Battery protection circuit and electronic equipment

Abstract

The utility model discloses a battery protection circuit and electronic equipment, and the battery protection circuit is electrically connected to a power-on and power-off signal end of the electronic equipment, so as to enable a battery of the electronic equipment to be electrically isolated from a C-port charger. The battery protection circuit comprises a charging end which is connected with a C-port charger and is used for acquiring a voltage signal; the first switch unit is connected with the charging end; and the input end is connected with the first switch unit, and the first switch unit is used for connecting and disconnecting a circuit between the charging end and the input end. The battery protection circuit is reasonable in design, the battery protection circuit is electrically connected to the power-on and power-off signal end of the electronic equipment, so that the battery of the electronic equipment can be electrically isolated from the C-port charger, and the situation that the battery is exhausted after the battery of the electronic equipment entering a transportation mode is activated by the C-port charger is prevented; the battery of the electronic equipment received by the user is prevented from being damaged to affect subsequent use.

Description

Technical Field

[0001] The present application relates to the field of computer technology, and in particular to a battery protection circuit and electronic equipment. Background Art

[0002] "Ship mode" refers to a state of the laptop battery. When the battery enters the shipping mode, the battery will be in a low power state to extend its life and prevent accidents during transportation. After the laptop battery enters the shipping mode, the battery charging will be stopped. When the laptop is in shipping mode, except for plugging in the power supply, plugging in any other interface will not affect it.

[0003] The way to exit the shipping mode of an electronic device is to insert a power adapter or re-insert the battery. The square-port charger is the default charger. Insert the square-port charger into the electronic device to exit the shipping mode of the electronic device.

[0004] The C-port charging is a new feature highlight of the computer. After testing, some staff members did not know its function and mistakenly thought that there would be no effect if the C-port charger was plugged into the computer. Therefore, they accidentally inserted the C-port charger into the laptop and activated the battery, so that the battery allowed to run out of power.

[0005] At this time, the embedded controller of the laptop computer is not powered, so it cannot control the power output controller through the universal input and output interface, that is, the power output control cannot disable the battery exhaustion function, which causes the battery of the laptop computer to be exhausted during transportation. After the battery is exhausted, it may not be able to be charged or the battery may be damaged and affect its life. When the electronic device reaches the user, the user may not be able to charge it or the battery may not meet the usage needs, which may easily make the user think that the product is defective and increase the customer complaint rate. Utility Model Content

[0006] In view of the above problems, the purpose of the embodiments of the present application is to provide a battery protection circuit and an electronic device for solving the problem that a C-port charger mistakenly activates a battery in transport mode, causing the battery to run out of power and causing misunderstanding to the user.

[0007] The purpose of the embodiment of the present application is to provide a battery protection circuit, which is electrically connected to the upper and lower electrical signal terminals of an electronic device so as to electrically isolate the battery of the electronic device from a C-port charger; the battery protection circuit includes:

[0008] The charging terminal is connected to the C port charger to obtain the voltage signal;

[0009] A first switch unit connected to the charging end;

[0010] An input end, connected to the first switch unit, and the first switch unit is used to switch on and off a line between the charging end and the input end;

[0011] a second switch unit, connected to the first switch unit and used to turn the first switch unit on and off;

[0012] The power supply end is connected to the second switch unit and is used to provide a power supply signal to the second switch unit to turn the second switch unit on and off.

[0013] As an optional embodiment, the power supply terminal is connected to an embedded controller, and the embedded controller of the electronic device is not powered in the transport mode, so that the second switch unit is cut off through the power supply terminal.

[0014] As an optional embodiment, a protection unit is provided between the charging end and the first switch unit, and the protection unit includes a capacitor and a first resistor connected in parallel.

[0015] As an optional embodiment, a second resistor is provided between the second switch unit and the first switch unit, the second resistor is used for voltage division, and the second switch unit is grounded.

