CN110380492B - Battery charging control circuit and electronic equipment - Google Patents
Battery charging control circuit and electronic equipment Download PDFInfo
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- CN110380492B CN110380492B CN201910784850.8A CN201910784850A CN110380492B CN 110380492 B CN110380492 B CN 110380492B CN 201910784850 A CN201910784850 A CN 201910784850A CN 110380492 B CN110380492 B CN 110380492B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to the field of battery technologies, and in particular, to a battery charging control circuit and an electronic device. The battery charging control circuit and the electronic device provided by the embodiment comprise: a switching circuit; the starting circuit comprises a first port and a second port, when the positive electrode of the battery is electrically connected with the first port, the negative electrode of the battery is electrically connected with the second port, and the switching circuit is in a cut-off state, the starting circuit and the battery form a first current loop so that the starting circuit generates a starting signal, wherein the current flowing through the battery is a first current; and the controller is used for controlling the switch circuit to be in a conducting state in a delayed mode according to the starting signal so that the starting circuit, the switch circuit and the battery form a second current loop. The starting signal is generated by the first current loop generated by the normal access of the battery, so that the second current loop is started in a delayed manner to charge the battery, and the ignition phenomenon of the battery during charging is avoided.
Description
Technical Field
The present invention relates to the field of battery technologies, and in particular, to a battery charging control circuit and an electronic device.
Background
A battery refers to a device that converts chemical energy into electrical energy in a portion of the space of a cup, tank, or other container or composite container that holds an electrolyte solution and metal electrodes to generate an electrical current. Also, batteries are essential components for the operation of various electronic devices as a source of energy. For example, in the case of an aircraft such as an unmanned aerial vehicle, each system of the unmanned aerial vehicle is provided with electric energy through a battery, so as to ensure the flight of the unmanned aerial vehicle, the aerial photography during the flight, and the like.
In battery applications, a battery protection circuit is usually configured to provide protection functions such as over-discharge, over-charge, over-current, over-temperature, etc. for the battery. There is also a common problem in the use of batteries, namely, ignition due to poor contact during charging.
Disclosure of Invention
An object of the embodiments of the present invention is to provide a battery charging control circuit and an electronic device, which can avoid the sparking phenomenon during charging.
The embodiment of the invention discloses the following technical scheme:
in a first aspect, an embodiment of the present invention provides a battery charging control circuit, including:
a battery charge control circuit comprising:
a switching circuit;
the starting circuit is electrically connected with the switching circuit and comprises a first port and a second port, when the positive electrode of a battery is electrically connected with the first port, the negative electrode of the battery is electrically connected with the second port, and the switching circuit is in a cut-off state, the starting circuit and the battery form a first current loop so that the starting circuit generates a starting signal, wherein the current flowing through the battery is a first current;
and the controller is respectively electrically connected with the switch circuit and the starting circuit and is used for controlling the switch circuit to be in a conducting state in a time delay manner according to the starting signal so as to enable the starting circuit, the switch circuit and the battery to form a second current loop, wherein the current flowing through the battery is a second current, and the second current is greater than the first current.
Optionally, the start-up circuit comprises:
a first current limiting circuit comprising the first port;
the unidirectional conducting circuit is connected with the first current limiting circuit in parallel;
a second current limiting circuit electrically connected to the unidirectional conducting circuit, the second current limiting circuit including the second port;
the first trigger circuit is electrically connected with the second current limiting circuit and the controller respectively;
when the positive electrode of the battery is electrically connected with the first port, the negative electrode of the battery is connected with the second port, and the switch circuit is in a cut-off state, the first current limiting circuit, the second current limiting circuit, the first trigger circuit and the battery form the first current loop, so that the first trigger circuit generates the starting signal;
when the positive electrode of the battery is electrically connected with the first port, the negative electrode of the battery is electrically connected with the second port, and the switch circuit is in a conducting state, the unidirectional conducting circuit, the battery and the switch circuit form the second current loop.
Optionally, when the battery is not electrically connected between the first port and the second port, the second current limiting circuit and the first trigger circuit form a third current loop, wherein the first trigger circuit does not generate the start signal.
Optionally, the first current limiting circuit comprises a first resistor;
one end of the first resistor is the first port, and the other end of the first resistor is electrically connected with the second current limiting circuit and used for being connected to a first power supply.
Optionally, the unidirectional conducting circuit comprises a first diode;
the anode of the first diode is electrically connected with the other end of the first resistor, and the cathode of the first diode is electrically connected with the first port.
Optionally, the second current limiting circuit comprises a second diode, a second resistor and a third resistor;
the anode of the second diode is electrically connected with the anode of the first diode, and the cathode of the second diode is electrically connected with one end of a second resistor;
the other end of the second resistor is electrically connected with one end of the third resistor and the first trigger circuit; and
one end of the third resistor is connected with the second port, and the other end of the third resistor is grounded.
Optionally, the first trigger circuit includes a first optocoupler and a fourth resistor;
one end of the primary side of the first optocoupler is electrically connected with the other end of the second resistor, the other end of the primary side of the first optocoupler is electrically connected with one end of the third resistor, one end of the secondary side of the first optocoupler is electrically connected with one end of the fourth resistor, and the other end of the secondary side of the first optocoupler is grounded; and
one end of the fourth resistor is electrically connected with the controller, and the other end of the fourth resistor is used for being connected with a second power supply.
Optionally, the first trigger circuit includes a first switch tube and a fourth resistor;
the control end of the first switch tube is electrically connected with the other end of the second resistor, one end of the first switch tube is electrically connected with one end of the fourth resistor, and the other end of the first switch tube is electrically connected with the second port; and
one end of the fourth resistor is electrically connected with the controller, and the other end of the fourth resistor is used for being connected with a second power supply.
