CN214337605U

CN214337605U - Single-double battery charging self-recognition circuit and electronic equipment

Info

Publication number: CN214337605U
Application number: CN202120160693.6U
Authority: CN
Inventors: 丁观平
Original assignee: Shenzhen Haipai Technology Co ltd
Current assignee: Shenzhen Haipai Technology Co ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-10-01
Anticipated expiration: 2031-01-20

Abstract

The utility model discloses a single or double battery charging self-recognition circuit and electronic equipment, the single or double battery charging self-recognition circuit comprises a battery detection circuit, a control circuit, a single battery charging circuit, a double battery charging circuit and a battery circuit with at least two battery loading positions, the battery detection circuit is respectively electrically connected with the output end of the battery circuit and the input end of the control circuit; the output end of the control circuit is respectively and electrically connected with the input end of the single-battery charging circuit and the input end of the double-battery charging circuit; the output end of the single battery charging circuit and the output end of the double battery charging circuit are both electrically connected with the input end of the battery circuit. The utility model discloses a single or double-battery charging self-identification circuit can solve because the built-in integrated circuit that charges of current electronic equipment can only charge to single section battery or two section batteries alone, and leads to the user to use inconvenient and have the problem of potential safety hazard.

Description

Single-double battery charging self-recognition circuit and electronic equipment

Technical Field

The utility model belongs to the technical field of charging device, concretely relates to single-double battery charges from identification circuit and electronic equipment.

Background

Compared with the traditional electronic equipment, the existing electronic equipment powered by two batteries can be compatible with a single battery or two batteries for use, but the existing electronic equipment powered by two batteries only comprises a charging integrated circuit specially aiming at the single battery or the two batteries, for example, the electronic equipment internally provided with the charging integrated circuit of the single battery cannot be charged under the condition that the two batteries are placed in the equipment, and the electronic equipment internally provided with the charging integrated circuit of the two batteries cannot be charged under the condition that the single battery is placed in the equipment, so that the electronic equipment is very inconvenient to use, and if the charging mode of the charging integrated circuit internally arranged in the electronic equipment is not matched with the number of the batteries placed in the equipment, the electronic equipment can be damaged during charging, and great potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above disadvantages of the prior art, an object of the present invention is to provide a single-dual battery charging self-identification circuit, which aims to solve the problem that the user is inconvenient to use and has potential safety hazard due to the fact that the existing charging integrated circuit built in the electronic device can only charge the single battery or the dual batteries individually.

The utility model discloses a reach its purpose, the technical scheme who adopts as follows:

a single-double battery charging self-recognition circuit comprises a battery detection circuit, a control circuit, a single battery charging circuit, a double battery charging circuit and a battery circuit with at least two battery loading positions; wherein the content of the first and second substances,

the battery detection circuit is respectively and electrically connected with the output end of the battery circuit and the input end of the control circuit; the battery detection circuit is used for outputting a first detection signal to the control circuit when detecting that the battery circuit contains a single battery, and outputting a second detection signal to the control circuit when detecting that the battery circuit contains a double battery;

the output end of the control circuit is respectively and electrically connected with the input end of the single-battery charging circuit and the input end of the double-battery charging circuit; the control circuit is used for outputting a first charging signal to the single-battery charging circuit when receiving the first detection signal, and outputting a second charging signal to the double-battery charging circuit when receiving the second detection signal;

the output end of the single battery charging circuit is electrically connected with the input end of the battery circuit, and the single battery charging circuit is used for charging the battery circuit when receiving the first charging signal;

the output end of the double-battery charging circuit is electrically connected with the input end of the battery circuit, and the double-battery charging circuit is used for charging the battery circuit when receiving the second charging signal.

Further, the battery detection circuit comprises a first detection circuit and a second detection circuit, the first detection circuit comprises a first resistor and a second resistor, and the second detection circuit comprises a third resistor and a fourth resistor;

one end of the second resistor is electrically connected with the output end of the battery circuit, the other end of the second resistor is respectively electrically connected with the input end of the control circuit and one end of the first resistor, and the other end of the first resistor is grounded;

one end of the fourth resistor is electrically connected with the output end of the battery circuit, the other end of the fourth resistor is respectively electrically connected with the input end of the control circuit and one end of the third resistor, and the other end of the third resistor is grounded.

Furthermore, the single-double battery charging self-identification circuit also comprises a single-battery reverse connection protection switch and/or a double-battery reverse connection protection switch; wherein the content of the first and second substances,

the output end of the single battery charging circuit is electrically connected with the input end of the battery circuit through the single battery reverse connection protection switch;

the output end of the double-battery charging circuit is electrically connected with the input end of the battery circuit through the double-battery reverse connection protection switch.

Further, the single-battery reverse connection protection switch comprises a first field effect transistor, and the double-battery reverse connection protection switch comprises a second field effect transistor; wherein the content of the first and second substances,

the source electrode of the first field effect transistor is electrically connected with the output end of the single battery charging circuit, the grid electrode of the first field effect transistor is electrically connected with the output end of the battery circuit, and the drain electrode of the first field effect transistor is electrically connected with the input end of the battery circuit;

the source electrode of the second field effect tube is electrically connected with the output end of the double-battery charging circuit, the grid electrode of the second field effect tube is electrically connected with the output end of the battery circuit, and the drain electrode of the second field effect tube is electrically connected with the input end of the battery circuit.

