CN211790898U - Charging control circuit and charging control device - Google Patents
Charging control circuit and charging control device Download PDFInfo
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- CN211790898U CN211790898U CN202020516588.7U CN202020516588U CN211790898U CN 211790898 U CN211790898 U CN 211790898U CN 202020516588 U CN202020516588 U CN 202020516588U CN 211790898 U CN211790898 U CN 211790898U
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Abstract
The utility model provides a charging control circuit and a charging control device, wherein the charging control circuit comprises a DC power supply input end, a DC power supply output end connected with an electricity storage module, a controller, a drive switch circuit and a charging switch circuit; the signal output end of the controller is connected with the input end of the driving switch circuit, and the output end of the driving switch circuit is connected with the controlled end of the charging switch circuit; the input end of the charging switch circuit is connected with the input end of the direct-current power supply, and the output end of the charging switch circuit is connected with the output end of the direct-current power supply. The technical scheme of the utility model, can avoid the electric storage module overcharge.
Description
Technical Field
The utility model relates to a technical field that charges, in particular to charge control circuit and charge control device.
Background
Generally, in the design of a charger and a battery pack, the charger has a charging protection function, and the battery pack has a protection board to perform the charging and discharging protection function, but some manufacturers delete the protection board of the battery pack to save cost, and concentrate a charging protection module in the charger, and the charging scheme has high design requirements on the charging protection of the charger.
In the charging control circuits of most chargers, the charging loop is often controlled and protected by the controller, but various factors such as environment, electrostatic discharge, and collision can affect the normal operation of the single chip microcomputer, for example, the charger controller is damaged or software is crashed, under the condition, even if the charging of the battery pack reaches a saturation state, the controller still controls the charging loop to be kept on to continue charging the battery pack, so that the battery pack is overcharged.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electric control circuit and charge control device aims at solving because the controller leads to the problem that the battery package overcharged unusually.
In order to achieve the above object, the present invention provides a charging control circuit, which includes a dc power input terminal, a dc power output terminal for connecting with an electricity storage module, a controller, a driving switch circuit, and a charging switch circuit;
the signal output end of the controller is connected with the input end of the driving switch circuit, and the output end of the driving switch circuit is connected with the controlled end of the charging switch circuit;
the input end of the charging switch circuit is connected with the input end of the direct-current power supply, and the output end of the charging switch circuit is connected with the output end of the direct-current power supply;
the driving switch circuit is used for outputting a turn-off signal to the charging switch circuit according to an abnormal signal when receiving the abnormal signal output by the controller;
the charging switch circuit is used for being cut off according to the turn-off signal so as to disconnect the electric connection between the input end of the direct current power supply and the output end of the direct current power supply, and the electricity storage module stops storing electricity.
Optionally, the driving switch circuit includes a first capacitor, a second capacitor, a first resistor, a second resistor, a first transistor, and a bidirectional conducting module;
the first end of the first capacitor is an input end of the driving switch circuit, the second end of the first capacitor is connected with the first end of the bidirectional conduction module, and the second end of the bidirectional conduction module is connected with the first end of the first resistor;
the second end of the first resistor is connected with the first end of the second capacitor, the first end of the second resistor and the first end of the first transistor; the third end of the bidirectional conduction module, the second end of the second capacitor, the second end of the second resistor and the third end of the first transistor are connected with a system ground; the second end of the first transistor is the output end of the driving switch circuit.
Optionally, the bidirectional conduction module includes a bidirectional switch diode, a first end of the bidirectional switch diode is a first end of the bidirectional conduction module, a second end of the bidirectional switch diode is a second end of the bidirectional conduction module, and a third end of the bidirectional switch diode is a third end of the bidirectional conduction module.
Optionally, the bidirectional conduction module includes a first diode and a second diode, a common end of the first diode and the second diode is a first end of the bidirectional conduction module, a cathode of the first diode is a second end of the bidirectional conduction module, and an anode of the second diode is a third end of the bidirectional conduction module.
