A circuit for controlling the output of a battery pack by means of input pulses

Abstract

The utility model discloses a kind of circuit for controlling battery pack output by input pulse mode.The utility model circuit includes power conversion circuit, signal conversion circuit and output MOS control circuit three parts;Power conversion circuit is composed of power conversion chip U4, filter capacitor one C8 and voltage dividing resistor one R12 and voltage dividing resistor two R13;Signal conversion circuit is composed of conversion chip U2, isolated optocoupler one U1 and isolated optocoupler two U3, filter capacitor two C2, filter capacitor three C5, filter capacitor four C6 and voltage dividing resistor three R1 and voltage dividing resistor four R2;Output MOS control circuit is composed of MOS tube M1, voltage dividing resistor five R8, voltage dividing resistor six R11.The utility model battery pack output uses input pulse control, compared with using single low level or high level control battery pack output, in complex electromagnetic environment, with the characteristics of high anti-interference.

Description

Technical Field

[0001] This utility model relates to the field of battery pack protection, and more specifically, to a circuit that controls the output of a battery pack by means of input pulses. Background Technology

[0002] With the development of electronic technology, the use of lithium batteries has become increasingly widespread, and the reliability of battery packs has received more and more attention.

[0003] As the complexity and integration of electronic device control circuits increase, the requirements for anti-interference capabilities also become more stringent.

[0004] Lithium-ion batteries require control over their output during use to ensure the electrical load is powered on and off. This means ensuring the battery pack provides output when needed and shuts down when required to do so.

[0005] Therefore, adding output control function to the lithium-ion battery circuit can improve the battery pack's anti-interference ability and solve the problem of reliable battery pack output. Utility Model Content

[0006] The technical problem to be solved by this utility model is to solve the problem that electromagnetic interference may cause false triggering when the battery pack output is achieved by high or low level in conventional circuits, and to provide a circuit that controls the battery pack output by input pulse.

[0007] This utility model discloses a circuit for controlling the output of a battery pack via input pulses. The circuit comprises three parts: a power conversion circuit, a signal conversion circuit, and an output MOS control circuit. The power conversion circuit consists of a power conversion chip U4, a filter capacitor C8, and voltage divider resistors R12 and R13. The signal conversion circuit consists of a conversion chip U2, an isolation optocoupler U1 and U3, a filter capacitor C2, a filter capacitor C5, a filter capacitor C6, and voltage divider resistors R1 and R2. The output MOS control circuit consists of a MOS transistor M1, a voltage divider resistor R8, and a voltage divider resistor R11.

[0008] The power conversion circuit uses power conversion chip U4 to convert the input voltage into the operating voltage required by the signal conversion circuit based on the ratio of voltage divider resistor R12 and voltage divider resistor R13.

[0009] The signal conversion circuit uses signal conversion chip U2 to convert the input pulse of input signal IN into a fixed high voltage. This high voltage drives the output of isolation optocoupler U3, and the output of isolation optocoupler U3 is used to drive the output MOS control circuit.

[0010] The output MOS control circuit uses output control MOS transistor M1 to open and close the output loop. When U3 in the conversion circuit outputs a high voltage, voltage divider resistors R8 and R11 provide a voltage divider signal to M1, M1 conducts, and the battery pack outputs voltage. When the isolation optocoupler U3 in the conversion circuit does not output a high voltage, voltage divider resistors R8 and R11 do not provide a voltage divider signal to M1, M1 does not conduct, and the battery pack does not output voltage.

[0011] As a further technical solution of this utility model: the power conversion chip U4 is model LT3014ES5.

[0012] As a further technical solution of this utility model: the voltage divider resistor R12 and the voltage divider resistor R13 are thick film resistors.

[0013] As a further technical solution of this utility model: the signal conversion chip U2 signal is LM2917.

[0014] As a further technical solution of this utility model: the isolation optocoupler is model U3 EL3H7.

[0015] As a further technical solution of this utility model: the output control MOS transistor M1 is model HSBL020N08.

[0016] As a further technical solution of this utility model: the voltage divider resistor R8 and the voltage divider resistor R11 are thick film resistors.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] The battery pack output of this invention is controlled by input pulses. Compared with using a single low or high level to control the battery pack output, it has the characteristics of high anti-interference in complex electromagnetic environments. Attached Figure Description

[0019] Figure 1 This is the circuit diagram of this utility model;

[0020] Figure 2 This is a schematic diagram of the principle of this utility model. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of this utility model; the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this utility model pertains. The terminology used in this specification of the utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model.

[0022] Please see Figures 1-2 The circuit comprises three parts: a power conversion circuit, a signal conversion circuit, and an output MOS control circuit. The power conversion circuit consists of a power conversion chip U4, a filter capacitor C8, a voltage divider resistor R12, and a voltage divider resistor R13. The signal conversion circuit consists of a conversion chip U2, an isolation optocoupler U1, an isolation optocoupler U3, a filter capacitor C2, a filter capacitor C5, a filter capacitor C6, a voltage divider resistor R1, and a voltage divider resistor R2. The output MOS control circuit consists of a MOS transistor M1, a voltage divider resistor R8, and a voltage divider resistor R11.

