Power supply cable and method of power supply thereof

Abstract

The embodiment of the present application provides a power supply cable and a power supply method thereof, relates to the technical field of power supply, and is used for solving the problem of how to meet the power supply demand of a load end. The power supply cable comprises an input end and an output end; an electric signal threshold detection circuit is coupled with the input end and the output end, is used for detecting an electric signal between the input end and the output end, comparing the electric signal with a first threshold value, and outputting a comparison result; a control circuit is coupled with the electric signal threshold detection circuit, is used for outputting a first control signal according to the comparison result; a power supplementing battery is used for auxiliary power supply; and a voltage increasing circuit is coupled with the power supplementing battery and the control circuit, is used for controlling whether the voltage value of the electric signal output by the power supplementing battery is increased to a first set value under the control of the first control signal, and is transmitted to the output end.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply, in particular to a power supply cable and a power supply method thereof. BACKGROUND

[0002] In recent years, virtual reality (VR) devices have once triggered a technology boom, and many types of VR devices have appeared in the market. VR devices mainly include display and processing modules. According to whether the display and processing are on the same component, VR devices are divided into two categories: all-in-one VR devices (both display and processing are completed by the VR device) or discrete VR devices.

[0003] Different types of VR devices have different power supply methods. Some have built-in batteries, some are powered by personal computers (PCs) or mobile phones, some are powered by two types of devices, and some are powered by additional power supply devices. Figure 1a and Figure 1b As shown in FIG. 1, an all-in-one VR device has a built-in battery. As shown in FIG. 2, a mobile phone type discrete VR device does not need to be powered. As shown in FIG. 3 and FIG. 4, a PC or mobile phone type discrete VR device is connected to a power supply device through a power supply cable. Figure 1c Figure 1d and Figure 1e As shown in FIG. 5, the power supply device provides a power supply current and a power supply voltage, which are almost a fixed value (for example, 1A). However, due to sudden large volume output, backlight lighting time period of VR plug black scheme and other special moments, the peak pulse current of the VR device may exceed the power supply capacity of the power supply device.

[0004] Therefore, how to meet the power supply requirements of some loads (such as VR devices) that need to be powered has become a technical problem that needs to be solved by those skilled in the art. Figure 1f SUMMARY

[0005] The embodiments of the present application provide a power supply cable and a power supply method thereof, which are used to solve the problem of how to meet the power supply requirements of loads. SUMMARY

[0006] The embodiments of the present application provide a power supply cable and a power supply method thereof, which are used to solve the problem of how to meet the power supply requirements of loads.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] ​In a first aspect, the present application provides a power cable, comprising: an input end and an output end; an electrical signal threshold detection circuit coupled to the input end and the output end, configured to detect an electrical signal between the input end and the output end, compare the electrical signal with a first threshold value, and output a comparison result; a control circuit coupled to the electrical signal threshold detection circuit, configured to output a first control signal according to the comparison result; a power supplementing battery configured to assist power supply; and a voltage boosting circuit coupled to the power supplementing battery and the control circuit, configured to control, under control of the first control signal, whether to raise a voltage value of an electrical signal output by the power supplementing battery to a first set value and transmit the electrical signal to the output end. The power cable provided by the present application combines the electrical signal output by the power supplementing battery after the electrical signal is boosted by the voltage boosting circuit (i.e., after the auxiliary power supply path is boosted) with the main power supply path, without regulating the voltage of the main power supply path. The power cable realizes auxiliary power supply by the power supplementing battery and does not reduce the power supply efficiency of the main power supply path, thereby avoiding the efficiency loss caused by twice voltage regulation of the main power supply path and ensuring the endurance and heating experience of the power supply device in this scenario.

[0009] Optionally, the power cable further comprises a charging circuit, the charging circuit being coupled to the input end, the control circuit, and the power supplementing battery, and configured to control whether to charge the power supplementing battery through the input end according to the power of the power supplementing battery and the first control signal. The charging circuit is arranged in the power cable, and when the power of the power supplementing battery is low and the power supplementing battery is not powered, the charging circuit can charge the power supplementing battery. In this way, the power cable can be repeatedly used, and the cost performance of the power cable is improved.

[0010] Optionally, the electrical signal threshold detection circuit comprises a current threshold detection circuit.

[0011] Optionally, the electrical signal threshold detection circuit comprises a voltage threshold detection circuit.

[0012] Optionally, the control circuit is integrated in the electrical signal threshold detection circuit. In this way, the structure layout is more compact.

[0013] Optionally, the electrical signal threshold detection circuit is further configured to transmit the electrical signal of the input end to the output end. In this way, the power transmission of the main power supply path is completed.

