CN208999516U - A kind of high voltage interlock circuit - Google Patents
A kind of high voltage interlock circuit Download PDFInfo
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- CN208999516U CN208999516U CN201821683068.4U CN201821683068U CN208999516U CN 208999516 U CN208999516 U CN 208999516U CN 201821683068 U CN201821683068 U CN 201821683068U CN 208999516 U CN208999516 U CN 208999516U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model discloses a kind of high voltage interlock circuit, including entire car controller, the first relay, the second relay and high tension apparatus；First relay includes the first control terminal, the second control terminal, the first output end and second output terminal, and the second relay includes third control terminal, the 4th control terminal, third output end and the 4th output end；The output end of entire car controller is electrically connected with the first control terminal, and the second control terminal is electrically connected the first reference voltage；Second output terminal is electrically connected with high tension apparatus first end；The input terminal of entire car controller is electrically connected with third output end, and the 4th output end is electrically connected the second reference voltage；4th control terminal is electrically connected with high tension apparatus second end；First output end is electrically connected to power supply, and third control terminal ground connection or the first output end ground connection, third control terminal are electrically connected to power supply.In realizing detection high voltage interlock circuit under the premise of failure, the high voltage that can avoid high tension apparatus enters entire car controller and gives entire car controller bring hardware damage.
Description
Technical field
The utility model relates to technical field of new energy more particularly to a kind of high voltage interlock circuits.
Background technique
High voltage interlock circuit is widely used in new-energy automobile, for checking automobile by using low-voltage signal
All each branches being connected with high voltage bus, generally include entire battery system, conducting wire, connector, vehicle-mounted Switching Power Supply, high pressure
The electrical connection integrality of the system circuits such as box and protection cap.
In the prior art, high voltage interlock circuit generally includes to be integrated in the output electricity of the high-voltage interlocking PWM in entire car controller
Road and high-voltage interlocking PWM Acquisition Circuit, connect automobile between high-voltage interlocking PWM output circuit and high-voltage interlocking PWM Acquisition Circuit
External high pressure device, such as vehicle-mounted Switching Power Supply, onboard charger.Entire car controller passes through high-voltage interlocking PWM output circuit
A signal voltage is exported, is then returned after automobile external high tension apparatus by the acquisition of high-voltage interlocking PWM Acquisition Circuit
Signal voltage, entire car controller according to the signal voltage of return i.e. can determine whether in high voltage interlock circuit with the presence or absence of open circuit, over the ground
Short circuit or to failures such as power supply short circuits.
However, high pressure range leads to vehicle between 300V-600V because the voltage of the external high pressure device of automobile is higher
The high-voltage interlocking PWM output circuit and high-voltage interlocking PWM Acquisition Circuit of controller are easy incoming high pressure, cause entire car controller
Hardware damage.
Utility model content
The utility model provides a kind of high voltage interlock circuit, and to realize, entire car controller and outside are high in high voltage interlock circuit
The isolation of voltage device, avoiding the high pressure of external high pressure device from being passed to entire car controller leads to the hardware damage of entire car controller.
The utility model embodiment provides a kind of high voltage interlock circuit, including entire car controller, the first relay, second
Relay and high tension apparatus；First relay includes the first control terminal, the second control terminal, the first output end and second output terminal,
Second relay includes third control terminal, the 4th control terminal, third output end and the 4th output end；
The output end of entire car controller is electrically connected with the first control terminal, and the second control terminal is electrically connected to the first reference voltage；
Second output terminal is electrically connected with the first end of high tension apparatus；
The input terminal of entire car controller is electrically connected with third output end, and the 4th output end is electrically connected to the second reference voltage；
4th control terminal is electrically connected with the second end of high tension apparatus；
Wherein, the first output end is electrically connected to power supply, third control terminal ground connection or the first output end ground connection, third control
End processed is electrically connected to power supply.
