CN113433486A - System and method for detecting and identifying positive and negative connection of emergency starting power supply under ultra-low voltage - Google Patents

System and method for detecting and identifying positive and negative connection of emergency starting power supply under ultra-low voltage Download PDF

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Publication number
CN113433486A
CN113433486A CN202110617216.2A CN202110617216A CN113433486A CN 113433486 A CN113433486 A CN 113433486A CN 202110617216 A CN202110617216 A CN 202110617216A CN 113433486 A CN113433486 A CN 113433486A
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China
Prior art keywords
clamp
positive
power supply
connection
negative
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CN202110617216.2A
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CN113433486B (en
Inventor
张忠仁
王定校
熊印宝
唐睿
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Shanghai Power Station Co Ltd
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Shanghai Power Station Co Ltd
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    • 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
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
    • G01R31/68—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board
    • G01R31/69—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board of terminals at the end of a cable or a wire harness; of plugs; of sockets, e.g. wall sockets or power sockets in appliances
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details
    • G01R1/04—Housings; Supporting members; Arrangements of terminals
    • G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
    • G01R1/0416—Connectors, terminals
    • 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]
    • G01R31/3644—Constructional arrangements
    • 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]
    • G01R31/392—Determining battery ageing or deterioration, e.g. state of health
    • 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
    • G01R31/40—Testing power supplies

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Secondary Cells (AREA)

Abstract

A system for detecting and identifying positive and negative connections of an emergency starting power supply at ultralow voltage comprises a system working power supply module, a positive and negative sampling detection module, a clamp on-off information acquisition module and a system control and display module. The invention detects whether the clamp of the emergency starting power supply is connected or not through the clamp on-off information acquisition module; detecting whether the positive polarity and the negative polarity of the clamp connection are correct or not through a positive and negative sampling detection module; when the positive and negative connection sampling detection module cannot normally detect the connection signal of the clamp, the voltage of the clamp end is increased, and then the clamp is judged to be short-circuited or connected without a battery. The invention can avoid the damage of the automobile and the emergency starting power supply caused by the ultra-low voltage or short circuit fault of the automobile battery, on one hand, the safety of the automobile is ensured, on the other hand, the service life of the emergency starting power supply is prolonged, and the reliability and the safety of the emergency starting power supply are greatly improved.

Description

System and method for detecting and identifying positive and negative connection of emergency starting power supply under ultra-low voltage
Technical Field
The invention belongs to the field of power supplies, and particularly relates to a system and a method for detecting and identifying positive and negative connections of an emergency starting power supply under ultra-low voltage.
Background
With the rapid development of the automobile industry, the automobile holding capacity of the world is continuously increased, the requirements and the day for automobile after-sale maintenance and emergency rescue are increased sharply, and the problem that almost every driver faces the problem that the automobile cannot be started due to the power shortage of the battery. When the automobile battery is severely short-circuited or damaged, the battery voltage is lower than 1V, which is also a common thing. If the emergency starting power supply is directly and simply connected with the automobile battery without detecting in advance and accurately eliminating the abnormality, the automobile cannot be started successfully, and the emergency starting power supply battery can be over-discharged, even permanently damaged. Similarly, when the automobile system has short circuit or the power loss caused by battery short circuit, and the general positive connection and reverse connection detection circuit cannot accurately identify, the polarity is identified by human eyes to judge whether the polarity is reverse connection, so that direct damage is easily caused.
When the automobile is not used for a long time or forgets to turn off the lamp and turn off the power, etc., the over-discharge of the automobile battery is easily caused, even the battery is emptied to be close to 0V. At the moment, a general emergency power supply detection circuit cannot normally identify, the detection scheme commonly used in the industry at present simply judges whether a clamp of an emergency starting power supply is reversely connected through optical coupling isolation sampling, the lowest working voltage of an optical coupling device is more than 1V, batteries below the reverse connection 1V are difficult to identify, and when severe environment conditions are met, human judgment errors are easily caused, so that ultra-low voltage detection becomes the difficult problem at present.