[0014] In a second aspect, the application provides a power supply method for a power supply cable, the power supply cable comprising an input end, an output end, an electrical signal threshold detection circuit, a control circuit, a power supply battery and a voltage boosting circuit. The power supply method comprises: the electrical signal threshold detection circuit detecting an electrical signal between the input end and the output end, comparing the electrical signal with a first threshold value, and outputting a comparison result; the control circuit outputting a first control signal according to the comparison result; and the voltage boosting circuit controlling, under the control of the first control signal, whether to increase a voltage value of an electrical signal output by the power supply battery to a first set value and transmit the electrical signal to the output end. In the power supply process of the power supply cable, the normal power supply state, the power supply battery power supply state and the power supply battery charging state can be dynamically and automatically converted, and the performance of the power supply cable is improved.

[0015] Optionally, the electrical signal threshold detection circuit comprises a current threshold detection circuit; and the control circuit outputting the first control signal according to the comparison result comprises: when the electrical signal is greater than the first threshold value, the first control signal output by the control circuit controls the voltage boosting circuit to be turned on; and when the electrical signal is less than the first threshold value, the first control signal output by the control circuit controls the voltage boosting circuit to be turned off.

[0016] Optionally, the electrical signal threshold detection circuit comprises a voltage threshold detection circuit; and the control circuit outputting the first control signal according to the comparison result comprises: when the electrical signal is less than the first threshold value, the first control signal output by the control circuit controls the voltage boosting circuit to be turned on; and when the electrical signal is greater than the first threshold value, the first control signal output by the control circuit controls the voltage boosting circuit to be turned off.

[0017] Optionally, the voltage boosting circuit controls, under the control of the first control signal, whether to increase the voltage value of the electrical signal output by the power supply battery to the first set value and transmit the electrical signal to the output end, comprising: the voltage boosting circuit being turned on under the control of the first control signal, increasing the voltage value of the electrical signal output by the power supply battery to the first set value, and transmitting the electrical signal to the output end; and the voltage boosting circuit being turned off under the control of the first control signal, stopping increasing the voltage value of the electrical signal output by the power supply battery to the first set value, and stopping transmitting the electrical signal to the output end.

[0018] Optionally, the power supply cable further comprises a charging circuit; and the power supply method further comprises: the charging circuit controlling, according to the power of the power supply battery and the first control signal, whether to charge the power supply battery through the input end.

[0019] Optionally, the charging circuit controls, according to the power of the power supply battery and the first control signal, whether to charge the power supply battery through the input end, comprising: in the case that the power of the power supply battery is less than a second set value and the first control signal controls the voltage boosting circuit to be turned off, the charging circuit charges the power supply battery through the input end; and in the case that the power of the power supply battery is greater than a third set value or the first control signal controls the voltage boosting circuit to be turned on, the charging circuit stops charging the power supply battery through the input end. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figures 1a-1e A structural schematic diagram of a VR terminal device provided by the related art;

[0021] Figure 1f A power supply requirement situation diagram for a VR terminal device;

[0022] Figure 2a An external structural schematic diagram of a mobile phone, a power supply cable and a VR terminal device provided by an embodiment of the present application;

[0023] Figure 2b An internal structural schematic diagram of a mobile phone, a power supply cable and a VR terminal device provided by an embodiment of the present application;

[0024] Figure 3a A structural schematic diagram of a power supply cable provided by an embodiment of the present application;

[0025] Figure 3b A structural schematic diagram of another power supply cable provided by an embodiment of the present application;

[0026] Figure 3c A structural schematic diagram of still another power supply cable provided by an embodiment of the present application;

[0027] Figure 4a A power supply method schematic diagram of a power supply cable provided by an embodiment of the present application;

[0028] Figure 4b A transition condition schematic diagram between various states in a power supply process of a power supply cable provided by an embodiment of the present application;

[0029] Figure 5a A power supply method schematic diagram of another power supply cable provided by an embodiment of the present application;

[0030] Figure 5b A transition condition schematic diagram between various states in a power supply process of another power supply cable provided by an embodiment of the present application. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0032] Hereinafter, the terms "second," "first," etc., are used for descriptive convenience only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature qualified as "second," "first," etc., may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0033] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left", and "right" may be defined including but not limited to the orientation relative to the schematic placement of the components in the drawings. It should be understood that these directional terms may be relative concepts, which are used for relative descriptions and clarifications, and may change accordingly according to changes in the orientation of the components in the drawings.

[0034] In this application, unless otherwise specified or limited, the term "connect" should be understood broadly. For example, "connection" can refer to fixed connection, detachable connection, or integration; it can refer to direct connection or indirect connection through an intermediate medium. In addition, the term "coupling" can refer to direct electrical connection or indirect electrical connection through an intermediate medium.

[0035] For loads that require power, the power supply significantly impacts their performance. Examples include mobile phones, tablets, smart wearables (e.g., smart watches, smart bands), virtual reality (VR) and augmented reality (AR) devices, rechargeable small household appliances (e.g., soymilk makers, robot vacuums), drones, 5G communication equipment, and USB devices (e.g., storage devices, keyboards, and external hard drives).

