CN113665429B - New energy automobile high-temperature high-humidity control system and control method - Google Patents
New energy automobile high-temperature high-humidity control system and control method Download PDFInfo
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- CN113665429B CN113665429B CN202111075118.7A CN202111075118A CN113665429B CN 113665429 B CN113665429 B CN 113665429B CN 202111075118 A CN202111075118 A CN 202111075118A CN 113665429 B CN113665429 B CN 113665429B
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
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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
- B60L2260/00—Operating Modes
- B60L2260/40—Control modes
- B60L2260/44—Control modes by parameter estimation
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a high-temperature high-humidity control system and a control method for a new energy automobile, and the system comprises a humidity sensor and a temperature sensor, wherein the humidity sensor and the temperature sensor are connected with the input end of a vehicle control unit, the output end of the vehicle control unit is respectively connected with the input end of a thermal management system and the input end of a motor controller, the output end of the thermal management system is connected with a battery box, the output end of the motor controller is connected with a motor, the input end of the motor controller is connected with a power battery pack, the output positive electrode and the output negative electrode of the power battery pack are respectively connected with an insulation detector, the temperature and the relative humidity of the battery box are read through the temperature sensor and the humidity sensor, the vehicle control unit obtains corresponding dew point temperature information through the temperature and the humidity information, and then the vehicle control unit calculates the target temperature of the thermal management system through the dew point temperature and the allowable working temperature of a battery, so as to realize the control of the temperature and the humidity of the battery box.
Description
Technical Field
The invention relates to the technical field of new energy automobile control, in particular to a high-temperature high-humidity control system and a control method for a new energy automobile.
Background
The influence of environmental factors on the power battery pack and the single battery and the module inside the power battery pack not only comprises the thermal unbalance of the battery module caused by temperature, but also comprises the influence generated by moisture in the air and the temperature-humidity coupling effect inside the battery pack. The new energy automobile battery pack is additionally provided with a pressure relief ventilating device for balancing the pressure difference between the inside and the outside and preventing liquid from entering, and in use and maintenance, the functional design and reliability of the new energy automobile battery pack are problematic.
Disclosure of Invention
The invention aims to provide a high-temperature high-humidity control system and a control method for a new energy automobile.
The purpose of the invention can be realized by the following technical scheme:
a high-temperature high-humidity control system of a new energy automobile comprises a humidity sensor and a temperature sensor, wherein the humidity sensor and the temperature sensor are connected with the input end of a vehicle controller;
the input end of the motor controller is connected with the power battery pack, and the output positive electrode and the output negative electrode of the power battery pack are respectively connected with the insulation detector.
As a further scheme of the invention: the temperature sensor is connected with the vehicle control unit through a hard wire, and the temperature value is acquired by the vehicle control unit.
As a further scheme of the invention: the humidity sensor is connected with the vehicle control unit through a hard line, and the humidity value is collected by the vehicle control unit.
As a further scheme of the invention: and data are transmitted among the vehicle control unit, the thermal management system, the motor controller and the insulation detector through a CAN bus.
The control method of the high temperature and high humidity control system of the new energy automobile comprises the following steps:
the method comprises the following steps: the vehicle control unit reads humidity and temperature information;
step two: the whole vehicle controller calculates the dew point temperature according to the humidity and temperature information;
step three: the whole vehicle controller compares the dew point temperature with the allowable working temperature interval of the battery to obtain the control target temperature of the high-temperature high-humidity system;
step four: the vehicle control unit sends the control target temperature to a heat management system through a CAN network, the heat management system heats or refrigerates, and the temperature of the battery box is controlled to be close to the target temperature;
step five: the vehicle control unit simultaneously acquires insulation information, when the humidity control fails, the humidity is continuously increased, and when the temperature of the battery box is lower than the dew point temperature, the humidity insulation protection is started;
step six: after the humidity insulation protection is started, the vehicle control unit realizes protection by limiting the output power of the electric drive system, and if the insulation value during protection is reduced to be lower than the early warning threshold value, the vehicle control unit limits the electric drive output.
As a further scheme of the invention: calculating the control target temperature of the high-temperature high-humidity system in the third step:
s: when the dew point temperature is lower than the minimum allowable temperature of the battery, the target temperature is equal to the optimal efficiency temperature of the battery;
s: when the dew point temperature is between the allowable temperatures of the battery, the target temperature is the temperature with highest efficiency between the dew point temperature and the allowable maximum temperature;
s: and if the dew point temperature is higher than the maximum allowable working temperature, the system starts humidity insulation protection.
As a further scheme of the invention: and fifthly, the humidity insulation protection mode is that the power is limited by a humidity insulation primary fault, the output of a humidity insulation secondary fault is stopped, and the high voltage is cut off by a humidity insulation tertiary fault.
As a further scheme of the invention: and fifthly, the humidity control failure means that when the dew point temperature is higher than the maximum allowable temperature of the battery, the thermal management system fails, and the humidity cannot be adjusted.