In summary, a more reliable and safe operation scheme for detecting the start rescue connection of the ultra-low voltage over-discharge automobile battery is needed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention has the advantages that the system for identifying the positive and reverse connection of the emergency starting power supply through the ultra-low voltage detection is provided, the method for identifying the positive and reverse connection of the emergency starting power supply through the ultra-low voltage detection is further provided, and the emergency starting power supply is further provided. In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
one aspect of the invention provides a system for detecting and identifying positive and negative connection of an emergency starting power supply under ultra-low voltage, which comprises a system working power supply module, a positive and negative sampling detection module, a clamp on-off information acquisition module and a system control and display module, wherein:
the system working power supply module supplies power to the positive and negative sampling detection module and the system control and display module;
the system control and display module judges whether the clamp is disconnected or connected according to the state information of the clamp;
the positive and negative sampling detection module detects a connection signal of the emergency starting power supply clamp, and when the clamp is connected, the system control and display module judges whether the clamp is in positive connection or reverse connection according to the connection signal of the clamp;
when the positive and negative sampling detection module cannot detect the connection signal of the clamp, the positive and negative sampling detection module increases the voltage of the clamp end and outputs a pre-detection signal, and the system control and display module judges that the clamp is in a short circuit or is connected with a battery according to the pre-detection signal.
Preferably, the system working power supply module comprises a first power supply module and a second power supply module, the first power supply module supplies power to the positive and negative sampling detection module, and the second power supply module supplies power to the system control and display module.
Preferably, the positive and negative sampling detection module includes a positive and negative connection information acquisition and conversion circuit and an ultra-low voltage pre-detection control and information acquisition circuit, wherein:
the positive and negative connection information acquisition and conversion circuit detects a connection signal of the clamp;
when the positive and negative connection information acquisition and conversion circuit cannot detect the connection signal of the clamp, the ultra-low voltage pre-detection control and information acquisition circuit increases the voltage of the clamp end and outputs the pre-detection signal.
Preferably, the positive and negative connection information acquisition and conversion circuit includes a differential amplifier and a reference source, an input end of the differential amplifier is connected to a clip end of the emergency starting power supply and the reference source, respectively, and the differential amplifier outputs a connection signal of the clip according to a voltage at an end of the clip and the reference source.
Preferably, the ultra-low voltage pre-detection control and information acquisition circuit comprises a switch circuit, a power supply voltage and a pre-detection signal output circuit, when the positive and negative sampling detection module cannot detect the connection signal of the clip, the system control and display module controls the switch circuit to transmit the power supply voltage to the clip end, the voltage of the clip end is increased, and the pre-detection signal output circuit outputs the pre-detection signal to the system control and display module according to the voltage of the clip end.
Preferably, the system display and control module comprises a system control module and a system display module, wherein:
the system control module judges whether the clamp of the emergency starting power supply is disconnected, positively connected, reversely connected, short-circuited or connected without a battery according to the connection signal of the clamp, the state information of the clamp and the pre-detection signal;
and the system display module is used for displaying the judgment result of the system control module.
Preferably, the system display module includes an external auxiliary circuit, and the external auxiliary circuit includes a display function and a backlight adjustment function.
Another aspect of the present invention provides a method for identifying positive and negative connections of an emergency starting power supply by ultra-low voltage detection, which is applied to a system for identifying positive and negative connections of an emergency starting power supply by ultra-low voltage detection as described above, and the method includes the following steps:
collecting state information of the emergency starting power supply clamp;
judging whether the clip is connected or not according to the state information of the clip:
detecting a connection signal of the clip when the clip is connected;
judging whether the clip is in positive connection or reverse connection according to the connection signal of the clip;
when the connection signal of the clamp cannot be detected, the voltage of the clamp end is increased;
outputting a pre-detection signal;
and judging that the clamp is in short circuit or is connected with a battery-free state according to the pre-detection signal.
Preferably, the acquiring the state information of the emergency starting power supply clamp comprises acquiring a positive clamp clamping signal and a negative clamp clamping signal of the emergency starting power supply.
Preferably, the determining whether the clip is connected or disconnected according to the state information of the clip includes:
when the positive clamp clamping signal is more than or equal to 1V and the negative clamp clamping signal is more than or equal to 1V, the clamps are connected, otherwise, the clamps are not connected.
Preferably, the judging that the clip is in a forward connection or a reverse connection according to the connection signal of the clip includes:
when the connection signal of the clamp is more than or equal to 0.05V, the clamp is in positive connection;
when the connection signal of the clamp is less than or equal to-0.05V, the clamp is reversely connected.
