Battery state test circuit and test device

Abstract

The utility model relates to the technical field of battery testing, and discloses a battery state testing circuit and a testing device.The battery state testing circuit comprises a main control module, a power switch module, a signal processing module and a monitoring module, the main control module is electrically connected with the control end of the power switch module, and the main control module is used for outputting a switch control signal to control the connection and disconnection of the power switch module and the signal processing module, and judging the state of the battery according to the signals of the signal processing module in the connection state and the disconnection state. The monitoring module is arranged between the control end of the power switch module and the reset control end of the main control module, and the monitoring module controls the main control module to reset after monitoring that the duration of the switch control signal in the first state exceeds the first preset time. Therefore, the stability and the reliability of the circuit are greatly improved.

Description

Technical Field

[0001] This application relates to the field of battery testing technology, and in particular to a battery state testing circuit and testing device. Background Technology

[0002] With continuous advancements in technology, battery technology has become increasingly sophisticated, and its applications are expanding. However, after prolonged use, the internal resistance of a battery gradually increases, causing the output voltage to fail to maintain its nominal level, thus affecting the battery's overall performance and lifespan. This performance degradation can not only interfere with the normal operation of battery-powered devices but also bring unforeseen risks and challenges. Utility Model Content

[0003] In view of this, the present application provides a battery state testing circuit and testing device, which can effectively solve the problem that after long-term use, the internal resistance of the battery gradually increases, leading to a decline in performance. This may not only interfere with the normal operation of battery-powered equipment, but also bring unforeseen risks and challenges.

[0004] In a first aspect, embodiments of this application provide a battery state testing circuit, including: a main control module, a power switch module, a signal processing module, and a monitoring module;

[0005] The input terminal of the signal processing module is used to connect to the positive output terminal of the battery, and the output terminal of the signal processing module is electrically connected to the main control module.

[0006] The main control module is electrically connected to the control terminal of the power switch module. The main control module is used to output a switch control signal to control the connection and disconnection of the power switch module and the signal processing module, and to determine the state of the battery based on the signal of the signal processing module in the connected state and the disconnected state.

[0007] The monitoring module is located between the control terminal of the power switch module and the reset control terminal of the main control module. The monitoring module is used to control the main control module to reset after detecting that the duration of the switch control signal in the first state exceeds a first preset time.

[0008] In some embodiments, the monitoring module includes: a monitoring controller, the input terminal of which is connected to the control terminal of the power switch module, and the output terminal of which is connected to the reset control terminal of the main control module.

[0009] In some embodiments, the monitoring module further includes a clock unit, which is electrically connected to the monitoring controller.

[0010] In some embodiments, the power switch module includes: a power unit and a switch control unit, wherein the input terminal of the power unit is connected to the input terminal of the signal processing module, the output terminal of the power unit is electrically connected to the input terminal of the switch control unit, the output terminal of the switch control unit is grounded, and the control terminal of the switch control unit is electrically connected to the main control module.

[0011] In some embodiments, the power switch module further includes a switch protection unit, one end of which is connected to the control terminal of the switch control unit, and the other end of which is electrically connected to the main control module.

[0012] In some embodiments, the signal processing module includes: a first resistor and a second resistor, one end of the first resistor is connected to the positive output terminal of the battery, the other end of the first resistor is connected to one end of the second resistor, the other end of the second resistor is grounded, and the series connection of the two resistors is electrically connected to the main control module.

[0013] In some embodiments, the signal processing module further includes a Zener diode, the positive terminal of which is grounded and the negative terminal of which is connected to the series node.

[0014] In some embodiments, the battery state testing circuit further includes a protection module, wherein the input terminal of the protection module is connected to the positive output terminal of the battery, and the output terminal of the protection module is connected to the input terminal of the signal processing module.

[0015] Secondly, embodiments of this application provide a battery state testing device, which includes at least one battery state testing circuit as described in the first aspect above.

[0016] In some embodiments, the battery state testing device is a test clip.

[0017] The embodiments of this application have the following beneficial effects:

[0018] The battery state testing circuit of this application includes a main control module, a power switch module, a signal processing module, and a monitoring module. The input terminal of the signal processing module is connected to the positive output terminal of the battery, and its output terminal is electrically connected to the main control module. The main control module is electrically connected to the control terminal of the power switch module. The main control module outputs a switch control signal to control the connection and disconnection of the power switch module and the signal processing module, and determines the battery state based on the signals from the signal processing module in the connected and disconnected states, thereby ensuring the overall performance and lifespan of the battery. The monitoring module is located between the control terminal of the power switch module and the reset control terminal of the main control module. When the monitoring module detects that the duration of the switch control signal in the first state exceeds a first preset time, it controls the main control module to reset. This protects the power components and greatly improves the stability and reliability of the circuit. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A first structural schematic diagram of the battery state test circuit according to an embodiment of this application is shown;

[0021] Figure 2 A second structural schematic diagram of the battery state test circuit according to an embodiment of this application is shown;

[0022] Figure 3 A circuit diagram of a battery state testing circuit according to an embodiment of this application is shown;

[0023] Figure 4 A schematic diagram of the battery state testing device according to an embodiment of this application is shown.