Wherein, the first relay includes first coil and first switch, and first switch is controlled by first coil, first coil
First control terminal of the first end as the first relay, second control of the second end of first coil as the first relay
End, first output end of the first end of first switch as the first relay, the second end of first switch is as the first relay
Second output terminal；
Second relay includes the second coil and second switch, and second switch controlled by the second coil, and the of the second coil
Third control terminal of the one end as the second relay, fourth control terminal of the second end of the second coil as the second relay, the
Third output end of the first ends as the second relay of two switches, the second end of second switch as the second relay the 4th
Output end.
Wherein, entire car controller includes control unit, output circuit and switch Acquisition Circuit, and control unit passes through output electricity
Road is electrically connected to the output end of entire car controller；The input that control unit is electrically connected to entire car controller by switching Acquisition Circuit
End；Control unit is used to control the on or off of first switch by output circuit, and for passing through switch Acquisition Circuit
Detect the on or off state of second switch.
Wherein, output circuit includes the first transistor and current acquisition unit, and the control terminal of the first transistor and control are single
The output end electrical connection of member, the first end of the first transistor are connected to power supply, the second end and entire car controller of the first transistor
Output end and current acquisition unit input terminal electrical connection, the first input of the output end of current acquisition unit and control unit
End electrical connection.
Wherein, switch Acquisition Circuit includes first capacitor, the second capacitor, first resistor, second resistance and 3rd resistor, the
First pole of one capacitor is electrically connected with the input terminal of entire car controller, the second pole ground connection of first capacitor；The first of first resistor
End is electrically connected with the first pole of first capacitor, the second end ground connection of first resistor；The first end of second resistance and first resistor
First end electrical connection, the second end of second resistance are electrically connected with the first end of 3rd resistor, the second end ground connection of 3rd resistor；The
First pole of two capacitors is electrically connected with the first end of 3rd resistor, the second pole ground connection of the second capacitor, the first pole of the second capacitor
It is electrically connected with the second input terminal of control unit.
Wherein, the first reference voltage is ground voltage.
Wherein, the second reference voltage is the voltage of power supply output.
Wherein, high voltage interlock circuit includes at least two high tension apparatus, and each high tension apparatus is connected in series in the first relay
Second output terminal and second relay the 4th control terminal between.
Wherein, power supply is Vehicular battery.
High voltage interlock circuit provided by the embodiment of the utility model passes through the output end and high tension apparatus in entire car controller
Between and the input terminal and high tension apparatus of entire car controller between be respectively provided with the first relay and the second relay, it is whole
The output end of vehicle controller is electrically connected with the first control terminal of the first relay, and the second control terminal is electrically connected to first with reference to electricity
Pressure；The second output terminal of first relay is electrically connected with the first end of high tension apparatus；The input terminal of entire car controller and second after
The third output end of electric appliance is electrically connected, and the 4th output end is electrically connected to the second reference voltage；4th control terminal of the second relay
It is electrically connected with the second end of high tension apparatus, the first output end is electrically connected to power supply, third control terminal ground connection or the first output end
Ground connection, third control terminal are electrically connected to power supply, are electrically connected so that entire car controller is not direct with high tension apparatus, are realizing that detection is high
In pressure interlock circuit under the premise of failure, entire car controller can be entered to entire car controller to avoid the high voltage of high tension apparatus
Bring hardware damage.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram for high voltage interlock circuit that the utility model embodiment one provides.
Fig. 2 is a kind of structural schematic diagram for high voltage interlock circuit that the utility model embodiment two provides.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 show a kind of structural schematic diagram of high voltage interlock circuit of the offer of the utility model embodiment one, the high pressure
Interlock circuit includes: entire car controller 110, the first relay 120, the second relay 130 and high tension apparatus 140；First relay
Device 120 includes the first control terminal A1, the second control terminal A2, the first output end B1 and second output terminal B2, the second relay 130 packet
Include third control terminal A3, the 4th control terminal A4, third output end B3 and the 4th output end B4；
The output end OUT of entire car controller 110 is electrically connected with the first control terminal A1, and the second control terminal A2 is electrically connected to first
Reference voltage 150；Second output terminal B2 is electrically connected with the first end D1 of high tension apparatus 140；
The input terminal IN of entire car controller 110 is electrically connected with third output end B3, and the 4th output end B4 is electrically connected to second
Reference voltage 160；4th control terminal A4 is electrically connected with the second end D2 of high tension apparatus 140；
Wherein, the first output end B1 is electrically connected to power supply 170, and third control terminal A3 ground connection or the first output end B1 connect
Ground, third control terminal A3 are electrically connected to power supply 170.
