CN106143161A - A kind of high pressure monitoring device of electric automobile - Google Patents
A kind of high pressure monitoring device of electric automobile Download PDFInfo
- Publication number
- CN106143161A CN106143161A CN201610711753.2A CN201610711753A CN106143161A CN 106143161 A CN106143161 A CN 106143161A CN 201610711753 A CN201610711753 A CN 201610711753A CN 106143161 A CN106143161 A CN 106143161A
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- China
- Prior art keywords
- control module
- voltage
- testing circuit
- monitoring device
- pressure monitoring
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
Abstract
The present invention provides the high pressure monitoring device of a kind of electric automobile, including the first control module, testing circuit and the second control module, testing circuit includes the interlock circuit of two or more high-voltage connector, interlock circuit is sequentially connected in series, the two ends of each interlock circuit are parallel with the resistance of different resistance, first control module, testing circuit and the second control module are sequentially connected in series, the high pressure monitoring device of the present invention, can interpolate that out and whether break down, can also show that the high-pressure insert that breaks down is where simultaneously, allow a technician to look for position to keep in repair accurately, but also the danger got an electric shock will not occur.When opening the lid of high voltage device box; whole testing circuit is in the state of disconnection; in the case of making to connect high-tension electricity when technical staff forgets power-off or lid is not locked; reach lid and be in when opening the situation being in disconnecting; make the situation being not susceptible to get an electric shock, and then protect the life security of personnel.
Description
Technical field
The present invention relates to electric automobile field, particularly relate to the high pressure monitoring device of a kind of electric automobile.
Background technology
Having many in electric motor car is high voltage electric device, also has car load factory not have high pressure monitoring device, in other words now
High pressure monitoring device now cannot meet detection requirement.When not having high pressure monitoring device, personnel are easily occurred to get an electric shock and die
Risk, and whether high pressure monitoring device now is to be turned on by the interlocking signal of monitoring high-pressure insert to confirm the company of plug-in unit
Connecing state, interlocking signal is various, controls complexity, or interlocking signal is more single, but which position cannot confirm is
Plug-in unit breaks down, and therefore brings many troubles for discharge fault.High voltage device lid the most now is not being locked or is not being pacified
During mounted box lid, the vehicle of electric automobile can travel in the same old way so that electric automobile exists vehicle body electric leakage or car risk is burnt in short circuit, gives
People bring the danger of personal safety.
Summary of the invention
The invention reside in the high pressure monitoring device providing a kind of electric automobile, the personnel when high pressure is monitored that solve easily occur
Get an electric shock, the high-pressure insert position broken down cannot be confirmed and there is no the problem taking off lid protection of high voltage device.
The present invention is achieved in that the high pressure monitoring device of a kind of electric automobile, including the first control module, detection electricity
Road and the second control module；
Testing circuit includes the interlock circuit 21 of two or more high-voltage connector, and described interlock circuit is sequentially connected in series, each
The two ends of interlock circuit are parallel with the resistance of different resistance；
Described first control module, testing circuit and the second control module are sequentially connected in series；
Described first control module is for testing circuit outputs level signals；
Described second control module is for the output voltage of testing circuit, and judges high-voltage device according to described output voltage
Part connects the position whether fault and fault occur.
Further, described high-voltage connector includes that socket and plug, the interlock circuit of described high-voltage connector include setting
The Part I being placed in socket and Part II, described Part I and Part II disconnect and arranging, and described interlock circuit is also
Including the Part III being arranged in plug, described Part III is used for turning on Part I and Part II.
Further, also include high voltage device box and lid, described testing circuit is in series with micro-control switch, described micro-control
The two ends of switch are parallel with resistance, and described micro-control switch is used for detecting whether lid locks.
Further, described first control module and the second control module are entire car controller, battery management system, motor
Controller, DCDC or Vehicular charger.
Further, described high tension apparatus includes electric machine controller, battery bag, high voltage distribution box, Vehicular charger, air-conditioning
Or DCDC.
Further, described second control module includes partial pressure device, one end ground connection of described partial pressure device, partial pressure device
The other end be provided with test point, described test point is provided with detector unit, and detector unit is for monitoring the voltage of test point.
