Remote control key

Abstract

The utility model discloses a remote control key which comprises a battery, a power management chip, an energy storage module, a Bluetooth chip and an ultra-wideband communication chip, the power management chip is electrically connected with the Bluetooth chip, the ultra-wideband communication chip, the energy storage module and the battery, and the power management chip is used for supplying power to the Bluetooth chip and the ultra-wideband communication chip according to a signal output by the battery and charging the energy storage module; the Bluetooth chip is connected with the ultra-wideband communication chip, the Bluetooth chip is used for detecting the working state of the ultra-wideband communication chip and outputting a state signal, and the power management chip is also used for connecting or disconnecting the energy storage module and the ultra-wideband communication chip according to the state signal. The remote control key provided by the utility model can prolong the service life of the battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to radio frequency communication technical field especially relates to a remote control key. BACKGROUND

[0002] Remote control keys communicate with vehicles through radio signals. When a user operates the keys on the key, it will emit specific radio signals, which are captured and identified by the receiver on the vehicle, and then trigger the corresponding operation.

[0003] At present, the power supply of the load such as the Bluetooth chip and the ultra-wideband communication chip in the remote control key is directly connected from the battery. When the ultra-wideband communication chip is turned on, the large current (the maximum current may be greater than 100 mA) in the radio frequency working moment will have a great impact on the battery, thereby directly affecting the battery life. INVENTION CONTENTS

[0004] The utility model provides a remote control key to solve the influence of the large current in the radio frequency working moment on the battery in the prior art.

[0005] According to an aspect of the utility model, a remote control key is provided, characterized in that it comprises a battery, a power management chip, an energy storage module, a Bluetooth chip and an ultra-wideband communication chip.

[0006] The power management chip is electrically connected with the Bluetooth chip, the ultra-wideband communication chip, the energy storage module and the battery, and the power management chip is used for powering the Bluetooth chip and the ultra-wideband communication chip according to the signal output by the battery, and charging the energy storage module.

[0007] The Bluetooth chip and the ultra-wideband communication chip are connected, the Bluetooth chip is used for detecting the working state of the ultra-wideband communication chip and outputting a state signal, and the power management chip is further used for turning on or disconnecting the connection between the energy storage module and the ultra-wideband communication chip according to the state signal.

[0008] Optionally, the power management chip comprises a power input end, a power output end, an energy storage connection end, a communication end, a control module, a first power supply branch and a second power supply branch; the first power supply branch is electrically connected with the power input end, the power output end and the energy storage connection end, and the first power supply branch is used for powering the power output end and the energy storage connection end; the input end of the second power supply branch is electrically connected with the energy storage connection end, the output end of the second power supply branch is electrically connected with the power output end, and the control end of the second power supply branch is electrically connected with the control module; the control module is used for controlling the second power supply branch to be turned on or disconnected.

[0009] Optionally, the first power supply branch comprises a current limiting module and a voltage conversion module, a first end of the current limiting module is connected with the power input end, a second end of the current limiting module is connected with an input end of the voltage conversion module, a first output end of the voltage conversion module is connected with the energy storage connection end, a second output end of the voltage conversion module is connected with the power output end, the current limiting module is used for limiting the current of the signal output by the battery, and the voltage conversion module is used for converting the voltage of the signal output by the current limiting module.

[0010] Optionally, the second power supply branch comprises a first switch module, a first end of the first switch module is connected with an input end of the second power supply branch, a second end of the first switch module is connected with an output end of the second power supply branch, a control end of the first switch module is connected with a control end of the second power supply branch, and the first switch module is used for being turned on or turned off according to the signal output by the control module.

[0011] Optionally, the power management chip further comprises a first comparison module, a first input end of the first comparison module is connected with the signal of the power input end, a second input end of the first comparison module is connected with the signal of the power output end, an output end of the first comparison module is connected with the control module, and the first comparison module is used for comparing the signal of the power input end with the signal of the power output end, and the control module is further used for controlling the voltage conversion module to be boosted or stepped down according to the signal output by the first comparison module.

[0012] Optionally, the power management chip further comprises a second comparison module, a first input end of the second comparison module is connected with the signal of the energy storage connection end, a second input end of the second comparison module is connected with a preset reference signal, an output end of the second comparison module is connected with the control module, and the control module is further used for controlling the working state of the Bluetooth chip according to the signal output by the second comparison module.

[0013] Optionally, the Bluetooth chip comprises a second switch module, the second switch module is connected with the ultra-wideband communication chip and the control module, the second switch module is used for being turned on or turned off according to the working state of the ultra-wideband communication chip, and the control module is further used for controlling the second power supply branch to be turned on or turned off according to the signal output by the second switch module.

