Battery charging and discharging protection circuit

Abstract

The utility model discloses a battery charging and discharging protection circuit, which comprises a winding port, a battery port, a controlled port, a load port, a voltage conversion module, a battery management module, a battery protection module and a trigger module, the winding port and the controlled port are respectively connected with the trigger module, the battery port is respectively connected with the battery management module and the battery protection module, the battery protection module is connected with the voltage conversion module, the voltage conversion module is connected with the load port, and the trigger module is connected with the battery management module; the battery management module is configured to be started or not according to the level signal transmitted by the trigger module. According to the technical scheme, the trigger module and the battery management module are configured, the trigger module controls the level signal output to the battery management module according to the voltage signals input by the winding port and the controlled port, and the battery management module can control starting and closing of the battery management module according to the level signal. Therefore, the reliability of the battery charging and discharging circuit is effectively improved.

Description

A battery charge and discharge protection circuit Technical Field

[0001] This utility model relates to the field of electronic circuit technology, and more specifically to a battery charging and discharging protection circuit. Background Technology

[0002] To meet the demand for portable power supplies during daily travel, engineers in related fields are focusing on switching battery charging and discharging control technology. Existing battery charging and discharging circuits primarily convert 220V AC voltage into a DC voltage suitable for battery charging. Therefore, battery charging and discharging circuits mainly include a rectification section, a filtering section, a switching power supply section, and a battery charging and discharging management section.

[0003] Existing battery charge and discharge management circuits cannot control their start-up and shutdown based on external AC power, and lack external control means, resulting in a lack of reliability in existing battery charge and discharge management circuits. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a battery charging and discharging protection circuit.

[0005] The technical solution adopted by this utility model to solve the problem is:

[0006] A battery charge and discharge protection circuit includes a winding port, a battery port, a controlled port, a load port, a voltage conversion module, a battery management module, a battery protection module, and a trigger module.

[0007] The winding port and the controlled port are respectively connected to the trigger module, the battery port is respectively connected to the battery management module and the battery protection module, the battery protection module is connected to the voltage conversion module, the voltage conversion module is connected to the load port, and the trigger module is connected to the battery management module;

[0008] The battery management module is configured to control whether it starts or not based on the level signal transmitted by the trigger module.

[0009] As a further improvement to the above technical solution, the trigger module includes a diode D1, a resistor R1, a resistor R2, and a transistor Q1. The winding port is connected to the positive terminal of the diode D1, the negative terminal of the diode D1 is connected to the battery management module, one end of the resistor R1 is connected to the power supply terminal, the other end of the resistor R1 is connected to the base of the transistor Q1, one end of the resistor R2 is connected to the power supply terminal, the other end of the resistor R2 is connected to the emitter of the transistor Q1, the emitter of the transistor Q1 is connected to the controlled port, and the collector of the transistor Q1 is connected to the battery management module.

[0010] As a further improvement to the above technical solution, the battery management module includes a battery management chip of model TC4056A, resistor R3, and resistor R4. The battery management chip is configured with an enable terminal and a charging terminal. The negative terminal of the diode D1 is connected to the enable terminal of the battery management chip through the resistor R3. The collector of the transistor Q1 is connected to the enable terminal of the battery management chip. The enable terminal of the battery management chip is connected to the ground terminal through the resistor R4. The charging terminal of the battery management chip is connected to the battery port.

[0011] As a further improvement to the above technical solution, the battery protection module includes a battery protection chip of model XB8089D, a resistor R5, and a capacitor C1. The battery protection chip is configured with a positive terminal, a negative terminal, and a ground terminal. The ground terminal of the battery protection chip is connected to the ground terminal. The positive terminal of the battery protection chip is connected to the battery port through the resistor R5. The positive terminal of the battery protection chip is also connected to the voltage conversion module through the resistor R5. The negative terminal of the battery protection chip is connected to the battery port. The positive terminal of the battery protection chip is connected to the negative terminal of the battery protection chip through the capacitor C1.

