Battery, mobile terminal and power-off protection method

Abstract

The invention discloses a battery, which comprises a battery protection board, and the battery protection board comprises a controller, a battery protection switch and a system detection pin; the second connecting piece is arranged on the battery protection plate and is in signal connection with the system detection pin; one end of the first connecting piece is detachably connected with the second connecting piece, and the other end of the first connecting piece is connected with electric equipment and is grounded; the controller is in signal connection with the battery protection switch and the system detection pin. The battery protection board has the beneficial effects that the second connecting piece is arranged on the battery protection board, and the controller monitors the voltage value of the second connecting piece in real time and identifies the state of the battery according to the voltage value, so that the battery can be disconnected from an external circuit in time, and the battery cannot be charged and discharged; therefore, the breakdown or short circuit problem caused by the contact of the battery output port with other conductors is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of computer hardware protection, and in particular to a battery, a mobile terminal and a power-off protection method. Background Art

[0002] With the popularization of electronic products, users have an increasing demand for the maintenance of electronic equipment. Carbon reduction requirements such as ecological (ECODesign) design, extending the life of electronic equipment, and reducing electronic waste are constantly being proposed. The concept and products of customer replaceable units (CRU) from various 3C manufacturers are constantly emerging.

[0003] Especially for laptops, many users want to be able to perform simple repairs or replace batteries independently, but safety needs to be guaranteed when removing the battery. In particular, if the user accidentally touches the circuit or device on the motherboard during the disassembly process, it may cause a short circuit or other accidents, thereby damaging the motherboard or other components. Summary of the invention

[0004] In order to solve the problem of damage to a mainboard or components due to a short circuit during computer repair or battery replacement, the present invention aims to provide a battery, a mobile terminal and a power-off protection method.

[0005] In a first aspect, the present invention provides a battery, comprising:

[0006] A battery protection board, the battery protection board comprising a controller, a battery protection switch and a system detection pin;

[0007] A second connecting member, the second connecting member is disposed on the battery protection board and is connected to the system detection pin signal;

[0008] a first connecting member, one end of which is detachably connected to the second connecting member, and the other end of which is connected to an electrical device and grounded;

[0009] The controller is respectively connected to the battery protection switch and the system detection pin signal.

[0010] As an embodiment of the present invention, the battery further includes a first cover and a second cover, and the battery protection plate is located between the first cover and the second cover;

[0011] The first connecting member passes through the first cover body or the second cover body and is detachably connected to the second connecting member.

[0012] As an embodiment of the present invention, one of the first connecting member and the second connecting member is a bolt, and the other of the first connecting member and the second connecting member is a nut matching the bolt.

[0013] As an implementation manner of the present invention, the first connecting member and the second connecting member are both made of conductive materials.

[0014] The second aspect of the present invention provides a mobile terminal, comprising:

[0015] A first housing, a second housing and a battery as described above;

[0016] The battery is fixedly installed between the first shell and the second shell;

[0017] The first connecting member is connected to the first shell or the second shell.

[0018] As an embodiment of the present invention, the first connecting member passes through the first housing and is detachably connected to the second connecting member; or,

[0019] The first connecting member passes through the second shell and is detachably connected to the second connecting member.

[0020] In a third aspect, the present invention provides a power-off protection method, the method comprising:

[0021] Determining a connection state between the first connecting member and the second connecting member by detecting a voltage of the second connecting member;

[0022] When the first connecting member and the second connecting member are in a disconnected state, the battery is disconnected from the external circuit.

[0023] As an implementation manner of the present invention, the step of determining the connection state between the first connector and the second connector by detecting the voltage of the second connector includes:

[0024] Detecting a voltage value V1 of the second connecting member;

[0025] The voltage value V1 is compared with the voltage V2 of the ground terminal of the first shell. When V1 and V2 are not equal, the first connector and the second connector are in a disconnected state. When V1 and V2 are equal, the first connector and the second connector are in a connected state.

[0026] As an embodiment of the present invention, when the first connector and the second connector are in a disconnected state, disconnecting the battery from the external circuit includes:

[0027] The battery protection switch at the battery output end is turned off to stop charging or discharging the battery.

[0028] As an embodiment of the present invention, the method further includes, when the battery is replaced and the first connector and the second connector are disconnected,

[0029] An alarm signal is sent out to remind the user to connect the first connecting member with the second connecting member.

