Drop protection battery

Abstract

The utility model discloses a falling protection battery which is arranged in a battery compartment of a mobile phone and comprises a battery cell, an FPC (Flexible Printed Circuit) and a protection bracket, the FPC circuit board is sleeved in the protection support, the protection support is used for buckling and limiting the FPC circuit board, the protection support is fixedly adhered to the top of the battery cell and is adjacent to a tab of the battery cell, the tab of the battery cell is electrically connected with a nickel sheet on the FPC circuit board, and the outer surface of the protection support is wrapped with a layer of high-temperature insulation mylar. When the mobile phone falls off, the battery generates displacement, the protection support is firstly contacted with the shell, and the protection support has certain structural strength, and the FPC circuit board which is easy to damage is assembled in the protection support, so that the FPC circuit board is effectively protected from being damaged by the impact of the shell.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a battery with a drop protection function. Background Art

[0002] With the increasing size of the screens of smart phones and the increasing usage frequency of users, the demand for battery capacity is increasing. However, the increase in battery capacity will lead to an increase in the weight of the mobile phone, and the increase in the weight of the mobile phone will lead to an increase in the probability of battery failure when the mobile phone drops.

[0003] At present, the mobile phone battery is non-removable, usually a polymer lithium-ion battery. Positive and negative nickel patches are surface-mounted on the FPC (Flexible Printed Circuit) board of the battery, and the positive and negative tabs of the battery cell are welded to the positive and negative nickel patches by spot welding. The FPC board is connected to the main board of the mobile phone through a BTB (Board-to-Board) connector, and the battery is adhered to the housing of the mobile phone by double-sided tape. During the dropping process of the mobile phone, due to the action of gravity acceleration, the battery will displace inside the mobile phone and impact the housing, resulting in the breakage of the positive and negative tabs welded between the battery cell and the FPC board, or the deformation and breakage of the FPC board, causing battery failure.

[0004] Although the existing FPC board is wrapped by a high-temperature insulating mylar, it does not provide good protection for the FPC board, and can only meet the conventional drop test at a height of 1 meter, and cannot meet the higher requirements of the drop test.

[0005] Therefore, the existing technology still needs to be improved. Content of the Utility Model

[0006] In view of the deficiencies of the above-mentioned existing technology, the purpose of the utility model is to provide a battery with a drop protection function to solve the problem that the existing battery does not effectively protect the FPC board.

[0007] To achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A battery with a drop protection function is installed in the battery compartment of a mobile phone, and includes a battery cell and an FPC board. It further includes a protection bracket. The FPC board is sleeved inside the protection bracket, and the protection bracket performs snap-limitation on the FPC board. The protection bracket is adhered to the top of the battery cell and adjacent to the tabs of the battery cell. The tabs of the battery cell are electrically connected to the nickel patches on the FPC board, and the outer surface of the protection bracket is wrapped with a layer of high-temperature insulating mylar.

[0009] In the battery with a drop protection function, the protection bracket is a long strip-shaped groove, and both ends of the top of one side of the protection bracket are respectively provided with a buckle for performing snap-limitation on the FPC board.

[0010] In the described battery with drop protection, notches are respectively provided at the top of the groove edges opposite to the buckle positions for exposing the nickel sheets on the FPC circuit board.

[0011] In the described battery with drop protection, isolation posts are provided on the inner side of the groove edge below the notch, and the isolation posts are in contact with the nickel sheets of the corresponding poles.

[0012] In the described battery with drop protection, an opening is provided on one side of the protection bracket, and the male socket of the FPC circuit board passes through the opening.

[0013] In the described battery with drop protection, the bottom and side surfaces of the protection bracket are respectively pasted and fixed to the flat step surface at the top of the battery cell and the side surface where the pole ears are located through double-sided adhesive.

[0014] In the described battery with drop protection, a buffer foam is further included. After the buffer foam is pasted to the bottom of the protection bracket, it is then pasted to the flat step surface at the top of the battery cell.

[0015] Compared with the prior art, the battery with drop protection provided by the present utility model is installed in the battery compartment of a mobile phone and includes a battery cell, an FPC circuit board, and a protection bracket. The FPC circuit board is sleeved inside the protection bracket, and the protection bracket performs snap limit on the FPC circuit board. The protection bracket is adhered to the top of the battery cell and is adjacent to the pole ears of the battery cell. The pole ears of the battery cell are electrically connected to the nickel sheets on the FPC circuit board, and the outer surface of the protection bracket is wrapped with a layer of high-temperature insulating mylar. When the mobile phone drops and the battery generates displacement, the protection bracket will first contact the housing. Since the protection bracket has a certain structural strength and the easily damaged FPC circuit board is assembled inside the protection bracket, it effectively protects the FPC circuit board from being damaged by the impact of the housing. Description of the Drawings

[0016] Figure 1 is an exploded assembly view of the battery with drop protection provided by the present utility model inside the mobile phone.

