Battery state test circuit, test method and test device

Abstract

The invention relates to the technical field of battery testing, and discloses a battery state testing circuit, a testing method and a testing device. The battery state test circuit comprises a signal acquisition module, a power module, a discharge control module, a controller and a reset control module, the signal acquisition module is located between the positive electrode output end of a battery and the controller, and the input end of the power module is electrically connected with the output end of the signal acquisition module; the output end of the power module is electrically connected with the discharging control module, the controller controls the battery to be switched between the load state and the non-load state through the discharging control module, the state of the battery is judged according to signals of the battery in the two states, and therefore the overall efficiency and the service life of the battery are guaranteed. And when the reset control module detects that the control signal of the control end of the discharge control module is abnormal, the controller is reset, so that the power module is protected, and the stability and reliability of the circuit are greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery testing, and in particular to a battery status testing circuit, testing method and testing device. Background Art

[0002] With the continuous advancement of science and technology, battery technology has also been increasingly improved, and its application range has become increasingly extensive. However, after long-term use, the internal resistance of the battery gradually increases, resulting in the inability to maintain the output voltage at the nominal level, which in turn affects the overall performance and service life of the battery. This performance degradation may not only interfere with the normal operation of battery-powered devices, but may also bring unforeseen risks and challenges. Summary of the invention

[0003] In view of this, the embodiments of the present application provide a battery status test circuit, a test method and a test device, which can effectively solve the problem in the prior art that after long-term use, the internal resistance of the battery gradually increases, resulting in performance degradation, which may not only interfere with the normal operation of battery-powered devices, but also bring unforeseen risks and challenges.

[0004] In a first aspect, an embodiment of the present application provides a battery status test circuit, including: a signal acquisition module, a power module, a discharge control module, a controller and a reset control module;

[0005] The input end of the signal acquisition module is used to connect to the positive output end of the battery, and the output end of the signal acquisition module is electrically connected to the controller;

[0006] The input end of the power module is electrically connected to the signal acquisition module, and the output end of the power module is electrically connected to the discharge control module;

[0007] The controller is used to send a control signal to the discharge control module to control the access state of the power module, thereby controlling the battery to switch between the load state and the non-load state, and judging the state of the battery according to the signal of the battery in the load state or the non-load state collected by the signal acquisition module;

[0008] The reset control module is used to detect the control signal and reset the controller when it is detected that the control signal is abnormal.

[0009] In some embodiments, the reset control module includes: a signal detection unit and a comparator, the input end of the signal detection unit is connected to the control end of the discharge control module, the output end of the signal detection unit is connected to the inverting input end of the comparator, the non-inverting input end of the comparator is used to input a reference signal, and the output end of the comparator is connected to the reset end of the controller.

[0010] In some embodiments, the reset control module further includes: a reference voltage unit, the input end of the reference voltage unit is used to connect to a power supply, and the output end of the reference voltage unit is connected to the non-inverting input end of the comparator.

[0011] In some embodiments, the signal detection unit includes: a first resistor and a first capacitor, one end of the first resistor is connected to the control end of the discharge control module, the other end of the first resistor is connected to the positive end of the first capacitor, the positive end of the first capacitor is connected to the inverting input end of the comparator, and the negative end of the first capacitor is grounded.

[0012] In some embodiments, the signal acquisition module includes: a voltage divider unit, the input end of the voltage divider unit is used to connect to the positive output end of the battery, and the output end of the voltage divider unit is electrically connected to the controller.

[0013] In some embodiments, the signal acquisition module further includes: a voltage stabilizing unit, one end of the voltage stabilizing unit is connected to the output end of the voltage dividing unit, and the other end of the voltage stabilizing unit is grounded.

[0014] In some embodiments, the signal acquisition module further includes: a filter unit, one end of the filter unit is connected to the output end of the voltage divider unit, and the other end of the filter unit is grounded.