[0023] The power conversion circuit uses power conversion chip U4 to convert the input voltage into the operating voltage required by the signal conversion circuit based on the ratio of voltage divider resistor R12 and voltage divider resistor R13.

[0024] The signal conversion circuit uses signal conversion chip U2 to convert the input pulse of input signal IN into a fixed high voltage. This high voltage drives the output of isolation optocoupler U3, and the output of isolation optocoupler U3 is used to drive the output MOS control circuit.

[0025] The output MOS control circuit uses output control MOS transistor M1 to open and close the output loop. When U3 in the conversion circuit outputs a high voltage, voltage divider resistors R8 and R11 provide a voltage divider signal to M1, M1 conducts, and the battery pack outputs voltage. When the isolation optocoupler U3 in the conversion circuit does not output a high voltage, voltage divider resistors R8 and R11 do not provide a voltage divider signal to M1, M1 does not conduct, and the battery pack does not output voltage.

[0026] The power conversion circuit uses power conversion chip U4 to convert the input voltage into the operating voltage of the signal conversion circuit. The signal conversion circuit receives the input pulse signal through IN and converts it into a high-level signal to drive the output of isolation optocoupler U3. The high-level signal output of isolation optocoupler U3 drives M1 in the output MOS control circuit to conduct, thereby realizing the output control of the battery pack.

[0027] P+ is the positive terminal of the discharge port, connected to the positive terminal B+ of the battery pack. The source of the output control MOSFET is connected to the battery pack B-, and the drain is connected to the negative terminal P- of the discharge port.

[0028] As a further technical solution of this utility model: the power conversion chip U4 is model LT3014ES5.

[0029] As a further technical solution of this utility model: the voltage divider resistor R12 and the voltage divider resistor R13 are thick film resistors.

[0030] As a further technical solution of this utility model: the signal conversion chip U2 signal is LM2917.

[0031] As a further technical solution of this utility model: the isolation optocoupler U3 is model EL3H7.

[0032] As a further technical solution of this utility model: the output control MOS transistor M1 is model HSBL020N08.

[0033] As a further technical solution of this utility model: the voltage divider resistor R8 and the voltage divider resistor R11 are thick film resistors.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A circuit for controlling the output of a battery pack via input pulses, characterized in that, The circuit comprises three parts: a power conversion circuit, a signal conversion circuit, and an output MOS control circuit. The power conversion circuit consists of a power conversion chip U4, a filter capacitor C8, a voltage divider resistor R12, and a voltage divider resistor R13. The signal conversion circuit consists of a conversion chip U2, an isolation optocoupler U1, an isolation optocoupler U3, a filter capacitor C2, a filter capacitor C5, a filter capacitor C6, and voltage divider resistors R1 and R2. The output MOS control circuit consists of a MOS transistor M1, a voltage divider resistor R8, and a voltage divider resistor R11. The power conversion circuit uses power conversion chip U4 to convert the input voltage into the operating voltage required by the signal conversion circuit based on the ratio of voltage divider resistor R12 and voltage divider resistor R13. The signal conversion circuit uses signal conversion chip U2 to convert the input pulse of input signal IN into a fixed high voltage. This high voltage drives the output of isolation optocoupler U3, and the output of isolation optocoupler U3 is used to drive the output MOS control circuit. The output MOS control circuit uses output control MOS transistor M1 to open and close the output loop. When U3 in the conversion circuit outputs a high voltage, voltage divider resistors R8 and R11 provide a voltage divider signal to M1, M1 conducts, and the battery pack outputs voltage. When the isolation optocoupler U3 in the conversion circuit does not output a high voltage, voltage divider resistors R8 and R11 do not provide a voltage divider signal to M1, M1 does not conduct, and the battery pack does not output voltage.

2. The circuit for controlling the battery pack output via input pulses according to claim 1, characterized in that, The power conversion chip U4 is model LT3014ES5.

3. The circuit for controlling the battery pack output via input pulses according to claim 1, characterized in that, The voltage divider resistors R12 and R13 are thick-film resistors.

4. The circuit for controlling the battery pack output via input pulses according to claim 1, characterized in that, The signal conversion chip U2 uses the LM2917.

5. The circuit for controlling the battery pack output via input pulses according to claim 1, characterized in that, The isolation optocoupler is model U3 EL3H7.

6. The circuit for controlling the battery pack output via input pulses according to claim 1, characterized in that, The output control MOSFET M1 is model HSBL020N08.

7. The circuit for controlling the battery pack output via input pulses according to claim 1, characterized in that, The voltage divider resistors R8 and R11 are thick-film resistors.

Images