Battery assembly, mobile terminal and battery assembly packaging method

Abstract

The present disclosure relates to a battery assembly, a mobile terminal and a battery assembly packaging method. The battery assembly comprises a battery, a protection circuit board electrically connected with the battery, and a heat conduction assembly comprising a first heat conduction member in contact with the protection circuit board and configured to conduct heat generated by the protection circuit board to a middle frame of the mobile terminal. The present disclosure conducts the heat generated by the protection circuit board of the battery to the middle frame of the mobile terminal through the first heat conduction member, thereby dissipating the heat of the protection circuit board and improving the charging efficiency of the battery and ensuring the safety of the battery.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of batteries, and in particular to a battery assembly, a mobile terminal and a battery assembly packaging method. BACKGROUND

[0002] With the continuous progress of science and technology, electronic devices have entered the era of fast charging. The battery charging power gradually increases, and the heat of the protection circuit board which protects the charging and discharging of the battery is also more and more obvious.

[0003] Moreover, with the miniaturization trend of electronic devices, the internal stack is more and more compact, and the space of the battery protection circuit board is also limited, resulting in a sharp increase in the heat of the battery protection circuit board, which seriously affects the safety of the battery. SUMMARY

[0004] To overcome the problems in the related art, the present disclosure provides a battery assembly, a mobile terminal and a battery assembly packaging method.

[0005] According to a first aspect of the present disclosure, a battery assembly is provided, comprising: a battery; a protection circuit board electrically connected with the battery; a heat conduction assembly, the heat conduction assembly comprising a first heat conduction member, the first heat conduction member being in contact with the protection circuit board for conducting heat generated by the protection circuit board to a middle frame of a mobile terminal.

[0006] In an embodiment, the battery comprises a cell and a tab extending outwardly from the cell, the tab being electrically connected with the protection circuit board; the first heat conduction member comprises a first contact portion and a second contact portion formed by bending, at least part of the first contact portion being in contact with the protection circuit board, at least part of the second contact portion being used for contact connection with the middle frame, and the first contact portion and the second contact portion being located on two sides of the tab respectively.

[0007] In an embodiment, the battery assembly further comprises an insulating sticker, the insulating sticker being used for packaging the first contact portion and the protection plate on the tab.

[0008] In an embodiment, the first contact portion and the second contact portion have a gap therebetween, the insulating sticker passes through the gap and wraps around an end of the tab from one side of the tab to the other side of the tab, and covers the end of the tab and at least part of the first contact portion.

[0009] In an embodiment, the heat conduction assembly further comprises a second heat conduction member, the second heat conduction member being located between the first heat conduction member and the middle frame, and the first heat conduction member being in contact with the middle frame through the second heat conduction member.

[0010] In an embodiment, the heat conduction assembly further comprises a heat conduction foam, which is located between the tab and the middle frame, and is in contact with the first heat conduction member, for filling the gap between the tab and the middle frame.

[0011] In an embodiment, the heat conduction foam is in a U shape, comprising a first buffer part and a second buffer part connected with the first buffer part, wherein the first buffer part is in contact with the second contact part of the first heat conduction member, and is located between the tab and the second contact part, and the second buffer part is in contact with the middle frame, and is located between the first heat conduction member and the middle frame.

[0012] According to a second aspect of the embodiments of the present disclosure, a mobile terminal is provided, comprising: a middle frame; a battery assembly, which is the battery assembly according to any one of the embodiments of the first aspect; wherein the first heat conduction member of the heat conduction assembly is in contact with a protection circuit board and the middle frame, for conducting the heat generated by the protection circuit board to the middle frame through the first heat conduction member.

[0013] According to a third aspect of the embodiments of the present disclosure, a battery assembly packaging method is provided, for packaging the battery assembly according to any one of the embodiments of the first aspect, the packaging method comprising: connecting the first heat conduction member of the heat conduction assembly with the protection circuit board; and packaging the first heat conduction member and the protection circuit board to the tab of the battery.

[0014] In an embodiment, the first heat conduction member comprises a first contact part and a second contact part; and the connecting the first heat conduction member of the heat conduction assembly with the protection circuit board comprises: connecting at least part of the first contact part with the protection circuit board, and bending the first heat conduction member so that the second contact part and the first contact part are located on two sides of the tab of the battery, respectively.

[0015] In an embodiment, the packaging the first heat conduction member and the protection circuit board to the tab of the battery comprises: passing through the gap between the first contact part and the second contact part by an insulating tape, and winding around the end of the tab from one side of the tab to the other side of the tab, so as to cover the end of the tab and at least part of the first contact part.