[0036] An embodiment of the present application provides a power supply cable for supplying power to a load through a power supply device (eg, a personal computer, a mobile phone).

[0037] In the embodiment of the present application, the load is a VR terminal device and the power supply device is a mobile phone as an example for description.

[0038] like Figure 2a As shown, one end of the power supply cable 10 is connected to the mobile phone, and the other end is connected to the VR terminal device to provide power to the VR terminal device.

[0039] Regarding the implementation method of the mobile phone supplying power to the VR terminal device through the cable 10, Figure 2bAs shown, the electrical signal (e.g. 3.8V) in the mobile phone battery is boosted by a boost circuit in the mobile phone and transmitted from the interface of the mobile phone and the power cable 10 to the power cable 10. For example, the mobile phone transmits an electrical signal of 5V, 1A to the power cable 10.

[0040] In order to supplement the power supply when the power supply from the mobile phone to the VR terminal device cannot meet the demand of the VR terminal device, other components can supplement the power supply. For example, Figure 2b As shown, a power supply cable 10 is provided with a power supplement battery, and the power consumption of the VR terminal device within 1A is taken from the mobile phone, and the power consumption exceeding 1A is supplied by the power supplement battery.

[0041] In order to realize the above dynamic management, as shown, Figure 2b The power supply cable 10 includes a power supply chip, which includes a step-down circuit that receives the electrical signal (5V) output by the mobile phone and outputs the electrical signal from the power supply chip after reducing the voltage value of the electrical signal output by the mobile phone to the same voltage value as the power supplement battery (e.g. 3.8V). The power supply chip also includes a controllable switch coupled to the power supplement battery for controlling whether to output the electrical signal of the power supplement battery from the power supply chip.

[0042] In this way, the path where the step-down circuit is located serves as the main power supply path, and the path where the power supplement battery is located serves as the auxiliary power supply path. The power consumption of the VR terminal device within 1A is taken from the mobile phone, and the controllable switch is closed. The power consumption of the VR terminal device above 1A is partly taken from the mobile phone and partly taken from the power supplement battery, and the controllable switch is opened.

[0043] Based on this, as shown, Figure 2b The power supply cable 10 is also provided with a boost circuit, and the electrical signal output by the power supply chip is about 3.8V (e.g. an interval voltage of 3.2-4.4V), which is boosted to 5V by a boost circuit and supplied to the VR terminal device.

[0044] However, when the above power supply cable 10 supplies power, the main power supply path in the power supply cable 10 line has a conversion from 5V to 3.8V and then to 5V. This conversion will cause efficiency loss, and the conversion efficiency is about 90% (step-down conversion efficiency) * 88% (boost conversion efficiency) = 79.2%. This efficiency loss not only causes the mobile phone to consume power too quickly and reduce the battery life, but also causes the power supply cable 10 to heat up, which is not a good experience.

[0045] The embodiment of the present application also provides a power supply cable 10, as shown, Figure 3a The power supply cable 10 includes an input end I, an output end O, an electrical signal threshold detection circuit 11, a first control circuit 12, a power supplement battery 13, and a boost circuit 14.

[0046] The input end I and the output end O can be universal serial bus (USB) interfaces. In addition, the input end I and the output end O can be of the same type or different types.

[0047] The electrical signal threshold detection circuit 11 is coupled to the input end I and the output end O, and is configured to detect an electrical signal between the input end I and the output end O, compare the electrical signal with a first threshold value, and output a comparison result.

[0048] The first threshold value is selected in relation to the power supply capability of the power supply device coupled to the input end I. For example, the power supply device is a mobile phone with a power supply capability of 5V and 1A.

[0049] It can be understood that when the mobile phone is coupled to the input end I of the power supply cable 10 and the VR terminal device is coupled to the output end O of the power supply cable 10, a power supply circuit is formed. In the power supply circuit, the VR terminal device is equivalent to a variable resistor, and the VR terminal device has different equivalent resistance values in different functional states.

[0050] Based on this, when the VR terminal device has a large resistance value, the current value between the input end I and the output end O of the power supply cable 10 is small (less than 1A), indicating that the power supply capability of the mobile phone can meet the demand of the VR terminal device. When the VR terminal device has a small resistance value, the current value between the input end I and the output end O of the power supply cable 10 is large (greater than 1A), indicating that the power supply capability of the mobile phone cannot meet the demand of the VR terminal device. Therefore, by detecting the size of the current value between the input end I and the output end O and comparing the current value with the first threshold value (threshold current 1A), it can be determined whether the power supply capability of the mobile phone can meet the demand of the VR terminal device.