As a further scheme of the invention: the humidity insulation protection mode needs to judge the humidity value when in action.
The invention has the beneficial effects that:
the temperature and the relative humidity of the battery box are read by the temperature sensor and the humidity sensor, the whole vehicle controller obtains corresponding dew point temperature information according to the temperature and the humidity information, the target temperature of the thermal management system is calculated by the whole vehicle controller according to the dew point temperature and the allowable working temperature of the battery, the temperature and the humidity of the battery box are controlled, the insulation value of the high-voltage system is collected, the output of the electric drive system is limited by the insulation protection threshold value, and the protection when the humidity control fails is finished.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a system block diagram of the present invention;
fig. 2 is a flow chart of the control method of the present invention.
In the figure: 1. a humidity sensor; 2. a temperature sensor; 3. a vehicle control unit; 4. a thermal management system; 5. a battery box; 6. a motor controller; 7. a motor; 8. a power battery pack; 9. a vehicle body; 10. an insulation detector.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the invention relates to a high-temperature and high-humidity control system of a new energy automobile, which comprises a temperature sensor 1 and a humidity sensor 2, wherein the temperature sensor 1 converts temperature information into an electric signal, the humidity sensor 2 converts a humidity signal into an electric signal, the temperature sensor 1 and the humidity sensor 2 are connected with an input end of a vehicle controller 3, an output end of the vehicle controller 3 is respectively connected with an input end of a thermal management system 4 and an input end of a motor controller 6, the thermal management system 4 is used for adjusting the temperature of a battery box 5, an output end of the thermal management system 4 is connected with the battery box 5, an output end of the motor controller 6 is connected with a motor 7, an input end of the motor controller 6 is connected with a power battery pack 8, the power battery pack 8 is composed of a plurality of battery boxes 5, an insulation detector 10 detects the insulation value of a power high-voltage system, and the insulation detector 10 respectively connects the output positive and negative poles of the power battery pack 8 with a vehicle body 9.
And data are transmitted among the vehicle control unit 3, the thermal management system 4, the motor controller 6 and the insulation detector 10 through a CAN bus.
As shown in fig. 2, the control method of the high-temperature high-humidity control system of the new energy automobile comprises the following steps:
the method comprises the following steps: the vehicle control unit 3 reads humidity and temperature information;
step two: the vehicle control unit 3 calculates the dew point temperature according to the humidity and temperature information
Step three: the vehicle control unit 3 compares the dew point temperature with the allowable working temperature interval of the battery to obtain the control target temperature of the high-temperature high-humidity system;
step four: the vehicle control unit 3 sends the control target temperature to the thermal management system 4 through the CAN network, the thermal management system 4 heats or refrigerates, and the temperature of the battery box 5 is controlled to be close to the target temperature;
step five: the vehicle control unit 3 simultaneously acquires insulation information, when the humidity control fails, the humidity is continuously increased, and when the temperature of the battery box 5 is lower than the dew point temperature, the humidity insulation protection is started;
step six: after the humidity insulation protection is started, the vehicle control unit 3 realizes protection by limiting the output power of the electric drive system, and if the insulation value during protection is reduced below the early warning threshold value, the vehicle control unit 3 limits the electric drive output.
The specific method comprises the following steps:
a temperature sensor 2 and a humidity sensor 1 are installed in a battery box 5, the temperature sensor 2 detects the temperature in the battery box 5, the humidity sensor 1 detects the humidity in the battery box 5, and the humidity sensor 1 and the temperature sensor 2 respectively convert temperature and humidity information into electric signals which can be collected by a vehicle control unit 3; the vehicle control unit 3 acquires temperature and humidity information and calculates dew point temperature;
comparing the dew point temperature with the temperature interval of the battery allowed to work, and controlling the target temperature to be equal to the optimal efficiency temperature of the battery when the dew point temperature is lower than the minimum temperature allowed by the battery;
when the dew point temperature is between the allowable temperatures of the battery, the control target temperature is the temperature with highest efficiency between the dew point temperature and the allowable maximum temperature;
if the dew point temperature is higher than the maximum allowable working temperature, the system starts humidity insulation protection;
the vehicle control unit 3 sends the temperature of the control target to the heat management system 4 through the CAN network; the thermal management system 4 adjusts the temperature according to the control target temperature;
when the target temperature is lower than the current temperature of the battery box 5, a condenser is started to cool;
when the target temperature is higher than the current temperature of the battery box 5, a heating device is started to heat up;
when the humidity insulation protection is started, the vehicle control unit 3 continuously acquires the insulation resistance value between the high-voltage system of the power battery pack 8 and the vehicle body 9 through the CAN network;
when the reduction rate of the insulation resistance value is increased and the insulation resistance value is lower than a set value, and the humidity value is larger than the set value, protection control is performed through the motor controller 6;
