CN113346580A - Reverse charging control system and method for emergency starting power supply - Google Patents
Reverse charging control system and method for emergency starting power supply Download PDFInfo
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- CN113346580A CN113346580A CN202110592592.0A CN202110592592A CN113346580A CN 113346580 A CN113346580 A CN 113346580A CN 202110592592 A CN202110592592 A CN 202110592592A CN 113346580 A CN113346580 A CN 113346580A
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- 238000000034 method Methods 0.000 title claims description 25
- 238000001514 detection method Methods 0.000 claims abstract description 44
- 238000011217 control strategy Methods 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 description 21
- 230000000875 corresponding effect Effects 0.000 description 8
- 230000000630 rising effect Effects 0.000 description 3
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
- H02J7/00718—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current in response to charge current gradient
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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
- H02J7/00304—Overcurrent protection
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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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A voltage detection unit detects battery voltage of an emergency starting power supply, a current detection unit detects charging current of the emergency starting power supply, and a main control unit controls the charging current to rise in a stepped mode in at least two stages through an MOS control unit according to the battery voltage. The invention realizes the automatic control of the corresponding charging current according to different emergency starting power supply battery voltage stages by matching the software reverse charging control strategy of the main control unit with a hardware system. The invention avoids the damage of the emergency starting power supply caused by overlarge charging current by controlling the step rise of the charging current. The invention not only solves the problem that the emergency starting power supply can not be charged in time, but also better protects the battery of the emergency starting power supply, and has higher practical value.
Description
Technical Field
The invention belongs to the field of power supplies, and particularly relates to a reverse charging control system and method for an emergency starting power supply.
Background
Along with the improvement of people's standard of living, the car is also more and more popularized, can appear following safety problem in the car use, needs the help of emergent start power:
(1) the automobile is not used for a long time, so that the automobile battery is in power shortage;
(2) the service life of the automobile battery is too long and the automobile battery is not replaced in time;
(3) the cold weather causes the discharge capacity of the automobile battery to be reduced, and the like.
However, when the emergency starting power supply is frequently used, the electric quantity of the battery of the emergency starting power supply is insufficient, the emergency starting power supply cannot be charged in time in a severe environment, and the use of the emergency starting power supply is influenced, so that the emergency starting power supply also needs to be charged, and the emergency starting power supply is charged through an automobile (namely the automobile is reversely charged for the emergency starting power supply) in a more convenient mode.
Some emergent starting power supply on the market at present does not possess the function of anti-filling, and some have the function of anti-filling, and wherein the control scheme of the emergent starting power supply who has the function of anti-filling is: after the automobile is started successfully, the automobile system is used for directly charging the battery of the emergency starting power supply, the battery of the emergency starting power supply is connected with the automobile battery in parallel, the charging current is more than dozens of amperes, the battery of the emergency starting power supply is damaged by the large current when the battery of the emergency starting power supply is charged, the service life of the battery of the emergency starting power supply is influenced on one hand, and the charging and discharging capacity of the emergency starting power supply is influenced on the other hand.
Therefore, how to charge the emergency starting power supply by adopting a safe and convenient mode becomes a problem to be solved urgently.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an emergency starting power supply reverse charging control system. In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
one aspect of the present invention provides an emergency starting power supply reverse charging control system, including a main control unit, a voltage detection unit, a current detection unit and an MOS control unit, wherein:
the voltage detection unit detects the battery voltage of the emergency starting power supply;
the current detection unit detects the charging current of the emergency starting power supply;
when the automobile charges the emergency starting power supply, the main control unit controls the charging current to ascend in steps of at least two stages through the MOS control unit according to the battery voltage.
Preferably, the main control unit sets at least two voltage thresholds and a current threshold corresponding to the voltage thresholds, and controls the charging current to step up in at least two stages according to the voltage thresholds and the current thresholds, wherein:
when the voltage detection unit detects that the battery voltage is greater than an initial voltage value and less than a current voltage threshold value, the MOS control unit controls the charging current to be maintained at the current threshold value;
when the voltage detection unit detects that the battery voltage is greater than the voltage threshold of the last stage and less than the current voltage threshold, the MOS control unit controls the charging current to be maintained at the current voltage threshold.
Preferably, when the voltage detection unit detects that the battery voltage is close to the full-charge voltage of the emergency starting power supply or the charging time is overtime, the main control unit controls the automobile to stop charging the emergency starting power supply.
Preferably, the main control unit controls the charging current to be maintained at the current threshold value through a duty ratio for controlling MOS conduction of the MOS control unit.
Preferably, the main control unit identifies that the clip of the emergency starting power supply is in positive connection or reverse connection through the voltage detection unit.
