CN211830249U - Automobile starting battery protection circuit - Google Patents
Automobile starting battery protection circuit Download PDFInfo
- Publication number
- CN211830249U CN211830249U CN201922447295.8U CN201922447295U CN211830249U CN 211830249 U CN211830249 U CN 211830249U CN 201922447295 U CN201922447295 U CN 201922447295U CN 211830249 U CN211830249 U CN 211830249U
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistor
- battery
- protection
- overvoltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Protection Of Static Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses an automobile starting battery protection circuit, which comprises an overvoltage detection circuit, an overvoltage protection driving circuit, a transistor switch circuit, a voltage stabilizing circuit, an overvoltage protection prompting circuit and a reverse connection protection prompting circuit, wherein the overvoltage detection circuit is used for being connected with a battery so as to detect the voltage of the battery; the overvoltage protection driving circuit is connected with the overvoltage detection circuit and is used for sending a driving signal when the overvoltage detection circuit detects that the voltage of the battery is greater than a preset value; the transistor switch circuit is used for being connected with a load, the overvoltage protection prompting circuit and the signal output end of the overvoltage protection driving circuit so as to discharge the electric energy of the battery according to the driving signal. The utility model has the advantages of simple structure is ingenious, can guarantee charging safety well to and more humanized.
Description
Technical Field
The utility model relates to an automobile starting battery protection technical field, in particular to automobile starting battery protection circuit.
Background
With the development of the technology of the rechargeable battery, manufacturers of related battery-powered products have applied the rechargeable battery to the products produced by the manufacturers, and due to a certain difference in internal characteristics of the plurality of batteries connected in series, the imbalance between the batteries is easily increased during the charging process, thereby resulting in a reduction in the overall use efficiency and service life of the battery pack. In order to solve the above technical problems in the prior art, a person skilled in the art generally uses a balance charger to charge a battery pack, and configures a charging protection circuit for a power supply battery pack, but the charging protection circuit in the prior art still has a structural design deficiency, so that the prior charging protection circuit cannot achieve an optimal protection effect on the battery pack.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem be, provide one kind not only can realize overvoltage protection, can realize the automobile staring battery protection circuit of transposition protection moreover.
The utility model provides an automobile starting battery protection circuit, which comprises an overvoltage detection circuit, an overvoltage protection driving circuit, a transistor switch circuit, a voltage stabilizing circuit, an overvoltage protection prompting circuit and a reverse connection protection prompting circuit, wherein the overvoltage detection circuit is used for being connected with a battery so as to detect the voltage of the battery; the overvoltage protection driving circuit is connected with the overvoltage detection circuit and is used for sending a driving signal when the overvoltage detection circuit detects that the voltage of the battery is greater than a preset value; the transistor switch circuit is used for being connected with a load, the overvoltage protection prompting circuit and a signal output end of the overvoltage protection driving circuit so as to discharge electric energy for charging the battery according to the driving signal; the voltage stabilizing circuit is used for being connected with the positive electrode of the battery, the overvoltage protection prompting circuit and the reverse connection protection prompting circuit, the overvoltage protection prompting circuit is used for being electrically connected with the positive electrode of the battery and the transistor switch circuit, the signal input end of the reverse connection protection prompting circuit is grounded, and the signal output end of the reverse connection protection prompting circuit is electrically connected with the voltage stabilizing circuit.
Preferably, the overvoltage detection circuit includes a first resistor, a second resistor, a third resistor and a fourth resistor, a first end of the first resistor is used for being connected with the positive electrode of the battery, a first end of the second resistor is connected with a second end of the first resistor, a first end of the third resistor is connected with a second end of the second resistor and the overvoltage protection driving circuit, a first end of the fourth resistor is connected with a second end of the third resistor, and a second end of the fourth resistor is grounded.
Preferably, the overvoltage protection driving circuit includes a comparator, a fifth resistor, and a first capacitor, a positive-phase input terminal of the comparator is connected to the overvoltage detection circuit, a negative-phase input terminal of the comparator is connected to the first terminal of the first capacitor, an output terminal of the comparator is electrically connected to the transistor switch circuit, and a second terminal of the first capacitor is grounded; and the first end of the fifth resistor is used for being connected with the anode of the battery, and the second end of the fifth resistor is connected with the inverting input end of the comparator.
