Charging detection circuit, circuit board and electronic equipment

Abstract

The utility model relates to a charging detection circuit, a circuit board and electronic equipment. The charging detection circuit comprises a charging management module used for managing charging and discharging of a battery; the first connector is connected with the charging management module; the second connector is connected with the first connector, and the second connector is connected with the charging management module; the first signal transmission circuit is connected with the first connector, and the first signal transmission circuit is communicated with the charging management module to obtain an electric signal of the positive electrode of the battery; and the second signal transmission circuit is connected with the first connector, the second signal transmission circuit is connected with the charging management module to obtain an electric signal of the negative electrode of the battery, and the first signal transmission circuit and the second signal transmission circuit are differential detection lines. According to the arrangement of the invention, the charging condition of the battery can be obtained, and the cost can be reduced.

Description

Technical Field

[0001] The present disclosure relates to battery charging design, and more particularly to a charging detection circuit, a circuit board and an electronic device. Background Art

[0002] With the development of communication technology, electronic devices are used in more and more scenarios, and users have higher requirements for the battery charging of electronic devices, and technologies such as high-power charging and fast charging have emerged. In this context, battery power detection solutions in charging technology have gradually received attention. Utility Model Content

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a charging detection circuit, a circuit board and an electronic device.

[0004] According to a first aspect of an embodiment of the present disclosure, a charging detection circuit is provided, comprising: a charging management module for managing the charging and discharging of a battery; a first connector connected to the charging management module; a second connector connected to the first connector, and the second connector is connected to the charging management module; a first signal transmission circuit, the first signal transmission circuit is connected to the first connector, and the first signal transmission circuit is connected to the charging management module to obtain the electrical signal of the positive electrode of the battery; and a second signal transmission circuit, the second signal transmission circuit is connected to the first connector, and the second signal transmission circuit is connected to the charging management module to obtain the electrical signal of the negative electrode of the battery, wherein the first signal transmission circuit and the second signal transmission circuit are differential detection lines.

[0005] In some embodiments, the charging management module includes a first port and a second port, wherein the first signal transmission circuit is connected to the first port to obtain the voltage signal of the positive electrode of the battery, and the second signal transmission circuit is connected to the second port to obtain the voltage signal of the negative electrode of the battery.

[0006] In some embodiments, the first signal transmission circuit is connected to the positive pole of the first connector, and the second signal transmission circuit is connected to the negative pole of the first connector.

[0007] In some embodiments, the charging detection circuit further includes: a sampling resistor connected between the charging management module and the first connector and the second connector.

[0008] In some embodiments, the charging detection circuit includes: a third signal transmission circuit, the third signal transmission circuit is connected to the sampling resistor, and the third signal transmission circuit is connected to the charging management module to transmit the current signal of the positive electrode of the battery; and a fourth signal transmission circuit, the fourth signal transmission circuit is connected to the sampling resistor, and the fourth signal transmission circuit is connected to the charging management module to transmit the current signal of the negative electrode of the battery.

[0009] In some embodiments, the charging detection circuit further includes: a reference signal transmission circuit connected to the second connector, and the reference signal transmission circuit is connected to the charging management module to transmit a charging reference voltage of the battery.

[0010] In some embodiments, the sampling resistor is connected to the cathode of the first connector and to the cathode of the second connector.

[0011] In some embodiments, the cathode of the first connector and the cathode of the second connector are connected to a first node, and one end of the sampling resistor is connected to the first node.

[0012] In some embodiments, the charging detection circuit includes: an energy storage element, which prevents static electricity by storing energy, and the energy storage element is connected between the first connector and the first signal transmission circuit, and / or the energy storage element is connected between the first connector and the second signal transmission circuit.

[0013] In some embodiments, the first signal transmission circuit is directly connected to a charge pump; and / or the second signal transmission circuit is directly connected to a charge pump.

[0014] In some embodiments, the energy storage element is a resistor, a capacitor or an inductor.

[0015] In some embodiments, the negative pole of the second connector is set to be grounded.

[0016] In some embodiments, the charging detection circuit includes an encryption circuit for transmitting an encrypted signal of the charging protocol of the battery, and the encryption circuit is connected to the positive pole of the first connector.

