Battery isolation device, wireless sensor and reader
Patent Information
- Application Number
- CN202521759472.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-18
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-08-18
AI Technical Summary
然而，通过设置隔断片的方式需要在使用之前由人工手动拔出隔断片，增加了安装无线产品的工作量
在需要对无线产品中的电池进行隔离时，将无线产品放置在存在无线能量信号的空间中，以使能量接收电路能够接收到所在空间中的无线能量信号，当能量接收电路接收到无线能量信号时，则能量接收电路根据无线能量信号控制开关电路为断开状态，使得电池的能量不会泄漏或被负载端消耗。而当无线产品投入使用时，则将无线产品从存在无线能量信号的环境中移开，使得开关电路自动闭合，从而使电池的输出端和负载端之间自动连通。如此，实现了电池的隔离，且无需设置绝缘的隔离片，也无需在无线产品使用之前对绝缘片进行拔插，使得无线产品的安装更加方便。
Smart Images
Figure CN224774625U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power isolation technology, specifically to a battery isolation device, a wireless sensor, and a reader / writer. Background Technology
[0002] For wireless products that generate their own power through energy harvesting, such as wireless sensors, they can collect energy in various forms, such as solar energy, vibration, temperature difference, and electromagnetic energy, to power their internal circuits. However, since the continuity and stability of the above energy sources are poor, in order to ensure that the wireless products can operate stably and reliably, batteries are usually built into the wireless products as a supplementary power source.
[0003] Currently, a breakpoint is typically installed between the battery and the circuitry in wireless products. When the wireless product is not in use, an insulating separator is placed at the breakpoint to disconnect the battery and the wireless sensor, preventing battery drain during storage or transportation. However, this method requires manual removal of the separator before use, increasing the workload of installing the wireless product. Utility Model Content
[0004] In view of the shortcomings of the prior art, this application provides a battery isolation device, a wireless sensor and a reader / writer.
[0005] In a first aspect, this application provides a battery isolation device, comprising: A switching circuit is connected in series between the battery's output terminal and the load terminal. An energy receiving circuit, connected to the switching circuit, is used to receive wireless energy signals in its space and control the switching circuit to be in an open state according to the wireless energy signals, so as to control the disconnection of the line between the output terminal of the battery and the load terminal through the switching circuit.
[0006] Optionally, the switching circuit is a normally closed switch. When there is no wireless energy signal in the space where the energy receiving circuit is located, the switching circuit is in a closed state to connect the line between the output terminal of the battery and the load terminal.
[0007] Optionally, the switching circuit includes a switching transistor; The switching transistor includes a first electrode connected to the output terminal of the battery, a second electrode connected to the load terminal, and a control electrode connected to the energy receiving circuit.
[0008] Optionally, the wireless energy signal includes a radio frequency signal, the energy receiving circuit includes a radio frequency identification tag, and the radio frequency identification tag includes a first antenna and a radio frequency identification chip; The first antenna is used to receive radio frequency signals; The radio frequency identification chip is connected to the first antenna and is used to convert the radio frequency signal into a control signal, so as to control the switching circuit to be in an off state through the control signal.
[0009] Optionally, the wireless power signal is output in a periodic manner; the battery isolation device further includes a sustaining circuit. The sustaining circuit is connected to the energy receiving circuit and is used to charge and store energy according to the wireless energy signal during the period of outputting the wireless energy signal, and to discharge during the period of stopping the output of the wireless energy signal, so as to keep the switching circuit in the open state.
[0010] Optionally, the sustaining circuit includes a first resistor and a first capacitor; The first resistor includes a first terminal connected to the energy receiving circuit, the first capacitor, and the switching circuit, and a second terminal grounded. The first capacitor includes a first end connected to the first resistor and a second end grounded.
[0011] Optionally, the battery isolation device is used for isolation between the battery and the load end, and the distance between the battery isolation device and the reader for outputting the wireless energy signal is smaller than the read / write area of the reader.
[0012] Secondly, in one embodiment, this application provides a wireless sensor, a sensor circuit, a battery, and a battery isolation device as described above. The sensor circuit is connected to the switching circuit through the load terminal, and the output terminal of the battery is connected to the switching circuit. The switching circuit controls the disconnection of the line between the sensor circuit and the battery.