Furthermore, the single-double battery charging self-identification circuit also comprises a charging interface and a charging detection circuit; wherein the content of the first and second substances,

the output end of the charging interface is respectively and electrically connected with the input end of the charging detection circuit, the input end of the single-battery charging circuit and the input end of the double-battery charging circuit;

the output end of the charging detection circuit is electrically connected with the input end of the control circuit, and the charging detection circuit is used for outputting a charging starting signal to the control circuit when detecting that the output voltage of the charging interface exceeds a preset voltage threshold value, so that the control circuit outputs the first charging signal to the single-battery charging circuit or outputs the second charging signal to the double-battery charging circuit.

Further, the charge detection circuit includes a fifth resistor and a sixth resistor; one end of the sixth resistor is electrically connected with the output end of the charging interface, the other end of the sixth resistor is electrically connected with the input end of the control circuit and one end of the fifth resistor respectively, and the other end of the fifth resistor is grounded.

Furthermore, the single-double battery charging self-identification circuit also comprises a single-battery charging switch and/or a double-battery charging switch, wherein,

the output end of the charging interface is electrically connected with the input end of the single-battery charging circuit through the single-battery charging switch, the single-battery charging switch is electrically connected with the output end of the control circuit, and the single-battery charging switch is used for changing from an open state to a closed state when receiving the first charging signal sent by the control circuit;

the output end of the charging interface is electrically connected with the input end of the double-battery charging circuit through the double-battery charging switch, the double-battery charging switch is electrically connected with the output end of the control circuit, and the double-battery charging switch is used for changing from an open state to a closed state when receiving the second charging signal sent by the control circuit.

Furthermore, the single-battery charging switch comprises a third field effect transistor and a fourth field effect transistor, and the double-battery charging switch comprises a fifth field effect transistor and a sixth field effect transistor; wherein the content of the first and second substances,

the source electrode of the third field effect transistor is grounded, the grid electrode of the third field effect transistor is electrically connected with the output end of the control circuit, the drain electrode of the third field effect transistor is electrically connected with the grid electrode of the fourth field effect transistor, the source electrode of the fourth field effect transistor is electrically connected with the output end of the charging interface, and the drain electrode of the fourth field effect transistor is electrically connected with the input end of the single-battery charging circuit;

the source electrode of the fifth field effect transistor is grounded, the grid electrode of the fifth field effect transistor is electrically connected with the output end of the control circuit, the drain electrode of the fifth field effect transistor is electrically connected with the grid electrode of the sixth field effect transistor, the source electrode of the sixth field effect transistor is electrically connected with the output end of the charging interface, and the drain electrode of the sixth field effect transistor is electrically connected with the input end of the double-battery charging circuit.

Furthermore, the single-double battery charging self-identification circuit further comprises a low-voltage linear voltage stabilizer, the output end of the low-voltage linear voltage stabilizer is electrically connected with the input end of the control circuit, the input end of the low-voltage linear voltage stabilizer is electrically connected with the output end of the battery circuit, and the grounding end of the low-voltage linear voltage stabilizer is grounded.

Correspondingly, the utility model discloses still provide an electronic equipment, include as aforementioned single two battery charging self-identification circuit.

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

the utility model provides a single or double-battery charging self-identification circuit, detect the battery quantity in the battery circuit through set up battery detection circuit in charging circuit, and send the testing result to control circuit, make control circuit can come to charge single section battery or double-battery in the battery circuit with the corresponding single section battery charging circuit of battery festival number or double-battery charging circuit according to the testing result control, the automatic switch-over of battery charging mode has been realized, thereby not only make things convenient for user's use, avoided because electronic equipment built-in integrated circuit that charges's charging mode and the safety problem that results in with placing the battery festival number mismatch in equipment, electronic equipment's intelligent degree has been improved, user experience has been promoted.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a circuit diagram of a single-battery and dual-battery charging self-identification circuit according to an embodiment of the present invention;

fig. 2 is a circuit diagram of a single-battery and dual-battery charging self-identification circuit according to another embodiment of the present invention;

fig. 3 is a circuit diagram of a single-battery and dual-battery charging self-identification circuit according to another embodiment of the present invention.

Description of reference numerals:

1-battery detection circuit, 101-first detection circuit, 102-second detection circuit, R58-first resistor, R54-second resistor, R24-third resistor, R29-fourth resistor, 2-control circuit, 3-single battery charging circuit, 4-double battery charging circuit, 5-battery circuit, 51-first battery loading position, 52-second battery loading position, 6-single battery reverse connection protection switch, Q8-first field effect transistor, 7-double battery reverse connection protection switch, Q12-second field effect transistor, 8-charging interface, 9-charge detection circuit, R8-fifth resistor, R7-sixth resistor, 10-single battery charging switch, Q16A-third field effect transistor, Q16B-fourth field effect transistor, 11-a double-battery charging switch, Q1A-a fifth field effect transistor, Q1B-a sixth field effect transistor and 12-a low-voltage linear voltage stabilizer.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely 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 belong to the protection scope of the present invention.

