CN217282307U

CN217282307U - Multi-battery high-efficiency charging and discharging circuit

Info

Publication number: CN217282307U
Application number: CN202220730530.1U
Authority: CN
Inventors: 卢建乔
Original assignee: Yuyao Tailian Lighting Electric Co ltd
Current assignee: Yuyao Tailian Lighting Electric Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-08-23
Anticipated expiration: 2032-03-31

Abstract

The utility model relates to a many batteries high efficiency charge-discharge circuit, including LOAD LOAD1, control chip U1, a plurality of switch tubes, a plurality of batteries and at least one charging socket, battery or charging socket all connect control chip U1's power supply pin through voltage stabilizing circuit, the positive pole of each battery all is connected to LOAD LOAD 1's positive pole through two switch tubes that establish ties, and two switch tubes that establish ties are connected to control chip U1's corresponding pin through control switch tube; the charging sockets are respectively connected to corresponding batteries through corresponding switch tubes, and the switch tubes are connected to corresponding pins of the control chip U1 through second control switch tubes; the corresponding pin of the control chip U1 is also connected to each battery through a voltage detection circuit, and the control chip U1 selects the corresponding battery to charge and discharge through the voltage value of each battery. The utility model discloses a switch tube realizes the isolation of a plurality of batteries, controls the order of discharging through control chip U1, and efficiency improves greatly.

Description

Multi-battery high-efficiency charging and discharging circuit

Technical Field

The utility model relates to a battery charge and discharge technical field, more specifically say, and more specifically say, relate to a many battery high efficiency charge and discharge circuit.

Background

In order to improve the convenience of the lighting lamp, the power supply mode of the lamp is usually designed into multiple modes so as to meet the use requirements of different occasions and increase the applicability. In some lighting lamps with various power supply modes, a plurality of batteries are generally arranged, and because a plurality of paths of batteries supply power to the lamp, the batteries are ensured not to be charged and discharged mutually so as to ensure safety and improve efficiency. The isolation mode commonly used at present is to carry out isolation through a diode, but because the forward voltage drop VF value of the diode conduction is large, the loss is too large; moreover, the charging and discharging sequence among a plurality of batteries of the existing lighting lamp is usually rigid, generally set by people, and cannot be intelligently adjusted.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a many batteries high efficiency charge-discharge circuit, this circuit can make a plurality of batteries discharge or charge in order.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

the multi-battery high-efficiency charging and discharging circuit comprises a LOAD LOAD1, a control chip U1, a plurality of switching tubes, a plurality of batteries and at least one charging socket, wherein the batteries or the charging sockets are connected with a power supply pin of the control chip U1 through a voltage stabilizing circuit, the anode of each battery is connected to the anode of the LOAD LOAD1 through two switching tubes connected in series, the two switching tubes connected in series are connected to the control switching tubes, and the control switching tubes are connected to corresponding pins of the control chip U1; the charging sockets are connected to corresponding batteries through corresponding switch tubes respectively, the switch tubes are connected with corresponding second control switch tubes, and the second control switch tubes are connected to corresponding pins of a control chip U1; and corresponding pins of the control chip U1 are also connected to each battery through a voltage detection circuit, and the control chip U1 selects the corresponding battery to charge and discharge through the voltage value of each battery.

As a preferable scheme: two switch tubes connected in series with the positive electrode of the battery are PMOS tubes, and the control switch tube is an MOS tube.

As a preferable scheme: and diodes with protection function are respectively connected in parallel on the two PMOS tubes.

As a preferable scheme: the switch tube connected with the charging socket is also a PMOS tube, and the second control switch tube is an NPN triode or an NMOS tube.

As a preferable scheme: the charging socket is two, and one of them is the socket of matching the charger, and another is the socket of matching solar energy power generation component.

As a preferable scheme: the LOAD LOAD 1's ground pin still is equipped with three parallelly connected resistance and the MOS pipe of establishing ties with three parallelly connected resistance on, and the MOS pipe is connected to the corresponding pin of control chip U1.

As a preferable scheme: and resistors are also connected in series between the positive electrode and the negative electrode of the charging socket, and a voltage stabilizing diode is also connected in parallel on one of the resistors.