Preferably, the overvoltage protection driving circuit further comprises a thyristor, a control electrode of the thyristor is connected with the first end of the first capacitor, an anode of the thyristor is grounded, and a cathode of the thyristor is electrically connected with the inverting input end of the comparator.
Preferably, the overvoltage protection driving circuit further includes a sixth resistor and a seventh resistor, a first end of the sixth resistor is connected to the positive-phase input terminal of the comparator, a second end of the sixth resistor is electrically connected to a first end of the seventh resistor, and a second end of the seventh resistor is connected to the output terminal of the comparator.
Preferably, the voltage stabilizing circuit comprises a first voltage stabilizing diode, an anode of the first voltage stabilizing diode is connected with the power supply negative electrode connection end of the comparator, and a cathode of the first voltage stabilizing diode is grounded.
Preferably, the voltage stabilizing circuit further comprises a second voltage stabilizing diode, a second capacitor and an eighth resistor, wherein the anode of the second voltage stabilizing diode is connected with the signal output end of the reverse connection protection prompting circuit, and the cathode of the second voltage stabilizing diode is used for being connected with the anode of the battery; the second capacitor is connected with the second voltage stabilizing diode in parallel, the first end of the eighth resistor is connected with the signal output end of the reverse connection protection prompting circuit, and the second end of the eighth resistor is grounded.
Preferably, the overvoltage protection prompting circuit includes a first light emitting diode and a ninth resistor, an anode of the first light emitting diode is connected to a first end of the ninth resistor, a cathode of the first light emitting diode is connected to the transistor switch circuit, and a second end of the ninth resistor is electrically connected to a positive electrode of the power supply.
Preferably, the reverse connection protection prompting circuit includes a second light emitting diode and a tenth resistor, an anode of the second light emitting diode is connected to a first end of the tenth resistor, a cathode of the second light emitting diode is connected to an anode of the second voltage stabilizing diode, and a second end of the tenth resistor is grounded.
Preferably, the transistor switch circuit comprises at least one field effect transistor, a drain of the field effect transistor is used for being connected with the load, a source of the field effect transistor is grounded, and a gate of the field effect transistor is electrically connected to the output end of the comparator.
The utility model discloses following beneficial effect has: the utility model discloses an cooperation between overvoltage detection circuit, overvoltage protection drive circuit, transistor switch circuit, voltage stabilizing circuit, overvoltage protection suggestion circuit and the reverse connection protection suggestion circuit works as when overvoltage detection circuit monitors the charging voltage of battery too big, overvoltage protection drive circuit drives transistor switch circuit opens, makes at least partial charging current follow transistor switch circuit releases to the suggestion is carried out to guarantee charging safety, and more humanized. In addition, in the assembly process, when the battery is reversely connected, the reverse connection protection prompting circuit is used for reverse connection protection and prompting, so that the misassembly is avoided, and the installation efficiency is improved.
Drawings
Fig. 1 is a circuit diagram of an embodiment of the protection circuit for the starting battery of the vehicle of the present invention;
fig. 2 is a circuit diagram of another embodiment of the battery protection circuit for starting a vehicle according to the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples. It should be noted that, if there is no conflict, the embodiments and various features in the embodiments of the present invention may be combined with each other, and all are within the scope of the present invention.
Example 1
Referring to fig. 1, the present invention provides a battery protection circuit for automobile starting, which includes an overvoltage detection circuit 1, an overvoltage protection driving circuit 2, a transistor switch circuit 3, a voltage stabilizing circuit 4, an overvoltage protection prompting circuit 5 and a reverse connection protection prompting circuit 6, wherein the overvoltage detection circuit 1 is used for being connected to a battery to detect the voltage of the battery. The overvoltage protection driving circuit 2 is connected with the overvoltage detection circuit 1 and used for sending out a driving signal when the overvoltage detection circuit 1 detects that the voltage of the battery is larger than a preset value.