[0014] Optionally, the energy storage module comprises a first capacitor, a first end of the first capacitor is connected with the energy storage connection end, and a second end of the first capacitor is grounded.

[0015] Optionally, the remote key further comprises a second capacitor and a third capacitor, a first end of the second capacitor is connected to the positive pole of the battery, a first end of the third capacitor is connected to the power output end, and a second end of the second capacitor and a second end of the third capacitor are grounded.

[0016] Optionally, the power management chip further comprises a first inductor and an inductor connection end, and the first inductor is connected to the voltage conversion module through the inductor connection end.

[0017] The technical scheme of the embodiment of the utility model provides a remote key, including battery, power management chip, energy storage module, bluetooth chip and ultra wide band communication chip, power management chip is according to the signal of battery output and is powered for bluetooth chip and ultra wide band communication chip, and is charged for energy storage module, bluetooth chip and ultra wide band communication chip are connected, bluetooth chip is used to detect the working condition of ultra wide band communication chip and exports state signal, power management chip is also used to according to state signal and turn on or disconnect the connection of energy storage module and ultra wide band communication chip, wherein, bluetooth chip detects the opening signal when ultra wide band communication chip opens, and power management chip turns on the connection of energy storage module and ultra wide band communication chip according to the opening signal received, and energy storage module discharges, to adapt to the large current of radio frequency working moment, ensure that the battery output current is stable in small current, can effectively prolong the battery life, solve the influence of the large current of radio frequency working moment to the battery in the prior art.

[0018] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the utility model, and is not used to limit the scope of the utility model. Other features of the utility model will become easy to understand through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0020] Figure 1 It is a structure schematic diagram of a remote key provided by the embodiment of the utility model;

[0021] Figure 2 It is a circuit diagram of a remote key provided by the embodiment of the utility model;

[0022] Figure 3 It is a waveform diagram of the charging and discharging process of the energy storage module provided by the embodiment of the utility model. DETAILED DESCRIPTION

[0023] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0024] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0025] The embodiment of the present application provides a kind of remote key, Figure 1 It is the structural schematic diagram of a kind of remote key provided by the embodiment of the present application, as Figure 1 As shown, the remote key includes battery 110, power management chip 120, energy storage module 130, Bluetooth chip 140 and ultra-wideband communication chip 150;Power management chip 120 is electrically connected with Bluetooth chip 140, ultra-wideband communication chip 150, energy storage module 130 and battery 110, and power management chip 120 is used to power supply Bluetooth chip 140 and ultra-wideband communication chip 150 according to the signal output by battery 110, and charge energy storage module 130;Bluetooth chip 140 and ultra-wideband communication chip 150 are connected, and Bluetooth chip 140 is used to detect the working state of ultra-wideband communication chip 150 and output state signal, and power management chip 120 is also used to turn on or disconnect the connection of energy storage module 130 and ultra-wideband communication chip 150 according to state signal.

[0026] In this embodiment, the battery 110 powers the remote key to ensure the normal operation of the remote key, for example, the battery 110 is a button cell. The power management chip 120 is an integrated circuit for managing and controlling the power supply in an electronic device, and the main functions include voltage regulation, power conversion, power distribution, etc., to ensure that each component in the electronic device can operate at the correct voltage and current level. The energy storage module 130 is a module that stores electrical energy, for example, the energy storage module 130 includes an energy storage capacitor. The Bluetooth chip 140 is a miniature electronic component that integrates Bluetooth wireless communication functions, mainly used for wireless connection and data transmission between devices. The ultra-wideband communication chip 150 is an integrated circuit chip that supports ultra-wideband communication and is the core component of ultra-wideband communication. It transmits a series of ultra-short pulse signals to realize data transmission. The time width of these ultra-short pulse signals is very narrow, which can reach nanoseconds, so the frequency of the signal is very high, which can occupy a very wide frequency spectrum (i.e. radio frequency signal), thereby realizing high-speed data transmission.

