CN110758058A - PTC multiple over-temperature protection system of electric automobile - Google Patents
PTC multiple over-temperature protection system of electric automobile Download PDFInfo
- Publication number
- CN110758058A CN110758058A CN201911190981.XA CN201911190981A CN110758058A CN 110758058 A CN110758058 A CN 110758058A CN 201911190981 A CN201911190981 A CN 201911190981A CN 110758058 A CN110758058 A CN 110758058A
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- China
- Prior art keywords
- ptc
- blower
- protection system
- switch
- heating core
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- 238000010438 heat treatment Methods 0.000 claims abstract description 44
- 238000004378 air conditioning Methods 0.000 claims description 20
- 238000013021 overheating Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
- B60H1/00514—Details of air conditioning housings
- B60H1/00521—Mounting or fastening of components in housings, e.g. heat exchangers, fans, electronic regulators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H1/2215—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters
- B60H1/2218—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters controlling the operation of electric heaters
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention provides a PTC multiple over-temperature protection system of an electric vehicle, which is characterized by comprising a PTC heating core body and a vehicle control unit, wherein the vehicle control unit comprises a PTC control signal input end and a PTC control signal output end; the low-voltage power supply is electrically connected with the PTC control signal input end through the blower switch and the PTC request switch, and the PTC control signal output end is electrically connected with the high-voltage relay; and the high-voltage power supply supplies power to the PTC heating core body through the high-voltage relay. The invention aims to provide a PTC multiple over-temperature protection system of an electric automobile aiming at the defects of the prior art, so that the overheating risk of a PTC core body is reduced, and the safety of the use of the automobile is guaranteed.
Description
Technical Field
The invention relates to the technical field of electric vehicles, in particular to a PTC multiple over-temperature protection system for an electric vehicle.
Background
At present, a warm air system of an electric automobile adopts an electric PTC core body for heating. The PTC core body is heated by water and air according to different heat transfer media. The air heating PTC has small change to a warm air system on the basis of the traditional fuel vehicle, can meet the use requirement of the system only by directly replacing a water heating core of the fuel vehicle with the PTC core, and is widely used in the field of electric vehicles at present. However, the PTC core has an overheating risk relative to the water heating core, and the temperature of the PTC core may exceed the tolerance limit of the HVAC housing, so that the HVAC housing is damaged, and even a vehicle is in fire, so that the air heating PTC is protected from overheating by adopting a temperature control switch. The temperature control switch has the condition that damage leads to protection inefficacy, makes the vehicle have certain safety risk.
Disclosure of Invention
The invention aims to provide a PTC multiple over-temperature protection system of an electric automobile aiming at the defects of the prior art, so that the overheating risk of a PTC core body is reduced, and the safety of the use of the automobile is guaranteed.
The invention provides a PTC multiple over-temperature protection system of an electric vehicle, which is characterized by comprising a PTC heating core body and a vehicle control unit, wherein the vehicle control unit comprises a PTC control signal input end and a PTC control signal output end; the low-voltage power supply is electrically connected with the PTC control signal input end through the blower switch and the PTC request switch, and the PTC control signal output end is electrically connected with the high-voltage relay; and the high-voltage power supply supplies power to the PTC heating core body through the high-voltage relay.
In the technical scheme, a first PTC temperature controller is connected in series between the blower switch and the PTC request switch.
In the technical scheme, a second PTC temperature controller is connected in series between the blower switch and the PTC request switch, and the first PTC temperature controller is connected in series with the second PTC temperature controller.
Among the above-mentioned technical scheme, the low voltage power supply supplies power for the air-blower through the air-blower switch, and it has a plurality of resistances to establish ties between air-blower and the air-blower switch, and the air-blower switch includes a plurality of gear ends, the one end of a plurality of resistances is connected with the gear end electricity that corresponds respectively.
In the above technical solution, the PTC heating core includes a PTC heating sheet and a heat sink; the first PTC temperature controller and the first PTC temperature controller are arranged on the PTC heating core body.
In the technical scheme, the PTC control output end is grounded through the resistor end of the high-voltage relay, and the high-voltage power supply supplies power to the PTC heating core body through the switch end of the high-voltage relay.
Among the above-mentioned technical scheme, embedded in the air conditioning system casing in the PTC heating core, air conditioner air door and PTC heating core set up relatively.
Among the above-mentioned technical scheme, still be provided with the air-blower in the air conditioning system casing, air-blower and PTC core are located the both sides of air conditioner air door respectively.
In the technical scheme, an air conditioning evaporator is further arranged in the air conditioning system shell and is arranged between the air blower and the air conditioning air door.