[0024] Explanation of key component symbols:

[0025] 10: Main control module; 20: Power switch module; 30: Signal processing module; 40: Monitoring module; 50: Protection module; 201: Power unit; 202: Switch control unit; 203: Switch protection unit; 401: Monitoring controller; 402: Clock unit. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0027] The components of the embodiments of this application described and illustrated in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] In the following text, the terms "comprising," "having," and their cognates, which may be used in various embodiments of this application, are intended only to indicate a particular feature, number, step, operation, element, component, or combination thereof, and should not be construed as primarily excluding the presence of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, or adding the possibility of one or more combinations thereof. Furthermore, the terms "first," "second," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0029] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of this application pertain. Terms (such as those defined in commonly used dictionaries) shall be interpreted as having the same meaning as in their contextual meaning in the relevant technical field and shall not be construed as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of this application.

[0030] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] Considering that in existing technologies, the internal resistance of batteries gradually increases after long-term use, leading to performance degradation, which may not only interfere with the normal operation of battery-powered equipment but also bring unforeseen risks and challenges, this application provides a battery state testing circuit and testing device. The main control module of this application outputs a switch control signal to control the connection and disconnection of the power switch module and the signal processing module, and judges the battery state based on the signals from the signal processing module in the connected and disconnected states, thereby ensuring the overall performance and lifespan of the battery. Furthermore, the monitoring module of this application controls the main control module to reset after detecting that the duration of the switch control signal in the first state exceeds a first preset time. This protects the power components and greatly improves the stability and reliability of the circuit.

[0032] The following describes the battery state testing circuit using specific embodiments.

[0033] Figure 1 A schematic diagram of a battery state testing circuit according to an embodiment of this application is shown. It is understood that the battery state testing circuit of this application embodiment can be installed in any type of battery state testing device; the battery state testing circuit can be installed in a battery test clip, or in a tester connected via the test clip, etc.

[0034] Exemplarily, the battery state testing circuit includes: a main control module 10, a power switch module 20, a signal processing module 30, and a monitoring module 40. The input terminal of the signal processing module 30 is connected to the positive output terminal of the battery, and the output terminal of the signal processing module 30 is electrically connected to the main control module 10. The signal processing module 30 processes the signal from the positive output terminal of the battery. The signal processing module 30 can be configured according to the actual application. Exemplarily, a voltage regulator can be installed in the signal processing module 30 to process the signal from the positive output terminal of the battery, such as... Figure 1 As shown, the signal at the positive terminal of the battery is represented by B+.

[0035] Understandably, the main control module 10 can be any type of controller. For example, the main control module 10 is an MCU. The main control module 10 is electrically connected to the control terminal of the power switch module 20. The main control module 10 is used to output a switch control signal to control the connection and disconnection between the power switch module 20 and the signal processing module 30. Specifically, the power switch module 20 is equipped with a power resistor. The switch control signal is divided into a connection signal and a disconnect signal. When the switch control signal is a connection signal, the power resistor and the signal processing module 30 are connected. The battery signal flows through the power resistor and then through the signal processing module 30 to the main control module 10, and the battery is in a load state.

[0036] When the switch control signal is off, the power resistor and signal processing module 30 are disconnected. The battery signal flows directly to the main control module 10 through the signal processing module 30, and the battery is in an unloaded state. The main control module 10 calculates the battery's internal resistance based on the signals from the signal processing module 30 in the connected and disconnected states, and the battery's signals in the loaded and unloaded states. Based on the battery's internal resistance, it determines the battery's health status. Furthermore, when the main control module 10 detects that the battery's internal resistance is too high, it can issue an alarm to prompt relevant personnel to replace the battery, thereby ensuring the normal operation of loads powered by the battery and improving the battery's reliability.

[0037] The input terminal of the monitoring module 40 is connected to the control terminal of the power switch module 20, and the output terminal of the monitoring module 40 is connected to the reset control terminal of the main control module 10. The monitoring module 40 obtains the switch control signal through the control terminal of the power switch module 20. The monitoring module 40 takes the on signal of the switch control signal as the first state of the switch control signal and the off signal of the switch control signal as the second state of the switch control signal. When the main control module 10 malfunctions, it continuously outputs the on signal to the power switch module 20. The power of the power resistor in the power switch module 20 may exceed the rated frequency of the power resistor, causing damage.