[0027] In this embodiment, after the remote key is turned on, the power management chip 120 supplies power to the Bluetooth chip 140 and the ultra-wideband communication chip 150 according to the signal output by the battery 110, and charges the energy storage module 130. After the energy storage module 130 is fully charged, it automatically supplies power to the Bluetooth chip 140 and the ultra-wideband communication chip 150. After the Bluetooth chip 140 is working normally, the power management chip 120 supplies power to the Bluetooth chip 140 and the ultra-wideband communication chip 150 according to the signal output by the battery 110, and charges the energy storage module 130. After the energy storage module 130 is fully charged, the power management chip 120 controls the Bluetooth chip 140 to start the detection function. The Bluetooth chip 140 detects the working state of the ultra-wideband communication chip 150, for example, when the Bluetooth chip 140 detects that the ultra-wideband communication chip 150 is turned on, it outputs an on signal. The power management chip 120 turns on the connection between the energy storage module 130 and the ultra-wideband communication chip 150 according to the received on signal. The energy storage module 130 discharges and supplies power to the ultra-wideband communication chip 150 together with the battery 110, which can meet the large current of the radio frequency working instant when the ultra-wideband communication chip 150 is turned on, and ensure that the output current of the battery is stable at a small current.

[0028] The remote key provided by the embodiment technical scheme comprises a battery, a power management chip, an energy storage module, a Bluetooth chip and an ultra-wideband communication chip; the power management chip supplies power for the Bluetooth chip and the ultra-wideband communication chip according to a signal output by the battery, and charges the energy storage module; the Bluetooth chip and the ultra-wideband communication chip are connected, the Bluetooth chip is used for detecting a working state of the ultra-wideband communication chip and outputting a state signal, and the power management chip is further used for turning on or turning off the connection between the energy storage module and the ultra-wideband communication chip according to the state signal, wherein the Bluetooth chip outputs an opening signal when detecting that the ultra-wideband communication chip is opened, the power management chip turns on the connection between the energy storage module and the ultra-wideband communication chip according to the received opening signal, and the energy storage module is discharged to adapt to a large current in a radio frequency working instant, so that the battery output current is stabilized at a small current, the battery life is effectively prolonged, and the influence of the large current in the radio frequency working instant on the battery in the prior art is solved.

[0029] Figure 2 It is a circuit diagram of the remote key provided by the embodiment of the utility model, as shown in Figure 2 The power management chip 120 comprises a power input end IN, a power output end OUT, an energy storage connection end C, a communication end T, a control module 210, a first power supply branch 220 and a second power supply branch 230; the first power supply branch 220 is electrically connected with the power input end IN, the power output end OUT and the energy storage connection end C, and the first power supply branch 220 is used for supplying power for the power output end OUT and the energy storage connection end C; the input end of the second power supply branch 230 is electrically connected with the energy storage connection end C, the output end of the second power supply branch 230 is electrically connected with the power output end OUT, and the control end of the second power supply branch 230 is electrically connected with the control module 210; the control module 210 is used for controlling the second power supply branch 230 to be turned on or turned off.

[0030] With reference to the above embodiment, the first power supply branch 220 is a circuit for the battery 110 to supply power for the Bluetooth chip 140 and the ultra-wideband communication chip 150 and charge the energy storage module 130 after the remote key is started and the Bluetooth chip 140 normally works. The second power supply branch 230 is a circuit for the energy storage module 130 to discharge and supply power for the ultra-wideband communication chip 150 after the Bluetooth chip 140 normally works. The control module 210 is a core module in the power management chip 120, and realizes data transmission and data processing. When the Bluetooth chip 140 detects that the ultra-wideband communication chip 150 is opened, an opening signal is output, the control module 210 turns on the second power supply branch 230 according to the received opening signal, the energy storage module 130 discharges, and the battery 110 and the energy storage module 130 jointly supply power for the ultra-wideband communication chip 150.

[0031] Specifically, the first power supply branch 220 includes a current limiting module and a voltage conversion module, a first end of the current limiting module is connected with the power input end IN, a second end of the current limiting module is connected with an input end of the voltage conversion module, a first output end of the voltage conversion module is connected with the energy storage connection end C, a second output end of the voltage conversion module is connected with the power output end OUT, the current limiting module is used for limiting the signal output by the battery 110, and the voltage conversion module is used for voltage conversion on the signal output by the current limiting module.

[0032] In the embodiment, the current limiting module is a module for limiting the current output by the battery 110, for example, the current limiting module includes a controlled current source, and the current output by the controlled current source can be limited to 2-16 mA due to the adjustment in the power management chip 120. The voltage conversion module is a module for converting the voltage signal output by the current limiting module, for example, the voltage conversion module includes a boost conversion circuit and a buck conversion circuit, and realizes boost and buck processing on the input voltage signal.

[0033] The second power supply branch includes a first switch module K1, a first end of the first switch module K1 is connected with the input end of the second power supply branch 230, a second end of the first switch module K1 is connected with the output end of the second power supply branch 230, a control end of the first switch module K1 is connected with the control end of the second power supply branch 230, and the first switch module K1 is used for being turned on or turned off according to the signal output by the control module 210.