Optionally, the battery charging control circuit further comprises a reverse connection detection circuit, an input end of the reverse connection detection circuit is electrically connected to the second port, and an output end of the reverse connection detection circuit is electrically connected to the controller;
when the positive electrode of the battery is electrically connected to the second port, the negative electrode of the battery is electrically connected to the first port, and the switch circuit is in the cut-off state, the reverse connection detection circuit is used for responding to the excitation of the battery and generating a reverse connection detection signal, so that the controller controls the switch circuit to be in the cut-off state according to the reverse connection detection signal.
Optionally, the reverse connection detection circuit comprises:
a third current limiting circuit electrically connected to the second port; and
the second trigger circuit is electrically connected with the third current limiting circuit;
when the positive electrode of the battery is electrically connected to the second port, the negative electrode of the battery is electrically connected to the first port, and the switch circuit is in a cut-off state, the third current limiting circuit and the second trigger circuit form a fourth current loop, so that the second trigger circuit generates a reverse connection detection signal.
Optionally, the third current limiting circuit includes a third diode and a fifth resistor;
the anode of the third diode is electrically connected with the second port, and the cathode of the third diode is electrically connected with one end of a fifth resistor; and
the other end of the fifth resistor is electrically connected with the second trigger circuit and is used for being connected with a first power supply.
Optionally, the second trigger circuit includes a second optocoupler and a sixth resistor;
one end of the primary side of the second optocoupler is electrically connected with the other end of the fifth resistor, the other end of the primary side of the second optocoupler is used for being connected with a first power supply, one end of the secondary side of the second optocoupler is electrically connected with one end of the sixth resistor, and the other end of the secondary side of the second optocoupler is grounded; and
one end of the sixth resistor is electrically connected with the controller, and the other end of the sixth resistor is used for being connected with a second power supply.
Optionally, the second trigger circuit comprises: a second switch tube and a sixth resistor;
the control end of the second switching tube is electrically connected with the other end of the fifth resistor, one end of the second switching tube is electrically connected with one end of the sixth resistor, and the other end of the second switching tube is used for being connected with a first power supply;
one end of the sixth resistor is connected with the controller, and the other end of the sixth resistor is used for being connected to a second power supply.
Optionally, the battery charging control circuit further includes a reverse connection prompting circuit, an input end of the reverse connection prompting circuit is electrically connected to the second port, and an output end of the reverse connection prompting circuit is electrically connected to the starting circuit;
when the positive pole of the battery is connected to the second port, the negative pole of the battery is connected to the first port, and the switch circuit is in a cut-off state, the reverse connection prompting circuit is used for responding to the excitation of the battery and generating a reverse connection prompting signal.
Optionally, the reverse connection prompting circuit includes a seventh resistor and a light emitting diode;
one end of the seventh resistor is electrically connected with the second port, and the other end of the seventh resistor is electrically connected with the anode of the light-emitting diode;
and the cathode of the light-emitting diode is electrically connected with the anode of the first diode.
Optionally, the second current limiting circuit further comprises an eighth resistor;
one end of the eighth resistor is electrically connected with the other end of the second resistor, and the other end of the eighth resistor is connected with the second port.
Optionally, the third current limiting circuit further comprises a ninth resistor;
one end of the ninth resistor is electrically connected with the other end of the fifth resistor, and the other end of the ninth resistor is used for being connected with a first power supply.
Optionally, the switching circuit includes a third switching tube and a tenth resistor;
the control end of the third switching tube is electrically connected with the controller, one end of the third switching tube is grounded, and the other end of the third switching tube is connected with the second port;
one end of the tenth resistor is electrically connected with the control end of the third switching tube, and the other end of the tenth resistor is electrically connected with one end of the third switching tube.
In a second aspect, an embodiment of the present invention provides an electronic device, which includes a battery and the battery charging control circuit as described above.
An embodiment of the present invention provides a battery charging control circuit and an electronic device, where the battery charging control circuit includes: a switching circuit; the starting circuit is connected with the switch circuit and comprises a first port and a second port, when the positive electrode of the battery is electrically connected with the first port, the negative electrode of the battery is connected with the second port, and the switch circuit is in a cut-off state, the starting circuit and the battery form a first current loop so that the starting circuit generates a starting signal, wherein the current flowing through the battery is a first current; and the controller is respectively connected with the switch circuit and the starting circuit and is used for controlling the switch circuit to be in a conducting state in a time delay manner according to the starting signal so as to enable the starting circuit, the switch circuit and the battery to form a second current loop, wherein the current flowing through the battery is a second current, and the second current is greater than the first current. The starting signal is generated by the first current loop generated by the normal access of the battery, so that the second current loop is started in a delayed manner to charge the battery, and the ignition phenomenon of the battery during charging is avoided.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural diagram of a battery charging control circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a start-up circuit according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a battery charging control circuit according to an embodiment of the present invention;
fig. 4 is a circuit diagram of another battery charge control circuit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another battery charging control circuit according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a reverse connection detection circuit according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another battery charging control circuit according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 1 is a schematic diagram of an anti-reverse charging circuit of a battery according to an embodiment of the present invention. The battery charging control circuit 100 includes:
a switching circuit 13;
a start circuit 12 electrically connected to the switch circuit 13, wherein the start circuit 12 includes a first port and a second port, and when the positive electrode of the battery is electrically connected to the first port, the negative electrode of the battery is electrically connected to the second port, and the switch circuit 13 is in an off state, the start circuit 12 and the battery form a first current loop so that the start circuit 12 generates a start signal, and a current flowing through the battery is a first current;
and the controller 11 is electrically connected to the switch circuit 13 and the starting circuit 12, and is configured to control the switch circuit to be in a conducting state in a time-delay manner according to the starting signal, so that the starting circuit 12, the switch circuit 13, and the battery form a second current loop, where a current flowing through the battery is a second current, and the second current is greater than the first current.