[0030] The beneficial effect of the present invention is that by arranging the second connector on the battery protection board, the controller monitors the voltage value of the second connector in real time and thereby identifies whether the electrical device is in a disassembled state. When the electrical device is in a disassembled state, the battery is disconnected from the external circuit so that the battery cannot be charged or discharged, thereby avoiding breakdown or short circuit problems caused by the battery output port contacting the host device or other conductors. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0032] Figure 1 A cross-sectional view of a mobile terminal according to an exemplary embodiment of the present invention;

[0033] Figure 2 An exploded view of a battery according to an exemplary embodiment of the present invention;

[0034] Figure 3 It is a structural schematic diagram of a battery protection board according to an exemplary embodiment of the present invention;

[0035] Figure 4 is a schematic structural diagram of a second connecting member according to an exemplary embodiment of the present invention;

[0036] Figure 5 is an enlarged view of a first connecting member and a second connecting member according to an exemplary embodiment of the present invention;

[0037] Figure 6 A schematic structural diagram of a mobile terminal according to an exemplary embodiment of the present invention;

[0038] Figure 7 The present invention is a flowchart of a power failure protection method according to an exemplary embodiment of the present invention.

[0039] In the figure,

[0040] 10. First housing; 11. First connecting member; 12. Third connecting member;

[0041] 20. A second housing;

[0042] 30. Battery; 31. Battery protection board; 311. Second connector; 32. Battery cell; 33. Upper cover; 34. Lower cover; 35. Reverse packaging label. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, in the description of the present invention, the terms used are only for illustrative purposes and are not intended to limit the scope of the present invention. The terms "include" and / or "comprise" are used to specify the existence of the elements, steps, operations and / or components, but do not exclude the existence or addition of one or more other elements, steps, operations and / or components. The terms "first", "second" and the like may be used to describe various elements, do not represent the order, and do not limit these elements. In addition, in the description of the present invention, unless otherwise specified, the meaning of "multiple" is two and more than two. These terms are only used to distinguish one element from another element. In conjunction with the following drawings, these and / or other aspects become apparent, and it is easier for a person of ordinary skill in the art to understand the description of the embodiments of the present invention. The accompanying drawings are used to describe the embodiments of the present invention for illustrative purposes only. Those skilled in the art will easily recognize from the following description that, without departing from the principles of the present invention, alternative embodiments of the structures and methods shown in the present invention can be adopted.

[0046] A battery according to an embodiment of the present invention comprises:

[0047] A battery protection board, the battery protection board includes a controller, a battery protection switch and a system detection pin; a second connector, the second connector is arranged on the battery protection board and is connected to the system detection pin signal; a first connector, one end of the first connector is detachably connected to the second connector, and the other end of the first connector is connected to the electrical equipment and grounded; the controller is respectively connected to the battery protection switch and the system detection pin signal.

[0048] See also Figure 2-5 The battery 30 includes a battery protection board 31, a first connector 11 and a second connector 311. The battery protection board 31 includes a battery protection switch and a system detection pin.

[0049] The second connector 311 is, for example, fixed to the upper surface of the battery protection board 31, and the first connector 11 and the second connector 311 are detachably connected by, for example, threaded connection, snap connection, etc. It is easy to understand that when the first connector 11 and the second connector 311 are connected, both are in an electrically connected state at the same time. When the first connector 11 is connected to an external electrical device and is in a grounded state, the voltage signal at the corresponding grounding end will be introduced into the system detection pin through the second connector 311, and the system detection pin will then upload the voltage signal to the controller.

[0050] The controller is arranged on the battery protection board 31, and is used to obtain the voltage signal introduced by the second connector 311, and judge whether the first connector 11 and the second connector 311 are in a connected state according to the obtained voltage signal, and send the signal to the battery protection switch. When the voltage signal is a ground voltage, the first connector 11 and the second connector 311 are in a normal connection state; when the voltage signal is a non-ground voltage, that is, when the system detection pin is in a suspended state, the first connector 11 and the second connector 311 are in a disconnected state. The battery protection switch controls the battery 30 to work normally or stop working according to the obtained signal. When the first connector 11 and the second connector 311 are in a disconnected state, the power protection switch controls the battery 30 to stop working. This avoids the breakdown or short circuit caused by the output end of the battery 30 contacting the host device or other conductors of the electrical equipment.