High voltage interlock circuit is for checking all each branches being connected with high voltage bus on electric car, including entire electricity
The electrical connection of the system circuits such as cell system, conducting wire, connector, vehicle-mounted Switching Power Supply, electric machine controller, high-voltage cage and protection cap
Integrality.When entire dynamical system high tension loop connects disconnection or integrality by destroying, it is necessary to starting safety
Measure, such as alarm or disconnection high tension loop.It is made of due to new-energy automobile dynamical system multiple subsystems, they two
It is all to be connected with each other by high-tension connector, while the environment run is more severe between two, most of operating conditions are in vibration and punching
Connection under the conditions of hitting, therefore between subsystems is it is possible that the fault conditions such as open circuit or short circuit, therefore high-voltage interlocking
Circuit is to ensure that the key of personnel safety and vehicle arrangement safe operation.But in high voltage interlock circuit, if entire car controller
110 are directly connected with external high tension apparatus 140, and the high voltage of high tension apparatus 140 may enter entire car controller 110,
And the hardware in entire car controller 110 includes low-voltage circuit, the high voltage of high tension apparatus 140 will cause entire car controller after entering
110 hardware damage.
With reference to Fig. 1, high voltage interlock circuit provided in this embodiment, in the output end OUT and high-voltage device of entire car controller 110
The first relay 120 is respectively provided between part 140 and between the input terminal IN and high tension apparatus 140 of entire car controller 110
With the second relay 130, each high tension apparatus 140 is connected between the first relay 120 and the second relay 130 on automobile.Tool
Body, the control section of the output end OUT of entire car controller 110 and the first relay 120, specifically the first relay 120
First control terminal A1 electrical connection, the second control terminal A2 of the first relay 120 are connected to the first reference voltage 150, the first relay
First output end B1 of device 120 is electrically connected with power supply 170, and second output terminal B2 is electrically connected with high tension apparatus 140, i.e. full-vehicle control
The output end OUT of device 110 is not direct to be connect with high tension apparatus 140；The input terminal IN and the second relay of entire car controller 110
130 output par, c, the third output end B3 electrical connection of specifically the second relay 130, the 4th output of the second relay 130
End B4 is connected to the second reference voltage, and the 4th control terminal A4 of the second relay 130 is electrically connected with high tension apparatus 140, third control
A3 ground connection in end processed or connection supply voltage, when the first output end B1 connection power supply 170 of the first relay 120, the second relay
The third control terminal A3 of device 130 is grounded；When the first output end B1 of the first relay 120 ground connection, the of the second relay 130
Three control terminal A3 are electrically connected with power supply 170, so that the first output end B1 and second output terminal B2 conducting in the first relay 120
And when connecting fault-free between each high tension apparatus 140, access of the power supply 170 through high tension apparatus 140 to ground can be formed.Thus may be used
Know, the input terminal IN of entire car controller 110 is not also directly connected to high tension apparatus 140.Therefore, by high tension apparatus 140 with
Distinguish between the output end OUT of entire car controller 110 and between high tension apparatus 140 and the input terminal IN of entire car controller 110
First relay 120 and the second relay 130, even if the case where high pressure leakage occurs in high tension apparatus 140, high voltage are set
It cannot be introduced into entire car controller 110, realize being isolated between entire car controller 110 and high tension apparatus 140.