[0015] In a second aspect, an embodiment of the present application provides a battery status testing method, the battery status testing method is applied to at least one battery status testing circuit described in the first aspect, the testing method comprising:

[0016] Controlling the battery to switch between the load state and the non-load state by the discharge control module;

[0017] Determining the state of the battery according to the signal of the battery in the load state and the non-load state;

[0018] Resetting is performed according to a reset signal output by the reset control module when the control signal is abnormal.

[0019] In a third aspect, an embodiment of the present application provides a battery status testing device, wherein the battery status testing device comprises at least one battery status testing circuit as described in the first aspect.

[0020] In some embodiments, the battery status testing device is a test clamp.

[0021] The embodiments of the present application have the following beneficial effects:

[0022] The battery status test circuit of the present application includes a signal acquisition module, a power module, a discharge control module, a controller and a reset control module. The input end of the signal acquisition module is used to connect to the positive output end of the battery, and the output end of the signal acquisition module is electrically connected to the controller; the input end of the power module is electrically connected to the signal acquisition module, and the output end of the power module is electrically connected to the discharge control module. The controller sends a control signal to the discharge control module to control the access state of the power module, thereby controlling the battery to switch between a load state and a non-load state, and judges the state of the battery according to the signal of the battery in a load state or a non-load state collected by the signal acquisition module, so as to ensure the overall performance and service life of the battery. The present application uses the reset control module to detect the control signal of the control end of the discharge control module, and when the control signal is detected to be abnormal, the controller is reset to protect the power module, which greatly improves the stability and reliability of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A first structural schematic diagram of a battery status test circuit according to an embodiment of the present application is shown;

[0025] Figure 2 A second structural schematic diagram of the battery status test circuit according to an embodiment of the present application is shown;

[0026] Figure 3 A circuit diagram of a battery status test circuit according to an embodiment of the present application is shown;

[0027] Figure 4 The figure shows a timing control waveform diagram of the battery status test circuit according to an embodiment of the present application;

[0028] Figure 5 A schematic diagram of a battery status test method according to an embodiment of the present application is shown;

[0029] Figure 6 A schematic diagram of the structure of a battery status testing device according to an embodiment of the present application is shown.

[0030] Description of main component symbols:

[0031] 10: signal acquisition module; 20: power module; 30: discharge control module; 40: controller; 50: reset control module; 101: voltage dividing unit; 102: voltage stabilizing unit; 103: filtering unit; 501: signal detection unit; 502: comparator; 503: reference voltage unit. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0033] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0034] Hereinafter, the terms "including", "having" and their cognates used in various embodiments of the present application are intended only to indicate specific features, numbers, steps, operations, elements, components or a combination of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or a combination of the foregoing items or increasing the possibility of one or more features, numbers, steps, operations, elements, components or a combination of the foregoing items. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0035] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0036] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0037] Considering that in the prior art, after long-term use, the internal resistance of the battery gradually increases, resulting in performance degradation, which may not only interfere with the normal operation of the battery-powered equipment, but also bring unforeseen risks and challenges, etc., the embodiment of the present application provides a battery status test circuit, test method and test device. The controller of the present application controls the battery to switch between the load state and the non-load state through the discharge control module, and judges the state of the battery according to the signal of the battery in the load state or the non-load state, so as to ensure the overall performance and service life of the battery, and the present application uses the reset control module to detect the control signal of the control end of the discharge control module, and when the control signal is detected to be abnormal, the controller is reset to protect the power module, which greatly improves the stability and reliability of the circuit.

[0038] The battery status test circuit is described below in conjunction with some specific embodiments.

[0039] Figure 1 A structural schematic diagram of the battery status test circuit of the embodiment of the present application is shown. It is understandable that the battery status test circuit of the embodiment of the present application can be set in any battery status test device, the battery status test circuit can be set in a battery test clip, and can also be set in a tester connected through the test clip, etc. Exemplarily, the battery status test circuit includes: a signal acquisition module 10, a power module 20, a discharge control module 30, a controller 40 and a reset control module 50; the input end of the signal acquisition module 10 is used to connect to the positive output end of the battery, and the output end of the signal acquisition module 10 is electrically connected to the controller 40. Exemplarily, Figure 1 The positive terminal of the battery is indicated by B+. It can be connected to the positive terminal of the battery through a connector or other connection terminal.