Specifically, the start circuit 12 and the switch circuit 13 are respectively connected to an I/O port of the controller 11. When the controller 11 detects that the start signal is generated corresponding to the I/O port of the start circuit 12, another charging signal is generated and is output to the switch circuit 13 through the I/O port corresponding to the switch circuit 13 in a delayed manner, so as to control the switch circuit 13 to be in a conducting state. The switch circuit is in an off state before the charging signal sent by the controller 11 is not received. When the positive electrode of the battery is connected to the first port, the negative electrode of the battery is connected to the second port, the switch circuit 13 jumps to a conducting state, one end of the switch circuit is grounded, and the external first power supply of the starting circuit 12 passes through the starting circuit 12 and is connected to one end (the first port) of the battery, so that a second current loop of the starting circuit 12, the battery and the switch circuit 13 is formed.
For example, the start signal is preset to be a high level signal. When a user connects the positive electrode of the battery to the first port of the starting circuit 12 and the negative electrode of the battery to the second port of the starting circuit 12, a starting circuit and a first current loop of the battery are formed, the starting circuit can generate a high-level signal (starting signal) and send the high-level signal to the I/O port of the controller, the controller outputs the high-level signal to the switch circuit 13 through another I/O port in a delayed mode after receiving the starting signal, the switch circuit 13 switches from a cut-off state to a conducting state after receiving the high-level signal, and therefore a second current loop of the starting circuit 12, the battery and the switch circuit 13 is formed, and the battery is in a charging state in the second current loop.
And if the voltage of the first power supply is greater than the voltage of the battery, the second current flowing through the second current loop is greater than the first current flowing through the first current loop.
It should be noted that, when the battery is normally connected to the battery charging control circuit 100 (that is, the positive electrode of the battery is connected to the first port of the starting circuit 12, and the negative electrode of the battery is connected to the second port of the starting circuit 12), the charging control circuit 100 does not immediately charge the battery, but charges the battery after a preset time is delayed after the battery is detected to be normally connected to the battery charging control circuit 100, so as to ensure an ignition phenomenon caused by plugging and unplugging in an electrified state, and improve safety performance.
In addition, when the battery is reversely connected to the battery charging control circuit 100 (i.e. the negative electrode of the battery is connected to the first port of the starting circuit 12, and the positive electrode is connected to the second port of the starting circuit 12), the battery and the starting circuit 12 do not form a loop, and a starting signal is not generated, and the switch circuit 13 is in a cut-off state, so that the battery cannot be charged, the phenomenon of reverse charging of the battery is further avoided, and the safety is improved.
The power input end of the controller 11 is connected to a second power supply, and the power output end is grounded, wherein the second power supply is the power supply voltage of the controller.
It should be noted that the battery may be any type of battery, such as a lithium battery, a cadmium nickel battery, a nickel metal hydride battery, a lead acid battery, and the like. And the battery is formed by connecting a plurality of single batteries in series. The battery is formed by connecting a plurality of single batteries in series so as to meet the power supply requirements of various electric equipment. For example, the power requirement of the motor of an aircraft such as an unmanned aerial vehicle to lift off is met. For example, the battery includes 4 or more than 4 single batteries, and the 4 or more than 4 single batteries are connected in series to meet different power supply requirements. Suitably, the charger for charging the battery has a voltage greater than 16V to ensure proper charging of the battery.
In various embodiments of the present invention, the battery charge control circuit includes: a switching circuit; the starting circuit is connected with the switch circuit and comprises a first port and a second port, when the anode of the battery is connected to the first port, the cathode of the battery is connected to the second port, and the switch circuit is in a cut-off state, the starting circuit and the battery form a first current loop so that the starting circuit generates a starting signal, wherein the current flowing through the battery is a first current; and the controller is respectively connected with the switch circuit and the starting circuit and is used for controlling the switch circuit to be in a conducting state in a time delay manner according to the starting signal so as to enable the starting circuit, the switch circuit and the battery to form a second current loop, wherein the current flowing through the battery is a second current, and the second current is greater than the first current. The starting signal is generated by the first current loop generated by the normal access of the battery, so that the second current loop is started in a delayed manner to charge the battery, and the ignition phenomenon of the battery during charging is avoided.
Fig. 2 is a schematic diagram of a battery charging control circuit according to an embodiment of the present invention. The battery charging control circuit 100 and the starting circuit 12 in the battery charging control circuit 100 according to the embodiment of the present invention will be described in detail with reference to fig. 2 and the above-mentioned embodiments.
As shown in fig. 2, the start-up circuit 12 includes:
a first current limiting circuit 121 including the first port B +;
a unidirectional turn-on circuit 122 connected in parallel to the first current limiting circuit 121;
a second current limiting circuit 123 electrically connected to the unidirectional conducting circuit 122, wherein the second current limiting circuit includes the second port B-;
a first trigger circuit 124 electrically connected to the second current limiting circuit 123 and the controller 11, respectively;
when the positive electrode of the battery is electrically connected to the first port B +, the negative electrode of the battery is connected to the second port B-, and the switching circuit 13 is in the off state, the first current limiting circuit 121, the second current limiting circuit 123, the first trigger circuit 124 and the battery form the first current loop, so that the first trigger circuit 124 generates the start signal;
when the positive electrode of the battery is electrically connected to the first port B +, the negative electrode of the battery is connected to the second port B-, and the switch circuit 13 is in a conducting state, the unidirectional conducting circuit 122, the battery, and the switch circuit 13 form the second current loop.
Specifically, the unidirectional conducting circuit 122 is used for limiting the current to be conducted from the first port B + to the second current limiting circuit 123. The second current limiting circuit 123 is used for limiting the magnitudes of the first current and the second current. The first trigger circuit 124 is configured to generate a start signal according to the voltage in the first current loop and send the start signal to the controller 11.
Optionally, the first current limiting circuit 121 and the second current limiting circuit 123 may be composed of resistors and/or diodes, the unidirectional circuit 122 may be composed of diodes, the first trigger circuit 124 may be composed of an isolation component such as an optical coupling isolator or a switching tube, and the specific setting may be defined according to the user's requirement.