[0038] To protect the power resistor in the power switch module 20, when the monitoring module 40 detects that the duration of the switch control signal in the first state exceeds a first preset time, it outputs a reset signal to the reset control terminal of the main control module 10, controlling the main control module 10 to reset. The first preset time can be set according to the actual application, so that the monitoring module 40 can ensure that the main control module 10 can detect the battery normally while also protecting the power resistor.

[0039] The battery status test circuit of this embodiment includes a main control module 10, a power switch module 20, and a signal processing module 30. The main control module 10 controls the connection and disconnection of the power switch module 20 and the signal processing module 30 by outputting a switch control signal. The signal processing module 30 acquires signals indicating that the battery is operating under load and no-load conditions, and calculates the battery's internal resistance based on these signals to determine the battery's health status. This ensures the normal operation of the battery-powered load and improves battery reliability. Furthermore, this embodiment includes a monitoring module 40, which monitors the switch control signal. When the main control module 10 continuously outputs a connection signal, it resets the main control module 10, thereby protecting the power resistor in the power switch module 20 and ensuring circuit stability.

[0040] As an alternative solution, Figure 2The diagram shown is another structural schematic of a battery state testing circuit. Accordingly, Figure 3 As shown Figure 2 A circuit diagram of a battery status testing circuit.

[0041] In one embodiment, such as Figure 2 and Figure 3 As shown, based on the above embodiment, the monitoring module 40 includes a monitoring controller 401. The input terminal of the monitoring controller 401 is connected to the control terminal of the power switch module 20, and the output terminal of the monitoring controller 401 is connected to the reset control terminal of the main control module 10. It is understood that the monitoring controller 401 can be any type of controller. Exemplarily, the monitoring controller 401 is a Bluetooth communication chip, and the monitoring controller 401 can be configured according to the actual application. Exemplarily, the reset signal is represented by RESET, the switch control signal is represented by PWM, and the signal input to the main control module 10 is represented by SAMP.

[0042] Furthermore, the monitoring module 40 also includes a clock unit 402, which is electrically connected to the monitoring controller 401. The clock unit 402 provides a reference signal to the monitoring controller 401 and ensures that the various components in the monitoring controller 401 can operate synchronously, thus ensuring the reliability of the monitoring controller 401.

[0043] The battery status testing circuit in this embodiment uses a monitoring controller 401 to monitor the switching control signals output by the main control module 10, ensuring the accuracy and efficiency of the monitoring. Furthermore, a clock unit 402 is connected to the monitoring controller 401, providing a basic time reference for the monitoring controller 401. A synchronization mechanism also ensures orderly cooperation between the various parts, greatly improving the overall performance of the monitoring controller 401.

[0044] In one embodiment, such as Figure 2 and Figure 3 As shown, based on the above embodiment, the power switch module 20 includes a power unit 201 and a switch control unit 202. The input terminal of the power unit 201 is connected to the input terminal of the signal processing module 30, and the output terminal of the power unit 201 is electrically connected to the input terminal of the switch control unit 202. The power unit 201 serves as a load for the battery and may include one power resistor or multiple power resistors. Exemplarily, the power unit 201 is a resistor R2.

[0045] The input terminal of the switch control unit 202 is connected to one end of the resistor R2, the output terminal of the switch control unit 202 is grounded, and the control terminal of the switch control unit 202 is electrically connected to the main control module 10. It is understood that the switch control unit 202 can be any type of switch control element; exemplaryly, the switch control unit 202 is the switch transistor U4. Furthermore, to protect the switch transistor U4, the power switch module 20 also includes a switch protection unit 203, which is located between the control terminal of the switch control unit 202 and the main control module 10. Exemplarily, the switch protection unit 203 is a resistor R8. Resistor R8 can limit the current input to the switch transistor U4, preventing damage to the switch transistor U4 due to overcurrent. It also protects the main control module 10, preventing damage to the main control module 10 in the event of a short circuit fault in the switch transistor U4.

[0046] In one embodiment, such as Figure 2 and Figure 3 As shown, based on the above embodiment, the battery status test circuit further includes a protection module 50. The input terminal of the protection module 50 is connected to the positive output terminal of the battery, and the output terminal of the protection module 50 is connected to the input terminal of the signal processing module 30. The protection module 50 is used to protect the battery. Exemplarily, the protection module 50 is a diode D1. Utilizing the unidirectional conductivity of the diode D1, the signal flow of the battery is controlled to the main control module 10 while protecting the battery.