When detecting the integrality of each 140 system circuit of high tension apparatus by high voltage interlock circuit, entire car controller 110 is logical
It crosses output end and exports first control signal, the control of the first control terminal A1 of the first relay 120 and second to the first relay 120
Hold A2 after receiving the first control signal, control the first relay 120 the first output end B1 and second output terminal B2 it
Between be connected, exportable first current signal of the second output terminal B2 of the first relay 120 or first voltage signal, for example, first after
The second output terminal B2 of electric appliance 120 exports the first current signal, when high tension apparatus 140 each on automobile is without failures such as short circuits and open circuit
When, after which flows through each high tension apparatus 140, the 4th control terminal A4 of the second relay 130 be can receive to first
Current signal is connected between the third output end B3 and the 4th output end B4 of the second relay 130.4th output end B4 connection
Two reference voltages 160, when third output end B3 and the 4th output end B4 are connected, the input terminal IN input of entire car controller 110 the
Two reference voltages 160, entire car controller 110 can be detected input terminal IN and input corresponding electric current, can be determined that high pressure is mutual at this time
Without short circuit or open circuit fault in lock circuit；Opposite, if entire car controller 110 fails to have detected electric current input, can sentence
Determine the presence of shorted to earth or open circuit in high voltage interlock circuit.Entire car controller 110 can also by output end to first after
Electric appliance 120 exports second control signal, after the first control terminal A1 of the first relay 120 receives the control signal, can control
First output end B1's and second output terminal B2 is separated, at this point, if company in high voltage interlock circuit between each high tension apparatus 140
Fault-free is connect, then the 4th control terminal A4 of the second relay 130 does not receive electric current, the third output end of the second relay 130
It should be to disconnect between B3 and the 4th output end B4, the input terminal IN of entire car controller 110 should cannot receive electric current；On the contrary
, if the 4th control terminal A4 of the second relay 130 receives electric current, can make between third output end B3 and the 4th output end B4
Conducting, the input terminal IN of entire car controller 110 then can receive electric current, and then can determine that in the high voltage interlock circuit and exist to electricity
The failure of 170 short circuit of source.
It should be noted that high voltage interlock circuit shown in Fig. 1 is only electrically connected to power supply 170 with the first output end B1, the
Three control terminal A3 ground connection is schematically illustrated, and when the first output end B1 is grounded, third control terminal A3 is electrically connected to power supply 170
When, the mode detected in high voltage interlock circuit with the presence or absence of failure is similar with Fig. 1, and details are not described herein.
High voltage interlock circuit provided in this embodiment, by between the output end and high tension apparatus of entire car controller, with
And it is respectively provided with the first relay and the second relay between the input terminal and high tension apparatus of entire car controller, it is detected realizing
In high voltage interlock circuit under the premise of failure, so that entire car controller is not electrically connected directly with high tension apparatus, high tension apparatus is avoided
High voltage enter entire car controller and give entire car controller bring hardware damage.
Embodiment two
Fig. 2 is a kind of structural schematic diagram for high voltage interlock circuit that the utility model embodiment two provides.The present embodiment is built
It stands on the basis of above-described embodiment one, it is further provided a kind of optional high voltage interlock circuit.With reference to Fig. 2, optionally,
First relay 120 includes first coil 121 and first switch 122, and first switch 122 is controlled by first coil 121, First Line
First control terminal A1 of the first end of circle 121 as the first relay 120, the second end of first coil 121 is as the first relay
Second control terminal A2 of device 120, first output end B1 of the first end of first switch 122 as the first relay 120, first opens
Second output terminal B2 of the second end of pass 122 as the first relay 120；
Second relay 130 includes the second coil 131 and second switch 132, and second switch 132 is controlled by the second coil 131
System, third control terminal A3 of the first end of the second coil 131 as the second relay 130, the second end conduct of the second coil 131
4th control terminal A4 of the second relay 130, third output end of the first end of second switch 132 as the second relay 130
B3, fourth output end B4 of the second end of second switch 132 as the second relay 130.
