CN218888200U

CN218888200U - High-power non-stop battery switching circuit

Info

Publication number: CN218888200U
Application number: CN202222378005.0U
Authority: CN
Inventors: 王祯鑫; 李海洋
Original assignee: Dalian Institute of Chemical Physics of CAS
Current assignee: Dalian Institute of Chemical Physics of CAS
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2023-04-18
Anticipated expiration: 2032-09-07

Abstract

The utility model provides a high power does not shut down quick-witted battery switching circuit, include: the device comprises a charging module M1, an internal battery BAT1, a relay K1, a freewheeling diode D1, an external battery position detection switch S1, pull-up resistors R1 and R2, current-limiting resistors R3 and R4, and power MOSFET (metal-oxide-semiconductor field effect transistor) tubes Q1, Q2, Q3 and Q4. The utility model discloses device built-in module and the built-in battery switching circuit that charges of circuit according to outside battery position state automatic judgement power supply type, ensures to carry out seamless incessant high power supply between AC power supply, external battery power supply and the inside power supply three, ensures the consumer continuous operation.

Description

High-power non-shutdown battery switching circuit

Technical Field

The utility model relates to a power management circuit technical field particularly, especially relates to a high power does not shut down battery switching circuit.

Background

A battery powered system with good performance is a necessary guarantee and an indispensable key component for the normal and stable operation of portable laboratory equipment.

At present, most of devices powered by batteries do not have the capability of directly replacing the batteries without external alternating current power supply, shutdown operation is required during battery replacement, the requirement of long-time non-shutdown application of portable high-power devices in a mobile state cannot be met, and the application scene of the high-power devices is greatly limited.

SUMMERY OF THE UTILITY MODEL

In light of the above-mentioned technical problems of the background art, a high power shutdown battery switching circuit is provided. The utility model provides a high power does not shut down battery switching circuit can carry out the seamless switching of alternating current power supply, built-in battery power supply and external battery power supply under the state of not shutting down, can guarantee under the condition that does not have external alternating current power supply, the uninterrupted operation of high power equipment when changing external battery.

The utility model discloses a technical means as follows:

a high power non-stop battery switching circuit comprising:

the device comprises a charging module M1, an internal battery BAT1, a relay K1, a freewheeling diode D1, an external battery position detection switch S1, pull-up resistors R1 and R2, current-limiting resistors R3 and R4, and power MOSFET (metal-oxide-semiconductor field effect transistor) tubes Q1, Q2, Q3 and Q4;

the negative electrode of the freewheeling diode D1 is connected to the 1 st pin of the relay K1, is also connected to the power input pin of the charging module M1, and is also connected to an external power supply DC24V; the anode of the freewheeling diode D1 is connected to the No. 2 pin of the relay K1 and is also connected to the cathode of a system power supply; the No. 3 and No. 4 pins of the relay K1 are connected together and are simultaneously connected to the No. 1 port of the current-limiting resistor R3, and the No. 5 pin of the relay K1 is connected to the negative electrode of a system power supply;

the No. 2 port of the current limiting resistor R3 is connected to the No. 1 port of the pull-up resistor R1, and is simultaneously connected to the No. 1 pin of the power MOSFET Q1 and is simultaneously connected to the No. 1 pin of the power MOSFET Q2.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses a relay detects the external switch power supply, when having outside alternating current power supply, carries out mains operated by outside alternating current power supply to the system to the built-in battery supply circuit of disconnection charges to built-in battery simultaneously.

2. The utility model adopts the position detection switch of the external battery to detect whether the external battery exists, when the external battery is replaced, the external battery is pulled out and is powered by the internal battery at the moment; when the external battery is plugged, the external battery is switched to supply power.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a circuit diagram of the high power non-stop battery switching circuit of the present invention.

The charging device comprises a charging module M1, a BAT1, a freewheeling diode D1, a relay K1, an external battery position detection switch S1, power MOSFET (metal-oxide-semiconductor field effect transistor) tubes Q1, Q2, Q3 and Q4, pull-up resistors R1 and R2, and current-limiting resistors R3 and R4, wherein the charging module M1 is a built-in battery, the freewheeling diode BAT1 is a built-in battery, the relay K1 is a relay, the power MOSFET tubes S1 are external battery position detection switches, and the power MOSFET tubes R1, Q2, Q3 and Q4 are power MOSFET tubes.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in the figure, the utility model provides a

Example 1

A high-power uninterrupted power supply battery switching circuit is characterized in that a 16.8V5A lithium battery charging module is selected for M1, 4 strings of high-rate lithium batteries are selected for BAT1, a 1N4148 type diode is selected for D1, a G5V-1/24V type relay is selected for K1, IRF4905 type power MOSFET tubes are selected for Q1 to Q4, R1 and R2 are selected to be 100K omega, R3 and R4 are selected to be 100 omega, and a V-153-1C/25 type switch is selected for S1.

When external alternating current power supply exists, the switching power supply outputs DC24V voltage, the relay K1 acts, the backflow prevention circuit composed of the power MOSFET tubes Q1 and Q2 is in a cut-off state, the power supply circuit of the built-in battery BAT1 is cut off, meanwhile, the DC24V supplies power to the charging module M1, the built-in battery BAT1 is charged, and meanwhile, the DC24V power supply supplies power to the outside.

When the external alternating current power supply is cut off, the switching power supply does not provide DC24V voltage, the relay K1 is closed, the backflow prevention circuit composed of the power MOSFET tubes Q1 and Q2 is in a conducting state, the voltage of the built-in battery BAT1 is applied to the left side of the backflow prevention circuit composed of the power MOSFET tubes Q3 and Q4 through the backflow prevention circuit composed of the power MOSFET tubes Q1 and Q2, and the built-in battery BAT1 is in a standby power supply state.

When an external battery exists, the external battery detection switch S1 is in a conducting state, the backflow prevention circuit composed of the power MOSFET tubes Q3 and Q4 is in a stopping state, and the external battery supplies power at the moment.

When external battery electric quantity is not enough and needs to be changed, external battery extracts, and external battery detection switch is in the off-state, and the anti-backflow circuit that comprises power MOSFET pipe Q3 and Q4 this moment is in the on-state, and built-in battery BAT1 voltage flows through Q1 to Q4, for the outside supplies power.

When the external battery is inserted after being replaced, the external battery detection switch is switched on, the backflow prevention circuit formed by the power MOSFET tubes Q3 and Q4 is cut off, the power supply of the internal battery BAT1 is cut off, and meanwhile, the external battery supplies power to the outside, so that the switching function of the battery without stopping the machine is completed.

The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.

In the above embodiments of the present invention, the descriptions of the embodiments have their respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A high power non-stop battery switching circuit, comprising:

the negative electrode of the freewheeling diode D1 is connected to the 1 st pin of the relay K1, is also connected to the power input pin of the charging module M1 and is also connected to an external power supply DC24V; the anode of the freewheeling diode D1 is connected to the No. 2 pin of the relay K1 and is also connected to the cathode of a system power supply; the No. 3 and No. 4 pins of the relay K1 are connected together and are simultaneously connected to the No. 1 port of the current limiting resistor R3, and the No. 5 pin of the relay K1 is connected to the negative electrode of a system power supply;

2. The high-power non-stop battery switching circuit according to claim 1,

a 2 nd pin of the power MOSFET Q1 is connected to the anode of a built-in battery BAT1 and is also connected to an output port of the charging module M1, and the cathode of the charging module is connected to the cathode of a system power supply; a 3 rd pin of the power MOSFET Q1 is connected to a 3 rd pin of the power MOSFET Q2 and is simultaneously connected to a 2 nd port of a pull-up resistor R1; the No. 2 pin of the power MOSFET Q2 is connected to the No. 2 pin of the power MOSFET Q3; the 1 st pin of the power MOSFET Q3 is connected to the 1 st pin of the power MOSFET Q4, and is simultaneously connected to the 1 st port of the pull-up resistor R2 and is simultaneously connected to the 2 nd port of the current-limiting resistor R4; and the No. 3 pin of the power MOSFET Q3 is connected to the No. 3 pin of the power MOSFET Q4 and is simultaneously connected to the No. 2 port of the pull-up resistor R2.

3. The high-power non-stop battery switching circuit according to claim 1,

the 1 st port of the current-limiting resistor R4 is connected to the 3 rd pin of the external battery position detection switch S1, and the 2 nd pin of the external battery position detection switch S1 is connected to the negative electrode of the system power supply.

4. The high-power shutdown battery switching circuit according to any one of claims 1 or 2, wherein the 2 nd pin of the power MOSFET Q4 is a power output port of the circuit and is connected to an external battery anode.

5. The high-power uninterruptible battery switching circuit according to claim 1, wherein: the relay K1 controls the power MOSFET Q1 and the power MOSFET Q2 to be switched on and off by monitoring whether the alternating current power supply is switched on or not, and further controls the built-in battery BAT1 to supply power or not.

6. The high-power uninterruptible battery switching circuit according to claim 1, wherein: and the external battery position detection switch S1 monitors whether the external battery BAT2 is accurately accessed, so that the power MOSFET (metal oxide semiconductor field effect transistor) tubes Q3 and Q4 are controlled to be switched on and off, and further the internal battery BAT1 is controlled to supply power.