[0051] For example, when the battery 30 needs to be replaced or the computer needs to be repaired, the first connector 11 needs to be disassembled from the second connector 311 so that the first connector 11 and the second connector 311 are in a disconnected state, so as to remove the battery 30 or repair the internal components of the computer. In this process, the controller monitors the voltage between the first connector 11 and the second connector 311 in real time to obtain the voltage value V1; at the same time, the controller also monitors the voltage between the electrical equipment and the ground terminal in real time to obtain the voltage value V2. The controller determines the connection state between the first connector 11 and the second connector 311 by comparing and analyzing V1 and V2. When V1 and V2 are equal, the first connector 11 and the second connector 311 are in a connected state, and the battery protection switch controls the battery 30 to charge and discharge normally with the external circuit; when V1 and V2 are not equal, the first connector 11 and the second connector 311 are in a separated state, and the battery protection switch obtains a signal and controls the battery 30 to be disconnected from the external circuit. In this way, it is possible to avoid breakdown or short circuit problems caused by the battery 30 contacting the host device or other conductors when the electrical device is repaired or the battery is replaced.

[0052] Specifically, the controller is, for example, a control IC of the battery protection board 31, and the control IC may include a plurality of system detection pins, and the second connector 311 is connected to one of the enable pin signals for real-time monitoring of the voltage signal V1 of the second connector 311. It is understandable that the system detection pin connected to the second connector 311 is also connected to the ground terminal of the electrical device for real-time monitoring of the voltage signal V2 of the ground terminal of the electrical device. The control IC monitors the two voltage signals in real time and compares and analyzes the two voltage signals to determine the connection state between the first connector 11 and the second connector 311. That is, the control IC determines the connection state between the first connector 11 and the second connector 311 by identifying the suspended or grounded state of the enable pin. When the system detection pin is in the grounded state, the first connector 11 and the second connector 311 are in the connected state, and when the enable pin is in the suspended state, the first connector 11 and the second connector 311 are in the separated state.

[0053] The battery protection switch is, for example, a MOS tube. It is understandable that the operation of the battery 30 is controlled by controlling the opening or closing of the MOS tube. For example, when the MOS tube is turned on, the battery 30 works normally; when the MOS tube is turned off, the battery 30 stops working. The MOS tube is, for example, arranged at the output end of the battery 30. When the MOS tube is turned off, the voltage between the positive and negative electrodes of the output end of the battery 30 is zero, and neither charging nor discharging is possible. Therefore, even if the output end of the battery 30 contacts the host device or other conductors, a short circuit problem will not occur.

[0054] Optionally, the battery protection switch can be an independent signal switch on the battery protection board 31. In this case, the controller is connected to the MOS tube signal through the battery protection switch. The MOS tube can also be used as a battery protection switch. In this case, the controller can be directly connected to the MOS tube signal. The application can be selected according to the specific situation, and this application does not specifically limit it.

[0055] Further, such as Figure 2 As shown, the battery 30 includes a battery protection board 31, a battery cell 32, an upper cover 33, a lower cover 34 and an inverted label 35. The battery cell 32 is clamped and fixed between the upper cover 33 and the lower cover 34, the inverted label 35 is attached to the outer surface of the upper cover 33, and the battery protection board 31 is arranged on the battery cell 31. The battery protection board 31 can be fixed to the battery cell 32 by the upper cover 33, for example. The controller and the battery protection switch are both arranged on the battery protection board 31. It is easy to understand that the controller and the battery protection switch are both connected to the battery protection circuit.

[0056] It is easy to understand that the first connector 11 passes through the upper cover 33 or the lower cover 34 and is detachably connected to the second connector 311 on the battery protection board 31. For example, when the second connector 311 is set on the surface of the battery protection board 31 facing the upper cover 33, the first connector 11 passes through the upper cover 33 and is connected to the second connector 311; or, when the second connector 311 is set on the surface of the battery protection board 31 facing the lower cover 34, the first connector 11 passes through the lower cover 34 and is connected to the second connector 311. In use, an adaptive selection can be made according to the setting position of the second connector 311, and this application does not specifically limit it.