[0016] In an embodiment, the battery assembly further comprises a heat conduction foam, and the packaging method further comprises: connecting the heat conduction foam with the second contact part.

[0017] In an embodiment, the heat-conductive foam includes a first buffering part and a second buffering part, and the connecting the heat-conductive foam to the second contact part includes: attaching the first buffering part to a first surface of the second contact part, and attaching the second buffering part to a second surface of the second buffering part opposite to the first surface.

[0018] The technical solution provided by the embodiments of the present disclosure can have the following beneficial effects: heat generated by the protection circuit board of the battery is conducted to the middle frame of the mobile terminal through the first heat-conductive member, the protection circuit board is cooled, the charging efficiency of the battery is improved, and the safety of the battery is ensured.

[0019] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and are not limiting to the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure and serve to explain the principles of the present disclosure together with the description.

[0021] Figure 1 is a sectional view of a battery assembly according to an exemplary embodiment of the present disclosure.

[0022] Figure 2 is a schematic view of a battery assembly and a middle frame cooperation structure according to an exemplary embodiment of the present disclosure.

[0023] Figure 3 is a schematic view of a partial structure of a battery assembly according to an exemplary embodiment of the present disclosure.

[0024] Figures 4a-4d is a schematic view of a battery assembly packaging process according to an exemplary embodiment of the present disclosure.

[0025] Figure 5 is a schematic view of a structure of a mobile terminal according to an exemplary embodiment of the present disclosure.

[0026] Figure 6 is a flowchart of a battery assembly packaging method according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] The exemplary embodiments will be described in detail herein below with reference to the accompanying drawings. The following description is with reference to the drawings, in which like numerals refer to like elements throughout. The embodiments described in the following exemplary embodiments do not represent all of the implementations in accordance with the present disclosure. Rather, they are merely examples consistent with some aspects of the present disclosure as detailed in the appended claims.

[0028] Figure 1 is a sectional view of a battery assembly according to an exemplary embodiment of the present disclosure. Figure 5 is a structural schematic diagram of a mobile terminal according to an exemplary embodiment of the present disclosure.

[0029] As shown in Figure 1 and Figure 5 , the battery assembly 100 of the present embodiment can be applied to a mobile terminal 200 for providing power for the mobile terminal 200. The mobile terminal 200 can be a smart phone, a tablet computer, a notebook computer, a wearable device such as a smart bracelet or a smart watch, a camera, a mobile power supply, a personal digital assistant, or other electronic products with a rechargeable battery. In the following description, the mobile terminal 200 is taken as an example of a smart phone, but the present disclosure is not limited thereto.

[0030] As shown in Figure 5 , the mobile terminal 200 can include a middle frame 210. The middle frame 210 serves as an internal support of the mobile terminal 200 to fix and support various components. For example, a display screen 220 can be supported on the front of the middle frame 210, and the battery assembly 100 can be fixed on the back of the middle frame 210. The back of the middle frame 210 can also support and fix a main board, a camera, and other components.

[0031] Figure 2 is a structural schematic diagram of a battery assembly and a middle frame according to an exemplary embodiment of the present disclosure. Figure 3 is a partial structural schematic diagram of a battery assembly according to an exemplary embodiment of the present disclosure. As shown in Figure 1 , Figure 2 and Figure 3 , the battery assembly 100 of the present embodiment can include a battery 10, a protection circuit board 20, and a heat conduction assembly.

[0032] The battery 10 can be installed on the back of the middle frame 210, for example, in a battery compartment of the middle frame 210. The back of the battery 10 can be fixed to the back of the middle frame 210 by a pull-tab adhesive, wherein the back of the battery 10 is opposite to the back of the middle frame 210. The protection circuit board 20 is electrically connected to the battery 10 for detecting and controlling the battery voltage and the working current of the charge-discharge circuit, and protecting the battery 10 to ensure the safe use of the battery 10.

