CN106786895B - Battery clamp safety management system of automobile emergency starting power supply - Google Patents
Battery clamp safety management system of automobile emergency starting power supply Download PDFInfo
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- CN106786895B CN106786895B CN201611216284.3A CN201611216284A CN106786895B CN 106786895 B CN106786895 B CN 106786895B CN 201611216284 A CN201611216284 A CN 201611216284A CN 106786895 B CN106786895 B CN 106786895B
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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
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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
- H02J7/00302—Overcharge protection
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Abstract
The invention discloses a battery clamp safety management system of an automobile emergency starting power supply, which comprises: the battery clamp system comprises a battery clamp state identification unit and a controllable switch unit, wherein the battery clamp state identification unit identifies the current state of a battery clamp and feeds the current state back to the controller, and the controllable switch unit receives a control signal of the controller and closes or opens a circuit. Through the mode, the battery clamp safety management system for the automobile emergency starting power supply provided by the invention can identify the dangerous conditions of negative and positive electrode clamp reverse, short circuit, high voltage, low voltage, no battery and the like of the battery clamp of the emergency starting power supply in a quick and accurate mode, has a secondary protection function, and can ensure the safe application of products even if a user operates improperly.
Description
Technical Field
The invention relates to the field of automobile emergency starting power supplies, in particular to a battery clamp safety management system of an automobile emergency starting power supply.
Background
An automobile emergency starting power supply is a device which can start an automobile when the battery of the automobile is insufficient in power or the automobile cannot be started due to other reasons (such as low temperature). When the automobile emergency starting power supply is used, dangerous conditions such as reverse clamping of the anode and the cathode of the battery clamp, short circuit, high voltage clamping, low voltage clamping, no battery of the automobile and the like exist, and serious safety accidents can be caused by improper treatment.
The management of the existing automobile emergency starting power supply battery clamps in the market is single, and the automobile emergency starting power supply battery clamps only have the processing function of the single (such as anti-clamping) dangerous condition, are not comprehensive enough in protection of users and products, and have great potential safety hazards. In particular, in recent years, the popularization of a power lithium battery on an automobile emergency starting power supply has raised requirements on safety, the existing battery clamp management system cannot meet the requirements, and safety accidents such as battery bulge, ignition and explosion frequently occur, so that improvement is needed.
Disclosure of Invention
The invention mainly solves the technical problem of providing a battery clamp safety management system of an automobile emergency starting power supply, which is used for enhancing the safety management of battery clamps and treating the dangerous situations of reverse clamping, short circuit, high voltage clamping, low voltage clamping, no battery of an automobile and the like.
In order to solve the technical problems, the invention adopts a technical scheme that: the utility model provides a battery clamp safety control system of car emergency starting power supply, include: the battery clamp system comprises a battery clamp state identification unit and a controllable switch unit, wherein the battery clamp state identification unit identifies the current state of a battery clamp and feeds the current state back to the controller, and the controllable switch unit receives a control signal of the controller and closes or opens a circuit.