[0016] As an optional embodiment, the power supply end is connected to a third resistor, the other end of the third resistor is respectively connected to the second switch unit and a fourth resistor, and the fourth resistor is grounded.

[0017] As an optional embodiment, an alternative unit is provided between the charging end and the input end, the alternative unit is arranged in parallel with the first switch unit, and the alternative unit includes a first connecting member and a second connecting member.

[0018] As an optional embodiment, the first resistor, the second resistor and the fourth resistor are all resistors with a resistance value of 100k.

[0019] As an optional embodiment, both the first switch unit and the second switch unit are MOS tubes.

[0020] The purpose of the embodiment of the present application is to provide an electronic device, including a device body and a battery protection circuit as described above.

[0021] As an optional embodiment, the device body at least includes an embedded controller and a power output controller, the power end is connected to a power pin of the embedded controller, and the input end is connected to an input pin of the power output controller.

[0022] The beneficial effects of the embodiments of the present application are:

[0023] The design of the present application is reasonable, and the battery protection circuit is electrically connected to the upper and lower electrical signal terminals of the electronic device, so as to electrically isolate the battery of the electronic device from the C-port charger, thereby preventing the electronic device that has entered the transportation mode from being activated by the C-port charger and causing the battery to be exhausted, thereby preventing the battery of the electronic device received by the user from being damaged and affecting subsequent use, and also avoiding the user from misunderstanding that the electronic device is a defective product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A circuit diagram of a battery protection circuit according to an embodiment of the present application;

[0025] Figure 2 A structural block diagram of an electronic device according to an embodiment of the present application;

[0026] Figure 3 This is a flow chart of an embodiment of the present application.

[0027] Reference numerals:

[0028] +VBUS_P0, charging end; QU6206, first switch unit; +VBUS_P0_PD, input end; QU6206, second switch unit; +3VL, power end; CU941, capacitor; RU1036, first resistor; RU1034, second resistor; RU1035, third resistor; RU1037, fourth resistor; J8, optional unit; EC, embedded controller; PD, power output controller; Charge IC, charging chip. DETAILED DESCRIPTION

[0029] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0030] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present application will occur to those skilled in the art.

[0031] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0032] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0033] It should also be understood that although the present application has been described with reference to some specific examples, those skilled in the art will be able to readily implement many other equivalent forms of the present application.

[0034] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0035] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present application. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0036] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0037] The present application embodiment provides a battery protection circuit, which is electrically connected to the upper and lower electrical signal terminals of the electronic device, so as to electrically isolate the battery of the electronic device from the C-port charger. Figure 1 As shown, the battery protection circuit includes a charging terminal +VBUS_P0, a first switch unit QU6206, an input terminal +VBUS_P0_PD, a second switch unit QU6206 and a power terminal +3VL.

[0038] The charging terminal +VBUS_P0 is connected to the C-port charger to obtain a voltage signal. After the C-port charger is inserted into the charging terminal +VBUS_P0, the charging terminal +VBUS_P0 obtains a +5V voltage signal. In addition, the charging terminal +VBUS_P0 can also be connected to a square port charger.

[0039] The first switch unit QU6206 is connected to the charging terminal +VBUS_P0, and the input terminal +VBUS_P0_PD is connected to the first switch unit QU6206. The first switch unit QU6206 is used to open and close the line between the charging terminal +VBUS_P0 and the input terminal +VBUS_P0_PD. The second switch unit QU6206 is connected to the first switch unit QU6206 and is used to open and close the first switch unit QU6206.

[0040] The input terminal +VBUS_P0_PD is used to supply power to the power output controller PD, and the first switch unit QU6206 and the second switch unit QU6206 both use MOS tubes. The present application sets two switch units to control the on and off of the lines of the charging terminal +VBUS_P0 and the input terminal +VBUS_P0_PD in order to ensure that the voltage difference at each location can open and close the corresponding switch unit.

