Internal and external battery switching device and thermal imaging telescope

Abstract

The invention relates to an internal and external battery switching device and a thermal imaging telescope, and the device is connected with a detachable external battery through a voltage monitoring module, samples and judges the voltage of the external battery, and outputs a first switching signal under the condition that the voltage of the external battery is lower than a threshold value; the two-way intelligent switching module is connected with the voltage monitoring module, the built-in battery and the load and is used for switching the built-in battery to supply power to the load according to the received first switching signal, so that the problem of poor switching reliability of the internal and external batteries based on software control is solved, rapid switching of the internal and external batteries is realized, and the switching reliability of the internal and external batteries is improved. And the switching stability is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an internal and external battery switching device and a thermal imaging telescope. Background Art

[0002] Electronic products that use lithium batteries have limited power capacity and cannot be used for long periods of time. To extend the device's battery life while reducing power consumption, the capacity and number of batteries are usually increased. For example, electronic devices such as telescopes may have both internal and external batteries. The internal battery is pre-installed by the manufacturer and can be charged, making it a non-removable product. The external battery is an additional battery compartment reserved by the manufacturer for the user, allowing the user to use their own battery. During use, the user's external battery is usually used as power supply. When the user's external battery is exhausted, the device switches to the built-in battery for power, extending the device's operating time.

[0003] However, some existing internal / external battery switching solutions rely on sensors to capture power information and send it to a processing platform. Software then dynamically controls the MOSFET switches to achieve this switching. This puts a strain on system stability and processing speed. If the process isn't handled promptly, the battery switch often fails to complete, leading to abnormal device shutdowns. This is especially true when an electronic product is impacted, where the external battery is almost completely disconnected from the system. System software is unable to immediately switch to the internal battery, and sudden insertion or removal of the external battery can lead to incomplete switching and system power outages.

[0004] With regard to the problem of poor reliability of switching between internal and external batteries in related technologies, no effective solution has been proposed so far. Summary of the Invention

[0005] In this embodiment, an internal / external battery switching device and a thermal imaging telescope are provided to solve the problem of poor reliability of internal / external battery switching in the related art.

[0006] In a first aspect, an internal / external battery switching device is provided in this embodiment, the internal / external battery switching device comprising: an internal battery, a voltage monitoring module, and a dual-path intelligent switching module;

[0007] The voltage monitoring module is connected to the detachable external battery, and is used to sample and determine the voltage of the external battery, and output a first switching signal when the voltage of the external battery is lower than a threshold;

[0008] The dual-channel intelligent switching module is connected to the voltage monitoring module, the external battery, the built-in battery and the load respectively, and is used to switch to the built-in battery to power the load according to the received first switching signal.

[0009] In some of these embodiments, the voltage monitoring module includes: a comparison chip, a first transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, and a first capacitor;

[0010] The input end of the comparison chip is connected to the external battery, and is used to collect and determine whether the voltage of the external battery is lower than a threshold; the output end of the comparison chip is connected to the first end of the first transistor;

[0011] The first end of the first transistor is also grounded through the parallel-connected first resistor and first capacitor; the first end of the first transistor is also connected to the positive pole of the external battery through the second resistor;

[0012] The second end of the first transistor is connected to the positive pole of the external battery through the third resistor, and the second end of the first transistor is also connected to the dual-channel intelligent switching module through the fourth resistor;

[0013] The third end of the first transistor is grounded.

[0014] In some of these embodiments, the internal and external battery switching device further includes: a system control module;

[0015] The system control module is connected to the dual-channel intelligent switching module, and is used to generate a second switching signal according to the received forced switching signal;

[0016] The second switching signal is used to control the dual-channel intelligent switching module to switch to the internal battery to supply power to the load.

[0017] In some of these embodiments, the system control module includes: a second transistor, a fifth resistor, and a sixth resistor;

[0018] The first end of the second transistor is used to receive the forced switching signal;

[0019] The second end of the second transistor is connected to one end of the fifth resistor and one end of the sixth resistor; the other end of the fifth resistor is connected to the internal battery; the other end of the sixth resistor is connected to the dual-channel intelligent switching module;

[0020] The third end of the second transistor is grounded.

