CN111483343B - Intelligent and safe charging system for new energy automobile - Google Patents
Intelligent and safe charging system for new energy automobile Download PDFInfo
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- CN111483343B CN111483343B CN202010391083.7A CN202010391083A CN111483343B CN 111483343 B CN111483343 B CN 111483343B CN 202010391083 A CN202010391083 A CN 202010391083A CN 111483343 B CN111483343 B CN 111483343B
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
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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
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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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- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
Abstract
The invention discloses an intelligent safe charging system of a new energy automobile, which comprises a charging mechanism and a temperature monitoring mechanism, wherein the temperature monitoring mechanism monitors the heat dissipation state of a vehicle during the charging of a battery pack by the charging mechanism, the charging mechanism monitors the charging state of the battery pack of the vehicle, controls the charging voltage and current according to the heat dissipation state of the vehicle and the charging state of the battery pack, keeps the internal accumulated heat of the vehicle stable, and further comprises a pressure detection device positioned at the charging position of the vehicle, monitors the contact pressure of each tire of the vehicle in real time, and reduces the charging voltage to the safe voltage when the contact pressure of the tire continuously changes; in the implementation of the invention, the charging time is shortened in a safe range of the vehicle charging temperature, the charging system is not required to be communicated with a controller in the automobile, and the vehicle charging temperature state can be reliably monitored by a temperature monitoring mechanism of the charging system.
Description
Technical Field
The invention relates to the field of new energy automobile charging, in particular to an intelligent and safe charging system for a new energy automobile.
Background
The new energy electric automobile relies on the storage battery to store electric power, the types of electric automobile battery packs on the market at present are different, and charging protocols between the electric automobile battery packs are incompatible, so that charging piles and charging stations are not completely compatible with charging of the automobile. Voltage and current overload during charging causes the temperature of the vehicle to be too high, and the vehicle can be damaged or even spontaneously ignited.
The built-in temperature sensor is used in the traditional mode for avoiding overhigh temperature of the vehicle, but the temperature sensor in the vehicle with incompatible charging protocols cannot communicate with the charging pile, the temperature measuring device of the charging pile cannot accurately estimate the temperature of the vehicle, full-load discharging voltage of the battery can only be used as charging voltage, the charging voltage is not increased, safety is ensured in sequence, and the charging time can be prolonged by the mode, so that the charging pile is not convenient to use.
The patent with the publication number CN105857104A discloses a charging system of one-way plug-in, including the interface that charges, the charging cable of car and fill electric pile, the one end of charging cable with fill the electric pile rigid coupling, the one end rigid coupling that the charging cable kept away from filling electric pile has charging plug, charging plug selectivity and the interface connection that charges of car, the inside rigid coupling of charging plug has temperature sensor, the inside rigid coupling of filling electric pile has current control device. Set up temperature sensor in charging plug among the above-mentioned scheme, but charging plug and electric motor car are only in charging socket contact, can't comprehensively monitor the holistic temperature state of vehicle comprehensively. Recording the temperature of the charging plug is not of great practical value.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides an intelligent and safe charging system for a new energy automobile, which shortens the charging time in a safe range under the condition of ensuring the charging temperature of the automobile.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
an intelligent safe charging system of a new energy automobile comprises a charging mechanism and a temperature monitoring mechanism;
during the charging of the battery pack by the charging mechanism, the temperature monitoring mechanism monitors the heat dissipation state of the vehicle, and the charging mechanism monitors the battery pack charging state of the vehicle;
and controlling the charging voltage and current according to the heat dissipation state of the vehicle and the charging state of the battery pack, and keeping the accumulated heat in the vehicle stable.