[0041] The power terminal +3VL is connected to the second switch unit QU6206, and is used to provide a power signal to the second switch unit QU6206 to open and close the second switch unit QU6206. The power terminal +3VL is 3.3V when it is powered, and the power terminal +3VL is connected to the embedded controller EC. When the electronic device is in the shipping mode, the embedded controller EC is not powered, so that the second switch unit QU6206 is cut off through the power terminal +3VL.

[0042] As an optional embodiment, a protection unit is provided between the charging terminal +VBUS_P0 and the first switch unit QU6206, and the protection unit includes a capacitor CU941 and a first resistor RU1036 connected in parallel. The function of the capacitor CU941 is to prevent voltage mutations and absorb overvoltages in a peak state, and the first parallel resistor RU1036 absorbs the electric energy of the capacitor CU941 to prevent the discharge current of the capacitor CU941 from being too large, thereby avoiding damage to the devices on the link.

[0043] As an optional embodiment, a second resistor RU1034 is provided between the second switch unit QU6206 and the first switch unit QU6206, the second resistor RU1034 is used for voltage division, and the second switch unit QU6206 is grounded. The power supply terminal +3VL is connected to the third resistor RU1035, and the other end of the third resistor RU1035 is respectively connected to the second switch unit QU6206 and the fourth resistor RU1037, and the fourth resistor RU1037 is grounded. Among them, the first resistor RU1036, the second resistor RU1034 and the fourth resistor RU1037 are all 100k resistors, and the third resistor RU1035 is a 10k resistor.

[0044] As an optional embodiment, an alternative unit J8 is provided between the charging terminal +VBUS_P0 and the input terminal +VBUS_P0_PD, and the alternative unit J8 is provided in parallel with the first switch unit QU6206, and the alternative unit J8 includes a first connector and a second connector. When the first switch unit QU6206 fails during use, the first connector and the second connector can be connected so that the voltage of the charging terminal +VBUS_P0 can be smoothly transmitted to the input terminal +VBUS_P0_PD.

[0045] The purpose of the embodiment of the present application is to provide an electronic device, such as Figure 2 and Figure 3 As shown, it includes a device body and a battery protection circuit as described above. The device body at least includes an embedded controller EC and a power output controller PD, the power terminal +3VL is connected to the power pin of the embedded controller EC, and the input terminal +VBUS_P0_PD is connected to the input pin of the power output controller PD. The device body also includes a battery and a charging chip Charge IC.

[0046] When in use, the embedded controller EC is connected to the power terminal +3VL, and when the electronic device enters the shipping mode, the power is turned off, so that the embedded controller EC has no power, and thus the power terminal +3VL has no power. The electronic device automatically enters the shipping mode after shutting down according to the setting of the BIOS setup.

[0047] When there is no power at the power terminal +3VL, the second switch unit QU6206 is in the off state, and the first switch unit QU6206 is not opened. At this time, even if the C-port charger is connected, since the line between the charging terminal +VBUS_P0 and the input terminal +VBUS_P0_PD is closed, there is no power at the input terminal +VBUS_P0_PD. Because the input terminal +VBUS_P0_PD is the power supply for the power output controller PD, there is no power inside the power output controller PD.

[0048] The power output controller PD does not supply power, so it will not communicate with the charging chip Charge IC, and will not raise the voltage of the input terminal +VBUS_P0_PD from 5V to 20V to charge the battery. Therefore, in the shipping mode, the battery will not be activated when the C port charger is inserted, and the battery will not be exhausted.

[0049] If the battery runs out of power, the reversibility of the positive and negative polarity materials of the battery will be destroyed, making the battery unable to be recharged. Even if it is recharged, it can only be partially restored, and the capacity will also decay. The solution of the present application can prevent the battery from running out of power in the transport mode, and the quality and service life of the battery are guaranteed.