[0021] In some of these embodiments, the internal and external battery switching device further includes: a first battery reverse connection prevention module;

[0022] The external battery is connected to the voltage monitoring module through the first battery reverse connection prevention module;

[0023] The first battery reverse connection prevention module is also connected to the dual-path intelligent switching module, and is configured to block the current output of the external battery when the external battery is reversely connected, and conduct the current of the external battery when the external battery is correctly connected.

[0024] In some embodiments, the first battery reverse connection prevention module includes: a third transistor, a fourth transistor, and a seventh resistor;

[0025] The first end of the third transistor is connected to the external battery; the second end of the third transistor is connected to the voltage monitoring module and the dual-path intelligent switching module; the third end of the third transistor is connected to the first end of the fourth transistor;

[0026] The first end of the fourth transistor is further connected to the second end of the third transistor through the seventh resistor; the second end of the fourth transistor is connected to the first end of the third transistor, and the third end of the fourth transistor is grounded.

[0027] In some embodiments, the internal and external battery switching device further includes: a current sampling module;

[0028] The first battery reverse connection prevention module is connected to the voltage monitoring module through the current sampling module;

[0029] The current sampling module is also connected to the dual-path intelligent switching module, and is configured to collect the current of the external battery to determine whether the external battery is successfully switched.

[0030] In some embodiments, the internal and external battery switching device further includes: a charging management module;

[0031] The internal battery is connected to the dual-path intelligent switching module through the charging management module;

[0032] The charging management module is also connected to an external power supply, and is configured to charge the internal battery through the external power supply and protect the internal battery when the internal battery is working.

[0033] In some embodiments, the internal and external battery switching device further includes: a second battery reverse connection prevention module;

[0034] The internal battery is connected to the charging management module through the second battery reverse connection prevention module;

[0035] The second battery reverse connection prevention module is configured to block the current output of the internal battery when the internal battery is reversely connected, and conduct the current of the external battery when the internal battery is correctly connected.

[0036] Second aspect, in this embodiment, a thermal imaging telescope is provided, and the thermal imaging telescope includes the internal and external battery switching device according to any one of the first aspect.

[0037] Compared with the related art, the internal and external battery switching device and the thermal imaging telescope provided in this embodiment are connected to the detachable external battery through the voltage monitoring module, sample and judge the voltage of the external battery, and output a first switching signal when the voltage of the external battery is lower than the threshold; through the dual-channel intelligent switching module, which is respectively connected to the voltage monitoring module, the internal battery and the load, and is used to switch to the internal battery to supply power to the load according to the received first switching signal, solving the problem of poor reliability of the internal and external battery switching based on software control, realizing the rapid switching of the internal and external batteries, and improving the stability of the switching.

[0038] Details of one or more embodiments of the present application are set forth in the following drawings and description, so that other features, objects, and advantages of the present application will become more concise and understandable. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0040] Figure 1 is a structural block diagram of the internal and external battery switching device in an embodiment of the present application;

[0041] Figure 2 is a circuit diagram of the dual-channel intelligent switching module in an embodiment of the present application;

[0042] Figure 3 is a circuit diagram of the voltage monitoring module in an embodiment of the present application;

[0043] Figure 4 is a structural block diagram of the internal and external battery switching device in another embodiment of the present application;

[0044] Figure 5 is a circuit diagram of the system control module in an embodiment of the present application;

[0045] Figure 6 is a structural block diagram of the internal and external battery switching device in another embodiment of the present application;

[0046] Figure 7 is a circuit diagram of the first battery reverse connection prevention module in an embodiment of the present application;

[0047] Figure 8 is a structural block diagram of the internal and external battery switching device in a preferred embodiment of the present application.

[0048] Reference numerals: 100, internal and external battery switching device; 110, internal battery; 120, voltage monitoring module; 130, dual-channel intelligent switching module; 140, system control module; 150, first battery reverse connection prevention module; 160, current sampling module; 170, charging management module; 180, second battery reverse connection prevention module; 200, external battery. Detailed implementation manners

[0049] For a clearer understanding of the purpose, technical solutions and advantages of this application, the following describes and explains this application in combination with the accompanying drawings and embodiments.

