CN116722631B - Wide voltage output charger interface circuit - Google Patents
Wide voltage output charger interface circuit Download PDFInfo
- Publication number
- CN116722631B CN116722631B CN202311007945.1A CN202311007945A CN116722631B CN 116722631 B CN116722631 B CN 116722631B CN 202311007945 A CN202311007945 A CN 202311007945A CN 116722631 B CN116722631 B CN 116722631B
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- signal
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- 238000005070 sampling Methods 0.000 claims abstract description 29
- 238000007600 charging Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 29
- 238000004804 winding Methods 0.000 claims description 18
- 238000010586 diagram Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00036—Charger exchanging data with battery
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
- H02J7/0032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits disconnection of loads if battery is not under charge, e.g. in vehicle if engine is not running
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
- H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a wide voltage output charger interface circuit, which comprises a pre-charging circuit, a switch circuit, a voltage sampling circuit and a battery detection in-place circuit, wherein the pre-charging circuit comprises a diode D1 and a resistor R1 which are connected in series, the switch circuit is used for controlling a switch for circuit route selection, the switch circuit comprises three switches, the three switches are initially set to be in an off state, the voltage sampling circuit comprises at least three sampling resistors, each sampling resistor is connected between two ends of a power output port in series, and the battery detection in-place circuit comprises two signals and a signal processing unit which are led out from the power output port, so that the detection is accurate, the cost is reduced, and the loss is reduced.
Description
Technical Field
The invention relates to the technical field of battery charging interfaces, in particular to a wide-voltage output charger interface circuit.
Background
In the present life, the application of batteries is more and more wide, as small as mobile phones and unmanned aerial vehicles, as large as electric forklifts, new energy automobiles, new energy ships and the like. The battery voltage of these devices varies from a few volts, tens of volts to hundreds of volts. The requirement of the wide voltage range on the battery charger is also higher and higher, and a charger which can be compatible with batteries in various voltage ranges becomes a new requirement of equipment manufacturers, but the existing switching circuit is switched to change the serial-parallel connection relation of output windings so as to expand the design of the output voltage range, and the defects of higher voltage stress, easy ignition phenomenon in the battery plugging process, low service life and the like are also present.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a wide voltage output charger interface circuit that can solve the battery plug sparking problem and has a simple structure.
The utility model provides a wide voltage output charger interface circuit, includes precharge circuit, switch circuit, voltage sampling circuit and battery detection in-place circuit, precharge circuit includes diode D1 and resistance R1 series connection, switch circuit is used for the switch of control circuit route selection, voltage sampling circuit includes at least three sampling resistor, and each sampling resistor is established ties between power output port both ends, battery detection in-place circuit includes drawing out two signals and signal processing unit on the power port.
Further, the power port has 4 interfaces, namely an anode output interface, a cathode output interface, a signal port A and a signal port B, the battery port has an anode interface BAT+, a cathode interface BAT-and two total signals PS_ON connected together, the anode interface BAT+ and the cathode interface BAT-of the battery port are correspondingly connected with the anode output interface and the cathode output interface of the power port, and the total signals PS_ON of the battery port are connected with the signal port A and the signal port B of the power port.
Further, the positive output interface of the power supply is connected with a capacitor C1, the negative output interface of the power supply is connected with a capacitor C2, the capacitor C1 and the capacitor C2 are respectively connected in series with the diode D1 and two sides of the resistor R1, the resistor R1 and the battery voltage determine the initial current, and the current value is limited by the resistor R1.
Further, the signal port A and the signal port B are short-circuited by the total signal PS_ON of the battery port, the signal processing unit comprises a signal processor, the signal processor converts the short-circuited signal into a high level and transmits the high level to an external singlechip, and the singlechip immediately judges the ON-site condition of the battery after receiving the high level.
Further, the voltage sampling circuit is used for detecting voltages at two ends of the battery, the detected voltages are transmitted to the singlechip, the power port is connected with two winding groups, and the connection mode of the winding groups is determined by the detected voltages.
Further, the switch circuit includes three switches, namely a switch 1, a switch 2 and a switch 3, wherein initial states of the three switches are all open states, the three switches are connected to the power supply port in parallel according to sequences of the switch 1, the switch 2 and the switch 3, multiple types are formed based on detected voltage data, including a low-voltage state and a high-voltage state, when the detected voltage data is in the low-voltage state, the switch 1 in the switch circuit is open, the switch 2 and the switch 3 are closed, the winding group is connected in parallel, the diode cathode is connected with the positive output interface of the power supply port through the resistor R1, the anode of the diode D1 is connected with the negative output interface of the power supply port, the pre-charging circuit does not consume energy, when the detected voltage data is in the high-voltage state, the switch 1 in the switch circuit is closed, the switch 2 and the switch 3 are open, the winding group is connected in series, and the diode D1 and the resistor R1 are not shorted.