When the positive electrode of the battery is connected to the first port B +, the negative electrode of the battery is connected to the second port B-, and the switching circuit 13 jumps from the off state to the on state after delaying for a preset time; when the negative electrode of the battery is connected to the first port B +, the positive electrode of the battery is connected to the second port B-, the switch circuit 13 is always in a cut-off state; when the battery charging control circuit 100 is not connected to the battery, the switch circuit 13 is in a cut-off state.
Specifically, when the battery is not connected between the first port B + and the second port B-, the second current limiting circuit 123 and the first trigger circuit 124 form a third current loop, wherein the first trigger circuit 124 does not generate the start signal.
When the battery is not electrically connected between the first port B + and the second port B +, the circuit resistance of the third current loop is large, and the current flowing through the first trigger circuit 124 is not enough to enable the first trigger circuit 124 to generate the start signal.
Specifically, referring to fig. 3 and 4, the first current limiting circuit 121 includes: a first resistor R1;
one end of the first resistor R1 is the first port B +, and the other end of the first resistor R1 is electrically connected to the second current limiting circuit 123 and connected to the first Power source.
The first resistor R1 plays a role in current guiding and voltage dividing when forming a first current loop.
Specifically, the unidirectional circuit 122 includes a first diode D1;
an anode of the first diode D1 is electrically connected to the other end of the first resistor R1, and a cathode of the first diode D1 is electrically connected to the first port B +.
The first diode D1 applies a second current directly to the positive electrode of the battery to improve the charging efficiency when forming a second current loop.
It should be noted that the first diode D1 may be any suitable diode. For example, the first diode D1 may be a zener diode of type BZX 384-C16.
Specifically, the second current limiting circuit 123 includes a second diode D2, a second resistor R2, and a third resistor R3;
an anode of the second diode D2 is electrically connected to an anode of the first diode D1, and a cathode is electrically connected to one end of the second resistor R2;
the other end of the second resistor R2 is electrically connected 124 with one end of the third resistor R3 and the first trigger circuit; and
one end of the third resistor R3 is connected with the second port B-, and the other end of the third resistor R3 is grounded.
The second diode D2 plays a role in protection, and the second resistor R2 and the third resistor R3 are used for limiting the current. It should be noted that the resistance of the third resistor R3 is large, so that when the third current loop is formed, the third current is not enough to enable the first trigger circuit 124 to generate the start signal.
Optionally, the second current limiting circuit 123 further includes: an eighth resistor R8;
one end of the eighth resistor R8 is connected with the other end of the second resistor R2, and the other end is connected with the second port B-.
The eighth resistor R8 is for voltage division.
Optionally, the first trigger circuit 124 includes: a first optical coupler U1 and a fourth resistor R4;
one end of the primary side of the first optocoupler U1 is connected with the other end of the second resistor R2, the other end of the primary side of the first optocoupler U1 is connected with one end of the third resistor R3, one end of the secondary side of the first optocoupler U1 is electrically connected with one end of the fourth resistor R4, and the other end of the secondary side of the first optocoupler U1 is grounded; and
one end of the fourth resistor R4 is connected with the controller 11, and the other end of the fourth resistor R4 is connected to a second power supply.
Wherein, the fourth resistor R4 is connected to the port BAT _ Correct of the controller 11. The forward voltage may be 3.3V.
The first optocoupler U1 isolates the controller 11 from the battery charging control circuit, thereby playing a role in protection, and meanwhile, the first optocoupler U1 is further configured to generate a start signal, so as to control the operating state of the switch circuit 13 through the controller 11. The fourth resistor R4 is used for voltage division.
Optionally, the first trigger circuit 124 includes: a first switch tube Q1 and a fourth resistor R4;
a control end of the first switch tube Q1 is electrically connected with the other end of the second resistor R2, one end of a first switch tube Q1 is connected with one end of the fourth resistor R4, and the other end of the first switch tube Q1 is electrically connected with the second port B < - >; and
one end of the fourth resistor R4 is electrically connected with the controller 11, and the other end of the fourth resistor R4 is connected with a forward voltage.
Optionally, the first switching tube Q1 may be a transistor or a MOS tube.
The first switch Q1 isolates the controller 11 from the battery charging control circuit for protection, and the first switch Q1 is further configured to generate an activation signal to control the operating state of the switch circuit 13 through the controller 11. The fourth resistor R4 is used for voltage division.
Specifically, the switching circuit 13 includes: a third switching tube Q3 and a tenth resistor R10;
the control end of the third switching tube Q3 is connected to the controller 11, one end of the third switching tube Q3 is grounded, and the other end of the third switching tube Q3 is connected to the second port. The port VSG of the controller 11 is connected to the control terminal of the third switching tube Q3.
One end of the tenth resistor R10 is connected to the control end of the third switching tube Q3, and the other end of the tenth resistor R10 is connected to one end of the third switching tube Q3.
The third switching tube may be a triode or an MOS tube, a control end of the third switching tube is connected to the controller 11, and when the controller 11 sends the start signal to the third switching tube Q3, the third switching tube Q3 is switched to a conducting state.
The specific charging process is as follows:
the positive electrode of a battery is connected into the first port B +, the negative electrode of the battery is connected into the second port B-, the positive electrode of the battery, the first resistor R1, the second diode D2, the second resistor R2, the first optical coupler U1 or the first switch tube Q1 and the negative electrode of the battery form a first current loop, and the current flow direction of the first current loop is the positive electrode of the battery, the first resistor R1, the second diode D2, the second resistor R2, the first optical coupler U1 or the first switch tube Q1 and the negative electrode of the battery. The first optocoupler U1 or the first switch tube Q1 generates a start signal and sends the start signal to the controller 11, and the controller 11 controls the switch circuit 13 to be switched on in a delayed manner, where the start signal is at a low level, and a first current in the first current loop causes the first optocoupler U1 or the first switch tube Q1 to operate, and pulls down voltages at two ends of a primary side of the first optocoupler U1 or pulls down voltages at two ends of the first switch tube Q1, so that a level detected by an I/O port corresponding to the controller 11 is at a low level, and the controller 11 controls the switch circuit 13 to be in a switched-on state. When the switching circuit 13 is in the on state, a second current loop is formed. The second current loop is first Power, first diode, battery positive pole, battery negative pole, switch circuit, the electric current flow direction of second current loop is first Power, first diode, battery positive pole, battery negative pole, switch circuit, second current loop, second electric current are greater than first electric current, the battery is in charged state.
