CN221240160U - Battery pack plug-in protection circuit and electronic equipment - Google Patents
Battery pack plug-in protection circuit and electronic equipment Download PDFInfo
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- CN221240160U CN221240160U CN202323077428.XU CN202323077428U CN221240160U CN 221240160 U CN221240160 U CN 221240160U CN 202323077428 U CN202323077428 U CN 202323077428U CN 221240160 U CN221240160 U CN 221240160U
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- switching tube
- lithium battery
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- 229910052744 lithium Inorganic materials 0.000 claims abstract description 77
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000004146 energy storage Methods 0.000 claims abstract description 41
- 239000003990 capacitor Substances 0.000 claims description 64
- 238000010891 electric arc Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 3
- 230000005669 field effect Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model relates to the field of battery charging, in particular to a battery pack plug-in protection circuit and electronic equipment. The battery pack plug-in protection circuit comprises a switch module, an energy storage module and a controller. The switch module is arranged in a charging loop of the lithium battery to the controller, one end of the switch module is connected with the lithium battery, and the other end of the switch module is connected with the energy storage module; the controller is used for generating a first control signal when the lithium battery is accessed and transmitting the first control signal to the switch module; the switch module is used for conducting a loop between the lithium battery and the energy storage module to store energy when receiving the first control signal. Through the energy storage function of the energy storage module, equipment damage caused by electric arc generated by excessive instantaneous current when a battery is inserted is avoided, so that the safety performance during charging is improved.
Description
Technical Field
The present utility model relates to the field of battery charging, and in particular, to a battery pack plug protection circuit and an electronic device.
Background
A brushless lithium battery electric tool is an electric tool using a brushless motor and a lithium battery as power sources. The electric screwdriver, the electric drill, the electric hammer and the like are widely applied to the fields of families, industry, buildings and the like. At present, brushless lithium battery electric tools are gradually popularized, the use frequency is also higher, and the requirements on the quality of a motor controller are stricter.
When the lithium electric tool is used, the charging and discharging of the system can be controlled by pulling and inserting the battery, an arc can be generated by striking sparks in the pulling and inserting process, damage to equipment can be caused, and fire disasters can be caused when the equipment is more serious.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present utility model and is not intended to represent an admission that the foregoing is prior art.
Disclosure of utility model
The utility model mainly aims to provide a battery pack plug-in protection circuit and electronic equipment, and aims to solve the technical problem that equipment is damaged and fire is caused by plug-in battery packs when lithium electric tools are used in the prior art.
In order to achieve the above object, the present utility model provides a battery pack plug-in protection circuit, which is applied to charging a lithium battery, comprising: the device comprises a switch module, an energy storage module and a controller;
The switch module is arranged in a charging loop of the lithium battery to the controller, one end of the switch module is connected with the lithium battery, and the other end of the switch module is connected with the energy storage module;
The controller is used for generating a first control signal when the lithium battery is accessed and transmitting the first control signal to the switch module;
And the switch module is used for conducting a loop between the lithium battery and the energy storage module to store energy when the first control signal is received.
Optionally, the switch module includes: first to fourth resistors, a first switching tube and a second switching tube;
One end of the first resistor is connected with the controller, the other end of the first resistor is simultaneously connected with one end of the second resistor and the control end of the first switching tube, the other end of the second resistor is grounded, the input end of the first switching tube is connected with one end of the third resistor, the output end of the first switching tube is grounded, the other end of the third resistor is simultaneously connected with the control end of the second switching tube and one end of the fourth resistor, the other end of the fourth resistor is connected with the lithium battery and the input end of the second switching tube, and the output end of the second switching tube is connected with the energy storage module.
Optionally, the switch module further comprises: a bleed unit;
The first end of the discharge unit is connected with the energy storage module, the second end of the discharge unit is connected with the controller, and the third end of the discharge unit is grounded;
The controller is further used for generating a second control signal when the lithium battery is not connected to the controller, and transmitting the second control signal to the discharge unit;
and the discharge unit is used for controlling the energy storage module to discharge energy when receiving the second control signal.