Further, the switch 1 in the switch circuit is connected in series between the capacitor C1 and the capacitor C2, the voltage stress at two ends of the switch 2 and the switch 3 is reduced to half of the initial voltage value by the voltage division of the capacitor C1 and the capacitor C2 in series, and after the switch circuit is closed, the voltage of the battery is detected to control the output voltage of the charger.
Further, after the battery terminal is pulled out after the charging is completed, the signal port A and the signal port B are opened, the singlechip receives information through the signal processor and judges that the information is not in place, the power supply output is closed, and the switch circuit is completely disconnected and waits for the next battery charging to be connected with a signal.
The wide voltage output charger interface circuit comprises a pre-charging circuit, a switch circuit, a voltage sampling circuit and a battery detection in-place circuit, wherein the pre-charging circuit comprises a diode D1 and a resistor R1 which are connected in series, the diode D1 and the two ends of the resistor R1 are respectively connected in series with a capacitor, the switch circuit is used for controlling a switch for circuit route selection, the voltage sampling circuit comprises at least three sampling resistors, each sampling resistor is connected between two ends of a power output port in series and used for detecting voltage to be transmitted to a singlechip, and the battery detection in-place circuit comprises two signals and a signal processing unit which are led out of the power port.
Drawings
Fig. 1 is a schematic circuit diagram of a wide voltage output charger interface circuit according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a signal interface in a wide voltage output charger interface circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific embodiments and drawings.
Referring to fig. 1-2, a wide voltage output charger interface circuit provided by an embodiment of the present invention includes a pre-charging circuit, a switching circuit, a voltage sampling circuit and a battery detection in-place circuit, where the pre-charging circuit includes a diode D1 and a resistor R1 connected in series, the switching circuit is used to control a switch for circuit routing, the voltage sampling circuit includes at least three sampling resistors, each of which is connected in series between two ends of a power output port, and the battery detection in-place circuit includes two signal and signal processing units led out from the power output port.
Specifically, the power port has 4 interfaces, which are respectively an anode output interface, a cathode output interface, a signal port A and a signal port B, the battery port has an anode interface BAT+, a cathode interface BAT-and two total signals PS_ON connected together, the anode interface BAT+ and the cathode interface BAT-of the battery port are correspondingly connected with the anode output interface and the cathode output interface of the power port, and the total signals PS_ON of the battery port are connected with the signal port A and the signal port B of the power port.
Specifically, the positive output interface of the power supply is connected with a capacitor C1, the negative output interface of the power supply is connected with a capacitor C2, the capacitor C1 and the capacitor C2 are respectively connected with two sides of the diode D1 and the resistor R1 in series, current flows out from the positive interface BAT+ of the battery port, flows to the capacitor C1, the diode D1, the resistor R1 and the capacitor C2 through the positive output interface of the power supply port, current flows out from the negative interface BAT-of the battery port again, the resistor R1 and the battery voltage determine initial current, the current value is limited by the resistor R1, and the occurrence of the sparking situation of the port is avoided.
Specifically, the signal port A and the signal port B are short-circuited by the total signal PS_ON of the battery port, the signal processing unit comprises a signal processor, the signal processor converts the short-circuited signal into a high level and transmits the high level to an external singlechip, the singlechip receives the high level and immediately judges the ON-site condition of the battery, and the high level is directly transmitted to the singlechip to greatly reduce the cost of components.
Specifically, the voltage sampling circuit is used for detecting voltages at two ends of the battery, the detected voltages are transmitted to the singlechip, the power port is connected with two winding groups, and the connection mode of the winding groups is determined by the detected voltages.
Specifically, the switch circuit includes three switches, namely a switch 1, a switch 2 and a switch 3, wherein initial states of the three switches are all open states, the three switches are connected to the power supply port in parallel according to sequences of the switch 1, the switch 2 and the switch 3, multiple types are formed based on detected voltage data, including a low-voltage state and a high-voltage state, when the detected voltage data is in the low-voltage state, the switch 1 in the switch circuit is open, the switch 2 and the switch 3 are closed, the winding group is connected in parallel, the diode cathode is connected with the positive electrode output interface of the power supply port through the resistor R1, the anode of the diode D1 is connected with the negative electrode output interface of the power supply port, the pre-charging circuit does not consume energy, when the detected voltage data is in the high-voltage state, the switch 1 in the switch circuit is closed, the switch 2 and the switch 3 are open, the winding group is connected in series, and the diode D1 and the resistor R1 are not shorted.