[0017] In some embodiments, the charging detection circuit includes a temperature detection circuit, which is connected between the negative pole of the first connector and the positive pole of the temperature sensor of the battery, and the ground of the temperature sensor of the battery is connected to the positive pole of the second connector.

[0018] In some embodiments, the charging detection circuit includes an in-place detection circuit, the in-place detection circuit is used to transmit an access signal of the second connector, and the in-place detection circuit is connected to the positive pole of the second connector.

[0019] In some embodiments, the first signal transmission circuit and the second signal transmission circuit are connected in parallel.

[0020] According to a second aspect of an embodiment of the present disclosure, there is provided a circuit board, comprising: a main board; and a charging detection circuit as described in any one of the aforementioned embodiments, wherein the charging detection circuit is arranged on the main board.

[0021] In some embodiments, the mainboard includes a digital-to-analog conversion module, and the negative pole of the second connector is connected to the ground of the digital-to-analog conversion module.

[0022] According to a third aspect of an embodiment of the present disclosure, there is provided an electronic device, comprising: a battery; a mainboard; and a charging detection circuit as described in any one of the aforementioned embodiments, wherein the charging detection circuit is arranged on the mainboard.

[0023] In some embodiments, the electronic device includes a charge pump, and the first signal transmission circuit is directly connected to the charge pump; and / or the second signal transmission circuit is directly connected to the charge pump.

[0024] In some embodiments, the battery is provided with a temperature sensor, the charging detection circuit includes a temperature detection circuit, the temperature detection circuit is connected between the negative pole of the first connector and the positive pole of the temperature sensor, and the ground of the temperature sensor is connected to the positive pole of the second connector.

[0025] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: According to the setting of the present disclosure, the two differential detection lines of the first signal transmission circuit and the second signal transmission circuit are respectively connected to the charging management module to obtain the electrical signals of the positive and negative electrodes of the battery, so as to calculate the charging condition of the battery. Such a setting can not only obtain the charging condition of the battery, but also reduce costs. Furthermore, since the present disclosure obtains the electrical signals of the positive and negative electrodes of the battery, the obtained charging condition of the battery is more accurate. In addition, the present disclosure is also provided with a first connector and a second connector connected to each other, so that fast charging can be achieved.

[0026] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0028] Figure 1 is a circuit diagram of a charging detection circuit according to an exemplary embodiment.

[0029] Figure 2 is a circuit diagram of a charging detection circuit according to an exemplary embodiment.

[0030] Figure 3 is a block diagram of a charging detection circuit according to an exemplary embodiment.

[0031] Figure 4 is a block diagram of a charging detection circuit according to an exemplary embodiment.

[0032] Figure 5 It is a block diagram of a device according to an exemplary embodiment. DETAILED DESCRIPTION

[0033] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0034] The electronic devices involved in the present disclosure may also be user equipment (UE), mobile station (MS), mobile terminal (MT), etc., which are devices that provide voice and / or data connectivity to users. For example, the terminal may be a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: smart phones (Mobile Phone), pocket computers (Pocket Personal Computer, PPC), PDAs, personal digital assistants (Personal Digital Assistant, PDA), laptops, tablet computers, wearable devices, or vehicle-mounted devices, etc. In addition, when it is a vehicle-to-everything (V2X) communication system, the terminal device may also be a vehicle-mounted device. It should be understood that the embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal.

[0035] With the development of communication technology, electronic devices are used in more and more scenarios, and users have higher requirements for the battery charging of electronic devices, and technologies such as high-power charging and fast charging have emerged. In this context, battery power detection solutions in charging technology have gradually received attention.

[0036] In order to overcome the problems existing in the related art, the present disclosure provides a charging detection circuit, a circuit board and an electronic device.

[0037] The present disclosure provides a charging detection circuit, including: a charging management module, used to manage the charging and discharging of a battery; a first connector, connected to the charging management module; a second connector, connected to the first connector, and the second connector is connected to the charging management module; a first signal transmission circuit, the first signal transmission circuit is connected to the first connector, and the first signal transmission circuit is connected to the charging management module to obtain the electrical signal of the positive electrode of the battery; and a second signal transmission circuit, the second signal transmission circuit is connected to the first connector, and the second signal transmission circuit is connected to the charging management module to obtain the electrical signal of the negative electrode of the battery, wherein the first signal transmission circuit and the second signal transmission circuit are differential detection lines.