Optionally, the first transistor is an N-type insulating field effect transistor, a gate of the N-type insulating field effect transistor is a first end of the first transistor, a drain of the N-type insulating field effect transistor is a second end of the first transistor, and a source of the N-type insulating field effect transistor is a third end of the first transistor.
Optionally, the charging switch circuit includes a third resistor, a fourth resistor, a zener diode, and a second transistor;
a first end of the fourth resistor is a controlled end of the charging switch circuit, and a second end of the fourth resistor is connected with a first end of the second transistor, an anode of the voltage stabilizing diode and a first end of the third resistor;
the second end of the second transistor is the input end of the charging switch circuit and is connected with the cathode of the voltage stabilizing diode and the second end of the third resistor, and the third end of the second transistor is the output end of the charging switch circuit.
Optionally, the second transistor is a P-type insulating field effect transistor, a gate of the P-type insulating field effect transistor is a first end of the second transistor, a source of the P-type insulating field effect transistor is a second end of the second transistor, and a drain of the P-type insulating field effect transistor is a third end of the second transistor.
Optionally, the charging control circuit further includes a transformer and a rectifying and filtering circuit;
the input end of the rectification filter circuit is connected with one end of the secondary coil of the transformer, and the output end of the rectification filter circuit is the input end of the direct-current power supply.
Optionally, the controller is a single chip microcomputer.
In order to achieve the above object, the present invention provides a charging control device, which includes the charging control circuit as described above.
The technical scheme of the utility model, when the controller abnormal conditions appeared, the controller can export abnormal signal to drive switch circuit, drive switch circuit then produces turn-off signal and exports to the charging switch circuit according to the abnormal signal of controller output, switch into the off-state by the on-state with control charging switch circuit, when charging switch circuit ends, the electric connection disconnection of DC power supply input and DC power supply output, DC power supply output stops exporting DC voltage to the electricity storage module, make the electricity storage module stop charging, thereby can avoid the problem that the electricity storage module appears overcharging when the controller is unusual.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a block diagram of a circuit structure of an embodiment of the charging control circuit of the present invention;
fig. 2 is a schematic circuit diagram of a charging control circuit according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of an embodiment of the bidirectional conducting module in FIG. 2;
FIG. 4 is a schematic circuit diagram of another embodiment of the bidirectional conducting module shown in FIG. 2;
fig. 5 is a schematic circuit diagram of an embodiment of the charge switch circuit in fig. 1.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Fig. 1 is a block diagram of a charging control circuit according to an embodiment of the present invention.
Referring to fig. 1, the charging control circuit includes a dc power input terminal, a dc power output terminal connected to the positive electrode of the power storage module 50, a controller 10, a driving switch circuit 20, and a charging switch circuit 30; wherein the content of the first and second substances,
the signal output end of the controller 10 is connected to the input end of the driving switch circuit 20, and the output end of the driving switch circuit 20 is connected to the controlled end of the charging switch circuit 30; the input terminal of the charging switch circuit 30 is connected to the input terminal of the dc power supply, and the output terminal of the charging switch circuit 30 is connected to the output terminal of the dc power supply.
The controller 10 may be a single chip microcomputer, or a microprocessor such as a DSP or an FPGA. In this embodiment, when the controller 10 operates normally, the electrical signal output by the controller 10 to the driving switch circuit 20 is a PWM pulse signal, and when the controller operates abnormally, the electrical signal output by the controller 10 to the driving switch circuit 20 is an abnormal signal, that is, a non-PWM pulse signal.
The driving switch circuit 20 is configured to generate a shutdown signal according to the abnormal signal output by the controller 10 and output the shutdown signal to the charging switch circuit 30 when receiving the abnormal signal output by the controller 10.
The charging switch circuit 30 has two states of on and off, and the charging switch circuit 30 is turned off when receiving the turn-off signal output by the driving switch circuit 20, that is, the on state is switched to the off state, so as to disconnect the electrical connection between the dc power input terminal and the dc power output terminal, and stop the dc power output terminal from outputting the dc voltage to the power storage module 50, so that the power storage module 50 stops storing power, that is, stops charging the power storage module 50.