[0040] It is understandable that the power module 20 is the load of the battery and can be set according to actual application conditions. Exemplarily, the power module 20 is a power resistor and a single power resistor can be set as the load or multiple power resistors can be set and multiple power resistors can be combined as the load.

[0041] The input end of the power module 20 is electrically connected to the signal acquisition module, the output end of the power module 20 is connected to the input end of the discharge control module 30, the output end of the discharge control module 30 is grounded, and the control end of the discharge control module 30 is electrically connected to the controller 40. The controller 40 controls the battery to switch between the load state and the non-load state through the discharge control module 30.

[0042] Specifically, when the controller 40 controls the discharge control module 30 to be turned on, the battery signal flows through the power module 20 and then flows to the controller 40. At this time, the battery is in a load state; when the controller 40 controls the discharge control module 30 to be turned off, the battery signal flows directly to the controller 40. At this time, the battery is in a no-load state. The controller 40 controls the battery to switch between a load state and a non-load state by controlling the discharge control module 30 to be turned on and off.

[0043] It is understandable that the discharge control module 30 may include any control element. A switch tube may be provided in the discharge control module 30, and the controller 40 controls the battery to switch between a load state and a non-load state by controlling the on and off of the switch tube; an optical coupler may also be provided in the discharge control module 30, and the controller 40 controls the battery to switch between a load state and a non-load state by controlling the on and off of the optical coupler; a relay may also be provided in the discharge control module 30, and the controller 40 controls the battery to switch between a load state and a non-load state by controlling the on and off of the relay, etc.

[0044] The controller 40 can be any controller, such as an MCU, a DSP, or an FPGA. The controller 40 controls the battery to switch between a load state and a no-load state through the discharge control module 30, and determines the state of the battery according to the signal of the battery in a load state or a no-load state. Specifically, the controller 40 can calculate the internal resistance of the battery according to the signal of the battery in a load state and the signal of the battery in a no-load state, and determine the health state of the battery according to the size of the internal resistance of the battery. Furthermore, a threshold value of the internal resistance can be set in the controller 40. If the calculated internal resistance exceeds the threshold value, the controller 40 will sound an alarm to remind relevant personnel to replace the battery, thereby ensuring the normal operation of the battery-powered equipment and improving the power supply reliability of the battery.

[0045] Furthermore, in order to prevent the battery from being in a load state all the time and causing damage to the power module 20, a reset control module 50 is set to detect the control signal of the control end of the discharge control module 30, and the input end of the reset control module 50 is connected to the output end of the controller 40. Demonstratively, the controller 40 is an MCU, and the reset end of the controller 40 is the RESET pin of the MCU. The output end of the reset control module 50 is connected to the reset end of the controller 40. When the reset control module 50 detects that the control signal is abnormal, it outputs a reset signal to the reset end of the controller 40 to reset the controller 40. After the reset, the controller 40 does not output a signal, and the discharge control module 30 is turned off, thereby protecting the power module 20 and further improving the reliability of the circuit.

[0046] The battery status test circuit of the present embodiment is provided with a signal acquisition module 10, a power module 20, a discharge control module 30 and a controller 40. The controller 40 controls the discharge control module 30 to obtain the internal resistance of the battery, so that relevant personnel can evaluate the health status of the battery, predict the performance of the battery, and formulate a more appropriate charging strategy according to the internal resistance of the battery, thereby ensuring the normal operation of battery-powered equipment. In addition, by providing a reset control module 50, when the control signal of the control end of the discharge control module 30 is abnormal, the controller 40 is controlled to reset, the power module 20 is protected, and the reliability of the circuit is further improved.

[0047] As an optional solution, Figure 2 FIG. 1 is another schematic diagram of a battery status test circuit. Accordingly, Figure 3 Shown Figure 2 A circuit diagram of a battery status test circuit.