[0051] According to the power supply characteristics, when the current value between the input end I and the output end O is large, the voltage value of the mobile phone power supply cannot be stabilized at 5V, and will decrease. Therefore, by detecting the size of the voltage value between the input end I and the output end O and comparing the voltage value with the first threshold value (threshold voltage 5V), it can be determined whether the power supply capability of the mobile phone can meet the demand of the VR terminal device.

[0052] Therefore, the electrical signal threshold detection circuit 11 can detect the voltage value (i.e., the power supply voltage) between the input end I and the output end O, or can detect the current value (i.e., the load current) between the input end I and the output end O.

[0053] Based on this, in a possible embodiment, the electrical signal threshold detection circuit 11 includes a current threshold detection circuit. The first threshold value is, for example, the maximum power supply current value of the power supply device.

[0054] In another possible embodiment, the electrical signal threshold detection circuit 11 comprises a voltage threshold detection circuit. The first threshold value is, for example, the maximum supply voltage value of the power supply device.

[0055] In addition, it can be understood that the power cable 10 is configured to transmit the electrical signal at the input end I to the output end O, and the power cable 10 is further configured to be provided with a transmission circuit, which can be integrated in the electrical signal threshold detection circuit 11, for example. When the power cable 10 is connected to the mobile phone and the VR terminal device and is used to supply power, the mobile phone side outputs 5V to the main power supply path, and the electrical signal threshold detection circuit 11 in the power cable 10 is used to output the 5V to the VR terminal device to supply power.

[0056] The transmission circuit can be a wire, for example, or can further include other components.

[0057] That is, during the power supply process of the power cable 10, the electrical signal threshold detection circuit 11 is configured to detect the electrical signal between the input end I and the output end O, compare the electrical signal with the first threshold value, and output the comparison result.

[0058] The control circuit 12 is coupled to the electrical signal threshold detection circuit 11 and is configured to output a first control signal according to the comparison result output by the electrical signal threshold detection circuit 11.

[0059] The first control signal can be a signal for controlling the boost circuit to be turned on or a signal for controlling the boost circuit to be turned off according to the comparison result.

[0060] For example, the electrical signal threshold detection circuit 11 is configured to detect the current signal between the input end I and the output end O, and the electrical signal threshold detection circuit 11 is configured to compare the current signal with the first threshold current. When the comparison result output by the electrical signal threshold detection circuit 11 is that the current signal is greater than the first threshold current, it indicates that the auxiliary charging of the power supplement battery 13 is needed. The first control signal output by the control circuit 12 is a signal for controlling the boost circuit 14 to be turned on. Similarly, when the comparison result output by the electrical signal threshold detection circuit 11 is that the current signal is less than or equal to the first threshold current, it indicates that the auxiliary charging of the power supplement battery 13 is not needed. The first control signal output by the control circuit 12 is a signal for controlling the boost circuit 14 to be turned off.

[0061] In another example, the electrical signal threshold detection circuit 11 is configured to detect a voltage signal between an input terminal I and an output terminal O. The electrical signal threshold detection circuit 11 compares the voltage signal with a first threshold voltage. If the comparison result output by the electrical signal threshold detection circuit 11 indicates that the voltage signal is less than the first threshold voltage, this indicates that auxiliary charging by the auxiliary battery 13 is required. The first control signal output by the control circuit 12 is a signal that controls the activation of the boost circuit 14. Similarly, if the comparison result output by the electrical signal threshold detection circuit 11 indicates that the voltage signal is greater than or equal to the first threshold voltage, this indicates that auxiliary charging by the auxiliary battery 13 is not required. The first control signal output by the control circuit 12 is a signal that controls the activation of the boost circuit 14.

[0062] Of course, if Figure 3b As shown, the above-mentioned control circuit 12 can be integrated into the electrical signal threshold detection circuit 11. The circuit composed of the electrical signal threshold detection circuit 11 and the control circuit 12 is used to detect the electrical signal between the input terminal I and the output terminal O, compare the electrical signal with the first threshold, and output a first control signal according to the comparison result.

[0063] That is, during the power supply process of the power supply cable 10 , the control circuit 12 completes the work of outputting the first control signal according to the comparison result.

[0064] like Figure 3a As shown, the boost circuit 14 is coupled to the supplementary battery 13 and the control circuit 12, and is used to control whether to increase the voltage value of the electrical signal output by the supplementary battery 13 to a first set value and transmit it to the output terminal O under the control of a first control signal.

[0065] That is, the electric signal threshold detection circuit 11 serves as a main power supply path and continuously supplies power, while the supplementary battery 13 serves as an auxiliary power supply path and determines whether power supply is required according to the first control signal.

[0066] The first control signal output by the control circuit 12 is a signal for turning on the boost circuit 14. Under the control of the first control signal, the boost circuit 14 increases the voltage of the electrical signal output by the supplemental battery 13 to a first set value and transmits it to the output terminal O. The first control signal output by the control circuit 12 is a signal for turning off the boost circuit 14. Under the control of the first control signal, the boost circuit 14 is turned off, and the electrical signal output by the supplemental battery 13 is not transmitted to the output terminal O.

