Detection circuit, start-stop power supply and emergency start power supply

Abstract

The utility model discloses a detection circuit, a start-stop power supply and an emergency start power supply, and the detection circuit comprises a sampling resistor which is used for collecting an electric signal of an energy storage module; the amplifier is connected with the sampling resistor, the amplifier is used for amplifying the electric signals collected by the sampling resistor, the amplifier comprises a feedback circuit, and the feedback circuit comprises an electronic rheostat with variable resistance; the controller is connected with the electronic rheostat, the controller is used for adjusting an electric signal input into the electronic rheostat so as to adjust the resistance value of the electronic rheostat, the resistance value of the electronic rheostat and the amplification factor of the amplifier are in a positive correlation relation, and different amplification factor requirements can be met; meanwhile, the precision, accuracy and the like of the collected amplified electric signals are guaranteed, hardware errors caused by different amplifiers arranged based on different amplification factors can be eliminated, the accuracy of the obtained data is improved, and therefore the problems of judgment and processing errors of the electric signal values are avoided, resources and power consumption needed in the data obtaining process are reduced, and the data obtaining efficiency is improved. And the complexity of the system is reduced.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and more specifically, to a detection circuit, a start-stop power supply, and an emergency start-up power supply. Background Technology

[0002] Current current sensing devices are limited by their hardware characteristics and cannot detect large currents and small currents at the same time. Therefore, for electrical signals flowing through the same sampling resistor, they are usually detected by setting up two independent detection circuits with different amplification factors, and then the two current signals output by the two detection circuits are processed.

[0003] When two amplifier circuits are set up, the controller needs to set up two interfaces to receive signals from the two amplifier circuits respectively. That is, the controller needs additional resources and power consumption to process the signals from the two interfaces, resulting in increased resource consumption and increased system complexity. Summary of the Invention

[0004] This application provides a detection circuit, a start / stop power supply, and an emergency start power supply. These features can avoid increasing the resource consumption of the controller and reduce system complexity.

[0005] The detection circuit of this application includes: a sampling resistor for acquiring electrical signals from the energy storage module; an amplifier connected to the sampling resistor for amplifying the electrical signals acquired by the sampling resistor, the amplifier including a feedback circuit including a variable-value electronic rheostat; and a controller connected to the electronic rheostat for adjusting the input electrical signal to the electronic rheostat to adjust the resistance value of the electronic rheostat, wherein the resistance value of the electronic rheostat and the amplification factor of the amplifier are positively correlated.

[0006] In some embodiments, the controller is used to acquire the electrical signal amplified by the amplifier, and adjust the resistance value of the electronic rheostat if the amplified electrical signal matches the preset electrical signal for a preset time period.

[0007] In some embodiments, the controller is further configured to, after adjusting the resistance value of the electronic rheostat, determine whether the amplified electrical signal matches the preset electrical signal, and if the amplified electrical signal does not match the preset electrical signal, restore the resistance value of the electronic rheostat to the resistance value before adjustment, or readjust the resistance value of the electronic rheostat to the set resistance value.

[0008] In some implementations, the controller determines a set resistance value for the electronic rheostat based on the resistance value of the sampling resistor connected to the amplifier, the set resistance value being negatively correlated with the resistance value of the sampling resistor.

[0009] In some implementations, the controller adjusts the set resistance value of the electronic rheostat based on a comparison between the amplified electrical signal from the amplifier and a preset signal value.

[0010] In some implementations, the magnification factor is within a preset adjustment range, which includes [1, 500].

[0011] In some implementations, the controller includes a sampling port through which the controller acquires the electrical signal amplified by the amplifier.

[0012] In some implementations, the resistance of the sampling resistor is less than 1 milliohm.

[0013] In some embodiments, the electronic rheostat includes an electronically controlled rheostat chip with a resolution greater than 8 bits.

[0014] In some implementations, the error of the electronic rheostat is less than 1%.