[0012] As a further improvement to the above technical solution, the voltage conversion module includes a converter chip of model SCT12A2, resistors R6, R7, and R8, capacitors C2 and C3, inductor L1, and diode D2. The converter chip is configured with an input terminal, an enable terminal, a feedback terminal, an output terminal, a frequency setting terminal, a switching terminal, and a startup terminal. The battery protection module is connected to the input terminal and the enable terminal of the converter chip. The startup terminal of the converter chip is connected to the switching terminal of the converter chip through capacitor C2. The switching terminal of the converter chip is connected to the battery protection module through inductor L1. The switching terminal of the converter chip is connected to the frequency setting terminal of the converter chip through resistor R6. The output terminal of the converter chip is connected to the positive terminal of diode D2, and the negative terminal of diode D2 is connected to the load port. The output terminal of the converter chip is connected to ground through capacitor C3. The output terminal of the converter chip is connected to ground successively through resistors R7 and R8. The feedback terminal of the converter chip is connected to the connection point of resistors R7 and R8.

[0013] The beneficial effects of this utility model are: the technical solution is equipped with a trigger module and a battery management module. The trigger module controls the output level signal to the battery management module according to the voltage signal input to the winding port and the controlled port. The battery management module can control its start and stop according to the level signal, thereby effectively improving the reliability of the battery charging and discharging circuit. Attached Figure Description

[0014] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 is a circuit diagram of this utility model;

[0016] Figure 2 is a circuit diagram of the trigger module and the battery management module in this utility model;

[0017] Figure 3 is a circuit diagram of the battery protection module in this utility model;

[0018] Figure 4 is a circuit diagram of the voltage conversion module in this utility model. Detailed Implementation

[0019] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] Referring to Figures 1 to 4, this application discloses a battery charging and discharging protection circuit. In its first embodiment, it includes a winding port, a battery port, a controlled port, a load port, a voltage conversion module, a battery management module, a battery protection module, and a trigger module. The winding port is used to connect to a winding of an external transformer, and the controlled port is used to connect to an output terminal of an external intelligent controller.

[0024] The winding port and the controlled port are respectively connected to the trigger module, the battery port is respectively connected to the battery management module and the battery protection module, the battery protection module is connected to the voltage conversion module, the voltage conversion module is connected to the load port, and the trigger module is connected to the battery management module;

[0025] The battery management module is configured to control whether it is activated or not based on the level signal transmitted by the trigger module.

[0026] Specifically, in this embodiment, by configuring the trigger module and the battery management module, the trigger module controls the output level signal to the battery management module according to the voltage signal input from the winding port and the controlled port. The battery management module can control its start-up and shutdown according to the level signal, thereby effectively improving the reliability of the battery charging and discharging circuit.

[0027] As a further preferred embodiment, in this embodiment, the trigger module includes a diode D1, a resistor R1, a resistor R2, and an NPN transistor Q1. The winding port is connected to the positive terminal of the diode D1, the negative terminal of the diode D1 is connected to the battery management module, one end of the resistor R1 is connected to the power supply terminal, the other end of the resistor R1 is connected to the base of the transistor Q1, one end of the resistor R2 is connected to the power supply terminal, the other end of the resistor R2 is connected to the emitter of the transistor Q1, the emitter of the transistor Q1 is connected to the controlled port, and the collector of the transistor Q1 is connected to the battery management module.

[0028] As a further preferred embodiment, in this embodiment, the battery management module includes a battery management chip of model TC4056A, resistor R3, and resistor R4. The battery management chip is configured with an enable terminal and a charging terminal. The negative terminal of the diode D1 is connected to the enable terminal of the battery management chip through the resistor R3. The collector of the transistor Q1 is connected to the enable terminal of the battery management chip. The enable terminal of the battery management chip is connected to ground through the resistor R4. The charging terminal of the battery management chip is connected to the battery port.

[0029] As a further preferred embodiment, in this embodiment, the battery protection module includes a battery protection chip of model XB8089D, a resistor R5, and a capacitor C1. The battery protection chip is configured with a positive terminal, a negative terminal, and a ground terminal. The ground terminal of the battery protection chip is connected to the ground terminal. The positive terminal of the battery protection chip is connected to the battery port through the resistor R5. The positive terminal of the battery protection chip is also connected to the voltage conversion module through the resistor R5. The negative terminal of the battery protection chip is connected to the battery port. The positive terminal of the battery protection chip is connected to the negative terminal of the battery protection chip through the capacitor C1.