[0048] In one embodiment, if Figure 2 and Figure 3 As shown, on the basis of the above embodiment, the discharge control module 30 includes a switch tube U4, the input end of the switch tube U4 is connected to the output end of the power module 20, the output end of the switch tube U4 is grounded, and the control end of the switch tube U4 is electrically connected to the controller 40. The switch tube U4 is used to control whether the battery is in a load state. The switch tube U4 is easy to drive and can achieve high-speed response. Specifically, when the controller 40 controls the switch tube U4 to turn on, the battery signal flows to the power module 20 and then flows to the controller 40, and the battery is in a load state; when the controller 40 controls the switch tube U4 to turn off, the battery signal flows directly to the controller 40, and the battery is in a no-load state.

[0049] Exemplarily, the power module is a resistor R11.

[0050] It is understandable that the switch tube U4 can be any type of switch tube. The switch tube U4 can be a triode, a field effect tube, a MOS tube, etc. Exemplarily, the switch tube U4 is a MOS tube.

[0051] The reset control module 50 includes: a signal detection unit 501 and a comparator 502, wherein the input end of the signal detection unit 501 is connected to the control end of the discharge control module 30, the output end of the signal detection unit 501 is connected to the inverting input end of the comparator 502, the non-inverting input end of the comparator 502 is used to input a reference signal, and the output end of the comparator 502 is connected to the reset end of the controller 40. Specifically, the signal detection unit 501 is used to collect the pulse signal output from the controller 40 to the discharge control module 30, and the comparator 502 is used to compare the reference signal with the signal collected by the signal detection unit 501. If the signal collected by the signal detection unit 501 is greater than the reference signal, the comparator 502 outputs a reset signal to the reset end of the controller 40, so that the controller 40 is reset.

[0052] The reference signal can be set according to the actual application situation. It is understandable that the reference signal can be directly provided by the controller 40, or a circuit can be set to provide the reference signal. Exemplarily, a reference voltage unit 503 is set in the reset control module 50, and the reference voltage unit 503 is used to provide a reference signal. The input end of the reference voltage unit 503 is used to connect to the power supply, and the output end of the reference voltage unit 503 is connected to the non-inverting input end of the comparator 502. Figure 3 As shown, the power supply is represented by VCC, and the reference voltage unit 503 is a voltage divider unit composed of resistors R804 and R805. The voltage divider unit is used to divide the power supply signal to provide a reference signal for the comparator 502. The voltage divider unit has a simple structure, and the reference signal of the comparator 502 can be set by adjusting the resistance value in the voltage divider unit, which has high flexibility.

[0053] like Figure 3 As shown, exemplarily, the signal detection unit 501 includes: a first resistor R806 and a first capacitor C34, one end of the first resistor R806 is connected to the control end of the discharge control module 30, the other end of the first resistor R806 is connected to the positive end of the first capacitor C34, the positive end of the first capacitor C34 is connected to the inverting input end of the comparator 502, and the negative end of the first capacitor C34 is grounded.

[0054] It can be understood that the voltage signal at the reverse input terminal of the comparator 502 is the integral voltage of the pulse signal on the first resistor R806 and the first capacitor C34. When the pulse signal is a high-level signal, the first capacitor C34 is charged through the first resistor R806. When the pulse signal is a low-level signal, the first capacitor C34 is discharged through the first resistor R806. When the controller 40 outputs the pulse signal normally, the high-level signal and the low-level signal each occupy half of the entire cycle. The electric energy provided by the pulse signal to the first capacitor C34 is the same as the electric energy released by the first capacitor C34 through the first resistor R806. The voltage signal at the reverse input terminal of the comparator 502 is always smaller than the reference signal at the positive input terminal. The comparator 502 outputs a high-level signal to the reset terminal of the controller 40, and the controller 40 is not reset.