[0033] The heat-conducting component can absorb heat generated by the protection circuit board 20 during operation. The heat-conducting component can include a first heat-conducting member 30 in contact with the protection circuit board 20 for conducting heat generated by the protection circuit board 20 to the middle frame 210 of the mobile terminal 200 to dissipate heat from the protection circuit board 20. The first heat-conducting member 30 is in contact with the protection circuit board 20 to maintain the first heat-conducting member 30 continuously conducting heat generated by the protection circuit board 20. The contact can be understood as the first heat-conducting member 30 directly contacting the protection circuit board 20. Alternatively, the first heat-conducting member 30 indirectly contacts the protection circuit board 20. In addition, the first heat-conducting member 30 can be in point contact or surface contact with the protection circuit board 20, and the surface contact can increase the contact area of the first heat-conducting member 30 and the protection circuit board 20, and improve the heat conduction efficiency. When the battery assembly 100 is installed in the mobile terminal 200, the first heat-conducting member 30 is in contact with the middle frame 210. Similarly, the first heat-conducting member 30 can directly contact or indirectly contact the middle frame 210, so that the first heat-conducting member 30 continuously conducts heat generated by the protection circuit board 20 to the middle frame 210, and the first heat-conducting member 30 can also be in point contact or surface contact with the middle frame 210.

[0034] Due to the installation of functional devices on the protection circuit board 20, these functional devices are usually respectively electrically connected to the main board of the mobile terminal 200 through flexible circuit board traces. The functional devices can include control IC (encryption IC), MOS switch, resistor, capacitor, auxiliary device NTC, ID memory, and power meter IIC. The control IC controls the MOS switch to be turned on under normal circumstances, so that the battery cell is in communication with the external circuit, and when the voltage of the battery cell or the current of the circuit exceeds the specified value, the MOS switch is quickly turned off to protect the safety of the battery cell. The capacitor and the auxiliary device (Negative temperature coefficient, NTC) also have a negative temperature coefficient, and when the ambient temperature rises, the resistance decreases, so that the charging device can react in time and control the internal interruption to stop charging and discharging. The ID memory stores information such as battery type and production date, and plays a role in battery traceability and application limitation. During the operation of the battery 10, the functional devices on the protection circuit board 20 described above will generate a large amount of heat, which seriously affects the charging efficiency and safety of the battery 10. Therefore, it is necessary to dissipate heat from the protection circuit board 20.

[0035] The battery assembly 100 of the embodiment of the present disclosure can conduct heat generated by the protection circuit board 20 of the battery to the middle frame 210 of the mobile terminal 200 through the first heat-conducting member 30 during operation, and dissipate the heat through the middle frame 210, thereby continuously and effectively cooling the protection circuit board 20, improving the charging efficiency of the battery 10, and ensuring the safety of the battery 10.

[0036] The first heat-conducting member 30 can be made of insulating silica gel, heat-conducting silica gel or other insulating and heat-conducting materials. These materials can effectively absorb the heat generated by the protection circuit board 20 and avoid interference with the components on the protection circuit board 20.

[0037] In an embodiment, as shown in FIG. 1, the battery 10 includes a cell 11 and a tab 12 extending out of the cell 11, the tab 12 being electrically connected to the protection circuit board 20. Figure 1

[0038] The battery 10 can be a lithium ion battery, including a housing and a cell 11 contained in the housing. The housing protects the cell 11. The housing can be a soft package housing, which wraps the cell to form a soft package cell, also known as a polymer cell. The soft package housing can be an aluminum plastic film, which is composed of a nylon layer, an aluminum layer and a plastic material layer. The nylon layer as the outermost layer of the appearance ensures the shape of the soft package housing, the aluminum layer plays a waterproof role to prevent external water from entering the cell, and the plastic material layer melts at high temperature and has certain viscosity, and after cooling and solidification, it is adhered to the cell. The plastic material layer can be polypropylene (PP), polyethylene (PE) or polypropylene terephthalate (PET). However, it is not limited thereto, and the housing of the battery can be plastic or metal. The plastic and metal can have a certain hardness to resist external impact to achieve the purpose of protecting the battery.