Specifically, the switch 1 in the switch circuit is connected in series between the capacitor C1 and the capacitor C2, voltage stress at two ends of the switch 2 and the switch 3 is reduced to half of an initial voltage value by voltage division of the capacitor C1 and the capacitor C2 in series, and after the switch circuit is closed, the voltage of the battery is detected to control the output voltage of the charger, so that the constant-current charging function is realized.
Specifically, after the battery terminal is charged, the signal port A and the signal port B are opened, the singlechip receives information through the signal processor and judges that the information is not in place, the power supply output is closed, the switch circuit is completely disconnected, and the next battery charging is waited for accessing signals, so that the power supply conversion efficiency is improved.
As shown in fig. 1-2, the battery terminal interface and the power terminal interface are correspondingly connected together in positive and negative, the diode D1 and the resistor R1 form a pre-charge circuit, the switch circuit has three control switches, namely a switch 1, a switch 2 and a switch 3, the three switches are connected in parallel to the power port in the sequence of the switch 1, the switch 2 and the switch 3, the three control switches are initially set to be in an off state, the voltage sampling circuit comprises at least three sampling resistors, each sampling resistor is connected in series between two ends of the power output port, and the battery detection in-place circuit comprises two signal and signal processing units led out from the power port.
The wide voltage output charger interface circuit comprises a pre-charging circuit, a switch circuit, a voltage sampling circuit and a battery detection in-place circuit, wherein the pre-charging circuit comprises a diode D1 and a resistor R1 which are connected in series, the diode D1 and two sides of the resistor R1 are respectively connected with a capacitor C1 and a capacitor C2, the switch circuit is used for controlling a switch for circuit route selection, the voltage sampling circuit comprises at least three sampling resistors, each sampling resistor is connected between two ends of a power output port in series and used for detecting voltage to be transmitted to a singlechip, and the battery detection in-place circuit comprises two signal and signal processing units led out of the power output port.
It should be noted that the present invention is not limited to the above embodiments, and those skilled in the art can make other changes according to the inventive spirit of the present invention, and these changes according to the inventive spirit of the present invention should be included in the scope of the present invention as claimed.
Claims (4)
1. The wide voltage output charger interface circuit is characterized by comprising a pre-charging circuit, a switch circuit, a voltage sampling circuit and a battery detection in-place circuit, wherein the pre-charging circuit comprises a diode D1 and a resistor R1 which are connected in series, the switch circuit is used for controlling a switch for circuit route selection, the voltage sampling circuit comprises at least three sampling resistors, each sampling resistor is connected between two ends of a power output port in series, the battery detection in-place circuit comprises a power port, two signal and signal processing units are led out of the power port, the power port is provided with 4 interfaces, namely an anode output interface, a cathode output interface, a signal port A and a signal port B, the voltage sampling circuit is used for detecting voltages at two ends of a battery, the detected voltages are transmitted to a singlechip, the power port is connected with two winding groups, winding 1 and winding 2 are respectively arranged, the winding 1 is provided with an anode port U_out1+ and a cathode port U_out1-, the winding 2 is provided with an anode port U_out2+ and a cathode port U_out2-, the connection mode of the winding is determined by detected voltage, the anode output interface is connected with a capacitor C1, the cathode output interface is connected with a capacitor C2, the capacitor C1 and the capacitor C2 are respectively connected with two sides of a diode D1 and a resistor R1 in series, the resistor R1 and the battery voltage determine initial current, the current is limited by the resistor R1, the switching circuit comprises three switches, namely a switch 1, a switch 2 and a switch 3, the initial states of the three switches are all in an off state, and the three switches are connected in parallel to the power supply port according to the sequence of the switch 1, the switch 2 and the switch 3, the switch 1 is connected in series between the capacitor C1 and the capacitor C2 in the switch circuit, voltage stress at two ends of the switch 2 and the switch 3 is reduced to be half of an initial voltage value by series voltage division of the capacitor C1 and the capacitor C2, after the switch circuit is closed, voltage of a battery is detected to control output voltage of a charger, the switch 1 is connected between a negative electrode port U_out1-and a positive electrode port U_out2+ and is connected in parallel with a circuit of a diode D1 and a resistor R1, the switch 2 is connected between the negative electrode port U_out1-and the negative electrode port U_out2-, the switch 3 is connected between a positive electrode port U_out1+ and the positive electrode port U_out2+, a plurality of voltage data are formed based on detected voltage data, the voltage data comprise a low voltage state and a high voltage state, when the detected voltage data is in the low voltage state, the switch 1 in the switch circuit is opened, the switch 2 and the switch 3 are closed, the winding group is connected in parallel, the diode cathode is connected with the positive electrode output interface of the power supply port through the resistor R1, the positive electrode port D is connected with the positive electrode port D1, the switch 1 is connected in the voltage pre-connection, the voltage loss is detected when the voltage data is not connected with the winding group, and the voltage loss is detected in the winding group is the voltage loss 1, and the voltage loss is detected when the voltage loss is detected.