As a preferable scheme: a PMOS tube and a triode are further arranged between one of the batteries and the voltage acquisition pin of the control chip U1, and the triode is connected to the corresponding pin of the control chip U1.

Compared with the prior art, the beneficial effects of the utility model are that:

the circuit of the utility model adopts the switch tube to realize the isolation of a plurality of batteries, controls the discharge sequence through the control chip U1, and the control chip U1 can collect the voltage information of a plurality of power supplies and discharge according to the electric quantity high-low sequence; certainly, one path of battery can be set to discharge firstly according to the requirement, and the other path of battery is discharged after the discharge is finished; and because the internal resistance of the switching tube is very small, the efficiency can be greatly improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

Fig. 1 is a schematic diagram of two battery charging circuits according to an embodiment of the present invention;

fig. 2 is a schematic diagram of two battery discharge circuits according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a control chip of the charging and discharging circuit according to the embodiment of the present invention;

fig. 4 is a schematic diagram of voltage detection of two batteries according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a voltage stabilizing circuit according to an embodiment of the present invention.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, elements, and/or combinations thereof, unless the context clearly indicates otherwise.

Furthermore, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The invention will be further explained with reference to the following embodiments and drawings:

the multi-battery high-efficiency charging and discharging circuit shown in fig. 1 to fig. 5 includes a LOAD1, a control chip U1, a plurality of switching tubes, a plurality of batteries, and at least one charging socket, wherein the batteries or the charging sockets are connected to a power supply pin of the control chip U1 through a voltage stabilizing circuit, an anode of each battery is connected to an anode of the LOAD1 through two switching tubes connected in series, the two switching tubes connected in series are connected to the control switching tube, and the control switching tube is connected to a corresponding pin of the control chip U1; the charging sockets are connected to corresponding batteries through corresponding switch tubes respectively, the switch tubes are connected with corresponding second control switch tubes, and the second control switch tubes are connected to corresponding pins of a control chip U1; the corresponding pin of the control chip U1 is also connected to each battery through a voltage detection circuit, and the control chip U1 selects the corresponding battery to supply power to the LOAD1 according to the voltage value of each battery.

Two switch tubes connected in series with the positive electrode of the battery are PMOS tubes, and the control switch tube is an MOS tube. And the two PMOS tubes are respectively connected with diodes with the protection function in parallel. The switch tube connected with the charging socket is also a PMOS tube, and the second control switch tube is an NPN triode or an NMOS tube.

A PMOS tube and a triode are further arranged between one of the batteries and the voltage acquisition pin of the control chip U1, and the triode is connected to the corresponding pin of the control chip U1.

The charging socket is two, and one of them is the socket of matching the charger, and another is the socket of matching solar energy power generation component. And resistors are also connected in series between the positive electrode and the negative electrode of the charging socket, and a voltage stabilizing diode is also connected in parallel on one of the resistors.

The grounding pin of the LOAD1 is also provided with three resistors connected in parallel and an MOS transistor connected in series with the three resistors connected in parallel, and the MOS transistor is connected to a corresponding pin of the control chip U1.

The utility model discloses a circuit is applicable to the charge-discharge of 2 and 3 batteries and more batteries. The double PMOS replaces the diode for isolation, so that the power loss can be reduced, the service efficiency of the battery is improved, and the working time is prolonged.

Two rechargeable batteries and a two-way discharge circuit are shown in fig. 1, but could be used for more than one way. BAT1 and BAT2 two rechargeable batteries: the battery can be the internal battery of the lamp, and can also be a detachable battery such as a charger, an electric tool battery pack and the like.

The discharge circuit1 is a first discharge circuit that passes the electricity of the first battery BAT2 through two PMOS: q11, Q4 discharge LOAD LOAD 1; the discharge circuit2 is used for enabling the second battery BAT1 to pass through two PMOS circuits: q10, Q6 discharge LOAD 1.

Because there are multiple batteries to supply power to the lamp, it is necessary to ensure that the batteries are not charged and discharged mutually to ensure safety and improve efficiency. The circuit can set one path of battery to discharge firstly and then discharge the other path of battery after discharging according to requirements; the discharge can be performed according to the high and low electric quantity sequence; the conventional isolation mode is to perform isolation through a diode, and because the forward voltage drop VF value of the diode conduction is large, the loss is too large. The circuit adopts two PMOS to realize isolation, and controls the discharge sequence through a control chip U1; because the internal resistance of the MOS is very small, the efficiency can be greatly improved.

As shown in fig. 1 and 3: when BAT1 needs to discharge to LOAD1, the control chip U1 enables B1_ K to be high and B2_ K to be low, so that BAT1 discharges to LOAD1 through Q10 and Q6; if let BAT2 discharge LOAD1, B1_ K is low, B2_ K is high, so BAT2 discharges LOAD1 through Q11 and Q4; d7, D8, D2 and D9 are respectively used for protecting Q11, Q4, Q10 and Q6 of the PMOS, and the D7, the D8, the D2 and the D9 are not added according to practical application situations.

Shown in fig. 2 are two rechargeable batteries and a two-way charging circuit, Charg circuit 1: is the 1 st way charging circuit. CD _1 high, CD _2 low when BAT1 is charged; CD _1 is low and CD _2 is high when BAT2 is charged. Charg circuit 2: is the 2 nd charging circuit. CD _1a high, CD _2 low when BAT1 is charged; CD _1a is low and CD _2 is high when BAT2 is charged. The electric energy source of the charging circuit can be a solar power generation component, and can also be a charger or other electricity storage equipment.

The electric current on the load can descend along with the electric quantity decline of battery, and then makes the luminance of lamps and lanterns descend, the utility model discloses in compensate the electric current that the electric quantity decline arouses through control chip U1 and reduce. The load circuit is not limited to a resistance step-down circuit, can be made into a DC-DC step-down circuit or DC-DC boosted voltage, and can be used for reducing the voltage after DC-DC boosting and is suitable for wider loads.

The circuit of the utility model can realize the charging and discharging of the battery by using the same interface.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the spirit and scope of the present invention, and that any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims

1. Many batteries high efficiency charge-discharge circuit, its characterized in that: the charging device comprises a LOAD1, a control chip U1, a plurality of switching tubes, a plurality of batteries and at least one charging socket, wherein the batteries or the charging sockets are connected with a power supply pin of the control chip U1 through a voltage stabilizing circuit, the anode of each battery is connected to the anode of the LOAD LOAD1 through two switching tubes connected in series, the two switching tubes connected in series are connected to the control switching tubes, and the control switching tubes are connected to corresponding pins of the control chip U1; the charging sockets are connected to corresponding batteries through corresponding switch tubes respectively, the switch tubes are connected with corresponding second control switch tubes, and the second control switch tubes are connected to corresponding pins of a control chip U1; and corresponding pins of the control chip U1 are also connected to each battery through a voltage detection circuit, and the control chip U1 selects the corresponding battery to charge and discharge through the voltage value of each battery.

2. The multi-cell high efficiency charge and discharge circuit of claim 1, wherein: two switch tubes connected in series with the positive electrode of the battery are PMOS tubes, and the control switch tube is an MOS tube.

3. The multi-cell high efficiency charge and discharge circuit of claim 2, wherein: and the two PMOS tubes are respectively connected with diodes with the protection function in parallel.

4. The multi-cell high efficiency charge and discharge circuit of claim 1, wherein: the switch tube connected with the charging socket is also a PMOS tube, and the second control switch tube is an NPN triode or an NMOS tube.

5. The multi-cell high efficiency charge and discharge circuit of claim 4, wherein: the charging socket is two, and one of them is the socket of matching the charger, and another is the socket of matching solar energy power generation component.

6. The multi-cell high efficiency charge and discharge circuit of claim 1, wherein: the LOAD LOAD 1's ground pin still is equipped with three parallelly connected resistance and the MOS pipe of establishing ties with three parallelly connected resistance on, and the MOS pipe is connected to the corresponding pin of control chip U1.

7. The multi-cell high efficiency charge and discharge circuit of claim 1, wherein: and resistors are also connected in series between the positive electrode and the negative electrode of the charging socket, and a voltage stabilizing diode is also connected in parallel on one of the resistors.

8. The multi-cell high efficiency charge and discharge circuit of claim 1, wherein: a PMOS tube and a triode are further arranged between one of the batteries and the voltage acquisition pin of the control chip U1, and the triode is connected to the corresponding pin of the control chip U1.