The transistor switch circuit 3 is used for being connected with a load, the overvoltage protection prompting circuit 5 and the signal output end of the overvoltage protection driving circuit 2 so as to discharge electric energy for charging the battery according to the driving signal. The voltage stabilizing circuit 4 is used for being connected with the positive electrode of the battery, the overvoltage protection prompting circuit 5 and the reverse connection protection prompting circuit 6, the overvoltage protection prompting circuit 5 is used for being electrically connected with the positive electrode of the battery and the transistor switch circuit 3, the signal input end of the reverse connection protection prompting circuit 6 is grounded, and the signal output end of the reverse connection protection prompting circuit 6 is electrically connected with the voltage stabilizing circuit 4. In this embodiment, the positive connection terminal VBAT is connected to the positive electrode of the battery, and the LOAD is connected through the LOAD connection terminal LOAD.
The overvoltage detection circuit 1 comprises a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4, the first end of the first resistor R1 is used for being connected with the anode of the battery, the first end of the second resistor R2 is connected with the second end of the first resistor R1, the first end of the third resistor R3 is connected with the second end of the second resistor R2 and the overvoltage protection driving circuit 2, the first end of the fourth resistor R4 is connected with the second end of the third resistor R3, and the second end of the fourth resistor R4 is grounded. Through the matching of a plurality of resistors, the design and production are convenient.
The overvoltage protection driving circuit 2 comprises a comparator U, a fifth resistor R5 and a first capacitor C1, wherein a non-inverting input terminal of the comparator U is connected with a first terminal of a third resistor R3 in the overvoltage detection circuit 1. The inverting input terminal of the comparator U is connected to the first terminal of the first capacitor C1, the output terminal of the comparator U is electrically connected to the transistor switch circuit 3, and the second terminal of the first capacitor C1 is grounded. The first end of the fifth resistor R5 is used for being connected with the anode of the battery, and the second end of the fifth resistor R5 is connected with the inverting input end of the comparator U.
The overvoltage protection driving circuit 2 further comprises a thyristor T, a control electrode of the thyristor T is connected with the first end of the first capacitor C1, an anode of the thyristor T is grounded, and a cathode of the thyristor T is electrically connected with an inverting input end of the comparator U. Through the matching of the thyristor T and the first capacitor C1, the output signal of the overvoltage protection driving circuit 2 is not easily affected by the battery voltage, and the stability is improved.
The overvoltage protection driving circuit 2 further includes a sixth resistor R6 and a seventh resistor R7, a first end of the sixth resistor R6 is connected to the non-inverting input terminal of the comparator U, a second end of the sixth resistor R6 is electrically connected to a first end of the seventh resistor R7, and a second end of the seventh resistor R7 is connected to the output terminal of the comparator U. The sixth resistor R6 and the seventh resistor R7 have the function of voltage feedback.
The voltage stabilizing circuit 4 comprises a first voltage stabilizing diode D1, a second voltage stabilizing diode D2, a second capacitor C2 and an eighth resistor R8, wherein the anode of the first voltage stabilizing diode D1 is connected with the power supply cathode connection end of the comparator U, and the cathode of the first voltage stabilizing diode D1 is grounded. When the voltage of the battery is normal and the connection is correct, the first zener diode D1 is turned on. The anode of the second zener diode D2 is connected to the signal output terminal of the reverse connection protection prompting circuit 6, and the cathode of the second zener diode D2 is used to connect to the anode of the battery. The second capacitor C2 is connected in parallel with the second zener diode D2, a first end of the eighth resistor R8 is connected to the signal output end of the reverse connection protection prompting circuit 6, and a second end of the eighth resistor R8 is grounded.
The overvoltage protection prompting circuit 5 comprises a first light-emitting diode D3 and a ninth resistor R9, wherein the anode of the first light-emitting diode D3 is connected with the first end of the ninth resistor R9, the cathode of the first light-emitting diode D3 is connected with the transistor switch circuit 3, and the second end of the ninth resistor R9 is electrically connected with the anode of the power supply.