[0039] ​The electric cell 11 can include at least one positive electrode layer, at least one negative electrode layer, and at least one separator layer between the positive electrode layer and the negative electrode layer. The electric cell 11 can be a jelly-roll type or a stacked type. For example, the positive electrode layer, the separator layer, and the negative electrode layer are sequentially stacked to form the jelly-roll type. For another example, the positive electrode layer, the separator layer, and the negative electrode layer are sequentially stacked to form the stacked type. The positive electrode layer can be a thin sheet made of one or more of lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate, and a ternary material (a polymer of nickel-cobalt-manganese), which are common in the art, and the disclosure does not limit the material of the positive electrode layer. The negative electrode layer is made of a carbon material or a non-carbon material, a binder, and an additive. For example, the negative electrode layer can be a carbon negative electrode material, an alloy-based negative electrode material, a tin-based negative electrode material, a lithium-containing transition metal nitride negative electrode material, a nanoscale material, a nano negative electrode material, etc. The disclosure does not limit the material of the negative electrode layer. The separator layer is a microporous separator film for separating the positive electrode layer and the negative electrode layer and has micropores, and can be made of a high-molecular functional material having a nanoscale microporous structure. The separator layer is used to prevent the positive electrode layer and the negative electrode layer from contacting each other to cause a short circuit, while allowing electrolyte ions to pass through. The separator layer can be a polyolefin microporous film, a polyethylene felt, a glass fiber felt, or an ultra-fine glass fiber paper, which are common in the art, and the disclosure does not limit the material of the separator layer. The positive electrode layer and the negative electrode layer of the electric cell 11 respectively extend to the outside of the electric cell 11 to form positive and negative electrode tabs. The positive and negative electrode tabs can be respectively welded to the same side of the protection circuit board 20 by the nickel sheet 13.

[0040] Figures 4a-4d is a schematic diagram of a battery assembly packaging process according to an example embodiment of the disclosure. As shown in Figure 1 Figure 2 and Figure 4a , the first heat-conducting member 30 includes a first contact portion 31 and a second contact portion 32 formed by bending, at least a portion of the first contact portion 31 is in contact with the protection circuit board 20, at least a portion of the second contact portion 32 is used to contact the middle frame 210, and the first contact portion 31 and the second contact portion 32 are respectively located on both sides of the electrode tab 12.

[0041] The first heat-conducting member 30 can have a sheet structure, and the first heat-conducting member 30 is bent into two contact portions, i.e., the first contact portion 31 and the second contact portion 32, by a bending process. As shown in Figure 2 Figures 4a-4d , at least a portion of the first contact portion 31 can be in contact with the side of the protection circuit board 20 opposite to the side on which the electrode tab 12 is welded, for example, the first contact portion 31 can cover the side of the protection circuit board 20 opposite to the side on which the electrode tab 12 is welded (as shown in Figure 2 ). Then, the second contact portion 32 is bent around to the other side of the electrode tab 12 by bending the first heat-conducting member 30, which facilitates contact with the middle frame 210. ​​

[0042] As shown in Figure 2 , the battery 10 generally includes a deep pit area and a shallow pit area. The shallow pit area is located at the back of the battery 10, i.e. the side facing the middle frame 210. The deep pit area is opposite to the shallow pit area and is located at the front of the battery 10. Generally, the protection circuit board 20 is packaged in the deep pit area of the tab 12 to reduce the space occupation. When the battery assembly 100 is installed in the middle frame 210, the protection circuit board 20 and the middle frame 210 are located on the two sides of the tab 12 respectively, wherein the protection circuit board 20 is away from the middle frame 210.

[0043] In the embodiments of the present disclosure, the first heat-conducting member 30 is bent to form two contact parts, i.e. the first contact part 31 and the second contact part 32. The first contact part 31 is in contact with the protection circuit board 20 in the deep pit area, and the second contact part 32 is bent to pass the tab 12 to the shallow pit area of the battery 10 and is in contact with the middle frame 210. The heat generated by the protection circuit board 20 is first absorbed by the first contact part 31, then conducted to the second contact part 32 through the bent part of the first heat-conducting member 30, and then conducted to the middle frame 210 through the second contact part 32, thereby effectively dissipating the heat of the protection circuit board 20 and improving the charging efficiency and safety performance of the battery 10.

[0044] In an embodiment, as shown in Figure 1 , the battery assembly 100 further includes an insulating sticker 60 for packaging the first contact part 31 and the protection circuit board 20 in the tab 12. On the one hand, the insulating sticker 60 plays an insulating protection role for the tab 12, avoiding the tab 12 being exposed to the outside and causing a short circuit. On the other hand, the insulating sticker 60 can fix the protection circuit board 20 to the tab 12, preventing the tab 12 from losing connection with the protection circuit board 20 due to shaking of the battery 10 in a micro-dropping test or after being installed in the mobile terminal 200, and ensuring the reliability of the electrical connection between the tab 12 and the protection circuit board 20.

[0045] In an example, as shown in Figures 4a-4d , the first contact part 31 and the second contact part 32 of the first heat-conducting member 30 have a gap therebetween for the insulating sticker 60 to pass through. The insulating sticker 60 passes through the gap from one side of the tab 12 (such as the shallow pit area side) to the other side of the tab 12 (the deep pit area side) around the end of the tab 12, and covers the end of the tab 12 and at least part of the first contact part 31, thereby packaging and fixing the protection circuit board 20 to the tab 12 and insulatingly protecting the tab 12. The insulating sticker 60 can be a mica tape.

