CN214506541U - Battery over-discharge protection circuit and power supply device - Google Patents
Battery over-discharge protection circuit and power supply device Download PDFInfo
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- CN214506541U CN214506541U CN202023088601.2U CN202023088601U CN214506541U CN 214506541 U CN214506541 U CN 214506541U CN 202023088601 U CN202023088601 U CN 202023088601U CN 214506541 U CN214506541 U CN 214506541U
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Abstract
The application discloses a battery over-discharge protection circuit and a power supply device, wherein a power supply circuit stops switching an input voltage output by an energy storage component to a battery output control circuit when a turn-off signal is input, the input voltage is switched to the battery output control circuit when the turn-off signal is stopped, the control circuit stops outputting the turn-off signal according to the input voltage, outputs the turn-off signal according to a received operation instruction when the turn-off signal is stopped, and stops outputting the turn-off signal according to the received operation instruction when the turn-off signal is output, so that the energy storage component can stop supplying power to the battery output control circuit by inputting the operation instruction to the control circuit when the battery output control circuit is not needed, the over-discharge of the energy storage component caused by the self-consumption of the battery output control circuit is avoided, the quality of the energy storage component is reduced, and in addition, the control circuit can continuously input two operation instructions, to restart the battery output control circuit.
Description
Technical Field
The application belongs to the technical field of battery protection, and particularly relates to a battery over-discharge protection circuit and a power supply device.
Background
The traditional battery can always supply power to the battery output control circuit, so that the battery output control circuit can consume power when the battery does not output power, the power consumption of the battery can be consumed when the battery output control circuit consumes the power of the battery, and the problem of battery quality reduction caused by the depletion of the electric quantity of the battery when the battery is idle for a long time can be solved.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a battery over-discharge protection circuit, and aims to solve the problem that the traditional battery output control circuit is used up due to self-consumption electricity.
A first aspect of the embodiments of the present application provides a battery overdischarge protection circuit, which is connected to a battery output control circuit, and includes:
the power supply circuit is configured to stop switching the input voltage output by the energy storage component to the battery output control circuit when a turn-off signal is input, and to switch the input voltage to the battery output control circuit when the turn-off signal is stopped being input; and
and the control circuit is connected with the power supply circuit and is configured to stop outputting the turn-off signal according to the input voltage, output the turn-off signal according to a received operation instruction when the turn-off signal is stopped to be output, and stop outputting the turn-off signal according to the received operation instruction when the turn-off signal is output.
In one embodiment, the battery over-discharge protection circuit further comprises an indication circuit;
the indication circuit is connected with the control circuit and configured to be lightened according to the turn-off signal.
In one embodiment, the control circuit includes a first resistor, a second resistor, a third resistor, a first field effect transistor, a second field effect transistor, a key switch and a first capacitor;
the first end of the first resistor, the first end of the second resistor, the drain electrode of the first field effect transistor and the grid electrode of the second field effect transistor are connected in common, the second end of the second resistor and the drain electrode of the second field effect transistor are connected and connected to the input voltage input end of the control circuit, the second end of the first resistor, the first end of the key switch and the first end of the first capacitor are connected, the second end of the key switch, the grid electrode of the first field effect transistor and the first end of the third resistor are connected in common, the second end of the third resistor and the source electrode of the second field effect transistor are connected and connected to the turn-off signal output end of the control circuit, the second end of the first capacitor and the source electrode of the first field effect transistor are connected with a power ground, and the key switch is used for receiving an operation instruction.
In one embodiment, the power supply circuit includes a fourth resistor, a fifth resistor, and a third fet;
the first end of the fourth resistor and the first end of the fifth resistor are connected and connected to a turn-off signal input end of the power supply circuit, the second end of the fifth resistor is connected with a grid electrode of the third field-effect tube, a source electrode of the third field-effect tube is connected to an input voltage input end of the power supply circuit, and a drain electrode of the third field-effect tube is connected to an input voltage output end of the power supply circuit.
In one embodiment, the indication circuit includes a second capacitor, a sixth resistor, and a light emitting diode;
the first end of the second capacitor is connected to the turn-off signal input end of the indicating circuit, the second end of the second capacitor is connected with the first end of the sixth resistor, the second end of the sixth resistor is connected with the anode of the light-emitting diode, and the cathode of the light-emitting diode is connected with a power ground.
