherein the battery body is a rectangular structure, the functional layer is a rectangular sheet structure, and the functional layer is adapted to be attached to one side of the battery body.

[0018] The utility model also relates to a mobile terminal, comprising a shell, a display screen, a back cover, a main board and the battery, wherein the display screen is located on the front side of the shell, the back cover is located on the back side of the shell, the battery and the main board are both located inside the shell, and the heat dissipation structure is attached between the battery body and the back cover.

[0019] Compared with the prior art, the heat dissipation structure of the present utility model has the following beneficial effects:

[0020] In the utility model, a functional layer is provided to be bonded to the surface of the battery body. Since the functional layer includes a thermally conductive sublayer and a first heating sublayer bonded together, and the thermally conductive sublayer is bonded to the battery body, the heat of the battery body can be transferred to the thermally conductive sublayer to dissipate heat for the battery body. At the same time, the thermally conductive sublayer can transfer the heat from the higher heating area on the battery body to the lower temperature area, thereby reducing the maximum temperature of the battery body and ensuring the safe use of the battery body. Then, through the provision of the first heating sublayer, the battery body can be heated in a low temperature environment to keep the battery body at a normal operating temperature. When the first heating sublayer is heated, it can transfer heat to the thermally conductive sublayer, so that the thermally conductive sublayer can evenly transfer heat to the battery body to make the overall temperature of the battery body more uniform, which is beneficial to the normal operation of the battery body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0022] In the figure, 1, functional layer; 11, heat conducting sub-layer; 12, first heating sub-layer; 13, heat insulating sub-layer; 14, second heating sub-layer; 15, positive and negative terminals; 2, adhesive piece. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of the present utility model, it should be understood that the wording "comprising" used in the present utility model specification refers to the presence of the features, integers, steps, operations, parts / components and / or assemblies, but does not exclude the presence or addition of one or more other features, integers, steps, operations, parts / components, assemblies and / or their groups. It should be understood that when we say that a part / component is "connected" to another part / component, it can be directly connected to the other part / component, or there can be intermediate parts / components. The wording "and / or" used here includes all or any unit and all combinations of one or more associated listed items.

[0025] like Figure 1 As shown, the utility model relates to a heat dissipation structure, which is used to be arranged between the battery body and the back cover of a mobile phone, including a functional layer 1, wherein the functional layer 1 includes a heat-conducting sublayer 11 and a first heat-generating sublayer 12 pasted together, and the side of the heat-conducting sublayer 11 facing away from the first heat-generating sublayer 12 is used to adhere to the surface of the battery body.

[0026] In the present invention, a functional layer 1 is provided to be bonded to the surface of the battery body. Since the functional layer 1 includes a thermally conductive sublayer 11 and a first heating sublayer 12 bonded together, and the thermally conductive sublayer 11 is bonded to the battery body, the heat of the battery body can be transferred to the thermally conductive sublayer 11 to dissipate heat for the battery body. At the same time, the thermally conductive sublayer 11 can transfer the heat from the higher heating area on the battery body to the lower temperature area, thereby reducing the maximum temperature of the battery body and ensuring the safety of the battery body. Then, through the provision of the first heating sublayer 12, the battery body can be heated in a low temperature environment to keep the battery body at a normal operating temperature. When the first heating sublayer 12 is heated, it can transfer heat to the thermally conductive sublayer 11, so that the thermally conductive sublayer 11 can transfer heat evenly to the battery body to make the overall temperature of the battery body more uniform, which is beneficial to the normal operation of the battery body.

[0027] Preferably, the functional layer 1 further includes a heat insulating sublayer 13 , and the heat insulating sublayer 13 is attached to a side of the first heat generating sublayer 12 away from the heat conducting sublayer 11 .

[0028] Since the heat dissipation structure is arranged between the battery body and the back cover, when the first heating sublayer 12 generates heat or the heat of the battery body is transferred to the thermal conductive sublayer 11 and the first heating sublayer 12, the user will feel that there is heat coming out of the back cover of the mobile phone and transmitted to the entire mobile phone, resulting in a poor user experience. Therefore, the thermal insulation sublayer 13 is attached to the side of the first heating sublayer 12 away from the thermal conductive sublayer 11, so as to prevent the heat of the battery body or the heat of the first heating sublayer 12 from being transferred to the entire mobile phone, thereby ensuring the user experience.