[0067] That is, during the power supply process of the power supply cable 10 , the boost circuit 14 completes the work of controlling whether to increase the voltage value of the electrical signal output by the supplementary battery 13 to the first set value and transmit it to the output end O under the control of the first control signal.

[0068] In some embodiments, as Figure 3cAs shown, the power supply cable 10 further comprises a charging circuit 15. The charging circuit 15 is coupled with the input terminal I, the control circuit 12 and the backup battery 13, and is configured to control whether to charge the backup battery 13 through the input terminal I according to the backup battery 13 and the first control signal.

[0069] Optionally, when the backup battery 13 is less than the second set value, and the first control signal controls the boost circuit 14 to be closed, the charging circuit 15 charges the backup battery 13 through the input terminal I.

[0070] Optionally, when the backup battery 13 is greater than the third set value, the charging circuit 15 stops charging the backup battery 13 through the input terminal I.

[0071] Optionally, when the first control signal controls the boost circuit 14 to be opened, the charging circuit 15 stops charging the backup battery 13 through the input terminal I.

[0072] For example, the detection of the backup battery 13 can be completed by the charging circuit 15. The charging circuit 15 detects the backup battery 13, and adjusts the charging of the backup battery 13 according to the backup battery 13. When the charging circuit 15 receives the first control signal, the charging circuit 15 stops working.

[0073] Alternatively, for example, the detection of the backup battery 13 can be completed by a separate detection circuit. In this case, the power supply cable 10 further comprises a detection circuit, which is configured to detect the backup battery 13, and transmit the backup battery 13 to the control circuit. The control circuit 12 generates the second control signal according to the backup battery 13.

[0074] Regarding the second control signal, when the backup battery 13 is greater than the third set value, the second control signal controls the charging circuit 15 to be closed. When the backup battery 13 is less than the second set value, the second control signal controls the charging circuit 15 to be opened. The charging circuit 15 is configured to control whether to charge the backup battery 13 through the input terminal I according to the second control signal and the first control signal.

[0075] It can be understood that the second set value is necessarily less than the third set value.

[0076] That is, during the power supply of the power supply cable 10, the charging circuit 15 completes the work of controlling whether to charge the backup battery 13 through the input terminal I according to the backup battery 13 and the first control signal.

[0077] That is, the power supply cable 10 provided by the embodiment of the application also has the function of charging the backup battery 13. In this way, the power supply cable 10 can be repeatedly used, and the cost performance of the power supply cable 10 is improved.

[0078] As can be seen from the above description, the power cable 10 provided by the embodiment of the application combines the power signal output by the power supplementing battery 13 after the power signal is boosted by the boosting circuit 14 (i.e., after the auxiliary power supply path is boosted), without regulating the voltage of the main power supply path. The power supplementing battery 13 assists power supply, without reducing the power supply efficiency of the main power supply path, thereby avoiding the efficiency loss caused by twice voltage regulation of the main power supply path, and ensuring the endurance and heat experience of the power supply device in this scenario.

[0079] In addition, as shown in Figure 3c The power cable 10 is wrapped with an insulating skin, which insulates and blocks water and oxygen for the power cable 10.

[0080] On this basis, the power cable 10 can also be integrated with a function of realizing audio and video signal transmission between a mobile phone and a VR terminal device. The specific implementation manner can be the same as that in the related art.

[0081] Next, the power supply method of the power cable 10 provided by the embodiment of the application will be described in combination with the structure of the power cable 10.

[0082] Embodiment one

[0083] As shown in Figure 4a The power supply method of the power cable 10 includes:

[0084] During power supply, the current threshold detection circuit detects the power-on current (load current) between the input end I and the output end O, and compares the current signal with the first threshold current, and outputs a comparison result.

[0085] The comparison result is divided into two kinds, one is that the current signal is greater than the first threshold current, and the other is that the current signal is less than or equal to the first threshold current.

[0086] In the case that the current signal is greater than the first threshold current, the first control signal output by the control circuit 12 controls the boosting circuit 14 to be turned on.

[0087] The boosting circuit 14 is turned on under the control of the first control signal, the voltage value of the power signal output by the power supplementing battery 13 is raised to a first set value, and is transmitted to the output end O. The power supplementing battery 13 supplements power, and the auxiliary power supply path starts to supply power.

[0088] In the case that the current signal is less than or equal to the first threshold current, the first control signal output by the control circuit 12 controls the boosting circuit 14 to be turned off.

[0089] The boost circuit 14 is controlled by the first control signal to stop increasing the voltage value of the electric signal outputted by the backup battery 13 to the first set value and transmitting to the output terminal O. The backup battery 13 is not supplied with electricity and the auxiliary power supply path stops supplying electricity.