[0050] When the electronic device reaches the user, the battery of the electronic device has power, and the user can activate and charge it with a square port charger, but cannot activate and charge it with a C port charger. The user will not mistake the product for a defective product. After the laptop is normally activated, subsequent charging is allowed to be charged with a square port or C port charger.

[0051] When the embedded controller EC has power (that is, the electronic device exits the shipping mode), that is, the power supply terminal +3VL has power, there is a voltage difference between the G pole and the S pole of the second switch unit QU6206, and the second switch unit QU6206 will be opened. At this time, the D pole of the second switch unit QU6206 will be pulled low, and the D pole voltage of the second switch unit QU6206 is 0.

[0052] Because the second resistor RU1034 and the fourth resistor RU1037 act as a voltage divider, the +VBUS_P0_G voltage is half of the charging end +VBUS_P0 at this time, there is a voltage difference between the G pole and the S pole of the first switch unit QU6206, and the first switch unit QU6206 will also be opened, so a 5V voltage will enter the input end +VBUS_P0_PD.

[0053] After the embedded controller EC has power, that is, the power output controller PD has power, the power output controller PD can communicate with the charging chip Charge IC through the signal PD_ACK_SNK1 and the signal TBTA_GATE_VSYS.

[0054] The power output controller PD detects that a C-port charger (or square-port charger) is plugged in through the signal PD_ACK_SNK1 sent by the charging chip Charge IC, and communicates with the C-port charger (or square-port charger) through the CC pin, notifying the C-port charger (or square-port charger) to quickly raise the voltage of the charging end +VBUS_P0 from 5V to 20V, and at the same time gives a feedback signal TBTA_GATE_VSYS to tell the charging chip Charge IC to turn on. After the charging chip Charge IC is turned on, CHARGE_IN will have a voltage of 20V to charge the battery.

[0055] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A battery protection circuit, characterized in that: Electrically connected to the upper and lower electrical signal terminals of the electronic device to electrically isolate the battery of the electronic device from the C-port charger; The battery protection circuit comprises: The charging terminal is connected to the C port charger to obtain the voltage signal; A first switch unit connected to the charging end; An input end, connected to the first switch unit, and the first switch unit is used to switch on and off a line between the charging end and the input end; a second switch unit, connected to the first switch unit and used to turn the first switch unit on and off; The power supply end is connected to the second switch unit and is used to provide a power supply signal to the second switch unit so as to turn the second switch unit on and off.

2. The battery protection circuit according to claim 1, characterized in that: The power supply end is connected to the embedded controller, and the embedded controller of the electronic device is not powered in the transport mode, so that the second switch unit is cut off through the power supply end.

3. The battery protection circuit according to claim 1, characterized in that: A protection unit is provided between the charging end and the first switch unit, and the protection unit includes a capacitor and a first resistor which are arranged in parallel.

4. The battery protection circuit according to claim 3, characterized in that: A second resistor is provided between the second switch unit and the first switch unit, the second resistor is used for voltage division, and the second switch unit is grounded.

5. The battery protection circuit according to claim 4, characterized in that: The power supply end is connected to a third resistor, the other end of the third resistor is respectively connected to the second switch unit and a fourth resistor, and the fourth resistor is grounded.

6. The battery protection circuit according to claim 1, characterized in that: An alternative unit is provided between the charging end and the input end. The alternative unit is provided in parallel with the first switch unit. The alternative unit includes a first connecting member and a second connecting member.

7. The battery protection circuit according to claim 5, characterized in that: The first resistor, the second resistor and the fourth resistor are all resistors with a resistance of 100k.

8. The battery protection circuit according to claim 1, characterized in that: The first switch unit and the second switch unit both use MOS tubes.

9. An electronic device, comprising a device body, characterized in that: It also includes a battery protection circuit as described in any one of claims 1-8.

10. The electronic device according to claim 9, characterized in that: The device body at least includes an embedded controller and a power output controller, the power end is connected to a power pin of the embedded controller, and the input end is connected to an input pin of the power output controller.

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