Charging control circuit and charger

Abstract

The utility model provides a charging control circuit and a charger. The charging control circuit comprises a controller, a first switch module and at least two charging branches. Specifically, at least two charging branches are electrically connected to the controller, each charging branch comprises a one-way conduction element, a second switch module and a connecting port, the one-way conduction element and the second switch module are electrically connected between the first switch module and the connecting port, and the one-way conduction element and the second switch module are electrically connected between the first switch module and the connecting port. The controller is configured to respond to a voltage detection signal of the input end of the one-way conduction element so as to control connection and disconnection of the first switch module and the second switch module according to a voltage signal output by the first end of the one-way conduction element, and when the controller detects a single voltage detection signal, the controller controls the second switch module to be switched off so as to control the first switch module to be switched off. The situation that the battery connected to the charging branch and the batteries connected to other charging branches form a loop, and consequently the power supply module cannot normally charge the batteries is avoided, and the reliability of the charger is improved.

Description

Technical Field

[0001] The present application relates to the technical field of charging equipment, and in particular to a charging control circuit and a charger. Background Art

[0002] In actual applications, when a multi-port charger is operating, if any charging branch experiences an abnormality, the battery connected to that charging branch will form a charging loop with the batteries connected to other charging branches, causing the multi-port charger to be unable to charge the batteries normally, thereby reducing the reliability of the multi-port charger. Utility Model Content

[0003] In view of the above, the present application provides a charging control circuit and a charger for solving the problem that a multi-output port charger cannot charge a battery normally when any charging branch in the multi-output port charger has an abnormality.

[0004] A first aspect of the present application provides a charging control circuit, comprising: a controller, a first switch module, and at least two charging branches, wherein the at least two charging branches are electrically connected to the controller. The first switch module is electrically connected between a power supply module and the charging branches, and is also electrically connected to the controller. The first switch module is configured to open or close the electrical connection between the power supply module and the charging branches. Each charging branch includes a unidirectional conductive element, a second switch module, and a connection port. A first end of the unidirectional conductive element is electrically connected to the first switch module, a second end of the unidirectional conductive element is electrically connected to the second switch module, the second switch module is electrically connected between the unidirectional conductive element and the connection port, the connection port being configured to connect to a battery, and the second switch module is configured to open or close the electrical connection between the unidirectional conductive element and the connection port. The controller is configured to: when the connection port is connected to a battery, output a conduction signal to the second switch module to control the second switch module to conduct, and detect whether a voltage signal is output at the first end of the unidirectional conductive element. If no voltage signal is output at the first end of the unidirectional conductive element, the controller outputs a conduction signal to the first switch module to control the first switch module to conduct. When a voltage signal is output to the first end of the unidirectional conductive element, a disconnection signal is output to the second switch module to control the second switch module to be turned off.

[0005] As an optional implementation, the second switch module includes: a first switch transistor, a second switch transistor, and a third switch transistor. The first switch transistor is electrically connected between the unidirectional conductive element and the second switch transistor, and the second switch transistor is electrically connected between the first switch transistor and the connection port. The third switch transistor is electrically connected between the first switch transistor and ground, and the third switch transistor is electrically connected between the second switch transistor and ground.

[0006] As an optional implementation, the controller is configured to: when a voltage signal is output to the first end of the unidirectional conductive element, output a disconnection signal to the third switch tube to control the third switch tube to disconnect the electrical connection between the first switch tube and the second switch tube and the ground, and further control the first switch tube and the second switch tube to disconnect the electrical connection between the unidirectional conductive element and the connection port.

[0007] As an optional implementation, the controller is configured to: when the connection port is connected to a battery, output a conduction signal to the third switch tube to control the third switch tube to conduct the electrical connection between the first switch tube and the second switch tube and the ground, and detect whether the first end of the unidirectional conduction element outputs a voltage signal.

[0008] As an optional implementation, the first switch module includes: a fourth switch tube, a fifth switch tube, and a sixth switch tube. The fourth switch tube is electrically connected between the power supply module and the fifth switch tube, and the fifth switch tube is electrically connected between the fourth switch tube and the charging branch. The sixth switch tube is electrically connected between the fourth switch tube and ground, and the sixth switch tube is electrically connected between the fifth switch tube and ground.