[0013] Thirdly, in one embodiment, this application provides a reader / writer that is wirelessly connected to the aforementioned battery isolation device and is used to transmit the wireless energy signal to the space where the battery isolation device is located.
[0014] Optionally, the wireless power signal includes a radio frequency signal, and the reader includes a second antenna and a radio frequency transmitting chip; The radio frequency transmitting chip is used to output radio frequency signals; The second antenna is connected to the radio frequency transmitting chip and is used to transmit the radio frequency signal to the space where the battery isolation device is located, so as to transmit the radio frequency signal to the battery isolation device through spatial coupling.
[0015] Through the above technical solution, this application includes at least the following beneficial technical effects: When battery isolation is required in wireless products, the product is placed in a space containing wireless energy signals. This allows the energy receiving circuit to receive these signals. Upon receiving the signals, the circuit controls a switch to open, preventing battery energy leakage or consumption by the load. When the product is to be used, it is removed from the environment, automatically closing the switch and connecting the battery output to the load. This achieves battery isolation without the need for insulating sheets or the need to manually insert or remove them before use, simplifying installation. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of a battery isolation device in one embodiment of this application; Figure 2 This is a schematic diagram of a sustaining circuit in one embodiment of this application; Figure 3 This is a circuit connection diagram of a battery isolation device in one embodiment of this application; Figure 4 This is a waveform diagram of a wireless power signal in one embodiment of this application; Figure 5 This is a schematic diagram illustrating a reader / writer usage scenario in one embodiment of this application; Figure 6 This is a schematic diagram illustrating the cooperation between the reader / writer and the battery isolation device in one embodiment of this application.
[0018] Explanation of reference numerals in the attached figures: 100, wireless product; 10, battery isolation device; 20, reader / writer; 11, switching circuit; 12, energy receiving circuit; 121, first antenna; 122, radio frequency identification chip; 13, sustaining circuit; 21, second antenna; 22, radio frequency transmitting chip. Detailed Implementation
[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0020] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified. In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use this application. In the following description, details are set forth for illustrative purposes. It should be understood that those skilled in the art will recognize that this application can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid unnecessary detail that would obscure the description of this application. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.
[0021] Firstly, such as Figures 1 to 5 As shown, in one embodiment, this application provides a battery isolation device, which includes a switching circuit 11 and an energy receiving circuit 12. The switching circuit 11 is connected in series between the output terminal and the load terminal of the battery; the energy receiving circuit 12 is connected to the switching circuit 11 and is used to receive wireless energy signals in its location, and control the switching circuit 11 to be in an open state according to the wireless energy signals, so as to control the disconnection of the line between the output terminal and the load terminal of the battery through the switching circuit 11.
[0022] The battery isolation device is built into the wireless product 100, and the load end is also connected to the power circuit in the wireless product 100. For example, when the wireless product 100 is a wireless sensor, the power circuit can be the sensor circuit, and the load end can be used to connect to the sensor circuit in the wireless sensor.
[0023] As an example, the switch circuit 11 can only be in an open state when a wireless energy signal is present in the space where the energy receiving circuit 12 is located; otherwise, the switch circuit 11 will be in a closed state. Therefore, when the battery isolation device is removed from the environment where a wireless energy signal exists, the output terminal of the battery and the load terminal can be automatically connected. Therefore, when battery isolation is required, the wireless product 100 is placed in an environment where a wireless energy signal exists so that the energy receiving circuit 12 can receive the wireless energy signal.
[0024] In the above embodiments, when battery isolation in a wireless product is required, the wireless product is placed in a space containing wireless energy signals so that the energy receiving circuit 12 can receive the wireless energy signals in that space. When the energy receiving circuit 12 receives the wireless energy signals, it controls the switching circuit 11 to be in an open state, preventing battery energy leakage or consumption by the load. When the wireless product 100 is put into use, it is removed from the environment containing wireless energy signals, causing the switching circuit 11 to automatically close, thus automatically connecting the battery output and the load. This achieves battery isolation without the need for an insulating insulating sheet or the need to plug and unplug the insulating sheet before using the wireless product 100, making the installation of the wireless product 100 more convenient.