Further, described partial pressure device is resistance.
Further, entire car controller, described entire car controller and the electrical connection of the second control module, described car load are also included
Controller is for receiving the detection signal of the second control module, and according to the signal control battery bag of second controller detection is
No for high-tension electricity on high tension apparatus.
Present invention have the advantage that personnel easily get an electric shock when being different from existing high pressure monitoring device, again cannot
Confirm that the high tension apparatus that breaks down, where, is not taken off lid simultaneously and disconnected electricity when opening the lid of high voltage device box
The function on road, the high pressure monitoring device of the present invention, it is possible to judge whether break down, can also judge to break down simultaneously
High-pressure insert where so that technical staff can look for position to keep in repair accurately, but also will not get an electric shock
Danger.When opening the lid of high voltage device box, whole testing circuit is in the state of disconnection so that forget technical staff
In the case of connecting high-tension electricity when power-off or lid are not locked, reach lid and be in when opening the situation being in disconnecting, make
Situation about getting an electric shock must be not susceptible to, and then protect the life security of personnel.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the single high tension apparatus of high pressure monitoring device of electric automobile in the embodiment of the present invention；
Fig. 2 is the schematic diagram of the multiple high tension apparatus of high pressure monitoring device of electric automobile in the embodiment of the present invention；
Fig. 3 is the interlock circuit schematic diagram of embodiment of the present invention mesohigh connector；
Fig. 4 is micro-control switch schematic diagram in the embodiment of the present invention.
Description of reference numerals:
10, the first control module；
20, testing circuit；
21, high-voltage connector；
22, interlock circuit；
23, resistance；
24, microswitch；
30, the second control module；
31, high tension apparatus；
32, partial pressure device；
33, detector unit；
40, entire car controller；
211, socket；
212, plug；
221, Part I；
222, Part II；
223, Part III；
321, ground connection；
322, test point.
Detailed description of the invention
By describing the technology contents of the present invention, structural feature in detail, being realized purpose and effect, below in conjunction with embodiment
And coordinate accompanying drawing to be explained in detail.
Referring to Fig. 1, the present embodiment provides the high pressure monitoring device of a kind of electric automobile, including the first control module 10,
Testing circuit 20 and the second control module 30；
Testing circuit 20 includes the interlock circuit 22 of two or more high-voltage connector 21, and described interlock circuit is sequentially connected in series,
The two ends of each interlock circuit are parallel with the resistance 23 of different resistance；
Described first control module, testing circuit and the second control module are sequentially connected in series；
Described first control module is for testing circuit outputs level signals；
Described second control module is for the output voltage of testing circuit, and judges high-voltage device according to described output voltage
Part 31 connects the position whether fault and fault occur.
Technical scheme is sent continual and steady level signal by the first control module to testing circuit, and level is believed
Number magnitude of voltage be U, and level signal after by whole testing circuit to the second control module, the second control module according to
Described output voltage judges that high tension apparatus connects the position whether fault and fault occur.At testing circuit mesohigh device root
Multiple interlock circuit can be had, as it is shown in figure 1, there are two interlock circuits in a high tension apparatus according to interface, naturally it is also possible to
Demand according to different high tension apparatus or according to technical staff arranges multiple interlock circuit.As in figure 2 it is shown, at testing circuit
The interlock circuit of the multiple high tension apparatus of middle series connection detects.So there being plural high-voltage connector in testing circuit
Interlock circuit, and each interlock circuit is sequentially connected in series, and the two ends of the most each interlock circuit are parallel with the resistance of different resistance,
The two ends of interlock circuit are off, and have two elements, comprise the two of interlock circuit in an element in high-voltage connector
End, another element has the coupling part connecting the two ends disconnected, and two elements are combined together the two ends so that interlock circuit
Conducting, simultaneously one interlock circuit of the two element composition.Two interlocking electricity it are in series with for convenience of description in testing circuit
Road, is parallel with the resistance of two different resistances simultaneously, when the high tension apparatus of one of them interlock circuit connects and breaks down, and phase
When disconnecting in interlock circuit, then the level signal of the first control module then can be passed through via on resistance in parallel, then by the
The output voltage of the testing circuit of two control modules, and then judge that the connection of which high tension apparatus of testing circuit occurs event