[0009] As an optional implementation, the controller is configured to: when there is no output voltage signal at the first end of the unidirectional conductive element, output a conduction signal to the sixth switch tube to control the sixth switch tube to conduct the electrical connection between the fourth switch tube and the fifth switch tube and the ground, and then control the fourth switch tube and the fifth switch tube to conduct the electrical connection between the power supply module and the charging branch.

[0010] As an optional implementation, the charging control circuit further includes a voltage detection circuit electrically connected to the first terminal of the unidirectional conducting element and the controller. The voltage detection circuit is configured to detect whether the first terminal of the unidirectional conducting element outputs a voltage signal.

[0011] As an optional implementation, the voltage detection circuit includes: a first resistor and a second resistor. The first end of the first resistor is electrically connected to the first end of the unidirectional conductive element, the second end of the first resistor is grounded via the second resistor, and the voltage detection pin of the controller is electrically connected to the connection point between the first resistor and the second resistor.

[0012] As an optional implementation, the unidirectional conducting element is a unidirectional diode or a unidirectional conducting relay.

[0013] The second aspect of the present application may also provide a charger, comprising a shell and a charging control circuit as described in any one of the first aspects, wherein the charging control circuit is arranged in the shell.

[0014] The charging control circuit and charger of the present application can solve the problem of a multi-port charger being unable to properly charge batteries when any charging branch of the multi-port charger experiences an abnormality, resulting in low reliability. This application utilizes a controller to control the conduction and disconnection of a first switch module and a second switch module based on a voltage signal output from the first end of a unidirectional conducting element. When the controller detects a single voltage detection signal, it controls the second switch module to shut down, preventing the battery connected to the charging branch from forming a loop with the battery connected to other charging branches, which could prevent the power supply module from properly charging the battery, thereby improving the reliability of the charger. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a circuit diagram of a charging control circuit provided in an embodiment of the present application.

[0016] Figure 2 This is a specific circuit diagram of a charging control circuit provided in an embodiment of the present application.

[0017] Figure 3 This is another specific circuit diagram of a charging control circuit provided in an embodiment of the present application.

[0018] Figure 4 This is another specific circuit diagram of a charging control circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] The technical solution of the present application is further described in detail below through the accompanying drawings and examples.

[0020] In view of the foregoing, the present application provides a charging control circuit 100 and charger that can address the issue of a multi-port charger being unable to charge a battery properly when any charging branch in the charger experiences an abnormality, resulting in reduced reliability. This application can control the remaining ports to charge the battery properly when any charging branch experiences an abnormality, thereby improving the reliability of the multi-port charger.

[0021] The first aspect of the present application provides a charging control circuit 100. The charging control circuit 100 can be as follows: Figure 1 (The figure only shows three charging branches 30 as an example) The figure includes: a controller 10, a first switch module 20 and at least two charging branches 30. In actual application, at least two charging branches 30 are electrically connected to the controller 10; wherein:

[0022] The first switch module 20 is electrically connected between the power supply module and the charging branch 30 , and is electrically connected to the controller 10 . The first switch module 20 is used to connect or disconnect the electrical connection between the power supply module and the charging branch 30 .

[0023] Specifically, each charging branch 30 includes a unidirectional conductive element 01, a second switch module 02, and a connection port 0303; wherein, the first end of the unidirectional conductive element 01 is electrically connected to the first switch module 20, the second end of the unidirectional conductive element 01 is electrically connected to the second switch module 02, the second switch module 02 is electrically connected between the unidirectional conductive element 01 and the connection port 03, the connection port 03 is used to connect to the battery, and the second switch module 02 is used to conduct or disconnect the electrical connection between the unidirectional conductive element 01 and the connection port 03.

[0024] In actual application, the controller 10 is configured as follows: when the connection port 03 is connected to a battery, the controller 10 outputs a conduction signal to the second switch module 02 to control the conduction of the second switch module 02, and detects whether the first end of the unidirectional conductive element 01 outputs a voltage signal; when the first end of the unidirectional conductive element 01 does not output a voltage signal, the controller 10 outputs a conduction signal to the first switch module 20 to control the conduction of the first switch module 20; when the first end of the unidirectional conductive element 01 outputs a voltage signal, the controller 10 outputs a disconnection signal to the second switch module 02 to control the second switch module 02 to be turned off.