[0015] This application also proposes a start-stop power supply, comprising: a housing, the housing including at least a casing; an energy storage module disposed within the housing; a terminal post disposed on one side of the housing and electrically connected to the energy storage module; and a detection circuit as described in any of the above embodiments, the detection circuit being electrically connected to the energy storage module for detecting the electrical signal of the energy storage module.

[0016] In some embodiments, the energy storage module includes a rechargeable power supply and / or a supercapacitor, wherein the rechargeable battery includes a sodium battery, a lithium battery, or a lead-acid battery.

[0017] This application also proposes an emergency start-up power supply, including a housing, the housing including at least a casing; an energy storage module disposed within the housing; a connection port electrically connected to the energy storage module; an output path detachably connected to the connection port, the output path being used to electrically connect the connection port and a vehicle battery; and a detection circuit as described in any of the above embodiments, the detection circuit being electrically connected to the energy storage module for detecting the electrical signal of the energy storage module.

[0018] In some embodiments, the energy storage module includes a rechargeable power supply and / or a supercapacitor, wherein the rechargeable battery includes a sodium battery, a lithium battery, or a lead-acid battery.

[0019] The detection circuit, start-stop power supply, and emergency start-up power supply of this application include a detection circuit comprising a sampling resistor, an amplifier, and a controller. The sampling resistor is used to collect electrical signals from the battery. The amplifier is connected to the sampling resistor and is used to amplify the electrical signals collected by the sampling resistor. The amplifier includes a feedback circuit, which includes a variable-value electronic rheostat. The controller is connected to the electronic rheostat and is used to adjust the electrical signals input to the electronic rheostat to adjust the resistance value of the electronic rheostat. The resistance value of the electronic rheostat and the amplification factor of the amplifier are positively correlated.

[0020] By using a variable-resistance electronic rheostat, different amplification requirements can be met while ensuring the accuracy and precision of the amplified electrical signal. Based on the positive correlation between the resistance of the electronic rheostat and the amplification factor of the amplifier, the resistance of the electronic rheostat can be adjusted simply by changing the input electrical signal through the controller. This allows for setting corresponding amplification factors for different current values, enabling dynamic response to varying current values ​​and thus achieving accurate current detection.

[0021] Since all the acquired electrical signals pass through the same amplifier, hardware errors caused by different amplifiers with different amplification factors can be eliminated, improving the accuracy of the acquired data and thus avoiding errors in the judgment and processing of electrical signal values.

[0022] Furthermore, since only one amplifier is required, the controller only needs to set up one sampling port to obtain the sampled data, which can reduce the resources and power consumption required for data acquisition and reduce the complexity of the system.

[0023] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0025] Figure 1 This is a schematic diagram of a power supply start-up and shutdown scenario according to certain embodiments of this application;

[0026] Figure 2 This is a schematic diagram of a scenario for an energy storage module according to certain embodiments of this application;

[0027] Figure 3 This is a schematic diagram illustrating the application scenario of the electronic rheostat in the energy storage module of some embodiments of this application;

[0028] Figure 4This is a schematic diagram of an emergency start-up power supply according to certain embodiments of this application.

[0029] Explanation of key component reference numerals:

[0030] 1000, Start-stop power supply; 100, Start-stop power supply casing; 200, Start-stop power supply energy storage module; 300, Terminal block; 400, Detection circuit; 10, Battery; 20, Sampling resistor; 30, Amplifier; 31, Feedback circuit; 311, Electronic rheostat; 40, Controller; 2000, Emergency start-up power supply; 500, Emergency start-up power supply casing; 600, Emergency start-up power supply energy storage module; 700, Connection port; 800, Output path. Detailed Implementation

[0031] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting the embodiments of this application.

[0032] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one feature. In the description of this application, "multiple" means at least two, such as two or three, unless otherwise explicitly specified.

[0034] To facilitate understanding of this application, the background technology of this application is introduced below:

[0035] In related technologies, the current of a battery can vary significantly under different operating conditions. For example, the current in a battery may be high during charging, while it may be relatively low under no-load or light-load conditions. When detecting current, different current ranges place different accuracy requirements on the current measuring device. Under high current, the signal changes significantly and rapidly, requiring the current sensing device to handle high input signals; while under low current, the signal changes are minimal, requiring the current sensing device to have higher amplification and higher sensitivity.

[0036] Current current sensing devices (taking amplifiers as an example) typically have an optimal operating range due to their hardware characteristics (e.g., the resistance value of their internal resistors is fixed). If the same amplifier is used to handle both large and small currents, signal saturation may occur when the current is large, while the accuracy may be insufficient when the current is small.

[0037] Therefore, currently, for electrical signals flowing through the same sampling resistor, they are usually detected by setting up two independent amplifier circuits with different amplification factors (one with a relatively large amplification factor and the other with a relatively small amplification factor), and then further processing is performed based on the two corresponding output current signals.

[0038] Correspondingly, when two amplifier circuits are set up, the controller needs to set up two interfaces to receive signals from the two amplifier circuits respectively. The controller requires additional resources and power consumption to process the signals from the two interfaces, resulting in increased resource consumption and increased system complexity.

[0039] To address the aforementioned technical problems, embodiments of this application provide a detection circuit, a start-stop power supply, and an emergency start-up power supply. The detection circuit is used to detect the electrical parameters of the energy storage module of the start-stop power supply or the energy storage module of the emergency start-up power supply. Below, using the detection circuit detecting the electrical parameters of the energy storage module of the start-stop power supply as an example, the detection circuit and start-stop power supply of this application will be described in detail:

[0040] Please see Figure 1 The start / stop power supply 1000 includes:

[0041] Housing 100, housing 100 includes at least a housing;

[0042] Energy storage module 200, which is housed within the outer casing 100;

[0043] The terminal post 300 is located on one side of the housing 100 and is electrically connected to the energy storage module 200.

[0044] The detection circuit 400 is electrically connected to the energy storage module 200 and is used to detect the electrical signal of the energy storage module 200.

[0045] The start-stop power supply 1000 can store electrical energy and can be applied to vehicles to provide power to the vehicle's engine and electrical system. The start-stop power supply 1000 can generate the current required to start the vehicle's engine in a short time to start the vehicle's generator.

[0046] The housing 100 includes at least a casing, which can provide protection for the various components inside the start-stop power supply 1000.

[0047] The energy storage module 200 includes a rechargeable power supply and / or a supercapacitor. The rechargeable battery includes a sodium battery, a lithium battery, or a lead-acid battery. The supercapacitor is also known as a supercapacitor, an electrochemical capacitor, an electrical double-layer capacitor, a gold capacitor, a farad capacitor, etc. Both the rechargeable battery and the supercapacitor can be used to store electrical energy to enable the charging and discharging of the start-stop power supply 1000.

[0048] The energy storage module 200 can be electrically connected to an external circuit via the terminal 300. For example, the energy storage module 200 can be electrically connected to the vehicle's starter motor via the terminal 300. When the vehicle is started, the energy storage module 200 of the start-stop power supply 1000 provides electrical energy to the starter motor via the terminal 300 to start the starter motor, thereby starting the vehicle's engine and realizing the start-stop control of the vehicle. For another example, when the vehicle is in motion, the start-stop power supply 1000 can also receive electrical energy via the terminal 300 to charge the energy storage module 200 of the start-stop power supply 1000.

[0049] Please see Figure 2 In some embodiments, the detection circuit 400 includes:

[0050] Sampling resistor 20 is used to acquire electrical signals from energy storage module 200;

[0051] Amplifier 30 is connected to sampling resistor 20 and is used to amplify the electrical signal acquired by sampling resistor 20.

[0052] Amplifier 30 includes a feedback circuit 31, which includes an electronic rheostat 311 with variable resistance.

[0053] The controller 40 is connected to the electronic rheostat 311. The controller 40 is used to adjust the electrical signal input to the electronic rheostat 311 to adjust the resistance value of the electronic rheostat 311. The resistance value of the electronic rheostat 311 is positively correlated with the amplification factor of the amplifier 30.

[0054] The detection circuit 400 can be used to detect the current value of the energy storage module 200.

[0055] The sampling resistor 20 has a resistance of less than 1 milliohm (mΩ). The sampling resistor 20 can reflect the electrical state of the energy storage module 200.

[0056] The sampling resistor 20 can be connected to the energy storage module 200 of the start-stop power supply 1000. When current flows through the sampling resistor 20, a certain voltage drop will be generated across it. This voltage drop is typically proportional to the current flowing through the sampling resistor 20. By measuring this voltage drop, the electrical signal (which can be voltage, current, etc.) of the energy storage module 200 can be indirectly acquired. For example, please refer to... Figure 2 The feedback circuit 31 is connected to both ends of the sampling resistor 20 (e.g., Figure 2 The feedback circuit 31 has port 1 and port 2, which are respectively connected to the two ends of the sampling resistor 20. One end of the sampling resistor 20 is connected in series with the energy storage module 200, and the other end is connected to other devices (such as loads). By collecting the electrical signals at both ends of the sampling resistor 20, the electrical signals of the energy storage module 200 are collected.

[0057] The amplifier 30 amplifies the electrical signal acquired by the sampling resistor 20. The amplifier 30 includes a feedback circuit 31, which provides feedback of the adjusted electrical signal. The feedback circuit 31 includes an electronic rheostat 311, which can change the magnitude of the feedback electrical signal (e.g., change the magnitude of the feedback voltage signal).

[0058] Optionally, amplifier 30 includes a low-noise amplifier (LNA). Based on its hardware characteristics (e.g., gallium arsenide field-effect transistor low-noise microwave amplifier 30 leverages the high electron mobility and low noise characteristics of gallium arsenide material, combined with precise process control, to effectively reduce internal noise generation mechanisms and achieve low-noise amplification (capable of handling extremely high currents such as 2000A pulse interference)), the low-noise amplifier 30 can amplify weak signals while minimizing its own noise, improving the signal-to-noise ratio, and providing better input signals for subsequent devices. Furthermore, under weak input signals, the additional interference is relatively small, allowing the amplifier 30's amplification factor to be set to several hundred times to meet the low-voltage amplification requirements under low current conditions.

[0059] Specifically, by controlling the resistance value of the electronic rheostat 311, i.e., controlling the resistance value provided by the feedback circuit 31, the adjustment magnitude of the electrical signal acquired by the sampling resistor 20 by the amplifier 30 is changed. The larger the resistance value of the electronic rheostat 311 (the larger the resistance value provided by the feedback circuit 31), the greater the gain (i.e., amplification factor) that the amplifier 30 can provide.

[0060] Optionally, the electronic rheostat 311 includes an electronically controlled rheostat chip with a resolution greater than 8 bits.

[0061] The resolution of the electronically controlled rheostat chip is the minimum achievable change in resistance value during adjustment. Electronically controlled rheostat chips typically adjust resistance values ​​digitally, for example, through digital signals such as PWM (Pulse Width Modulation, a digital encoding method that simulates continuously changing analog signals by changing the pulse width (duty cycle)) or I2C (Inter-Integrated Circuit) signals. When the resolution of the electronically controlled rheostat chip is greater than 8 bits, it can be considered that the chip can provide at least 256 resistance value options. In other words, the resistance adjustment range of the electronically controlled rheostat chip can be divided into at least 256 different resistance values ​​with the same step size, ensuring a smooth transition and guaranteeing precise resistance adjustment to meet circuit requirements when detecting the current of the energy storage module 200.

[0062] Optionally, the error of the electronic rheostat 311 is less than 1%.

[0063] Among them, when the error of the electronic rheostat 311 is less than 1%, the electronic rheostat 311 can be considered as a high-precision rheostat. During the resistance adjustment process, the deviation between the actual resistance value and the set target resistance value will not exceed 1% of the target resistance value. In other words, the electronic rheostat 311 has high precision and a small error range.

[0064] Optionally, the magnification is within a preset adjustment range, which includes [1, 500].

[0065] The amplification factor can be set according to the actual working conditions of the energy storage module 200 of the start-stop power supply 1000, and can be within the preset adjustment range [1,500].

[0066] Optionally, the controller 40 includes a sampling port, through which the controller 40 acquires the electrical signal amplified by the amplifier 30.

[0067] The controller 40 includes a sampling port, which can be connected to the amplifier 30 (e.g., to the output port of the amplifier 30) to acquire the amplified electrical signal from the amplifier 30 for subsequent signal processing. For example, the controller 40 can determine the operating conditions of the power supply 1000 based on the electrical signal acquired through the sampling port; or, taking the electrical signal as including a voltage signal as an example, the controller 40 can also calculate the current value of the energy storage module 200 based on the acquired voltage signal.

[0068] Specifically, the detection circuit 400 may include a sampling resistor 20, an amplifier 30, and a controller 40. The charging and discharging of the energy storage module 200 of the start-stop power supply 1000 can be achieved by controlling the charging and discharging of the energy storage module 200. The sampling resistor 20 can collect electrical signals from the energy storage module 200 of the start-stop power supply 1000, such as current signals (current values) and voltage signals (voltage values). The amplifier 30 is connected to the sampling resistor 20 and is used to process the electrical signals collected by the sampling resistor 20. The amplifier 30 includes a feedback circuit 31, which includes a variable-resistance electronic rheostat 311. The amplifier 30 ensures that the electrical signal acquired by the sampling resistor 20 can be accurately read by the controller 40. The detection circuit 400 also includes a controller 40 connected to the electronic rheostat 311. The controller 40 can adjust the input electrical signal to the electronic rheostat 311 to adjust its resistance value. The resistance value of the electronic rheostat 311 is positively correlated with the amplification factor of the amplifier 30. (For example, the resistance value of the electronic rheostat 311, i.e., the amplification factor of the amplifier 30, can be configured and dynamically adjusted via a terminal connected to the power supply 1000, based on an application (APP) set on the terminal.)

[0069] For example, please see Figure 3 The controller 40 can input electrical signals to the feedback circuit 31 through the same control interface to adjust the feedback circuit 31 (change the resistance value of the electronic rheostat 311), thereby changing the amplification factor of the amplifier 30 on the electrical signal acquired by the sampling resistor 20. More specifically, the resistance value of the electronic rheostat 311 can be changed by controlling the resistance values ​​of IC1 and R1, and the resistance values ​​of IC2 and R3. Under the combined action of the resistance values ​​of these two controls, the resistance value of the electronic rheostat 311 can be adjusted.

[0070] The electrical signal of the energy storage module 200 of the start-stop power supply 1000 varies under different operating conditions. For example, there may be two operating conditions: one greater than 50 amperes (A) and the other less than 50 A. Different amplification factors need to be set to detect the electrical signal values ​​within different ranges to ensure the accuracy and precision of the acquired electrical signal under each operating condition. By setting a variable-resistance electronic rheostat 311, different amplification factor requirements can be accommodated, ensuring the accuracy and precision of the amplified electrical signal. Since the resistance of the electronic rheostat 311 and the amplification factor of the amplifier 30 are positively correlated, the resistance of the electronic rheostat 311 can be adjusted simply by adjusting the electrical signal input to the electronic rheostat 311 via the controller 40. This allows for setting the corresponding amplification factor for different current values ​​and achieving dynamic response to different current values.

[0071] It is understandable that if the amplifier 30 is not required to amplify the electrical signal collected by the sampling resistor 20, the amplification factor of the amplifier 30 can be set to 1, and the amplifier 30 itself can only be used as a buffer.

[0072] It is understandable that in the current scheme of setting up two interfaces to obtain electrical signal values ​​with two different amplification factors, the two detection circuits corresponding to different amplification factors have different deviations, which may lead to discontinuous sampling ranges and abrupt changes in electrical signal values ​​when switching operating conditions (switching between large and small currents), resulting in errors in the judgment and processing of electrical signal values. However, this application only requires one amplifier 30 to realize the processing and acquisition of electrical signals. All acquired electrical signals pass through the same amplifier 30, which can eliminate hardware errors at different amplification factors, improve the accuracy of acquired data, and thus avoid errors in the judgment and processing of electrical signal values. Correspondingly, since only one amplifier 30 is needed, the controller 40 also only needs to be set up with one sampling port to obtain sampled data, reducing the resources and power consumption required for data acquisition and reducing the complexity of the system.

[0073] Thus, the detection circuit 400 includes a sampling resistor 20, an amplifier 30, and a controller 40. The sampling resistor 20 is used to acquire the electrical signal from the energy storage module 200 of the power supply 1000. The amplifier 30 is connected to the sampling resistor 20 and is used to amplify the electrical signal acquired by the sampling resistor 20. The amplifier 30 includes a feedback circuit 31, which includes a variable-value electronic rheostat 311. The controller 40 is connected to the electronic rheostat 311 and is used to adjust the electrical signal input to the electronic rheostat 311 to adjust the resistance value of the electronic rheostat 311. The resistance value of the electronic rheostat 311 is positively correlated with the amplification factor of the amplifier 30. By setting the variable-value electronic rheostat 311, different amplification factor requirements can be met, ensuring the accuracy and precision of the acquired amplified electrical signal. Based on the positive correlation between the resistance of the electronic rheostat 311 and the amplification factor of the amplifier 30, the resistance of the electronic rheostat 311 can be adjusted simply by adjusting the electrical signal input to the electronic rheostat 311 via the controller 40. This achieves the effect of setting corresponding amplification factors for different current values, i.e., dynamic response to different current values. Since all acquired electrical signals pass through the same amplifier 30, hardware errors caused by different amplifiers 30 with different amplification factors can be eliminated, improving the accuracy of the acquired data and avoiding errors in the judgment and processing of electrical signal values. Furthermore, since only one amplifier 30 is required, the controller 40 only needs to be configured with one sampling port to obtain sampled data, which also reduces the resources and power consumption required for data acquisition and reduces the complexity of the system.

[0074] In some embodiments, the controller 40 is used to acquire the electrical signal amplified by the amplifier 30, and adjust the resistance value of the electronic rheostat 311 if the amplified electrical signal matches the preset electrical signal within a preset time period.

[0075] Specifically, when the electrical signal collected by the sampling resistor 20 is amplified by the detection circuit for detection, the larger the amplification factor, the worse the anti-interference capability of the detection circuit. When an interference signal enters the detection circuit, the detection circuit will quickly saturate and then enter a latch-up state, causing the detection circuit to continuously and stably output a preset electrical signal value (e.g., a high voltage value). At this time, the only way to release the latch-up is to disconnect the power supply 1000 that controls the start and stop power supply.

[0076] The controller 40 of this application can be considered to have latched up when it receives an amplified electrical signal that matches a preset electrical signal for a preset duration (e.g., 3 seconds, 4 seconds, 5 seconds, etc.). Matching can be achieved by the amplified electrical signal being equal to the preset electrical signal (e.g., the controller 40 receives a high voltage value of 10 volts (V) for 3 seconds; or by the difference between the amplified electrical signal and the preset electrical signal meeting a preset threshold requirement within the preset duration; or by the amplified electrical signal being continuously greater than the preset electrical signal within the preset duration). At this time, the controller 40 can adjust the signal input to the electronic rheostat 311 to adjust the resistance value of the rheostat (usually by reducing the resistance value of the electronic rheostat 311 to reduce the amplification factor of the amplifier 30), thus restoring the amplifier circuit to operation without needing to disconnect the power.

[0077] Optionally, the controller 40 is also used to determine whether the amplified electrical signal matches the preset electrical signal after adjusting the resistance value of the electronic rheostat 311, and if the amplified electrical signal does not match the preset electrical signal, restore the resistance value of the electronic rheostat 311 to the resistance value before adjustment, or readjust the resistance value of the electronic rheostat 311 to the set resistance value.

[0078] Specifically, when the latch is released by the controller 40, the resistance value of the electronic rheostat 311 can be restored to the value before adjustment to continue monitoring. Alternatively, the resistance value of the electronic rheostat 311 can be reset by the controller 40 (e.g., by a terminal that is communicatively connected to the start / stop power supply 1000) to continue monitoring.

[0079] Please see Figure 2 and Figure 3 In some implementations, the controller 40 determines the set resistance value of the electronic rheostat 311 based on the resistance value of the sampling resistor 20 connected to the amplifier 30, and the set resistance value is negatively correlated with the resistance value of the sampling resistor 20.

[0080] Specifically, the controller 40 controls the amplification gain of the amplifier 30 by adjusting the resistance value of the electronic rheostat 311. The resistance value of the sampling resistor 20 directly affects the voltage drop across it. The larger the resistance value of the sampling resistor 20, the smaller the set resistance value of the electronic rheostat 311, and the smaller the amplification factor of the amplifier 30, so as to avoid excessive output current signal, which would affect the accuracy of detection. Conversely, if the resistance value of the sampling resistor 20 is smaller, the set resistance value can be larger, so that the amplifier 30 can provide a sufficiently large amplification gain to ensure the accuracy of detection. Therefore, by adjusting the set resistance value of the electronic rheostat 311, the amplification factor of the amplifier 30 is adjusted, so that the sampling resistor 20 provides a feedback signal related to the change of electrical signal. The set resistance value is used as an adjustment parameter. By setting a negative correlation between the set resistance value and the resistance value of the sampling resistor 20 (that is, the larger the resistance value of the sampling resistor 20, the smaller the set resistance value, and the smaller the resistance value of the sampling resistor 20, the larger the set resistance value), the electrical signal of the energy storage module 200 can be accurately detected.

[0081] In some implementations, the controller 40 adjusts the set resistance value of the electronic rheostat 311 based on a comparison between the amplified electrical signal from the amplifier 30 and a preset signal value.

[0082] The preset signal value can be a preset percentage of the signal range (for example, it can be 20%, 25%, 30%, 35%, etc. of the electrical signal value).

[0083] Specifically, when the electrical signal acquired by the sampling resistor 20 is amplified by the amplifier 30, the amplification factor of the amplifier 30 can be determined by comparing the acquired electrical signal value with a preset signal value (e.g., the acquired signal range). Then, based on the amplification factor, the resistance value of the variable resistor can be deduced. For example, taking a preset signal value that includes 30% of the signal range as an example, if the value of the electrical signal acquired by the sampling resistor 20 is less than 30% of the signal range, the amplification factor of the amplifier 30 can be increased to ensure the accuracy of the acquired electrical signal.

[0084] Please see Figure 4This application also proposes an emergency jump starter 2000, which can provide electrical power to a vehicle when it cannot start due to insufficient battery power or other reasons. The emergency jump starter 2000 includes a housing 500, an energy storage module 600 (the energy storage module 600 of the emergency jump starter 2000 includes a rechargeable power supply and / or a supercapacitor, wherein the rechargeable battery includes a sodium battery, a lithium battery, or a lead-acid battery), a connection port 700, an output path 800, and a detection circuit 400 as described in any of the above embodiments. The emergency jump starter 2000 includes at least a housing 500. An energy storage module 600 is housed within the housing. A connection port 700 is electrically connected to the energy storage module 600. An output path 800 is detachably connected to the connection port 700 and is used to electrically connect the connection port 700 to a vehicle battery. The energy storage module 600 outputs electrical energy through the connection port 700, and this electrical energy can be transferred to the vehicle battery through the output path 800. A detection circuit 400 is electrically connected to the energy storage module 600. The detection circuit 400 is used to detect the electrical signal of the energy storage module 600 and achieves the same technical effect as any of the above embodiments. To avoid repetition, it will not be described again here.

[0085] In the description of this specification, the references to terms such as "some embodiments," "in one example," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0086] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0087] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A detection circuit, characterized in that, include: A sampling resistor, used to acquire electrical signals from the energy storage module; An amplifier connected to the sampling resistor, the amplifier being used to amplify the electrical signal acquired by the sampling resistor, the amplifier including a feedback circuit, the feedback circuit including an electronic rheostat with variable resistance; A controller is connected to the electronic rheostat. The controller is used to adjust the electrical signal input to the electronic rheostat to adjust the resistance value of the electronic rheostat. The resistance value of the electronic rheostat is positively correlated with the amplification factor of the amplifier.

2. The detection circuit according to claim 1, characterized in that, The controller is used to acquire the electrical signal after it has been amplified by the amplifier, and adjust the resistance value of the electronic rheostat if the amplified electrical signal matches the preset electrical signal within a preset time period.

3. The detection circuit according to claim 2, characterized in that, The controller is also configured to, after adjusting the resistance value of the electronic rheostat, determine whether the amplified electrical signal matches the preset electrical signal, and if the amplified electrical signal does not match the preset electrical signal, restore the resistance value of the electronic rheostat to the value before adjustment, or readjust the resistance value of the electronic rheostat to the set resistance value.

4. The detection circuit according to any one of claims 1-3, characterized in that, The controller determines the set resistance value of the electronic rheostat based on the resistance value of the sampling resistor connected to the amplifier, and the set resistance value is negatively correlated with the resistance value of the sampling resistor.

5. The detection circuit according to claim 1, characterized in that, The controller adjusts the set resistance value of the electronic rheostat based on a comparison between the amplified electrical signal and a preset signal value.

6. The detection circuit according to claim 1, characterized in that, The magnification factor is within a preset adjustment range, which includes [1, 500].

7. The detection circuit according to claim 1, characterized in that, The controller includes a sampling port, through which the controller acquires the electrical signal amplified by the amplifier.

8. The detection circuit according to claim 1, characterized in that, The resistance of the sampling resistor is less than 1 milliohm.

9. The detection circuit according to claim 1, characterized in that, The electronic rheostat includes an electronically controlled rheostat chip, and the resolution of the electronically controlled rheostat chip is greater than 8 bits.

10. The detection circuit according to claim 1, characterized in that, The error of the electronic rheostat is less than 1%.

11. A start-stop power supply, characterized in that, include: The housing, which includes at least a shell; An energy storage module, wherein the energy storage module is disposed within the housing; The electrode post is located on one side of the outer casing and is electrically connected to the energy storage module; And the detection circuit according to any one of claims 1-10, wherein the detection circuit is electrically connected to the energy storage module and is used to detect the electrical signal of the energy storage module.

12. The start / stop power supply according to claim 11, characterized in that, The energy storage module includes a rechargeable power supply and / or a supercapacitor, wherein the rechargeable battery includes a sodium battery, a lithium battery, or a lead-acid battery.

13. An emergency start-up power supply, characterized in that, include: The housing, which includes at least a shell; An energy storage module, wherein the energy storage module is disposed within the housing; The connection port is electrically connected to the energy storage module; An output path, which is detachably connected to the connector, is used to electrically connect the connector and the vehicle battery; And the detection circuit according to any one of claims 1-10, wherein the detection circuit is electrically connected to the energy storage module and is used to detect the electrical signal of the energy storage module.

14. The emergency start-up power supply according to claim 13, characterized in that, The energy storage module includes a rechargeable power supply and / or a supercapacitor, wherein the rechargeable battery includes a sodium battery, a lithium battery, or a lead-acid battery.

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