Preferably, the increasing the voltage of the clip terminal includes:
the voltage of the clip terminal is boosted by outputting a power supply voltage to the clip terminal.
Preferably, the judging that the clip is short-circuited or connected without a battery according to the pre-detection signal includes:
when the pre-detection signal is less than 0.7V, the clamp is in short circuit;
when the pre-detection signal is greater than or equal to 5V, the clamp is used for connecting a battery-free unit.
In a further aspect, the invention provides an emergency starting power supply, which comprises the system for detecting and identifying the positive and negative connection of the emergency starting power supply under the ultra-low voltage.
The system for detecting and identifying the positive and negative connection of the emergency starting power supply at the ultra-low voltage detects whether the clamp of the emergency starting power supply is connected or not through the clamp on-off information acquisition module; detecting whether the positive and negative polarities of the clamp connection are correct or not through a positive and negative sampling detection module; when the positive and negative connection sampling detection module cannot normally judge the connection signal of the clamp end, the voltage of the clamp end is increased, and then the clamp is judged to be short-circuited or connected with a battery. The invention can avoid the damage of the automobile and the emergency starting power supply caused by the ultra-low voltage or short circuit fault of the automobile battery, on one hand, the safety of the automobile is ensured, on the other hand, the service life of the emergency starting power supply is prolonged, and the reliability and the safety of the emergency starting power supply are greatly improved.
Drawings
The various aspects of the present invention will become more apparent to the reader after reading the detailed description of the invention with reference to the attached drawings. Wherein:
FIG. 1 is a functional block diagram of a system for detecting an ultra low voltage to identify a positive or negative connection of an emergency start power supply according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a system operating power supply module of a system for identifying positive and negative connections of an emergency start power supply according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a positive and negative sampling detection module of a system for detecting the presence of an ultra low voltage to identify positive and negative connections of an emergency power supply in accordance with an embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a clip on/off information collection module of a system for detecting and identifying positive and negative connections of an emergency starting power supply under ultra-low voltage in accordance with an embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of a system control and display module of the system for identifying positive and negative connections of an emergency start power supply with ultra low voltage detection in accordance with one embodiment of the present invention;
fig. 6 is a flowchart illustrating a method for detecting an ultra low voltage to identify a positive or negative connection of an emergency power source according to an embodiment of the present invention.
Description of reference numerals:
101: a system working power supply module; 102: a positive and negative sampling detection module; 103: the clip on-off information acquisition module; 104: and a system control and display module.
Detailed Description
In order to make the disclosure more complete and complete, reference is made to the appended drawings and the following detailed description of the invention. However, it should be understood by those skilled in the art that the examples provided below are not intended to limit the scope of the present invention. In addition, the drawings are only for illustrative purposes and are not drawn to scale.
Specific embodiments of various aspects of the present invention are described in further detail below with reference to the accompanying drawings.
The first embodiment is as follows:
the embodiment provides a system for detecting and identifying positive and negative connections of an emergency starting power supply at ultra-low voltage, referring to fig. 1, the system includes a system working power supply module 101, a positive and negative sampling detection module 102, a clip on-off information acquisition module 103, and a system control and display module 104, wherein:
the system working power supply module 101 is connected with the forward and reverse sampling detection module 102 and the system display and control module 104, and is used for supplying power to the forward and reverse sampling detection module 102 and the system control and display module 104;
the clip on-off information acquisition module 103 is connected to the system control and display module 104, and is configured to acquire state information of the emergency starting power supply clip in real time and send the state information of the clip to the system control and display module 104, and the system control and display module 104 determines that the clip is unconnected or connected according to the state information of the clip, specifically, the state information of the clip includes a positive clip clamping signal ClanpR-AD and a negative clip clamping signal ClanpB-AD;
the positive and negative sampling detection module 102 is connected to the system working power supply module 101 and the system control and display module 104, and is configured to detect a connection signal AD1-TEST of a clip of the emergency starting power supply, and when the clip is connected, the system control and display module 104 determines that the clip is in a positive connection or a negative connection through the connection signal AD1-TEST of the clip;
when the positive and negative sampling detection module 102 cannot detect the connection signal AD1-TEST of the clip, the positive and negative sampling detection module 102 increases the voltage of the clip terminal and outputs a pre-TEST signal AD2-TEST to the system control and display module 104, and the system control and display module 104 determines that the clip is short-circuited or connected with no battery according to the pre-TEST signal AD 2-TEST.
In this embodiment, the system operating power module 101 includes a first power module and a second power module, the first power module provides power to the positive and negative sampling detection module 102, and the second power module provides power to the system control and display module 104. Specifically, the first power module is a group of 12V to 7.0V integrated voltage and voltage stabilizing power modules, and the second power module is a group of 12V to 3.3V integrated voltage and voltage stabilizing power modules; specifically, referring to fig. 2, the battery voltage positive electrode BAT1-4+ passes through the diode D1 and then reaches the voltage stabilizing module composed of the IC3 and the IC4, wherein the capacitors C8, C5, C6, and C7 are input and output filter capacitors of the IC4, the capacitors C3 and C4 are input and output filter capacitors of the IC3, and the resistors R8 and R9 form a voltage dividing loop to increase the reference potential of the IC3, so that the IC3 outputs a stable 7.0V voltage.
In this embodiment, the positive and negative sampling detection module 102 includes a positive and negative connection information acquisition and conversion circuit and an ultra-low voltage pre-inspection control and information acquisition circuit, wherein:
the positive and negative connection information acquisition and conversion circuit is used for detecting a connection signal AD1-TEST of the clamp, processing the connection signal AD1-TEST of the clamp and outputting the processed signal to the system control and display module 104;
when the positive and negative connection information acquisition and conversion circuit cannot detect the connection signal AD1-TEST of the clamp, the ultra-low voltage pre-detection control and information acquisition circuit increases the voltage of the clamp end and outputs the pre-detection signal AD 2-TEST.
In this embodiment, the positive and negative connection information collecting and converting circuit includes a differential amplifier and a reference source, the input end of the differential amplifier is connected to the clip end of the emergency starting power supply and the reference source, respectively, and the differential amplifier outputs the connection signal AD1-TEST of the clip to the system control and display module 104 according to the voltage of the clip end and the reference source.
In this embodiment, the ultra-low voltage pre-test control and information acquisition circuit includes a switch circuit, a power voltage VCC and a pre-test signal output circuit, the switch circuit is respectively connected with the power supply voltage VCC, the clamp output end and the system control and display module 104, the pre-detection signal output circuit is connected with the clamp end, when the positive and negative sampling detection module cannot detect the connection signal AD1-TEST of the clamp, the system control and display module 104 sends a turn-on signal SHORT-CTRL to the switching circuit, the switching circuit transmits the power supply voltage VCC to the clip terminal according to the conduction signal SHORT-CTRL to increase the voltage of the clip terminal, the preview signal output circuit outputs the preview signal AD2-TEST to the system control and display module 104 according to the voltage of the clip terminal.
In this embodiment, the system display and control module 104 includes a system control module and a system display module, wherein:
the system control module judges whether the clamp of the emergency starting power supply is disconnected, positively connected, reversely connected, short-circuited or connected without a battery according to the connection signal AD1-TEST of the clamp, the state information of the clamp, such as the ClanpR-AD and the ClanpB-AD, and the pre-detection signal AD 2-TEST;
and the system display module is used for displaying the judgment result of the system control module.
In this embodiment, the system control module includes a main control module MCU, and the main control module MCU determines that the emergency starting power supply clip is unconnected, connected positively, connected negatively, short-circuited or connected without a battery according to the connection signal AD1-TEST of the clip, the status information of the clip, i.e., the information of ClanpR-AD and ClanpB-AD, and the pre-check signal AD 2-TEST.
In this embodiment, the system display module includes an external auxiliary circuit, and the external auxiliary circuit constitutes a switch operation control circuit for implementing a display function and a backlight adjustment function.
Specifically, referring to fig. 3, the clip end a 'b' of the emergency starting power supply is divided and stabilized by the current limiting resistors R3, R4, R2, R7, DZ1, and DZ2, and then respectively sent to the 2 nd pin and the 3 rd pin of the differential amplifier IC2, the reference source of 2.5V formed by R1, C2, C1, and IC1 provides a reference potential for the differential amplifier IC2, the 6 th pin of the differential amplifier IC2 sends the connection signal AD1-TEST of the clip to the 38 th pin of the main control module MCU through the voltage stabilizing filter formed by R5, R6, DZ3, and C9, specifically, when the connection signal AD1-TEST of the clip is greater than or equal to 0.05V, the main control module MCU determines that the clip is connected in the positive direction, and when the connection signal AD1-TEST of the clip is less than or equal to-0.05V, the main control module determines that the clip is connected in the reverse direction. When the connection signal AD1-TEST of the clip cannot be detected, namely the connection signal AD1-TEST of the clip is ultra-low voltage (AD 1-TEST is more than or equal to 0 and less than 0.05V or AD1-TEST is more than or equal to-0.05V and less than or equal to 0), the main control module MCU outputs a conducting signal SHORT-CTRL through a pin 42, the conducting signal SHORT-CTRL is a pulse high-low level, the pulse high-low level drives a triode Q2 after passing through R15 and R18, and after the triode Q2 is conducted, R12 and R13 generate partial voltage bias to enable the field effect transistor Q1 to enter a normal conducting state. The power supply voltage VCC passes through Q1, R10 and D2 and then reaches the clamp terminal OUT +, the ultra-low voltage pre-detection control and information acquisition circuit is composed of R14, R16 and C11, the pre-detection signal AD2-TEST is output to the main control module MCU, the main control module MCU judges that the clamp is in a short circuit or is connected with a non-battery according to the pre-detection signal AD2-TEST, specifically, when the short circuit exists at the clamp terminal, the pre-detection signal AD2-TEST is pulled down to be below 0.7V, and when the clamp is connected with the non-battery, the pre-detection signal is more than or equal to 5V.
Specifically, referring to fig. 4, the clip on-off information acquisition module 103 is composed of two groups of battery packs, a serial-parallel conversion switch, positive and negative output clip lines, a clip clamping and breaking trigger switch, and a photoelectric isolation acquisition circuit. The two groups of battery packs are BAT1 and BAT2, the negative electrode of the BAT1 is connected with the negative electrode clamp of the emergency starting power supply, and the switches SW1, SW2, SW3 and SW4 realize series connection or parallel connection of the BAT1 and the BAT 2. When the SW1, the SW2 and the SW3 are closed to work, the BAT1 and the BAT2 are in parallel output, and when the SW3 and the SW4 are closed to work, the BAT1 and the BAT2 are in series output. When the positive pole clamp of the emergency starting power supply is connected, the positive pole of the BAT2 battery pack returns to the negative pole end of the BAT2 battery pack through a diode D3 after passing through a D4 pin, an R31 pin, an R30 pin, a positive pole clamp switch 1 pin, an R24 pin and a 2 pin output pin of an IC5, and the IC5 sends a positive pole clamp clamping signal ClanpR-AD to the 14 pins of the main control module MCU after passing through an R21 pin, a 3 rd pin, a 4 th pin, an R20 pin and a C12 pin of the IC 5. When the negative pole clamp of the emergency starting power supply is connected, a VCC power supply returns to the negative pole end of the BAT1 battery pack after passing through a diode D5 to a negative pole clamp switch 2 through 1 pin input and 2 pin output of R33, R32 and IC6, and the IC6 sends a negative pole clamp clamping signal ClanpB-AD to a 16 pin of the MCU after passing through R23, a 3 rd pin, a 4 th pin, R22 and C13 of the IC 6.
Specifically, when the positive clamp clamping signal ClanpR-AD is 0V and the negative clamp clamping signal ClanpB-AD is 0V or the positive clamp clamping signal ClanpR-AD is 0V and the negative clamp clamping signal ClanpB-AD is not less than 1V or the positive clamp clamping signal ClanpR-AD is not less than 1V and the negative clamp clamping signal ClanpB-AD is 0V, the main control module MCU judges that the clamps are not connected, displays the judgment result through the system display module and informs a user of clamping the clamps; when the positive clamp clamping signal ClanpR-AD is more than or equal to 1V and the negative clamp clamping signal ClanpB-AD is more than or equal to 1V, the main control module MCU judges that the clamps are connected.
Specifically, referring to fig. 5, the system display and control module 104 is composed of a main control module MCU IC7 and an LCD display screen LCD1, wherein the 5 th and 6 th pins of the main control module MCU are externally connected with crystal oscillators Y1, C18, C19, the 7 th pin is externally connected with R35, and C16 to form a power-on reset circuit, and the other pins are used for AD information reading and instruction output control, so as to realize the work of whole system operation signal identification, diagnosis, result output, and the like, wherein:
the 14 th pin of the main control module MCU is used for receiving the positive clamp clamping signal ClanpR-AD;
a 16 th pin of the master control module MCU is used for receiving the negative clamp clamping signal ClanpB-AD;
a 42 th pin of the main control module MCU is used for sending the conducting signal SHORT-CTRL;
the 9 th pin of the main control module MCU is used for receiving the pre-detection signal AD 2-TEST;
and the 38 th pin of the master control module MCU is used for receiving a connection signal AD1-TEST of the clamp.
Specifically, when the ClanpR-AD is 0V and the ClanpB-AD is 0V or the ClanpR-AD is 0V and the ClanpB-AD is not less than 1V or the ClanpR-AD is not less than 1V and the ClanpB-AD is 0V, the main control module MCU judges that the clamp is not connected;
specifically, when the ClanpR-AD is more than or equal to 1V, the ClanpB-AD is more than or equal to 1V, and the AD1-TEST is more than or equal to 0.05V, the main control module MCU judges that the clamp is in positive connection;
specifically, when the ClanpR-AD is more than or equal to 1V, the ClanpB-AD is more than or equal to 1V, and the AD1-TEST is less than or equal to-0.05V, the main control module MCU judges that the clamp is in reverse connection;
specifically, when the SHORT-CTRL is ON and the AD2-TEST is less than 0.7V, the main control module MCU judges that the clip is in SHORT circuit;
specifically, when the SHORT-CTRL is ON and the AD2-TEST is more than or equal to 5V, the main control module MCU judges that the clip is connected with a battery-free state;
specifically, a switch operation control circuit is composed of R28, R29, Q3, R19, R25, R26 and R27, and the LCD screen operation and backlight brightness adjustment are achieved.
Example two:
the embodiment provides a method for identifying positive and negative connections of an emergency starting power supply by ultra-low voltage detection, which applies the system for identifying positive and negative connections of an emergency starting power supply by ultra-low voltage detection as described above, please refer to fig. 6, where the method includes the following steps:
s1: collecting state information of the emergency starting power supply clamp;
s2: judging whether the clip is connected or not according to the state information of the clip:
s3: detecting a connection signal AD1-TEST of the clip when the clip is connected:
s4: judging whether the clamp is in positive connection or reverse connection according to the connection signal AD1-TEST of the clamp;
s5: when the connection signal AD1-TEST of the clamp cannot be detected, namely the connection signal of the clamp is ultra-low voltage (0 is more than or equal to AD1-TEST is less than 0.05V or-0.05V is less than AD1-TEST is less than or equal to 0), the voltage of the clamp end is increased;
s6: outputting a pre-detection signal AD 2-TEST;
s7: and judging that the clamp is in short circuit or is connected with a battery according to the pre-detection signal AD 2-TEST.
In this embodiment, the acquiring of the state information of the emergency starting power supply clamp includes acquiring a positive clamp clamping signal ClanpR-AD and a negative clamp clamping signal ClanpB-AD of the emergency starting power supply.
In this embodiment, the determining that the clip is connected or disconnected according to the state information of the clip, i.e., the information of ClanpR-AD and ClanpB-AD S2 includes:
when the positive clamp clamping signal ClanpR-AD is more than or equal to 1V and the negative clamp clamping signal ClanpB-AD is more than or equal to 1V, the clamp is connected, otherwise, the clamp is not connected.
In this embodiment, the determining whether the clip is connected positively or negatively according to the connection signal AD1-TEST of the clip S4 includes:
when the connection signal AD1-TEST of the clamp is greater than or equal to 0.05V, the clamp is in positive connection;
when the connection signal AD1-TEST of the clamp is less than or equal to-0.05V, the clamp is reversely connected.
In this embodiment, the increasing the voltage of the clip terminal S5 includes:
the voltage at the clip terminal is boosted by outputting a supply voltage VCC to the clip terminal.
In this embodiment, the determining that the clip is shorted or connected to the battery-less state according to the pre-TEST signal AD2-TEST S7 includes:
when the pre-detection signal AD2-TEST is less than 0.7V, the clamp is in short circuit;
when the pre-detection signal AD2-TEST is greater than or equal to 5V, the clamp is connected with a battery-free unit.