[0046] In an embodiment, as shown in Figure 1 and Figure 2As shown, the heat conduction assembly further comprises a second heat conduction member 40, which is located between the first heat conduction member 30 and the middle frame 210, and the first heat conduction member 30 is connected to the middle frame 210 through the second heat conduction member 40. The first heat conduction member 30 absorbs the heat generated by the protection circuit board 20 and conducts the heat to the second heat conduction member 40, and finally conducts the heat to the middle frame 210 through the second heat conduction member 40 for heat dissipation. The second heat conduction member 40 comprises a first surface and a second surface opposite to the first surface, wherein the first surface of the second heat conduction member 40 can be directly or indirectly connected to the second contact part 32 of the first heat conduction member 30 mentioned above, and the second surface of the second heat conduction member 40 can be directly or indirectly connected to the middle frame 210. The second heat conduction member 40 can be a graphite sheet, which has better heat conduction performance than insulating silica gel sheets, heat-conducting silica gel sheets and other insulating heat-conducting sheets, and can quickly conduct the heat generated by the protection circuit board 20 to the middle frame 210, thereby improving the heat dissipation efficiency of the protection circuit board 20 and greatly improving the charging efficiency.

[0047] In some embodiments, as Figure 2 As shown, the heat conduction assembly further comprises a heat-conducting foam 50, which is located between the tab 12 and the middle frame 210 and is connected to the first heat conduction member 30 to fill the gap between the tab 12 and the middle frame 210. The heat-conducting foam 50 plays a supporting and buffering role for the tab 12 and can also play a role in conducting heat. As mentioned above, various components are integrated on the protection circuit board 20, and with the development of fast charging of the battery, there is a trend of increasing various components, resulting in an increase in the weight of the protection circuit board 20. After the battery 10 is installed in the middle frame 210, there is usually a gap between the tab 12 and the middle frame 210, i.e. the tab 12 is in a suspended state. As a result, when the battery 10 is subjected to a micro-dropping test or when the mobile terminal 200 is shaken or dropped, the protection circuit board 20 presses the tab 12 under its own gravity, which may cause the tab 12 to tear or break, seriously affecting the reliability of the battery 10. The present disclosure fills the gap between the tab 12 and the middle frame 210 with the heat-conducting foam 50 to effectively support and buffer the tab 12, preventing the tab 12 from tearing or breaking, improving the reliability of the tab 12 connection and ensuring the performance of the battery 10. The heat-conducting foam 50 is connected to the first heat conduction member 30 and can also conduct the heat absorbed by the first heat conduction member 30 from the protection circuit board 20 to the middle frame 210, further improving the heat dissipation performance.

[0048] In an example, as Figure 2As shown, the cross section of the heat-conducting foam 50 is in the shape of a U, including a first buffer part 52 and a second buffer part 51 connected with the first buffer part 52, wherein the first buffer part 52 is in contact with the second contact part 32 of the first heat-conducting part 30 and is located between the tab 12 and the second contact part 32, and the second buffer part 51 is in contact with the middle frame 210 and is located between the second contact part 32 and the middle frame 210, for example, the second buffer part 51 is pasted to the second heat-conducting part 40. The heat-conducting foam 50 is used to press and guarantee the contact between the graphite sheet and the heat-conducting gasket to reduce the contact thermal resistance. The first buffer part 52 is located between the tab 12 and the second contact part 32, and effectively supports and buffers the tab 12 and the second contact part 32 of the first heat-conducting part 30. The second buffer part 51 is located between the tab 12 and the middle frame 210, and effectively supports and buffers between the tab 12 and the middle frame 210. The first buffer part 52 and the second buffer part 51 form more effective protection for the tab 12, and also play a buffering protection role for the first heat-conducting part 30, and can ensure the heat dissipation reliability.