[0050] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meanings understood by those with ordinary skills in the technical field to which this application belongs. In this application, words such as "a", "one", "kind", "the", "these", etc. do not indicate a limitation in quantity, and they can be singular or plural. The terms "including", "comprising", "having" and any variants thereof involved in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product or device including a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent in these processes, methods, products or devices. The terms "connected", "coupled", etc. involved in this application do not limit to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "plurality" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. Usually, the character " / " indicates that the objects associated before and after are an "or" relationship. The terms "first", "second", "third", etc. involved in this application only distinguish similar objects and do not represent a specific sorting for the objects.

[0051] In this embodiment, an internal / external battery switching device 100 is provided, which can be used in electronic products such as telescopes and cameras. Such electronic products generally have high requirements for battery life. Therefore, in addition to the built-in battery 110 provided by the electronic product, an external battery 200 interface is also provided. The external battery 200 can be installed and removed by the user. The external battery 200 can be rechargeable or non-rechargeable, and the size of the external battery 200 matches the size of the battery compartment. When in use, the electronic product preferentially uses the user's external battery 200 for power. When the external battery 200 is exhausted, it switches to the device's built-in battery 110 for power, thereby increasing the device's usage time. Because the existing solution of switching batteries by detecting the power level of the external battery 200 and dynamically controlling the MOS tube switch by software is prone to switching failure or untimely problems, resulting in abnormal system shutdown, this embodiment provides a fast switching solution for the internal / external battery 200 to improve the speed and reliability of the switching between the internal and external batteries 200.

[0052] Figure 1 1 is a structural diagram of an internal / external battery switching device 100 in an embodiment. The internal / external battery switching device 100 includes: a built-in battery 110 , a voltage monitoring module 120 and a dual-path intelligent switching module 130 .

[0053] The voltage monitoring module 120 is connected to the detachable external battery 200 and is used to sample and determine the voltage of the external battery 200 and output a first switching signal when the voltage of the external battery 200 is lower than a threshold.

[0054] Specifically, the voltage monitoring module 120 can be directly connected to the external battery 200, or indirectly connected to the external battery 200 through other auxiliary circuits. Other auxiliary circuits include, but are not limited to, current detection, battery reverse protection, or step-down conversion circuits. These circuits can be configured according to actual needs and are not limited in this embodiment. When powered by the external battery 200, if the voltage of the external battery 200 suddenly reaches zero or drops below a set threshold, the voltage monitoring module 120 notifies the dual-channel intelligent switching module 130 to switch batteries by sending a first switching signal.

[0055] The dual-channel intelligent switching module 130 is connected to the voltage monitoring module 120, the external battery 200, the internal battery 110 and the load respectively, and is used to receive a first switching signal from the voltage monitoring module 120, and switch to the internal battery 110 to power the load according to the first switching signal.

[0056] Specifically, the dual-channel intelligent switching module 130 is mainly used for the rapid switching between the built-in battery 200 and the external battery. It has two inputs and one output, and can connect the load to the built-in battery 110 or the external battery 200 according to specific situations. When one of the switches of the built-in battery 110 or the external battery 200 is turned on, the current will not flow to the other path, which has the advantage of preventing reverse current. In addition, compared with the combining circuit built by ordinary diodes, the voltage drop of the dual-channel intelligent switching module 130 can be ignored, reducing losses, and it has a rapid response and can complete rapid switching. In one embodiment, see Figure 2 , the dual-channel intelligent switching module 130 includes a switching chip U3, a resistor R30, and a resistor R35. The first input port IN1 of the switching chip U3 is connected to the built-in battery 110, and Internal_BAT represents the output terminal of the built-in battery; the second input port IN2 of the switching chip U3 is connected to the external battery 200, and External_BAT01 represents the output terminal of the external battery; the first input enable terminal EN1 and the second input enable terminal nEN2 of the switching chip U3 are connected to the voltage monitoring module 120. When the voltage monitoring module 120 outputs a low level, that is, the first switching signal, the first input enable terminal EN1 responds to the received low-level signal, and the circuit between the first input port IN1 and the first output port OUT1 is turned on, and the circuit between the second input port IN2 and the second output port OUT2 is turned off. At this time, the built-in battery 110 supplies power to the load, and VBAT_ALL represents the input terminal of the load; when the voltage monitoring module 120 outputs a high level, that is, a non-first switching signal, the second input enable terminal nEN2 responds to the high-level signal, and the circuit between the second input port IN2 and the second output port OUT2 is turned on, and the circuit between the first input port IN1 and the first output port OUT1 is turned off. At this time, the external battery 200 supplies power to the load. The circuit between the first input port IN1 and the first output port OUT1, and the circuit between the second input port IN2 and the second output port OUT2 are equivalent to ideal diodes, having unidirectionality, low loss, and rapid response.