It should be noted that, when the battery charging control circuit 100 is in a standby state (no battery is connected to the battery charging control circuit 100), a third current loop exists, where the third current loop includes the first Power source Power, the second diode D2, the second resistor R2, and the third resistor R3, and a current flow direction of the third current loop is the first Power source Power, the second diode D2, the first optocoupler U1, the second resistor R2, the third resistor R3, and the ground. Because the resistance of the third resistor R3 is large enough, the current of the third current loop is not enough to drive the first optocoupler U1 to conduct with the first switch tube Q1. Therefore, the switch circuit 13 is in an off state.
In various embodiments of the present invention, the battery charge control circuit includes: a switching circuit; the starting circuit is connected with the switch circuit and comprises a first port and a second port, when the anode of the battery is connected to the first port, the cathode of the battery is connected to the second port, and the switch circuit is in a cut-off state, the starting circuit and the battery form a first current loop so that the starting circuit generates a starting signal, wherein the current flowing through the battery is a first current; and the controller is respectively connected with the switch circuit and the starting circuit and is used for controlling the switch circuit to be in a conducting state in a time delay manner according to the starting signal so as to enable the starting circuit, the switch circuit and the battery to form a second current loop, wherein the current flowing through the battery is a second current, and the second current is greater than the first current. The starting signal is generated by the first current loop generated by the normal access of the battery, so that the second current loop is started in a delayed manner to charge the battery, and the ignition phenomenon of the battery during charging is avoided.
Referring to fig. 5 and the above embodiments, fig. 5 is a schematic diagram of a battery charging control circuit according to an embodiment of the present invention. The following describes the battery charging control circuit 100 according to an embodiment of the present invention in detail with reference to fig. 5.
As shown in fig. 5, the battery charging control circuit 100 further includes a reverse connection detection circuit 14, an input end of the reverse connection detection circuit 14 is connected to the second port B-, and an output end of the reverse connection detection circuit 14 is electrically connected to the controller 11;
when the positive electrode of the battery is connected to the second port B-, the negative electrode of the battery is connected to the first port B +, and the switch circuit 13 is in the off state, the reverse connection detection circuit 14 is configured to generate a reverse connection detection signal in response to the excitation of the battery, so that the controller 11 controls the switch circuit 13 to be in the off state according to the reverse connection detection signal.
Specifically, the reverse connection detection circuit 14 is configured to detect whether the battery is reversely connected to the battery charging control circuit 100 (a negative electrode of the battery is connected to the first port, and a positive electrode of the battery is connected to the second port), and if so, control the switch circuit 13 to be in an off state, so as to prevent the battery from being reversely charged. The output terminal of the reverse connection detection circuit 14 is connected to the I/O port of the controller 11. When the controller 11 receives the reverse connection detection signal sent by the reverse connection detection circuit 14 through the I/O port, the switch circuit 13 is controlled to be in a cut-off state, so as to prevent the battery from being charged reversely.
Specifically, as shown in fig. 6, the reverse connection detection circuit 14 includes:
a third current limiting circuit 141 electrically connected to the second port B-; and
a second trigger circuit 142 electrically connected to the third current limiting circuit 141;
when the positive electrode of the battery is electrically connected to the second port, the negative electrode of the battery is electrically connected to the first port, and the switching circuit 13 is in the off state, the third current limiting circuit 141 and the second trigger circuit 142 form a fourth current loop, so that the second trigger circuit 142 generates a reverse connection detection signal.
One end of the second trigger circuit 142 is connected to a first Power source, and the first Power source is the same as the first Power source connected to the start circuit 12, so as to ensure that no voltage difference exists in the second trigger circuit 142. When the battery is reversely connected (the negative electrode of the battery is connected to the first port B +, and the positive electrode of the battery is connected to the second port B-), the current of the battery flows through the third current limiting circuit 141 and the second trigger circuit 142, so that the second trigger circuit sends a reverse connection detection signal to the controller 11, so that the controller 11 controls the switch circuit 13 to be in a cut-off state. It should be noted that, when the second trigger circuit 142 sends a reverse connection detection signal to the server, even if the activation signal is received, the switch circuit 13 is in an off state, in other words, the priority of the reverse connection detection signal is greater than the priority of the activation signal.
Specifically, referring to fig. 3 and 4, the third current limiting circuit 141 includes: a third diode D3 and a fifth resistor R5;
an anode of the third diode D3 is connected to the second port B-, and a cathode of the third diode D3 is connected to one end of a fifth resistor R5;
the other end of the fifth resistor R5 is electrically connected to the second trigger circuit 142 and is connected to the first Power source.
The third diode D3 and the fifth resistor R5 are used for current limiting and voltage dividing.
Optionally, the third current limiting circuit 141 further includes: a ninth resistor R9;
one end of the ninth resistor R9 is connected with the other end of the fifth resistor R5, and the other end of the ninth resistor R9 is connected with a first Power supply Power.
The ninth resistor R9 is used for voltage division.
Optionally, the second trigger circuit 142 includes: a second optical coupler U2 and a sixth resistor R6;
one end of the primary side of the second optocoupler U2 is electrically connected with the other end of the fifth resistor R5, the other end of the primary side of the second optocoupler U2 is connected with a first Power supply, one end of the secondary side of the second optocoupler U2 is electrically connected with one end of a sixth resistor R6, and the other end of the secondary side of the second optocoupler U2 is grounded;
one end of the sixth resistor R6 is connected with the controller 11, and the other end of the sixth resistor R6 is connected to a second power supply.
One end of the sixth resistor R6 is connected to the port BAT _ Reverse of the controller 11, and the forward voltage may be 3.3V.