Specifically, control section of the first coil 121 as the first relay 120, entire car controller 110 is exported by it
Hold OUT to export control signal to the first end of first coil 121, first coil 121 electric, the controlled by first coil 121
One switch 122 closure.Illustratively, when the first end B1 of first switch 122 is electrically connected with power supply 170, power supply 170 can pass through
The first switch 122 of conducting exports current or voltage signal to high tension apparatus 140, when there is no failures in high voltage interlock circuit
When, which can be transmitted to the second coil 131 of the second relay 130, the second coil 131 it is electric after, second
Switch 132 is closed, and the second end of second switch 132 is connect with the second reference voltage 160, the electricity that the second reference voltage 160 provides
Stream or voltage signal are input in entire car controller 110, the control signal that entire car controller 110 can be exported according to its output end,
And with the presence or absence of failure, specific determination method and above-described embodiment in the signal determining high voltage interlock circuit that receives of input terminal
Identical in one, details are not described herein.
Optionally, entire car controller 110 includes control unit 111, output circuit 112 and switch Acquisition Circuit 113, control
Unit 111 is electrically connected to the output end OUT of entire car controller 110 by output circuit 112；Control unit 111 is adopted by switch
Collector 113 is electrically connected to the input terminal IN of entire car controller 110；Control unit 111 is used for through the control of output circuit 112 the
The on or off of one switch 122, and the on or off for detecting second switch 132 by switch Acquisition Circuit 113
State.
Specifically, entire car controller 110 can make 112 output voltage of output circuit or electric current by controlling output circuit 112
Signal also can control output circuit 112 not output voltage or current signal, export current or voltage signal in output circuit 112
When, first switch 122 could be connected, and then realize that control unit 111 indirectly controls the turn-on and turn-off shape of first switch 122
State.Because the input terminal IN of entire car controller 110 is directly electrically connected with the second reference voltage 160 by second switch 132, second is opened
When closing 132 conducting, the second reference voltage 160 is directly inputted to entire car controller 110, for the control list of entire car controller 110
For member 111, if the excessively high acquisition range that may exceed control unit 111 of the second reference voltage 160, therefore in control unit
Setting switch Acquisition Circuit 113, control unit 111 can be adopted by the switch between 111 and the input terminal IN of entire car controller 110
Collector 113 acquires the conducting off state of second switch 132, it can be achieved that accurately acquiring second switch in the second relay 130
132 conducting off state, and then determine to whether there is failure in high-voltage interlocking circuit.
Optionally, output circuit 112 includes the first transistor 1121 and current acquisition unit 1122, the first transistor 1121
Control terminal G be electrically connected with 111 output end of control unit, the first end of the first transistor 1121 is connected to power supply 170, and first is brilliant
The second end of body pipe 1121 is electrically connected with the input terminal of the output end OUT of entire car controller 110 and current acquisition unit 1122, electricity
The output end of stream acquisition unit 1122 is electrically connected with the first input end E1 of control unit 111.
By taking the first transistor 1121 is P-type transistor as an example, control terminal G of the control unit 111 to the first transistor 1121
When input low level signal, the first transistor 1121 is connected, and the current or voltage signal that power supply 170 exports passes through the first of conducting
Transistor 1121 is transmitted to the output end OUT of entire car controller 110, is then transmit to the coil of the first relay 120, and then control
First switch 122 processed is connected, and current acquisition unit can collect electric current at this time, and be transmitted to control unit 111, control unit
111 can determine the state that the first relay 120 is in conduct based on this, and group switch Acquisition Circuit 113 is collected
The state of second relay 130 determines in high voltage interlock circuit with the presence or absence of failure, such as switch Acquisition Circuit 113 collects
When the second switch 132 of second relay 130 is in an off state, determine there is open circuit or shorted to earth in high voltage interlock circuit
Failure.Control terminal G input high level signal from control unit 111 to the first transistor 1121 when, the first transistor 1121 is cut
Only, the current or voltage that power supply 170 exports can not be transmitted to the output end OUT of entire car controller 110, and first coil 121 cannot
Must be electric, first switch 122 turns off, and current acquisition unit 1122 does not acquire electric current at this time, and control unit 111 does not just receive yet
The collected current signal of current acquisition unit 1122, control unit 111 can determine that the first relay 120 is in power loss based on this
Off-state, and the state of collected second relay 130 of synthetical collection circuit determines whether deposit in high voltage interlock circuit
In failure, such as when Acquisition Circuit collects the second switch 132 of the second relay 130 and is in an off state, determine that high pressure is mutual
Failure is not present in lock circuit.