[0034] On the basis of the above embodiment, the first switch module K1 can be a mechanical switch, a power switch device, etc., the first switch module K1 is arranged in the power conversion module, and the first switch module K1 is turned on or turned off according to the signal output by the control module 210. The control module 210 controls the first switch module to be closed according to the received opening signal, the energy storage module 130 is discharged, and the battery 110 together supplies power to the ultra-wideband communication chip 150.

[0035] Continuing to refer to Figure 2 The power management chip 120 further includes a first comparison module, a first input end of the first comparison module is connected with the signal of the power input end IN, a second input end of the first comparison module is connected with the signal of the power output end OUT, an output end of the first comparison module is connected with the control module 210, and the first comparison module is used for comparing the signal of the power input end IN and the signal of the power output end OUT. The control module 210 is further used for controlling the voltage conversion module to boost or buck according to the signal output by the first comparison module.

[0036] In the embodiment, the first comparison module includes a first comparator U1, which is configured to compare the signal at the power input terminal IN with the signal at the power output terminal OUT. For example, when the signal at the power input terminal IN is greater than the signal at the power output terminal OUT, the first comparator U1 outputs a high-level signal, and the control module 210 controls the voltage conversion module to start the voltage reduction function according to the received high-level signal. When the signal at the power input terminal IN is less than the signal at the power output terminal OUT, the first comparator U1 outputs a low-level signal, and the control module 210 controls the voltage conversion module to start the voltage increase function according to the received low-level signal, so that the voltage at the power output terminal OUT is finally stabilized at the battery voltage.

[0037] With reference to the above embodiment, Figure 2 The power management chip 120 further includes a second comparison module, a first input terminal of the second comparison module is connected to the signal at the energy storage connection terminal C, a second input terminal of the second comparison module is connected to the preset reference signal Vref, and an output terminal of the second comparison module is connected to the control module 210. The control module 210 is further configured to control the working state of the Bluetooth chip 140 according to the signal output by the second comparison module.

[0038] With reference to the above embodiment, the energy storage module 130 includes a first capacitor C1, a first terminal of the first capacitor C1 is connected to the energy storage connection terminal C, and a second terminal of the first capacitor C1 is grounded. The second comparison module includes a second comparator U2, which is configured to compare the voltage of the first capacitor C1 with the preset reference signal Vref. When the voltage of the first capacitor C1 is greater than or equal to the preset reference signal Vref, the first capacitor C1 is fully charged, the second comparator U2 outputs a high-level signal, the control module 210 outputs a control signal according to the high-level signal output by the second comparator, and the Bluetooth chip 140 starts the function of detecting the working state of the ultra-wideband communication chip 150 according to the received control signal.

[0039] On the basis of the above embodiment, the Bluetooth chip 140 includes a second switch module K2, which is connected to the ultra-wideband communication chip 150 and the control module 210. The second switch module K2 is configured to be turned on or turned off according to the working state of the ultra-wideband communication chip. The control module 210 is further configured to control the second power supply branch 230 to be turned on or turned off according to the signal output by the second switch module K2.

[0040] In the embodiment, the second switch module K2 can be a mechanical switch, a power switch device, etc. When the ultra-wideband communication chip 150 is turned on, the second switch module K2 is closed, the Bluetooth chip 140 outputs an opening signal, the control module 210 controls the first switch module in the second power supply branch 230 to be closed according to the received opening signal, the energy storage module 130 is discharged, and the battery 110 and the energy storage module 130 together supply power to the ultra-wideband communication chip 150. When the ultra-wideband communication chip 150 is not turned on, the second switch module K2 is disconnected, the Bluetooth chip 140 outputs a stop signal, the control module 210 controls the first switch module K1 in the second power supply branch 230 to be disconnected according to the received stop signal, and the voltage conversion module charges the energy storage module 130 according to the current output by the battery, so as to prepare for the discharge required when the ultra-wideband communication chip 150 is turned on. Figure 3 is a waveform diagram of the charging and discharging process of the energy storage module provided in the embodiment of the utility model, as shown in Figure 3 , the discharging time of the first capacitor C1 is 24 ms, the discharging current is greater than 100 mA, the charging and discharging period of the first capacitor C1 is 192 ms, and the charging current is about 2 mA, which can meet the large current demand of the radio frequency working moment.