In this embodiment, the charging control circuit is applied to a charger, and further includes a transformer (not shown), and a rectifying and filtering circuit 40, wherein a first end a1 of a secondary coil of the transformer is connected to an input end of the rectifying and filtering circuit 40, an output end of the rectifying and filtering circuit 40 is an input end of the dc power supply, that is, an output end of the rectifying and filtering circuit 40 is connected to an input end of the charging switch circuit 30, an output end of the charging switch circuit 30 is connected to an anode C + of the charger, the anode C + of the charger is an output end of the dc power supply, and the anode C + of the charger is used for being connected to an anode P + of the power storage module 50; and the second end a2 of the secondary winding of the transformer is connected to the negative C-of the charger, which is used to connect to the negative P-of the power storage module 50, so that the power storage module 50 forms a complete charging loop, and the power storage module 50 can be a battery pack, but is not limited thereto, and can be other rechargeable modules.
The specific working principle is as follows: when the controller 10 operates normally, the output electrical signal is a PWM pulse signal, and when the driving switch circuit 20 receives the PWM pulse signal output by the controller 10, it generates a conducting signal through the coupling shaping function of its internal components and outputs the conducting signal to the controlled end of the charging switch circuit 30, where the conducting signal may be a low-level electrical signal. When the charging switch circuit 30 receives the on signal, the charging switch circuit 30 maintains the on state, the input end of the dc power supply is electrically connected to the output end of the dc power supply, the pulse voltage output by the transformer is converted into a dc voltage through the rectifying and filtering circuit 40, and the dc voltage charges the power storage module 50 through the on charging switch circuit 30.
When the controller 10 operates abnormally, it no longer outputs the PWM pulse signal normally but outputs an abnormal signal, which may be a constant high level or a constant low level; at this time, the driving switch circuit 20 generates a turn-off signal, which may be selected as a high-level electrical signal, to the controlled terminal of the charging switch circuit 30 under the cooperative action of the internal components of the driving switch circuit 20. When the charging switch circuit 30 receives the turn-off signal, the charging switch circuit 30 is switched from the on state to the off state, so that the electrical connection between the dc power input terminal and the dc power output terminal is disconnected, no dc voltage is input to the power storage module 50, and the power storage module 50 stops charging. With this arrangement, it is possible to prevent the electric storage module 50 from being overcharged when the controller 10 is abnormally operated. That is, when the controller 10 operates abnormally, the driving switch circuit 20 generates a turn-off signal according to the abnormal signal output by the controller 20 and outputs the turn-off signal to the charging switch circuit 30 to control the charging switch circuit 30 to be switched from the on state to the off state, and the electric connection between the dc power input terminal and the dc power output terminal is disconnected, so that the electric storage module 50 cannot continue to be charged, and the phenomenon of overcharge of the electric storage module 50 is avoided.
The technical scheme of the utility model, when the abnormal conditions appeared in controller 10, controller 10 can export abnormal signal to drive switch circuit 20, drive switch circuit 20 then produces turn-off signal and exports to charging switch circuit 30 according to the abnormal signal of controller 10 output, switch circuit 30 switches into the off-state by the on-state with control charging, when charging switch circuit 30 ends, the electric connection disconnection of DC power supply input and DC power supply output, DC power supply output stops exporting DC voltage to accumulate module 50, make accumulate module 50 stop charging, thereby can avoid accumulating module 50 when controller 10 is unusual and appear the problem of overcharging.
In an embodiment, referring to fig. 2, the driving switch circuit 20 includes a first capacitor C1, a second capacitor C2, a first resistor R1, a second resistor R2, a first transistor Q1, and a bidirectional conducting module 201;
a first end of the first capacitor C1 is an input end of the driving switch circuit 20, that is, a first end of the first capacitor C1 is connected to a signal output end of the controller 10, a second end of the first capacitor C1 is connected to the first end 1 of the bidirectional conducting module 201, and a second end 2 of the bidirectional conducting module 201 is connected to the first end of the first resistor R1;
a second terminal of the first resistor R1 is connected to the first terminal of the second capacitor C2, the first terminal of the second resistor R2, and the first terminal of the first transistor Q1; the third terminal 3 of the bidirectional conducting module 201, the second terminal of the second capacitor C2, the second terminal of the second resistor R2, and the third terminal of the first transistor Q1 are all connected to the system ground GND; and the second terminal of the first transistor Q1 is the output terminal of the driving switch circuit 20, i.e., the second terminal of the first transistor Q1 is connected to the controlled terminal of the charging switch circuit 30.