The reverse connection protection prompting circuit 6 comprises a second light emitting diode D4 and a tenth resistor R10, wherein the anode of the second light emitting diode D4 is connected with the first end of the tenth resistor R10, the cathode of the second light emitting diode D4 is connected with the anode of the second voltage stabilizing diode D2, and the second end of the tenth resistor R10 is grounded. In the assembling process, if the battery is reversely connected, the second light emitting diode D4 emits light, the second voltage stabilizing diode D2 is conducted, and the current is led out, so that the components are well protected from being damaged. The circuit is ingenious in design, simple in structure and low in cost, and can well prompt a user, so that the user experience is high.
The transistor switch circuit 3 comprises a field effect transistor, a drain electrode of the field effect transistor is used for being connected with the load, a source electrode of the field effect transistor is grounded, and a grid electrode of the field effect transistor is electrically connected to an output end of the comparator U. In the present embodiment, the fets include a first fet Q1, a second fet Q2, and a third fet Q3. When the overvoltage detection circuit 1 detects that the voltage of the battery is greater than the preset value, the comparator U outputs a high level signal, the first light emitting diode D3 emits light, and the first field effect transistor Q1, the second field effect transistor Q2 and the third field effect transistor Q3 are turned on, so that excessive electric energy can be released. The first light emitting diode D3 emits light to prompt the user, so that the safety can be improved.
Example 2
Referring to fig. 2, the structure of the present embodiment is similar to that of embodiment 1, and the main difference is that: the embodiment further comprises a booster circuit 7 and a locking circuit 8, wherein the booster circuit 7 is connected with the overvoltage protection driving circuit 2 and is used for boosting a voltage signal output by the overvoltage protection driving circuit 2 to a preset value. The latch circuit 8 is connected to the booster circuit 7 and the transistor switch circuit 3, and latches a switching state of the transistor switch circuit 3. That is, when the battery is fully charged, it is kept from being recharged, thereby better protecting the battery from the magnitude of the voltage on the charger side during charging.
The boost circuit 7 comprises a boost chip M, a first inductor L, a third capacitor C3, a fourth capacitor C4, a third zener diode D5, an eleventh resistor R11 and a twelfth resistor R12, wherein a first end of the first inductor L is electrically connected with the voltage stabilizing circuit 4 and a fifth pin of the boost chip M, a second end of the first inductor L is connected with an anode of the third zener diode D5 and the first pin of the boost chip M, a first end of the third capacitor C3 is electrically connected with the fourth pin of the boost chip M and the voltage stabilizing circuit 4, and a second end of the third capacitor C3 is grounded. A first end of the fourth capacitor C4 is connected with a cathode of the third zener diode D5, and a second end of the fourth capacitor C4 is grounded; a first end of the eleventh resistor R11 is connected to a cathode of the third zener diode D5, a second end of the eleventh resistor R11 is connected to a first end of the twelfth resistor R12, a first end of the twelfth resistor R12 is connected to the third pin of the boost chip M, and a second end of the twelfth resistor R12 is grounded. In this embodiment, the voltage can be raised to 12 volts, and the circuit has the advantage of stable and reliable output voltage. It is understood that the type of the boost chip may be selected according to the requirement, and is not particularly limited herein.
The locking circuit 8 includes a first triode Q4, a second triode Q5, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16 and a seventeenth resistor R17, wherein a base of the first triode Q4 is connected to a first end of the thirteenth resistor R13 and a first end of the fourteenth resistor R14, a collector of the first triode Q4 is connected to a first end of the fifteenth resistor R15, and an emitter of the first triode Q4 is grounded. A second terminal of the thirteenth resistor R13 is connected to the signal output terminal of the overvoltage protection driving circuit 2, and a second terminal of the fourteenth resistor R14 is grounded.
A base of the second triode Q5 is connected to the first end of the sixteenth resistor R16 and the second end of the fifteenth resistor R15, a collector of the second triode Q5 is connected to the first end of the seventeenth resistor R17 and the transistor switch circuit 3, and an emitter of the second triode Q5 is connected to the second end of the sixteenth resistor R16 and the cathode of the third zener diode D5. A second end of the seventeenth resistor R17 is grounded. The latch circuit 8 latches, and thus the state of the transistor switch circuit 3 can be stably controlled.