Wherein the second power supply may be a 3.3V forward voltage.
The second optical coupler U2 isolates the controller 11 from the power circuit, playing a role in protection, and the second optical coupler U2 is further configured to generate a reverse connection detection signal, so that the controller 11 controls the switch circuit 13 to be in a cut-off state. The sixth resistor R6 is used for voltage division.
Optionally, the second trigger circuit 142 includes: a second switch tube Q2 and a sixth resistor R6;
the control end of the second switch tube Q2 is connected with the other end of the fifth resistor R5, one end of the second switch tube Q2 is electrically connected with one end of the sixth resistor R6, and the other end of the second switch tube Q2 is connected to a first Power supply Power;
one end of the sixth resistor R6 is connected with the controller 11, and the other end of the sixth resistor R6 is connected to a second power supply.
Optionally, the second switching tube Q2 may be a transistor or a MOS tube.
The second switch tube Q2 isolates the controller 11 from the power circuit for protection, and the second switch tube Q2 is further configured to generate a reverse connection detection signal to control the switch circuit 13 to be in a cut-off state through the controller 11. The sixth resistor R6 is used for voltage division.
The specific control process is as follows:
when the positive pole of battery is connected second port B-, the negative pole of battery is connected first port B +, battery positive pole, third diode D3, fifth resistance R5, second opto-coupler U2 or second switch tube Q2 and first Power form fourth current loop, the current flow direction of fourth current loop is battery positive pole, third diode D3, fifth resistance R5, second opto-coupler U2 or second switch tube Q2, first Power. When the fourth current loop is formed, the second optocoupler U2 or the second switching tube Q2 generates a reverse connection detection signal and sends the reverse connection detection signal to the controller 11, so that the controller 11 controls the switching circuit 13 to work in a cut-off state, thereby ensuring that the battery cannot be reversely charged and improving the safety performance.
In various embodiments of the present invention, the battery charge control circuit includes: a switching circuit; the starting circuit is connected with the switch circuit and comprises a first port and a second port, when the anode of the battery is connected to the first port, the cathode of the battery is connected to the second port, and the switch circuit is in a cut-off state, the starting circuit and the battery form a first current loop so that the starting circuit generates a starting signal, wherein the current flowing through the battery is a first current; and the controller is respectively connected with the switch circuit and the starting circuit and is used for controlling the switch circuit to be in a conducting state in a time delay manner according to the starting signal so as to enable the starting circuit, the switch circuit and the battery to form a second current loop, wherein the current flowing through the battery is a second current, and the second current is greater than the first current. The starting signal is generated by the first current loop generated by the normal access of the battery, so that the second current loop is started in a delayed manner to charge the battery, and the ignition phenomenon of the battery during charging is avoided.
Fig. 7 is a schematic diagram of a battery charging control circuit according to an embodiment of the present invention. The following describes the battery charging control circuit 100 according to an embodiment of the present invention in detail with reference to fig. 7.
The battery charging control circuit 100 further comprises a reverse connection prompting circuit 15, an input end of the reverse connection prompting circuit 15 is connected to the second port B-, and an output end of the reverse connection prompting circuit 15 is connected to the starting circuit 12;
when the positive pole of the battery is connected to the second port B-, the negative pole of the battery is connected to the first port B +, and the switch circuit 13 is in the off state, the reverse connection prompting circuit 15 is configured to generate a reverse connection prompting signal in response to the excitation of the battery.
The reverse connection prompt signal may be an optical signal, which is used to prompt the user that the battery is mistakenly connected to the battery charging control circuit 100.
Specifically, referring to fig. 3 and 4, the reverse connection prompting circuit 15 includes: a seventh resistor R7 and a light emitting diode D4;
one end of the seventh resistor R7 is connected with the second port B-, and the other end of the seventh resistor R7 is connected with the anode of the light-emitting diode D4;
the cathode of the light emitting diode D4 is electrically connected with the anode of the first diode D1.
The seventh resistor R7 is used for voltage division and current limiting. The led D4 is used to emit light when the battery is reversely connected to the battery charging control circuit 100 (when the positive pole of the battery is connected to the second port B-, and the negative pole of the battery is connected to the first port B +), so as to prompt the user of the battery access error.
The specific working process is as follows:
when the battery is reversely connected to the battery charging control circuit 100 (when the anode of the battery is connected to the second port B-, the cathode of the battery is connected to the first port B +), the anode of the battery, the seventh resistor R7, the led D4, the first diode and the cathode of the battery form a fifth current loop, the current of the fifth current flows to the anode of the battery, the seventh resistor R7, the led D4, the first diode and the cathode of the battery, and when the fifth current loop is formed, the led D4 emits light to prompt the user of a battery access error.
In various embodiments of the present invention, the battery charge control circuit includes: a switching circuit; the starting circuit is connected with the switch circuit and comprises a first port and a second port, when the anode of the battery is connected to the first port, the cathode of the battery is connected to the second port, and the switch circuit is in a cut-off state, the starting circuit and the battery form a first current loop so that the starting circuit generates a starting signal, wherein the current flowing through the battery is a first current; and the controller is respectively connected with the switch circuit and the starting circuit and is used for controlling the switch circuit to be in a conducting state in a time delay manner according to the starting signal so as to enable the starting circuit, the switch circuit and the battery to form a second current loop, wherein the current flowing through the battery is a second current, and the second current is greater than the first current. The starting signal is generated by the first current loop generated by the normal access of the battery, so that the second current loop is started in a delayed manner to charge the battery, and the ignition phenomenon of the battery during charging is avoided.
Referring to fig. 8, an electronic device 200 according to an embodiment of the present invention includes a battery 300 and the battery charging control circuit 100. The electronic device 200 is used to prevent reverse charging and sparking of a battery, which may be a lithium battery, a nickel-cadmium battery, or other storage batteries, etc. The electronic device 200 includes a battery 300 and the battery charging control circuit 100 as described above, wherein the battery 300 is connected to the battery charging control circuit 100. The battery 300 may be used to provide power to various electronic devices, such as an aircraft (e.g., an unmanned aerial vehicle), an automobile, an electric bicycle, a terminal device, a wearable device, and the like.