Optionally, switch Acquisition Circuit 113 includes first capacitor C1, the second capacitor C2, first resistor R1, second resistance R2
With 3rd resistor R3, the first pole of first capacitor C1 is electrically connected with the input terminal IN of entire car controller 110, and the of first capacitor C1
Two poles ground connection；The first end of first resistor R1 is electrically connected with the first pole of first capacitor C1, the second end ground connection of first resistor R1；
The first end of second resistance R2 is electrically connected with the first end of first resistor R1, and the second end of second resistance R2 is with 3rd resistor R3's
First end electrical connection, the second end ground connection of 3rd resistor R3；The first pole of second capacitor C2 and the first end electricity of 3rd resistor R3
Connection, the second pole ground connection of the second capacitor C2, the first pole of the second capacitor C2 is electrically connected with the second input terminal E2 of control unit 111
It connects.
Specifically, first capacitor C1 can be filtered and filter out electrostatic, the second electricity to the input signal of entire car controller 110
Resistance R2 and 3rd resistor R3 can divide input signal, so that the signal voltage for being transmitted to control unit 111 is not too big,
Second capacitor C2 plays the role of the secondary filtering to the signal after partial pressure.The signal of 110 input terminal of entire car controller input passes through
The filter again of the filtering of first capacitor C1 and the partial pressure of filter electrostatic, second resistance R2 and 3rd resistor R3 and the second capacitor C2
Wave enters control unit 111, makes control signal that can accurately determine 130 status of the second relay, and then determine high pressure
It whether there is failure in interlock circuit.
On the basis of above scheme, optionally, the first reference voltage 150 is ground voltage.The of first relay 120
One control terminal A1 is electrically connected with the output end OUT of entire car controller 110, the second control terminal A2 of the first relay 120 and ground connection
Second control terminal A2 of voltage electrical connection or the first relay 120 is connect with other voltages, guarantees the second control terminal A2 connection
Voltage be lower than the supply voltage that is accessed of the first control terminal A1, form voltage between the first control terminal A1 and the second control terminal A2
Difference, the first end of the first transistor 1121 is connect with vehicle power supply in output circuit 112, at this point for the first relay
Flash driving effectively, controls signal when entire car controller 110 is exported by its output end OUT to the first control terminal A1 for 120
Afterwards, voltage difference is formed between the first control terminal A1 and the second control terminal A2, therefore can control the first output end B1 and second output terminal
It is connected between B2.
Optionally, the second reference voltage 160 is the voltage that power supply 170 exports.
Second reference voltage 160 is the voltage that power supply 170 exports, and the both ends of second switch 132 are separately connected supply voltage
With the input terminal IN of entire car controller, second switch 132 is that high level effectively switchs at this time, when the third of the second relay 130
When being connected between output end B3 and the 4th output end B4, the second reference voltage 160 can pass through the input terminal IN of entire car controller 110
It is input to entire car controller 110, the control signal determining high-voltage interlocking circuit that entire car controller 110 is exported in combination with its output end
With the presence or absence of failure.It should be noted that the second reference voltage 160 can also be other voltages, guarantee the of the second relay 130
Four output end B4 voltages are higher than the voltage of third output end B3, make between the 4th output end B4 and third output end B3 that there are voltages
Difference.
Optionally, high voltage interlock circuit includes at least two high tension apparatus, and each high tension apparatus is connected in series in the first relay
Between the second output terminal B2 of device 120 and the 4th control terminal A4 of second relay 130.Fig. 2 is with high voltage interlock circuit packet
Four high tension apparatus are included, respectively vehicle-mounted Switching Power Supply 141, onboard charger 142, vehicle distribution control box 143 and electronic pressure
Contracting machine 144, is schematically illustrated.
It should be noted that high tension apparatus 140 is not limited to the present embodiment the above-mentioned device of offer, on automobile also it is settable its
His high tension apparatus, these other high tension apparatus also are included in high voltage interlock circuit provided in this embodiment.
Optionally, power supply 170 is Vehicular battery.
Specifically, the output voltage of Vehicular battery is usually 9-16V, when the first relay 120 the first output end B1 and
When being connected between second output terminal B2, the voltage input is into high tension apparatus 140, it can be achieved that high voltage interlock circuit is believed by low pressure
Number come detect high-pressure system circuit integrality function.
High voltage interlock circuit provided in this embodiment, by be arranged entire car controller include control unit, output circuit and
Acquisition Circuit is switched, includes current acquisition unit in output circuit, the signal of output circuit output is controlled by control unit
The on or off state of the first relay is indirectly controlled, and first switch in the first relay is acquired by current acquisition unit
Whether be connected, and whether be connected by the second switch that switch Acquisition Circuit acquires the second relay, and be based on first switch
Determine to whether there is failure in high voltage interlock circuit with the on state of second switch, realizes the failure to high voltage interlock circuit
Detection, and realizes the physical isolation of entire car controller and high tension apparatus, when preventing high tension apparatus high-pressure leakage caused by it is whole
The hardware damage of vehicle controller.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright
Aobvious variation, readjustment and substitution is without departing from the protection scope of the utility model.Therefore, although passing through above embodiments
The utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from
It can also include more other equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Scope of the claims determine.
Claims (9)
1. a kind of high voltage interlock circuit, which is characterized in that including entire car controller, the first relay, the second relay and high pressure
Device；First relay include the first control terminal, the second control terminal, the first output end and second output terminal, described second
Relay includes third control terminal, the 4th control terminal, third output end and the 4th output end；
The output end of the entire car controller is electrically connected with first control terminal, and second control terminal is electrically connected to the first ginseng
Examine voltage；The second output terminal is electrically connected with the first end of the high tension apparatus；
The input terminal of the entire car controller is electrically connected with the third output end, and the 4th output end is electrically connected to the second ginseng
Examine voltage；4th control terminal is electrically connected with the second end of the high tension apparatus；
Wherein, first output end is electrically connected to power supply, the third control terminal ground connection or the first output termination
Ground, the third control terminal are electrically connected to power supply.
2. high voltage interlock circuit according to claim 1, which is characterized in that first relay include first coil and
First switch, the first switch are controlled by the first coil, and the first end of the first coil is as first relay
First control terminal of device, second control terminal of the second end of the first coil as first relay, described first opens
First output end of the first end of pass as first relay, the second end of the first switch is as first relay
The second output terminal of device；
Second relay includes the second coil and second switch, and the second switch is controlled by second coil, described
Third control terminal of the first end of second coil as second relay, the second end of second coil is as described
4th control terminal of two relays, third output end of the first end of the second switch as second relay are described
Fourth output end of the second end of second switch as second relay.
3. high voltage interlock circuit according to claim 2, which is characterized in that the entire car controller include control unit,
Output circuit and switch Acquisition Circuit, described control unit are electrically connected to the defeated of the entire car controller by the output circuit
Outlet；Described control unit is electrically connected to the input terminal of the entire car controller by the switch Acquisition Circuit；The control
Unit is used to control the on or off of the first switch by the output circuit, and for being acquired by the switch
Circuit detects the on or off state of the second switch.
4. high voltage interlock circuit according to claim 3, which is characterized in that the output circuit include the first transistor and
Current acquisition unit, the control terminal of the first transistor are electrically connected with the output end of described control unit, the first crystal
The first end of pipe is connected to power supply, the output end and the electric current of the second end of the first transistor and the entire car controller
The input terminal of acquisition unit is electrically connected, and the output end of the current acquisition unit and the first input end of described control unit are electrically connected
It connects.