Preferably, the control system further comprises an audible alarm unit, and when the emergency-started clamp is reversely connected, the audible alarm unit gives a reverse connection alarm.
Preferably, the control system further comprises a USB unit and a DC unit.
Another aspect of the present invention provides an emergency starting power supply reverse charging control method, which is applied to the emergency starting power supply reverse charging control system, and includes the following steps:
connecting the clamp of the emergency starting power supply with an automobile battery;
judging whether the clips are in positive connection or reverse connection;
when the clamp is connected positively, recording an initial voltage value of the battery voltage of the emergency starting power supply;
the emergency starting system supplies power to the automobile;
starting the automobile;
when the voltage of the battery rises and is larger than the initial voltage value, the automobile charges the emergency starting power supply;
and controlling the charging current of the emergency starting power supply to rise in a step mode in at least two stages according to the battery voltage.
Preferably, the step-up of the charging current of the emergency starting power supply according to the battery voltage is controlled in at least two stages, including:
setting at least two voltage thresholds and a current threshold corresponding to the voltage thresholds;
when the battery voltage is larger than the initial voltage value and smaller than a current voltage threshold value, controlling the charging current to be maintained at a current threshold value;
and when the battery voltage is greater than the voltage threshold of the last stage and less than the current voltage threshold, controlling the charging current to be maintained at the current voltage threshold.
Preferably, the control method includes:
and when the battery voltage is close to the full charge voltage of the emergency starting power supply or the charging is overtime, stopping charging the emergency starting power supply.
Preferably, the controlling the charging current to be maintained at a present current threshold includes:
and controlling the charging current to be maintained at the current threshold value by controlling the duty ratio of the conduction of the MOS.
Preferably, the control method includes:
and when the clamp started in emergency is reversely connected, a reverse connection alarm is sent out.
In a further aspect of the invention, an emergency starting power supply is provided, which comprises the emergency starting power supply reverse charging control system.
The invention relates to an emergency starting power supply reverse charging control system and method. The invention realizes the automatic control of the corresponding charging current according to different emergency starting power supply battery voltage stages by matching the software reverse charging control strategy of the main control unit with a hardware system. The invention avoids the damage of the emergency starting power supply caused by overlarge charging current by controlling the step rise of the charging current. The invention not only solves the problem that the emergency starting power supply can not be charged in time, but also better protects the battery of the emergency starting power supply, and has higher practical value.
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 the content of the first and second substances,
fig. 1 is a system configuration diagram of an emergency starting power supply reverse charging control system according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for controlling reverse charging of an emergency starting power supply according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating an emergency starting power supply reverse charging control method according to another embodiment of the present invention.
Description of reference numerals:
1: a main control unit; 2: a voltage detection unit; 3: a current detection unit; 4: a MOS control unit; 5: a key unit; 6: a sound alarm unit; 7: a USB unit; 8: a DC unit.
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:
this embodiment provides an emergency starting power supply control system that charges conversely, please refer to fig. 1, the control system includes main control unit 1, voltage detection unit 2, current detection unit 3 and MOS control unit 4, main control unit 1 respectively with voltage detection unit 2, current detection unit 3 and MOS control unit 4 are connected, wherein:
the voltage detection unit 2 detects the battery voltage of the emergency starting power supply and sends the battery voltage to the main control unit 1; specifically, the voltage detection unit 2 detects in real time whether the clip of the emergency starting power supply is connected to the battery, and changes of terminal voltages of the positive and negative clips, so as to provide voltage information for charging of the emergency starting power supply.
The current detection unit 3 detects the charging current of the emergency starting power supply and sends the charging current to the main control unit 1;
when the automobile charges the emergency starting power supply, the main control unit 1 controls the charging current to ascend in steps of at least two stages through the MOS control unit 4 according to the battery voltage.
In this embodiment, the main control unit 1 sets at least two voltage thresholds and a current threshold corresponding to the voltage thresholds, and controls the charging current to step up in at least two stages according to the voltage thresholds and the current thresholds, where:
when the voltage detection unit 2 detects that the battery voltage is greater than an initial voltage value and less than a current voltage threshold, the MOS control unit 4 controls the charging current to be maintained at a current threshold;
when the voltage detection unit 2 detects that the battery voltage is greater than the voltage threshold of the last stage and less than the current voltage threshold, the MOS control unit 4 controls the charging current to be maintained at the current voltage threshold.