[0090] It can be understood that the current signal less than the first threshold current (the main power supply path supplies electricity alone) is divided into two cases: one case is that the main power supply path can meet the power supply demand at the beginning of charging, the current signal is less than or equal to the first threshold current, and the boost circuit 14 is closed. The other case is that the auxiliary power supply path assists the power supply after the main power supply path cannot meet the power supply demand, the current signal is greater than the first threshold current, and the boost circuit 14 is opened. The main power supply path can meet the power supply demand again, at this time the current signal is less than or equal to the first threshold current, and the boost circuit 14 is closed.

[0091] On this basis, in the process of power supply, when the electric quantity of the backup battery 13 is less than the second set value and the first control signal controls the boost circuit 14 to be closed, the charging circuit 15 charges the backup battery 13 through the input terminal I.

[0092] That is, when the electric quantity of the backup battery 13 is low and the backup battery 13 is not supplied with electricity and the auxiliary power supply path stops supplying electricity, the charging circuit 15 starts to work, the charging circuit 15 takes electricity from the input terminal I (the mobile phone supplies electricity to the input terminal I) and charges the backup battery 13 through the charging circuit 15.

[0093] When the electric quantity of the backup battery 13 reaches the third set value, the charging circuit 15 stops charging the backup battery 13 through the input terminal I.

[0094] Or, when the first control signal changes to control the boost circuit 14 to be opened, the charging circuit 15 stops charging the backup battery 13 through the input terminal I, and the backup battery 13 starts to supply electricity to the VR terminal device through the boost circuit 14.

[0095] It can be understood that from the above state changes, the charging circuit 15 for charging the backup battery 13 and the boost circuit 14 for supplying electricity to the VR terminal device do not work at the same time. There is no problem of the connection between the boost circuit 14 and the charging circuit 15 (the charging circuit 15 is a kind of step-down circuit).

[0096] As shown in Table 1, in the normal power supply state: the load current is less than the first threshold current (C1=0), the electric quantity of the backup battery 13 is greater than the second set value (C2=0), and the boost circuit 14 and the charging circuit 15 do not work.

[0097] In the charging state of the charging battery 13 : the load current is greater than the first threshold current ( C1 = 1), the power level of the charging battery 13 is greater than or less than the second set value ( C2 = X), the boost circuit 14 works, and the charging circuit 15 does not work.

[0098] When the supplementary battery 13 is in charging state: the load current is less than the first threshold current ( C1 = 0), the power level of the supplementary battery 13 is less than the second set value ( C2 = 1), the boost circuit 14 does not work, and the charging circuit 15 works.

[0099] Table 1 Switching conditions of each circuit in various states

[0100] State C1 C2 Normal supply state 0 0 Supplementary battery supplementary state 1 X Supplementary battery charging state 0 1

[0101] Wherein, C1 represents a current threshold detection circuit. When the current signal (load current) is greater than a first threshold current, the C1 signal is set to 1, otherwise it is set to 0.

[0102] C2 represents the power level of the supplementary battery 13 . When the power level of the supplementary battery 13 is less than a second set value, the C2 signal is set to 1, otherwise it is set to 0.

[0103] In this way, if Figure 4b As shown, the condition for changing from the normal power supply state to the charging state of the charging battery 13 is that the load current is greater than the first threshold current. The condition for changing from the charging state of the charging battery 13 to the normal power supply state is that the load current is less than the first threshold current.

[0104] The condition for transitioning from the normal power supply state to the charging state of the supplementary battery 13 is: the charge of the supplementary battery 13 is less than the second set value, and the load current is less than the first threshold current. The condition for transitioning from the charging state of the supplementary battery 13 to the normal power supply state is: the charge of the supplementary battery 13 is greater than the third set value.

[0105] The condition for the battery 13 to change from being in the charging state to being in the charging state is that the load current is greater than a first threshold current.

[0106] The power supply cable 10 provided in this embodiment of the application boosts the electrical signal output by the supplementary battery 13 through a boost circuit 14 (i.e., boosts the auxiliary power path), then merges it with the main power path without voltage regulation. This achieves auxiliary power supply from the supplementary battery 13 without reducing the power supply efficiency of the main power path, thus avoiding the efficiency loss of the main power path being regulated twice, and ensuring the battery life and heat dissipation of the power supply device in this scenario.

[0107] In addition, the power supply cable 10 is also provided with a charging circuit 15. When the power supply of the power supply cable 10 is needed, the charging circuit 15 can charge the power supply battery 13. In this way, the power supply cable 10 can be repeatedly used, and the performance-price ratio of the power supply cable 10 is improved.