[0055] When an abnormality occurs in the controller 40, a high-level signal is continuously output to the discharge control module 30, and the high-level signal charges the first capacitor C34 through the first resistor R806. When the voltage signal of the first capacitor C34 is greater than the reference signal at the positive input end, the comparator 502 outputs a low-level signal as a reset signal to the reset end of the controller 40, and the controller 40 is reset. Furthermore, the maximum duration for which the controller 40 continuously outputs a high-level signal can be set by setting the parameters of the first resistor R806 and the first capacitor C34 according to actual application conditions. When the controller 40 outputs a high-level signal for a time period greater than the set maximum duration, the comparator 502 outputs a reset signal to the reset end of the controller 40. By setting the maximum duration, the normal operation of the controller 40 is further guaranteed, and the stability of the circuit is improved.

[0056] It is understandable that the controller 40 of this embodiment is reset by a low-level signal at the reset end. As other implementations, if the reset end of the controller 40 is reset by a high-level signal, a reference signal can be input at the reverse input end of the comparator 502, and the positive input end of the comparator 502 is connected to the signal detection unit 501.

[0057] For example, the rated power of resistor R11 is 2W. When the battery is tested, the duration of the pulse signal output by the controller 40 is 3 seconds. The time interval between two tests and the time interval between generating the pulse signal is very long, or the battery only needs to be tested once. Therefore, the average power of resistor R11 is lower than the rated power and will not burn out resistor R11.

[0058] When the controller 40 is abnormal, it continuously outputs a high-level signal to the switch tube U4, and the switch tube U4 is continuously turned on. The real-time power of the resistor R11 reaches 9.6W, which is much higher than the rated frequency of the resistor R11. If the power of the resistor R11 remains at 9.6W for more than 17 seconds, the resistor R11 will be damaged.

[0059] By setting the resistor R806 and the capacitor C34, when the comparator 502 detects that the high-level signal output by the controller 40 exceeds 0.9S, the comparator 502 outputs a reset signal to the reset terminal of the controller 40, so that the controller 40 is reset and the switch tube U4 is turned off, thereby protecting the resistor R11.

[0060] Specifically, by setting resistors R804 and R805, the reference signal is set to 2.8V. When the voltage signal at the reverse input terminal of the comparator 502 is greater than 2.8V, the comparator 502 outputs a low-level signal, and the controller 40 is reset. The pulse signal is a signal with an operating frequency of 2Hz to 250Hz and a duty cycle of 50%. The high-level signal and the low-level signal each occupy half of the entire cycle. The pulse signal is that the electric energy provided by the first capacitor C34 is the same as the electric energy released by the first capacitor C34 through the first resistor R806. The voltage signal at the reverse input terminal of the comparator 502 is always less than 2.8V. The comparator 502 outputs a high-level signal to the reset terminal of the controller 40, which has no effect on the normal operation of the controller 40.

[0061] When an abnormality occurs in the controller 40, a high-level signal is continuously output to the discharge control module 30. The high-level signal charges the first capacitor C34 through the first resistor R806. When the voltage signal of the first capacitor C34 is greater than 2.8V, the comparator 502 outputs a low-level signal as a reset signal to the reset end of the controller 40, and the controller 40 is reset.

[0062] Exemplary, Figure 4 The figure shows a timing control waveform diagram of a battery status test circuit. Specifically, the pulse signal is a pulse signal output by the controller 40, and the pulse width is 0.4S, which does not exceed 0.9S. The signal output by the comparator 502 is represented by a dotted line, which is a high-level signal. The controller 40 will not be reset and can work normally. When the battery is tested normally, the pulse width of the pulse signal is (1 / 2Hz)×50%=0.25S, 0.25S<0.4S, and the RESET reset signal is a high-level signal, which does not affect the normal battery health test.

[0063] In the battery status test circuit of this embodiment, a comparator 502 is set in the reset control module 50. After comparing the signal of the signal detection unit 501 with the reference signal through the comparator 502, the signal is output to the reset end of the controller 40 to control the reset of the controller 40, thereby preventing the controller 40 from continuously outputting a high-level signal and causing damage to the power module 20.

[0064] In one embodiment, if Figure 2 and Figure 3As shown, based on the above embodiment, the signal acquisition module 10 includes a voltage divider unit 101, and the voltage divider unit 101 includes a resistor R4 and a resistor R5. The resistor R4 and the resistor R5 are used to divide the voltage of the signal input to the controller 40 to ensure that the signal input to the controller 40 is within the safe working range of the controller 40.