[0057] In some of these embodiments, see Figure 3 , the voltage monitoring module 120 includes: a comparison chip U4, a first transistor M5, a first resistor R34, a second resistor R27, a third resistor R25, a fourth resistor R28, and a first capacitor C30.

[0058] The input terminal of the comparison chip U4 is connected to the external battery 200, and is used to collect and judge whether the voltage of the external battery 200 is lower than the threshold; the output terminal of the comparison chip U4 is connected to the first end of the first transistor M5.

[0059] The first end of the first transistor M5 is also grounded through a parallel-connected first resistor R34 and first capacitor C30; the first end of the first transistor M5 is also connected to the positive electrode of the external battery 200 through a second resistor R27. The second end of the first transistor M5 is connected to the positive electrode of the external battery 200 through a third resistor R25, and the second end of the first transistor M5 is also connected to the dual-channel intelligent switching module 130 through a fourth resistor R28. The third end of the first transistor M5 is grounded.

[0060] Specifically, referring to Figure 3 , the first input terminal VCC of the comparison chip U4 is connected to the positive electrode of the external battery 200 through a resistor R26; the second input terminal GND of the comparison chip U4 is connected to the negative electrode of the external battery 200; a capacitor C43 is also connected between the first input terminal VCC and the second input terminal GND of the comparison chip U4. The built-in threshold Vth of the comparison chip U4 is 2.8V. When the voltage across the external battery 200 is lower than 2.8V, the output terminal of the comparison chip U4 outputs a high-level signal to the first end of the first transistor M5 to control the first transistor M5 to conduct. When the first transistor M5 conducts, the second end of the first transistor M5 is pulled low. The second end of the first transistor M5 is connected to one end of the fourth resistor, and the other end of the fourth resistor serves as the output terminal of the voltage monitoring module 120, outputting the first switching signal QieHuan_EN.

[0061] In this embodiment, the voltage of the external battery 200 is detected through the hardware circuit structure, and the dual-channel intelligent switching module 130 is controlled to perform battery switching, improving the reliability and accuracy of the abnormal judgment of the external battery 200.

[0062] In some of these embodiments, referring to Figure 4 , the internal and external battery switching device 100 further includes: a system control module 140.

[0063] The system control module 140 is connected to the dual-channel intelligent switching module 130 and is used to generate a second switching signal according to the received forced switching signal. The second switching signal is used to control the dual-channel intelligent switching module 130 to switch to the internal battery to supply power to the load.

[0064] Specifically, when the voltage of the external battery 200 is higher than or equal to the threshold, the voltage monitoring module 120 outputs a non-first switching signal. At this time, the dual-channel intelligent switching module 130 maintains the power supply of the external battery 200. To enable users to flexibly configure the use of the internal and external batteries 200, a system control module 140 is set. When the external battery 200 is supplying power, the system control module 140 controls the dual-channel intelligent switching module 130 to perform power supply switching with a higher priority, that is, to switch to the internal battery 110 for power supply. For example, when a high-power function needs to be used currently, the user can send a forced switching signal through the system controller to manually switch to use the internal battery 110.

[0065] In some of these embodiments, refer to Figure 5 , the system control module 140 includes: a second transistor M6, a fifth resistor R29, and a sixth resistor R31. The first end of the second transistor M6 is used to receive the forced switching signal SOC_EN; the second end of the second transistor M6 is connected to one end of the fifth resistor R29 and one end of the sixth resistor R31; the other end of the fifth resistor R29 is connected to the internal battery 110; the other end of the sixth resistor R31 is connected to the dual-channel intelligent switching module 130; the third end of the second transistor M6 is grounded.