[0047] In one embodiment, such as Figure 2 and Figure 3 As shown, based on the above embodiment, the signal processing module 30 includes: a first resistor R4 and a second resistor R5. One end of the first resistor R4 is connected to the positive output terminal of the battery, and the other end of the first resistor R4 is connected to one end of the second resistor R5. The other end of the second resistor R5 is grounded, and the series connection of the two resistors is electrically connected to the main control module 10. Specifically, the first resistor R4 and the second resistor R5 divide the battery signal to ensure that the signal input to the main control module 10 does not exceed the maximum value of the input terminal of the main control module 10, thereby protecting the main control module 10.

[0048] To prevent the main control module 10 from being subjected to high-voltage surges, the signal processing module 30 also includes a Zener diode D5. The positive terminal of the Zener diode D5 is grounded, and the negative terminal of the Zener diode D5 is connected to a series node. When the signal input to the main control module 10 exceeds the breakdown voltage of the Zener diode D5, the Zener diode D5 conducts, maintaining a stable voltage level and protecting the main control module 10.

[0049] Furthermore, the signal processing module 30 also includes a filter capacitor C11, one end of which is connected to a series node, and the other end of which is grounded. The filter capacitor C11 is used to filter out ripple and noise in the signal.

[0050] In this embodiment, the battery status test circuit uses resistors R4 and R5 to divide the voltage at the input of the main control module 10, and also includes a Zener diode D5 and a filter capacitor C11 to ensure the quality and stability of the signal input to the main control module 10.

[0051] This application also provides a battery state testing apparatus, exemplary of which includes the aforementioned battery state testing circuit. The battery state testing apparatus can be any type of battery state testing apparatus; it can be a tester or a test clip, exemplary as... Figure 4 As shown, the battery status testing device is a test clip, and the battery status testing circuit is set in the test clip. The two test clips are connected to the positive and negative terminals of the battery respectively to test the battery's health status. Furthermore, the test clips are connected to the car battery to test the car battery's health status and inform relevant personnel of the test results to remind them to replace the car battery and ensure the car's normal power supply.

[0052] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that, in alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0053] In addition, the functional modules or units in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0054] If the aforementioned functions are implemented as software functional 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 this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a smartphone, personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0055] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A battery state test circuit, characterized by, The battery state testing circuit comprises: a main control module, a power switch module, a signal processing module and a monitoring module; an input end of the signal processing module is used for connecting a positive output end of a battery, and an output end of the signal processing module is electrically connected with the main control module; the main control module is electrically connected with a control end of the power switch module, the main control module is used for outputting a switch control signal to control the power switch module and the signal processing module to be connected or disconnected, and the state of the battery is judged according to signals of the signal processing module in the connected state and the disconnected state; the monitoring module is arranged between the control end of the power switch module and a reset control end of the main control module, and the monitoring module is used for controlling the main control module to reset after monitoring that the duration of the switch control signal in a first state exceeds a first preset time.

2. The battery state test circuit of claim 1, wherein, The monitoring module comprises: a monitoring controller, an input end of the monitoring controller is connected with the control end of the power switch module, and an output end of the monitoring controller is connected with the reset control end of the main control module.

3. The battery state test circuit of claim 2, wherein, The monitoring module further comprises: a clock unit, the clock unit is electrically connected with the monitoring controller.

4. The battery state test circuit of claim 1, wherein, The power switch module comprises: a power unit and a switch control unit, an input end of the power unit is connected with the input end of the signal processing module, an output end of the power unit is electrically connected with an input end of the switch control unit, an output end of the switch control unit is grounded, and a control end of the switch control unit is electrically connected with the main control module.

5. The battery state test circuit of claim 4, wherein, The power switch module further comprises: a switch protection unit, one end of the switch protection unit is connected with the control end of the switch control unit, and the other end of the switch protection unit is electrically connected with the main control module.

6. The battery state test circuit of claim 1, wherein, The signal processing module comprises: a first resistor and a second resistor, one end of the first resistor is used for connecting the positive output end of the battery, the other end of the first resistor is connected with one end of the second resistor, the other end of the second resistor is grounded, and a series connection node of the two resistors is electrically connected with the main control module.

7. The battery state test circuit of claim 6, wherein, The signal processing module further comprises: a voltage stabilizing diode, a positive end of the voltage stabilizing diode is grounded, and a negative end of the voltage stabilizing diode is connected with the series connection node.

8. The battery state test circuit of claim 1, wherein, The battery state testing circuit further comprises: a protection module, an input end of the protection module is used for connecting the positive output end of the battery, and an output end of the protection module is connected with the input end of the signal processing module.

9. A battery state testing device characterized by comprising: The battery state testing device comprises: the battery state testing circuit according to any one of claims 1-8.

10. The battery state testing apparatus according to claim 9, wherein The battery state testing device is a testing clamp.

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