[0030] As a further preferred embodiment, in this embodiment, the voltage conversion module includes a converter chip of model SCT12A2, resistors R6, R7, and R8, capacitors C2 and C3, inductor L1, and diode D2. The converter chip is configured with an input terminal, an enable terminal, a feedback terminal, an output terminal, a frequency setting terminal, a switching terminal, and a start-up terminal. The battery protection module is connected to the input terminal and the enable terminal of the converter chip respectively. The start-up terminal of the converter chip is connected to the switching terminal of the converter chip through capacitor C2. The switching terminal of the converter chip is connected to the battery protection module through inductor L1. The switching terminal of the converter chip is connected to the frequency setting terminal of the converter chip through resistor R6. The output terminal of the converter chip is connected to the positive terminal of diode D2, and the negative terminal of diode D2 is connected to the load port. The output terminal of the converter chip is connected to ground through capacitor C3. The output terminal of the converter chip is connected to ground successively through resistors R7 and R8. The feedback terminal of the converter chip is connected to the connection point of resistors R7 and R8.

[0031] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the concept of this utility model and the contents of the specification and drawings of this utility model, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A battery charge / discharge protection circuit, characterized in that: It includes a winding port, a battery port, a controlled port, a load port, a voltage conversion module, a battery management module, a battery protection module, and a trigger module; the winding port and the controlled port are respectively connected to the trigger module, the battery port is respectively connected to the battery management module and the battery protection module, the battery protection module is connected to the voltage conversion module, the voltage conversion module is connected to the load port, and the trigger module is connected to the battery management module; the battery management module is configured to control its activation or deactivation based on the level signal transmitted by the trigger module.

2. The battery charge / discharge protection circuit according to claim 1, characterized in that: The trigger module includes a diode D1, resistors R1 and R2, and a transistor Q1. The winding port is connected to the anode of the diode D1, and the cathode of the diode D1 is connected to the battery management module. One end of the resistor R1 is connected to the power supply terminal, and the other end of the resistor R1 is connected to the base of the transistor Q1. One end of the resistor R2 is connected to the power supply terminal, and the other end of the resistor R2 is connected to the emitter of the transistor Q1. The emitter of the transistor Q1 is connected to the controlled port, and the collector of the transistor Q1 is connected to the battery management module.

3. The battery charge / discharge protection circuit according to claim 2, characterized in that: The battery management module includes a TC4056A battery management chip, resistors R3 and R4. The battery management chip has an enable terminal and a charging terminal. The cathode of diode D1 is connected to the enable terminal of the battery management chip through resistor R3. The collector of transistor Q1 is connected to the enable terminal of the battery management chip. The enable terminal of the battery management chip is connected to ground through resistor R4. The charging terminal of the battery management chip is connected to the battery port.

4. The battery charge / discharge protection circuit according to claim 1, characterized in that: The battery protection module includes a battery protection chip of model XB8089D, a resistor R5, and a capacitor C1. The battery protection chip is configured with a positive terminal, a negative terminal, and a ground terminal. The ground terminal of the battery protection chip is connected to the ground terminal. The positive terminal of the battery protection chip is connected to the battery port through the resistor R5. The positive terminal of the battery protection chip is also connected to the voltage conversion module through the resistor R5. The negative terminal of the battery protection chip is connected to the battery port. The positive terminal of the battery protection chip is connected to the negative terminal of the battery protection chip through the capacitor C1.

5. A battery charge / discharge protection circuit according to claim 1, characterized in that: The voltage conversion module includes a converter chip of model SCT12A2, resistors R6, R7, and R8, capacitors C2 and C3, inductor L1, and diode D2. The converter chip is configured with an input terminal, an enable terminal, a feedback terminal, an output terminal, a frequency setting terminal, a switching terminal, and a start terminal. The battery protection module is connected to the input terminal and the enable terminal of the converter chip. The start terminal of the converter chip is connected to the switching terminal of the converter chip through capacitor C2. The switching terminal of the converter chip is connected to the battery protection module through inductor L1. The switching terminal of the converter chip is connected to the frequency setting terminal of the converter chip through resistor R6. The output terminal of the converter chip is connected to the positive terminal of diode D2, and the negative terminal of diode D2 is connected to the load port. The output terminal of the converter chip is connected to ground through capacitor C3. The output terminal of the converter chip is connected to ground successively through resistors R7 and R8. The feedback terminal of the converter chip is connected to the connection point of resistors R7 and R8.

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