[0108] Furthermore, during the power supply process of the power supply cable 10, the normal power supply state, the power supply state of the power supply battery 13, and the charging state of the power supply battery 13 can be dynamically and automatically converted, so that the performance of the power supply cable 10 is improved.

[0109] Embodiment Two

[0110] The difference between embodiment two and embodiment one is that the electric signal threshold detection circuit is a voltage threshold detection circuit.

[0111] As shown in Figure 5a , the power supply method of the power supply cable 10 comprises:

[0112] During the power supply process, the voltage threshold detection circuit detects the voltage signal (power supply voltage) between the input end I and the output end O, and compares the voltage signal with the first threshold voltage, and outputs the comparison result.

[0113] The comparison result is divided into two kinds, one is that the voltage signal is less than the first threshold voltage, and the other is that the voltage signal is greater than or equal to the first threshold voltage.

[0114] In the case that the voltage signal is less than the first threshold voltage, the first control signal output by the control circuit 12 controls the boost circuit 14 to be turned on.

[0115] The boost circuit 14 is turned on under the control of the first control signal, and the voltage value of the electric signal output by the power supply battery 13 is raised to the first set value and transmitted to the output end O.

[0116] In the case that the voltage signal is greater than or equal to the first threshold voltage, the first control signal output by the control circuit 12 controls the boost circuit 14 to be turned off.

[0117] The boost circuit 14 is turned off under the control of the first control signal, and stops raising the voltage value of the electric signal output by the power supply battery 13 to the first set value and transmitting to the output end O.

[0118] It is understood that there are two situations in which the voltage signal is greater than the first threshold voltage (the main power supply path is supplying power alone): one is that at the start of charging, the main power supply path can meet the power supply demand, the voltage signal is greater than or equal to the first threshold voltage, and the boost circuit 14 is turned off. The other is that after the main power supply path cannot meet the power supply demand, the auxiliary power supply path assists in power supply, the voltage signal is less than the first threshold voltage, and the boost circuit 14 is turned on. The main power supply path can meet the power supply demand again, and the voltage signal is greater than or equal to the first threshold voltage, and the boost circuit 14 is turned off.

[0119] On this basis, during the power supply process, when the power level of the supplementary battery 13 is greater than the second set value and the first control signal is to control the boost circuit 14 to be turned off, the charging circuit 15 charges the supplementary battery 13 through the input terminal I.

[0120] That is, when the charge of the supplementary battery 13 is low and the supplementary battery 13 is not being supplemented, and the auxiliary power supply path stops supplying power, the charging circuit 15 starts to work, and the charging circuit 15 draws power from the input terminal I (the mobile phone supplies power to the input terminal I) and charges the supplementary battery 13 through the charging circuit 15.

[0121] When the charge of the supplementary battery 13 reaches the third set value, the charging circuit 15 stops charging the supplementary battery 13 through the input terminal I.

[0122] Alternatively, when the first control signal changes to controlling the boost circuit 14 to turn on, the charging circuit 15 stops charging the supplementary battery 13 through the input terminal I, and the supplementary battery 13 starts to supplement power supply to the VR terminal device through the boost circuit 14.

[0123] It is understandable that, as can be seen from the preceding state changes, the charging circuit 15 for charging the supplementary battery 13 and the boost circuit 14 for supplementary powering the VR terminal device do not operate simultaneously. This does not cause the problem of the step-down circuit (the charging circuit 15 is a step-down circuit) and the boost circuit 14 being connected in front of each other.

[0124] As shown in Table 2, under normal power supply status: the load voltage is greater than the first threshold voltage (C1=0), the charge of the supplementary battery 13 is greater than the second set value (C2=0), and the boost circuit 14 and the charging circuit 15 are not working.

[0125] When the supplementary battery 13 is in the supplementary state, the load voltage is less than the first threshold voltage (C1=1), the charge level of the supplementary battery 13 is less than or greater than the second set value (C2=X), the boost circuit 14 operates, and the charging circuit 15 does not operate.

[0126] When the supplementary battery 13 is in charging state: the load voltage is greater than the first threshold voltage ( C1 = 0), the power level of the supplementary battery 13 is less than the second set value ( C2 = 1), the boost circuit 14 does not work, and the charging circuit 15 works.

[0127] Table 2 Switching conditions of each circuit in various states

[0128] State C1 C2 Normal supply state 0 0 Supplementary battery supplementary state 1 X Supplementary battery charging state 0 1

[0129] Wherein, C1 represents a voltage threshold detection circuit. When the voltage signal (power supply voltage) is less than a first threshold voltage, the C1 signal is set to 1, otherwise it is set to 0.

[0130] C2 represents the power level of the supplementary battery 13 . When the power level of the supplementary battery 13 is less than a second set value, the C2 signal is set to 1, otherwise it is set to 0.