5. high voltage interlock circuit according to claim 3, which is characterized in that the switch Acquisition Circuit includes the first electricity
Appearance, the second capacitor, first resistor, second resistance and 3rd resistor, the first pole of the first capacitor and the entire car controller
Input terminal electrical connection, the first capacitor the second pole ground connection；The first end of the first resistor and the first capacitor
The electrical connection of first pole, the second end ground connection of the first resistor；The of the first end of the second resistance and the first resistor
One end electrical connection, the second end of the second resistance is electrically connected with the first end of the 3rd resistor, and the of the 3rd resistor
Two ends ground connection；First pole of second capacitor is electrically connected with the first end of the 3rd resistor, and the second of second capacitor
Pole ground connection, the first pole of second capacitor is electrically connected with the second input terminal of described control unit.
6. high voltage interlock circuit according to claim 1, which is characterized in that first reference voltage is ground voltage.
7. high voltage interlock circuit according to claim 1, which is characterized in that second reference voltage is that the power supply is defeated
Voltage out.
8. high voltage interlock circuit according to claim 1, which is characterized in that the high voltage interlock circuit includes at least two
High tension apparatus, each high tension apparatus be connected in series in first relay second output terminal and second relay
Between 4th control terminal.
9. high voltage interlock circuit according to claim 1, which is characterized in that the power supply is Vehicular battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821683068.4U CN208999516U (en) | 2018-10-17 | 2018-10-17 | A kind of high voltage interlock circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821683068.4U CN208999516U (en) | 2018-10-17 | 2018-10-17 | A kind of high voltage interlock circuit |
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|---|---|
| CN208999516U true CN208999516U (en) | 2019-06-18 |
Family
ID=66803940
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821683068.4U Active CN208999516U (en) | 2018-10-17 | 2018-10-17 | A kind of high voltage interlock circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021232883A1 (en) * | 2020-05-22 | 2021-11-25 | 宁德时代新能源科技股份有限公司 | High-voltage interlock circuit and detection method therefor |
| CN113866666A (en) * | 2020-06-12 | 2021-12-31 | 宁德时代新能源科技股份有限公司 | High-voltage interlocking circuit and fault detection method thereof |
-
2018
- 2018-10-17 CN CN201821683068.4U patent/CN208999516U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021232883A1 (en) * | 2020-05-22 | 2021-11-25 | 宁德时代新能源科技股份有限公司 | High-voltage interlock circuit and detection method therefor |
| CN113777521A (en) * | 2020-05-22 | 2021-12-10 | 宁德时代新能源科技股份有限公司 | High-voltage interlocking circuit and detection method thereof |
| EP3940408A4 (en) * | 2020-05-22 | 2022-04-27 | Contemporary Amperex Technology Co., Limited | High-voltage interlock circuit and detection method therefor |
| US11413965B2 (en) | 2020-05-22 | 2022-08-16 | Contemporary Amperex Technology Co., Limited | High voltage interlock circuit and detection method thereof |
| CN113866666A (en) * | 2020-06-12 | 2021-12-31 | 宁德时代新能源科技股份有限公司 | High-voltage interlocking circuit and fault detection method thereof |
| CN113866666B (en) * | 2020-06-12 | 2023-11-21 | 宁德时代新能源科技股份有限公司 | High-voltage interlocking circuit and fault detection method thereof |
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Address after: 4 / F, building 1, No.14 Jiuxianqiao Road, Chaoyang District, Beijing 100020 Patentee after: Beijing Jingwei Hirain Technologies Co.,Inc. Address before: 100101 Beijing city Chaoyang District Anxiang Beili 11 B block 8 layer of Beijing Jingwei Hengrun Technology Co. Ltd. Patentee before: Beijing Jingwei HiRain Technologies Co.,Ltd. |
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