the humidity insulation protection is divided into three levels, the humidity insulation primary fault limits power, the humidity insulation secondary fault stops output, and the humidity insulation tertiary fault cuts off high voltage.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. A control method of a high-temperature high-humidity control system of a new energy automobile is characterized by comprising the following steps:
the method comprises the following steps: the whole vehicle controller (3) reads humidity and temperature information;
step two: the whole vehicle controller (3) calculates the dew point temperature according to the humidity and temperature information;
step three: the whole vehicle controller (3) compares the dew point temperature with the allowable working temperature interval of the battery to obtain the control target temperature of the high-temperature high-humidity system;
step four: the vehicle control unit (3) sends the control target temperature to the heat management system (4) through the CAN network, the heat management system (4) heats or refrigerates, and the temperature of the battery box (5) is controlled to be close to the target temperature;
step five: the vehicle control unit (3) collects insulation information at the same time, when the humidity control fails, the humidity is continuously increased, and when the temperature of the battery box (5) is lower than the dew point temperature, the humidity insulation protection is started;
step six: after the humidity insulation protection is started, the vehicle control unit (3) realizes protection by limiting the output power of the electric drive system, and if the insulation value during protection is reduced below an early warning threshold value, the vehicle control unit (3) limits the electric drive output;
calculating the control target temperature of the high-temperature high-humidity system in the third step:
s1: when the dew point temperature is lower than the minimum allowable temperature of the battery, the target temperature is equal to the optimal efficiency temperature of the battery;
s2: when the dew point temperature is between the allowable temperatures of the battery, taking the temperature with the highest efficiency between the dew point temperature and the allowable maximum temperature as the target temperature;
s3: if the dew point temperature is higher than the maximum allowable working temperature, the system starts humidity insulation protection;
the humidity sensor (1) and the temperature sensor (2) are connected with the input end of a vehicle control unit (3), the output end of the vehicle control unit (3) is respectively connected with the input end of a thermal management system (4) and the input end of a motor controller (6), the output end of the thermal management system (4) is connected with a battery box (5), and the output end of the motor controller (6) is connected with a motor (7);
the input end of the motor controller (6) is connected with the power battery pack (8), and the output positive and negative poles of the power battery pack (8) are respectively connected with the insulation detector (10).
2. The control method of the new energy automobile high-temperature high-humidity control system according to claim 1, characterized in that the temperature sensor (2) is connected with the vehicle controller (3) through a hard wire, and the temperature value is acquired by the vehicle controller (3).
3. The control method of the high-temperature high-humidity control system of the new energy automobile according to claim 1, characterized in that the humidity sensor (1) is connected with the vehicle controller (3) through a hard wire, and the humidity value is acquired by the vehicle controller (3).
4. The control method of the new energy automobile high-temperature high-humidity control system according to claim 1, characterized in that data are transmitted between the vehicle control unit (3) and the thermal management system (4), the motor controller (6) and the insulation detector (10) through a CAN bus.
5. The control method of the high-temperature high-humidity control system of the new energy automobile according to claim 1, wherein in the fifth step, the humidity insulation protection mode is a humidity insulation primary fault power limit mode, a humidity insulation secondary fault output stop mode, and a humidity insulation tertiary fault high-voltage cut-off mode.
6. The control method of the new energy automobile high temperature and high humidity control system according to claim 1, wherein in the fifth step, the humidity control failure is that when the dew point temperature is higher than the maximum temperature allowed by the battery, the thermal management system (4) fails, and the humidity cannot be adjusted.
7. The control method of the new energy automobile high temperature and high humidity control system according to claim 1, wherein the humidity insulation protection mode needs to judge the humidity value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111075118.7A CN113665429B (en) | 2021-09-14 | 2021-09-14 | New energy automobile high-temperature high-humidity control system and control method |
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| CN202111075118.7A CN113665429B (en) | 2021-09-14 | 2021-09-14 | New energy automobile high-temperature high-humidity control system and control method |
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| CN113665429B true CN113665429B (en) | 2023-01-24 |
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| CN118157544A (en) * | 2022-12-06 | 2024-06-07 | 蔚来动力科技(合肥)有限公司 | Controlling humidity in a cavity in which a motor controller of a vehicle is located |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217145A (en) * | 2018-09-30 | 2019-01-15 | 国网浙江慈溪市供电有限公司 | A kind of automation dehumidification system of distribution bin |
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| JP4525577B2 (en) * | 2005-12-05 | 2010-08-18 | トヨタ自動車株式会社 | Storage device control device |
| CN206161822U (en) * | 2016-11-08 | 2017-05-10 | 安徽江淮汽车集团股份有限公司 | Battery package reliability detecting system |
| CN207994008U (en) * | 2018-01-30 | 2018-10-19 | 中航锂电（洛阳）有限公司 | A kind of battery pack liquid cooling apparatus, battery pack and vehicle |
| CN113300023B (en) * | 2021-05-21 | 2023-05-26 | 阳光电源股份有限公司 | Energy storage system and condensation prevention control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109217145A (en) * | 2018-09-30 | 2019-01-15 | 国网浙江慈溪市供电有限公司 | A kind of automation dehumidification system of distribution bin |
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