[0066] Specifically, when the first end of the second transistor M6 receives the forced switching signal SOC_EN, the second transistor M6 conducts, and the second end of the second transistor M6 is pulled low, and a second switching signal QieHuan_EN is output at the other end of the sixth resistor R31. The second switching signal QieHuan_EN is at a low level, which can preferentially control the dual-channel intelligent switching module 130 to switch from the external battery 200 for power supply to the internal battery 110 for power supply.

[0067] In this embodiment, through the switching circuit formed by the second transistor M6, the system's control switching signal can be quickly responded to, and the flexible control of the internal battery 110 can be realized.

[0068] In some of these embodiments, refer to Figure 6 , the internal and external battery switching device 100 further includes: a first battery reverse connection prevention module 150. The external battery 200 is connected to the voltage monitoring module 120 through the first battery reverse connection prevention module 150; the first battery reverse connection prevention module 150 is also connected to the dual-channel intelligent switching module 130, and is used to prevent the current output of the external battery 200 in the case of reverse connection of the external battery 200, and conduct the current of the external battery 200 when the external battery 200 is correctly connected.

[0069] In this embodiment, through the first battery reverse connection prevention module 150, it is possible to prevent the user from reversing the positive and negative poles of the external battery 200 when replacing the battery, resulting in damage to the components in the system and improving the circuit stability.

[0070] In some of these embodiments, referring to Figure 7 , the first battery reverse connection prevention module 150 includes: a third transistor M1, a fourth transistor M4, and a seventh resistor R1. The first end of the third transistor M1 is connected to the external battery 200; the second end of the third transistor M1 is connected to the voltage monitoring module 120 and the dual-channel intelligent switching module 130; the third end of the third transistor M1 is connected to the first end of the fourth transistor M4; the second end of the fourth transistor M4 is connected to the first end of the third transistor M1, and the third end of the fourth transistor M4 is grounded.

[0071] Specifically, when the external battery 200 is correctly connected, that is, the positive electrode External_BAT_IN of the external battery 200 is connected to the first end of the third transistor M1, the fourth transistor M4 is turned on, thereby controlling the third transistor M1 to be turned on, and power is supplied to other circuits through the output terminal External_BAT. When the external battery 200 is reversely connected, that is, the negative electrode of the external battery 200 is connected to the first end of the third transistor M1, the fourth transistor M4 is turned off, thereby controlling the third transistor M1 to be turned off, avoiding the reversely connected external battery 200 from supplying power to other circuits and causing circuit damage. Moreover, the first battery reverse connection prevention module 150 of this embodiment is effective whether the electronic device is turned on or off. Even when the electronic device is powered on through the built-in battery 110 or the USB interface of the system, at this time, the third end of the third transistor M1 is energized, but since the second end of the third transistor M1 is also connected to the turned-off fourth transistor M4, there is no voltage difference between the third end of the third transistor M1 and the second end of the third transistor M1. As long as the fourth transistor M4 is not turned on, the third transistor M1 can never be turned on, solving the problem that the battery cannot be prevented from being reversely connected after the electronic device is turned on and further protecting the circuit.

[0072] Furthermore, referring to Figure 7 , the first battery reverse connection prevention module 150 further includes a transient suppression diode D1, a capacitor C1, a capacitor C10, a resistor R4, a resistor R1, a capacitor C2, and a capacitor C3. The first end of the third transistor M1 is also grounded through the transient suppression diode D1; the first end of the third transistor M1 is also grounded through the capacitor C1. The second end of the fourth transistor M4 is also grounded through the parallel-connected capacitor C10 and resistor R4. The first end of the fourth transistor M4 is also connected to the second end of the third transistor M1 through the resistor R1. The second end of the third transistor M1 is also grounded through the parallel-connected capacitor C2 and capacitor C3.

[0073] In some of these embodiments, referring to Figure 8, the internal and external battery switching device 100 further includes: a current sampling module 160. The first battery reverse connection prevention module 150 is connected to the voltage monitoring module 120 through the current sampling module 160; the current sampling module 160 is also connected to the dual-channel intelligent switching module 130, and is used to collect the current of the external battery to determine whether the external battery is successfully switched.

[0074] Specifically, the external battery 200, the first battery reverse connection prevention module 150, and the current sampling module 160 are connected in series in sequence. After the voltage of the external battery 200 is output from the current sampling module 160, it is respectively connected to the voltage monitoring module 120 and the dual-channel intelligent switching module 130 to supply power to the voltage monitoring module 120 and the dual-channel intelligent switching module 130. The current sampling module 160 is also connected to the system controller. The current sampling module 160 can collect the current of the external battery 200. When the external battery 200 is loaded, the current sampling module 160 samples a large current and informs the system controller that the current has been successfully switched to the external battery 200. When the current data sampled by the current sampling module 160 is zero or very small, it informs the system controller that the current external battery 200 is not powered, realizing real-time monitoring of battery switching.

[0075] In some of the embodiments, refer to Figure 8 , the internal and external battery switching device 100 further includes: a charging management module 170. The built-in battery 110 is connected to the dual-channel intelligent switching module 130 through the charging management module 170. The charging management module 170 is also connected to an external power supply, and is used to charge the built-in battery 110 through the external power supply and protect the built-in battery 110 when the built-in battery 110 is working.

[0076] Specifically, the charging management module 170 uses a charging management chip to manage the charging of the built-in battery 110. When the external battery 200 interface is not connected to the external battery 200, the built-in battery 110 is used for power supply. When the power of the built-in battery 110 is exhausted, the built-in battery 110 can be charged through the charging management module 170 for repeated use. And the charging management module 170 plays roles of overcharge protection, overvoltage protection, overtemperature protection, and short-circuit protection for the built-in battery 110.

[0077] In some of the embodiments, refer to Figure 8 , the internal and external battery switching device 100 further includes: a second battery reverse connection prevention module 180. The built-in battery 110 is connected to the charging management module 170 through the second battery reverse connection prevention module 180; the second battery reverse connection prevention module 180 is used to prevent the current output of the built-in battery 110 in the case of reverse connection of the built-in battery 110, and conduct the current of the external battery 200 when the built-in battery 110 is correctly connected.

[0078] Specifically, the built-in battery 110, the second battery reverse connection prevention module 180, and the charging management module 170 are connected in series in sequence. The voltage provided by the built-in battery 110 is connected to the dual-path intelligent switching module through the charging management module 170. Among them, the second battery reverse connection prevention module 180 is a protection circuit based on MOS transistors to prevent battery reverse connection damage. When the battery is reversely connected, the output is cut off, and when the battery is correctly connected, the output is conducted. The second battery reverse connection prevention module 180 can adopt the same structure as the first battery reverse connection prevention module 150.

[0079] In this embodiment, a thermal imaging telescope is further provided. The thermal imaging telescope includes the internal and external battery switching device 100 in any of the above embodiments.

[0080] In this embodiment, the thermal imaging telescope samples and judges the voltage of the external battery 200 through the voltage monitoring module 120, and outputs a first switching signal when the voltage of the external battery 200 is lower than the threshold. The dual-path intelligent switching module 130 switches to the built-in battery 110 to supply power to the load according to the received first switching signal, solving the problem of poor reliability of the internal and external battery 200 switching based on software control, realizing the rapid switching of the internal and external batteries 200, and improving the power supply stability of the thermal imaging telescope.

[0081] The following describes and illustrates this embodiment through preferred embodiments.

[0082] Figure 8 It is a schematic diagram of the internal and external battery switching device 100 of this preferred embodiment. As Figure 8 shown, the internal and external battery switching device 100 includes: a built-in battery 110, a second battery reverse connection prevention module 180, a charging management module 170, a first battery reverse connection prevention module 150, a current sampling module 160, a voltage monitoring module 120, a dual-path intelligent switching module 130, and a system control module 140.