Barrier, when in like manner the high tension apparatus connection of another interlock circuit is broken down, it is also possible to detect inspection according to the second control module
The magnitude of voltage of the output voltage of slowdown monitoring circuit, and then judge that the connection of which high tension apparatus of testing circuit is broken down, due to
Resistance in parallel on interlock circuit is different, so the magnitude of voltage detected is the most different, and then can judge accurately
Which the high voltage device broken down is, and the position of this high voltage device is where.If in like manner two interlock circuits
High voltage device connection is broken down, it is also possible to detect the magnitude of voltage of the output voltage of testing circuit according to the second control module,
Judge that the high voltage device of two interlock circuits connects according to magnitude of voltage to break down.If being in series with three on testing circuit
Interlock circuit, the resistance being connected in parallel on each interlock circuit all differs, and does not haves the resistance phase of two of which resistance
Add the situation equal to the 3rd resistance, at the voltage of the output voltage detecting testing circuit according to the second control module
Whether value, carry out judging that the high voltage device of interlock circuit connects and break down, if breaking down, also may be used in its position broken down
Draw with the data according to the second control module detection, and then the position broken down is keeped in repair.The most no matter detect electricity
Road is in series with the interlock circuit of how many high-voltage connectors, and resistance simultaneously in parallel from each interlock circuit is different, and also
The resistance of connection does not haves identical situation, say, that the control that the resistance of its parallel connection can be artificial so that will not go out
The most identical situation, and then just can be judged by the magnitude of voltage that the second control module detects, from
And obtaining the position broken down so that it can be keeped in repair by technical staff.The most any interlock circuit
High tension apparatus connection is broken down, the magnitude of voltage that can be obtained by the second control module, and then judges that output voltage is sentenced
Broken height voltage device connects the position whether fault and fault occur.So high tension apparatus is connected in interlock circuit, then leads to
Cross the level signal that the first control module output is continual and steady, and then the voltage obtained by the second control module, thus judge
It has output voltage and judge that high tension apparatus connects the position whether fault and fault occur so that technical staff can accurately find
The high tension apparatus broken down, and high tension apparatus is keeped in repair, and then the risk that the personnel that avoid get an electric shock and die.
Referring to Fig. 2, high-voltage connector 21 described in the technical program includes socket 211 and plug 212, and described high pressure patches
The interlock circuit 22 of part includes Part I 221 and the Part II 222 being arranged in socket, described Part I and second
Disjunction is offered and is put, and described interlock circuit also includes the Part III 223 being arranged in plug, and described Part III is for conducting the
A part and Part II.When plug is connected with socket, one end of Part III connects and Part I, Part III another
One end is connected with Part II so that Part I and Part II are turned on by Part III, when plug with socket for being connected
Or connect when breaking down, Part III also will not make Part I turn on Part II.The interlocking electricity of high-voltage connector
Road can be also the interlock mode of micro-control switch so that when socket and plug connect, and micro-control switch closes, when socket and plug not
When connection or connection are broken down, micro-control switch disconnects, and then forms interlocking so that when connection is broken down, by second
The detection of control module, draws the position broken down, and provides convenience for detection.
The technical program also includes high voltage device box and lid, refers to Fig. 3, is in series with micro-control in described testing circuit 20
Switch 24, the two ends of described micro-control switch are parallel with resistance 23, and described micro-control switch is used for detecting whether lid locks.High pressure unit
Part box is for filling high tension apparatus, simultaneously a micro-control switch, the micro-control when lid is closed and locked in series connection in testing circuit
Switch also closes, and when lid is opened, micro-control switch then disconnects, and then makes personnel that electric shock will not occur when opening the lid
Dangerous.Also being parallel with resistance at the two ends of micro-control switch, the resistance of resistance is different from resistance in parallel on interlock circuit, with
Time be also satisfied parallel connection resistance do not have identical situation, say, that the resistance of its parallel connection can with manual control,
Make not have the most identical situation, this ensure that the resistance resistance that the interlock circuit in testing circuit is in parallel
Value does not haves identical so that when the second control module detection, can detect whether to break down, simultaneously can also be accurately
Judge the position broken down, protect human life's safety, the most also provide bigger facility for maintenance.