[0057] In an optional embodiment, one of the first connecting member and the second connecting member is a bolt, and the other of the first connecting member and the second connecting member is a nut matching the bolt.

[0058] Preferably, Figure 3-5 As shown, the first connecting member 11 is a bolt, and the second connecting member 311 is a nut adapted to the first connecting member 11. The second connecting member 311 is fixed to the surface of the battery protection board 31 close to the first housing 10 by SMT (Surface Mount Technology) technology, soldering or snap-fitting.

[0059] As an embodiment of the present invention, the materials of the first connector and the second connector are both conductive materials. For example, the materials of the first connector 11 and the second connector 311 are metal materials such as copper, aluminum or iron, or other conductive non-metallic materials. As long as the first connector 11 and the second connector 311 can achieve the grounding function, the present application does not make any specific restrictions thereon.

[0060] A mobile terminal according to an embodiment of the present invention comprises a first housing, a second housing and the battery as described above, wherein:

[0061] The battery is fixedly installed between the first shell and the second shell, and the first connector is connected to the first shell or the second shell. The mobile terminal described in the present application is, for example, a laptop computer, a mobile phone, a camera, or other mobile electrical appliances whose batteries can be replaced independently.

[0062] Specifically, a laptop computer is used as an example. Figure 1 and Figure 6 As shown, the first housing 10 is, for example, the bottom cover of a laptop computer, and the second housing 20 is, for example, the top cover of a laptop computer. The battery 30 is fixedly installed in the space enclosed by the bottom cover and the top cover. It is easy to understand that a battery compartment for accommodating the battery 30 is provided on one side of the second housing 20 close to the first housing 10, and the battery 30 is fully or partially embedded in the battery compartment to limit the battery 30 and improve the stability of the battery 30.

[0063] For example, when the battery 30 needs to be replaced or the computer needs to be repaired, the first connector 11 needs to be disassembled from the second connector 311 so that the first connector 11 and the second connector 311 are disconnected, so as to remove the battery 30 or repair the internal components of the computer. In this process, the controller will monitor the voltage between the first connector 11 and the second connector 311 in real time to obtain the voltage value V1; at the same time, the controller will also monitor the voltage between the first shell 10 and / or the second shell 20 and the ground terminal in real time to obtain the voltage value V2. The controller determines the connection state between the first connector 11 and the second connector 311 by comparing and analyzing V1 and V2. When V1 and V2 are equal, the first connector 11 and the second connector 311 are connected, and the battery protection switch controls the battery 30 to charge and discharge normally with the external circuit; when V1 and V2 are not equal, the first connector 11 and the second connector 311 are separated, that is, the computer is repaired or the battery is replaced, and the battery protection switch obtains a signal and controls the battery 30 to be disconnected from the external circuit. In this way, when the computer is repaired or the battery is replaced, the battery 30 can be prevented from contacting the host device or other conductors to cause breakdown or short circuit problems.

[0064] Optionally, the first connector 11 can be provided as an integral structure with the first housing 10, or the first connector 11 can be provided as a separate structure with the first housing 10. When the first connector 11 and the first housing 10 are an integral structure, the first connector 11 is protruded and provided on a side of the first housing 10 close to the second connector 311, so as to facilitate the connection between the first connector 11 and the second connector 311. When the first connector 11 and the first housing 10 are a separate structure, a through hole is provided at a position corresponding to the second connector 311 on the first housing 10, and the first connector 11 passes through the through hole to connect with the second connector 311.

[0065] like Figure 6 As shown, it is easy to understand that the first shell 10 also includes a plurality of third connecting members 12, and the first shell 10 and the second shell 20 are provided with threaded holes adapted to the plurality of third connecting members 12, and the plurality of third connecting members 12 and the plurality of threaded holes further fix the first shell 10 and the second shell 20. The number of the third connecting members and the threaded holes is, for example, 4, 5, 6, 7 or 8, etc., and the number is not specifically limited in this application. Preferably, the second connecting member 12 and the first connecting member 11 are the same bolts, which can save costs and simplify the installation or disassembly process between the first shell 10 and the second shell 20.

[0066] In an optional embodiment, the first connecting member passes through the first shell and is detachably connected to the second connecting member; or, the first connecting member passes through the second shell and is detachably connected to the second connecting member.

[0067] The following description will be made by taking the example that the first connecting member 11 passes through the first housing 10 and is detachably connected to the second connecting member 311. Figure 1 As shown in FIG. 6 , the first connecting member 11 is disposed on the first housing 10, and a battery compartment for accommodating the battery 30 is disposed on the second housing 20, and the battery 30 is placed in the battery compartment. A through hole for the first connecting member 11 to pass through is disposed at a corresponding position of the first housing 10, and the first connecting member 11 passes through the through hole and is detachably connected to the second connecting member 311.

[0068] Alternatively, the first connector 11 is disposed on the second housing 20, and a battery compartment for accommodating the battery 30 is disposed on the first housing 10, and the battery 30 is placed in the battery compartment. A through hole for the first connector 11 to pass through is disposed at a corresponding position of the second housing 20, and the first connector 11 passes through the through hole to be detachably connected to the second connector 311.

[0069] In use, it can be selected and applied according to actual conditions, and this application does not make any specific restrictions on it. As long as the connection state of the first connecting member 11 and the second connecting member 311 can be identified, it can be determined whether the first shell 10 and the second shell 20 are in a connected state.

[0070] like Figure 7 As shown, a power-off protection method according to an embodiment of the present invention includes:

[0071] By detecting the voltage of the second connecting member 311, the connection state between the first connecting member 11 and the second connecting member 311 is determined;

[0072] When the first connector 11 and the second connector 311 are in a disconnected state, the battery 30 is disconnected from the external circuit.

[0073] Specifically, as described above, the controller is, for example, a control IC on the battery protection board 31. The control IC monitors the voltage of the second connector 311 in real time, and determines the connection state between the first connector 11 and the second connector 311 through the obtained voltage signal. When the control IC determines that the first connector 11 and the second connector 311 are in a connected state, it sends a signal to the battery protection switch, and the battery protection switch controls the battery 30 to work normally after receiving the signal; when the control IC determines that the first connector 11 and the second connector 311 are in a disconnected state, that is, the computer is in a maintenance state or a battery replacement state, the control IC sends a signal to the battery protection switch, and the battery protection switch controls the battery 30 to stop working after receiving the signal. Therefore, when the computer is in a maintenance state or a battery replacement state, since the battery 30 is in a power-off state, even if the battery 30 contacts the device or other conductors on the computer host, the device will not be damaged due to a short circuit.

[0074] In an optional implementation, determining the connection state between the first connection member and the second connection member by detecting the voltage of the second connection member includes:

[0075] The controller detects the voltage value V1 of the second connector; the controller compares the voltage value V1 with the voltage V2 of the ground terminal of the first shell or the second shell. When V1 and V2 are not equal, the first connector and the second connector are in a disconnected state; when V1 and V2 are equal, the first connector and the second connector are in a connected state.

[0076] It can be understood that the controller is, for example, a control IC, and the second connector 311 is connected to an enable pin on the control IC through a voltage detection device such as a voltage transformer, so as to monitor the voltage signal V1 of the second connector 311 in real time. At the same time, the control IC monitors the voltage signal V2 between the first housing 10 or the second housing 20 and the ground terminal in real time. Afterwards, the two voltage signals are compared and analyzed to determine the connection state between the first connector 11 and the second connector 311, and then determine whether the computer is in a state of repair or battery replacement. For example, the control IC determines the connection state between the first connector 11 and the second connector 311 by identifying the suspended or grounded state of the enable pin. When the enable pin is in a grounded state, the first connector 11 and the second connector 311 are in a connected state, and the battery 30 can be controlled to work normally; when the enable pin is in a suspended state, the first connector 11 and the second connector 311 are in a separated state, and the computer is in a state of repair or battery replacement, and the battery 30 should be controlled to stop working, thereby avoiding the battery from contacting the host device or other conductors and causing a short circuit risk.

[0077] In an optional embodiment, when the first connector 11 and the second connector 311 are in a disconnected state, the battery 30 is disconnected from the external circuit, including: the battery protection switch turns off the MOS tube at the battery output end, so that the battery 30 stops charging or discharging.