To sum up, the utility model discloses an cooperation between overvoltage detection circuit 1, overvoltage protection drive circuit 2, transistor switch circuit 3, voltage stabilizing circuit 4, overvoltage protection prompting circuit 5 and the reverse connection protection prompting circuit 6 works as overvoltage detection circuit 1 monitors the charging voltage of battery when too big, overvoltage protection drive circuit 2 drive transistor switch circuit 3 opens, makes at least partial charging current follow transistor switch circuit 3 releases to the suggestion is carried out to charge safety has been guaranteed, and more humanized. In addition, in the assembly process, when the batteries are reversely connected, reverse connection protection and prompt are carried out through the reverse connection protection prompt circuit 6, so that misassembly is avoided, and the installation efficiency is improved.
The above detailed description is made on the protection circuit for the automobile starting battery provided by the utility model, and the principle and the implementation mode of the utility model are explained by applying a specific example, and the description of the above embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. To sum up, this description content only does the embodiment of the utility model, not therefore the restriction the patent scope of the utility model, all utilize the equivalent structure or the equivalent flow transform that the content of the description and the attached drawing was done, or directly or indirectly use in other relevant technical field, all the same reason is included in the patent protection scope of the utility model, should not be understood as right the utility model discloses a restriction.
Claims (10)
1. The protection circuit for the automobile starting battery is characterized by comprising an overvoltage detection circuit, an overvoltage protection driving circuit, a transistor switch circuit, a voltage stabilizing circuit, an overvoltage protection prompting circuit and a reverse connection protection prompting circuit, wherein the overvoltage detection circuit is used for being connected with a battery to detect the voltage of the battery; the overvoltage protection driving circuit is connected with the overvoltage detection circuit and is used for sending a driving signal when the overvoltage detection circuit detects that the voltage of the battery is greater than a preset value; the transistor switch circuit is used for being connected with a load, the overvoltage protection prompting circuit and a signal output end of the overvoltage protection driving circuit so as to discharge electric energy for charging the battery according to the driving signal; the voltage stabilizing circuit is used for being connected with the positive electrode of the battery, the overvoltage protection prompting circuit and the reverse connection protection prompting circuit, the overvoltage protection prompting circuit is used for being electrically connected with the positive electrode of the battery and the transistor switch circuit, the signal input end of the reverse connection protection prompting circuit is grounded, and the signal output end of the reverse connection protection prompting circuit is electrically connected with the voltage stabilizing circuit.
2. The protection circuit for the battery during the starting of the vehicle according to claim 1, wherein the overvoltage detection circuit comprises a first resistor, a second resistor, a third resistor and a fourth resistor, a first end of the first resistor is used for being connected with the positive electrode of the battery, a first end of the second resistor is connected with a second end of the first resistor, a first end of the third resistor is connected with a second end of the second resistor and the overvoltage protection driving circuit, a first end of the fourth resistor is connected with a second end of the third resistor, and a second end of the fourth resistor is grounded.
3. The automobile starting battery protection circuit according to claim 1 or 2, wherein the overvoltage protection driving circuit comprises a comparator, a fifth resistor and a first capacitor, a positive phase input end of the comparator is connected with the overvoltage detection circuit, a negative phase input end of the comparator is connected with a first end of the first capacitor, an output end of the comparator is electrically connected with the transistor switch circuit, and a second end of the first capacitor is grounded; and the first end of the fifth resistor is used for being connected with the anode of the battery, and the second end of the fifth resistor is connected with the inverting input end of the comparator.
4. The vehicle-starting battery protection circuit according to claim 3, wherein the overvoltage protection driving circuit further comprises a thyristor, a control electrode of the thyristor is connected to the first end of the first capacitor, an anode of the thyristor is grounded, and a cathode of the thyristor is electrically connected to the inverting input terminal of the comparator.
5. The battery protection circuit for starting a vehicle according to claim 3, wherein the overvoltage protection driving circuit further comprises a sixth resistor and a seventh resistor, a first end of the sixth resistor is connected to the non-inverting input terminal of the comparator, a second end of the sixth resistor is electrically connected to a first end of the seventh resistor, and a second end of the seventh resistor is connected to the output terminal of the comparator.