In one embodiment, the battery output control circuit is further connected with the energy storage assembly and the power utilization load respectively;
the battery output control circuit is configured to be powered on to work when the input voltage is input, and controls the energy storage assembly and the electric load to be connected or disconnected.
A second aspect of embodiments of the present application is a power supply device including a battery output control circuit and the power supply device according to any one of the first aspect.
In one embodiment, the battery output control circuit comprises a main control assembly, a battery protection assembly and a switch assembly;
the switch assembly, the energy storage assembly and the power utilization load are connected in series, the switch assembly is configured to be a discharge loop of the input voltage according to a first conduction signal, and the discharge loop comprises the energy storage assembly, the power utilization load, the switch assembly and a power ground;
the battery protection assembly is connected with the switch assembly, is configured to be powered on to work when the input voltage is input, and outputs the first conducting signal according to a second conducting signal;
the main control assembly is connected with the battery protection assembly, is configured to be powered on to work when the input voltage is input, and outputs the second conduction signal.
Compared with the prior art, the embodiment of the utility model beneficial effect who exists is: the scheme stops switching the input voltage output by the energy storage component to the battery output control circuit through the power supply circuit when a turn-off signal is input, switches the input voltage to the battery output control circuit when the turn-off signal is stopped, stops outputting the turn-off signal according to the input voltage by the control circuit, outputs the turn-off signal according to the received operation instruction when the turn-off signal is stopped, and stops outputting the turn-off signal according to the received operation instruction when the turn-off signal is output, so that the energy storage component stops supplying power to the battery output control circuit by inputting the operation instruction to the control circuit when the battery output control circuit is not needed, the over-discharge of the energy storage component caused by the self-consumption of the battery output control circuit is avoided, the quality of the energy storage component is reduced, and in addition, when the energy storage component supplies power to the battery output control circuit, the battery output control circuit can be restarted by continuously inputting two operation instructions to the control circuit so that the energy storage assembly can be used for recovering power supply to the battery output control circuit after the power supply to the battery output control circuit is cut off.
Drawings
Fig. 1 is a first exemplary schematic block diagram of a battery overdischarge protection circuit provided in an embodiment of the present application;
fig. 2 is a second exemplary schematic block diagram of a battery overdischarge protection circuit according to an embodiment of the present disclosure;
fig. 3 is an exemplary schematic circuit diagram of a battery over-discharge protection circuit provided in an embodiment of the present application;
fig. 4 is an exemplary schematic block diagram of a power supply apparatus according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in 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 present application and are not intended to limit the present application.
Fig. 1 shows a first exemplary schematic block diagram of a battery overdischarge protection circuit provided in an embodiment of the present application, and for convenience of description, only the parts related to the embodiment are shown, and detailed descriptions are as follows:
the battery over-discharge protection circuit is connected with the battery output control circuit 300, and comprises a power supply circuit 120 and a control circuit 110.
The power supply circuit 120 is configured to stop the input voltage output by the energy storage device 200 from being transferred to the battery output control circuit 300 when the shutdown signal is input, and to transfer the input voltage to the battery output control circuit 300 when the shutdown signal is input.
And a control circuit 110 connected to the power supply circuit 120, and configured to stop outputting the shutdown signal according to the input voltage, output the shutdown signal according to the received operation instruction when the shutdown signal is stopped being output, and stop outputting the shutdown signal according to the received operation instruction when the shutdown signal is output.
In this embodiment, when the power supply circuit 120 switches the input voltage output by the energy storage device 200 to the battery output control circuit 300 when the power supply circuit 120 stops inputting the shutdown signal, the operation command is input to the control circuit 110, the control circuit 110 outputs the shutdown signal to the power supply circuit 120 according to the operation command, the power supply circuit 120 stops switching the input voltage output by the energy storage device 200 to the battery output control circuit 300, so that the energy storage device 200 stops supplying power to the battery output control circuit 300, and the battery output control circuit 300 stops consuming power, when the control circuit 110 outputs the shutdown signal, the operation command is input, the control circuit 110 stops outputting the shutdown signal to the power supply circuit 120 according to the operation command, and the power supply circuit 120 switches the input voltage output by the energy storage device 200 to the battery output control circuit 300, so that the energy storage device 200 stops outputting power to the battery by inputting the operation command to the control circuit 110 when the battery output control circuit 300 is not needed The control circuit 300 supplies power to prevent the over-discharge of the energy storage assembly 200 caused by the self-consumption of the battery output control circuit 300, thereby causing the quality of the energy storage assembly 200 to be reduced, and in addition, when the energy storage assembly 200 supplies power to the battery output control circuit 300, the energy storage assembly 200 can also restore the power supply to the battery output control circuit 300 after cutting off the power supply to the battery output control circuit 300 by continuously inputting two operation instructions to the control circuit 110, so that the battery output control circuit 300 is restarted.
In the case where the battery output control circuit 300 is built in a power supply device or is not detachable (for example, a non-detachable power supply device in an electric vehicle), the battery over-discharge protection circuit of this embodiment can effectively cut off the power supply of the energy storage assembly 200 in the power supply device to the battery output control circuit 300, and can cut off the power supply of the energy storage assembly 200 to the battery output control circuit 300 when the battery output control circuit 300 needs to be overhauled, thereby avoiding danger caused by detected live operation.
The operation command may be a key operation command, and the energy storage device 200 may be a battery device.
Referring to fig. 2, in an embodiment, the battery over-discharge protection circuit further includes an indication circuit 130.
The indication circuit 130 is connected to the control circuit 110 and configured to light up according to the shutdown signal.
In this embodiment, the indication circuit 130 is turned on according to the shutdown signal output by the control circuit 110 to indicate that the user is reminded to turn off the power supply of the energy storage assembly 200 to the power supply device.
Referring to fig. 3, in an embodiment, the control circuit 110 includes a first resistor R1, a second resistor R2, a third resistor R3, a first fet Q1, a second fet Q2, a key switch S1, and a first capacitor C1.
A first end of the first resistor R1, a first end of the second resistor R2, a drain of the first fet Q1, and a gate of the second fet Q2 are connected in common, a second end of the second resistor R2 and a drain of the second fet Q2 are connected to an input voltage input terminal of the control circuit 110, a second end of the first resistor R1, a first end of the key switch S1, and a first end of the first capacitor C1 are connected, a second end of the key switch S1, a gate of the first fet Q1, and a first end of the third resistor R3 are connected in common, a second end of the third resistor R3 and a source of the second fet Q2 are connected to an off signal output terminal of the control circuit 110, a second end of the first capacitor C1 and a source of the first fet Q1 are both connected to a power ground, wherein the key switch S1 is configured to receive an operation command.
Referring to fig. 3, in an embodiment, the power supply circuit 120 includes a fourth resistor R4, a fifth resistor R5, and a third fet Q3.
A first end of the fourth resistor R4 and a first end of the fifth resistor R5 are connected to a turn-off signal input terminal of the power supply circuit 120, a second end of the fifth resistor R5 is connected to a gate of the third fet Q3, a source of the third fet Q3 is connected to an input voltage input terminal of the power supply circuit 120, and a drain of the third fet Q3 is connected to an input voltage output terminal of the power supply circuit 120.
Referring to fig. 3, in an embodiment, the indication circuit 130 includes a second capacitor C2, a sixth resistor R6, and a light emitting diode D1.
A first end of the second capacitor C2 is connected to the off signal input end of the indication circuit 130, a second end of the second capacitor C2 is connected to a first end of the sixth resistor R6, a second end of the sixth resistor R6 is connected to the anode of the led D1, and the cathode of the led D1 is connected to the ground.
To explain the battery over-discharge protection circuit shown in fig. 3 with reference to the operation principle, the energy storage device 200 charges the first capacitor C1 through the first resistor R1 and the second resistor R2 to enable the first capacitor C1 to output a high level to the gate of the second fet Q2 to enable the second fet Q2 to be turned off, the gate of the first fet Q1 is connected to the ground through the third resistor R3 and the fifth resistor R5, the gate of the first fet Q1 is at a low level, so that the first fet Q1 is turned off, the gate of the third fet Q3 is connected to the ground through the fifth resistor R5 and the sixth resistor R6, the gate of the third fet Q3 is at a low level, so that the third fet Q3 is turned on, the energy storage device 200 outputs an input voltage to the battery output control circuit 300 through the third fet Q3 to power the battery output control circuit 300, when the push switch S1 is pushed, the first capacitor C1 is discharged through the key switch S1 and outputs a high level to the gate of the first fet Q1 to turn on the first fet Q1, the first fet Q1 is turned on to connect the gate of the second fet Q2 to ground through the first fet Q1, the gate of the second fet Q2 is low and the second fet Q2 is turned on, the input voltage output from the energy storage device 200 outputs a high level (off signal) to the gate of the third fet Q3 through the second fet Q2 to turn off the third fet Q3, while the off signal is applied to the gate of the first fet Q1 through the third resistor R3 to keep the first fet Q1 on, the first fet Q1 is kept on to keep the second fet Q2 outputting the off signal to the third fet Q3, thereby keeping the third fet Q3 off and stopping the transfer of the input voltage to the battery output control circuit 300, so that the energy storage module 200 stops supplying power to the battery output control circuit 300, and the turn-off signal charges the second capacitor C2, when the second capacitor C2 is in a charging state, the light emitting diode D1 is turned on and lit to prompt the user that the energy storage module 200 has entered a state of stopping supplying power to the battery output control circuit 300, at this time, if the key switch S1 is pressed again, the discharged first capacitor C1 outputs a low level to the gate of the first fet Q1 through the key switch S1 to turn off the first fet Q1, the first fet Q1 is turned off to stop outputting a low level to the second fet Q2 to turn off the second fet Q2, so that the second fet Q2 stops outputting a high level (turn-off signal) to the gate of the third fet Q3 according to the input voltage to turn on the third fet Q3 and output the input voltage output by the energy storage module 200 to the battery output control circuit 300, when the two-key switch S1 is pressed, the battery output control circuit 300 is powered off and then powered on again, which is equivalent to restarting the battery output control circuit 300.
The present embodiment further provides a power supply device, which includes the battery output control circuit 300 and the over-discharge protection circuit according to any of the above embodiments, because the power supply device of the present embodiment includes the over-discharge protection circuit according to any of the above embodiments, the power supply device of the present embodiment at least has the corresponding beneficial effects of the over-discharge protection circuit according to any of the above embodiments.
Referring to fig. 4, in an embodiment, the battery output control circuit 300 includes a main control component 310, a battery protection component 320 and a switch component 330.
The switching element 330, the energy storage element 200 and the electric load 400 are connected in series, the switching element 330 is configured to conduct a discharging loop of the input voltage according to the first conducting signal, and the discharging loop includes the energy storage element 200, the electric load 400, the switching element 330 and a power ground.
The battery protection component 320 is connected to the switch component 330, and configured to be powered on when an input voltage is input, and output a first conducting signal according to a second conducting signal.
The main control component 310 is connected to the battery protection component 320, and configured to power up when an input voltage is input, and output a second turn-on signal.
In this embodiment, when the control circuit 110 stops outputting the turn-off signal to the power supply circuit 120, the power supply circuit 120 switches the input voltage output by the energy storage device 200 to the main control device 310 and the battery protection device 320, so that the main control device 310 and the battery protection device 320 are powered on and operate, when the main control device 310 and the battery protection device 320 are powered on and operate, the main control device 310 outputs a second turn-on signal to the battery protection device 320, the battery protection device 320 outputs a first turn-on signal to the switch device 330 according to the second turn-on signal, so that the switch device 330 is turned on, when the switch device 330 is turned on, the discharge circuit where the energy storage device 200 and the electrical load 400 are located is turned on, and the input voltage output by the energy storage device 200 is output to the electrical load 400 to be powered on by the electrical load 400; when the control circuit 110 outputs the turn-off signal to the power supply circuit 120, the power supply circuit 120 stops outputting the input voltage to the main control component 310 and the battery protection component 320, so that the main control component 310 and the battery protection component 320 lose power and stop working, the main control component 310 stops outputting the second turn-on signal to the battery protection component 320, so that the battery protection component 320 stops outputting the first turn-on signal to the switch component 330, and the switch component 330 is turned off to disconnect the loop of the energy storage component 200 and the electric load 400, so that the input voltage stops being output to the electric load 400.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should 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; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (8)
1. A battery over-discharge protection circuit is connected with a battery output control circuit, and is characterized by comprising:
the power supply circuit is configured to stop switching the input voltage output by the energy storage component to the battery output control circuit when a turn-off signal is input, and to switch the input voltage to the battery output control circuit when the turn-off signal is stopped being input; and
and the control circuit is connected with the power supply circuit and is configured to stop outputting the turn-off signal according to the input voltage, output the turn-off signal according to a received operation instruction when the turn-off signal is stopped to be output, and stop outputting the turn-off signal according to the received operation instruction when the turn-off signal is output.
2. The battery over-discharge protection circuit of claim 1, wherein the battery over-discharge protection circuit further comprises an indication circuit;
the indication circuit is connected with the control circuit and configured to be lightened according to the turn-off signal.
3. The battery over-discharge protection circuit of claim 1, wherein the control circuit comprises a first resistor, a second resistor, a third resistor, a first field effect transistor, a second field effect transistor, a key switch, and a first capacitor;
the first end of the first resistor, the first end of the second resistor, the drain electrode of the first field effect transistor and the grid electrode of the second field effect transistor are connected in common, the second end of the second resistor and the drain electrode of the second field effect transistor are connected and connected to the input voltage input end of the control circuit, the second end of the first resistor, the first end of the key switch and the first end of the first capacitor are connected, the second end of the key switch, the grid electrode of the first field effect transistor and the first end of the third resistor are connected in common, the second end of the third resistor and the source electrode of the second field effect transistor are connected and connected to the turn-off signal output end of the control circuit, the second end of the first capacitor and the source electrode of the first field effect transistor are connected with a power ground, and the key switch is used for receiving an operation instruction.
4. The battery over-discharge protection circuit of claim 1, wherein the power supply circuit comprises a fourth resistor, a fifth resistor, and a third field effect transistor;
the first end of the fourth resistor and the first end of the fifth resistor are connected and connected to a turn-off signal input end of the power supply circuit, the second end of the fifth resistor is connected with a grid electrode of the third field-effect tube, a source electrode of the third field-effect tube is connected to an input voltage input end of the power supply circuit, and a drain electrode of the third field-effect tube is connected to an input voltage output end of the power supply circuit.
5. The battery over-discharge protection circuit of claim 2, wherein the indication circuit comprises a second capacitor, a sixth resistor, and a light emitting diode;
the first end of the second capacitor is connected to the turn-off signal input end of the indicating circuit, the second end of the second capacitor is connected with the first end of the sixth resistor, the second end of the sixth resistor is connected with the anode of the light-emitting diode, and the cathode of the light-emitting diode is connected with a power ground.
6. The battery over-discharge protection circuit of claim 1, wherein the battery output control circuit is further connected to the energy storage assembly and an electrical load, respectively;
the battery output control circuit is configured to be powered on to work when the input voltage is input, and controls the energy storage assembly and the electric load to be connected or disconnected.
7. A power supply device characterized by comprising a battery output control circuit and the battery overdischarge protection circuit according to any one of claims 1 to 6.
8. The power supply device according to claim 7, wherein the battery output control circuit includes a main control component, a battery protection component, and a switch component;
the switch assembly, the energy storage assembly and the power utilization load are connected in series, the switch assembly is configured to be a discharge loop of the input voltage according to a first conduction signal, and the discharge loop comprises the energy storage assembly, the power utilization load, the switch assembly and a power ground;
the battery protection assembly is connected with the switch assembly, is configured to be powered on to work when the input voltage is input, and outputs the first conducting signal according to a second conducting signal;
the main control assembly is connected with the battery protection assembly, is configured to be powered on to work when the input voltage is input, and outputs the second conduction signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023088601.2U CN214506541U (en) | 2020-12-18 | 2020-12-18 | Battery over-discharge protection circuit and power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023088601.2U CN214506541U (en) | 2020-12-18 | 2020-12-18 | Battery over-discharge protection circuit and power supply device |
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| Publication Number | Publication Date |
|---|---|
| CN214506541U true CN214506541U (en) | 2021-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023088601.2U Active CN214506541U (en) | 2020-12-18 | 2020-12-18 | Battery over-discharge protection circuit and power supply device |
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| Country | Link |
|---|---|
| CN (1) | CN214506541U (en) |
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- 2020-12-18 CN CN202023088601.2U patent/CN214506541U/en active Active
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Effective date of registration: 20230118 Address after: 523000 Room 301, building 1, No. 9, industrial West Third Road, Songshanhu Park, Dongguan City, Guangdong Province Patentee after: Dongguan chuangzhimei Technology Co.,Ltd. Address before: No.9, Gongye Xisan Road, Songshanhu hi tech Industrial Development Zone, Dongguan City, Guangdong Province 523000 Patentee before: DONGGUAN CHUANGMING BATTERY TECHNOLOGY Co.,Ltd. |
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