First control module described in the technical program and the second control module are entire car controller, battery management system, electricity
Machine controller, DCDC or Vehicular charger.Described first control module can be entire car controller, and the second control module can be
Battery management system, or the first control module is electric machine controller, and the second control module is Vehicular charger.Make the first control
Molding block can export stable level signal, the second control module can the output voltage of testing circuit, and according to described
Output voltage judges that high tension apparatus connects the position whether fault and fault occur.
High tension apparatus described in the technical program includes electric machine controller, battery bag, high voltage distribution box, Vehicular charger, sky
Adjust or DCDC.Containing interlock circuit in high tension apparatus, through the level signal of the first control module output, in the second control module
The output voltage of upper testing circuit, and then judge whether breaking down of high tension apparatus according to voltage, and then make high-voltage device
Part can be properly functioning, also protect high tension apparatus and be difficult to be burnt by high-tension electricity.
Described in the technical program, the second control module 30 includes partial pressure device 32, one end ground connection 321 of described partial pressure device,
Described partial pressure device is resistance, and the other end of partial pressure device is provided with test point 322, and described test point is provided with detector unit
33, detector unit is for monitoring the voltage of test point.Partial pressure device ground connection makes whole piece circuit have the ginseng of a line voltage distribution
Examination point, and the other end of partial pressure device arranges test point, detects so that detector unit is simpler when detecting voltage.
By partial pressure device dividing potential drop, the second control module is by the detector unit detection voltage on test point, when partial pressure device is resistance,
The resistance of resistance can arbitrarily set so that convenient draws the position broken down in testing circuit.For the ease of saying
Bright arranging four interlock circuits in testing circuit, four interlock circuits are all parallel with the resistance of different resistance, concurrently set also
The resistance of the resistance being associated on interlock circuit does not haves identical situation, make interlock circuit be followed successively by the first interlock circuit,
Second interlock circuit, the 3rd interlock circuit and the 4th interlock circuit, resistance simultaneously the most in parallel with interlock circuit be followed successively by R1,
R2, R3 and R4, when interlock circuit does not breaks down, the resistance in parallel with interlock circuit is in the state of short circuit, when only the
When one interlock circuit breaks down, the resistance in parallel with the first interlock circuit is not shorted, the first control module the electricity sent
Ordinary mail number, the magnitude of voltage of level signal is U, when by whole testing circuit to the second control module, the second control module meeting
The magnitude of voltage obtained is that the magnitude of voltage that R1 U/ (R1+R5), the magnitude of voltage now obtained and the first control module send is different, because of
This may determine that testing circuit breaks down, the magnitude of voltage simultaneously obtained according to the second control module, is being combined in interlocking electricity
The resistance of resistance in parallel on road, and then judge the position broken down.With only having not being seated of the second interlock circuit
Time, the magnitude of voltage that the second control module can obtain is R2 U/ (R2+R5).With should the first plug-in unit and the second plug-in unit all not be seated
Time, the magnitude of voltage that now the second control module can obtain is (R1+R2) U/ (R1+R2+R5), the most any interlocking
The high tension apparatus connection of circuit is broken down, the magnitude of voltage that can be obtained by the second control module, and then judges output
Voltage judges that high tension apparatus connects the position whether fault and fault occur.Interlock circuit is so set in high tension apparatus,
Again by the level signal that the first control module output is continual and steady, and then the voltage obtained by the second control module, thus
Judge that output voltage judges that high tension apparatus connects the position whether fault and fault occur so that technical staff can be accurate
Find the high tension apparatus broken down, and high tension apparatus is keeped in repair, and then the risk that the personnel that avoid get an electric shock and die.
The technical program also includes entire car controller 40, described entire car controller and the electrical connection of the second control module, described
Entire car controller is for receiving the detection signal of the second control module, and controls battery according to the signal of second controller detection
Whether bag is high-tension electricity on high tension apparatus.After the second control module judges that testing circuit does not breaks down, entire car controller
Can receive and allow battery bag is the signal of high-tension electricity on high tension apparatus, and then is that high tension apparatus connects high-tension electricity according to signal, makes
Obtain high tension apparatus properly functioning.When the second control module judges that testing circuit breaks down, entire car controller will receive
To not allowing battery bag be the signal of high-tension electricity on high tension apparatus, so do not allow according to signal battery bag be high tension apparatus connect high pressure
Electricity, and then protect whole high tension apparatus, also avoid personnel to have the danger of electric shock.
The foregoing is only embodiments of the invention, not thereby limit the scope of patent protection of the present invention, every utilization
Equivalent structure or equivalence flow process that description of the invention and accompanying drawing content are made convert, or it is relevant to be directly or indirectly used in other
Technical field, be the most in like manner included in the scope of patent protection of the present invention.
Claims (8)
1. the high pressure monitoring device of an electric automobile, it is characterised in that include the first control module, testing circuit and the second control
Molding block；
Testing circuit includes that the interlock circuit of two or more high-voltage connector, described interlock circuit are sequentially connected in series, each interlocking electricity
The two ends on road are parallel with the resistance of different resistance；
Described first control module, testing circuit and the second control module are sequentially connected in series；
Described first control module is for testing circuit outputs level signals；
Described second control module is for the output voltage of testing circuit, and judges that high tension apparatus is even according to described output voltage
Connect the position whether fault and fault occur.
The high pressure monitoring device of electric automobile the most according to claim 1, it is characterised in that described high-voltage connector includes
Socket and plug, the interlock circuit of described high-voltage connector includes Part I and the Part II being arranged in socket, described
Part I and Part II disconnect and arranging, and described interlock circuit also includes the Part III being arranged in plug, and the described 3rd
Part is used for turning on Part I and Part II.
The high pressure monitoring device of electric automobile the most according to claim 1, it is characterised in that also include high voltage device box and
Lid, is in series with micro-control switch in described testing circuit, the two ends of described micro-control switch are parallel with resistance, and described micro-control switch is used
Whether lock in detection lid.
The high pressure monitoring device of electric automobile the most according to claim 1, it is characterised in that described first control module and
Second control module is entire car controller, battery management system, electric machine controller, DCDC or Vehicular charger.
The high pressure monitoring device of electric automobile the most according to claim 1, it is characterised in that described high tension apparatus includes electricity
Machine controller, battery bag, high voltage distribution box, Vehicular charger, air-conditioning or DCDC.
The high pressure monitoring device of electric automobile the most according to claim 1, it is characterised in that described second control module bag
Including partial pressure device, one end ground connection of described partial pressure device, the other end of partial pressure device is provided with test point, and described test point is arranged
Having detector unit, detector unit is for monitoring the voltage of test point.
The high pressure monitoring device of electric automobile the most according to claim 6, it is characterised in that described partial pressure device is electricity
Resistance.
The high pressure monitoring device of electric automobile the most according to claim 1, it is characterised in that also include entire car controller,
Described entire car controller and the electrical connection of the second control module, described entire car controller is for receiving the detection letter of the second control module