[0029] Furthermore, the functional layer 1 further includes a second heat-generating sublayer 14 , which is attached to a side of the heat-insulating sublayer 13 away from the first heat-generating sublayer 12 , and the second heat-generating sublayer 14 is in contact with an inner side of the back cover.

[0030] By providing the second heating sublayer 14, when the second heating sublayer 14 generates heat, the heat can be transferred to the back cover of the mobile phone and to the entire mobile phone, thereby playing a role in heating, and can be used to warm the hands of users in low temperature weather. At the same time, since the heat insulating sublayer 13 is provided between the second heating sublayer 14 and the first heating sublayer 12, the first heating sublayer 12 and the second heating sublayer 14 will not affect each other's work.

[0031] Furthermore, the side of the second heat-generating sub-layer 14 facing away from the heat-insulating sub-layer 13 is adhered to the inner side of the back cover, thereby ensuring the stability of the position between the second heat-generating sub-layer 14 and the heat-insulating sub-layer 13 .

[0032] In this embodiment, the first heat-generating sub-layer 12 and the second heat-generating sub-layer 14 are both provided with positive and negative terminals 15 , and the positive and negative terminals 15 are used to be electrically connected to a power supply circuit.

[0033] Specifically, the positive and negative terminals 15 are electrically connected to the protection circuit of the mobile phone, so that the operation of the first heating sub-layer 12 and the second heating sub-layer 14 can be controlled by the mobile phone, which is convenient for operation.

[0034] In this embodiment, the heat dissipation structure also includes an adhesive part 2, and the thermal conductive sublayer 11, the first heating sublayer 12, the thermal insulation sublayer 13 and the second heating sublayer 14 are fixed as a whole through the adhesive part 2, thereby ensuring the integrity of the heat dissipation structure, so that the layer structure is not easily dispersed due to shaking inside the mobile phone, ensuring that the heat dissipation structure can be used normally for a long time.

[0035] Preferably, the thermal conductive sublayer 11 is adhered to the battery body through the adhesive 2, and the second heat generating sublayer 14 is adhered to the inner side of the back cover through the adhesive 2, so that the heat dissipation structure can be stably connected between the battery body and the back cover, and the position of the heat dissipation structure will not shift due to shaking, thereby ensuring normal heat dissipation and heating of the battery body.

[0036] Specifically, the adhesive 2 is a double-sided tape, the thermal conductive sub-layer 11 and the battery body are bonded together by the double-sided tape, the first heat-generating sub-layer 12 and the thermal conductive sub-layer 11 are bonded together by the double-sided tape, the heat-insulating sub-layer 13 and the first heat-generating sub-layer 12 are bonded together by the double-sided tape, the second heat-generating sub-layer 14 and the heat-insulating sub-layer 13 are bonded together by the double-sided tape, and the second heat-generating sub-layer 14 and the back cover are bonded together by the double-sided tape.

[0037] The thermal conductive sublayer 11, the first heating sublayer 12, the thermal insulating sublayer 13, the second heating sublayer 14, the battery body, and the back cover are all adhered together by double-sided tape. The double-sided tape can be designed to be a thinner structure, so that the presence of the double-sided tape will not cause much influence on the heat transfer of the functional layer 1, and can firmly adhere the thermal conductive sublayer 11, the first heating sublayer 12, the thermal insulating sublayer 13, the second heating sublayer 14, the battery body, and the back cover together.

[0038] In this embodiment, the total thickness of the functional layer 1 and the adhesive 2 is a, where a≤2 mm, that is, the overall thickness of the heat dissipation structure is controlled within 2 mm so that the heat dissipation structure can be installed between the battery body and the back cover.

[0039] In this embodiment, the heat-conducting sublayer 11 may be made of aluminum foil or nickel metal foil with high thermal conductivity to improve the efficiency of heat transfer between the battery body and the heat-conducting sublayer 11 .

[0040] In this embodiment, the first heating sublayer 12 and the second heating sublayer 14 can be PI heating films, and the PI heating films include heating resistance wires and insulating films wrapping the heating resistance wires, and the positive and negative terminals 15 are electrically connected to the heating resistance wires.