Example three:
the embodiment provides an emergency starting power supply which comprises the system for detecting and identifying the positive and negative connection of the emergency starting power supply under the ultra-low voltage.
In this embodiment, the system includes a system working power supply module 101, a positive and negative sampling detection module 102, a clip on-off information acquisition module 103, and a system control and display module 104. The system working power supply module 101 is connected with the forward and reverse sampling detection module 102 and the system display and control module 104, and is used for supplying power to the forward and reverse sampling detection module 102 and the system control and display module 104; the positive and negative sampling detection module 102 is connected to the system control and display module 104, and is configured to detect a connection signal AD1-TEST of a clip of the emergency starting power supply, increase a voltage at a terminal of the clip and output a pre-TEST signal AD2-TEST when the connection signal AD1-TEST of the clip cannot be detected, and output a connection signal AD1-TEST of the clip and the pre-TEST signal AD2-TEST to the system control and display module 104; the clip on-off information acquisition module 103 is connected with the system control and display module 104 and is used for acquiring state information of the emergency starting power supply clips, i.e. ClanpR-AD and ClanpB-AD, and sending the state information of the clips, i.e. ClanpR-AD and ClanpB-AD, to the system control and display module 104; the system control and display module 104 is used for judging whether the clamps of the emergency starting power supply are disconnected, positively connected, reversely connected, shorted or connected without batteries according to the connection signals AD1-TEST of the clamps, the state information of the clamps, such as ClanpR-AD and ClanpB-AD, and the pre-detection signals AD 2-TEST.
The system for detecting and identifying the positive and negative connection of the emergency starting power supply at the ultra-low voltage detects whether the clamp of the emergency starting power supply is connected or not through the clamp on-off information acquisition module; detecting whether the positive and negative polarities of the clamp connection are correct or not through a positive and negative sampling detection module; when the positive and negative sampling detection module can not normally detect the connection signal of the clamp, the voltage of the clamp end is increased, and then the clamp is judged to be short-circuited or connected with a battery. The invention can avoid the damage of the automobile and the emergency starting power supply caused by the ultra-low voltage or short circuit fault of the automobile battery, on one hand, the safety of the automobile is ensured, on the other hand, the service life of the emergency starting power supply is prolonged, and the reliability and the safety of the emergency starting power supply are greatly improved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the invention and are not to be construed as limiting the embodiments of the present invention, and that various other changes and modifications may be made by those skilled in the art based on the above description. All documents mentioned in this application are incorporated by reference into this application as if each were individually incorporated by reference.

Claims (14)

1. The utility model provides a system that emergent start power of ultralow voltage detection discernment is just reversing, its characterized in that, the system includes system work power module, positive and negative sampling detection module, clip break-make information acquisition module and system control and display module, wherein:
the system working power supply module supplies power to the positive and negative sampling detection module and the system control and display module;
the system control and display module judges whether the clamp is disconnected or connected according to the state information of the clamp;
the positive and negative sampling detection module detects a connection signal of a clamp of the emergency starting power supply, and when the clamp is connected, the system control and display module judges whether the clamp is in positive connection or reverse connection according to the connection signal of the clamp;
when the positive and negative sampling detection module cannot detect the connection signal of the clamp, the positive and negative sampling detection module increases the voltage of the clamp end and outputs a pre-detection signal, and the system control and display module judges that the clamp is in a short circuit or is connected with a battery according to the pre-detection signal.
2. The system for detecting and identifying positive and negative connections of an emergency starting power supply according to claim 1, wherein the system operating power supply module comprises a first power supply module and a second power supply module, the first power supply module provides power to the positive and negative sampling detection module, and the second power supply module provides power to the system control and display module.
3. The system for identifying positive and negative connection of an emergency starting power supply through ultra-low voltage detection according to claim 1, wherein the positive and negative sampling detection module comprises a positive and negative connection information acquisition and conversion circuit and an ultra-low voltage pre-detection control and information acquisition circuit, wherein:
the positive and negative connection information acquisition and conversion circuit detects a connection signal of the clamp;
when the positive and negative connection information acquisition and conversion circuit cannot detect the connection signal of the clamp, the ultra-low voltage pre-detection control and information acquisition circuit increases the voltage of the clamp end and outputs the pre-detection signal.
4. The system for detecting and identifying the positive and negative connection of the emergency starting power supply according to the ultra low voltage of claim 3, wherein the positive and negative connection information acquisition and conversion circuit comprises a differential amplifier and a reference source, wherein the input end of the differential amplifier is respectively connected with the clamp end of the emergency starting power supply and the reference source, and the differential amplifier outputs the connection signal of the clamp according to the voltage of the clamp end and the reference source.
5. The system for detecting and identifying positive and negative connections of an emergency starting power supply according to claim 3, wherein the ultra-low voltage pre-test control and information acquisition circuit comprises a switch circuit, a power voltage and a pre-test signal output circuit, when the positive and negative sampling detection module cannot detect the connection signal of the clamp, the system control and display module controls the switch circuit to transmit the power voltage to the clamp end to increase the voltage of the clamp end, and the pre-test signal output circuit outputs the pre-test signal to the system control and display module according to the voltage of the clamp end.
6. The system for detecting and identifying positive and negative connections of emergency starting power supplies according to claim 1, wherein the system display and control module comprises a system control module and a system display module, wherein:
the system control module judges whether the clamp of the emergency starting power supply is disconnected, positively connected, reversely connected, short-circuited or connected without a battery according to the connection signal of the clamp, the state information of the clamp and the pre-detection signal;
and the system display module is used for displaying the judgment result of the system control module.
7. The system for detecting and identifying positive and negative connections of an emergency starting power supply according to claim 6, wherein the system display module comprises an external auxiliary circuit, and the external auxiliary circuit comprises a display function and a backlight adjustment function.
8. A method for identifying positive and negative connection of an emergency starting power supply by ultra-low voltage detection, which is applied to the system for identifying positive and negative connection of an emergency starting power supply by ultra-low voltage detection according to any one of claims 1 to 7, and is characterized by comprising the following steps:
collecting state information of the emergency starting power supply clamp;
judging whether the clip is connected or not according to the state information of the clip:
detecting a connection signal of the clip when the clip is connected;
judging whether the clip is in positive connection or reverse connection according to the connection signal of the clip;
when the connection signal of the clamp cannot be detected, the voltage of the clamp end is increased;
outputting a pre-detection signal;
and judging that the clamp is in short circuit or is connected with a battery-free state according to the pre-detection signal.
9. The method for detecting ultra low voltage according to claim 8, wherein the collecting the status information of the emergency starting power supply clamp comprises collecting a positive clamp clamping signal and a negative clamp clamping signal of the emergency starting power supply.
10. The method for detecting whether an emergency starting power supply is connected or disconnected according to the ultra low voltage detection of claim 9, wherein the determining whether the clip is connected or disconnected according to the state information of the clip comprises:
when the positive clamp clamping signal is more than or equal to 1V and the negative clamp clamping signal is more than or equal to 1V, the clamps are connected, otherwise, the clamps are not connected.
11. The method for detecting and identifying the positive and reverse connection of an emergency starting power supply according to the ultra low voltage of claim 8, wherein the determining whether the clip is in the positive connection or in the reverse connection according to the connection signal of the clip comprises:
when the connection signal of the clamp is more than or equal to 0.05V, the clamp is in positive connection;
when the connection signal of the clamp is less than or equal to-0.05V, the clamp is reversely connected.
12. The method for detecting extreme low voltage of claim 8 to identify positive or negative connection of emergency starting power supply, wherein said increasing the voltage of said clamp terminal comprises:
the voltage of the clip terminal is boosted by outputting a power supply voltage to the clip terminal.
13. The method for detecting whether an emergency starting power supply is connected in a reverse direction or a positive direction according to the ultra low voltage detection of claim 8, wherein the step of judging whether the clip is short-circuited or is connected with a battery-free state according to the pre-detection signal comprises the steps of:
when the pre-detection signal is less than 0.7V, the clamp is in short circuit;
when the pre-detection signal is greater than or equal to 5V, the clamp is used for connecting a battery-free unit.
14. An emergency starting power supply comprising a system for identifying a positive or negative connection of an emergency starting power supply according to any one of claims 1 to 7 when the ultra low voltage test is performed.
CN202110617216.2A 2021-06-03 2021-06-03 System and method for detecting and identifying positive and negative connection of emergency starting power supply under ultra-low voltage Active CN113433486B (en)

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