Referring to fig. 1, an embodiment of the present invention provides a single-battery and dual-battery charging self-identification circuit, which includes a battery detection circuit 1, a control circuit 2, a single-battery charging circuit 3, a dual-battery charging circuit 4, and a battery circuit 5 having at least two battery loading positions; the battery detection circuit 1 is respectively electrically connected with the output end of the battery circuit 5 and the input end of the control circuit 2; the battery detection circuit 1 is used for outputting a first detection signal to the control circuit 2 when detecting that the battery circuit 5 contains a single battery, and outputting a second detection signal to the control circuit 2 when detecting that the battery circuit 5 contains a double battery; the output end of the control circuit 2 is respectively and electrically connected with the input end of the single-battery charging circuit 3 and the input end of the double-battery charging circuit 4; the control circuit 2 is used for outputting a first charging signal to the single-battery charging circuit 3 when receiving a first detection signal, and outputting a second charging signal to the double-battery charging circuit 4 when receiving a second detection signal; the output end of the single battery charging circuit 3 is electrically connected with the input end of the battery circuit 5, and the single battery charging circuit 3 is used for charging the battery circuit 5 when receiving a first charging signal; the output end of the double-battery charging circuit 4 is electrically connected with the input end of the battery circuit 5, and the double-battery charging circuit 4 is used for charging the battery circuit 5 when receiving the second charging signal. Specifically, the battery circuit 5 comprises a first battery loading position 51 and a second battery loading position 52, the negative electrode of the first battery loading position 51 is grounded, the positive electrode of the first battery loading position 51 is electrically connected with the negative electrode of the second battery loading position 52, the input end of the battery detection circuit 1 is respectively electrically connected with the positive electrode of the first battery loading position 51 and the positive electrode of the second battery loading position 52, the output end of the battery detection circuit 1 is electrically connected with the input end of the control circuit 2, the output end of the control circuit 2 is respectively electrically connected with the input end of the single-section battery charging circuit 3 and the input end of the double-section battery charging circuit 4, the output end of the single-section battery charging circuit 3 is electrically connected with the positive electrode of the first battery loading position 51, and the output end of the double-section battery charging circuit 4 is electrically connected with the positive electrode of the second battery loading position 52; when only the first battery housing portion 51 contains a battery, it can be considered that the battery circuit 5 contains a single battery, and when both the first battery housing portion 51 and the second battery housing portion 52 contain batteries, it can be considered that the battery circuit 5 contains a double battery.

In this embodiment, when the battery detection circuit 1 detects that the first battery loading position 51 contains a battery and the second battery loading position 52 does not contain a battery, the battery detection circuit 1 outputs a first detection signal to the control circuit 2, and when the control circuit 2 receives the first detection signal, the control circuit 2 outputs a first charging signal to the single battery charging circuit 3, so that the single battery charging circuit 3 charges the battery in the first battery loading position 51 after receiving the first charging signal; when the battery detection circuit 1 detects that the first battery loading position 51 and the second battery detection position 52 both contain batteries, the battery detection circuit 1 outputs a second detection signal to the control circuit 2, and when the control circuit 2 receives the second detection signal, the control circuit 2 outputs a second charging signal to the double-battery charging circuit 4, so that the double-battery charging circuit 4 charges the batteries in the first battery loading position 51 and the second battery loading position 52 after receiving the second charging signal; so, detect the battery quantity in the battery circuit 5 through setting up battery detection circuitry 1, and send the testing result to control circuit 2, make control circuit 2 can control the single section battery charging circuit 3 or the two section battery charging circuit 4 corresponding with the battery section number according to the testing result and charge the battery in the battery circuit, the automatic switch-over of battery charging mode has been realized, thereby not only made things convenient for user's use, and avoided because the built-in charging integrated circuit's of electronic equipment charging mode and the battery section number of placing in the equipment mismatch and the safety problem that leads to, electronic equipment's intelligent degree and user's use experience have been improved.

Further, referring to fig. 1 to 3, in an exemplary embodiment, the battery detection circuit 1 includes a first detection circuit 101 and a second detection circuit 102, the first detection circuit 101 includes a first resistor R58 and a second resistor R54, and the second detection circuit 102 includes a third resistor R24 and a fourth resistor R29; one end of a second resistor R54 is electrically connected with the output end of the battery circuit 5, the other end of the second resistor R54 is electrically connected with the input end of the control circuit 2 and one end of a first resistor R58 respectively, the other end of the first resistor R58 is grounded, one end of a fourth resistor R29 is electrically connected with the output end of the battery circuit 5, the other end of the fourth resistor R29 is electrically connected with the input end of the control circuit 2 and one end of a third resistor R24 respectively, and the other end of the third resistor R24 is grounded;

specifically, in this embodiment, the control circuit 2 includes a single chip microcomputer U2, a VSS pin of the single chip microcomputer U2 is grounded, one end of a second resistor R54 is electrically connected to the positive electrode of the first battery loading position 51, the other end of the second resistor R54 is electrically connected to the 4V2_ AD pin of the single chip microcomputer U2 and one end of a first resistor R58, the other end of the first resistor R58 is grounded, one end of a fourth resistor R29 is electrically connected to the positive electrode of the second battery loading position 52, the other end of the fourth resistor R29 is electrically connected to the 8V4_ AD pin of the single chip microcomputer U2 and one end of the third resistor R24, and the other end of the third resistor R24 is grounded;