Furthermore, the vehicle sun shade also comprises a sunshade for shading the vehicle from sunlight;
the temperature monitoring mechanism monitors the heat dissipation state of the vehicle and comprises,
the temperature monitoring mechanism comprises an upper infrared thermal imager positioned above the vehicle and a lower infrared thermal imager positioned below the vehicle,
the upper infrared thermal imager and the lower infrared thermal imager monitor and record the temperature of the surface of the vehicle and the temperature of the air flow before and after contact with the surface of the vehicle,
calculating the total quantity (Q) of heat radiation emitted to the outside by the vehicle through the heat radiation according to the difference between the temperature of the surface of the vehicle and the ambient temperaturer) And thermal radiation power (P)r)，
Calculating the total quantity of heat conduction (Q) of the vehicle to the outside by conduction according to the difference of the temperatures of the air flows before and after the vehicle surface is contactedc) And heat conduction power (P)c)；
According to total quantity of heat radiation (Q)r) And total heat transfer quantity (Q)c) The sum judges the accumulated heat dissipating capacity (Q);
according to the thermal radiation power (P)r) And heat conduction power (P)c) The sum of the heat dissipation power (P) is determined.
Further, the total amount (Q) of heat radiation emitted from the vehicle to the outside by heat radiation is calculated based on the difference between the temperature of the surface of the vehicle and the ambient temperaturer) And thermal radiation power (P)r) The method comprises the following steps of (1),
gridding the surface of the vehicle;
calculating the average temperature of the surface grid of each vehicle according to the image collected by the infrared thermal imager;
calculating the heat radiation power (P) according to the difference between the average temperature of the grid on the surface of the vehicle and the ambient temperaturer)；
The heat radiation power (P)r) The total amount of heat radiation (Q) is obtained by integrating the charging timer)。
Further, the total amount of heat conduction (Q) of the vehicle to the outside by conduction is calculated based on the difference between the temperatures of the air flows before and after the vehicle surface is in contact with the vehicle surfacec) And heat conduction power (P)c) The method comprises the following steps of (1),
rasterizing a space near the surface of the vehicle;
calculating the average temperature of each grid space according to the image collected by the infrared thermal imager;
calculating the temperature difference of the grid space on the surface of the adjacent vehicle in unit time;
calculating the heat conduction power (P) according to the temperature difference of the grid space on the surface of the adjacent vehicle in unit timec) The multiplier of the unit time and the wind speed is smaller than the side length of the grid space;
transfer heat to power (P)c) The total heat transfer (Q) is obtained by integrating the charging timec)。
Further, the controlling of the charging voltage and current according to the heat dissipation state of the vehicle and the charging state of the battery pack to maintain the stability of the accumulated heat in the vehicle includes,
the battery pack charging state comprises a battery pack continuous charging state;
the battery pack continuous charging state comprises intermittently measured battery pack charging open-circuit voltage, battery pack charging internal resistance and battery pack charging current;
calculating the real-time heating value of the battery pack and the total heating value of the battery pack according to the real-time measured charging current of the battery pack and the real-time measured charging internal resistance of the battery pack;
calculating the accumulated heat in the vehicle according to the total heating amount of the battery pack and the accumulated heat dissipation amount (Q);
during the charging of the battery:
acquiring a safe voltage;
charging the battery using the safe voltage;
when the value of the real-time heat dissipation power (P) is kept stable, recording the accumulated heat and the charging current inside the vehicle at the moment;
the charging voltage is increased;
when the vehicle interior accumulated heat quantity increases, the charging voltage is reduced, so that the vehicle interior accumulated heat quantity is kept stable.
Further, the battery pack continuous charging state comprises intermittently measured battery pack charging open circuit voltage, battery pack charging internal resistance, including,
and measuring the charging open-circuit voltage of the battery pack and the charging internal resistance of the battery pack in the process of intermittently disconnecting the charging voltage of the battery pack by the charging mechanism.
Further, the obtaining of the safety voltage includes,
the battery pack state of charge further comprises a battery pack initial state of charge,
the initial charging state of the battery pack comprises the initial open-circuit voltage of the battery pack and the initial internal resistance of the battery pack,
calculating the open-circuit voltage of the battery in a full-charge state according to the initial open-circuit voltage of the battery and the real-time measured open-circuit voltage of the battery,
and taking the open-circuit voltage in the full-charge state of the battery as a safe voltage.
Further, the battery pack initial charging state comprises a battery pack initial open circuit voltage, a battery pack initial internal resistance, including,
after the charging mechanism is electrically connected with the battery pack, the charging voltage is not applied temporarily, and the initial open-circuit voltage of the battery pack and the initial internal resistance of the battery pack are measured.
Further, the calculating the open circuit voltage of the battery in the full charge state according to the initial open circuit voltage of the battery pack and the real-time measured open circuit voltage of the battery pack charging comprises,
modeling the measured open circuit voltage of the battery pack charge as a function of the charge time during a period of time in which a constant charge voltage is maintained,
and estimating the open-circuit voltage of the battery in the full-charge state according to the function model.
Further, the method comprises the steps of controlling charging voltage and current according to the heat dissipation state of the vehicle and the charging state of the battery pack, keeping the accumulated heat in the vehicle stable, and further comprising,
measuring and calculating the change trend of the charging internal resistance of the battery pack in real time;
when the internal resistance of the battery pack generates nonlinear sudden change and the charging current generates nonlinear sudden increase, the charging is cut off and an alarm is given out.
The vehicle charging system further comprises a pressure detection device positioned at a vehicle charging position, the pressure detection device is used for monitoring the contact pressure of each tire of the vehicle in real time, when the contact pressure of the tire is continuously changed, the charging voltage is reduced to a safe voltage, and when the contact pressure of the tire is kept unchanged, the charging voltage is increased;
the contact pressure of the tires continuously changes, which indicates that people move in the vehicle, the charging voltage is increased to possibly harm people in the vehicle, the heat dissipation power of the human body is about 100W, the heat dissipation efficiency of the vehicle can be reduced by the human body, and the charging safety of the battery pack is also improved by reducing the charging voltage.
The benefit effects of the invention are:
1. shortening the charging time in a safe range of ensuring the charging temperature of the vehicle; in the charging process, the temperature monitoring mechanism monitors the heat dissipation state of the vehicle, the charging mechanism monitors the charging state of the battery pack of the vehicle, and the charging voltage and current are controlled according to the heat dissipation state of the vehicle and the charging state of the battery pack to keep the accumulated heat in the vehicle stable.
2. The charging system does not need to communicate with a controller in the automobile, can reliably monitor the charging temperature state of the vehicle by a temperature monitoring mechanism of the charging system, and is suitable for new energy vehicles of various models.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a first schematic diagram of an intelligent and safe charging system for a new energy automobile according to the invention;
fig. 2 is a schematic diagram two of the intelligent safe charging system for the new energy automobile according to the invention;
fig. 3 is a third schematic diagram of the intelligent and safe charging system for the new energy automobile according to the invention;
fig. 4 is a fourth schematic diagram of the intelligent safe charging system for the new energy automobile according to the invention;
fig. 5 is a fifth schematic diagram of the intelligent and safe charging system for the new energy automobile according to the invention;
fig. 6 is a schematic diagram of the open circuit voltage of battery charging with the battery charged at a constant voltage.
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.
As shown in the figures 1-5 of the drawings,
the invention relates to an intelligent safe charging system of a new energy automobile, which is characterized in that: the device comprises a charging mechanism, a temperature monitoring mechanism and a sunshade for shielding the vehicle from sunlight; on the one hand, the direct sunlight is prevented from raising the surface temperature of the vehicle, and on the other hand, the accuracy of temperature monitoring is improved.
The temperature monitoring mechanism comprises an upper infrared thermal imager positioned above the vehicle and a lower infrared thermal imager positioned below the vehicle for continuously monitoring the vehicle during the charging of the battery pack by the charging mechanism,
the upper infrared thermal imager and the lower infrared thermal imager monitor and record the temperature of the surface of the vehicle and the temperature of the air flow before and after contact with the surface of the vehicle,
in order to facilitate digital processing of the monitored temperature information, gridding is carried out on the surface of the vehicle;
calculating the average temperature of the surface grid of each vehicle according to the image collected by the infrared thermal imager;
calculating the heat radiation power (P) according to the difference between the average temperature of the grid on the surface of the vehicle and the ambient temperaturer)；
The heat radiation power (P)r) The total amount of heat radiation (Q) is obtained by integrating the charging timer)，
Calculating the total quantity of heat conduction (Q) of the vehicle to the outside by conduction according to the difference of the temperatures of the air flows before and after the vehicle surface is contactedc) And heat conduction power (P)c)；
According to total quantity of heat radiation (Q)r) And total heat transfer quantity (Q)c) The sum of the heat dissipation amounts is judged as the cumulative heat dissipation amount (Q).
In order to facilitate digital processing of the temperature information obtained by monitoring, the adjacent space on the surface of the vehicle is rasterized;
calculating the average temperature of each grid space according to the image collected by the infrared thermal imager;
calculating the temperature difference of the grid space on the surface of the adjacent vehicle in unit time;
calculating the heat conduction power (P) according to the temperature difference of the grid space on the surface of the adjacent vehicle in unit timec) The multiplier of the unit time and the wind speed is smaller than the side length of the grid space;
transfer heat toConducting power (P)c) The total heat transfer (Q) is obtained by integrating the charging timec)。
The charging mechanism monitors the charging state of a battery pack of the vehicle, wherein the charging state of the battery pack comprises the continuous charging state of the battery pack;
the battery pack continuous charging state comprises intermittently measured battery pack charging open-circuit voltage, battery pack charging internal resistance and battery pack charging current;
measuring the charging open-circuit voltage of the battery pack and the charging internal resistance of the battery pack in the process of intermittently disconnecting the charging voltage of the battery pack by the charging mechanism;
after the charging mechanism is electrically connected with the battery pack, temporarily not applying charging voltage, and measuring initial open-circuit voltage of the battery pack and initial internal resistance of the battery pack;
calculating the real-time heating value of the battery pack and the total heating value of the battery pack according to the real-time measured charging current of the battery pack and the real-time measured charging internal resistance of the battery pack;
calculating the accumulated heat in the vehicle according to the total heating amount of the battery pack and the accumulated heat dissipation amount (Q);
during the charging of the battery:
the battery pack state of charge further comprises a battery pack initial state of charge,
the initial charging state of the battery pack comprises the initial open-circuit voltage of the battery pack and the initial internal resistance of the battery pack,
as shown in figure 6 of the drawings,
establishing a function model of the measured open-circuit voltage of the battery pack charging with respect to the charging time in a time period of keeping constant charging voltage, under the condition of keeping constant charging voltage, gradually increasing the open-circuit voltage of the battery pack charging with the charging time, continuously decreasing the increase value of the open-circuit voltage in unit time, and finally keeping a constant value,
estimating the open-circuit voltage of the battery in the full-charge state according to the function model,
taking the battery full-charge state open-circuit voltage as a safe voltage;
charging the battery using the safe voltage;
when the value of the real-time heat dissipation power (P) is kept stable, recording the accumulated heat and the charging current inside the vehicle at the moment;
and then increasing the charging voltage, and when the accumulated heat in the vehicle is increased, decreasing the charging voltage to keep the accumulated heat in the vehicle stable.
The vehicle charging system also comprises a pressure detection device positioned at a vehicle charging position, the pressure detection device is used for monitoring the contact pressure of each tire of the vehicle in real time, when the contact pressure of the tire is continuously changed, the charging voltage is reduced to a safe voltage, and when the contact pressure of the tire is kept unchanged, the charging voltage is increased;
the contact pressure of the tires continuously changes, which indicates that people move in the vehicle, the charging voltage is increased to possibly harm people in the vehicle, the heat dissipation power of the human body is about 100W, the heat dissipation efficiency of the vehicle can be reduced by the human body, and the charging safety of the battery pack is also improved by reducing the charging voltage.
In the implementation of the steps, the change trend of the charging internal resistance of the battery pack is measured and calculated in real time;
when the charging internal resistance of the battery pack generates nonlinear sudden change and the charging current generates nonlinear sudden increase, the battery is abnormally charged, the charging is cut off, and an alarm is given out.
In the above-mentioned operation, compare traditional mode, guaranteeing that the vehicle temperature of charging shortens the charge time in safety range, do not need charging system and the inside controller of car to carry out the communication, rely on the temperature monitoring mechanism of charging system itself can carry out reliable monitoring to the vehicle temperature state of charging.
In the description herein, references to the terms "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. The utility model provides a new energy automobile intelligent security charging system which characterized in that: the device comprises a charging mechanism and a temperature monitoring mechanism;
during the charging of the battery pack by the charging mechanism, the temperature monitoring mechanism monitors the heat dissipation state of the vehicle, and the charging mechanism monitors the battery pack charging state of the vehicle;
controlling charging voltage and current according to the heat dissipation state of the vehicle and the charging state of the battery pack, and keeping the accumulated heat in the vehicle stable;
also comprises a sunshade for shielding the vehicle from sunlight;
the temperature monitoring mechanism monitors the heat dissipation state of the vehicle and comprises,
the temperature monitoring mechanism comprises an upper infrared thermal imager positioned above the vehicle and a lower infrared thermal imager positioned below the vehicle,
the upper infrared thermal imager and the lower infrared thermal imager monitor and record the temperature of the surface of the vehicle and the temperature of the air flow before and after contact with the surface of the vehicle,
calculating the total quantity (Q) of heat radiation emitted to the outside by the vehicle through the heat radiation according to the difference between the temperature of the surface of the vehicle and the ambient temperaturer) And thermal radiation power (P)r)，
Calculating the total quantity of heat conduction (Q) of the vehicle to the outside by conduction according to the difference of the temperatures of the air flows before and after the vehicle surface is contactedc) And heat conduction power (P)c)；
According to total quantity of heat radiation (Q)r) And total heat transfer quantity (Q)c) The sum judges the accumulated heat dissipating capacity (Q);
according to the thermal radiation power (P)r) And heat conduction power (P)c) The sum of the heat dissipation power (P) is judged and judged;
the total amount (Q) of heat radiation emitted to the outside by the vehicle through heat radiation is calculated according to the difference between the temperature of the surface of the vehicle and the ambient temperaturer) And thermal radiation power (P)r) The method comprises the following steps of (1),
gridding the surface of the vehicle;
calculating the average temperature of the surface grid of each vehicle according to the image collected by the infrared thermal imager;
calculating the heat radiation power (P) according to the difference between the average temperature of the grid on the surface of the vehicle and the ambient temperaturer)；
The heat radiation power (P)r) The total amount of heat radiation (Q) is obtained by integrating the charging timer)。
2. The charging system according to claim 1, wherein: the total quantity (Q) of heat conduction emitted to the outside by the vehicle in a conduction mode is calculated according to the difference of the temperatures of the air flows before and after the air flow is in contact with the surface of the vehiclec) And heat conduction power (P)c) The method comprises the following steps of (1),
rasterizing a space near the surface of the vehicle;
calculating the average temperature of each grid space according to the image collected by the infrared thermal imager;
calculating the temperature difference of the grid space on the surface of the adjacent vehicle in unit time;
calculating the heat conduction power (P) according to the temperature difference of the grid space on the surface of the adjacent vehicle in unit timec) The multiplier of the unit time and the wind speed is smaller than the side length of the grid space;
transfer heat to power (P)c) The total heat transfer (Q) is obtained by integrating the charging timec)。
3. The charging system according to claim 1, wherein: the method for controlling charging voltage and current according to the heat dissipation state of the vehicle and the charging state of the battery pack to keep the accumulated heat in the vehicle stable comprises,
the battery pack charging state comprises a battery pack continuous charging state;
the battery pack continuous charging state comprises intermittently measured battery pack charging open-circuit voltage, battery pack charging internal resistance and battery pack charging current;
calculating the real-time heating value of the battery pack and the total heating value of the battery pack according to the real-time measured charging current of the battery pack and the real-time measured charging internal resistance of the battery pack;
calculating the accumulated heat in the vehicle according to the total heating amount of the battery pack and the accumulated heat dissipation amount (Q);
during the charging of the battery:
acquiring a safe voltage;
charging the battery using the safe voltage;
when the value of the real-time heat dissipation power (P) is kept stable, recording the accumulated heat and the charging current inside the vehicle at the moment;
the charging voltage is increased;
when the vehicle interior accumulated heat quantity increases, the charging voltage is reduced, so that the vehicle interior accumulated heat quantity is kept stable.
4. The charging system according to claim 3, wherein: the battery pack continuous charging state comprises intermittently measured battery pack charging open circuit voltage and battery pack charging internal resistance, including,
and measuring the charging open-circuit voltage of the battery pack and the charging internal resistance of the battery pack in the process of intermittently disconnecting the charging voltage of the battery pack by the charging mechanism.