[0131] In this way, if Figure 5b As shown, the condition for changing from the normal power supply state to the charging state of the charging battery 13 is that the power supply voltage is less than the first threshold voltage. The condition for changing from the charging state of the charging battery 13 to the normal power supply state is that the power supply voltage is greater than the first threshold voltage.

[0132] The condition for transitioning from the normal power supply state to the charging state of the supplementary battery 13 is: the charge of the supplementary battery 13 is less than the second set value and the supply voltage is greater than the first threshold voltage. The condition for transitioning from the charging state of the supplementary battery 13 to the normal power supply state is: the charge of the supplementary battery 13 is greater than the third set value.

[0133] The condition for the battery 13 to change from being in the charging state to being in the charging state is that the power supply voltage is less than a first threshold voltage.

[0134] It should be noted above that the selection of the first threshold, the first set value, the second set value, and the third set value in the embodiment of the present application can be adjusted according to the product.

[0135] The above is only a specific embodiment of the present application, but the scope of protection of this application is not limited to this. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A power cable, characterized in that The power supply cable comprises: an input end and an output end; a threshold detection circuit for detecting an electrical signal between the input end and the output end and comparing the electrical signal with a first threshold value, and outputting a comparison result; a control circuit coupled to the threshold detection circuit, for outputting a first control signal according to the comparison result; a backup battery for auxiliary power supply; a voltage boosting circuit coupled to the backup battery and the control circuit, for controlling whether to increase a voltage value of an electrical signal output by the backup battery to a first set value and transmit to the output end under the control of the first control signal.

2. The power supply cable according to claim 1, characterized in that, The power supply cable further comprises a charging circuit. The charging circuit is coupled to the input end, the control circuit and the backup battery, for controlling whether to charge the backup battery through the input end according to the power of the backup battery and the first control signal.

3. A power supply cable according to claim 1 or 2, c h a r a c t e r i z e d in that The threshold detection circuit comprises a current threshold detection circuit.

4. A power supply cable according to claim 1 or 2, c h a r a c t e r i z e d in that The threshold detection circuit comprises a voltage threshold detection circuit.

5. The power cable of claim 1, wherein, The control circuit is integrated in the threshold detection circuit.

6. The power cable of claim 1, wherein, The threshold detection circuit is further configured to transmit the electrical signal of the input end to the output end.

7. A power feeding method for a power feeding cable, characterized by, The power supply cable comprises an input end, an output end, a threshold detection circuit, a control circuit, a backup battery and a voltage boosting circuit. The power supply method of the power supply cable comprises: a threshold detection circuit detects an electrical signal between the input end and the output end, and compares the electrical signal with a first threshold value, and outputs a comparison result; a control circuit outputs a first control signal according to the comparison result; a voltage boosting circuit controls whether to increase a voltage value of an electrical signal output by the backup battery to a first set value and transmit to the output end under the control of the first control signal.

8. The power supply method of the power supply cable according to claim 7, wherein the threshold detection circuit comprises a current threshold detection circuit; the control circuit outputs a first control signal according to the comparison result, comprising: when the electrical signal is greater than the first threshold value, the first control signal output by the control circuit controls the voltage boosting circuit to be turned on; when the electrical signal is less than the first threshold value, the first control signal output by the control circuit controls the voltage boosting circuit to be turned off; or the threshold detection circuit comprises a voltage threshold detection circuit; the control circuit outputs a first control signal according to the comparison result, comprising: when the electrical signal is less than the first threshold value, the first control signal output by the control circuit controls the voltage boosting circuit to be turned on; when the electrical signal is greater than the first threshold value, the first control signal output by the control circuit controls the voltage boosting circuit to be turned off.

9. The power supply method of the power supply cable according to claim 8, wherein the voltage boosting circuit controls whether to increase a voltage value of an electrical signal output by the backup battery to a first set value and transmit to the output end under the control of the first control signal, comprising: The boost circuit is turned on under the control of the first control signal, and the voltage value of the electric signal output by the backup battery is raised to a first set value and transmitted to the output end; The boost circuit is turned off under the control of the first control signal, and the voltage value of the electric signal output by the backup battery is stopped from being raised to a first set value and transmitted to the output end.

10. The power feeding method of the power feeding cable according to claim 7, characterized by, The power supply cable further comprises a charging circuit; The power supply method of the power supply cable further comprises: The charging circuit controls whether to charge the backup battery through the input end according to the electric quantity of the backup battery and the first control signal.

11. The power feeding method of the power feeding cable according to claim 10, characterized by, The charging circuit controls whether to charge the backup battery through the input end according to the electric quantity of the backup battery and the first control signal, comprising: In the case that the electric quantity of the backup battery is less than a second set value and the first control signal controls the boost circuit to be turned off, the charging circuit charges the backup battery through the input end; In the case that the electric quantity of the backup battery is greater than a third set value or the first control signal controls the boost circuit to be turned on, the charging circuit stops charging the backup battery through the input end.

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