[0083] The built-in battery 110, the second battery reverse connection prevention module 180, and the charging management module 170 are connected in series in sequence. The charging management module 170 is also connected to the dual-path intelligent switching module 130 and an external power supply. Among them, the second battery reverse connection prevention module 180 is used to prevent the current output of the built-in battery 110 when the built-in battery 110 is reversely connected, and conduct the current of the external battery 200 when the built-in battery 110 is correctly connected; the charging management module 170 is used to charge the built-in battery 110 through the external power supply and protect the built-in battery 110 when the built-in battery 110 is working.

[0084] The detachable external battery 200, the first battery reverse connection prevention module 150, the current sampling module 160, the voltage monitoring module 120, and the dual-path intelligent switching module 130 are connected in series in sequence. The current sampling module 160 is also connected to the dual-path intelligent switching module 130. Among them, the first battery reverse connection prevention module 150 is used to block the current output of the external battery 200 when the external battery 200 is reversely connected, and conduct the current of the external battery 200 when the external battery 200 is correctly connected; the current sampling module 160 is used to collect the current of the external battery to determine whether the external battery is successfully switched; the voltage monitoring module 120 is used to sample and judge the voltage of the external battery 200, and output a first switching signal when the voltage of the external battery 200 is lower than the threshold value.

[0085] The system control module 140 is connected to the dual-path intelligent switching module 130, and is used to generate a second switching signal according to the received forced switching signal.

[0086] The dual-path intelligent switching module 130 is used to switch to the built-in battery 110 to supply power to the load according to the received first switching signal, or switch to the built-in battery 110 to supply power to the load according to the received second switching signal. Specifically, when the external battery 200 supplies power to the load through the dual-path intelligent switching module 130, the voltage monitoring module 120 monitors the supply voltage of the external battery 200, and outputs a low-level control signal, that is, the first switching signal, when it detects that the voltage of the external battery 200 is lower than the threshold value, so as to inform the dual-path intelligent switching module 130 to perform battery switching; similarly, when the external battery 200 supplies power to the load through the dual-path intelligent switching module 130, when it is detected that the voltage of the external battery 200 is not lower than the threshold value, the user can choose to trigger the forced switching signal, and the control system control module 140 generates a low-level control signal, the second switching signal, so as to inform the dual-path intelligent switching module 130 to perform battery switching. The enable terminal of the dual-path intelligent switching module 130 is effective at low level. When the first switching signal or the second switching signal is at low level, it immediately switches to the built-in battery 110 for power supply. The dual-path intelligent switching module 130 is built with digital logic devices inside, and the response time is within 10 ns to handle the fast switching logic.

[0087] In this preferred embodiment, the fast switching of the internal and external batteries is realized mainly by means of a hardware circuit, avoiding the problems of battery switching failure or untimely switching in the software operation scheme, which may lead to abnormal shutdown of the system. At the same time, it is used to improve the risk of system impact power-off, and reduce the abnormal shutdown phenomenon caused by the system being unable to immediately switch the power supply due to the occurrence of impact events when using the external battery 200, protecting the stability of the system.

[0088] It should be understood that the specific embodiments described herein are for the purpose of explaining this application and not for limiting it. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided in this application without creative efforts shall fall within the protection scope of this application.

[0089] Obviously, the accompanying drawings are only some examples or embodiments of this application. For those of ordinary skill in the art, this application can also be applied to other similar situations based on these drawings without creative efforts. Additionally, it can be understood that although the work done during the development here may be complex and time-consuming, for those of ordinary skill in the art, certain design, manufacturing, or production changes based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient disclosure of this application.

[0090] The term "embodiment" in this application means that the specific features, structures, or characteristics described in combination with the embodiment can be included in at least one embodiment of this application. The phrase appears in various positions in the specification and does not necessarily mean the same embodiment, nor does it mean being independent or alternative to other embodiments and mutually exclusive. Those of ordinary skill in the art can clearly or implicitly understand that the embodiments described in this application can be combined with other embodiments without conflict.

[0091] The above-described embodiments only represent several implementation manners of this application. Their descriptions are relatively specific and detailed, but should not be construed as a limitation on the scope of patent protection. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the protection scope of this application shall be subject to the appended claims.