5. The charging system according to claim 3, wherein: the obtaining of the safe voltage includes, by the system,
the battery pack state of charge further comprises a battery pack initial state of charge,
the initial charging state of the battery pack comprises the initial open-circuit voltage of the battery pack and the initial internal resistance of the battery pack,
calculating the open-circuit voltage of the battery in a full-charge state according to the initial open-circuit voltage of the battery and the real-time measured open-circuit voltage of the battery,
and taking the open-circuit voltage in the full-charge state of the battery as a safe voltage.
6. The charging system according to claim 5, wherein: the battery pack initial charging state comprises battery pack initial open circuit voltage, battery pack initial internal resistance, including,
after the charging mechanism is electrically connected with the battery pack, the charging voltage is not applied temporarily, and the initial open-circuit voltage of the battery pack and the initial internal resistance of the battery pack are measured.
7. The charging system according to claim 5, wherein: the method comprises calculating the open-circuit voltage of the battery in the full-charge state according to the initial open-circuit voltage of the battery and the real-time measured open-circuit voltage of the battery, including,
modeling the measured open circuit voltage of the battery pack charge as a function of the charge time during a period of time in which a constant charge voltage is maintained,
and estimating the open-circuit voltage of the battery in the full-charge state according to the function model.
8. The charging system according to claim 3, wherein: the method comprises controlling charging voltage and current according to heat dissipation state of vehicle and charging state of battery pack to maintain stable accumulated heat in vehicle,
measuring and calculating the change trend of the charging internal resistance of the battery pack in real time;
when the internal resistance of the battery pack generates nonlinear sudden change and the charging current generates nonlinear sudden increase, the charging is cut off and an alarm is given out.
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| JPH07184328A (en) * | 1993-12-24 | 1995-07-21 | Toshiba Corp | Charging control, charging circuit and data processor |
| EP2347318A1 (en) * | 2008-09-12 | 2011-07-27 | Boston-Power, Inc. | Method and apparatus for embedded battery cells and thermal management |
| CN105564264B (en) * | 2016-02-23 | 2019-02-22 | 北京新能源汽车股份有限公司 | Batteries of electric automobile fire extinguishing monitoring system and charging pile |
| CN105857104A (en) * | 2016-04-11 | 2016-08-17 | 广东奥美格传导科技股份有限公司 | One-way plug type charging system and temperature protection method during charging |
| JP6379135B2 (en) * | 2016-06-23 | 2018-08-22 | 本田技研工業株式会社 | Power supply and transportation equipment |
| CN107139738B (en) * | 2016-08-26 | 2020-08-11 | 宁波三星医疗电气股份有限公司 | Charging equalization method and alternating current-direct current dual-purpose charging pile |
| US10444394B2 (en) * | 2017-01-10 | 2019-10-15 | Witricity Corporation | Foreign object detection using heat sensitive material and inductive sensing |
| JP6863844B2 (en) * | 2017-07-13 | 2021-04-21 | 株式会社Ｓｕｂａｒｕ | Battery heating system |
| JP6838527B2 (en) * | 2017-08-31 | 2021-03-03 | 株式会社デンソー | Vehicle air conditioner |
| CN108076617B (en) * | 2018-01-04 | 2021-02-02 | 深圳威迈斯新能源股份有限公司 | Heat dissipation structure for vehicle-mounted charger or voltage converter |
| CN108621743B (en) * | 2018-05-07 | 2021-09-03 | 云度新能源汽车有限公司 | Electric automobile thermal management system |
| CN109466362B (en) * | 2018-12-07 | 2021-08-31 | 中能易电新能源技术有限公司 | Charging pile safety monitoring system |
| CN109577687A (en) * | 2018-12-12 | 2019-04-05 | 汉中斯巴达科技有限公司 | It is a kind of can wireless charging Multifunctional bus platform waiting booth |
| CN110316014A (en) * | 2019-06-26 | 2019-10-11 | 河南美力达汽车有限公司 | A kind of electric automobile battery charger charging system and method |
-
2020
- 2020-05-11 CN CN202010391083.7A patent/CN111483343B/en not_active Expired - Fee Related
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