[0025] The working process of the above-mentioned charging control circuit 100 is as follows: when charging, the first switch module 20 is electrically connected to the power supply module, and each connection port 03 is connected to the corresponding battery. At this time, the controller 10 outputs a conduction signal to the second switch module 02 to control the second switch module 02 to conduct, and detects whether the first end of the unidirectional conductive element 01 outputs a voltage signal. Specifically, when the first end of the unidirectional conductive element 01 outputs a voltage signal, the unidirectional conductive element 01 has a fault. At this time, the controller 10 outputs a disconnection signal to the second switch module 02 to control the second switch module 02 to shut down, so as to prevent the charging branch 30 where the faulty unidirectional conductive element 01 is located from being turned on, causing the current on the charging branch 30 to flow back, forming a loop with the batteries connected to other charging branches 30, and causing the power supply module to be unable to charge the battery normally; when the first end of the unidirectional conductive element 01 does not output a voltage signal, the controller 10 outputs a conduction signal to the first switch module 20 to control the first switch module 20 to conduct, so that the charging control circuit 100 can operate normally.

[0026] In practical applications, the unidirectional conducting element 01 can be a unidirectional diode or a unidirectional conducting relay. The practical application is not limited thereto and depends on the specific application environment, all of which are within the protection scope of this application.

[0027] The charging control circuit 100 provided in this embodiment uses the controller 10 to control the conduction and disconnection of the first switch module 20 and the second switch module 02 based on the voltage signal output by the first end of the unidirectional conductive element 01. When the controller 10 detects a single voltage detection signal, the second switch module 02 is controlled to be turned off, thereby preventing the battery connected to the charging branch 30 from forming a loop with the batteries connected to other charging branches 30, causing the power supply module to be unable to charge the battery normally, thereby improving the reliability of the charger.

[0028] On the basis of the above embodiment, another embodiment of the present application further provides a specific charging control circuit 100, such as Figure 2 As shown, the second switch module 02 in the charging control circuit 100 includes: a first switch tube Q5, a second switch tube Q6 and a third switch tube Q4; wherein:

[0029] The first switch tube Q5 is electrically connected between the unidirectional conduction element O1 and the second switch tube Q6, and the second switch tube Q6 is electrically connected between the first switch tube Q5 and the connection port O3; the third switch tube Q4 is electrically connected between the first switch tube Q5 and the ground, and the third switch tube Q4 is electrically connected between the second switch tube Q6 and the ground.

[0030] The working process of the above-mentioned charging control circuit 100 is as follows: when charging, the first switch module 20 is electrically connected to the power supply module, and each connection port O3 is connected to the corresponding battery. At this time, the controller 10 outputs a conduction signal to the third switch tube Q4 to control the third switch tube Q4 to conduct the electrical connection between the first switch tube Q5 and the second switch tube Q6 and the ground. At this time, the controller 10 detects whether the first end of the unidirectional conductive element O1 outputs a voltage signal. Specifically, when the first end of the unidirectional conductive element O1 outputs a voltage signal, the unidirectional conductive element O1 has a fault. At this time, the controller 10 outputs a disconnection signal to the third switch tube Q4 to control the third switch tube Q4 to disconnect. The first switch tube Q5 and the second switch tube Q6 are electrically connected to the ground, thereby controlling the first switch tube Q5 and the second switch tube Q6 to disconnect the electrical connection between the unidirectional conductive element 01 and the battery, thereby preventing the charging branch 30 where the unidirectional conductive element 01 is located from being turned on. This causes the current on the charging branch 30 to flow back, forming a loop with the batteries connected to other charging branches 30, causing the power supply module to be unable to normally charge the batteries on the other branches. When the first end of the unidirectional conductive element 01 does not output a voltage signal, the controller 10 outputs a conduction signal to the first switch module 20 to control the first switch module 20 to be turned on, so that the charging control circuit 100 can operate normally.

[0031] The charging control circuit 100 provided in this embodiment utilizes a first switching transistor Q5, a second switching transistor Q6, and a third switching transistor Q4 to form a second switching module 02. This allows the controller 10 to control the conduction and disconnection of each device in the second switching module 02 based on the voltage signal output by the first end of the unidirectional conducting element 01. When the controller 10 detects a single voltage detection signal, the controller 10 controls the first switching transistor Q5, the second switching transistor Q6, and the third switching transistor Q4 in the second switching module 02 to be turned off. This prevents the battery connected to the charging branch 30 from forming a loop with the batteries connected to other charging branches 30, which could cause the power supply module to be unable to charge the batteries normally. This improves the reliability of the charger.