In an embodiment of the present invention, the electronic device includes a battery and a battery charging control circuit, and the battery charging control circuit includes: a switching circuit; the starting circuit is connected with the switch circuit and comprises a first port and a second port, when the anode of the battery is connected to the first port, the cathode of the battery is connected to the second port, and the switch circuit is in a cut-off state, the starting circuit and the battery form a first current loop so that the starting circuit generates a starting signal, wherein the current flowing through the battery is a first current; and the controller is respectively connected with the switch circuit and the starting circuit and is used for controlling the switch circuit to be in a conducting state in a time delay manner according to the starting signal so as to enable the starting circuit, the switch circuit and the battery to form a second current loop, wherein the current flowing through the battery is a second current, and the second current is greater than the first current. The starting signal is generated by the first current loop generated by the normal access of the battery, so that the second current loop is started in a delayed manner to charge the battery, and the ignition phenomenon of the battery during charging is avoided.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (18)
1. A battery charge control circuit, comprising:
a switching circuit;
the starting circuit is electrically connected with the switching circuit and comprises a first port and a second port, when the positive electrode of a battery is electrically connected with the first port, the negative electrode of the battery is electrically connected with the second port, and the switching circuit is in a cut-off state, the starting circuit and the battery form a first current loop so that the starting circuit generates a starting signal, wherein the current flowing through the battery is a first current;
the controller is respectively electrically connected with the switch circuit and the starting circuit and is used for controlling the switch circuit to be in a conducting state in a delayed mode according to the starting signal so as to enable the starting circuit, the switch circuit and the battery to form a second current loop, wherein the current flowing through the battery is a second current, and the second current is larger than the first current;
the start-up circuit includes:
a first current limiting circuit comprising the first port;
the unidirectional conducting circuit is connected with the first current limiting circuit in parallel;
a second current limiting circuit electrically connected to the unidirectional conducting circuit, the second current limiting circuit including the second port;
the first trigger circuit is electrically connected with the second current limiting circuit and the controller respectively;
when the positive electrode of the battery is electrically connected with the first port, the negative electrode of the battery is connected with the second port, and the switch circuit is in a cut-off state, the first current limiting circuit, the second current limiting circuit, the first trigger circuit and the battery form the first current loop, so that the first trigger circuit generates the starting signal;
when the positive electrode of the battery is electrically connected with the first port, the negative electrode of the battery is electrically connected with the second port, and the switch circuit is in a conducting state, the unidirectional conducting circuit, the battery and the switch circuit form the second current loop.
2. The battery charge control circuit of claim 1,
when the battery is not electrically connected between the first port and the second port, the second current limiting circuit and the first trigger circuit form a third current loop, wherein the first trigger circuit does not generate the start signal.
3. The battery charge control circuit of claim 2, wherein the first current limiting circuit comprises a first resistor;
one end of the first resistor is the first port, and the other end of the first resistor is electrically connected with the second current limiting circuit and used for being connected to a first power supply.
4. The battery charge control circuit of claim 3, wherein the unidirectional conducting circuit comprises a first diode;
the anode of the first diode is electrically connected with the other end of the first resistor, and the cathode of the first diode is electrically connected with the first port.
5. The battery charge control circuit of claim 4, wherein the second current limiting circuit comprises a second diode, a second resistor, and a third resistor;
the anode of the second diode is electrically connected with the anode of the first diode, and the cathode of the second diode is electrically connected with one end of the second resistor;
the other end of the second resistor is electrically connected with one end of the third resistor and the first trigger circuit; and
one end of the third resistor is electrically connected with the second port, and the other end of the third resistor is grounded.
6. The battery charge control circuit of claim 5, wherein the first trigger circuit comprises a first optocoupler and a fourth resistor;
one end of the primary side of the first optocoupler is electrically connected with the other end of the second resistor, the other end of the primary side of the first optocoupler is electrically connected with one end of the third resistor, one end of the secondary side of the first optocoupler is electrically connected with one end of the fourth resistor, and the other end of the secondary side of the first optocoupler is grounded; and
one end of the fourth resistor is electrically connected with the controller, and the other end of the fourth resistor is used for being connected with a second power supply.
7. The battery charging control circuit of claim 5, wherein the first trigger circuit comprises a first switch tube and a fourth resistor;
the control end of the first switch tube is electrically connected with the other end of the second resistor, one end of the first switch tube is electrically connected with one end of the fourth resistor, and the other end of the first switch tube is electrically connected with the second port; and
one end of the fourth resistor is electrically connected with the controller, and the other end of the fourth resistor is used for being connected with a second power supply.
8. The battery charge control circuit according to any one of claims 1 to 7,
the battery charging control circuit further comprises a reverse connection detection circuit, wherein the input end of the reverse connection detection circuit is electrically connected to the second port, and the output end of the reverse connection detection circuit is electrically connected with the controller;
when the positive electrode of the battery is electrically connected to the second port, the negative electrode of the battery is electrically connected to the first port, and the switch circuit is in the cut-off state, the reverse connection detection circuit is used for responding to the excitation of the battery and generating a reverse connection detection signal, so that the controller controls the switch circuit to be in the cut-off state according to the reverse connection detection signal.
9. The battery charge control circuit of claim 8, wherein the reverse connection detection circuit comprises:
a third current limiting circuit electrically connected to the second port; and
the second trigger circuit is electrically connected with the third current limiting circuit;
when the positive electrode of the battery is electrically connected to the second port, the negative electrode of the battery is electrically connected to the first port, and the switch circuit is in a cut-off state, the third current limiting circuit and the second trigger circuit form a fourth current loop, so that the second trigger circuit generates a reverse connection detection signal.