[0038] According to the configuration of the present disclosure, the two differential detection lines of the first signal transmission circuit and the second signal transmission circuit are respectively connected to the charging management module to obtain the electrical signals of the positive and negative electrodes of the battery, so as to calculate the charging condition of the battery. Such a configuration can not only obtain the charging condition of the battery, but also reduce costs. Furthermore, since the present disclosure obtains the electrical signals of the positive and negative electrodes of the battery, the obtained charging condition of the battery is more accurate. In addition, the present disclosure is also provided with a first connector and a second connector connected to each other, so that fast charging can be achieved.

[0039] Figure 1 is a circuit diagram of a charging detection circuit according to an exemplary embodiment. Figure 2 FIG. 1 is a circuit diagram of a charging detection circuit according to an exemplary embodiment. Figure 1 and Figure 2 As shown, the charging detection circuit of the present disclosure may include a charging management module, a first connector 10, a second connector 20, a first signal transmission circuit BATADC_P and a second signal transmission circuit BATADC_N.

[0040] In an exemplary embodiment of the present disclosure, the electronic device may include a circuit board, the circuit board may include a mainboard, and the charging detection circuit of the present disclosure may be arranged on the mainboard. The mainboard of the present disclosure is a mainboard of an electronic device in a general sense, and is used to manage the normal use of the electronic device.

[0041] like Figure 1 and Figure 2 As shown, the charging management module 60 can be used to manage the charging and discharging of the battery, and can also be called a charging chip. In some embodiments, it can be a charging ADC (analog-to-digital converter) chip.

[0042] In an exemplary embodiment of the present disclosure, the charging detection circuit may include a negative battery power supply VBATT_CONN_S and a positive battery power supply VBATT_CONN_M. In an exemplary embodiment of the present disclosure, the first connector 10 and the second connector 20 may be connected between the negative battery power supply VBATT_CONN_S and the positive battery power supply VBATT_CONN_M.

[0043] In an exemplary embodiment of the present disclosure, the charging management module may include a first port VBATT_SNS_P and a second port VBATT_SNS_M, wherein a first signal transmission circuit BATADC_P is connected to the first port VBATT_SNS_P to obtain a voltage signal of a positive electrode of the battery, and a second signal transmission circuit BATADC_N is connected to the second port VBATT_SNS_M to obtain a voltage signal of a negative electrode of the battery.

[0044] In an exemplary embodiment of the present disclosure, the first signal transmission circuit BATADC_P and the second signal transmission circuit BATADC_N may be differential detection lines.

[0045] In an exemplary embodiment of the present disclosure, the first signal transmission circuit BATADC_P and the second signal transmission circuit BATADC_N may be connected to the charging management module 60. Figure 2 As shown, the first signal transmission circuit BATADC_P may be connected to the port VBATT_SNS_P of the charging management module 60. The second signal transmission circuit BATADC_N may be connected to the port VBATT_SNS_M of the charging management module 60.

[0046] In an exemplary embodiment of the present disclosure, the battery charging status can be obtained according to the voltage signals of the positive and negative electrodes of the battery acquired by the first signal transmission circuit BATADC_P and the second signal transmission circuit BATADC_N. For example, a control module can be provided on the mainboard, and the control module can be based on the voltage signals of the positive and negative electrodes of the battery.

[0047] It should be noted that in the exemplary embodiments of the present disclosure, the battery can be a battery pack or a battery package. In the exemplary embodiments of the present disclosure, if the battery is a battery pack or a battery package including battery cells, the positive and negative electrodes of the aforementioned battery are the positive and negative electrodes of the battery cells. It can be seen that in the exemplary embodiments of the present disclosure, the charging voltage of the positive and negative electrodes of the battery cells can be obtained through the charging management module, and the charging condition of the battery obtained according to the charging voltage of the positive and negative electrodes of the electric chip is more accurate.

[0048] In an exemplary embodiment of the present disclosure, the first connector 10 may have a positive electrode 11 and a negative electrode 12. In an exemplary embodiment of the present disclosure, the first signal transmission circuit BATADC_P may be connected to the positive electrode 11 of the first connector 10. In an exemplary embodiment of the present disclosure, the second signal transmission circuit BATADC_N may be connected to the negative electrode 12 of the first connector 10. Figure 1 As shown, the first connector 10 can be a main connector, used for main power supply to maintain normal operation of the electronic device.