[0049] In summary, as shown in the Figures 4a-4d When the battery assembly 100 is packaged, the aluminum-plastic film is first used to soft-pack the battery cell 11. Then, the first contact part 31 of the first heat-conducting part 30 covers and contacts the surface of the protection circuit board 20 (as shown in the Figure 4a Then, the insulating paste 60 is wound around the end of the tab 12 from the shallow pit area side of the battery 10 and passes through the gap between the first contact part 31 and the second contact part 32 (as shown in the Figure 4b Then, the first buffer part 52 of the heat-conducting foam 50 is pasted to the first heat-conducting part 30 to press the surface of the second contact part 32 or the tab 12 close to the shallow pit area, and then the first heat-conducting part 30 is bent so that the second contact part 32 is bent towards the shallow pit area of the battery 10. At the same time, the second heat-conducting part 40 (such as a graphite sheet) can be placed between the second contact part 32 and the first buffer part 52, and then the second buffer part 51 of the heat-conducting foam 50 is bent and pasted to the surface of the second contact part 32. The first buffer part 52 and the second buffer part 51 press the graphite sheet and the second contact part 32 together to form a close contact.

[0050] According to the embodiments of the present disclosure, a mobile terminal is also provided. As shown in the Figure 5As shown, the mobile terminal 200 includes a middle frame 210 and a battery assembly 100, which is the battery assembly 100 mentioned in any of the above embodiments. The middle frame 210 serves as an inner support of the mobile terminal 200 and plays a role of fixing and supporting various components and protecting the components. For example, a display screen 220 can be supported on the front of the middle frame 210, and the battery assembly 100 is fixed on the back of the middle frame 210. The back of the middle frame 210 is also used to support and fix a mainboard, a camera, and other components. The first heat conduction member 30 of the heat conduction assembly in the battery assembly 100 is in contact with the protection circuit board 20 and the middle frame 210, and is used to conduct the heat generated by the protection circuit board 20 to the middle frame 210 through the first heat conduction member 30.

[0051] Based on the same inventive concept, the mobile terminal 200 of the embodiment of the disclosure can conduct the heat generated by the protection circuit board 20 of the battery to the middle frame 210 of the mobile terminal 200 through the first heat conduction member 30, and dissipate the heat through the middle frame 210, thereby effectively dissipating the heat of the protection circuit board 20 and improving the charging efficiency of the mobile terminal 200.

[0052] Based on the same inventive concept, the embodiment of the disclosure also provides a battery assembly packaging method for packaging the battery assembly 100 mentioned in any of the above embodiments. Figure 6 FIG. 3 is a flow chart of a battery assembly packaging method according to an exemplary embodiment of the disclosure. The battery assembly packaging method 300 is used to package the battery assembly 100 mentioned in any of the above embodiments. Figures 4a-4b and Figure 6 As shown, the packaging method 300 includes a step S11 and a step S12.

[0053] In the step S11, the first heat conduction member 30 of the heat conduction assembly is in contact with the protection circuit board 20.

[0054] The first heat conduction member 30 can be in point contact or surface contact with the protection circuit board 20. The first heat conduction member 30 is in contact with the protection circuit board 20, continuously conducts the heat generated by the protection circuit board 20 when working, and reduces the temperature of the protection circuit board 20.

[0055] In an example, the first heat conduction member 30 includes a first contact portion 31 and a second contact portion 32. At least part of the first contact portion 31 is in contact with the protection circuit board 20, and the second contact portion 32 and the first contact portion 31 are respectively located on two sides of the tab 12 of the battery 10 by bending the first heat conduction member 30.

[0056] As shown in FIG. 2, Figure 4a The surface of the first contact portion 31 can be in contact with the side of the protection circuit board 20 opposite to the side on which the tab 12 is welded, for example, the first contact portion 31 can cover the side of the protection circuit board 20 opposite to the side on which the tab 12 is welded. Figure 2The first heat conducting member 30 is then bent so that the second contact portion 32 is wrapped around to the other side of the tab 12 to facilitate the contact between the second contact portion 32 and the middle frame 210.

[0057] Generally, the protection circuit board 20 is encapsulated in the deep pit area of the tab 12, which is opposite to the shallow pit area, i.e. the area close to the middle frame 210. That is, the protection circuit board 20 and the middle frame 210 are respectively located on the two sides of the tab 12, and the protection circuit board 20 is farther away from the middle frame 210. Therefore, by bending the first heat conducting member 30 so that the second contact portion 32 is wrapped around to the other side of the tab 12, the first heat conducting member 30 is facilitated to contact the middle frame 210 when the battery 10 is assembled in the middle frame 210, thereby improving the charging efficiency and safety performance of the battery 10.

[0058] In step S12, the first heat conducting member 30 and the protection circuit board 20 are encapsulated in the tab 12 of the battery 10.