The specific working principle is as follows: when the controller 10 operates normally, the output electrical signal is a PWM pulse signal. When the pulse signal output by the controller 10 is at a high level, the high-level electrical signal charges the second capacitor C2 through the first capacitor C1, the 1-2 path of the bidirectional conducting module 201 (i.e., the path formed by the first terminal 1 and the second terminal 2 of the bidirectional conducting module 201), and the first resistor R1; when the pulse signal outputted by the controller 10 is at a low level, the low-level electrical signal discharges the second capacitor C2 through the system ground GND, the 3-1 path of the bidirectional conductive module 201 (i.e., the path formed by the third terminal 3 and the first terminal 1 of the bidirectional conductive module 201), the first capacitor C1 and the signal output terminal of the controller 10, so that a constant high level is formed at the first terminal of the first transistor Q1, and the first transistor Q1 is turned on. That is, the PWM pulse signal outputted from the signal output terminal of the controller 10 is shaped by coupling to form a constant high level at the first terminal of the first transistor Q1, so that the first transistor Q1 is turned on. When the first transistor Q1 is turned on, the controlled terminal of the charging switch circuit 30 receives the turn-on signal, that is, the controlled terminal of the charging switch circuit 30 is at a low level, the charging switch circuit 30 is turned on, the dc power input terminal is electrically connected to the dc power output terminal, and the electric energy provided by the transformer is used for charging the power storage module 50 through the rectifying and filtering circuit 40 and the charging switch circuit 30.
When the controller 10 operates abnormally, it no longer outputs the PWM pulse signal normally but outputs an abnormal signal, which may be a constant high level or a constant low level; at this time, due to the isolation of the dc current by the first capacitor C1, the constant high level or the constant low level output by the controller 10 cannot be transmitted to the back-end circuit, in this case, the first terminal of the first transistor Q1 maintains the constant low level, and the first transistor Q1 is turned off. When the first transistor Q1 is turned off, the controlled terminal of the charging switch circuit 30 receives the turn-off signal, that is, the controlled terminal of the charging switch circuit 30 is at a high level, at this time, the charging switch circuit 30 is turned off, the electrical connection between the dc power input terminal and the dc power output terminal is disconnected, no dc voltage is input to the power storage module 50, and the power storage module 50 stops charging, so that the overcharge of the power storage module 50 when the controller 10 operates abnormally can be avoided. That is to say, when the controller 10 operates abnormally, the driving switch circuit 20 generates a turn-off signal according to the abnormal signal output by the controller 20 and outputs the turn-off signal to the charging switch circuit 30, so as to control the charging switch circuit 30 to be switched from the on state to the off state, so that the electrical connection between the dc power input end and the dc power output end is disconnected, the dc power output end stops outputting the dc voltage to the power storage module 50, and the power storage module 50 cannot continue to be charged, thereby avoiding the overcharge of the power storage module 50.
The first resistor R1 is an isolation resistor, the second resistor R2 is an electrostatic protection resistor, the first capacitor C1 is a coupling capacitor, and the second capacitor C2 is an energy storage capacitor.
In this embodiment, the first transistor Q1 is an N-type mosfet, the gate of the N-type mosfet is the first terminal of the first transistor Q1, the drain of the N-type mosfet is the second terminal of the first transistor Q1, and the source of the N-type mosfet is the third terminal of the first transistor Q1. In other embodiments, the first transistor Q1 may also be an NPN transistor or other transistor, which is not limited herein.
