CN202712892U - Battery management system and load detection circuit thereof - Google Patents

The utility model, which is suitable for the battery control technology field, provides a battery management system and a load detection circuit thereof. The battery management system comprises the load detection circuit that is formed by a diode D1, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, and a voltage regulator diode ZD1. Whether a load is accessed between a positive power terminal of a battery set and a source electrode of a charging MOS tube is determined so as to correspondingly output a high level or a low level by the cathode of the voltage regulator diode ZD1 to a main controller; and the main controller controls the connection and disconnection of the charging MOS tube and a discharging MOS tube by an MOS tube drive circuit. Therefore, the main controller can rapidly control the whole battery management system to enter a dormant state when there is no load is accessed so as to reduce the power consumption and prolong the standby time, thereby solving problems that the access state of the load can not be determined as well as the response speed is slow and the power consumption is high according to the existing battery management system.

A kind of battery management system and load detecting circuit thereof

Technical field

The utility model belongs to battery control technology field, relates in particular to a kind of battery management system and load detecting circuit thereof.

Background technology

At present, extensive use along with each class of electronic devices, the electric weight of power supply is supplied with and also need to be switched between charged state, discharge condition, resting state and holding state along with the access state of load, thereby reaches electrical energy saving with the stand-by time of the battery management system of lengthening power supply inside.

Yet existing battery management system can not be fast and is distinguished clearly above four kinds of operating states, thereby makes its continuous firing and accumulator electric-quantity is caused waste under resting state and holding state, has strengthened the power consumption of power supply.Therefore, there is the access state that can't judge load in existing battery management system and response speed is slow and the high problem of power consumption.

The utility model content

The purpose of this utility model is to provide a kind of load detecting circuit of battery management system, is intended to solve that existing battery management system is existing can't judge the access state of load and response speed is slow and the high problem of power consumption.

The utility model is to realize like this, a kind of load detecting circuit of battery management system, be connected with the master controller in the battery management system, described master controller is according to the break-make of voltage control charging metal-oxide-semiconductor and the discharge metal-oxide-semiconductor of the output of described load detecting circuit, the source electrode of the described charging metal-oxide-semiconductor of input termination of described load detecting circuit, described load detecting circuit comprises:

Diode D1, resistance R 1, resistance R 2, resistance R 3, capacitor C 1 and voltage stabilizing didoe ZD1;

The anode of described diode D1 is the input of described load detecting circuit, described resistance R 1 is connected between the first end of the negative electrode of described diode D1 and described resistance R 2, the first end of the second end of described resistance R 2, the first end of described resistance R 3 and described capacitor C 1 is connected to the negative electrode of described voltage stabilizing didoe ZD1 altogether, and the negative electrode of described voltage stabilizing didoe ZD1 is the output of described load detecting module, and the second end of the anode of described voltage stabilizing didoe ZD1, described resistance R 3 and the second end of described capacitor C 1 are connected to ground altogether.

Another purpose of the present utility model also is to provide a kind of battery management system, comprise master controller, described battery management system also comprises load detecting circuit, described load detecting circuit is connected with described master controller, described master controller is according to the break-make of voltage control charging metal-oxide-semiconductor and the discharge metal-oxide-semiconductor of the output of described load detecting circuit, the source electrode of the described charging metal-oxide-semiconductor of input termination of described load detecting circuit is characterized in that described load detecting circuit comprises:

Diode D1, resistance R 1, resistance R 2, resistance R 3, capacitor C 1 and voltage stabilizing didoe ZD1;

The anode of described diode D1 is the input of described load detecting circuit, described resistance R 1 is connected between the first end of the negative electrode of described diode D1 and described resistance R 2, the first end of the second end of described resistance R 2, the first end of described resistance R 3 and described capacitor C 1 is connected to the negative electrode of described voltage stabilizing didoe ZD1 altogether, and the negative electrode of described voltage stabilizing didoe ZD1 is the output of described load detecting module, and the second end of the anode of described voltage stabilizing didoe ZD1, described resistance R 3 and the second end of described capacitor C 1 are connected to ground altogether.

In the utility model, comprise described diode D1 by in battery management system, adopting, described resistance R 1, described resistance R 2, described resistance R 3, the load detecting circuit of described capacitor C 1 and described voltage stabilizing didoe ZD1, whether judge has load access between the source electrode of the positive power source terminal of battery pack and charging metal-oxide-semiconductor and correspondingly from the negative electrode output high level of voltage stabilizing didoe ZD1 or low level to described master controller, then controlled the break-make of described charging metal-oxide-semiconductor and described discharge metal-oxide-semiconductor by the metal-oxide-semiconductor drive circuit by master controller, and then reach when non-loaded access, can make described master controller fast the whole battery management system of control enter resting state reducing power consumption and to increase stand-by time, existing battery management system is existing can't judge the access state of load and response speed is slow and the high problem of power consumption thereby solved.

Description of drawings

Fig. 1 is the circuit structure diagram of the load detecting circuit of the battery management system that provides of the utility model embodiment.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.

In the utility model embodiment, comprise diode D1 by in battery management system, adopting, resistance R 1, resistance R 2, resistance R 3, the load detecting circuit of capacitor C 1 and voltage stabilizing didoe ZD1, whether judge has load access between the source electrode of the positive power source terminal of battery pack and charging metal-oxide-semiconductor and correspondingly from the negative electrode output high level of voltage stabilizing didoe ZD1 or low level to master controller, then by the break-make of master controller by metal-oxide-semiconductor drive circuit control charging metal-oxide-semiconductor and discharge metal-oxide-semiconductor, so reach when non-loaded access, can make master controller fast the whole battery management system of control enter resting state with the reduction power consumption and increase stand-by time.

Fig. 1 shows the circuit structure of the load detecting circuit of the battery management system that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model, and details are as follows:

Diode D1, resistance R 1, resistance R 2, resistance R 3, capacitor C 1 and voltage stabilizing didoe ZD1;

Diode D1, resistance R 1, resistance R 2, resistance R 3, capacitor C 1 and voltage stabilizing didoe ZD1;

In the utility model embodiment, comprise diode D1 by in battery management system, adopting, resistance R 1, resistance R 2, resistance R 3, the load detecting circuit of capacitor C 1 and voltage stabilizing didoe ZD1, whether judge has load access between the source electrode of the positive power source terminal of battery pack and charging metal-oxide-semiconductor and correspondingly from the negative electrode output high level of voltage stabilizing didoe ZD1 or low level to master controller, then by the break-make of master controller by metal-oxide-semiconductor drive circuit control charging metal-oxide-semiconductor and discharge metal-oxide-semiconductor, and then reach when non-loaded access, can make master controller fast the whole battery management system of control enter resting state reducing power consumption and to increase stand-by time, existing battery management system is existing can't judge the access state of load and response speed is slow and the high problem of power consumption thereby solved.

The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.