6. The vehicle starting battery protection circuit according to claim 3, wherein the voltage regulator circuit comprises a first zener diode, an anode of the first zener diode is connected to the power supply negative connection terminal of the comparator, and a cathode of the first zener diode is grounded.
7. The protection circuit for the battery during starting of the vehicle as claimed in claim 6, wherein the voltage-stabilizing circuit further comprises a second zener diode, a second capacitor and an eighth resistor, wherein an anode of the second zener diode is connected to the signal output terminal of the reverse connection protection prompting circuit, and a cathode of the second zener diode is used for being connected to the anode of the battery; the second capacitor is connected with the second voltage stabilizing diode in parallel, the first end of the eighth resistor is connected with the signal output end of the reverse connection protection prompting circuit, and the second end of the eighth resistor is grounded.
8. The vehicle-starting battery protection circuit according to claim 7, wherein the over-voltage protection prompting circuit comprises a first light emitting diode and a ninth resistor, wherein an anode of the first light emitting diode is connected with a first end of the ninth resistor, a cathode of the first light emitting diode is connected with the transistor switch circuit, and a second end of the ninth resistor is used for being electrically connected with a positive electrode of the power supply.
9. The protection circuit for battery during starting of vehicle as claimed in claim 7, wherein the reverse connection protection prompting circuit comprises a second light emitting diode and a tenth resistor, wherein the anode of the second light emitting diode is connected to the first end of the tenth resistor, the cathode of the second light emitting diode is connected to the anode of the second voltage stabilizing diode, and the second end of the tenth resistor is grounded.
10. The vehicle-start battery protection circuit of claim 3, wherein the transistor switching circuit comprises at least one FET, a drain of the FET is adapted to be connected to the load, a source of the FET is connected to ground, and a gate of the FET is electrically connected to the output of the comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922447295.8U CN211830249U (en) | 2019-12-30 | 2019-12-30 | Automobile starting battery protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922447295.8U CN211830249U (en) | 2019-12-30 | 2019-12-30 | Automobile starting battery protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211830249U true CN211830249U (en) | 2020-10-30 |
Family
ID=73040491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922447295.8U Active CN211830249U (en) | 2019-12-30 | 2019-12-30 | Automobile starting battery protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211830249U (en) |
-
2019
- 2019-12-30 CN CN201922447295.8U patent/CN211830249U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206099417U (en) | Battery charging device | |
| CN204290416U (en) | A kind of multiple-energy-source emergency power supply system | |
| CN208739450U (en) | Emergency LED drive system | |
| CN211830249U (en) | Automobile starting battery protection circuit | |
| Tseng et al. | High frequency positive/negative pulse charger with power factor correction | |
| CN103094975A (en) | Storage battery charging circuit and light-emitting diode (LED) lamp thereof | |
| CN208638066U (en) | A kind of charger system | |
| CN104184205A (en) | Power switching circuit and lighting equipment | |
| CN2174006Y (en) | Multifunctional charger | |
| CN212366848U (en) | Automobile starting battery | |
| CN203481904U (en) | Charger with battery reverse connection detection and protection functions | |
| CN215733584U (en) | Starting connecting device and starting power supply | |
| CN210724292U (en) | Lithium battery charger with multi-mode charging function | |
| CN209748236U (en) | Discrete power supply charging circuit | |
| CN110970981A (en) | Automobile starting battery | |
| CN208675108U (en) | It is a kind of to be depressured the direct-current switch power supply conversion circuit that boosted | |
| CN206962696U (en) | A kind of low electric flyback sourse circuit suitable for onboard system | |
| CN105515112A (en) | Low-power-consumption charging control system | |
| CN201639483U (en) | Direct-current (DC) power supply conversion control device and DC power supply | |
| CN102593812B (en) | Constant-power discharge circuit of capacitor | |
| CN213782895U (en) | Charging circuit and vehicle | |
| CN211127579U (en) | High-efficiency different-voltage switching booster circuit | |
| CN218976361U (en) | Super capacitor charge-discharge control circuit | |
| CN211792141U (en) | Emergency lamp circuit | |
| CN213213142U (en) | Power management system of handheld device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |