CN109693544B - High-voltage interlocking loop of electric automobile - Google Patents
High-voltage interlocking loop of electric automobile Download PDFInfo
- Publication number
- CN109693544B CN109693544B CN201910029425.8A CN201910029425A CN109693544B CN 109693544 B CN109693544 B CN 109693544B CN 201910029425 A CN201910029425 A CN 201910029425A CN 109693544 B CN109693544 B CN 109693544B
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- air conditioner
- contactor
- voltage interlocking
- voltage
- main
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- 238000012423 maintenance Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000005057 refrigeration Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- B60L3/04—Cutting off the power supply under fault conditions
-
- 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 invention discloses an electric automobile high-voltage interlocking loop, which comprises a main high-voltage interlocking loop and an air conditioner high-voltage interlocking loop connected with the high-voltage interlocking loop through a CAN bus; the main high-voltage interlocking circuit is provided with a main high-voltage interlocking switch, an air conditioner high-voltage interlocking switch and a first maintenance interlocking switch which are mutually connected in series; an air conditioner electric compressor interlocking switch, an air conditioner PTC heater interlocking switch and a second maintenance interlocking switch which are mutually connected in series are arranged on the air conditioner high-voltage interlocking loop; the invention has the advantages of simple circuit design, low cost and high safety.
Description
Technical Field
The invention relates to a high-voltage interlocking loop of an electric automobile.
Background
At present, a high-voltage interlocking loop is an important system for realizing high-voltage safety of an electric automobile. The interlocking switches are connected in series in the control circuit to form a loop, if more than one of the switches is disconnected, the controller can automatically cut off the high-voltage circuit, so that the safety is ensured. There are two types of interlock switches: the high-voltage component assembly is arranged at the positions of the high-voltage connector, the high-voltage assembly cover and the like, and under the normal working condition, the interlocking switch is closed, for example, when an operator pulls out the high-voltage connector or opens the high-voltage assembly cover under the condition of not breaking high voltage, a high-voltage loop can be automatically cut off; the other type is an interlocking switch for maintenance and detection, which is arranged near a relevant line and is convenient to operate, and when high-voltage power failure is needed, the interlocking switch can be directly pulled out under the condition of power failure so as to detect and maintain the vehicle. However, the existing mode is complex in design, high in cost and unable to guarantee safety.
Disclosure of Invention
The invention aims to provide a high-voltage interlocking loop of an electric automobile aiming at the defects existing in the prior art.
The invention adopts the following technical scheme to realize the aim: the high-voltage interlocking loop of the electric automobile comprises a main high-voltage interlocking loop and an air conditioner high-voltage interlocking loop which is connected with the high-voltage interlocking loop through a CAN bus; the main high-voltage interlocking circuit is provided with a main high-voltage interlocking switch, an air conditioner high-voltage interlocking switch and a first maintenance interlocking switch which are mutually connected in series; an air conditioner electric compressor interlocking switch, an air conditioner PTC heater interlocking switch and a second maintenance interlocking switch which are mutually connected in series are arranged on the air conditioner high-voltage interlocking loop;
the main high-voltage interlocking loop comprises a power battery component, and the positive electrode end of the power battery component is connected with the input end of the air conditioner high-voltage interlocking loop through a positive electrode contactor; the negative electrode end of the power battery assembly is connected with the output end of the air conditioner high-voltage interlocking loop through a negative electrode contactor;
the air conditioner high-voltage interlocking loop comprises a main contactor, a pre-charging resistor, a pre-charging contactor, an air conditioner electric compressor contactor and an air conditioner PTC heater contactor; the pre-charging resistor and the pre-charging contactor are connected in series and then connected in parallel with the main contactor; the input end of the main contactor is connected with the positive electrode contactor, the output end of the main contactor is connected with the control input end of the air conditioner electric compressor through the air conditioner electric compressor contactor, and the output end of the main contactor is connected with the control input end of the air conditioner PTC heater through the air conditioner PTC heater contactor.
The invention has the beneficial effects that: the invention has the advantages of simple circuit design, low cost and high safety.
Drawings
FIG. 1 is a schematic block diagram of a system of the present invention;
fig. 2 is a schematic diagram of the system control principle of the present invention.
Detailed Description
As shown in fig. 1, an electric automobile high-voltage interlocking loop is disclosed, which comprises a main high-voltage interlocking loop 10 and an air conditioner high-voltage interlocking loop 20 connected with the high-voltage interlocking loop 10 through a CAN bus; the main high-voltage interlocking loop 10 is provided with a main high-voltage interlocking switch 11, an air-conditioner high-voltage interlocking switch 12 and a first maintenance interlocking switch 13 which are mutually connected in series; the air conditioner high-voltage interlocking loop 20 is provided with an air conditioner electric compressor interlocking switch 21, an air conditioner PTC heater interlocking switch 22 and a second maintenance interlocking switch 23 which are mutually connected in series;
the main high-voltage interlocking loop 10 comprises a power battery assembly (a first power battery 3 and a second power battery 3 which are mutually connected in series in fig. 1), wherein the positive electrode end of the power battery assembly is connected with the input end of the air-conditioning high-voltage interlocking loop 20 through a positive electrode contactor 4; the negative electrode end of the power battery assembly is connected with the output end of the air conditioner high-voltage interlocking loop through a negative electrode contactor 1;
the air conditioner high-voltage interlocking loop 20 comprises a main contactor 5, a pre-charging resistor 6, a pre-charging contactor 7, an air conditioner electric compressor contactor 8 and an air conditioner PTC heater contactor 9; the pre-charging resistor 6 and the pre-charging contactor 7 are connected in series and then connected with the main contactor 5 in parallel; the input end of the main contactor 5 is connected with the positive electrode contactor 4, the output end of the main contactor 5 is connected with the control input end of the air conditioner electric compressor through the air conditioner electric compressor contactor 8, and the output end of the main contactor 5 is connected with the control input end of the air conditioner PTC heater through the air conditioner PTC heater contactor 9.
As shown in fig. 2, the control principle is as follows: because of the two high-voltage interlocking loops, the main high-voltage interlocking loop 10 and the air conditioner high-voltage interlocking loop 20 are arranged; the main high-voltage interlocking loop 10 controls the positive electrode contactor, the negative electrode contactor, the main contactor and the pre-charging contactor, and as long as 1 or more of the main high-voltage interlocking switch 11, the air conditioner high-voltage interlocking switch 12 and the first maintenance interlocking switch 13 are disconnected, the main high-voltage interlocking loop 10 controls the positive electrode contactor, the negative electrode contactor, the main contactor and the pre-charging contactor to be disconnected, the whole vehicle has no high voltage, and the electric vehicle cannot run on electricity, cannot charge, and the air conditioner refrigerating and heating system cannot work. The air conditioner high-voltage interlocking loop 20 controls the air conditioner electric compressor contactor and the air conditioner PTC heater contactor, and as long as 1 or more of the air conditioner electric compressor interlocking switch 21, the air conditioner PTC heater interlocking switch 22 and the second maintenance interlocking switch 23 are disconnected, the air conditioner high-voltage interlocking loop 20 controls the air conditioner electric compressor contactor and the air conditioner PTC heater contactor to be disconnected, and air conditioner refrigeration or heating cannot be started, but the electric automobile is not affected to power-on running and charging, and the instrument reports air conditioner high-voltage fault information, so that maintenance is needed as soon as possible.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (1)
1. A control method of a high-voltage interlocking loop of an electric automobile comprises a main high-voltage interlocking loop and an air conditioner high-voltage interlocking loop connected with the high-voltage interlocking loop through a CAN bus; the main high-voltage interlocking circuit is provided with a main high-voltage interlocking switch, an air conditioner high-voltage interlocking switch and a first maintenance interlocking switch which are mutually connected in series; an air conditioner electric compressor interlocking switch, an air conditioner PTC heater interlocking switch and a second maintenance interlocking switch which are mutually connected in series are arranged on the air conditioner high-voltage interlocking loop;
the main high-voltage interlocking loop comprises a power battery assembly, wherein the power battery assembly comprises a first power battery and a second power battery which are mutually connected in series, and the positive electrode end of the power battery assembly is connected with the input end of the air conditioner high-voltage interlocking loop through a positive electrode contactor; the negative electrode end of the power battery assembly is connected with the output end of the air conditioner high-voltage interlocking loop through a negative electrode contactor;
the air conditioner high-voltage interlocking loop comprises a main contactor, a pre-charging resistor, a pre-charging contactor, an air conditioner electric compressor contactor and an air conditioner PTC heater contactor; the pre-charging resistor and the pre-charging contactor are connected in series and then connected in parallel with the main contactor; the input end of the main contactor is connected with the positive electrode contactor, the output end of the main contactor is connected with the control input end of the air conditioner electric compressor through the air conditioner electric compressor contactor, and the output end of the main contactor is connected with the control input end of the air conditioner PTC heater through the air conditioner PTC heater contactor;
during control, the main high-voltage interlocking loop controls the positive electrode contactor, the negative electrode contactor, the main contactor and the pre-charging contactor, and as long as 1 or more of the main high-voltage interlocking switch, the air conditioner high-voltage interlocking switch and the first maintenance interlocking switch are disconnected, the main high-voltage interlocking loop controls the positive electrode contactor, the negative electrode contactor, the main contactor and the pre-charging contactor to be disconnected, the whole vehicle has no high voltage, and the electric vehicle cannot run on power, cannot charge, and the air conditioner refrigerating and heating system cannot work;
the air conditioner high-voltage interlocking loop controls the air conditioner electric compressor contactor and the air conditioner PTC heater contactor, and as long as 1 or more of the air conditioner electric compressor interlocking switch, the air conditioner PTC heater interlocking switch and the second maintenance interlocking switch are disconnected, the air conditioner high-voltage interlocking loop controls the air conditioner electric compressor contactor and the air conditioner PTC heater contactor to be disconnected, so that air conditioner refrigeration or heating cannot be started, the electric automobile is not affected to power on, running and charging, and the instrument reports air conditioner high-voltage fault information, so that maintenance is needed as soon as possible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910029425.8A CN109693544B (en) | 2019-01-13 | 2019-01-13 | High-voltage interlocking loop of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910029425.8A CN109693544B (en) | 2019-01-13 | 2019-01-13 | High-voltage interlocking loop of electric automobile |
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| Publication Number | Publication Date |
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| CN109693544A CN109693544A (en) | 2019-04-30 |
| CN109693544B true CN109693544B (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910029425.8A Active CN109693544B (en) | 2019-01-13 | 2019-01-13 | High-voltage interlocking loop of electric automobile |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11642967B2 (en) | 2020-07-27 | 2023-05-09 | Caterpillar Inc. | Independent high voltage interlocking loop systems |
| DE202022105314U1 (en) * | 2022-09-21 | 2024-01-03 | Liebherr-Werk Nenzing Gmbh | Working machine with electric drive |
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| CN109693544A (en) | 2019-04-30 |
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