in this embodiment, when it is detected that the first battery loading position 51 contains a battery through the first resistor R58 and the second resistor R54, the first detection circuit 101 outputs a high level signal to the 4V2_ AD pin of the single chip microcomputer U2, and when it is detected that the second battery loading position 52 does not contain a battery through the third resistor R24 and the fourth resistor R29, the second detection circuit 102 outputs a low level signal to the 8V4_ AD pin of the single chip microcomputer U2, and at this time, the single chip microcomputer U2 determines that the battery circuit 5 contains a single battery according to the received level signal and outputs a first charging signal to the single battery charging circuit 3, so that the single battery charging circuit 3 charges the battery in the first battery loading position 51;

in contrast, when it is detected that the first battery loading position 51 contains a battery through the first resistor R58 and the second resistor R54, the first detection circuit 101 outputs a high level signal to the 4V2_ AD pin of the single chip microcomputer U2, and when it is detected that the second battery loading position 52 contains a battery through the third resistor R24 and the fourth resistor R29, the second detection circuit 102 outputs a high level signal to the 8V4_ AD pin of the single chip microcomputer U2, and at this time, the single chip microcomputer U2 determines that the battery circuit 5 contains a dual battery according to the received level signal and outputs a second charging signal to the dual battery charging circuit 4, so that the dual battery charging circuit 4 charges the batteries in the first battery loading position 51 and the second battery loading position 52.

Further, referring to fig. 1 and 2, in an exemplary embodiment, the single-double battery charging self-identification circuit further includes a single-battery reverse-connection protection switch 6; wherein, the output end of the single battery charging circuit 3 is electrically connected with the input end of the battery circuit 5 through the single battery reverse connection protection switch 6.

In the present embodiment, based on the above structural design, by providing the reverse connection protection switch 6 for the single battery on the path between the output terminal of the single battery charging circuit 3 and the input terminal of the battery circuit 5, the reverse connection protection function can be achieved, and the battery in the battery circuit 5 is prevented from being burned out or even burning out the whole circuit when the battery in the first battery loading position 51 is placed reversely and is in the reverse connection state. Specifically, in the case where the battery circuit 5 includes a single battery, when the battery in the first battery loading position 51 is correctly placed, the single battery reverse connection protection switch 6 is closed, and the single battery charging circuit 3 can normally charge the battery in the first battery loading position 51; when the battery in the first battery loading position 51 is placed reversely, the reverse connection protection switch 6 of the single battery is switched off, and the charging current output from the single battery charging circuit 3 to the battery circuit 5 is blocked, so that the battery in the first battery loading position 51 cannot be charged, and the reverse connection protection function is achieved.

Further, referring to fig. 1 and 2, in an exemplary embodiment, the single-double battery charging self-identification circuit further includes a double-battery reverse-connection protection switch 7; wherein, the output end of the double-battery charging circuit 4 is electrically connected with the input end of the battery circuit 5 through the double-battery reverse connection protection switch 7.

In the present embodiment, based on the above structural design, by providing the double-battery reverse-connection protection switch 7 on the path between the output terminal of the double-battery charging circuit 4 and the input terminal of the battery circuit 5, the reverse-connection protection function can be achieved, and the battery in the battery circuit 5 is prevented from being charged and burning out the battery or even burning out the entire circuit when the battery in the first battery loading position 51 or the second battery loading position 52 is placed in the reverse-connection state by being placed in reverse. Specifically, in the case where the battery circuit 5 includes two batteries, when the batteries in the first battery loading position 51 and the second battery loading position 52 are both correctly placed, the two-battery reverse connection protection switch 7 is closed, and the two-battery charging circuit 4 can normally charge the batteries in the first battery loading position 51 and the second battery loading position 52; when the battery in the second battery loading position 52 is placed reversely, the double-battery reverse connection protection switch 7 is switched off, and the charging current output from the double-battery charging circuit 4 to the battery circuit 5 is blocked, so that the batteries in the first battery loading position 51 and the second battery loading position 52 can not be charged; when the battery in the first battery loading position 51 is placed reversely, the reverse connection protection switch 6 of the single battery is turned off, so that the control circuit 2 does not output a second charging signal to the double-battery charging circuit 4 according to the result, and the double-battery charging circuit 4 stops charging the batteries in the first battery loading position 51 and the second battery loading position 52; thereby playing the role of reverse connection prevention protection.

Further, referring to fig. 1 to 3, in an exemplary embodiment, the single-battery reverse-connection protection switch 6 includes a first field-effect transistor Q8, a source of the first field-effect transistor Q8 is electrically connected to the output terminal of the single-battery charging circuit 3, a gate of the first field-effect transistor Q8 is electrically connected to the output terminal of the battery circuit 5, and a drain of the first field-effect transistor Q8 is electrically connected to the input terminal of the battery circuit 5;

specifically, in this embodiment, the first fet Q8 is a P-channel MOS transistor, the single-cell battery charging circuit 3 includes a charging chip U1, a GND pin of the charging chip U1 is grounded, a source of the first fet Q8 is electrically connected to a SW pin of the charging chip U1, a gate of the first fet Q8 is electrically connected to a negative electrode of the first battery loading site 51, and a drain of the first fet Q8 is electrically connected to a positive electrode of the first battery loading site 51;

in this embodiment, when the first battery loading position 51 contains a battery and the second battery loading position 52 does not contain a battery, if the battery in the first battery loading position 51 is in a reverse connection state, the voltage of the gate of the first fet Q8 relative to the source thereof is smaller than a preset value, and due to the characteristics of the P-channel MOS transistor, the first fet Q8 is turned off, and the charging current output from the SW pin of the charging chip U1 to the positive electrode of the first battery loading position 51 is blocked, so that the battery in the first battery loading position 51 cannot be charged, thereby playing a role of reverse connection prevention protection, and preventing the battery from being charged and even burning the whole circuit when the battery in the first battery loading position 51 is placed in a reverse connection state due to reverse connection.