[0049] In an exemplary embodiment of the present disclosure, the second connector 20 may have a positive electrode 21 and a negative electrode 22. Figure 1 As shown, the second connector 20 may be a slave connector.

[0050] In an exemplary embodiment of the present disclosure, the cathode 22 of the second connector 20 may be grounded. For example, the mainboard may be provided with an analog-to-digital converter (ADC), and the cathode 22 of the second connector 20 may be connected to the ground of the ADC.

[0051] In the exemplary embodiment of the present disclosure, Figure 1 As shown, the circuit 200 can be connected to the port 4 of the negative pole 22 of the second connector 20 , and the negative pole 22 of the second connector 20 can be grounded through the circuit 200 .

[0052] In an exemplary embodiment of the present disclosure, the charging detection circuit may include an encryption circuit BAT_SIO for transmitting an encrypted signal of a charging protocol of a battery, and the encryption circuit BAT_SIO may be connected to the positive pole 11 of the first connector 10. For example, for different charging methods, there is a specific charging protocol between the electronic device and the power adapter. For example, the charging protocols for charging schemes of different powers are different. The encryption circuit BAT_SIO of this scheme is intended to transmit an encrypted signal that enables the electronic device and the power adapter to complete charging. For example, in an exemplary embodiment of the present disclosure, the electronic device can adapt to a 67W charging scheme, then the encryption circuit BAT_SIO transmits an encrypted signal that matches the 67W charging scheme.

[0053] In an exemplary embodiment of the present disclosure, the charging detection circuit may include a temperature detection circuit BATON_TH, which may be connected between the cathode 12 of the first connector 10 and the anode of the temperature sensor. The ground NTC_GND of the temperature sensor may be connected to the anode 21 of the second connector 20.

[0054] In an exemplary embodiment of the present disclosure, a temperature sensor may be provided on the battery, or may be provided near the battery, for sensing the temperature of the battery. According to the sensed temperature of the battery, some protective measures may be taken, for example, stopping charging or discharging, issuing an early warning, etc.

[0055] In an exemplary embodiment of the present disclosure, the temperature sensor may be a thermistor, which is disposed near the battery or disposed on the battery, and the thermistor is connected to a charging detection circuit, and the temperature condition at the location may be obtained according to the change in the resistance value of the thermistor. In an exemplary embodiment of the present disclosure, the thermistor may be a positive temperature coefficient thermistor (PTC thermistor, i.e., Positive Temperature Coefficient thermistor) or a negative temperature coefficient thermistor (NTC thermistor, i.e., Negative Temperature Coefficient thermistor). The resistance value of a positive temperature coefficient thermistor increases with increasing temperature, and the resistance value of a negative temperature coefficient thermistor decreases with increasing temperature, and they are both semiconductor devices.

[0056] In an exemplary embodiment of the present disclosure, the charging detection circuit may include a presence detection circuit BAT_DET, which may be used to transmit a connection signal of the second connector 20, and the presence detection circuit BAT_DET is connected to the positive electrode 21 of the second connector 20. In an exemplary embodiment of the present disclosure, the presence detection circuit BAT_DET may determine whether the second connector 20 is connected through an electrical signal of a pin connected to the positive electrode 21 of the second connector 20.

[0057] In the exemplary embodiment of the present disclosure, a dual connector solution such as a first connector 10 and a second connector 20 is adopted, so that the present disclosure can adapt to a high-power fast charging solution, for example, the present disclosure can be applicable to a 67W charging solution. The in-place detection circuit BAT_DET can promptly know whether the second connector 20 is connected to prevent the second connector 20 from falling and causing a charging failure.

[0058] In an exemplary embodiment of the present disclosure, the charging detection circuit further includes a reference signal transmission circuit PACK_SNS_M connected to the negative electrode 22 of the second connector 20 , and the reference signal transmission circuit PACK_SNS_M can be connected to the charging management module 60 to transmit a charging reference voltage of the battery.

[0059] like Figure 2 As shown, the reference signal transmission circuit PACK_SNS_M is connected to a port of the charging management module 60 .