[0025] Furthermore, if battery isolation is achieved using a separator, metal elastic sheets are typically placed between the battery's output and load ends to create a break. The separator is then inserted between these two sheets, preventing communication between them. However, after the separator is removed, the metal elastic sheets at the output and load ends will move closer together due to elastic potential energy, allowing communication. This leaves the metal elastic sheets at the output and load ends exposed, reducing the sealing performance of the wireless product 100 and decreasing its waterproof and corrosion-resistant properties, ultimately affecting its overall performance. Additionally, the separator can accidentally detach, further compromising battery isolation. In contrast, by using the switching circuit 11 and the energy receiving circuit 12 to isolate the battery from the load, the battery isolation function is integrated into the wireless product 100's circuit board, eliminating exposed break points and improving the sealing performance, waterproofing, and corrosion resistance of the wireless product 100.
[0026] As one implementation of the switching circuit 11, the switching circuit 11 is a normally closed switch. When there is no wireless energy signal in the space where the energy receiving circuit 12 is located, the switching circuit 11 is in a closed state, so that the line between the output terminal of the battery and the load terminal is connected.
[0027] In the above embodiments, the switch circuit 11 adopts a normally closed switch, so that when there is no wireless energy signal in the space where the energy receiving circuit 12 is located, the switch circuit 11 can automatically switch to the closed state, so that no additional control signal is required during the use and installation of the wireless product 100, thereby enabling the battery output terminal and the load terminal to be automatically connected when the energy receiving circuit 12 leaves the environment where there is a wireless energy signal.
[0028] Reference Figure 3 As one embodiment of the switching circuit 11, the switching circuit 11 includes a switching transistor Q1; the switching transistor Q1 includes a first electrode connected to the output terminal of the battery, a second electrode connected to the load terminal, and a control electrode connected to the energy receiving circuit 12.
[0029] Here, VBETTER represents the battery output terminal, and VOUT represents the load terminal.
[0030] As an example, the switching transistor Q1 can be a P-type transistor. When there is no signal input to the control electrode of the switching transistor Q1, the control electrode of the switching transistor Q1 is in a low-level state, making the switching transistor Q1 normally closed. The first electrode of the switching transistor Q1 can be the source, and the second electrode can be the drain.
[0031] Reference Figure 3 As one implementation of the wireless power signal, the wireless power signal includes a radio frequency (RF) signal. The power receiving circuit 12 includes an RFID tag, which includes a first antenna 121 and an RFID chip 122. The first antenna 121 is used to receive the RF signal; the RFID chip 122 is connected to the first antenna 121 and is used to convert the RF signal into a control signal to control the switching circuit 11 to be in an off state.
[0032] As an example, when an RF signal is received, the control signal is high, controlling the switch circuit 11 to be in the open state. When no RF signal is received, the control signal is low, and since the switch circuit 11 is a normally closed switch, it is in the closed state at this time.
[0033] In this system, radio frequency (RF) signals propagate in space in the form of electromagnetic waves, and RFID tags can be passive tags. The first antenna 121 receives the RF signal and uses its energy to activate the RFID chip 122, causing it to start operating and output control signals.
[0034] Reference Figure 2 and Figure 3 In some embodiments, the wireless power signal is output in a periodic manner; the battery isolation device also includes a sustaining circuit 13. The sustaining circuit 13 is connected to the energy receiving circuit 12 and is used to charge and store energy according to the wireless power signal during the period of outputting the wireless power signal, and to discharge during the period of stopping the output of the wireless power signal, so as to keep the switching circuit 11 in the off state.
[0035] Reference Figure 4 As an example, periodic output of the wireless power signal means that the period of outputting the wireless power signal alternates with the period of stopping the output. For example, during period t1, the wireless power signal is output, charging and storing energy in the sustaining circuit 13, while simultaneously controlling the switching circuit 11 to be in the off state. During period t2, the wireless power signal is stopped, the sustaining circuit 13 discharges, and the discharge voltage of the sustaining voltage controls the switching circuit 11 to be in the off state. In this way, by periodically alternating between outputting and stopping the wireless power signal, the switching circuit 11 can be kept in the off state continuously. If the sustaining circuit 13 is not provided, the wireless power signal needs to be continuously output, and if the output of the wireless power signal stops, the switching circuit 11 will immediately be in the off state.
[0036] In the above embodiment, by maintaining the circuit 13 to discharge during the period when the wireless energy signal is stopped, the switching circuit 11 is kept in the off state, so that the wireless energy signal does not need to be continuously output, thereby saving the energy required to output the wireless energy signal.