Further, referring to fig. 1 to 3, in an exemplary embodiment, the two-cell reverse-connection protection switch 7 includes a second fet Q12, a source of the second fet Q12 is electrically connected to the output terminal of the two-cell charging circuit 4, a gate of the second fet Q12 is electrically connected to the output terminal of the battery circuit 5, and a drain of the second fet Q12 is electrically connected to the input terminal of the battery circuit 5;

specifically, in this embodiment, the second fet Q12 is a P-channel MOS transistor, the two-cell battery charging circuit 4 includes a charging chip U5, the GND pin of the charging chip U5 is grounded, the source of the second fet Q12 is electrically connected to the BATT pin of the charging chip U5, the gate of the second fet Q12 is electrically connected to the negative electrode of the second battery loading site 52, and the drain of the second fet Q12 is electrically connected to the positive electrode of the second battery loading site 52;

in this embodiment, when the first battery loading position 51 and the second battery loading position 52 both contain batteries, if the battery in the second battery loading position 52 is in a reverse connection state, the voltage of the gate of the second fet Q12 relative to the source thereof is smaller than a preset value, and due to the characteristics of the P-channel MOS transistor, the second fet Q12 is turned off, and the charging current output from the BATT pin of the charging chip U5 to the anode of the second battery loading position 52 is blocked, so that the batteries in the first battery loading position 51 and the second battery loading position 52 cannot be charged; when the battery in the first battery loading position 51 is in a reverse connection state, the voltage of the grid electrode of the first field effect transistor Q8 relative to the source electrode thereof is smaller than a preset value, and due to the characteristics of the P-channel MOS transistor, the first field effect transistor Q8 is turned off at the moment, so that the single chip microcomputer U2 controls the charging chip U5 to stop charging the batteries in the first battery loading position 51 and the second battery loading position 52; thereby functioning as reverse connection prevention protection to prevent the battery from being charged and burning out the battery or even the entire circuit when the battery in the first battery loading position 51 or the second battery loading position 52 is placed in a reverse connection state by being reversed.

Further, referring to fig. 1 and 2, in an exemplary embodiment, the single-double battery charging self-identification circuit further includes a charging interface 8 and a charging detection circuit 9; the output end of the charging interface 8 is electrically connected with the input end of the charging detection circuit 9, the input end of the single-battery charging circuit 3 and the input end of the double-battery charging circuit 4 respectively; the output end of the charging detection circuit 9 is electrically connected with the input end of the control circuit 2, and the charging detection circuit 9 is used for outputting a charging start signal to the control circuit 2 when detecting that the output voltage of the charging interface 8 exceeds a preset voltage threshold value, so that the control circuit 2 outputs a first charging signal to the single-battery charging circuit 3 or outputs a second charging signal to the double-battery charging circuit 4;

in this embodiment, the charging interface 8 may be a USB Type-C charging interface, and when the battery needs to be charged, the input end of the charging interface 8 is connected to an external power supply; when the charging interface 8 is externally connected with a power supply and the charging detection circuit 9 detects that the voltage output by the charging interface 8 exceeds a preset voltage threshold, the charging detection circuit 9 outputs a charging start signal to the control circuit 2; if the control circuit 2 receives a first detection signal output by the battery detection circuit 1, the control circuit 2 outputs a first charging signal to the single battery charging circuit 3 while receiving a charging start signal, and the single battery charging circuit 3 outputs a charging current to the battery circuit 5 after receiving the first charging signal so as to charge the battery in the first battery loading position 51; if the control circuit 2 receives the second detection signal output by the battery detection circuit 1, the control circuit 2 outputs a second charging signal to the dual battery charging circuit 4 while receiving the charging start signal, and the dual battery charging circuit 4 outputs a charging current to the battery circuit 5 after receiving the second charging signal, so as to charge the batteries in the first battery loading position 51 and the second battery loading position 52.

Further, referring to fig. 1-3, in an exemplary embodiment, the charge detection circuit 9 includes a fifth resistor R8 and a sixth resistor R7; one end of the sixth resistor R7 is electrically connected to the output end of the charging interface 8, the other end of the sixth resistor R7 is electrically connected to the input end of the control circuit 2 and one end of the fifth resistor R8, respectively, and the other end of the fifth resistor R8 is grounded;

specifically, in this embodiment, the charging interface 8 includes a charging interface chip J1, three GND pins of the charging interface chip J1 are grounded, one end of a sixth resistor R7 is electrically connected to a VBUS pin of the charging interface chip J1, the other end of the sixth resistor R7 is electrically connected to a USB _ EN pin of the single chip U2 and one end of a fifth resistor R8, and the other end of the fifth resistor R8 is grounded;