[0060] In an exemplary embodiment of the present disclosure, the control module on the main board can calculate the battery condition based on the charging signal (e.g., charging voltage) of the battery cell obtained by the charging detection circuit from the charging management module 60 and combined with the charging reference voltage.

[0061] In an exemplary embodiment of the present disclosure, the charging detection circuit includes an energy storage element, which can be anti-static by storing energy, and the energy storage element is connected between the first connector 10 and the first signal transmission circuit BATADC_P. Alternatively, in another embodiment, the energy storage element can be connected between the first connector 10 and the second signal transmission circuit BATADC_N.

[0062] In the exemplary embodiment of the present disclosure, the energy storage element is a resistor, a capacitor or an inductor. For example, the energy storage element can be a resistor, such as Figure 1 The resistor R6501 and the resistor R6503 are shown in FIG. In the exemplary embodiment of the present disclosure, the energy storage element can achieve the function of preventing static electricity in the charging detection circuit by storing energy.

[0063] In the exemplary embodiment of the present disclosure, Figure 1 As shown, the energy storage element may include a first energy storage element 50 and a second energy storage element 40. The first energy storage element 50 may be a resistor R6503, and the second energy storage element 40 may be a resistor R6501.

[0064] The first energy storage element 50 may be connected between the cathode 12 of the first connector 10 and the first signal transmission circuit BATADC_P, and the second energy storage element 40 may be connected between the anode 11 of the first connector 10 and the second signal transmission circuit BATADC_N.

[0065] In an exemplary embodiment of the present disclosure, the first energy storage element 50 may be a resistor with a resistance value of about 100 Ω (ohm).

[0066] In an exemplary embodiment of the present disclosure, the second energy storage element 40 may be a resistor with a resistance value of about 100 Ω (ohm).

[0067] In the exemplary embodiment of the present disclosure, Figure 3 As shown, the electronic device may be provided with a charge pump 70, and the first signal transmission circuit BATADC_P may be directly connected to the charge pump 70. For example, the first signal transmission circuit BATADC_P may be directly connected to the port BATP of the charge pump 70.

[0068] In the exemplary embodiment of the present disclosure, Figure 3 As shown, the second signal transmission circuit BATADC_N is directly connected to the charge pump 70 . For example, the second signal transmission circuit BATADC_N is directly connected to the port SRP_BATN of the charge pump 70 .

[0069] In the exemplary embodiment of the present disclosure, Figure 1 As shown, the first signal transmission circuit BATADC_P and the second signal transmission circuit BATADC_N can be arranged to be connected in parallel.

[0070] like Figure 1 As shown, the first signal transmission circuit BATADC_P can be directly connected to the charge pump 70, and the second signal transmission circuit BATADC_N can be directly connected to the charge pump 70. It should be noted that the direct connection here means that there is no need to connect an energy storage element for anti-static between the first signal transmission circuit BATADC_P and the charge pump 70. According to the configuration of the present disclosure, two differential detection lines of the first signal transmission circuit BATADC_P and the second signal transmission circuit BATADC_N are respectively connected to the charging management module 60 to obtain the electrical signals of the positive and negative electrodes of the battery, so as to calculate the charging status of the battery. Therefore, by connecting an energy storage element between the first connector 10 and the first signal transmission circuit BATADC_P, and / or connecting an energy storage element between the first connector 10 and the second signal transmission circuit BATADC_N, the anti-static effect of the entire charging detection circuit can be achieved, so there is no need to add a 100Ω resistor in the front stage of the first signal transmission circuit BATADC_P and / or the second signal transmission circuit BATADC_N.

[0071] In the related art, it is usually necessary to add a 100Ω resistor in each branch before the first signal transmission circuit and the second signal transmission circuit. However, the setting of this solution only requires the first signal transmission circuit and the second signal transmission circuit to be routed in parallel, which can reduce the setting of at least two energy storage elements. Therefore, this solution reduces costs.

[0072] In an exemplary embodiment of the present disclosure, the charging detection circuit may further include a sampling resistor 30 . The sampling resistor 30 may be connected between the charging management module 60 and the first connector 10 and the second connector 20 .

[0073] In the present disclosure, the resistance of the sampling resistor 30 may be about 0.001Ω (ohm).