Optionally, the bleed unit comprises: a third switching tube and fifth to eighth resistors;
One end of a fifth resistor is connected with the controller, the other end of the fifth resistor is simultaneously connected with one end of a sixth resistor and the control end of the third switch tube, the other end of the sixth resistor is grounded, the input end of the third switch tube is simultaneously connected with one end of a seventh resistor, the output end of the third switch tube is grounded, the other end of the seventh resistor is simultaneously connected with the positive electrode of the first capacitor and the positive electrode of the second capacitor, and the eighth resistor is connected with the seventh resistor in parallel.
Optionally, the battery pack plug protection circuit further includes: a charge control module;
the charging control module is arranged between the lithium battery and a charging loop of the controller;
And the charging control module is used for controlling the lithium battery to be connected into the charging loop when the lithium battery is conducted.
Optionally, the charging control module includes: a switch button, a third capacitor, ninth to eleventh resistors and a fourth switching tube;
One end of the switch button is connected with the first end of the third capacitor, the other end of the switch button is grounded, the third capacitor is connected with the ninth resistor in parallel, the second end of the third capacitor is connected with one end of the tenth resistor, the other end of the tenth resistor is simultaneously connected with the control end of the fourth switching tube and one end of the eleventh resistor, the other end of the eleventh resistor is simultaneously connected with the input end of the fourth switching tube and the lithium battery, and the output end of the fourth switching tube is connected with the controller.
Optionally, the charging control module further includes: a twelfth resistor, a thirteenth resistor and a fifth switching tube;
The input end of the fifth switching tube is connected with the second end of the third capacitor, the output end of the fifth switching tube is grounded, the control end of the fifth switching tube is simultaneously connected with one end of the twelfth resistor and one end of the thirteenth resistor, the other end of the twelfth resistor is grounded, and the other end of the thirteenth resistor is connected with the controller.
Optionally, the switch button is a double pole double throw switch, and the charging control module further includes: a fourteenth resistor, a fifteenth resistor, and a fourth capacitor;
The first end of the double-pole double-throw switch is connected with the first end of the third capacitor, the second end of the double-pole double-throw switch is grounded, the third end of the double-pole double-throw switch is simultaneously connected with the fourteenth resistor and one end of the fifteenth resistor, the fourth end of the double-pole double-throw switch is grounded, the other end of the fourteenth resistor is connected with a power supply, the other end of the fifteenth resistor is simultaneously connected with one end of the fourth capacitor and the controller, and the other end of the fourth capacitor is grounded.
Optionally, the charging control module further includes: first to fourth diodes;
The anode of the first diode is connected with the first end of the third capacitor, the cathode of the first diode is connected with the first end of the double-pole double-throw switch, the anode of the second diode is simultaneously connected with the fourteenth resistor and the fifteenth resistor, the cathode of the second diode is connected with the third end of the double-pole double-throw switch, the anode of the third diode is connected with the output end of the fourth switch tube, and the cathode of the third diode is connected with the controller; and the anode of the fourth diode is connected with the controller, and the cathode of the fourth diode is connected with the thirteenth resistor.
In addition, to achieve the above object, the present utility model also provides an electronic device including: the battery pack plug-in protection circuit.
According to the technical scheme, the battery pack plug-in protection circuit and the electronic equipment are provided. The battery pack plug-in protection circuit comprises a switch module, an energy storage module and a controller. The switch module is arranged in a charging loop of the lithium battery to the controller, one end of the switch module is connected with the lithium battery, and the other end of the switch module is connected with the energy storage module; the controller is used for generating a first control signal when the lithium battery is accessed and transmitting the first control signal to the switch module; and the switch module is used for conducting a loop between the lithium battery and the energy storage module to store energy when the first control signal is received. Through the energy storage function of the energy storage module, equipment damage caused by electric arc generated by excessive instantaneous current when a battery is inserted is avoided, so that the safety performance during charging is improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a functional block diagram of a first embodiment of a battery pack plug protection circuit according to the present utility model;
FIG. 2 is a circuit diagram of a second embodiment of a battery pack plug protection circuit according to the present utility model;
FIG. 3 is a circuit diagram of a third embodiment of a battery pack plug protection circuit according to the present utility model;
FIG. 4 is a functional block diagram of an electronic device according to the present utility model;
fig. 5 is a circuit configuration diagram of an electronic device according to the present utility model.