in this embodiment, when the fifth resistor R8 and the sixth resistor R7 detect that the voltage output from the VBUS pin of the charging interface chip J1 exceeds a preset voltage threshold (e.g., 5V), the charging detection circuit 9 outputs a high level signal to the USB _ EN pin of the single chip microcomputer U2, and the single chip microcomputer U2 outputs a corresponding charging signal according to the determination result of the number of battery cells in the battery circuit 5 while receiving the high level signal from the USB _ EN pin of the single chip microcomputer U2; if the battery circuit 5 is judged to contain a single battery, the singlechip U2 outputs a first charging signal to the single battery charging circuit 3, so that the SW pin of the charging chip U1 outputs a charging current to the anode of the first battery loading position 51 to charge the battery in the first battery loading position 51; if the battery circuit 5 is determined to contain two batteries, the single chip microcomputer U2 outputs a second charging signal to the two-battery charging circuit 4, so that the BATT pin of the charging chip U5 outputs a charging current to the positive electrode of the second battery loading position 52, thereby charging the batteries in the first battery loading position 51 and the second battery loading position 52.

Further, referring to fig. 1 and 2, in an exemplary embodiment, the single-double battery charging self-identification circuit further includes a single battery charging switch 10; the output end of the charging interface 8 is electrically connected with the input end of the single-battery charging circuit 3 through a single-battery charging switch 10, the single-battery charging switch 10 is electrically connected with the output end of the control circuit 2, and the single-battery charging switch 10 is used for changing from an open state to a closed state when receiving a first charging signal sent by the control circuit 2;

in this embodiment, when the battery circuit 5 includes a single battery, when the charging interface 8 is connected to an external power source and the charging detection circuit 9 detects that the voltage output by the charging interface 8 exceeds a preset voltage threshold, the charging detection circuit 9 outputs a charging start signal to the control circuit 2, the control circuit 2 receives the charging start signal and outputs a first charging signal to the single battery charging switch 10, so that the single battery charging switch 10 is changed from an off state to an on state, the charging current output by the charging interface 8 is transmitted to the single battery charging circuit 3 through the single battery charging switch 10, and the single battery charging circuit 3 outputs a charging current to the battery circuit 5 after receiving the charging current, so as to charge the battery in the first battery loading position 51.

Further, referring to fig. 1 and 2, in an exemplary embodiment, the single-double battery charging self-identification circuit further includes a double battery charging switch 11; the output end of the charging interface 8 is electrically connected with the input end of the double-battery charging circuit 4 through a double-battery charging switch 11, the double-battery charging switch 11 is electrically connected with the output end of the control circuit 2, and the double-battery charging switch 11 is used for changing from an open state to a closed state when receiving a second charging signal sent by the control circuit 2;

in this embodiment, when the battery circuit 5 includes a dual battery, when the charging interface 8 is externally connected to a power supply and the charging detection circuit 9 detects that the voltage output by the charging interface 8 exceeds a preset voltage threshold, the charging detection circuit 9 outputs a charging start signal to the control circuit 2, the control circuit 2 receives the charging start signal and outputs a second charging signal to the dual battery charging switch 11, so that the dual battery charging switch 11 is changed from an off state to a closed state, the charging current output by the charging interface 8 is transmitted to the dual battery charging circuit 4 through the dual battery charging switch 11, and the dual battery charging circuit 4 outputs a charging current to the battery circuit 5 after receiving the charging current, so as to charge the batteries in the first battery loading location 51 and the second battery loading location 52;

in addition, when the battery circuit 5 includes two batteries, if the battery in the first battery loading position 51 is in a reverse connection state, the control circuit 2 controls the double-battery charging switch 11 to be turned off, and at this time, the charging current output from the charging interface 8 to the double-battery charging circuit 4 is blocked by the double-battery charging switch 11, so that the double-battery charging circuit 4 cannot charge the batteries in the first battery loading position 51 and the second battery loading position 52, thereby achieving the purpose of reverse connection protection.

Further, referring to fig. 1-3, in an exemplary embodiment, the single battery charging switch 10 includes a third fet Q16A and a fourth fet Q16B; the source electrode of the third field-effect tube Q16A is grounded, the gate electrode of the third field-effect tube Q16A is electrically connected with the output end of the control circuit 2, the drain electrode of the third field-effect tube Q16A is electrically connected with the gate electrode of the fourth field-effect tube Q16B, the source electrode of the fourth field-effect tube Q16B is electrically connected with the output end of the charging interface 8, and the drain electrode of the fourth field-effect tube Q16B is electrically connected with the input end of the single-battery charging circuit 3;

specifically, in the present embodiment, the third fet Q16A is an N-channel MOS transistor for the low-side drive with the source grounded, and the fourth fet Q16B is an N-channel MOS transistor for the high-side drive with the source grounded; the source electrode of the third field effect transistor Q16A is grounded, the grid electrode of the third field effect transistor Q16A is electrically connected with the pin 4V2_ CE of the single chip microcomputer U2, the drain electrode of the third field effect transistor Q16A is electrically connected with the grid electrode of the fourth field effect transistor Q16B, the source electrode of the fourth field effect transistor Q16B is electrically connected with the pin VBUS of the charging interface chip J1, and the drain electrode of the fourth field effect transistor Q16B is electrically connected with the pin VIN of the charging chip U1;