[0074] In an exemplary embodiment of the present disclosure, the sampling resistor 30 may be connected to the negative electrode 12 of the first connector 10 .

[0075] In an exemplary embodiment of the present disclosure, the sampling resistor 30 may be connected to the negative electrode 22 of the second connector 20 .

[0076] Figure 4is a block diagram of a charging detection circuit according to an exemplary embodiment. In the exemplary embodiment of the present disclosure, the negative electrode 12 of the first connector 10 can be connected to the first node 100, the negative electrode 22 of the second connector 20 can be connected to the first node 100, and one end of the sampling resistor 30 is connected to the first node 100. Such a setting enables the sampling resistor 30 to implement negative-side sampling, ensures that the negative-side impedance is reduced, and thus improves the charging efficiency.

[0077] In an exemplary embodiment of the present disclosure, the negative pole 12 of the first connector 10 can be connected to the first node 100, and the negative pole 22 of the second connector 20 can be connected to the first node 100. Such an arrangement allows the first connector 10 and the second connector 20 to be arranged close together, reducing wiring, reducing impedance, and improving charging efficiency.

[0078] In the exemplary embodiment of the present disclosure, Figure 1 and Figure 2 As shown, the charging detection circuit may further include a third signal transmission circuit CS_P and a fourth signal transmission circuit CS_N, and the third signal transmission circuit CS_P and the fourth signal transmission circuit CS_N may be connected to the charging management module 60 .

[0079] like Figure 2 As shown, the third signal transmission circuit CS_P can be connected to the port OPT_3 of the charging management module 60, and the fourth signal transmission circuit CS_N can be connected to the port OPT_4 of the charging management module 60. The port OPT_1 of the charging management module 60 is used to connect other components or circuits.

[0080] In an exemplary embodiment of the present disclosure, the third signal transmission circuit CS_P may be connected to the sampling resistor 30 , and the third signal transmission circuit CS_P is connected to the charging management module 60 to transmit a current signal of the positive electrode of the battery.

[0081] In an exemplary embodiment of the present disclosure, the fourth signal transmission circuit CS_N may be connected to the sampling resistor 30 , and the fourth signal transmission circuit CS_N may be connected to the charging management module 60 to transmit the current signal of the negative electrode of the battery.

[0082] In the present disclosure, the third signal transmission circuit CS_P and the fourth signal transmission circuit CS_N may be connected to both ends of the sampling resistor 30 , respectively.

[0083] like Figure 1 As shown, the charging detection circuit may further include some circuits provided with capacitors C6507, C6506, C6505, C6504, C6503, C6530, C6528, C6529, and C6500, which may be used for filtering.

[0084] Based on the same concept, the embodiment of the present disclosure further provides a circuit board, including: a main board; and a charging detection circuit as in any one of the above embodiments, the charging detection circuit is arranged on the main board. The contents repeated with the above embodiments will not be repeated here.

[0085] In an exemplary embodiment of the present disclosure, the mainboard includes a digital-to-analog conversion module, and the negative electrode of the second connector is connected to the ground of the digital-to-analog conversion module.

[0086] Based on the same concept, the disclosed embodiment also provides an electronic device, including: a battery; a mainboard; and a charging detection circuit as in any of the above embodiments, the charging detection circuit being arranged on the mainboard. The contents repeated in the above embodiments will not be repeated here.

[0087] In an exemplary embodiment of the present disclosure, the electronic device may include a charge pump 70 , and the first signal transmission circuit BATADC_P is directly connected to the charge pump 70 .

[0088] In the exemplary embodiment of the present disclosure, the second signal transmission circuit BATADC_N is directly connected to the charge pump 70 .

[0089] In some embodiments, the battery is provided with a temperature sensor, the charging detection circuit includes a temperature detection circuit, the temperature detection circuit is connected between the negative pole of the first connector and the positive pole of the temperature sensor, and the ground of the temperature sensor is connected to the positive pole of the second connector.

[0090] In an exemplary embodiment of the present disclosure, the electronic device may further include a BS MOS and a diode, and about three MOS may be provided in the BS MOS. The BS MOS, the diode, and the encryption circuit BAT_SIO cooperate with each other to realize a single line for power supply and communication. Compared with the solution of separate lines for power supply and communication in the related art, the present disclosure can reduce impedance and cost, and achieve better charging efficiency.

[0091] According to the setting of the present disclosure, the two differential detection lines of the first signal transmission circuit BATADC_P and the second signal transmission circuit BATADC_N are respectively connected to the charging management module 60 to obtain the electrical signals of the positive and negative electrodes of the battery, so as to calculate the charging condition of the battery. Through such a setting, the charging condition of the battery can be obtained and the cost can also be reduced. Furthermore, since the present disclosure obtains the electrical signals of the positive and negative electrodes of the battery, the obtained charging condition of the battery is more accurate. In addition, the present disclosure is also provided with a first connector and a second connector connected to each other, so that fast charging can be achieved.

[0092] Compared with the power meter used in the relevant documents to detect the charging voltage, the present disclosure omits the setting of the power meter, which can save costs. According to the test, the setting of the present disclosure can reduce the cost of a single unit by about 2 yuan compared with the solution using the power meter.

[0093] It is understandable that the charging detection circuit, circuit board, and electronic device provided in the embodiments of the present disclosure include hardware structures and / or software modules corresponding to the execution of each function in order to realize the above functions. In combination with the units and algorithm steps of each example 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 function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiments of the present disclosure.

[0094] Figure 5 800 is a block diagram according to an exemplary embodiment. For example, the device 800 may be a mobile phone, a computer, a digital broadcast terminal, a message transceiving device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc. For example, the device 800 may be an electronic device as described above, for example, a mobile phone.

[0095] Reference Figure 5 , the device 800 may include one or more of the following components: a processing component 802 , a memory 804 , a power component 806 , a multimedia component 808 , an audio component 810 , an input / output (I / O) interface 812 , a sensor component 814 , and a communication component 816 .

[0096] The processing component 802 generally controls the overall operation of the device 800, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 802 may include one or more modules to facilitate the interaction between the processing component 802 and other components. For example, the processing component 802 may include a multimedia module to facilitate the interaction between the multimedia component 808 and the processing component 802.

[0097] The memory 804 is configured to store various types of data to support operations on the device 800. Examples of such data include instructions for any application or method operating on the device 800, contact data, phone book data, messages, pictures, videos, etc. The memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0098] The power component 806 provides power to the various components of the device 800. The power component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 800.

[0099] The multimedia component 808 includes a screen that provides an output interface between the device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front camera and / or a rear camera. When the device 800 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0100] The audio component 810 is configured to output and / or input audio signals. For example, the audio component 810 includes a microphone (MIC), and when the device 800 is in an operating mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 804 or sent via the communication component 816. In some embodiments, the audio component 810 also includes a speaker for outputting audio signals.

[0101] I / O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: home button, volume button, start button, and lock button.

[0102] The sensor assembly 814 includes one or more sensors for providing various aspects of the status assessment of the device 800. For example, the sensor assembly 814 can detect the open / closed state of the device 800, the relative positioning of components, such as the display and keypad of the device 800, and the sensor assembly 814 can also detect the position change of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration / deceleration of the device 800, and the temperature change of the device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0103] The communication component 816 is configured to facilitate wired or wireless communication between the device 800 and other devices. The device 800 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0104] In an exemplary embodiment, the apparatus 800 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to perform the above method.

[0105] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, and the instructions can be executed by the processor 820 of the device 800 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0106] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0107] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0108] It will be further understood that the terms “center”, “longitudinal”, “lateral”, “front”, “back”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0109] It can be further understood that, unless otherwise specified, “connection” includes a direct connection without other components between the two, and also includes an indirect connection with other components between the two.

[0110] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

[0111] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0112] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A charging detection circuit, characterized in that: include: A charging management module, used to manage the charging and discharging of the battery; A first connector connected to the charging management module; A second connector connected to the first connector, and the second connector is connected to a charging management module; a first signal transmission circuit, the first signal transmission circuit being connected to the first connector and communicating with the charging management module to obtain an electrical signal of the positive electrode of the battery; as well as a second signal transmission circuit, the second signal transmission circuit being connected to the first connector, and the second signal transmission circuit being connected to the charging management module to obtain an electrical signal of the negative electrode of the battery, Wherein, the first signal transmission circuit and the second signal transmission circuit are differential detection lines.