In a preferred embodiment of the present invention, the battery clamp status identifying unit includes:
a small current test loop formed by serially connecting a resistor R3 and a diode D2: the resistor R3 is connected to the EN_Curr_S end of the controller, the diode D2 is connected to the positive electrode Clamp+ of the battery Clamp, and when the EN_Curr_S end of the controller outputs a high level, current is output to the positive electrode clamp+ of the battery Clamp along the direction of the diode D2, so that whether the battery Clamp is empty or not is judged;
and a high-current test loop formed by serially connecting a resistor R2, a MOS tube Q1, a resistor R1 and a diode D1: the resistor R2 is connected to the EN_Curr_L end of the controller and is used for receiving a controller driving signal and opening or closing the MOS tube Q1; the source electrode of the MOS tube Q1 is connected with the positive electrode BAT+ of the battery pack, the drain electrode of the MOS tube Q1 is connected with the resistor R1, and the resistor R1 is connected to the positive electrode clamp+ of the battery Clamp through the diode D1, when the output low level of the EN_Curr_L end of the controller is output, the MOS tube Q1 is opened, and the positive electrode of the battery pack outputs a larger current to the positive electrode of the battery Clamp for identifying whether the state of the battery Clamp is a positive-negative short circuit or a battery-free automobile;
the device comprises a reverse voltage testing loop, a controller IN_Clamp end, a voltage stabilizing circuit and a voltage stabilizing circuit, wherein the reverse voltage testing loop is formed by connecting an optical coupler U1 and a resistor R4 IN series and used for identifying the connection and the reverse of the positive electrode of a battery Clamp, the resistor R4 is connected to the positive electrode clamp+ of the battery Clamp, the optical coupler U1 is connected to the controller IN_clamp end, and when the battery Clamp is subjected to reverse voltage, the optical coupler U1 is conducted, and the controller IN_clamp receives a low-level signal;
the device comprises a diode D3, a resistor R10, a resistor R7 and a triode Q2, wherein the diode D3, the resistor R10 and the resistor R7 are sequentially connected IN series between a positive electrode clamp+ of the battery Clamp and a negative electrode Clamp-of the battery Clamp, a base electrode of the triode Q2 is connected between the resistor R10 and the resistor R7, a collector electrode of the triode Q2 is connected with an optical coupler U1, an emitter electrode of the triode Q2 is connected with a negative electrode Clamp-of the battery Clamp, when the battery Clamp clamps positive voltage, the triode Q2 is conducted, and a controller IN_clamp receives a low-level signal;
the voltage division sampling circuit is composed of a resistor R5, a resistor R6, a resistor R8 and a diode D4, wherein the resistor R6 and the resistor R5 are connected in series between a controller AD_Clamp end and a battery Clamp anode clamp+, the resistor R8 is connected between the controller AD_clamp end and a battery Clamp cathode Clamp-, the anode of the diode D4 is connected with the battery Clamp cathode Clamp-, the cathode of the diode D4 is connected between the resistor R6 and the resistor R5, and the controller AD_clamp end acquires specific voltage values to further judge the state of the battery Clamp.
In a preferred embodiment of the present invention, the controllable switching unit comprises:
the direct-current contactor JK1, one end of the direct-current contactor JK1 is connected with the battery pack positive electrode BAT+, and the other end is connected with the battery Clamp positive electrode clamp+ for connecting or disconnecting the battery pack positive electrode and the battery Clamp positive electrode;
the resistor R9 and the MOS tube Q3 are connected in series to form a high-end driving circuit, the resistor R9 is connected with the EN_RL1 end controlled by the controller, the source electrode of the MOS tube Q3 is connected with the positive electrode BAT+ of the battery pack, and the drain electrode is connected with one end of the JK1 coil;
the resistor R11 and the MOS tube Q5 are connected in series to form a low-end driving circuit, the resistor R11 is connected and controlled by the EN_RL2 end of the controller, the source electrode of the MOS tube Q5 is connected with the negative electrode BAT-of the battery pack, the drain electrode is connected with the other end of the JK1 coil, when the controller drives the MOS tube Q3 and the MOS tube Q5 to be opened, the JK1 is closed, and the positive electrode of the battery pack is communicated with the positive electrode of the battery clamp;
diode D6, positive pole connects storage battery Clamp positive pole clamp+, drain electrode that MOS pipe Q3 is connected to the negative pole for maintain JK 1's closed state: when the battery pack anode and the battery clamp anode are communicated, the Q3 is disconnected, and the battery clamp anode has voltage, and JK1 can be kept in a closed state continuously through the diode D6;
the temperature control switch RT1, normally open type temperature controller, place it inside the group battery, one end is connected between resistance R11 and MOS pipe Q5, and the other end is connected with group battery negative pole BAT-, in case the group battery appears that the temperature is too high, RT1 can switch to the closed state immediately to turn off Q5, JK1 also breaks off thereupon, avoids the group battery high temperature to discharge, increases the security level.
In a preferred embodiment of the present invention, the controllable switch unit further includes a diode D5, an anode of the diode D5 is connected to a drain of the MOS transistor Q5, and a cathode of the diode D5 is connected to a drain of the MOS transistor Q3, for freewheeling when JK1 is turned off.
IN a preferred embodiment of the present invention, the end of RT1 is further connected to the end of the controller in_tds, and the switch information is fed back to the end of the controller in_tds, so as to inform the controller of the battery pack over-temperature information, and the controller performs further actions.
In a preferred embodiment of the present invention, the battery clamp status identifying unit defaults to: q1 is disconnected, EN_Curr_S outputs a low level, and IN_Clamp is pulled up to a high level;
step 1, judging the level state of the IN_Clamp, and if the level state is high, executing the step 2; if the voltage is at a low level, judging the state of the battery Clamp through the value of the AD_Clamp port:
if the value of AD_Clamp is less than or equal to 0, judging the clamping state of the storage battery as clamping reverse voltage;
if the value of a0< AD_Clamp is less than or equal to a1, judging that the state of the battery Clamp is a Clamp forward low voltage;
if the value of a1< AD_Clamp is less than or equal to a2, judging that the state of the battery Clamp is a proper forward voltage;
if a2< AD_Clamp value, determining that the battery Clamp state is a Clamp forward high voltage, wherein a0, a1 and a2 are preset values;
In a preferred embodiment of the present invention, under the default condition of the controllable switch unit, JK1 is disconnected, and the battery clamp has no power output;
when JK1 meets the closing condition, the controller controls Q3 and Q5 to be opened, so that one end of the JK1 coil is connected to the positive pole VBT+ of the battery, the other end of the JK1 coil is connected to the negative pole VBT-, and therefore the JK1 contact is closed, and the positive pole clamp+ of the battery Clamp is connected to the positive pole VBT+;
the battery Clamp anode clamp+ is connected to one end of the JK1 coil through a diode D6, and at the moment, Q3 is disconnected, and the JK1 is kept in a closed state;
when the battery Clamp is short-circuited or over-current, the positive pole clamp+ voltage of the battery Clamp is pulled down, and once the voltage is lower than the maintaining voltage of JK1, the JK1 is disconnected, so that safety accidents are avoided, and the primary protection of battery discharge is formed;
in the state that the JK1 is closed, the temperature control switch RT1 is in an open state by default, and if the temperature control switch RT1 detects that the battery temperature is too high, the RT1 is closed, so that the Q5 is turned off; when Q5 is disconnected, JK1 is also disconnected, the power output of the battery clamp is closed, the battery is prevented from discharging at high temperature, and the secondary discharge protection of the battery is formed.
The beneficial effects of the invention are as follows: the battery clamp safety management system for the automobile emergency starting power supply provided by the invention can identify all conditions possibly encountered by the battery clamp of the emergency starting power supply in a quick and accurate manner, has a secondary protection function, and can ensure the safe application of products even if a user operates improperly.
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
FIG. 1 is a schematic diagram of a battery clamp safety management system for an emergency starting power supply of an automobile according to a preferred embodiment of the invention;
FIG. 2 is a circuit diagram of the battery clamp status recognition unit of FIG. 1;
fig. 3 is a circuit diagram of the controllable switch unit of fig. 1.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 3, an embodiment of the present invention includes:
a battery clamp safety management system for an automotive emergency starting power supply, as shown in fig. 1, comprising: the battery clamp system comprises a battery clamp state identification unit and a controllable switch unit, wherein the battery clamp state identification unit identifies the current state of a battery clamp and feeds the current state back to the controller, and the controllable switch unit receives a control signal of the controller and closes or opens a circuit.
As shown in fig. 2, the battery clamp state identifying unit includes:
a small current test loop formed by serially connecting a resistor R3 and a diode D2: the resistor R3 is connected to the EN_Curr_S end of the controller, the diode D2 is connected to the positive electrode Clamp+ of the battery Clamp, and when the EN_Curr_S end of the controller outputs a high level, current is output to the positive electrode clamp+ of the battery Clamp along the direction of the diode D2, so that whether the battery Clamp is empty or not is judged;
and a high-current test loop formed by serially connecting a resistor R2, a MOS tube Q1, a resistor R1 and a diode D1: the resistor R2 is connected to the EN_Curr_L end of the controller and is used for receiving a controller driving signal and opening or closing the MOS tube Q1; the source electrode of the MOS tube Q1 is connected with the positive electrode BAT+ of the battery pack, the drain electrode of the MOS tube Q1 is connected with the resistor R1, and the resistor R1 is connected to the positive electrode clamp+ of the battery Clamp through the diode D1, when the output low level of the EN_Curr_L end of the controller is output, the MOS tube Q1 is opened, and the positive electrode of the battery pack outputs a larger current to the positive electrode of the battery Clamp for identifying whether the state of the battery Clamp is a positive-negative short circuit or a battery-free automobile;
the device comprises a reverse voltage testing loop, a controller IN_Clamp end, a voltage stabilizing circuit and a voltage stabilizing circuit, wherein the reverse voltage testing loop is formed by connecting an optical coupler U1 and a resistor R4 IN series and used for identifying the connection and the reverse of the positive electrode of a battery Clamp, the resistor R4 is connected to the positive electrode clamp+ of the battery Clamp, the optical coupler U1 is connected to the controller IN_clamp end, and when the battery Clamp is subjected to reverse voltage, the optical coupler U1 is conducted, and the controller IN_clamp receives a low-level signal;
the device comprises a diode D3, a resistor R10, a resistor R7 and a triode Q2, wherein the diode D3, the resistor R10 and the resistor R7 are sequentially connected IN series between a positive electrode clamp+ of the battery Clamp and a negative electrode Clamp-of the battery Clamp, a base electrode of the triode Q2 is connected between the resistor R10 and the resistor R7, a collector electrode of the triode Q2 is connected with an optical coupler U1, an emitter electrode of the triode Q2 is connected with a negative electrode Clamp-of the battery Clamp, when the battery Clamp clamps positive voltage, the triode Q2 is conducted, and a controller IN_clamp receives a low-level signal;
the voltage division sampling circuit is composed of a resistor R5, a resistor R6, a resistor R8 and a diode D4, wherein the resistor R6 and the resistor R5 are connected in series between a controller AD_Clamp end and a battery Clamp anode clamp+, the resistor R8 is connected between the controller AD_clamp end and a battery Clamp cathode Clamp-, the anode of the diode D4 is connected with the battery Clamp cathode Clamp-, the cathode of the diode D4 is connected between the resistor R6 and the resistor R5, and the controller AD_clamp end acquires specific voltage values to further judge the state of the battery Clamp.
The battery clamp state identification unit is based on the working principle:
default case: q1 is disconnected, EN_Curr_S outputs a low level, and IN_Clamp is pulled up to a high level;
step 1, judging the level state of the IN_Clamp, and if the level state is high, executing the step 2; if the voltage is at a low level, judging the state of the battery Clamp through the value of the AD_Clamp port:
taking a 12V battery car as an example:
if the value of AD_Clamp is less than or equal to 0, judging the clamping state of the storage battery as clamping reverse voltage;
if the voltage value of the two ends of the positive electrode and the negative electrode of the battery Clamp is 1V-4.8V through the AD_Clamp port, judging that the state of the battery Clamp is the Clamp forward low voltage;
if the voltage value of the two ends of the positive electrode and the negative electrode of the battery Clamp is 4.8V-13.5V through the AD_Clamp port, judging that the state of the battery Clamp is a proper forward voltage;
if the voltage value of the two ends of the positive electrode and the negative electrode of the battery Clamp is greater than 13.5V through the AD_Clamp port, judging that the state of the battery Clamp is a Clamp forward high voltage;
taking a 24V battery car as an example:
if the value of AD_Clamp is less than or equal to 0, judging the clamping state of the storage battery as clamping reverse voltage;
if the voltage value of the two ends of the positive electrode and the negative electrode of the battery Clamp is 1V-15.6V through the AD_Clamp port, judging that the state of the battery Clamp is the Clamp forward low voltage;
if the voltage value of the two ends of the positive electrode and the negative electrode of the battery Clamp is 15.6V-31V through the AD_Clamp port, judging that the state of the battery Clamp is a proper forward voltage;
if the voltage value of the two ends of the positive electrode and the negative electrode of the battery Clamp is greater than 31V through the AD_Clamp port, judging that the state of the battery Clamp is a Clamp forward high voltage;
At present, the technical field does not disclose such comprehensive battery clamp state judging structure, most of the battery clamp state judging structure only has the reverse connection preventing function, and safety accidents caused by product design defects can often occur. The emergency starting power supply battery clamp has the advantages that all conditions possibly encountered by the emergency starting power supply battery clamp are identified in the most accurate mode through the scheme, and the safety application of the product can be guaranteed even if the user operates improperly.
As shown in fig. 3, the controllable switch unit includes:
the direct-current contactor JK1, one end of the direct-current contactor JK1 is connected with the battery pack positive electrode BAT+, and the other end is connected with the battery Clamp positive electrode clamp+ for connecting or disconnecting the battery pack positive electrode and the battery Clamp positive electrode;
the resistor R9 and the MOS tube Q3 are connected in series to form a high-end driving circuit, the resistor R9 is connected with the EN_RL1 end controlled by the controller, the source electrode of the MOS tube Q3 is connected with the positive electrode BAT+ of the battery pack, and the drain electrode is connected with one end of the JK1 coil;
the resistor R11 and the MOS tube Q5 are connected in series to form a low-end driving circuit, the resistor R11 is connected and controlled by the EN_RL2 end of the controller, the source electrode of the MOS tube Q5 is connected with the negative electrode BAT-of the battery pack, the drain electrode is connected with the other end of the JK1 coil, when the controller drives the MOS tube Q3 and the MOS tube Q5 to be opened, the JK1 is closed, and the positive electrode of the battery pack is communicated with the positive electrode of the battery clamp;
diode D6, positive pole connects storage battery Clamp positive pole clamp+, drain electrode that MOS pipe Q3 is connected to the negative pole for maintain JK 1's closed state: when the battery pack anode and the battery clamp anode are communicated, the Q3 is disconnected, and the battery clamp anode has voltage, and JK1 can be kept in a closed state continuously through the diode D6;
the temperature control switch RT1, normally open type temperature controller, place it inside the group battery, one end is connected between resistance R11 and MOS pipe Q5, and the other end is connected with group battery negative pole BAT-, in case the group battery appears that the temperature is too high, RT1 can switch to the closed state immediately to turn off Q5, JK1 also breaks off thereupon, avoids the group battery high temperature to discharge, increases the security level.
The controllable switch unit further comprises a diode D5, wherein the anode of the diode D5 is connected with the drain electrode of the MOS tube Q5, and the cathode of the diode D5 is connected with the drain electrode of the MOS tube Q3 for freewheeling function when the JK1 is disconnected.
And one end of the RT1 is also connected with the IN_TDS end of the controller, and the switch information is fed back to the IN_TDS end of the controller and is used for informing the controller of the over-temperature information of the battery pack, so that the controller can make further actions.
The controllable switch unit works according to the following principle:
under the default condition, JK1 is disconnected, and the battery clamp has no power output;
when the battery clamping method is correct and the automobile is started, JK1 meets the closing condition, and the controller controls Q3 and Q5 to be opened, so that one end of a JK1 coil is connected to the positive pole VBT+ of the battery, the other end of the JK1 coil is connected to the negative pole VBT-, and therefore the JK1 contact is closed, and the positive pole clamp+ of the battery is connected to the positive pole VBT+;
the positive pole clamp+ of the battery Clamp is connected to one end of the JK1 coil through a diode D6, Q3 is disconnected at the moment, and the JK1 is kept in a closed state because the positive pole of the battery Clamp is electrified;
when the battery Clamp is short-circuited or over-current, the positive pole clamp+ voltage of the battery Clamp is pulled down, and once the voltage is lower than the maintaining voltage of JK1, the JK1 is disconnected, so that safety accidents are avoided, and the primary protection of battery discharge is formed;
in the state that the JK1 is closed, the temperature control switch RT1 is in an open state by default, and if the temperature control switch RT1 detects that the battery temperature is too high, the RT1 is closed, so that the Q5 is turned off; when Q5 is disconnected, JK1 is also disconnected, and the power output of the battery clamp is closed, so that the battery is prevented from discharging at high temperature, the secondary battery discharge protection is formed, the prior technical scheme does not have the secondary battery discharge protection function, and the safety of the lithium battery during discharging cannot be ensured, so that the safety accidents of battery bulge, fire and even explosion can often occur, and the personal and property safety is seriously damaged.
In summary, the battery clamp safety management system for the automobile emergency starting power supply has the advantages of mature and reliable scheme, high safety and wide application range.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present invention.
Claims (5)
1. The utility model provides a battery clamp safety control system of car emergency starting power source for the safety control of car emergency starting power source's group battery and battery clamp, its characterized in that includes: the system comprises a controller and a battery clamp system, wherein the controller is connected with the battery clamp system to acquire and control the execution state of the battery clamp system, the battery clamp system comprises a battery clamp state identification unit and a controllable switch unit, the battery clamp state identification unit identifies the current state of a battery clamp and feeds back the current state to the controller, and the controllable switch unit receives a control signal of the controller and closes or opens a circuit;
the battery clamp state identification unit comprises:
a small current test loop formed by serially connecting a resistor R3 and a diode D2: the resistor R3 is connected to the EN_Curr_S end of the controller, the diode D2 is connected to the positive electrode Clamp+ of the battery Clamp, and when the EN_Curr_S end of the controller outputs a high level, current is output to the positive electrode clamp+ of the battery Clamp along the direction of the diode D2, so that whether the battery Clamp is empty or not is judged;
and a high-current test loop formed by serially connecting a resistor R2, a MOS tube Q1, a resistor R1 and a diode D1: the resistor R2 is connected to the EN_Curr_L end of the controller and is used for receiving a controller driving signal and opening or closing the MOS tube Q1; the source electrode of the MOS tube Q1 is connected with the positive electrode BAT+ of the battery pack, the drain electrode of the MOS tube Q1 is connected with the resistor R1, and the resistor R1 is connected to the positive electrode clamp+ of the battery Clamp through the diode D1, when the output low level of the EN_Curr_L end of the controller is output, the MOS tube Q1 is opened, and the positive electrode of the battery pack outputs a larger current to the positive electrode of the battery Clamp for identifying whether the state of the battery Clamp is a positive-negative short circuit or a battery-free automobile;
the device comprises a reverse voltage testing loop, a controller IN_Clamp end, a voltage stabilizing circuit and a voltage stabilizing circuit, wherein the reverse voltage testing loop is formed by connecting an optical coupler U1 and a resistor R4 IN series and used for identifying the connection and the reverse of the positive electrode of a battery Clamp, the resistor R4 is connected to the positive electrode clamp+ of the battery Clamp, the optical coupler U1 is connected to the controller IN_clamp end, and when the battery Clamp is subjected to reverse voltage, the optical coupler U1 is conducted, and the controller IN_clamp receives a low-level signal;
the device comprises a diode D3, a resistor R10, a resistor R7 and a triode Q2, wherein the diode D3, the resistor R10 and the resistor R7 are sequentially connected IN series between a positive electrode clamp+ of the battery Clamp and a negative electrode Clamp-of the battery Clamp, a base electrode of the triode Q2 is connected between the resistor R10 and the resistor R7, a collector electrode of the triode Q2 is connected with an optical coupler U1, an emitter electrode of the triode Q2 is connected with a negative electrode Clamp-of the battery Clamp, when the battery Clamp clamps positive voltage, the triode Q2 is conducted, and a controller IN_clamp receives a low-level signal;
the voltage division sampling circuit comprises a resistor R5, a resistor R6, a resistor R8 and a diode D4, wherein the resistor R6 and the resistor R5 are connected in series between a controller AD_Clamp end and a battery Clamp anode clamp+, the resistor R8 is connected between the controller AD_clamp end and a battery Clamp cathode Clamp-, the anode of the diode D4 is connected with the battery Clamp cathode Clamp-, the cathode of the diode D4 is connected between the resistor R6 and the resistor R5, and the controller AD_clamp end acquires specific voltage values to further judge the state of the battery Clamp;
the controllable switch unit includes:
the direct-current contactor JK1, one end of the direct-current contactor JK1 is connected with the battery pack positive electrode BAT+, and the other end is connected with the battery Clamp positive electrode clamp+ for connecting or disconnecting the battery pack positive electrode and the battery Clamp positive electrode;
the high-end driving circuit is composed of a resistor R9 and a MOS tube Q3, wherein the resistor R9 is connected with an EN_RL1 end controlled by a controller, the other end of the resistor R9 is connected with a grid electrode of the MOS tube Q3, a source electrode of the MOS tube Q3 is connected with a battery pack positive electrode BAT+, and a drain electrode of the MOS tube Q3 is connected with one end of a JK1 coil;
the low-end driving circuit is composed of a resistor R11 and a MOS tube Q5, the resistor R11 is connected and controlled by the EN_RL2 end of the controller, the other end of the resistor R11 is connected with the grid electrode of the MOS tube Q5, the source electrode of the MOS tube Q5 is connected with the negative electrode BAT-of the battery pack, the drain electrode is connected with the other end of the JK1 coil, when the controller drives the MOS tube Q3 and the MOS tube Q5 to be opened, the JK1 is closed, and the positive electrode of the battery pack is communicated with the positive electrode of the battery clamp;
diode D6, positive pole connects storage battery Clamp positive pole clamp+, drain electrode that MOS pipe Q3 is connected to the negative pole for maintain JK 1's closed state: when the battery pack anode and the battery clamp anode are communicated, the Q3 is disconnected, and the JK1 can be kept in a closed state continuously through the diode D6 due to the voltage of the battery clamp anode;
the temperature control switch RT1 is normally open type temperature controller, one end of the temperature control switch RT1 is connected between the resistor R11 and the MOS tube Q5, the other end of the temperature control switch RT1 is connected with the negative electrode BAT-of the battery, once the temperature of the battery is overhigh, the RT1 can be immediately switched to a closed state, thereby the Q5 is turned off, the JK1 is also turned off, and the high-temperature discharge of the battery is avoided.
2. The battery clamp safety management system of the automobile emergency starting power supply according to claim 1, wherein the controllable switch unit further comprises a diode D5, an anode of the diode D5 is connected with a drain electrode of the MOS transistor Q5, and a cathode of the diode D5 is connected with a drain electrode of the MOS transistor Q3 for freewheeling when the JK1 is disconnected.
3. The battery clamp safety management system of the emergency starting power supply of the automobile according to claim 1, wherein one end of the RT1 is further connected with an IN_TDS end of the controller, switching information is fed back to the IN_TDS end of the controller, and the switching information is used for informing the controller of the over-temperature information of the battery pack and further actions are performed by the controller.