in this embodiment, when it is detected that the first battery loading position 51 contains a battery through the first resistor R58 and the second resistor R54, the first detection circuit 101 outputs a high level signal to the 4V2_ AD pin of the single chip microcomputer U2, and when it is detected that the second battery loading position 52 does not contain a battery through the third resistor R24 and the fourth resistor R29, the second detection circuit 102 outputs a low level signal to the 8V4_ AD pin of the single chip microcomputer U2, and at this time, the single chip microcomputer U2 determines that the battery circuit 5 contains a single battery according to the received level signal; when the charging interface 8 is externally connected with a power supply, the fifth resistor R8 and the sixth resistor R7 detect that the voltage output by the VBUS pin of the charging interface chip J1 exceeds a preset voltage threshold (for example, 5V), the charging detection circuit 9 outputs a charging start signal to the USB _ EN pin of the single chip microcomputer U2, the single chip microcomputer U2 sends a high level signal to the gate of the third fet Q16A through the 4V2_ CE pin thereof when receiving the charging start signal, due to the characteristic of the N-channel MOS, the third fet Q16A is turned on and sends a level signal to the gate of the fourth fet Q16B through the drain thereof, due to the characteristic of the P-channel MOS, the fourth fet Q16B is turned on, the single-cell charging switch 10 is in the on state at this time, and at the same time, the single chip microcomputer U2 sends a low level signal to the gate of the fifth fet Q1 463 through the 8V4_ CE pin thereof, and due to the characteristic of the N-channel MOS A is turned off and the drain thereof cannot send the level signal to the sixth fet B through the drain thereof Due to the characteristics of the P-channel MOS transistor, the sixth field-effect transistor Q1B is turned off, and the dual-battery charging switch 11 is turned off at this time; in this case, the charging current output from the charging interface chip J1 through its VBUS pin is transmitted to the VIN pin of the charging chip U1 through the single cell charging switch 10, and the charging chip U1 outputs the charging current to the positive electrode of the first battery loading bay 51 through its SW pin after receiving the charging current, thereby charging the battery in the first battery loading bay 51.

Further, referring to fig. 1-3, in an exemplary embodiment, the dual battery charging switch 11 includes a fifth fet Q1A and a sixth fet Q1B; the source electrode of the fifth field-effect tube Q1A is grounded, the gate electrode of the fifth field-effect tube Q1A is electrically connected with the output end of the control circuit 2, the drain electrode of the fifth field-effect tube Q1A is electrically connected with the gate electrode of the sixth field-effect tube Q1B, the source electrode of the sixth field-effect tube Q1B is electrically connected with the output end of the charging interface 8, and the drain electrode of the sixth field-effect tube Q1B is electrically connected with the input end of the double-battery charging circuit 4;

specifically, in the present embodiment, the fifth fet Q1A is an N-channel MOS transistor in the case of low-side driving with the source grounded, and the sixth fet Q1B is an N-channel MOS transistor in the case of high-side driving with the source grounded, and is a P-channel MOS transistor in the case of high-side driving with the source grounded; the source electrode of the fifth field-effect tube Q1A is grounded, the grid electrode of the fifth field-effect tube Q1A is electrically connected with the pin 8V4_ CE of the single chip microcomputer U2, the drain electrode of the fifth field-effect tube Q1A is electrically connected with the grid electrode of the sixth field-effect tube Q1B, the source electrode of the sixth field-effect tube Q1B is electrically connected with the pin VBUS of the charging interface chip J1, and the drain electrode of the sixth field-effect tube Q1B is electrically connected with the two pins SW of the charging chip U5;

in this embodiment, when it is detected that the first battery loading position 51 contains a battery through the first resistor R58 and the second resistor R54, the first detection circuit 101 outputs a high level signal to the 4V2_ AD pin of the single chip microcomputer U2, and when it is detected that the second battery loading position 52 contains a battery through the third resistor R24 and the fourth resistor R29, the second detection circuit 102 outputs a high level signal to the 8V4_ AD pin of the single chip microcomputer U2, and at this time, the single chip microcomputer U2 determines that the battery circuit 5 contains a dual battery according to the received level signal; when the charging interface 8 is externally connected with a power supply, the fifth resistor R8 and the sixth resistor R7 detect that the voltage output by the VBUS pin of the charging interface chip J1 exceeds a preset voltage threshold, the charging detection circuit 9 outputs a charging start signal to the USB _ EN pin of the single chip microcomputer U2, the single chip microcomputer U2 sends a low level signal to the gate of the third field effect transistor Q16A through the 4V2_ CE pin thereof when receiving the charging start signal, due to the characteristic of the N-channel MOS transistor, the third field effect transistor Q16A is turned off and cannot send a level signal to the gate of the fourth field effect transistor Q16B through the drain thereof, due to the characteristic of the P-channel MOS transistor, the fourth field effect transistor Q16B is turned off, the single-cell charging switch 10 is in the off state at this time, and at the same time, the single chip microcomputer U2 sends a high level signal to the gate of the fifth field effect transistor Q1A through the 8V4_ CE pin thereof, and due to the characteristic of the N-channel MOS transistor, the drain 1A turns on the level signal to the gate of the sixth field effect transistor Q1B, due to the characteristics of the P-channel MOS transistor, the sixth field effect transistor Q1B is turned on, and the dual battery charging switch 11 is in a conducting state at this time; in this case, the charging current output from the charging interface chip J1 through its VBUS pin is transmitted to the two SW pins of the charging chip U5 through the two-cell charging switch 11, and the charging chip U5 outputs the charging current to the positive electrode of the second battery loading position 52 through its BATT pin after receiving the charging current, thereby charging the batteries in the first battery loading position 51 and the second battery loading position 52.