In the technical scheme, a fuse is connected in series between the blower and the resistor
The invention realizes 3-fold protection of PTC over-temperature through the PTC request switch, the two PTC temperature controllers and the blower switch which are connected in series at the signal input end in the vehicle controller. According to the invention, one temperature controller is added to serve as a control source for the PTC operation, so that the risk of PTC overheating caused by damage of a single temperature controller is avoided; meanwhile, a blower switch is added to serve as a control source for the PTC operation, the PTC can be turned on after the blower is forcibly required to be turned on by the system, the PTC is prevented from being burnt, and even if the temperature controller is damaged, the PTC is cooled by wind flow and cannot be overheated. In the refrigeration mode, the airflow to the PTC core body is not completely closed, and when the PTC request switch is turned on by mistake, the PTC cannot be dried and burnt and serves as the 4 th protection to the over-temperature of the PTC.
Drawings
FIG. 1 is a circuit schematic of the present invention;
FIG. 2 is a schematic structural view of the present invention;
the air conditioner comprises a PCT heating core body 1, an air door 2, an air conditioner adjusting system shell 3, an air conditioner evaporator 4 and an air blower 5.
Detailed Description
The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.
As shown in fig. 1, the invention provides a PTC multiple over-temperature protection system for an electric vehicle, which is characterized by comprising a PTC heating core and a vehicle control unit, wherein the vehicle control unit comprises a PTC control signal input end and a PTC control signal output end; the low-voltage power supply is electrically connected with the PTC control signal input end through the blower switch and the PTC request switch, and the PTC control signal output end is electrically connected with the high-voltage relay; and the high-voltage power supply supplies power to the PTC heating core body through the high-voltage relay.
And a first PTC temperature controller is connected in series between the blower switch and the PTC request switch. A second PTC temperature controller is connected in series between the blower switch and the PTC request switch, and the first PTC temperature controller is connected in series with the second PTC temperature controller, so that the PTC overheating risk caused by the damage of a single temperature controller is avoided.
The working process of the invention is as follows:
after the whole vehicle is electrified at high voltage, if heating and defrosting requirements exist, a PTC request switch is started;
starting a blower switch, and enabling the output current of the low-voltage power supply to be transmitted to a PTC control input end through the blower switch, the two temperature controllers and the PTC request switch; the vehicle control unit receives a PTC control input high effective signal; the PTC control output end outputs (high effective) voltage, the high-voltage relay is closed and conducted, the PTC heating core body works normally, otherwise, the PTC heating core body does not work;
in the PTC working process, the first PTC temperature controller and the second PTC temperature controller are conducted when the detection temperature is lower than the set temperature, the PTC heating core body works normally, otherwise, the PTC heating core body stops working;
in the PTC working process, one of the two PTC temperature controllers is damaged and is in a conduction state, the other PTC temperature controller is conducted when the detection temperature is lower than the set temperature, the PTC heating core body normally works, and otherwise, the PTC heating core body stops working.
Among the above-mentioned technical scheme, PTC heating core 1 is embedded in air conditioning system casing 3, and air conditioner air door 2 and PTC heating core 1 set up relatively. The air conditioning system shell 3 is also internally provided with a blower 5, and the blower 5 and the PTC core body 1 are respectively positioned at two sides of the air conditioning damper 2. An air conditioning evaporator 4 is also arranged in the air conditioning system shell 3 and is arranged between the air blower and the air conditioning air door.
After the whole vehicle is electrified at high voltage, if the refrigeration requirement exists, the air conditioner is started, and the blower 5 is in a working state at the moment; in the refrigeration mode, the air conditioning air door 5 is not completely closed, and airflow flows through the PTC heating core body 1; if the PTC switch is turned on by mistake at the moment, the PTC heating core body 1 works normally, but airflow flows through the PT heating core body 1, and the PTC heating core body 1 cannot be burnt dry, so that the PTC heating core body is overheated under the condition that the PCT temperature controller fails.
Among the above-mentioned technical scheme, the low voltage power supply supplies power for the air-blower through the air-blower switch, and it has a plurality of resistances to establish ties between air-blower and the air-blower, and the air-blower switch includes a plurality of gear ends, the one end of a plurality of resistances is connected with the gear end electricity that corresponds respectively. And the switch of the blower is switched to different gears to realize the switching of the wind speed.
In the above technical solution, the PTC heating core comprises a PTC heating sheet and a heat sink; the first PTC temperature controller and the first PTC temperature controller are arranged on the PTC heating core body, and real-time monitoring of the PTC heating core body is achieved.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
Claims (10)
1. A PTC multiple over-temperature protection system of an electric vehicle is characterized by comprising a PTC heating core body and a vehicle control unit, wherein the vehicle control unit comprises a PTC control signal input end and a PTC control signal output end; the low-voltage power supply is electrically connected with the PTC control signal input end through the blower switch and the PTC request switch, and the PTC control signal output end is electrically connected with the high-voltage relay; and the high-voltage power supply supplies power to the PTC heating core body through the high-voltage relay.