Number, and control whether battery bag is high-tension electricity on high tension apparatus according to the signal of second controller detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610711753.2A CN106143161A (en) | 2016-08-24 | 2016-08-24 | A kind of high pressure monitoring device of electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610711753.2A CN106143161A (en) | 2016-08-24 | 2016-08-24 | A kind of high pressure monitoring device of electric automobile |
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| CN106143161A true CN106143161A (en) | 2016-11-23 |
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Family Applications (1)
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| CN201610711753.2A Pending CN106143161A (en) | 2016-08-24 | 2016-08-24 | A kind of high pressure monitoring device of electric automobile |
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Cited By (14)
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| CN106841897A (en) * | 2016-12-29 | 2017-06-13 | 滁州品之达电器科技有限公司 | A kind of electric vehicle high-tension apparatus connection detection circuit |
| CN106882052A (en) * | 2017-04-13 | 2017-06-23 | 深圳市瀚路新能源汽车有限公司 | High-voltage interlocking loop and high-voltage interlocking loop detector |
| CN107219437A (en) * | 2017-05-27 | 2017-09-29 | 北京新能源汽车股份有限公司 | High-voltage interlocking detection circuit, method, device and automobile |
| CN108466553A (en) * | 2018-03-31 | 2018-08-31 | 山东交通职业学院 | A kind of electric automobile high-voltage interlocking loop of multibreak monitoring |
| CN108482127A (en) * | 2018-03-31 | 2018-09-04 | 山东交通职业学院 | A kind of electric automobile high-voltage interlocking loop and breaking localization method |
| CN108732449A (en) * | 2017-04-25 | 2018-11-02 | 上海汽车集团股份有限公司 | High-voltage interlocking circuit and its fault detection method |
| DE102017208640A1 (en) * | 2017-05-22 | 2018-11-22 | Audi Ag | Electrical circuit with a monitoring device |
| CN108872729A (en) * | 2018-03-27 | 2018-11-23 | 智车优行科技（上海）有限公司 | Vehicle high voltage system test device and method |
| CN109435693A (en) * | 2018-10-11 | 2019-03-08 | 恒大法拉第未来智能汽车（广东）有限公司 | Electric automobile insulation failure monitoring method and device |
| CN110221154A (en) * | 2018-03-02 | 2019-09-10 | 联合汽车电子有限公司 | High-voltage interlocking device broken circuit detecting system and broken circuit detecting method |
| CN112193118A (en) * | 2020-09-25 | 2021-01-08 | 深圳市德塔工业智能电动汽车有限公司 | Quick-change system for automobile battery |
| CN112428824A (en) * | 2020-12-03 | 2021-03-02 | 桑顿新能源科技有限公司 | High-voltage interlocking detection circuit, detection method of disconnection position and control unit |
| CN113866668A (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 detection method thereof |
| CN114156103A (en) * | 2020-09-08 | 2022-03-08 | 比亚迪股份有限公司 | Maintenance switch, control method of maintenance switch and electric automobile |
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| CN106841897A (en) * | 2016-12-29 | 2017-06-13 | 滁州品之达电器科技有限公司 | A kind of electric vehicle high-tension apparatus connection detection circuit |
| CN106882052B (en) * | 2017-04-13 | 2023-11-14 | 江苏苏缆电缆有限公司 | High-voltage interlocking loop and high-voltage interlocking loop detector |
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| CN110221154A (en) * | 2018-03-02 | 2019-09-10 | 联合汽车电子有限公司 | High-voltage interlocking device broken circuit detecting system and broken circuit detecting method |
| CN108872729A (en) * | 2018-03-27 | 2018-11-23 | 智车优行科技（上海）有限公司 | Vehicle high voltage system test device and method |
| CN108466553A (en) * | 2018-03-31 | 2018-08-31 | 山东交通职业学院 | A kind of electric automobile high-voltage interlocking loop of multibreak monitoring |
| CN108482127A (en) * | 2018-03-31 | 2018-09-04 | 山东交通职业学院 | A kind of electric automobile high-voltage interlocking loop and breaking localization method |
| CN109435693A (en) * | 2018-10-11 | 2019-03-08 | 恒大法拉第未来智能汽车（广东）有限公司 | Electric automobile insulation failure monitoring method and device |
| CN113866668A (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 detection method thereof |
| CN113866668B (en) * | 2020-06-12 | 2023-04-14 | 宁德时代新能源科技股份有限公司 | High-voltage interlocking circuit and detection method thereof |
| CN114156103A (en) * | 2020-09-08 | 2022-03-08 | 比亚迪股份有限公司 | Maintenance switch, control method of maintenance switch and electric automobile |
| CN114156103B (en) * | 2020-09-08 | 2023-03-14 | 比亚迪股份有限公司 | Maintenance switch, control method of maintenance switch and electric automobile |
| CN112193118A (en) * | 2020-09-25 | 2021-01-08 | 深圳市德塔工业智能电动汽车有限公司 | Quick-change system for automobile battery |
| CN112428824A (en) * | 2020-12-03 | 2021-03-02 | 桑顿新能源科技有限公司 | High-voltage interlocking detection circuit, detection method of disconnection position and control unit |
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