In this embodiment, when the voltage detection unit 2 detects that the battery voltage is close to the full-charge voltage or the charging time exceeds, the main control unit 1 controls the vehicle to stop charging the emergency starting power supply. Specifically, the stopping condition should meet the requirement that the emergency starting power supply battery reaches full charge voltage or the charging time reaches the set time, the general charging time is set to 10min, and the emergency starting power supply is stopped to be charged after the charging time is over.
In this embodiment, the main control unit 1 controls the charging current to be maintained at the current threshold through a duty ratio controlling MOS conduction of the MOS control unit 4.
In this embodiment, the control system further includes a key unit 5, where the key unit 5 is connected to the main control unit 1, and specifically, the key unit 5 is mainly responsible for detecting user operations and executing corresponding actions according to a key function defined by software.
In particular, the voltage threshold comprises a first voltage threshold V1A second voltage threshold V2… … nth voltage threshold VnThe current threshold comprises an initial current threshold A0A first current threshold A1… … nth current threshold An。
Specifically, when the voltage detection unit 2 detects that the battery voltage is rising, it is larger than the initial voltage value V of the battery voltage0And is less than the first voltage threshold V1The main control unit 1 controls the MOS conduction duty ratio of the MOS control unit 4, the charging current is detected by the current detection unit 3, and the charging current is controlled to be maintained at an initial current threshold A by the MOS conduction duty ratio0The condition for exiting charging at this time is charging timeout. In particular, if the emergency starterWhen the power supply is fully charged or the charging is overtime, the system automatically quits; if in the charging process, the user can quit by pressing the key unit 5 at any time.
Specifically, when the voltage detection unit 2 detects that the battery voltage is rising, the battery voltage is greater than a first voltage threshold V1And is less than the second voltage threshold V2The main control unit 1 controls the MOS conduction duty ratio of the MOS control unit 4, the charging current is detected by the current detection unit 3, and the charging current is controlled to be maintained at a first current threshold A by the MOS conduction duty ratio1The condition for exiting charging at this time is charging timeout.
Repeating the above boosting process, when the voltage detecting unit 2 detects that the battery voltage is rising, the battery voltage is greater than the nth voltage threshold value VnThe main control unit 1 controls the MOS conduction duty ratio of the MOS control unit 4, the charging current is detected by the current detection unit 3, and the charging current is controlled to be maintained at the nth current threshold A by the MOS conduction duty rationAt this time, the nth voltage threshold VnAnd approaching the full-charge voltage of the battery of the emergency starting power supply, wherein the condition of exiting charging is full-charge cut-off or charging overtime.
In this embodiment, the main control unit 1 identifies that the clip of the emergency starting power supply is connected positively or negatively through the voltage detection unit 2.
In this embodiment, the control system further includes an audio alarm unit 6, the audio alarm unit 6 is connected to the main control unit 1, and when the voltage detection unit 2 detects that the clip of the emergency starting power supply is reversely connected, the main control unit 1 sends reverse connection information to the main control unit 1, and the main control unit 1 sends reverse connection alarm through the audio alarm unit 6 after receiving the reverse connection information.
In this embodiment, the control system further includes a USB unit 7 and a DC unit 8, specifically, the USB unit 7 is connected to the main control unit 1 to implement USB output control; and the DC unit 8 is connected with the main control unit 1 to realize DC output control.
Example two:
the embodiment provides a method for controlling reverse charging of an emergency starting power supply, which is applied to the system for controlling reverse charging of an emergency starting power supply, please refer to fig. 2, and the method includes the following steps:
s1: connecting the clamp of the emergency starting power supply with an automobile battery;
s2: judging whether the clips are in positive connection or reverse connection;
s31: when the clamp is connected positively, recording the initial voltage value V of the battery voltage of the emergency starting power supply0；
S4: the emergency starting system supplies power to the automobile;
s5: starting the automobile;
s6: when the battery voltage rises and is greater than the initial voltage value V0When the emergency starting power supply is started, the automobile charges the emergency starting power supply;
s7: and controlling the charging current of the emergency starting power supply to rise in a step mode in at least two stages according to the battery voltage.
In this embodiment, the step up S7 of controlling the charging current of the emergency starting power supply according to the battery voltage includes:
setting at least two voltage thresholds and a current threshold corresponding to the voltage thresholds;
when the battery voltage is greater than the initial voltage value V0When the current value is smaller than the current voltage threshold value, controlling the charging current to be maintained at the current threshold value;
and when the battery voltage is greater than the voltage threshold of the last stage and less than the current voltage threshold, controlling the charging current to be maintained at the current voltage threshold.
In this embodiment, the control method includes:
s8: and when the battery voltage is close to the full charge voltage of the emergency starting power supply or the charging is overtime, stopping charging the emergency starting power supply. Specifically, the stopping condition should meet the requirement that the emergency starting power supply battery reaches full charge voltage or the charging time reaches the set time, the general charging time is set to 10min, and the emergency starting power supply is stopped to be charged after the charging time is over.