The bidirectional conducting module 201 may be composed of a bidirectional switching diode D, and the circuit structure is as shown in fig. 3, where the bidirectional switching diode D is a semiconductor switching device whose forward current-voltage characteristic and reverse current-voltage characteristic are symmetric, and both the forward direction and the reverse direction have negative resistance; it has two states of on and off in both forward and reverse operation. Specifically, the first end of the bidirectional switch diode D is the first end 1 of the bidirectional conduction module 201, that is, the first end of the bidirectional switch diode D is connected to the first capacitor C1; the second end of the bidirectional switch diode D is the second end 2 of the bidirectional conduction module 201, that is, the second end of the bidirectional switch diode D is connected to the first resistor R1; the third terminal of the bidirectional switch diode D is the third terminal 3 of the bidirectional switch module 201, that is, the third terminal of the bidirectional switch diode D, the second terminal of the second capacitor C2, the second terminal of the second resistor R2, and the third terminal of the first transistor Q1 are all connected to the system ground GND.
In other embodiments, as shown in fig. 4, the bidirectional conducting module 201 may also be composed of a first diode D1 and a second diode D2, i.e., two independent diodes. The common terminal of the first diode D1 and the second diode D2 is the first terminal 1 of the bidirectional conducting module 201, i.e. the anode of the first diode D1 and the cathode of the second diode D2 are both connected to the first capacitor C1; the cathode of the first diode D1 is the second end 2 of the bidirectional conducting module 201, i.e. the cathode of the first diode D1 is connected to the first resistor R1; the anode of the second diode D2 is the third terminal 3 of the bidirectional conducting module 201, i.e., the anode of the second diode D2, the second terminal of the second capacitor C2, the second terminal of the second resistor R2, and the third terminal of the first transistor Q1 are all connected to the system ground GND.
The technical scheme of the utility model, when the abnormal conditions appeared in controller 10, controller 10 can export abnormal signal to drive switch circuit 20, drive switch circuit 20 then produces turn-off signal and exports to charging switch circuit 30 according to the abnormal signal of controller 10 output, switch circuit 30 switches into the off-state by the on-state with control charging, when charging switch circuit 30 ends, the electric connection disconnection of DC power supply input and DC power supply output, DC power supply output stops exporting DC voltage to accumulate module 50, make accumulate module 50 stop charging, thereby can avoid accumulating module 50 when controller 10 is unusual and appear the problem of overcharging.
In one embodiment, referring to fig. 5, the charging switch circuit 30 includes a third resistor R3, a fourth resistor R4, a zener diode T, and a second transistor Q2;
a first end of the fourth resistor R4 is a controlled end of the charging switch circuit 30, and a second end of the fourth resistor R4 is connected to the first end of the second transistor Q2, the anode of the zener diode T, and the first end of the third resistor R3; the second terminal of the second transistor Q2 is the input terminal of the charging switch circuit 30, and the second terminal of the second transistor Q2 is connected to the cathode of the zener diode T and the second terminal of the third resistor R3, and the third terminal of the second transistor Q2 is the output terminal of the charging switch circuit 30.
Optionally, the second transistor Q2 is a P-type isolation fet, a gate of the P-type isolation fet is a first terminal of the second transistor Q2, a source of the P-type isolation fet is a second terminal of the second transistor Q2, and a drain of the P-type isolation fet is a third terminal of the second transistor Q2.
The specific working principle is as follows: when the controller 10 operates normally, the output electrical signal is a PWM pulse signal. The PWM pulse signal is applied to the driving switch circuit 20, so that the driving switch circuit 20 generates a constant on signal, which may be an electrical signal at a low level, and outputs the constant on signal to the controlled terminal of the second transistor Q2, thereby turning on the second transistor Q2. When the second transistor Q2 is in a conducting state, the dc power input terminal is electrically connected to the dc power output terminal through the second transistor Q2, and the electric energy provided by the transformer is charged into the power storage module 50 through the rectifying and filtering circuit 40 and the second transistor Q2.