[0078] Specifically, the operation of the battery 30 is controlled by controlling the MOS tube to be turned on or off. For example, when the MOS tube is turned on, the battery 30 works normally; when the MOS tube is turned off, the battery 30 stops working. The MOS tube is, for example, arranged at the output end of the battery 30. When the MOS tube is turned off, the voltage between the positive and negative electrodes of the output end of the battery 30 is zero, and neither charging nor discharging is possible. Therefore, even if the output end of the battery 30 contacts the host device or other conductors, a short circuit problem will not occur.

[0079] In an optional embodiment, the power-off protection method further includes: when the battery 30 is replaced and the first connector 11 and the second connector 311 are in a disconnected state, the controller sends an alarm signal to remind the user to connect the first connector 11 and the second connector 311 .

[0080] It is easy to understand that when the computer is repaired or the battery 30 is replaced, the first shell 10 and the second shell 20 need to be connected and fixed through multiple second connectors 12, and the computer can work normally at this time. If the user forgets to connect the first connector 11 with the second connector 311, according to the principle that the control IC of the battery protection board 31 monitors the voltage signal as described above, the control IC will detect that the enable pin connected to the second connector 311 is in a suspended state, and the control IC sends an alarm signal to the computer host. The computer host, for example, displays the alarm signal on the computer display screen to remind the user to connect the first connector 11 with the second connector 311, so that when the computer is repaired or the battery is replaced again, the first connector 11 and the second connector 311 can still play a power-off protection role.

[0081] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0082] Furthermore, persons of ordinary skill in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is meant to be within the scope of the present invention and to form different embodiments.

[0083] It will be appreciated by those skilled in the art that, although the present invention has been described with reference to exemplary embodiments, various changes may be made and its elements may be replaced with equivalents without departing from the scope of the present invention. In addition, many modifications may be made to adapt specific situations or materials to the teachings of the present invention without departing from the essential scope of the present invention.

Claims

1. A battery, characterized in that: include: A battery protection board, the battery protection board comprising a controller, a battery protection switch and a system detection pin; A second connecting member, the second connecting member is disposed on the battery protection board and is connected to the system detection pin signal; a first connecting member, one end of which is detachably connected to the second connecting member, and the other end of which is connected to an electrical device and grounded; The controller is respectively connected to the battery protection switch and the system detection pin signal.

2. The battery according to claim 1, characterized in that It also includes a first cover body and a second cover body, wherein the battery protection plate is located between the first cover body and the second cover body; The first connecting member passes through the first cover body or the second cover body and is detachably connected to the second connecting member.

3. The battery according to claim 1, characterized in that One of the first connecting member and the second connecting member is a bolt, and the other of the first connecting member and the second connecting member is a nut matched with the bolt.

4. The battery according to claim 1, characterized in that The first connecting member and the second connecting member are both made of conductive materials.

5. A mobile terminal, characterized in that: include: A first shell, a second shell and a battery as claimed in any one of claims 1 to 4; The battery is fixedly installed between the first shell and the second shell; The first connecting member is connected to the first shell or the second shell.

6. The mobile terminal according to claim 5, characterized in that: The first connecting member passes through the first housing and is detachably connected to the second connecting member; or, The first connecting member passes through the second shell and is detachably connected to the second connecting member.

7. A power-off protection method for a mobile terminal based on any one of claims 1 to 6, characterized in that: include: Determining a connection state between the first connecting member and the second connecting member by detecting a voltage of the second connecting member; When the first connecting member and the second connecting member are in a disconnected state, the battery is disconnected from the external circuit.

8. The power-off protection method according to claim 7, characterized in that: The step of determining the connection state between the first connector and the second connector by detecting the voltage of the second connector includes: Detecting a voltage value V1 of the second connecting member; The voltage value V1 is compared with the voltage V2 of the ground terminal of the first shell. When V1 and V2 are not equal, the first connector and the second connector are in a disconnected state. When V1 and V2 are equal, the first connector and the second connector are in a connected state.

9. The power-off protection method according to claim 7, characterized in that: When the first connector and the second connector are in a disconnected state, disconnecting the battery from an external circuit comprises: The battery protection switch at the battery output end is turned off to stop charging or discharging the battery.

10. The power-off protection method according to claim 7, characterized in that: Also includes: When the battery is replaced and the first connector is disconnected from the second connector, An alarm signal is sent out to remind the user to connect the first connecting member with the second connecting member.

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