In this embodiment, the controlling the charging current to be maintained at the current threshold includes:
and controlling the charging current to be maintained at the current threshold value by controlling the duty ratio of the conduction of the MOS.
In this embodiment, the control method includes:
s32: and when the clamp started in emergency is reversely connected, a reverse connection alarm is sent out.
Example three:
the working process of the emergency starting power supply reverse charging control method is further explained in this embodiment, so as to further explain the technical scheme of the invention.
In this embodiment, the voltage threshold includes a first voltage threshold V1A second voltage threshold V2And a third voltage threshold V3The current threshold comprises an initial current threshold A0A first current threshold A1A second current threshold A2And a third current threshold A3。
Referring to fig. 3, the method for controlling reverse charging of an emergency starting power supply according to this embodiment includes the following specific steps:
the method comprises the following steps: when the emergency starting power supply is used, the positive and negative clamps of the emergency starting power supply are connected with the positive and negative electrodes of the automobile battery, the voltage of the automobile battery can wake up the system at the moment, the voltage detection unit 2 can identify the voltage of the emergency starting power supply battery, the main control unit 1 can store the voltage value of the emergency starting power supply battery into FLASH, and the voltage is recorded as V0，V0Representing the initial voltage value of the emergency starting power supply before working. When the voltage of the automobile battery exceeds the use range specified by the emergency starting power supply, the system can send out an alarm prompt through the sound alarm unit 6.
Step two: when the positive and negative clamps of the emergency starting power supply are connected with the positive and negative electrodes of the automobile battery without errors, a user presses a key through the key unit 5 to start the emergency starting power supply, and the MOS control unit 4 works at the moment to enable the battery in the emergency starting power supply to be connected with the automobile battery in parallel to supply power for an automobile system. If the user connects the positive and negative poles of the clamp and the positive and negative poles of the automobile battery reversely, the system can automatically identify and send out reverse connection alarm through the sound alarm unit 6.
Step three: and after the second step is finished, the user can start the automobile. After the starting is successful, the automobile system can charge the battery of the emergency starting power supply, and the battery voltage of the emergency starting power supply can be greater than the initial voltage value V0At the moment, the system automatically enters a reverse charging control function;
step four: once the system detects that the third step is achieved, the conduction duty ratio of the MOS control unit 4 is controlled according to the battery voltage of the emergency starting power supply detected in real time, and different charging current control is achieved. When the battery voltage of the emergency starting power supply is less than the first voltage threshold value V1The system controls the duty ratio of MOS conduction, and then detects the charging current to maintain the charging current at the initial current threshold A0. The condition for exiting the back-charge function at this time is a charge timeout.
Step five: when the voltage of the emergency starting power supply battery is greater than the first voltage threshold value V1Less than the second voltage threshold V2(V1<V2) The system controls the duty ratio of MOS conduction, and then detects the charging current to maintain the charging current at the first current threshold A1. The condition for exiting the back-charge function at this time is a charge timeout.
Step six: when the voltage of the emergency starting power supply battery is greater than the second voltage threshold value V2And is less than the third voltage threshold V3(V2<V3) The system controls the duty ratio of the MOS to be conducted, and then detects the charging current to maintain the charging current at the second current threshold A2. The condition for exiting the back-charge function at this time is a charge timeout.
Step seven: when the voltage of the emergency starting power supply battery is greater than the third voltage threshold value V3The system will control MOS to conductAnd then detecting the charging current to maintain the charging current at the third current threshold a3. Because of the third voltage threshold V3The condition for exiting the reverse charging function at this time is a charge timeout and a full shutdown, since the full voltage of the battery of the emergency starting power supply is approaching.
Example four:
the embodiment provides an emergency starting power supply which comprises the emergency starting power supply reverse charging control system.
In this embodiment, the control system includes a main control unit 1, a voltage detection unit 2, a current detection unit 3, and an MOS control unit 4, where the main control unit 1 is connected to the voltage detection unit 2, the current detection unit 3, and the MOS control unit 4, respectively. The voltage detection unit 2 detects the battery voltage of the emergency starting power supply; the current detection unit 3 detects the charging current of the emergency starting power supply; when the automobile charges the emergency starting power supply, the main control unit 1 controls the charging current to ascend in steps of at least two stages through the MOS control unit 4 according to the battery voltage.