[0017] Figure 2 is an assembled combination view of the battery with drop protection provided by the present utility model assembled inside the mobile phone.

[0018] Figure 3 is an exploded structural view of the battery with drop protection provided by the present utility model.

[0019] Figure 4 is a structural view of the protection bracket provided by the present utility model.

[0020] Figure 5 is an assembled structural view of the battery with drop protection provided by the present utility model.

[0021] Figure 6 is Figure 5Enlarged schematic diagram of the structure within the solid line frame. Detailed implementation mode

[0022] The present utility model provides a battery with drop protection. To make the objectives, technical solutions and advantages of the present utility model clearer and more definite, the following further elaborates on the present utility model with reference to the accompanying drawings and by way of examples. It should be understood that the specific examples described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] Please refer to Figure 1 、 Figure 2 and Figure 3 simultaneously. A battery 10 with drop protection provided by the present utility model is arranged in a mobile phone and is adhered in the battery compartment of the front shell 30 of the mobile phone through a double-sided adhesive tape 20. The FPC circuit board 102 of the battery 10 is connected to a female socket 40 (also a BTB connector) on a main board (preferably a PCBA (Printed Circuit Board Assembly) main board) 60 through a male socket 50 (a BTB connector). The installation and connection method of the battery 10 is prior art. This embodiment mainly improves the internal structure of the battery 10 so that it can meet the requirements of a higher-level drop test.

[0024] As Figure 3 shown, the battery 10 includes a battery cell 101, an FPC circuit board 102 and a protection bracket 103; the FPC circuit board 102 is sleeved inside the protection bracket 103, and the protection bracket 103 performs snap limit on the FPC circuit board 102. The protection bracket 103 is adhered to the top of the battery cell 101 and is adjacent to the tabs (including a positive tab 104 and a negative tab 105) of the battery cell 101. The tabs of the battery cell 101 are electrically connected to the nickel sheets (including a surface-mounted positive nickel sheet 106 and a negative nickel sheet 107) on the FPC circuit board 102 by spot welding (specifically, the positive tab 104 of the battery cell 101 is spot-welded and electrically connected to the positive nickel sheet 106 on the FPC circuit board 102, and the negative tab 105 of the battery cell 101 is spot-welded and electrically connected to the negative nickel sheet 107 on the FPC circuit board 102). The outer surface of the protection bracket 103 is wrapped with a layer of high-temperature insulating mylar 108. When the mobile phone drops and the battery generates displacement, the protection bracket 103 will contact the housing first. Since the protection bracket 103 has a certain structural strength and the easily damaged FPC circuit board is assembled inside the protection bracket 103, the FPC circuit board is effectively protected from being damaged by the impact of the housing.

[0025] As Figure 4 、 Figure 5 and Figure 6 shown, Figure 4 the interfaces within the dashed line frame and the solid line frame are the same. After enlarging the structure within the solid line frame, we get Figure 6The material of the protective bracket 103 is preferably PC plastic. It is a long strip-shaped groove with an open top surface to facilitate placing the FPC circuit board 102 inside the protective bracket 103. At both ends of the top of one side of the groove of the protective bracket 103, there are respectively provided a triangular prism-shaped buckle 109 for buckling and limiting the FPC circuit board 102 to prevent the FPC circuit board 102 from falling out of the groove.

[0026] At the top of the groove side opposite to the buckle 109, there are respectively provided a notch 110. The position of the notch 110 on the groove side corresponds to the position of the nickel sheet, for exposing the nickel sheet on the FPC circuit board 102 to facilitate soldering with the positive and negative nickel sheets of the FPC circuit board after bending the positive and negative tabs (such as Figure 5 and Figure 6 the bending effect shown).

[0027] On the inner side of the groove side below the notch 110, there are provided two isolation posts 111. The isolation posts 111 are in contact with the nickel sheet of the corresponding pole, so as to form a preset space gap between the FPC circuit board 102 and the groove side below the notch 110 to prevent other components on the FPC circuit board 102 from being squeezed.

[0028] On one side of the protective bracket 103, there is provided an opening 112 to facilitate the male socket of the FPC circuit board 102 to pass through the opening 112, which is convenient for the male socket to be connected to the main board.

[0029] The depth of the groove of the protective bracket 104 is preferably 4.55 mm, and the wall thickness of the periphery of the bracket is preferably 0.35 mm. The length of the protective bracket 103 is set according to the length of the FPC circuit board 102. The length of the groove of the protective bracket 103 is at least 0.3 mm larger than the length of the FPC circuit board 102 and less than the length of the battery cell. The depth of the groove only needs to be able to hold the FPC circuit board 102 and the FPC circuit board 102 will not be exposed, such as the depth of the groove being equal to the width of the FPC circuit board 102 plus 0.05 mm. The inner width of the groove of the protective bracket 103 is equal to the thickness of the FPC circuit board 102 plus 0.25 mm. The outer width of the protective bracket 103 is 0.05 mm larger than the thickness of the FPC circuit board 102 and 8 - 10 mm smaller than the width of the battery cell, so that the protective bracket 103 can be installed on the flat step surface at the top of the battery cell 101, and the preferred width is 4.9 mm.

[0030] The bottom and side of the protective bracket 103 can be respectively pasted and fixed to the flat step surface at the top of the battery cell 101 and the side where the tabs are located through double-sided adhesive tape 114. A buffer foam 113 can also be added between the bottom and the flat step surface. After the buffer foam 113 is pasted on the bottom of the protective bracket 103, it is then pasted to the flat step surface at the top of the battery cell 101. The buffering effect of the buffer foam 113 can weaken the impact force when the mobile phone drops.

[0031] Preferably, after a protective film 114 is wrapped around the outer surface (except the side where the tab is located) of the battery cell 101, it is then pasted in the battery compartment with a double-sided adhesive tape 20. The protective film can make it easier to remove the battery from the mobile phone. The protective film 114 is pasted on the front and back sides of the battery cell. Since the male connector of the FPC circuit board 102 extends from the side of the protective bracket to connect to the main board, the protective film 114 does not affect the signal transmission of the FPC circuit board 102.

[0032] In summary, for the battery with drop protection of the present utility model, by providing a protective bracket and installing the FPC circuit board in the protective bracket, when the mobile phone drops and the battery displaces, the protective bracket contacts the housing to reduce the impact force, and in combination with the buffer foam to reduce the impact force when the mobile phone drops, it can effectively protect the welding between the FPC circuit board and the battery cell, avoid the breakage of the positive and negative tabs or the deformation and breakage of the FPC circuit board, and avoid the damage of the battery due to impact, greatly reducing the probability of battery failure during user use. At the same time, the protective bracket is provided with a buckle to limit the FPC circuit board from falling out, an opening for the male connector to extend and connect to the main board, and a notch to expose part of the positive and negative nickel sheets, facilitating the welding with the bent positive and negative tabs on the battery cell, extending the service life of the mobile phone and reducing after-sales maintenance problems.

[0033] It should be understood that the application of the present utility model is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A battery with drop protection, installed in the battery compartment of a mobile phone, comprising a battery cell and an FPC circuit board, characterized in that, It further includes a protection bracket; the FPC circuit board is sleeved in the protection bracket, and the protection bracket performs snap-limiting on the FPC circuit board. The protection bracket is adhesively fixed to the top of the battery cell and is adjacent to the tab of the battery cell. The tab of the battery cell is electrically connected to the nickel sheet on the FPC circuit board, and a layer of high-temperature insulating Mylar is wrapped on the outer surface of the protection bracket.

2. The battery with drop protection according to claim 1, wherein, The protection bracket is a long strip-shaped groove, and at both ends of the top of one side of the protection bracket, there is respectively a buckle for performing snap-limiting on the FPC circuit board.

3. The battery with drop protection according to claim 2, wherein On the top of the side opposite to the buckle, there are respectively notches for exposing the nickel sheet on the FPC circuit board.

4. The battery with drop protection according to claim 3, characterized in that, On the inner side of the side of the groove below the notch, there are isolation columns, and the isolation columns are in contact with the nickel sheet of the corresponding pole.

5. The drop-protected battery according to claim 2 or 4, characterized in that, On one side of the protection bracket, there is an opening, and the male connector of the FPC circuit board passes through the opening.

6. The battery with drop protection according to claim 5, wherein The bottom and side of the protection bracket are respectively pasted and fixed to the flat step surface at the top of the battery cell and the side where the tab is located through double-sided adhesive tape.

7. The battery with drop protection according to claim 5, characterized in that, It further includes a buffer foam. After the buffer foam is pasted to the bottom of the protection bracket, it is then pasted to the flat step surface at the top of the battery cell.

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