In addition, in the case where the battery circuit 5 includes two batteries, if the batteries in the first battery loading position 51 are in the reverse connection state, the single-chip microcomputer U2 sends a low level signal to the gate of the fifth fet Q1A through its 8V4_ CE pin, due to the characteristics of the N-channel MOS transistor, the fifth fet Q1A is turned off and cannot send a level signal to the gate of the sixth fet Q1B through its drain, due to the characteristics of the P-channel MOS transistor, the sixth fet Q1B is turned off, the dual battery charging switch 11 is turned off, in this case, the charging current originally output from the charging interface chip J1 to the two SW pins of the charging chip U5 through its VBUS pin is blocked by the two-cell charging switch 11, so that the charging chip U5 cannot charge the batteries in the first battery loading position 51 and the second battery loading position 52, thereby achieving the purpose of reverse connection prevention protection.

Further, referring to fig. 1 and 2, in an exemplary embodiment, the single-double battery charging self-identification circuit further includes a low voltage linear regulator 12; the output end of the low-voltage linear voltage stabilizer 12 is electrically connected with the input end of the control circuit 2, the input end of the low-voltage linear voltage stabilizer 12 is electrically connected with the output end of the battery circuit 5, and the grounding end of the low-voltage linear voltage stabilizer 12 is grounded;

in the present embodiment, based on the above structural design, the low voltage linear regulator 12 is disposed on the path between the input terminal of the control circuit 2 and the output terminal of the battery circuit 5, so as to perform the function of voltage stabilization, so that the battery in the battery circuit 5 can stably supply power to the control circuit 2.

Correspondingly, the embodiment of the utility model provides an electronic equipment is still provided, including the single double battery charging self-identification circuit in any above-mentioned embodiment; the electronic device may be a handheld portable device such as an interphone.

In this embodiment, thanks to the improvement of the above-mentioned single-double battery charging self-identification circuit, the electronic device of this embodiment has the same technical effects as the above-mentioned single-double battery charging self-identification circuit, and details thereof are omitted here.

It should be noted that the other contents of the single-battery and dual-battery charging self-identification circuit and the electronic device disclosed in the present invention can be referred to in the prior art, and are not described herein again.

In addition, it should be noted that the descriptions related to "first", "second", etc. in the present invention are only used for descriptive purposes 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 at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Above only be the utility model discloses an optional embodiment to not consequently restrict the utility model discloses a patent range, all be in the utility model discloses a under the design, utilize the equivalent structure transform of doing of the contents of description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. A single-double battery charging self-recognition circuit is characterized by comprising a battery detection circuit, a control circuit, a single battery charging circuit, a double battery charging circuit and a battery circuit with at least two battery loading positions; wherein the content of the first and second substances,

2. The single-and-double battery charging self-identification circuit according to claim 1, wherein the battery detection circuit comprises a first detection circuit and a second detection circuit, the first detection circuit comprises a first resistor and a second resistor, and the second detection circuit comprises a third resistor and a fourth resistor;

3. The single-double battery charging self-identification circuit according to claim 1, wherein the single-double battery charging self-identification circuit further comprises a single-battery reverse connection protection switch and/or a double-battery reverse connection protection switch; wherein the content of the first and second substances,

4. The single-double battery charging self-identification circuit according to claim 3, wherein the single-double battery reverse connection protection switch comprises a first field effect transistor, and the double-double battery reverse connection protection switch comprises a second field effect transistor; wherein the content of the first and second substances,

5. The single-double battery charging self-identification circuit according to any one of claims 1 to 4, wherein the single-double battery charging self-identification circuit further comprises a charging interface and a charging detection circuit; wherein the content of the first and second substances,

6. The battery charge self-identification circuit of claim 5, wherein the charge detection circuit comprises a fifth resistor and a sixth resistor; one end of the sixth resistor is electrically connected with the output end of the charging interface, the other end of the sixth resistor is electrically connected with the input end of the control circuit and one end of the fifth resistor respectively, and the other end of the fifth resistor is grounded.

7. The single-double battery charging self-identification circuit according to claim 5, further comprising a single-double battery charging switch and/or a double battery charging switch, wherein,

8. The single-double battery charging self-identification circuit according to claim 7, wherein the single-double battery charging switch comprises a third field effect transistor and a fourth field effect transistor, and the double-double battery charging switch comprises a fifth field effect transistor and a sixth field effect transistor; wherein the content of the first and second substances,

9. The self-identification circuit for charging single or double batteries according to claim 1, further comprising a low voltage linear regulator, wherein an output terminal of the low voltage linear regulator is electrically connected to an input terminal of the control circuit, an input terminal of the low voltage linear regulator is electrically connected to an output terminal of the battery circuit, and a ground terminal of the low voltage linear regulator is grounded.

10. An electronic device comprising a single-double battery charging self-identification circuit as claimed in any one of claims 1 to 9.