Reference numerals illustrate:
| Reference numerals | Name of the name | Reference numerals | Name of the name |
| R1～R15 | First to fifteenth resistors | VCC | Power supply |
| C1～C3 | First to third capacitors | 10 | Switch module |
| Q1～Q5 | First to fifth switching tubes | 20 | Controller for controlling a power supply |
| D1～D4 | First to fourth diodes | 30 | Energy storage module |
| SW | Double pole double throw switch | 40 | Charging control module |
| CTRL1 | First control signal | 101 | Drain unit |
| CTRL2 | Second control signal |
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the technical solutions should be considered that the combination does not exist and is not within the scope of protection claimed by the present utility model.
Referring to fig. 1, fig. 1 is a functional block diagram of a first embodiment of a battery pack plug-in protection circuit according to the present utility model. The utility model provides a first embodiment of a battery pack plug-in protection circuit.
In this embodiment, the battery pack plug protection circuit is applied to charging a lithium battery, and includes: a switch module 10, a controller 20 and an energy storage module 30. The switch module 10 is disposed in a charging circuit of the lithium battery to the controller 20, one end of the switch module 10 is connected with the lithium battery, and the other end is connected with the energy storage module 30.
It should be noted that, when the lithium battery is connected, the controller 20 may generate a first control signal and transmit the first control signal to the switch module 10. The switch module 10 may conduct a circuit between the lithium battery and the energy storage module 30 for energy storage when receiving the first control signal.
The lithium battery can be a rechargeable battery which takes lithium metal or lithium alloy as a positive electrode material and adopts the intercalation and deintercalation of lithium ions to realize the discharging process.
Further, the controller 20 may be an electronic device having a central processing unit (Central Processing Unit, CPU) and a memory. Various intelligent operations can be realized through programming, and the intelligent operation system has the functions of data processing and storage. The controller 20 may be a micro control unit (Microcontroller Unit, MCU) or a single chip microcomputer.
Further, the energy storage module 30 may include: the switching module comprises a first capacitor C1 and a second capacitor C2, wherein the positive electrode of the first capacitor C1 is connected with the switching module 10, the negative electrode of the first capacitor is grounded, and the second capacitor C2 is connected with the first capacitor in parallel. The switching module 10 may conduct a loop between the lithium battery and the first and second capacitors C1 and C2 when receiving the first control signal, thereby performing energy storage.
It should be understood that the first control signal may be a high-low level signal generated by the controller 20 according to the lithium battery access condition, the first control signal generated by the controller 20 is a high-level signal when the lithium battery is accessed, and the first control signal generated by the controller 20 is a low-level signal when the lithium battery is pulled out.
The switch module 10 turns on the circuit between the lithium battery and the first capacitor C1 and the second capacitor C2 when receiving the first control signal of the high level, and turns off the circuit between the lithium battery and the first capacitor C1 and the second capacitor C2 when receiving the first control signal of the low level.
Further, the first capacitor C1 and the second capacitor C2 may be electrolytic capacitors, which store charges using an electrolyte as a medium. Typically consisting of two metal electrodes (positive and negative) and a dielectric electrolyte. When the electrolytic capacitor is connected to a power source, the positive electrode attracts negative charges and the negative electrode attracts positive charges, forming an electric field. Ions in the electrolyte can move under the action of an electric field, positive ions move to the negative electrode, and negative ions move to the positive electrode, so that the charge storage function is realized.
Further, the switch module 10 may be a controllable switch device, and may be a combination of a transistor, a field effect transistor, or a switch device, which receives the first control signal to control on or off of the loop.
The embodiment provides a battery pack plug-in protection circuit and electronic equipment. The battery pack plug-in protection circuit comprises a switch module 10, a controller 20 and an energy storage module 30. The switch module 10 is disposed in a charging circuit of the lithium battery to the controller 20, one end of the switch module 10 is connected with the lithium battery, and the other end is connected with the energy storage module 30; the controller 20 is configured to generate a first control signal when the lithium battery is connected, and transmit the first control signal to the switch module 10; the switch module 10 is configured to, when receiving the first control signal, switch on a circuit between the lithium battery and the energy storage module 30 for energy storage. Through the energy storage charging function of the electrolytic capacitor, equipment damage caused by electric arc generated by excessive instantaneous current when a battery is inserted is avoided, so that the safety performance during charging is improved.
Referring to fig. 2, fig. 2 is a circuit configuration diagram of a second embodiment of the battery pack plug protection circuit according to the present utility model. The second embodiment of the battery pack plug protection circuit of the present utility model is presented based on the first embodiment of the battery pack plug protection circuit described above.
In this embodiment, the switch module 10 includes: first to fourth resistors, a first switching tube Q1 and a second switching tube Q2.
One end of the first resistor R1 is connected to the controller 20, the other end of the first resistor R1 is connected to one end of the second resistor R2 and the control end of the first switch tube Q1, the other end of the second resistor R2 is grounded, the input end of the first switch tube Q1 is connected to one end of the third resistor R3, the output end of the first switch tube Q1 is grounded, the other end of the third resistor R3 is connected to the control end of the second switch tube Q2 and one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected to the lithium battery and the input end of the second switch tube Q2, and the output end of the second switch tube Q2 is connected to the energy storage module 30.
Further, the output end of the second switching tube Q2 is connected to the positive electrodes of the first capacitor C1 and the second capacitor C2 at the same time.
It should be noted that, the first switching transistor Q1 may be a transistor, and when the base receives a high level signal, the loop of the collector and the emitter is turned on. The second switching tube Q2 may be a field effect tube, and when the potential difference between the gate and the source exceeds the conduction threshold, the source and the drain of the second switching tube Q2 are turned on.
It should be understood that when the lithium battery is connected to the charging loop of the controller 20, the controller generates a first control signal with a high level, the first control signal is transmitted to the control end of the first switch tube Q1, the first switch tube Q1 is turned on, the potential difference between the gate and the source of the second switch tube Q2 exceeds a conduction threshold, the second switch tube Q2 is turned on, and the first capacitor C1 and the second capacitor C2 store energy for the charge of the lithium battery, so as to avoid excessive instantaneous current when the lithium battery is connected.
Further, the switch module 10 further includes: a bleed unit 101. A first end of the relief unit 101 is connected to the energy storage module 30, a second end of the relief unit 101 is connected to the controller 20, and a third end of the relief unit 101 is grounded;
It should be noted that, when the lithium battery is not connected to the controller, the controller 20 may generate a second control signal and transmit the second control signal to the relief unit 101; the bleed unit 101 may control the energy storage module to bleed energy when the second control signal is received.
It should be understood that the second control signal may be a high-low level signal generated by the controller 20 according to the lithium battery access condition, the second control signal generated by the controller 20 is a low level signal when the lithium battery is accessed, and the second control signal generated by the controller 20 is a high level signal when the lithium battery is pulled out.
Further, the relief unit 101 includes: the third switching transistor Q3 and fifth to eighth resistors.
One end of the fifth resistor R5 is connected to the controller 20, the other end of the fifth resistor R5 is simultaneously connected to one end of the sixth resistor R6 and the control end of the third switch tube Q3, the other end of the sixth resistor R6 is grounded, the input end of the third switch tube Q3 is simultaneously connected to one end of the seventh resistor R7, the output end of the third switch tube Q3 is grounded, the other end of the seventh resistor R7 is connected to the energy storage module 30, and the eighth resistor R8 is connected in parallel with the seventh resistor R7.
Further, the other end of the seventh resistor R7 is connected to the positive electrode of the first capacitor C1 and the positive electrode of the second capacitor C2 at the same time.
Further, the third switching tube Q3 may be a transistor, and when the base receives a high level signal, the loop of the collector and the emitter is turned on.
It should be understood that when the charging circuit of the lithium battery is disconnected, the controller 20 generates a high-level second control signal, the second control signal is transmitted to the control end of the third switch Q3, the third switch Q3 is turned on, and the first capacitor C1 and the second capacitor C2 bleed the charge to the ground, so as to avoid that the electrolytic capacitor discharges too slowly and the pins contact other components, thereby causing the circuit to fail.
In this embodiment, the controller 20 generates the first control signal and the second control signal according to the access condition of the lithium battery, so as to control the conduction conditions of the first switching tube Q1, the second switching tube Q2 and the third switching tube Q3, and further control the energy storage and release functions of the energy storage module 30. When the lithium battery is connected into the charging loop, the first capacitor C1 and the second capacitor C2 store energy for the charge of the lithium battery, so that the instant current is prevented from being too large when the lithium battery is connected. After the lithium battery is disconnected, charges stored in the first capacitor C1 and the second capacitor C2 are discharged to the ground, so that the circuit failure caused by the fact that the electrolytic capacitor discharges too slowly and pins contact other components is avoided.
Referring to fig. 3, fig. 3 is a circuit configuration diagram of a third embodiment of a battery pack plug-in protection circuit according to the present utility model. The third embodiment of the battery pack plug protection circuit of the present utility model is presented based on the above embodiment of the battery pack plug protection circuit.
In this embodiment, the battery pack plug protection circuit further includes: a charge control module 40; the charge control module 40 is disposed between the lithium battery and a charging circuit of the controller 20; the charging control module 40 is configured to control the lithium battery to be connected to the charging circuit when the lithium battery is turned on.
It should be noted that, the charging control module 40 may be a controllable switching device, which can control on or off of the charging circuit, and may be a combination of a transistor, a field effect transistor, or a switching device.
Further, the charge control module 40 includes: a switch button SW, a third capacitor C3, ninth to eleventh resistors, and a fourth switching transistor Q4.
One end of the switch button SW is connected to the first end of the third capacitor C3, the other end of the switch button SW is grounded, the third capacitor C3 is connected in parallel with the ninth resistor R9, the second end of the third capacitor C3 is connected to one end of the tenth resistor R10, the other end of the tenth resistor R10 is simultaneously connected to the control end of the fourth switching tube Q4 and one end of the eleventh resistor R11, the other end of the eleventh resistor R11 is simultaneously connected to the input end of the fourth switching tube Q4 and the lithium battery, and the output end of the fourth switching tube Q4 is connected to the controller 20.
It should be appreciated that when the switch button SW is pressed to be closed, the third capacitor C3 is charged, so that the fourth switch Q4 is turned on, and thus the lithium battery is turned on with the charging circuit of the controller 20.
Further, the charging control module 40 further includes: a twelfth resistor R12, a thirteenth resistor R13, and a fifth switching transistor Q5;
The input end of the fifth switching tube Q5 is connected to the second end of the third capacitor C3, the output end of the fifth switching tube Q5 is grounded, the control end of the fifth switching tube Q5 is simultaneously connected to one end of the twelfth resistor R12 and one end of the thirteenth resistor R13, the other end of the twelfth resistor R12 is grounded, and the other end of the thirteenth resistor R13 is connected to the controller 20.
It should be understood that when the lithium battery is conducted to the charging circuit of the controller 20, the controller 20 may generate a high-level power supply signal to the fifth switching tube Q5, and the fifth switching tube Q5 is conducted, so that the lithium battery stably supplies power to the system of the controller 20.
Further, the switch button SW is a double pole double throw switch, and the charging control module 40 further includes: a fourteenth resistor R14, a fifteenth resistor R15 and a fourth capacitor C4.
The first end of the double-pole double-throw switch SW is connected with the first end of the third capacitor C3, the second end of the double-pole double-throw switch SW is grounded, the third end of the double-pole double-throw switch SW is simultaneously connected with the fourteenth resistor R14 and one end of the fifteenth resistor R15, the fourth end of the double-pole double-throw switch SW is grounded, the other end of the fourteenth resistor R14 is connected with the power supply VCC, the other end of the fifteenth resistor R15 is simultaneously connected with one end of the fourth capacitor C4 and the controller 20, and the other end of the fourth capacitor C4 is grounded.
It should be appreciated that when the double pole double throw switch SW is pressed to close, the lithium battery is in communication with the charging circuit of the controller 20, and the signal received by the controller 20 is low. When the double pole double throw switch SW is turned off, the signal received by the controller 20 is at a high level. The controller 20 can judge the state of the double pole double throw switch SW by the high and low level information.
Further, the charging control module 40 further includes: first to fourth diodes.
The anode of the first diode D1 is connected to the first end of the third capacitor C3, the cathode of the first diode D1 is connected to the first end of the double-pole double-throw switch SW, the anode of the second diode D2 is connected to the fourteenth resistor R14 and the fifteenth resistor R15 at the same time, the cathode of the second diode D2 is connected to the third end of the double-pole double-throw switch SW, the anode of the third diode D3 is connected to the output end of the fourth switch Q4, and the cathode is connected to the controller 20; the fourth diode D4 has an anode connected to the controller 20 and a cathode connected to the thirteenth resistor R13.
It should be understood that the first to fourth diodes are turned on when the forward voltage is greater than the PN junction threshold voltage, and turned off when the forward voltage is less than the PN junction threshold voltage, so as to achieve the effect of unidirectional current conduction in the loop.
In this embodiment, the charging control module 40 is disposed between the lithium battery and the charging circuit of the controller 20, and the lithium battery is controlled to be connected to the charging circuit by the double pole double throw switch SW, and the controller 20 controls the charging circuit to continuously and stably charge. The damage caused by arc generation due to overlarge current at the moment of the access of the lithium battery is avoided, so that the safety performance during charging is improved.
In addition, the embodiment of the utility model also provides electronic equipment which comprises the battery pack plug-in protection circuit. Referring to fig. 4 and 5, fig. 4 is a functional block diagram of an electronic device according to the present utility model; fig. 5 is a circuit configuration diagram of an electronic device according to the present utility model.
The electronic device adopts all the technical solutions of all the embodiments, so that the electronic device has at least all the beneficial effects brought by the technical solutions of the embodiments, and the description is omitted herein.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (10)
1. The utility model provides a battery package pulls out plug protection circuit, its characterized in that, battery package pulls out plug protection circuit is applied to lithium cell and charges, includes: the device comprises a switch module, an energy storage module and a controller;
The switch module is arranged in a charging loop of the lithium battery to the controller, one end of the switch module is connected with the lithium battery, and the other end of the switch module is connected with the energy storage module;
The controller is used for generating a first control signal when the lithium battery is accessed and transmitting the first control signal to the switch module;
And the switch module is used for conducting a loop between the lithium battery and the energy storage module to store energy when the first control signal is received.
2. The battery pack plug protection circuit of claim 1, wherein the switch module comprises: first to fourth resistors, a first switching tube and a second switching tube;
One end of the first resistor is connected with the controller, the other end of the first resistor is simultaneously connected with one end of the second resistor and the control end of the first switching tube, the other end of the second resistor is grounded, the input end of the first switching tube is connected with one end of the third resistor, the output end of the first switching tube is grounded, the other end of the third resistor is simultaneously connected with the control end of the second switching tube and one end of the fourth resistor, the other end of the fourth resistor is connected with the lithium battery and the input end of the second switching tube, and the output end of the second switching tube is connected with the energy storage module.
3. The battery pack plug protection circuit of claim 2, wherein the switch module further comprises: a bleed unit;
The first end of the discharge unit is connected with the energy storage module, the second end of the discharge unit is connected with the controller, and the third end of the discharge unit is grounded;
The controller is further used for generating a second control signal when the lithium battery is not connected to the controller, and transmitting the second control signal to the discharge unit;
and the discharge unit is used for controlling the energy storage module to discharge energy when receiving the second control signal.
4. The battery pack plug protection circuit of claim 3, wherein the bleed unit comprises: a third switching tube and fifth to eighth resistors;
One end of a fifth resistor is connected with the controller, the other end of the fifth resistor is simultaneously connected with one end of a sixth resistor and the control end of the third switch tube, the other end of the sixth resistor is grounded, the input end of the third switch tube is simultaneously connected with one end of a seventh resistor, the output end of the third switch tube is grounded, the other end of the seventh resistor is connected with the energy storage module, and the eighth resistor is connected with the seventh resistor in parallel.
5. The battery pack plug protection circuit of claim 1, further comprising: a charge control module;
the charging control module is arranged between the lithium battery and a charging loop of the controller;
And the charging control module is used for controlling the lithium battery to be connected into the charging loop when the lithium battery is conducted.
6. The battery pack plug-in protection circuit of claim 5, wherein the charge control module comprises: a switch button, a third capacitor, ninth to eleventh resistors and a fourth switching tube;
One end of the switch button is connected with the first end of the third capacitor, the other end of the switch button is grounded, the third capacitor is connected with the ninth resistor in parallel, the second end of the third capacitor is connected with one end of the tenth resistor, the other end of the tenth resistor is simultaneously connected with the control end of the fourth switching tube and one end of the eleventh resistor, the other end of the eleventh resistor is simultaneously connected with the input end of the fourth switching tube and the lithium battery, and the output end of the fourth switching tube is connected with the controller.
7. The battery pack plug-in protection circuit of claim 6, wherein the charge control module further comprises: a twelfth resistor, a thirteenth resistor and a fifth switching tube;
The input end of the fifth switching tube is connected with the second end of the third capacitor, the output end of the fifth switching tube is grounded, the control end of the fifth switching tube is simultaneously connected with one end of the twelfth resistor and one end of the thirteenth resistor, the other end of the twelfth resistor is grounded, and the other end of the thirteenth resistor is connected with the controller.
8. The battery pack plug-in protection circuit of claim 7, wherein the switch button is a double pole double throw switch, the charge control module further comprising: a fourteenth resistor, a fifteenth resistor, and a fourth capacitor;
The first end of the double-pole double-throw switch is connected with the first end of the third capacitor, the second end of the double-pole double-throw switch is grounded, the third end of the double-pole double-throw switch is simultaneously connected with the fourteenth resistor and one end of the fifteenth resistor, the fourth end of the double-pole double-throw switch is grounded, the other end of the fourteenth resistor is connected with a power supply, the other end of the fifteenth resistor is simultaneously connected with one end of the fourth capacitor and the controller, and the other end of the fourth capacitor is grounded.
9. The battery pack plug-in protection circuit of claim 8, wherein the charge control module further comprises: first to fourth diodes;
The anode of the first diode is connected with the first end of the third capacitor, the cathode of the first diode is connected with the first end of the double-pole double-throw switch, the anode of the second diode is simultaneously connected with the fourteenth resistor and the fifteenth resistor, the cathode of the second diode is connected with the third end of the double-pole double-throw switch, the anode of the third diode is connected with the output end of the fourth switch tube, and the cathode of the third diode is connected with the controller; and the anode of the fourth diode is connected with the controller, and the cathode of the fourth diode is connected with the thirteenth resistor.
10. An electronic device, the electronic device comprising: the battery pack plug-in protection circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323077428.XU CN221240160U (en) | 2023-11-14 | 2023-11-14 | Battery pack plug-in protection circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323077428.XU CN221240160U (en) | 2023-11-14 | 2023-11-14 | Battery pack plug-in protection circuit and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN221240160U true CN221240160U (en) | 2024-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323077428.XU Active CN221240160U (en) | 2023-11-14 | 2023-11-14 | Battery pack plug-in protection circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221240160U (en) |
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2023
- 2023-11-14 CN CN202323077428.XU patent/CN221240160U/en active Active
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