[0059] The tab 12 of the battery 10 is welded to the surface of the protection circuit board 20 through the nickel sheet 13. By encapsulating the first heat conducting member 30 and the protection circuit board 20 in the tab 12, on the one hand, the tab 12 is prevented from being exposed to the outside, thereby avoiding short circuit. On the other hand, the protection circuit board 20 is fixed to the tab 12, thereby preventing the tab 12 from being disconnected from the protection circuit board 20 due to shaking of the battery 10 in the micro-dropping test or after being installed in the mobile terminal 200, and ensuring the reliability of the electrical connection between the tab 12 and the protection circuit board 20.

[0060] In an embodiment, as shown in FIG. 2, the first heat conducting member 30 is encapsulated in the tab 12 of the battery 10 by the protection circuit board 20. Figure 4b In step S12, the first heat conducting member 30 and the protection circuit board 20 are encapsulated in the tab 12 of the battery 10.

[0061] The first heat conducting member 30 is then bent so that the second contact portion 32 is wrapped around to the other side of the tab 12 to facilitate the contact between the second contact portion 32 and the middle frame 210. Figure 4c The first heat conducting member 30 is then bent so that the second contact portion 32 is wrapped around to the other side of the tab 12 to facilitate the contact between the second contact portion 32 and the middle frame 210.

[0062] In an embodiment, the battery assembly further comprises a heat-conductive foam, and the encapsulation method 300 further comprises: connecting the heat-conductive foam 50 in contact with the second contact portion 32, and filling the shallow pit area of the battery 10. The gap between the tab 12 and the middle frame 210 is filled by the heat-conductive foam 50, which forms effective support and buffering for the tab 12, prevents the tab 12 from tearing or breaking, improves the reliability of the tab 12 connection, and ensures the performance of the battery 10. By connecting the heat-conductive foam 50 in contact with the first heat-conductive member 30, the first heat-conductive member 30 can also conduct the heat absorbed by the protection circuit board 20 to the middle frame 210, further improving the heat dissipation performance.

[0063] In an example, the heat-conductive foam 50 comprises a first buffering portion 52 and a second buffering portion 51. The first buffering portion 52 can be attached to the tab 12, and the second buffering portion 51 can be attached to the outer side of the second contact portion 32.

[0064] The first buffering portion 52 can be attached to the shallow pit area side of the tab 12 before the first heat-conductive member 30 is bent. Then, the second contact portion 32 is bent to the shallow pit area side of the tab 12, and is in contact with the first buffering portion 52. Next, the second buffering portion 51 of the heat-conductive foam 50 is bent and attached to the outer side of the second contact portion 32. In this way, the second buffering portion 51 is located between the tab 12 and the middle frame 210, thereby forming effective support and buffering between the tab 12 and the middle frame 210. The first buffering portion 52 and the second buffering portion 51 provide more effective protection for the tab 12, while also providing buffering protection for the first heat-conductive member 30, and ensuring reliable heat dissipation.

[0065] It can be understood that, in order to implement the above functions, the electronic device provided by the embodiments of the present disclosure includes corresponding hardware structures and / or software modules for executing various functions. In combination with the units and algorithm steps of the examples disclosed in the embodiments of the present disclosure, the embodiments of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is implemented in hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the technical solutions of the embodiments of the present disclosure.

[0066] It can be understood that, in the present disclosure, "multiple" refers to two or more, and other quantifiers are similar. The association relationship between the associated objects is described by "and / or", which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the front and rear associated objects. The singular forms "a", "said" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0067] It will be further understood that the terms "first", "second", etc. are used to describe various information but do not imply a particular order or importance of the information. In fact, the terms "first", "second", etc. are used merely as labels to distinguish between two conceptually different objects or entities. For example, a first information can be termed as a second information, and similarly, a second information can also be termed as a first information without departing from the scope of the present disclosure.

[0068] It will be further understood that the terms "center", "longitudinal", "lateral", "front", "back", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate directions or positions based on the directions or positions shown in the drawings, and are used for convenience in describing the present embodiments and simplifying the description, and do not indicate or imply necessarily the specific orientation, configuration or operation of the device or element in which the terms are used.

[0069] It will be further understood that "connected" or "coupled" or "linked" or the like means of two or more elements can be direct or indirect, and that the reference to connection or coupling or linking can include an indirect connection or coupling or linking via another element or elements.

[0070] It will be further understood that, although the operations of the embodiments of the present disclosure are described in a particular, sequential order for convenient presentation, unless otherwise specified, the operations can be performed in any order so as to be appropriate. For example, the descriptions could be reversed or performed in parallel, depending on the context.