[0041] With reference to Figure 2 , the remote key further includes a second capacitor C2 and a third capacitor C3, the first end of the second capacitor C2 is connected to the positive pole of the battery 110, the first end of the third capacitor C3 is connected to the power output end OUT, and the second end of the second capacitor C2 and the second end of the third capacitor C3 are grounded. The power management chip 120 further includes a first inductor L1 and inductor connection ends LX1 and LX2, and the first inductor L1 is connected to the voltage conversion module through the inductor connection ends LX1 and LX2. Among them, the second capacitor C2 and the third capacitor C3 are filter capacitors, the second capacitor C2 can filter and process the signal output by the battery, and the third capacitor C3 can filter and process the signal at the power output end. The first inductor L1 has the functions of energy storage and filtering, and the first inductor L1 is connected to the voltage conversion module, which can improve the stability of the signal output by the voltage conversion module.

[0042] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, the steps described in the utility model can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions of the utility model can be achieved, which are not limited herein.

[0043] The specific embodiments described above do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A remote control key, characterized in that, This includes batteries, power management chips, energy storage modules, Bluetooth chips, and ultra-wideband communication chips; The power management chip is electrically connected to the Bluetooth chip, the ultra-wideband communication chip, the energy storage module, and the battery. The power management chip is used to supply power to the Bluetooth chip and the ultra-wideband communication chip according to the signal output by the battery, and to charge the energy storage module. The Bluetooth chip and the ultra-wideband communication chip are connected. The Bluetooth chip is used to detect the working status of the ultra-wideband communication chip and output a status signal. The power management chip is also used to turn on or off the connection between the energy storage module and the ultra-wideband communication chip according to the status signal.

2. The remote control key according to claim 1, characterized in that, The power management chip includes a power input terminal, a power output terminal, an energy storage connection terminal, a communication terminal, a control module, a first power supply branch, and a second power supply branch. The first power supply branch is electrically connected to the power input terminal, the power output terminal, and the energy storage connection terminal, and is used to supply power to the power output terminal and the energy storage connection terminal. The input terminal of the second power supply branch is electrically connected to the energy storage connection terminal, the output terminal of the second power supply branch is electrically connected to the power output terminal, and the control terminal of the second power supply branch is electrically connected to the control module. The control module is used to control the second power supply branch to be turned on or off.

3. The remote control key according to claim 2, characterized in that, The first power supply branch includes a current limiting module and a voltage conversion module. The first end of the current limiting module is connected to the power input terminal, the second end of the current limiting module is connected to the input terminal of the voltage conversion module, the first output terminal of the voltage conversion module is connected to the energy storage connection terminal, and the second output terminal of the voltage conversion module is connected to the power output terminal. The current limiting module is used to limit the current of the signal output by the battery, and the voltage conversion module is used to convert the voltage of the signal output by the current limiting module.

4. The remote control key according to claim 2, characterized in that, The second power supply branch includes a first switch module. The first end of the first switch module is connected to the input end of the second power supply branch, the second end of the first switch module is connected to the output end of the second power supply branch, and the control end of the first switch module is connected to the control end of the second power supply branch. The first switch module is used to turn on or off according to the signal output by the control module.

5. The remote control key according to claim 3, characterized in that, The power management chip further includes a first comparison module. The first input terminal of the first comparison module is connected to the signal of the power input terminal, the second input terminal of the first comparison module is connected to the signal of the power output terminal, and the output terminal of the first comparison module is connected to the control module. The first comparison module is used to compare the signal of the power input terminal and the signal of the power output terminal. The control module is also used to control the voltage conversion module to boost or buck the voltage according to the signal output by the first comparison module.

6. The remote control key according to claim 5, characterized in that, The power management chip further includes a second comparison module. The first input terminal of the second comparison module is connected to the signal of the energy storage connection terminal, the second input terminal of the second comparison module is connected to a preset reference signal, and the output terminal of the second comparison module is connected to the control module. The control module is also used to control the working state of the Bluetooth chip according to the signal output by the second comparison module.

7. The remote control key according to claim 2, characterized in that, The Bluetooth chip includes a second switch module, which is connected to the ultra-wideband communication chip and the control module. The second switch module is used to turn on or off according to the working state of the ultra-wideband communication chip. The control module is also used to control the second power supply branch to turn on or off according to the signal output by the second switch module.

8. The remote control key according to claim 2, characterized in that, The energy storage module includes a first capacitor, with a first end connected to the energy storage connection terminal and a second end grounded.

9. The remote control key according to claim 2, characterized in that, It also includes a second capacitor and a third capacitor. The first terminal of the second capacitor is connected to the positive terminal of the battery, the first terminal of the third capacitor is connected to the power output terminal, and the second terminals of the second capacitor and the second terminal of the third capacitor are grounded.

10. The remote control key according to claim 3, characterized in that, The power management chip also includes a first inductor and an inductor connection terminal, wherein the first inductor is connected to the voltage conversion module through the inductor connection terminal.

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