2. The charging detection circuit according to claim 1, characterized in that: The charging management module includes a first port and a second port, The first signal transmission circuit is connected to the first port to obtain the voltage signal of the positive electrode of the battery, and the second signal transmission circuit is connected to the second port to obtain the voltage signal of the negative electrode of the battery.

3. The charging detection circuit according to claim 1, characterized in that: The first signal transmission circuit is connected to the positive pole of the first connector, and the second signal transmission circuit is connected to the negative pole of the first connector.

4. The charging detection circuit according to claim 1, characterized in that: The charging detection circuit also includes: A sampling resistor is connected between the charging management module and the first connector and the second connector.

5. The charging detection circuit according to claim 4, characterized in that: The charging detection circuit comprises: a third signal transmission circuit, the third signal transmission circuit being connected to the sampling resistor, and the third signal transmission circuit being connected to the charging management module to transmit a current signal of the positive electrode of the battery; and A fourth signal transmission circuit is connected to the sampling resistor, and the fourth signal transmission circuit is connected to the charging management module to transmit the current signal of the negative electrode of the battery.

6. The charging detection circuit according to claim 1, characterized in that: The charging detection circuit also includes: A reference signal transmission circuit is connected to the second connector, and the reference signal transmission circuit is connected to the charging management module to transmit a charging reference voltage of the battery.

7. The charging detection circuit according to claim 4, characterized in that: The sampling resistor is connected to the cathode of the first connector and is also connected to the cathode of the second connector.

8. The charging detection circuit according to claim 4, characterized in that: The cathode of the first connector and the cathode of the second connector are connected to a first node, and one end of the sampling resistor is connected to the first node.

9. The charging detection circuit according to claim 1, characterized in that: The charging detection circuit comprises: An energy storage element, wherein the energy storage element is anti-static by storing energy, the energy storage element is connected between the first connector and the first signal transmission circuit, and / or the energy storage element is connected between the first connector and the second signal transmission circuit.

10. The charging detection circuit according to claim 1, characterized in that: The first signal transmission circuit is directly connected to the charge pump; and / or The second signal transmission circuit is directly connected to the charge pump.

11. The charging detection circuit according to claim 9, characterized in that: The energy storage element is a resistor, a capacitor or an inductor.

12. The charging detection circuit according to claim 1, characterized in that: The negative pole of the second connector is grounded.

13. The charging detection circuit according to claim 1, characterized in that: The charging detection circuit includes an encryption circuit for transmitting an encrypted signal of the charging protocol of the battery, and the encryption circuit is connected to the positive pole of the first connector.

14. The charging detection circuit according to claim 1, characterized in that: The charging detection circuit includes a temperature detection circuit connected between the negative electrode of the first connector and the positive electrode of the temperature sensor of the battery, and the ground of the temperature sensor of the battery is connected to the positive electrode of the second connector.

15. The charging detection circuit according to claim 1, characterized in that: The charging detection circuit includes an in-place detection circuit, and the in-place detection circuit is used to transmit a connection signal of the second connector, and the in-place detection circuit is connected to the positive electrode of the second connector.

16. The charging detection circuit according to claim 1, characterized in that: The first signal transmission circuit and the second signal transmission circuit are connected in parallel.

17. A circuit board, characterized in that: include: Motherboard; as well as The charging detection circuit according to any one of claims 1 to 16, wherein the charging detection circuit is arranged on the mainboard.

18. The circuit board according to claim 17, characterized in that: The mainboard includes a digital-to-analog conversion module, and the negative electrode of the second connector is connected to the ground of the digital-to-analog conversion module.

19. An electronic device, characterized in that: include: Battery; Motherboard; as well as The charging detection circuit according to any one of claims 1 to 16, wherein the charging detection circuit is arranged on the mainboard.

20. The electronic device according to claim 19, characterized in that: The electronic device comprises a charge pump, the first signal transmission circuit is directly connected to the charge pump; and / or the second signal transmission circuit is directly connected to the charge pump.

21. The electronic device according to claim 19, characterized in that: The battery is provided with a temperature sensor, The charging detection circuit includes a temperature detection circuit connected between the negative electrode of the first connector and the positive electrode of the temperature sensor, and the ground of the temperature sensor is connected to the positive electrode of the second connector.

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