4. The battery clamp safety management system of an automotive emergency starting power supply according to claim 1, wherein the battery clamp state identification unit defaults to: q1 is disconnected, EN_Curr_S outputs a low level, and IN_Clamp is pulled up to a high level;
step 1, judging the level state of the IN_Clamp, and if the level state is high, executing the step 2; if the voltage is at a low level, judging the state of the battery Clamp through the value of the AD_Clamp port:
if the value of AD_Clamp is less than or equal to 0, judging the clamping state of the storage battery as clamping reverse voltage;
if the value of a0< AD_Clamp is less than or equal to a1, judging that the state of the battery Clamp is a Clamp forward low voltage;
if the value of a1< AD_Clamp is less than or equal to a2, judging that the state of the battery Clamp is a proper forward voltage;
if a2< AD_Clamp value, determining that the battery Clamp state is a Clamp forward high voltage, wherein a0, a1 and a2 are preset values;
step 2, the controller outputs the EN_Curr_S with a high level, judges the level state of the IN_Clamp, and if the IN_Clamp is the high level, executes the step 3; if the voltage is low, judging that the state of the battery clamp is no-load;
step 3, opening Q1, judging the level state of IN_Clamp, and if the level state is high, judging the state of the battery Clamp as positive and negative electrode short circuit; if the voltage is low, the state of the battery clamp is judged to be clamped to a battery-free automobile, and when the automobile is not provided with a battery, the internal load is 2 omega-20 omega.
5. The battery clamp safety management system of an automobile emergency starting power supply according to claim 1, wherein the controllable switch unit is disconnected by default with JK1, and the battery clamp has no power supply output;
when JK1 meets the closing condition, the controller controls Q3 and Q5 to be opened, so that one end of the JK1 coil is connected to the positive pole VBT+ of the battery, the other end of the JK1 coil is connected to the negative pole VBT-, and therefore the JK1 contact is closed, and the positive pole clamp+ of the battery Clamp is connected to the positive pole VBT+;
the battery Clamp anode clamp+ is connected to one end of the JK1 coil through a diode D6, and at the moment, Q3 is disconnected, and the JK1 is kept in a closed state;
when the battery Clamp is short-circuited or over-current, the positive pole clamp+ voltage of the battery Clamp is pulled down, and once the voltage is lower than the maintaining voltage of JK1, the JK1 is disconnected, so that safety accidents are avoided, and the primary protection of battery discharge is formed;
in the state that the JK1 is closed, the temperature control switch RT1 is in an open state by default, and if the temperature control switch RT1 detects that the battery temperature is too high, the RT1 is closed, so that the Q5 is turned off; when Q5 is disconnected, JK1 is also disconnected, the power output of the battery clamp is closed, the battery is prevented from discharging at high temperature, and the secondary discharge protection of the battery is formed.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108979931B (en) * | 2018-09-05 | 2024-03-19 | 深圳市小樱桃实业有限公司 | Device for providing power for emergency starting of engine |
| CN109347172B (en) * | 2018-11-22 | 2023-10-27 | 浙江安伴汽车安全急救技术股份有限公司 | Portable starting power supply for vehicle |
| CN113824177B (en) * | 2021-08-06 | 2024-08-16 | 深圳市格瑞普电池有限公司 | Safety connection device and emergency starting power supply |
| WO2023082083A1 (en) * | 2021-11-10 | 2023-05-19 | 深圳市华思旭科技有限公司 | Voltage measurement circuit, vehicle jump starter and battery clip |
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| CN204801693U (en) * | 2015-07-17 | 2015-11-25 | 深圳市康爱实业有限公司 | Emergent start power of protection car is switched to area intelligence |
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| CN206471859U (en) * | 2016-12-26 | 2017-09-05 | 苏州绿恺动力电子科技有限公司 | A kind of battery clamp safety management system of car emergency startup power supply |
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| WO2012080996A1 (en) * | 2010-12-16 | 2012-06-21 | Jtm Power Limited | A jump starter |
| CN204801693U (en) * | 2015-07-17 | 2015-11-25 | 深圳市康爱实业有限公司 | Emergent start power of protection car is switched to area intelligence |
| CN106166990A (en) * | 2016-08-23 | 2016-11-30 | 深圳市华思旭科技有限公司 | A kind of startup power circuit |
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