In this embodiment, the emergency starting power supply realizes the automatic control of the corresponding charging current according to different voltage phases of the battery of the emergency starting power supply through the reverse charging control system of the emergency starting power supply, and avoids the damage of the emergency starting power supply caused by the overlarge charging current.
The invention relates to an emergency starting power supply reverse charging control system and method. The invention realizes the automatic control of the corresponding charging current according to different emergency starting power supply battery voltage stages by matching the software reverse charging control strategy of the main control unit with a hardware system. The invention avoids the damage of the emergency starting power supply caused by overlarge charging current by controlling the step rise of the charging current. The invention not only solves the problem that the emergency starting power supply can not be charged in time, but also better protects the battery of the emergency starting power supply, and has higher practical value.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of 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 (13)
1. The utility model provides an emergent start power anti-control system that charges which characterized in that, control system includes main control unit, voltage detection unit, current detection unit, MOS the control unit, wherein:
the voltage detection unit detects the battery voltage of the emergency starting power supply;
the current detection unit detects the charging current of the emergency starting power supply;
when the automobile charges the emergency starting power supply, the main control unit controls the charging current to ascend in steps of at least two stages through the MOS control unit according to the battery voltage.
2. The emergency starting power supply reverse charging control system according to claim 1, wherein the main control unit sets at least two voltage thresholds and a current threshold corresponding to the voltage thresholds, and controls the charging current to step up in at least two stages according to the voltage thresholds and the current thresholds, wherein:
when the voltage detection unit detects that the battery voltage is greater than an initial voltage value and less than a current voltage threshold value, the MOS control unit controls the charging current to be maintained at the current threshold value;
when the voltage detection unit detects that the battery voltage is greater than a last-stage voltage threshold and less than a current voltage threshold, the MOS control unit controls the charging current to be maintained at a current threshold.
3. The emergency starting power supply reverse charging control system according to claim 2, wherein when the voltage detection unit detects that the battery voltage is close to a full voltage of the emergency starting power supply or the charging time is over, the main control unit controls the automobile to stop charging the emergency starting power supply.
4. The emergency starting power supply reverse charging control system according to claim 2, wherein the main control unit controls the charging current to be maintained at the current threshold value through a duty ratio for controlling MOS conduction of the MOS control unit.
5. The emergency starting power supply reverse charging control system according to claim 1, wherein the main control unit identifies that the clamp of the emergency starting power supply is connected positively or reversely through the voltage detection unit.
6. The emergency starting power supply reverse charging control system according to claim 5, further comprising an audible alarm unit, wherein when the clamp of the emergency starting power supply is reversely connected, the audible alarm unit gives a reverse connection alarm.
7. The emergency starting power supply back-charging control system of claim 1, wherein the control system further comprises a USB unit and a DC unit.
8. An emergency starting power supply reverse charging control method applied to the emergency starting power supply reverse charging control system according to any one of claims 1 to 7, characterized by comprising the following steps:
connecting the clamp of the emergency starting power supply with an automobile battery;
judging whether the clips are in positive connection or reverse connection;
when the clamp is connected positively, recording an initial voltage value of the battery voltage of the emergency starting power supply;
the emergency starting system supplies power to the automobile;
starting the automobile;
when the voltage of the battery rises and is larger than the initial voltage value, the automobile charges the emergency starting power supply;
and controlling the charging current of the emergency starting power supply to rise in a step mode in at least two stages according to the battery voltage.
9. The method for controlling reverse charging of an emergency starting power supply according to claim 8, wherein the step-up of the charging current of the emergency starting power supply according to the battery voltage is controlled in at least two stages, and comprises:
setting at least two voltage thresholds and a current threshold corresponding to the voltage thresholds;
when the battery voltage is larger than the initial voltage value and smaller than a current voltage threshold value, controlling the charging current to be maintained at a current threshold value;
and when the battery voltage is greater than the last-stage voltage threshold and less than the current voltage threshold, controlling the charging current to be maintained at the current threshold.
10. The method for controlling the reverse charging of the emergency starting power supply according to claim 8, comprising:
and when the battery voltage is close to the full charge voltage of the emergency starting power supply or the charging is overtime, stopping charging the emergency starting power supply.
11. The emergency starting power supply reverse charging control method according to claim 9, wherein the controlling the charging current to be maintained at a current threshold value comprises:
and controlling the charging current to be maintained at the current threshold value by controlling the duty ratio of the conduction of the MOS.
12. The method for controlling the reverse charging of the emergency starting power supply according to claim 8, comprising:
and when the clamp is reversely connected, a reverse connection alarm is sent out.
13. An emergency starting power supply comprising an emergency starting power supply back-charging control system as claimed in any one of claims 1 to 7.
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Application publication date: 20210903 |