2. The wide voltage output charger interface circuit of claim 1, wherein the battery port has a positive electrode interface bat+, a negative electrode interface BAT-and two total signals ps_on connected together, the positive electrode interface bat+, BAT-of the battery port is correspondingly connected with the positive electrode output interface and the negative electrode output interface of the power supply port, and the total signals ps_on of the battery port are connected with the signal port a and the signal port B of the power supply port.
3. The interface circuit of claim 2, wherein the signal port a and the signal port B are shorted by a total signal ps_on of the battery port, the signal processing unit includes a signal processor, the signal processor converts the shorted signal into a high level and transmits the high level to an external singlechip, and the singlechip immediately judges the ON-site condition of the battery after receiving the high level.
4. A wide voltage output charger interface circuit as in claim 3 wherein when charging is completed, the battery terminal is pulled out, said signal port a and said signal port B are opened, said single chip receives information via said signal processor and determines that it is out of place, the power supply output is turned off, said switching circuit is all turned off, and the next battery charge is waited for access signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311007945.1A CN116722631B (en) | 2023-08-11 | 2023-08-11 | Wide voltage output charger interface circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311007945.1A CN116722631B (en) | 2023-08-11 | 2023-08-11 | Wide voltage output charger interface circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116722631A CN116722631A (en) | 2023-09-08 |
| CN116722631B true CN116722631B (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311007945.1A Active CN116722631B (en) | 2023-08-11 | 2023-08-11 | Wide voltage output charger interface circuit |
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| KR20110131912A (en) * | 2010-06-01 | 2011-12-07 | 명지대학교 산학협력단 | Battery charger for a vehicle with wide output voltage range |
| CN106505690A (en) * | 2016-12-26 | 2017-03-15 | 苏州绿恺动力电子科技有限公司 | A kind of car emergency startup power supply safety management system |
| CN111600368A (en) * | 2020-05-28 | 2020-08-28 | 深圳可立克科技股份有限公司 | LLC circuit for wide-output-voltage-range high-power charger and control method thereof |
| CN111856297A (en) * | 2020-07-06 | 2020-10-30 | 深圳拓邦股份有限公司 | In-bin battery on-site detection device in power change cabinet |
| CN214013898U (en) * | 2020-11-09 | 2021-08-20 | 深圳拓邦股份有限公司 | Charge pre-charging protection control circuit and charging device |
| WO2021218169A1 (en) * | 2020-04-26 | 2021-11-04 | 深圳市大疆创新科技有限公司 | In-position detection circuit, charger and electronic device |
| CN113890367A (en) * | 2021-08-25 | 2022-01-04 | 深圳航天科技创新研究院 | Reconfigurable resonance type wide-voltage-range power converter circuit |
| CN116260228A (en) * | 2023-05-16 | 2023-06-13 | 深圳市高斯宝电气技术有限公司 | Battery in-place detection circuit for digital power supply and charging control method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752635A (en) * | 2019-10-12 | 2020-02-04 | 山东大学 | Online capacity monitoring and charging and discharging dual-state equalization circuit and method for series battery pack |
-
2023
- 2023-08-11 CN CN202311007945.1A patent/CN116722631B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110131912A (en) * | 2010-06-01 | 2011-12-07 | 명지대학교 산학협력단 | Battery charger for a vehicle with wide output voltage range |
| CN106505690A (en) * | 2016-12-26 | 2017-03-15 | 苏州绿恺动力电子科技有限公司 | A kind of car emergency startup power supply safety management system |
| WO2021218169A1 (en) * | 2020-04-26 | 2021-11-04 | 深圳市大疆创新科技有限公司 | In-position detection circuit, charger and electronic device |
| CN111600368A (en) * | 2020-05-28 | 2020-08-28 | 深圳可立克科技股份有限公司 | LLC circuit for wide-output-voltage-range high-power charger and control method thereof |
| CN111856297A (en) * | 2020-07-06 | 2020-10-30 | 深圳拓邦股份有限公司 | In-bin battery on-site detection device in power change cabinet |
| CN214013898U (en) * | 2020-11-09 | 2021-08-20 | 深圳拓邦股份有限公司 | Charge pre-charging protection control circuit and charging device |
| CN113890367A (en) * | 2021-08-25 | 2022-01-04 | 深圳航天科技创新研究院 | Reconfigurable resonance type wide-voltage-range power converter circuit |
| CN116260228A (en) * | 2023-05-16 | 2023-06-13 | 深圳市高斯宝电气技术有限公司 | Battery in-place detection circuit for digital power supply and charging control method thereof |
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| CN116722631A (en) | 2023-09-08 |
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