[0065] Furthermore, the signal acquisition module 10 also includes a diode D3, the anode of the diode D3 is used to connect to the positive output terminal of the battery, and the cathode of the diode D3 is connected to one end of the resistor R4. The unidirectional conductivity of the diode D3 is used to make the battery signal flow to the controller 40. The model of the diode D3 can be set according to the actual application situation. As another embodiment, the signal acquisition module 10 can also be a switching tube, which has a lower forward voltage drop and can reduce losses.

[0066] The signal acquisition module 10 further includes a voltage stabilizing unit 102, one end of which is connected to the output end of the voltage dividing unit 101, and the other end of which is grounded. Figure 3 As shown, the voltage stabilizing unit 102 is a voltage stabilizing diode D5. The signal is stabilized by the voltage stabilizing diode D5 and then transmitted to the controller 40 to ensure that the signal transmitted to the controller 40 does not exceed the maximum input value of the controller 40, thereby protecting the controller 40.

[0067] Furthermore, in order to prevent interference from spike voltage, the signal acquisition module 10 further includes a filter unit 103, one end of which is connected to the output end of the voltage divider unit 101, and the other end of the filter unit 103 is grounded. The filter unit 103 is used to filter the signal. Exemplarily, the filter unit 103 is a filter capacitor C11, which is used to filter the instantaneous spike voltage to ensure that the signal input to the controller 40 is a stable signal.

[0068] In the battery status test circuit of this embodiment, a diode D3 is set in the signal acquisition module 10 to collect the battery signal. The diode D3 can control the signal flow direction of the battery, rectify the signal, improve the signal quality, and prevent reverse current to protect the circuit. A voltage stabilizing diode D5, a filter capacitor C11, a resistor R4 and a resistor R5 are set at the input end of the controller 40. The voltage stabilizing diode D5 can limit the voltage input to the controller 40. When facing signal fluctuations, transient voltage spikes or other abnormal conditions, it can quickly respond and clamp the voltage, thereby protecting the controller 40. The filter capacitor C11 can smooth the signal, maintain the stability of the voltage signal input to the controller 40, reduce the noise interference of the signal, and improve the signal quality. The resistors R4 and R5 can ensure that the signal input to the controller 40 is within the safe working range of the controller 40. The stability and reliability of the system are greatly improved.

[0069] The present application also provides a battery status testing method. Figure 5 The figure shows a flow chart of a battery status test method according to an embodiment of the present application. The test method is applied to the battery status test circuit mentioned in the above embodiment. The test method is executed by the controller 40 in the battery status test circuit, and includes:

[0070] Step S101: controlling the battery to switch between a load state and a non-load state through the discharge control module 30.

[0071] Specifically, when the controller 40 controls the discharge control module 30 to be turned on, the battery signal collected by the signal acquisition module 10 flows through the power module 20 and then flows to the controller 40. At this time, the battery is in a load state; after the controller 40 controls the discharge control module 30 to be turned off, the battery signal collected by the signal acquisition module 10 flows directly to the controller 40. At this time, the battery is in a no-load state.

[0072] Step S102: determining the battery status according to the signals of the battery in the load state and the battery in the non-load state.

[0073] The internal resistance of the battery is calculated based on the signal of the battery under load and the signal under no-load, and the health status of the battery is judged based on the size of the battery internal resistance.

[0074] Step S103: performing a reset according to a reset signal output by the reset control module 50 when the control signal is abnormal.

[0075] The controller 40 receives the reset signal output by the reset control module 50 when the control signal is abnormal, and performs a reset. After the reset, the controller 40 outputs a pulse signal to the discharge control module 30 .

[0076] It can be understood that step S103 is only a component of the state test method and is continuously executed throughout the entire test process, and is not limited to being performed only after step S102.

[0077] In this embodiment, the battery is controlled to switch between the load state and the non-load state by controlling the discharge control module 30, and the state of the battery is determined according to the signal of the battery in the load state and the non-load state. The normal operation of the battery-powered equipment is guaranteed, and the controller 40 of this embodiment is reset according to the reset signal output by the reset control module 50 when the control signal is abnormal, thereby protecting the power module 20 and greatly improving the reliability of the circuit.

[0078] The present application also provides a battery status test device. Exemplarily, the battery status test device includes the above-mentioned battery status test circuit. The battery status test device can be any battery status test device, the battery status test device can be a tester, and the battery status test device can also be a test clip. Exemplarily, Figure 6 As shown, the battery status testing device is a test clamp, and the battery status testing circuit is arranged in the test clamp. The two test clamps are respectively connected to the positive and negative poles of the battery to test the health status of the battery. Furthermore, the test clamp is connected to the car battery to test the battery health status of the car battery and inform the relevant personnel of the test results to remind the relevant personnel to replace the car battery to ensure the normal power supply of the car.

[0079] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and structure diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in an alternative implementation, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the structure diagram and / or the flow diagram, and the combination of boxes in the structure diagram and / or the flow diagram, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0080] In addition, the functional modules or units in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0081] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application.

[0082] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A battery status test circuit, characterized in that: include: Signal acquisition module, power module, discharge control module, controller and reset control module; The input end of the signal acquisition module is used to connect to the positive output end of the battery, and the output end of the signal acquisition module is electrically connected to the controller; The input end of the power module is electrically connected to the signal acquisition module, and the output end of the power module is electrically connected to the discharge control module; The controller is used to send a control signal to the discharge control module to control the access state of the power module, thereby controlling the battery to switch between the load state and the non-load state, and judging the state of the battery according to the signal of the battery in the load state or the non-load state collected by the signal acquisition module; The reset control module is used to detect the control signal and reset the controller when it is detected that the control signal is abnormal.

2. The battery status test circuit according to claim 1, characterized in that: The reset control module includes: a signal detection unit and a comparator, the input end of the signal detection unit is connected to the control end of the discharge control module, the output end of the signal detection unit is connected to the inverting input end of the comparator, the non-inverting input end of the comparator is used to input a reference signal, and the output end of the comparator is connected to the reset end of the controller.

3. The battery status test circuit according to claim 2, characterized in that: The reset control module further includes: a reference voltage unit, the input end of the reference voltage unit is used to connect to a power supply, and the output end of the reference voltage unit is connected to the non-inverting input end of the comparator.

4. The battery status test circuit according to claim 2, characterized in that: The signal detection unit includes: a first resistor and a first capacitor, one end of the first resistor is connected to the control end of the discharge control module, the other end of the first resistor is connected to the positive end of the first capacitor, the positive end of the first capacitor is connected to the inverting input end of the comparator, and the negative end of the first capacitor is grounded.

5. The battery status test circuit according to claim 1, characterized in that: The signal acquisition module comprises: a voltage dividing unit, the input end of the voltage dividing unit is used to connect to the positive output end of the battery, and the output end of the voltage dividing unit is electrically connected to the controller.

6. The battery status test circuit according to claim 5, characterized in that: The signal acquisition module further includes: a voltage stabilizing unit, one end of which is connected to the output end of the voltage dividing unit, and the other end of which is grounded.

7. The battery status test circuit according to claim 5, characterized in that: The signal acquisition module further includes: a filter unit, one end of which is connected to the output end of the voltage divider unit, and the other end of which is grounded.

8. A battery status testing method, characterized in that: Applicable to the battery status test circuit according to any one of claims 1 to 7, the test method comprising: Controlling the battery to switch between the load state and the non-load state by the discharge control module; Determining the state of the battery according to the signal of the battery in the load state and the non-load state; Resetting is performed according to a reset signal output by the reset control module when the control signal is abnormal.

9. A battery status testing device, characterized in that: The battery status testing device comprises: a battery status testing circuit as described in any one of claims 1-7.

10. The battery status testing device according to claim 9, characterized in that: The battery status testing device is a testing clamp.

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