[0032] On the basis of the above embodiment, another embodiment of the present application further provides a specific charging control circuit 100, such as Figure 2 As shown, the first switch module 20 in the charging control circuit 100 includes: a fourth switch tube Q2, a fifth switch tube Q3 and a sixth switch tube Q1; wherein:

[0033] The fourth switch tube Q2 is electrically connected between the power supply module and the fifth switch tube Q3, and the fifth switch tube Q3 is electrically connected between the fourth switch tube Q2 and the charging branch 30; the sixth switch tube Q1 is electrically connected between the fourth switch tube Q2 and ground, and the sixth switch tube Q1 is electrically connected between the fifth switch tube Q3 and ground.

[0034] The operation process of the above-mentioned charging control circuit 100 is as follows: when the first end of the unidirectional conductive element O1 does not output a voltage signal, the controller 10 outputs a conduction signal to the sixth switch tube Q1 to control the sixth switch tube Q1 to conduct the electrical connection between the fourth switch tube Q2 and the fifth switch tube Q3 and the ground, thereby controlling the fourth switch tube Q2 and the fifth switch tube Q3 to conduct the electrical connection between the power supply module and the charging branch 30.

[0035] The charging control circuit 100 provided in this embodiment uses a fourth switch tube Q2, a fifth switch tube Q3, and a sixth switch tube Q1 to form a first switch module 20. When no voltage signal is output from the first end of the unidirectional conducting element O1, the controller 10 can control the conduction of the fourth switch tube Q2, the fifth switch tube Q3, and the sixth switch tube Q1 to achieve electrical connection between the power supply module and the charging branch 30, so that the charging control circuit 100 can normally charge the battery.

[0036] On the basis of the above embodiment, another embodiment of the present application further provides a specific charging control circuit 100, such as Figure 3 As shown, the charging control circuit 100 further includes: a voltage detection circuit, which is electrically connected to the first end of the unidirectional conducting element 01 and the controller 10, and is used to detect whether the first end of the unidirectional conducting element 01 outputs a voltage signal.

[0037] In practical applications, the voltage detection circuit can be Figure 4 The figure includes: a first resistor R1 and a second resistor R2; wherein, the first end of the first resistor R1 is electrically connected to the first end of the unidirectional conductive element 01, the second end of the first resistor R1 is grounded through the second resistor R2, and the voltage detection pin of the controller 10 is electrically connected to the connection point A between the first resistor R1 and the second resistor R2.

[0038] The working process of the above-mentioned charging control circuit 100 is: when charging, the controller 10 detects whether the first end of the unidirectional conductive element 01 outputs a voltage signal through the voltage detection circuit, so that the controller 10 can control the shutdown of the first switch module 20 according to the voltage signal detected by the voltage detection circuit.

[0039] Optional, with Figure 3 Taking an example, when charging, the controller 10 can detect whether the first end of the unidirectional conductive element 01 outputs a voltage signal through the first resistor R1 and the second resistor R2, and control the shutdown of the first switch module 20 according to the voltage signal detected at the connection point A between the first resistor R1 and the second resistor R2.

[0040] The charging control circuit 100 provided in this embodiment uses a voltage detection circuit to detect whether the first end of the unidirectional conductive element 01 outputs a voltage signal, and controls the shutdown of the first switch module 20 based on the voltage signal. This prevents the battery connected to any charging branch 30 from forming a loop with the batteries connected to other charging branches 30 when the unidirectional conductive element 01 on that charging branch 30 fails, causing the power supply module to be unable to charge the battery normally, thereby improving the reliability of the charger.

[0041] Based on the above embodiments, another embodiment of the present application further provides a charger, including a housing and a charging control circuit 100 as described in any of the above embodiments, wherein the charging control circuit 100 is disposed in the housing.

[0042] The charger provided in this embodiment utilizes a housing and a charging control circuit 100 as described in any of the above embodiments, so that the controller 10 in the charger can control the conduction and disconnection of the first switch module 20 and the second switch module 02 based on the voltage signal output by the first end of the unidirectional conductive element 01. When the controller 10 detects a single voltage detection signal, the second switch module 02 is controlled to be turned off, thereby preventing the battery connected to the charging branch 30 from forming a loop with the batteries connected to other charging branches 30, which would cause the power supply module to be unable to charge the battery normally, thereby improving the reliability of the charger.

[0043] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, as long as they are within the scope of the essence of the present application, appropriate changes and modifications made to the above embodiments should fall within the scope of protection claimed in the present application.

Claims

1. A charging control circuit, characterized in that: include: A controller, a first switch module, and at least two charging branches, wherein the at least two charging branches are electrically connected to the controller; The first switch module is electrically connected between the power supply module and the charging branch, and the first switch module is electrically connected to the controller, and the first switch module is used to conduct or disconnect the electrical connection between the power supply module and the charging branch; Each of the charging branches includes a unidirectional conductive element, a second switch module and a connection port; A first end of the unidirectional conductive element is electrically connected to the first switch module, a second end of the unidirectional conductive element is electrically connected to the second switch module, the second switch module is electrically connected between the unidirectional conductive element and the connection port, the connection port is used to connect a battery, and the second switch module is used to conduct or disconnect the electrical connection between the unidirectional conductive element and the connection port; The controller is configured to: When the connection port is connected to the battery, outputting a conduction signal to the second switch module to control the second switch module to be turned on, and detecting whether the first end of the unidirectional conduction element outputs a voltage signal; When the first end of the unidirectional conductive element does not output the voltage signal, outputting a conduction signal to the first switch module to control the first switch module to be turned on; When the first end of the unidirectional conductive element outputs the voltage signal, a disconnection signal is output to the second switch module to control the second switch module to be turned off.

2. The charging control circuit according to claim 1, wherein: The second switch module includes: a first switch tube, a second switch tube and a third switch tube; The first switch tube is electrically connected between the unidirectional conducting element and the second switch tube, and the second switch tube is electrically connected between the first switch tube and the connection port; The third switch tube is electrically connected between the first switch tube and the ground, and the third switch tube is electrically connected between the second switch tube and the ground.

3. The charging control circuit according to claim 2, wherein: The controller is configured to: When the voltage signal is output to the first end of the unidirectional conductive element, a disconnection signal is output to the third switch tube to control the third switch tube to disconnect the electrical connection between the first switch tube and the second switch tube and the ground, thereby controlling the first switch tube and the second switch tube to disconnect the electrical connection between the unidirectional conductive element and the connection port.

4. The charging control circuit according to claim 2, wherein: The controller is configured to: When the connection port is connected to the battery, a conduction signal is output to the third switch tube to control the third switch tube to conduct the electrical connection between the first switch tube, the second switch tube and the ground, and detect whether the first end of the unidirectional conduction element outputs the voltage signal.

5. The charging control circuit according to claim 1, wherein: The first switch module includes: a fourth switch tube, a fifth switch tube and a sixth switch tube; The fourth switch tube is electrically connected between the power supply module and the fifth switch tube, and the fifth switch tube is electrically connected between the fourth switch tube and the charging branch; The sixth switch tube is electrically connected between the fourth switch tube and the ground, and the sixth switch tube is electrically connected between the fifth switch tube and the ground.

6. The charging control circuit according to claim 5, characterized in that: The controller is configured to: When the first end of the unidirectional conductive element does not output the voltage signal, a conduction signal is output to the sixth switch tube to control the sixth switch tube to conduct the electrical connection between the fourth switch tube and the fifth switch tube and the ground, thereby controlling the fourth switch tube and the fifth switch tube to conduct the electrical connection between the power supply module and the charging branch.

7. The charging control circuit according to claim 1, wherein: The charging control circuit further includes: a voltage detection circuit, the voltage detection circuit being electrically connected to the first end of the unidirectional conductive element and the controller; The voltage detection circuit is used to detect whether the first end of the unidirectional conducting element outputs the voltage signal.

8. The charging control circuit according to claim 7, characterized in that: The voltage detection circuit includes: a first resistor and a second resistor; The first end of the first resistor is electrically connected to the first end of the unidirectional conductive element, the second end of the first resistor is grounded through the second resistor, and the voltage detection pin of the controller is electrically connected to the connection point between the first resistor and the second resistor.

9. The charging control circuit according to any one of claims 1 to 8, characterized in that: The one-way conducting element is a one-way diode or a one-way conducting relay.

10. A charger, characterized in that: It comprises a shell and a charging control circuit according to any one of claims 1 to 9, wherein the charging control circuit is arranged in the shell.

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