2. The multiple over-temperature protection system of PTC for electric vehicle of claim 1, wherein a first PTC temperature controller is connected in series between the blower switch and the PTC request switch.
3. The multiple over-temperature protection system of PTC for electric vehicle of claim 3, wherein a second PTC temperature controller is connected in series between the blower switch and the PTC request switch, and the first PTC temperature controller is connected in series with the second PTC temperature controller.
4. The multiple over-temperature protection system of electric automobile PTC according to claim 1, wherein the low voltage power supply supplies power to the blower via a blower switch, a plurality of resistors are connected in series between the blower and the blower switch, the blower switch comprises a plurality of gear ends, and one end of each of the plurality of resistors is electrically connected to the corresponding gear end.
5. The multiple PTC overheat protection system for an electric vehicle according to claim 1, wherein the PTC heating core comprises a PTC heating plate and a heat sink; the first PTC temperature controller and the first PTC temperature controller are arranged on the PTC heating core body.
6. The multiple over-temperature protection system of PTC for electric vehicle of claim 1, wherein the PTC control output terminal is grounded through the resistor terminal of the high voltage relay, and the high voltage power supply supplies power to the PTC heating core through the switch terminal of the high voltage relay.
7. The multiple excess temperature protection system of batteries of electric vehicles of claim 1, wherein the PTC heating core is embedded in the air conditioning system housing, and the air conditioning damper and the PTC heating core are disposed opposite to each other.
8. The multiple over-temperature protection system of PTC for electric vehicle of claim 7, wherein the air conditioning system housing further comprises a blower, the blower and the PTC core are respectively located at two sides of the air conditioning damper.
9. The multiple PTC overheat protection system for an electric vehicle according to claim 8, wherein an air conditioning evaporator is further disposed in the air conditioning system housing, and the air conditioning evaporator is disposed between the blower and the air conditioning damper.
10. The multiple over-temperature protection system of PTC for electric vehicle of claim 4, wherein a fuse is connected in series between the blower and the resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911190981.XA CN110758058A (en) | 2019-11-28 | 2019-11-28 | PTC multiple over-temperature protection system of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911190981.XA CN110758058A (en) | 2019-11-28 | 2019-11-28 | PTC multiple over-temperature protection system of electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110758058A true CN110758058A (en) | 2020-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911190981.XA Pending CN110758058A (en) | 2019-11-28 | 2019-11-28 | PTC multiple over-temperature protection system of electric automobile |
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| Country | Link |
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| CN (1) | CN110758058A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201205858Y (en) * | 2007-12-27 | 2009-03-11 | 奇瑞汽车股份有限公司 | Heating ventilation and air conditioning system |
| CN104260616A (en) * | 2014-10-24 | 2015-01-07 | 北京长安汽车工程技术研究有限责任公司 | Electric automobile heating system and method |
| CN204432298U (en) * | 2014-12-26 | 2015-07-01 | 陕西汽车集团有限责任公司 | Air conditioning system for electric car |
| CN206734006U (en) * | 2017-05-16 | 2017-12-12 | 四川江淮汽车有限公司 | A kind of electric automobile air conditioner PTC heating systems for realizing two overheat protection |
| CN206734010U (en) * | 2017-05-16 | 2017-12-12 | 四川江淮汽车有限公司 | A kind of electric automobile air conditioner PTC heating systems of high security |
| CN110271384A (en) * | 2019-06-11 | 2019-09-24 | 东风汽车股份有限公司 | pure electric vehicle air conditioner control system and method |
| CN211808917U (en) * | 2019-11-28 | 2020-10-30 | 东风商用车有限公司 | PTC multiple over-temperature protection system of electric automobile |
-
2019
- 2019-11-28 CN CN201911190981.XA patent/CN110758058A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201205858Y (en) * | 2007-12-27 | 2009-03-11 | 奇瑞汽车股份有限公司 | Heating ventilation and air conditioning system |
| CN104260616A (en) * | 2014-10-24 | 2015-01-07 | 北京长安汽车工程技术研究有限责任公司 | Electric automobile heating system and method |
| CN204432298U (en) * | 2014-12-26 | 2015-07-01 | 陕西汽车集团有限责任公司 | Air conditioning system for electric car |
| CN206734006U (en) * | 2017-05-16 | 2017-12-12 | 四川江淮汽车有限公司 | A kind of electric automobile air conditioner PTC heating systems for realizing two overheat protection |
| CN206734010U (en) * | 2017-05-16 | 2017-12-12 | 四川江淮汽车有限公司 | A kind of electric automobile air conditioner PTC heating systems of high security |
| CN110271384A (en) * | 2019-06-11 | 2019-09-24 | 东风汽车股份有限公司 | pure electric vehicle air conditioner control system and method |
| CN211808917U (en) * | 2019-11-28 | 2020-10-30 | 东风商用车有限公司 | PTC multiple over-temperature protection system of electric automobile |
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