[0071] Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the present disclosure cover any and all variations of the present disclosure including combinations of features falling within the general scope of the disclosure. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

[0072] It is to be understood that the present disclosure is not limited to the precise construction described and as shown in the attached drawings, and that various modifications and changes can be effected therein by those skilled in the art without departing from the scope of the application. The scope of the application is to be limited only by the appended claims.

Claims

1. A battery assembly, characterized in that, include: Battery; A protective circuit board is electrically connected to the battery. A heat-conducting component, comprising a first heat-conducting element, which is in contact with the protective circuit board and is used to conduct the heat generated by the protective circuit board to the mid-frame of the mobile terminal. The battery includes a cell and tabs extending outward from the cell. The tabs are electrically connected to the protection circuit board and are soldered to one side of the protection circuit board. The first heat-conducting component includes a first contact portion and a second contact portion. At least a portion of the first contact portion is in contact with the protective circuit board. The first contact portion and the second contact portion are located on both sides of the electrode tab, respectively. At least a portion of the first contact portion contacts one side of the protective circuit board, and the side of the protective circuit board to which the electrode tab is soldered is opposite to the side that contacts the first contact portion; The battery assembly also includes an insulating sticker for encapsulating the first contact portion and the protective circuit board within the electrode tab, and for fixing the protective circuit board to the electrode tab. There is a gap between the first contact portion and the second contact portion, the insulating tape passes through the gap, and extends from one side of the electrode tab around the end of the electrode tab to the other side of the electrode tab, and covers the end of the electrode tab and at least part of the first contact portion.

2. The battery assembly according to claim 1, characterized in that, At least a portion of the second contact portion is used for contact connection with the middle frame.

3. The battery assembly according to claim 1, characterized in that, The thermal conductive assembly further includes a second thermal conductive element, which is located between the first thermal conductive element and the middle frame. The first thermal conductive element is in contact with the middle frame through the second thermal conductive element.

4. The battery assembly according to claim 2, characterized in that, The thermally conductive component further includes thermally conductive foam, which is located between the tab and the middle frame and is in contact with the first thermally conductive component to fill the gap between the tab and the middle frame.

5. The battery assembly according to claim 4, characterized in that, The thermally conductive foam has a U-shaped cross-section, including a first buffer portion and a second buffer portion connected to the first buffer portion. The first buffer portion is in contact with the second contact portion of the first thermally conductive component and is located between the tab and the second contact portion. The second buffer portion is in contact with the middle frame and is located between the second buffer portion and the middle frame.

6. A mobile terminal, characterized in that, include: Mid-frame; The battery assembly is the battery assembly as described in any one of claims 1-5; The first heat-conducting element of the heat-conducting assembly is in contact with the protective circuit board and the middle frame, and is used to conduct the heat generated by the protective circuit board to the middle frame through the first heat-conducting element.

7. A battery assembly packaging method, characterized in that, The encapsulation method is used to encapsulate the battery assembly according to any one of claims 1-5, the encapsulation method comprising: The first thermally conductive element of the thermally conductive assembly is connected in contact with the protective circuit board; The first heat-conducting component and the protective circuit board are encapsulated in the tabs of the battery.

8. The battery module encapsulation method according to claim 7, characterized in that, The first heat-conducting element includes a first contact portion and a second contact portion; The step of connecting the first thermally conductive element of the thermally conductive assembly to the protective circuit board includes: At least a portion of the first contact portion is brought into contact with the protective circuit board, and the first heat-conducting member is bent so that the second contact portion and the first contact portion are respectively located on both sides of the battery tab.

9. The battery module encapsulation method according to claim 8, characterized in that, The step of encapsulating the first thermally conductive element and the protective circuit board in the battery tabs includes: An insulating tape is passed through the gap between the first contact portion and the second contact portion, and extends from one side of the battery tab, around the end of the tab, to the other side of the tab, to cover the end of the tab and at least part of the first contact portion.

10. The battery module encapsulation method according to claim 8, characterized in that, The battery assembly further includes thermally conductive foam, and the encapsulation method further includes: The thermally conductive foam is brought into contact with the second contact portion and fills the shallow pit area of ​​the battery.

11. The battery module encapsulation method according to claim 10, characterized in that, The thermally conductive foam includes a first buffer section and a second buffer section. The step of making the thermally conductive foam contact and connect it to the second contact portion includes: The first buffer portion is attached to the electrode tab, and the second buffer portion is attached to the outer side of the second contact portion.

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