When the controller 10 operates abnormally, it no longer outputs the PWM pulse signal normally but outputs an abnormal signal, which may be a constant high level or a constant low level; at this time, under the cooperative action of the internal components of the driving switch circuit 20, the driving switch circuit 20 generates a turn-off signal, which may be selected as an electrical signal with a high level, to the controlled terminal of the second transistor Q2. When the second transistor Q2 receives the off signal, the second transistor Q2 is switched from the on state to the off state, so that the electrical connection between the dc power input terminal and the dc power output terminal is disconnected. At this time, the dc power output end stops outputting the dc voltage to the electricity storage module 50, so that the electricity storage module 50 stops charging, thereby preventing the electricity storage module 50 from being overcharged when the controller 10 operates abnormally. The zener diode T is configured to prevent the second transistor Q2 from being damaged, that is, to ensure that the gate of the P-type insulating fet is in an operating range with respect to the voltage Vgs of the source, so as to prevent the P-type insulating fet from being damaged by overvoltage.
In order to better illustrate the inventive concepts of the present application, the inventive concepts of the present application are illustrated below with reference to fig. 1 and 5:
the specific working principle of this application does: when the controller 10 operates normally, the output electrical signal is a PWM pulse signal. When the pulse signal output by the controller 10 is at a high level, the high-level electrical signal charges the second capacitor C2 through the first capacitor C1, the 1-2 path of the bidirectional conducting module 201, and the first resistor R1; when the pulse signal output by the controller 10 is at a low level, the low-level electrical signal discharges the second capacitor C2 through the system ground GND, the 3-1 path of the bidirectional conducting module 201, the first capacitor C1 and the signal output terminal of the controller 10, thereby forming a constant high level at the first terminal of the first transistor Q1, so that the first transistor Q1 maintains a conducting state. That is, the PWM pulse signal outputted from the signal output terminal of the controller 10 is shaped by coupling to form a constant high level at the first terminal of the first transistor Q1, so that the first transistor Q1 is turned on. When the first transistor Q1 is turned on, the controlled terminal of the second transistor Q2 is at a low level, the second transistor Q2 is turned on, the dc power input terminal is electrically connected to the dc power output terminal through the second transistor Q2, and the electric energy provided by the transformer is used to charge the power storage module 50 through the rectifier filter circuit 40 and the second transistor Q2.
When the controller 10 operates abnormally, it no longer outputs the PWM pulse signal normally but outputs an abnormal signal, which may be a constant high level or a constant low level; at this time, due to the isolation of the dc current by the first capacitor C1, the constant high level or the constant low level output by the controller 10 cannot be transmitted to the back-end circuit, in this case, the first terminal of the first transistor Q1 maintains the constant low level, and the first transistor Q1 is turned off. When the first transistor Q1 is turned off, the controlled terminal of the second transistor Q2 is at a high level, and at this time, the second transistor Q2 is also in an off state. When the second transistor Q2 is turned off, the dc power input terminal is electrically disconnected from the dc power output terminal, the dc power output terminal stops outputting the dc voltage to the power storage module 50, and the power storage module 50 stops charging, so that the power storage module 50 is prevented from being overcharged when the controller 10 operates abnormally. That is, when the controller 10 operates abnormally, the driving switch circuit 20 generates an off signal according to the abnormal signal output by the controller 20 and outputs the off signal to the second transistor Q2 to control the second transistor Q2 to switch from the on state to the off state, and the electric connection between the dc power input terminal and the dc power output terminal is disconnected to disable the continuous charging of the power storage module 50, thereby avoiding the overcharge of the power storage module 50.
The utility model also provides a charge control device, this charge control device includes as above charge control circuit. The detailed structure of the charge control circuit can refer to the above embodiments, and is not described herein again; it can be understood that, because the utility model discloses an above-mentioned charge control circuit has been used among the charge control device, consequently, the utility model discloses charge control device's embodiment includes all technical scheme of the whole embodiments of above-mentioned charge control circuit, and the technical effect who reaches is also identical, no longer gives unnecessary details here. Wherein, the charging control device can be selected as a charger.
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. A charging control circuit is characterized by comprising a direct-current power supply input end, a direct-current power supply output end used for being connected with an electricity storage module, a controller, a driving switch circuit and a charging switch circuit;
the signal output end of the controller is connected with the input end of the driving switch circuit, and the output end of the driving switch circuit is connected with the controlled end of the charging switch circuit;
the input end of the charging switch circuit is connected with the input end of the direct-current power supply, and the output end of the charging switch circuit is connected with the output end of the direct-current power supply;
the driving switch circuit is used for outputting a turn-off signal to the charging switch circuit according to an abnormal signal when receiving the abnormal signal output by the controller;
the charging switch circuit is used for being cut off according to the turn-off signal so as to disconnect the electric connection between the input end of the direct current power supply and the output end of the direct current power supply, and the electricity storage module stops storing electricity.
2. The charge control circuit of claim 1, wherein the driving switch circuit comprises a first capacitor, a second capacitor, a first resistor, a second resistor, a first transistor, and a bidirectional conducting module;
the first end of the first capacitor is an input end of the driving switch circuit, the second end of the first capacitor is connected with the first end of the bidirectional conduction module, and the second end of the bidirectional conduction module is connected with the first end of the first resistor;
the second end of the first resistor is connected with the first end of the second capacitor, the first end of the second resistor and the first end of the first transistor; the third end of the bidirectional conduction module, the second end of the second capacitor, the second end of the second resistor and the third end of the first transistor are connected with a system ground; the second end of the first transistor is the output end of the driving switch circuit.
3. The charge control circuit of claim 2, wherein the bidirectional conduction module comprises a bidirectional switching diode, the first terminal of the bidirectional switching diode is the first terminal of the bidirectional conduction module, the second terminal of the bidirectional switching diode is the second terminal of the bidirectional conduction module, and the third terminal of the bidirectional switching diode is the third terminal of the bidirectional conduction module.
4. The charge control circuit of claim 2, wherein the bidirectional conduction module comprises a first diode and a second diode, a common terminal of the first diode and the second diode is a first terminal of the bidirectional conduction module, a cathode of the first diode is a second terminal of the bidirectional conduction module, and an anode of the second diode is a third terminal of the bidirectional conduction module.
5. The charge control circuit of claim 2, wherein the first transistor is an N-type isolation field effect transistor, a gate of the N-type isolation field effect transistor is a first terminal of the first transistor, a drain of the N-type isolation field effect transistor is a second terminal of the first transistor, and a source of the N-type isolation field effect transistor is a third terminal of the first transistor.
6. The charge control circuit of claim 1, wherein the charge switch circuit comprises a third resistor, a fourth resistor, a zener diode, and a second transistor;
a first end of the fourth resistor is a controlled end of the charging switch circuit, and a second end of the fourth resistor is connected with a first end of the second transistor, an anode of the voltage stabilizing diode and a first end of the third resistor;
the second end of the second transistor is the input end of the charging switch circuit and is connected with the cathode of the voltage stabilizing diode and the second end of the third resistor, and the third end of the second transistor is the output end of the charging switch circuit.
7. The charge control circuit according to claim 6, wherein the second transistor is a P-type isolation fet, a gate of the P-type isolation fet is a first terminal of the second transistor, a source of the P-type isolation fet is a second terminal of the second transistor, and a drain of the P-type isolation fet is a third terminal of the second transistor.
8. The charge control circuit according to any one of claims 1 to 7, wherein the charge control circuit further comprises a transformer and a rectifying-filtering circuit;
the input end of the rectification filter circuit is connected with one end of the secondary coil of the transformer, and the output end of the rectification filter circuit is the input end of the direct-current power supply.
9. The charge control circuit of claim 1, wherein the controller is a single-chip microcomputer.
10. A charge control device, characterized in that the charge control device comprises a charge control circuit according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020516588.7U CN211790898U (en) | 2020-04-09 | 2020-04-09 | Charging control circuit and charging control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020516588.7U CN211790898U (en) | 2020-04-09 | 2020-04-09 | Charging control circuit and charging control device |
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| CN211790898U true CN211790898U (en) | 2020-10-27 |
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