[0041] In this embodiment, the heat insulating sublayer 13 is made of an aerogel felt layer to prevent heat transfer between the first heat generating sublayer 12 and the second heat generating sublayer 14, thereby preventing the normal function of the heat dissipation structure from being affected.

[0042] The utility model also relates to a battery, comprising a battery body and the heat dissipation structure, wherein the battery body is a rectangular structure, the functional layer 1 is a rectangular sheet structure, and the functional layer 1 is adapted to be attached to one side of the battery body.

[0043] Specifically, most mobile phones on the market are rectangular in shape, so correspondingly, the battery body inside the mobile phone is also generally rectangular in structure. Therefore, the functional layer 1 of the present application is a rectangular sheet structure, so that it can be well adhered and covered on one side of the battery body to ensure the heat dissipation and heating effect of the heat dissipation structure on the battery body.

[0044] The utility model also relates to a mobile terminal, comprising a shell, a display screen, a back cover, a main board and the battery, wherein the display screen is located on the front side of the shell, the back cover is located on the back side of the shell, the battery and the main board are both located inside the shell, and the heat dissipation structure is attached between the battery body and the back cover.

[0045] In the utility model, the mobile terminal can be a mobile phone or a tablet computer. By arranging a heat dissipation structure in the shell of the mobile terminal, and the heat dissipation structure is located between the battery and the back cover, the battery can be cooled and heated, and the mobile terminal can also have a heating function, which is highly practical and has a good user experience.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A heat dissipation structure, characterized in that: The functional layer (1) comprises a heat-conducting sublayer (11) and a first heat-generating sublayer (12) bonded together, wherein the side of the heat-conducting sublayer (11) facing away from the first heat-generating sublayer (12) is used for bonding to the surface of the battery body.

2. The heat dissipation structure according to claim 1, characterized in that: The functional layer (1) further comprises a heat insulating sublayer (13), wherein the heat insulating sublayer (13) is attached to a side of the first heat generating sublayer (12) away from the heat conducting sublayer (11).

3. The heat dissipation structure according to claim 2, characterized in that: The functional layer (1) further comprises a second heat-generating sublayer (14), wherein the second heat-generating sublayer (14) is attached to a side of the heat-insulating sublayer (13) away from the first heat-generating sublayer (12).

4. The heat dissipation structure according to claim 3, characterized in that: The first heating sub-layer (12) and the second heating sub-layer (14) are both provided with positive and negative terminals (15), and the positive and negative terminals (15) are used to be electrically connected to a power supply circuit.

5. The heat dissipation structure according to claim 3, characterized in that: It also comprises an adhesive member (2), through which the heat-conducting sub-layer (11), the first heat-generating sub-layer (12), the heat-insulating sub-layer (13) and the second heat-generating sub-layer (14) are fixed as a whole.

6. The heat dissipation structure according to claim 5, characterized in that: The heat-conducting sublayer (11) is bonded to the battery body via the adhesive (2).

7. The heat dissipation structure according to claim 6, characterized in that: The adhesive member (2) is a double-sided adhesive, the heat-conducting sublayer (11) and the battery body are bonded together by the double-sided adhesive, the first heat-generating sublayer (12) and the heat-conducting sublayer (11) are bonded together by the double-sided adhesive, the heat-insulating sublayer (13) and the first heat-generating sublayer (12) are bonded together by the double-sided adhesive, and the second heat-generating sublayer (14) and the heat-insulating sublayer (13) are bonded together by the double-sided adhesive.

8. The heat dissipation structure according to claim 6, characterized in that: The total thickness of the functional layer (1) and the adhesive member (2) is a, wherein a≤2 mm.

9. A battery, characterized in that: It comprises a battery body and the heat dissipation structure according to any one of claims 1 to 8, wherein the battery body is a rectangular structure, the functional layer (1) is a rectangular sheet structure, and the functional layer (1) is adapted to be attached to one side of the battery body.

10. A mobile terminal, characterized in that: It includes a shell, a display screen, a back cover, a main board and the battery as claimed in claim 9, wherein the display screen is located on the front side of the shell, the back cover is located on the back side of the shell, the battery and the main board are both located inside the shell, and the heat dissipation structure is attached between the battery body and the back cover.

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