[0037] Reference Figure 2 and Figure 3 The sustaining circuit 13 includes a first resistor R1 and a first capacitor C1; wherein the first resistor R1 includes a first end connected to the energy receiving circuit 12, the first capacitor C1 and the switching circuit 11 and a second end grounded; the first capacitor C1 includes a first end connected to the first resistor R1 and a second end grounded.
[0038] As an example, the energy receiving circuit 12 receives the wireless energy signal and converts the wireless energy signal into a control signal. The amplitude of the control signal can be 5V. Taking the switch Q1 as a PMOS transistor as an example, the conduction threshold voltage of the switch Q1 can be 3V. The amplitude of the control signal needs to be greater than the conduction threshold voltage of the switch Q1.
[0039] As an example, when the control signal is high, the switch Q1 is turned off according to the control signal, and the first capacitor C1 is charged according to the control signal, so that the voltage of the first capacitor C1 is the same as the amplitude of the control signal. When the control signal is low, the first capacitor C1 begins to discharge. In the initial stage of discharge, the discharge voltage is equal to the amplitude of the control signal. As the first capacitor C1 discharges, the discharge voltage gradually decreases. If the discharge voltage is less than the turn-on threshold voltage of the switch Q1, then the switch Q1 is closed.
[0040] To keep switch Q1 off and prevent it from closing due to a drop in discharge voltage to its turn-on threshold voltage, the output period of the wireless energy signal can be set based on the discharge curve of the first capacitor C1. If the discharge voltage of the first capacitor C1 is less than the turn-on threshold voltage of switch Q1, switch Q1 closes. The discharge duration of the first capacitor C1 can be calculated based on the difference between its initial discharge voltage and the turn-on threshold voltage. Within this discharge duration, switch Q1 remains off even if the wireless energy signal output stops. Thus, the period for stopping the wireless energy signal output can be determined based on the discharge duration. Furthermore, the period for outputting the wireless energy signal can be determined based on the charging curve of the first capacitor C1, ensuring that the first capacitor C1 charges to the amplitude of the control signal. Figure 4 t1 represents the period of outputting the wireless energy signal, for example, t1 can be 1-2 seconds; t2 represents the period of stopping the output of the wireless energy signal, for example, t2 can be 0.5-1 seconds.
[0041] Reference Figure 5 The battery isolation device is used for isolation between the battery and the load end. The distance between the battery isolation device and the reader 20 used to output wireless energy signals is smaller than the reading and writing area of the reader 20.
[0042] The read / write area of the reader 20 refers to the area covered by the wireless energy signal output by the reader 20. Within the read / write area, the energy receiving circuit 12 can receive the wireless energy signal. When the energy receiving circuit 12 exceeds the read / write area of the reader 20, the energy receiving circuit 12 cannot receive the wireless energy signal, and at this time, the switch circuit 11 is in the closed state.
[0043] As an example, the reader 20 is used to be placed in a space where the wireless product 100 requires battery isolation. The reader 20 outputs a wireless energy signal to isolate the battery of the wireless product 100 within its reading / writing area, thus disconnecting the line between the battery's output and the load. For example, if the wireless product 100 is stored in a warehouse or transported by a transport vehicle, the reader 20 can be placed in the warehouse or transport vehicle to prevent the wireless product 100 from consuming battery energy during storage and operation.
[0044] Reference Figure 5 Multiple wireless products 100 can be placed in the read / write area of a reader 20. The energy receiving circuit 12 of each wireless product 100 receives the wireless energy signal in the read / write area, thereby disconnecting the output terminal of the battery in each wireless product 100 from the load terminal.
[0045] Secondly, in one embodiment, this application provides a wireless sensor, a sensor circuit, a battery, and a battery isolation device as described above; the sensor circuit is connected to a switch circuit 11 via a load terminal, and the output terminal of the battery is connected to the switch circuit 11, and the switch circuit 11 controls the disconnection of the line between the sensor circuit and the battery.
[0046] Thirdly, in one embodiment, this application provides a reader / writer 20 that is wirelessly connected to the aforementioned battery isolation device 10 and is used to transmit wireless energy signals to the space where the battery isolation device 10 is located.