10. The battery charge control circuit of claim 9, wherein the third current limiting circuit comprises a third diode and a fifth resistor;
the anode of the third diode is electrically connected with the second port, and the cathode of the third diode is electrically connected with one end of a fifth resistor; and
the other end of the fifth resistor is electrically connected with the second trigger circuit and is used for being connected with a first power supply.
11. The battery charge control circuit of claim 10, wherein the second trigger circuit comprises a second optocoupler and a sixth resistor;
one end of the primary side of the second optocoupler is electrically connected with the other end of the fifth resistor, the other end of the primary side of the second optocoupler is used for being connected with the first power supply, one end of the secondary side of the second optocoupler is electrically connected with one end of the sixth resistor, and the other end of the secondary side of the second optocoupler is grounded; and
one end of the sixth resistor is electrically connected with the controller, and the other end of the sixth resistor is used for being connected with a second power supply.
12. The battery charging control circuit of claim 10, wherein the second trigger circuit comprises a second switch tube and a sixth resistor;
the control end of the second switching tube is electrically connected with the other end of the fifth resistor, one end of the second switching tube is electrically connected with one end of the sixth resistor, and the other end of the second switching tube is used for being connected to the first power supply;
one end of the sixth resistor is electrically connected with the controller, and the other end of the sixth resistor is used for being connected with a second power supply.
13. The battery charge control circuit of claim 4,
the battery charging control circuit also comprises a reverse connection prompting circuit, wherein the input end of the reverse connection prompting circuit is electrically connected to the second port, and the output end of the reverse connection prompting circuit is electrically connected with the starting circuit;
when the positive pole of the battery is connected to the second port, the negative pole of the battery is connected to the first port, and the switch circuit is in a cut-off state, the reverse connection prompting circuit is used for responding to the excitation of the battery and generating a reverse connection prompting signal.
14. The battery charge control circuit of claim 13, wherein the reverse connection prompting circuit comprises a seventh resistor and a light emitting diode;
one end of the seventh resistor is electrically connected with the second port, and the other end of the seventh resistor is electrically connected with the anode of the light-emitting diode;
and the cathode of the light-emitting diode is electrically connected with the anode of the first diode.
15. The battery charge control circuit of claim 5, wherein the second current limiting circuit further comprises an eighth resistor;
one end of the eighth resistor is electrically connected with the other end of the second resistor, and the other end of the eighth resistor is connected with the second port.
16. The battery charge control circuit of claim 10, wherein the third current limiting circuit further comprises a ninth resistor;
one end of the ninth resistor is electrically connected with the other end of the fifth resistor, and the other end of the ninth resistor is used for being connected to the first power supply.
17. The battery charge control circuit according to any of claims 9-16, wherein the switching circuit comprises a third switching tube and a tenth resistor;
the control end of the third switching tube is electrically connected with the controller, one end of the third switching tube is grounded, and the other end of the third switching tube is connected with the second port;
one end of the tenth resistor is electrically connected with the control end of the third switching tube, and the other end of the tenth resistor is electrically connected with one end of the third switching tube.
18. An electronic device comprising a battery and the battery charge control circuit of any of claims 1-17, the battery being connected to the battery charge control circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910784850.8A CN110380492B (en) | 2019-08-23 | 2019-08-23 | Battery charging control circuit and electronic equipment |
| PCT/CN2020/110589 WO2021036946A1 (en) | 2019-08-23 | 2020-08-21 | Battery charging control circuit and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910784850.8A CN110380492B (en) | 2019-08-23 | 2019-08-23 | Battery charging control circuit and electronic equipment |
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| CN110380492B true CN110380492B (en) | 2021-03-02 |
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| CN110380492B (en) * | 2019-08-23 | 2021-03-02 | 深圳市道通智能航空技术有限公司 | Battery charging control circuit and electronic equipment |
| CN112366790A (en) * | 2020-11-19 | 2021-02-12 | 深圳市华思旭科技有限公司 | Intelligent connecting device, starting power supply and storage battery clamp |
| CN114123434B (en) * | 2022-01-27 | 2022-04-15 | 深圳市高端无人机有限公司 | Power supply circuit and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1138768A (en) * | 1995-06-20 | 1996-12-25 | 明碁电脑股份有限公司 | Battery charger |
| US20080239603A1 (en) * | 2007-03-27 | 2008-10-02 | Eaglepicher Energy Products Corporation | Battery protection circuit for lithium cabon monofluoride battery |
| CN102856961A (en) * | 2012-09-25 | 2013-01-02 | 重庆永通信息工程实业有限公司 | Startup battery protection module |
| CN203481904U (en) * | 2013-09-24 | 2014-03-12 | 漳州市东方智能仪表有限公司 | Charger with battery reverse connection detection and protection functions |
| CN205489605U (en) * | 2016-01-14 | 2016-08-17 | 深圳市创维群欣安防科技股份有限公司 | Time delay starting circuit and mobile unit |
| CN106600853B (en) * | 2016-12-06 | 2019-06-18 | 青岛海信智能商用系统股份有限公司 | Charging or signal transmission preventing jittering circuit and charging base for charging base |
| CN206742898U (en) * | 2017-04-12 | 2017-12-12 | 深圳市金欣辉电子科技有限公司 | Charger baby discharge circuit |
| CN107134825A (en) * | 2017-05-09 | 2017-09-05 | 宇能电气有限公司 | A kind of storage battery reverse connection protection circuit based on adaptive charging technique |
| CN109910797B (en) * | 2019-03-07 | 2020-12-29 | 深圳市电将军科技有限公司 | Emergency intelligent storage battery wire clamp for one-key starting automobile and automobile starting and lighting method |
| CN110311453A (en) * | 2019-08-20 | 2019-10-08 | 广东利元亨智能装备股份有限公司 | Reverse battery protection circuit |
| CN110380492B (en) * | 2019-08-23 | 2021-03-02 | 深圳市道通智能航空技术有限公司 | Battery charging control circuit and electronic equipment |
-
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| WO2021036946A1 (en) | 2021-03-04 |
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