Claims

1. An internal and external battery switching device, characterized in that The internal and external battery switching device includes: an internal battery, a voltage monitoring module, and a dual-channel intelligent switching module; The voltage monitoring module is connected to the detachable external battery, and is used for sampling and judging the voltage of the external battery, and outputting a first switching signal when the voltage of the external battery is lower than a threshold value; The dual-channel intelligent switching module is respectively connected to the voltage monitoring module, the external battery, the internal battery, and the load, and is used for switching to the internal battery to supply power to the load according to the received first switching signal.

2. The internal and external battery switching device according to claim 1, wherein The voltage monitoring module includes: a comparison chip, a first transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, and a first capacitor; The input end of the comparison chip is connected to the external battery, and is used for collecting and judging whether the voltage of the external battery is lower than a threshold value; the output end of the comparison chip is connected to the first end of the first transistor; The first end of the first transistor is also grounded through the parallel-connected first resistor and first capacitor; the first end of the first transistor is also connected to the positive pole of the external battery through the second resistor; The second end of the first transistor is connected to the positive pole of the external battery through the third resistor, and the second end of the first transistor is also connected to the dual-channel intelligent switching module through the fourth resistor; The third end of the first transistor is grounded.

3. The external and internal battery switching device according to claim 1, wherein The internal and external battery switching device further includes: a system control module; The system control module is connected to the dual-channel intelligent switching module, and is used for generating a second switching signal according to the received forced switching signal; The second switching signal is used for controlling the dual-channel intelligent switching module to switch to the internal battery to supply power to the load.

4. The external and internal battery switching device according to claim 3, wherein, The system control module includes: a second transistor, a fifth resistor, and a sixth resistor; The first end of the second transistor is used for receiving the forced switching signal; The second end of the second transistor is connected to one end of the fifth resistor and one end of the sixth resistor; the other end of the fifth resistor is connected to the internal battery; the other end of the sixth resistor is connected to the dual-channel intelligent switching module; The third end of the second transistor is grounded.

5. The internal and external battery switching device according to claim 1, characterized in that The internal and external battery switching device further includes: a first battery reverse connection prevention module; The external battery is connected to the voltage monitoring module through the first battery reverse connection prevention module; The first battery reverse connection prevention module is also connected to the dual-channel intelligent switching module, and is used for blocking the current output of the external battery when the external battery is reversely connected, and conducting the current of the external battery when the external battery is correctly connected.

6. The internal and external battery switching device according to claim 5, characterized in that, The first battery reverse connection prevention module includes: a third transistor, a fourth transistor, and a seventh resistor; The first end of the third transistor is connected to the external battery; the second end of the third transistor is connected to the voltage monitoring module and the dual-channel intelligent switching module; the third end of the third transistor is connected to the first end of the fourth transistor; The first end of the fourth transistor is further connected to the second end of the third transistor through the seventh resistor; the second end of the fourth transistor is connected to the first end of the third transistor, and the third end of the fourth transistor is grounded.

7. The internal and external battery switching device according to claim 5, characterized in that, The internal and external battery switching device further includes: a current sampling module; The first battery reverse connection prevention module is connected to the voltage monitoring module through the current sampling module; The current sampling module is further connected to the dual-path intelligent switching module, and is configured to collect the current of the external battery to determine whether the external battery is successfully switched.

8. The internal and external battery switching device according to claim 1, characterized in that, The internal and external battery switching device further includes: a charging management module; The internal battery is connected to the dual-path intelligent switching module through the charging management module; The charging management module is further connected to an external power supply, and is configured to charge the internal battery through the external power supply and protect the internal battery when the internal battery is working.

9. The internal and external battery switching device according to claim 8, wherein The internal and external battery switching device further includes: a second battery reverse connection prevention module; The internal battery is connected to the charging management module through the second battery reverse connection prevention module; The second battery reverse connection prevention module is configured to block the current output of the internal battery in the case of reverse connection of the internal battery, and conduct the current of the external battery when the internal battery is correctly connected.

10. A thermal imaging telescope, characterized in that, The thermal imaging telescope includes the internal and external battery switching device according to any one of claims 1 to 9.

Images