[0047] Reference Figure 6 In some embodiments, the wireless power signal includes a radio frequency (RF) signal. The reader 20 includes a second antenna 21 and an RF transmitter chip 22. The RF transmitter chip 22 is used to output the RF signal. The second antenna 21 is connected to the RF transmitter chip 22 and is used to transmit the RF signal to the space where the battery isolation device 10 is located, so as to transmit the RF signal to the battery isolation device 10 through spatial coupling.
[0048] Spatial coupling refers to the phenomenon of signal transmission between the reader 20 and the RFID tag in the battery isolation device 10 through the action of an electromagnetic field in physical space. The second antenna 21 of the reader 20 transmits radio frequency signals of an alternating electromagnetic field. The first antenna 121, which is located in the electromagnetic field space and is connected to the RFID chip 122, generates current due to electromagnetic induction, thereby realizing the transfer of energy from the reader 20 to the RFID tag.
[0049] In the above embodiment, the radio frequency transmitting chip 22 outputs a radio frequency signal and transmits the radio frequency signal to the space where the battery isolation device 10 is located through the second antenna 21. The radio frequency signal is transmitted to the energy receiving circuit 12 in the battery isolation device 10 through spatial coupling, thereby realizing the isolation control of the battery.
[0050] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0051] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.
[0052] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the technical solution of this application shall still fall within the scope of the technical solution of this application.
Claims
1. A battery isolation device, characterized by, include: A switching circuit is connected in series between the battery's output terminal and the load terminal. An energy receiving circuit, connected to the switching circuit, is used to receive wireless energy signals in its space and control the switching circuit to be in an open state according to the wireless energy signals, so as to control the disconnection of the line between the output terminal of the battery and the load terminal through the switching circuit.
2. The battery isolation apparatus of claim 1, wherein, The switching circuit is a normally closed switch. When there is no wireless energy signal in the space where the energy receiving circuit is located, the switching circuit is in a closed state, so that the line between the output terminal of the battery and the load terminal is connected.
3. The battery isolation apparatus of claim 1, wherein, The switching circuit includes a switching transistor; The switching transistor includes a first electrode connected to the output terminal of the battery, a second electrode connected to the load terminal, and a control electrode connected to the energy receiving circuit.
4. The battery isolation apparatus of claim 1, wherein, The wireless energy signal includes a radio frequency signal, and the energy receiving circuit includes a radio frequency identification tag, the radio frequency identification tag including a first antenna and a radio frequency identification chip; The first antenna is used to receive radio frequency signals; The radio frequency identification chip is connected to the first antenna and is used to convert the radio frequency signal into a control signal, so as to control the switching circuit to be in an off state through the control signal.
5. The battery isolation apparatus of claim 3, wherein, The wireless power signal is output in a periodic manner; the battery isolation device also includes a sustaining circuit. The sustaining circuit is connected to the energy receiving circuit and is used to charge and store energy according to the wireless energy signal during the period of outputting the wireless energy signal, and to discharge during the period of stopping the output of the wireless energy signal, so as to keep the switching circuit in the off state.
6. The battery isolation apparatus of claim 5, wherein, The sustaining circuit includes a first resistor and a first capacitor; The first resistor includes a first terminal connected to the energy receiving circuit, the first capacitor, and the switching circuit, and a second terminal grounded. The first capacitor includes a first end connected to the first resistor and a second end grounded.
7. The battery isolation apparatus of claim 6, wherein, The battery isolation device is used for isolation between the battery and the load end, and the distance between the battery isolation device and the reader for outputting the wireless energy signal is smaller than the read / write area of the reader.
8. A wireless sensor, characterized by Includes sensor circuitry, a battery, and a battery isolation device as described in any one of claims 1 to 7; The sensor circuit is connected to the switching circuit through the load terminal, and the output terminal of the battery is connected to the switching circuit. The switching circuit controls the disconnection of the line between the sensor circuit and the battery.
9. A reader / writer characterized by comprising: The reader is wirelessly connected to the battery isolation device as described in any one of claims 1 to 7, and is used to transmit the wireless energy signal to the space where the battery isolation device is located.
10. The read-write device of claim 9, wherein, The wireless energy signal includes a radio frequency signal, and the reader includes a second antenna and a radio frequency transmitting chip; The radio frequency transmitting chip is used to output radio frequency signals; The second antenna is connected to the radio frequency transmitting chip and is used to transmit the radio frequency signal to the space where the battery isolation device is located, so as to transmit the radio frequency signal to the battery isolation device through spatial coupling.