Electric automobile charging protection method capable of adjusting voltage range
Technical Field
The invention relates to the field of charging equipment, in particular to an electric automobile charging protection method capable of adjusting a voltage range.
Background
The charging pile is generally installed in a parking lot of a public building or a residential community, and can charge various types of electric automobiles according to different voltage levels. The input end of the charging pile is directly connected with the alternating current power grid, and the charging gun is installed at the output end of the charging pile, so that the charging pile is convenient for a user to use.
When the ambient temperature increases, the capacity of the battery can be increased, and when the temperature increases by 1 ℃, the capacity increases by 0.8 percent. However, the data shows that when the ambient temperature is 25 ℃, the life of the battery is reduced by half for every 6-10 ℃ increase in temperature. In addition, when the charging environment temperature is high, the high-voltage charging is easy to cause the heat of the storage battery, the service life of the storage battery is reduced when the storage battery is light, and the fire accident occurs when the storage battery is heavy.
Disclosure of Invention
The invention provides an electric automobile charging protection method capable of adjusting a voltage range. The invention has the advantages that: the electric automobile charging protection system has the advantages that the most proper charging voltage can be selected according to the charging environment temperature, so that the service life of the storage battery of the electric automobile is prolonged, and spontaneous combustion or explosion accidents caused by heating when the electric automobile is charged in a high-temperature environment are avoided.
In order to achieve the above purpose, the present invention provides the following technical solutions:
An electric vehicle charge protection system with an adjustable voltage range, comprising: an intelligent master control center; the temperature sensing module is used for acquiring temperature information of the charging environment and electrically transmitting the temperature information to the intelligent main control center; the input module is used for inputting a safe temperature value of the charging environment and an optimal temperature value of the charging by technicians; the temperature comparison module is used for receiving temperature information sent by the intelligent main control center and respectively comparing the temperature information acquired by the temperature sensing module with the safe temperature value of the charging environment and the optimal temperature value of the charging; the switch power supply module is controlled by the intelligent main control center and used for controlling the opening or closing of the power supply circuit of the electric automobile; the voltage conversion module is controlled by the intelligent master control center and is used for providing adjustable voltage.
The intelligent master control center can select the most suitable charging voltage at the temperature according to the temperature information of the charging environment acquired by the temperature sensing module, so that the service life of the storage battery of the electric automobile can be greatly prolonged. And when the temperature of the charging environment is higher than the safe temperature value of the charging environment, the intelligent master control center can control the switch power supply module to immediately disconnect the charging circuit and stop supplying power to the electric automobile, so that the storage battery is prevented from being continuously charged at high temperature and high voltage to cause thermal runaway, and the storage battery is prevented from being invalid.
Preferably, the electric automobile charging protection system further comprises a local storage module for storing the corresponding relation between the charging environment temperature and the adjustable voltage; correspondingly, the voltage conversion module comprises a plurality of voltage adjustable modules, and each voltage adjustable module respectively provides corresponding adjustable voltage.
Preferably, the electric automobile charging protection system further comprises a charging timing module for respectively calculating charging time corresponding to the adjustable voltages.
Preferably, the electric automobile charging protection system further comprises a selection input module for a user to select one of a plurality of adjustable voltages to charge the electric automobile.
Preferably, the electric automobile charging protection system further comprises a communication module for a user to send a selection instruction to the intelligent master control center when selecting the adjustable voltage for charging.
Preferably, the temperature sensing module includes a temperature sensor.
Preferably, the electric automobile charging protection system further comprises a display module.
The invention also provides an electric automobile charging protection method with an adjustable voltage range, which comprises the following steps:
s01, acquiring the charging environment temperature:
the temperature sensing module acquires the charging environment temperature and electrically transmits the charging environment temperature to the intelligent main control center;
s02, charging is carried out for a plurality of times under different charging environment temperatures to obtain a charging environment safety temperature value, and the charging environment safety temperature value is input to a temperature comparison module in advance by a technician;
The temperature comparison module comprises a first temperature comparison module, wherein the first temperature comparison module is used for comparing the charging environment temperature with a charging environment safety temperature value;
When the charging environment temperature is larger than the charging environment safety temperature value, the switching power supply module controls the charging circuit to be disconnected;
when the charging environment temperature is smaller than the charging environment safety temperature value, turning to S03;
s03, charging for a plurality of times under different charging environment temperatures to obtain a charging optimal temperature value, and inputting the charging optimal temperature value into a temperature comparison module in advance by a technician;
the temperature comparison module comprises a second temperature comparison module which is used for comparing the charging environment temperature with the charging optimum temperature value;
When the charging environment temperature is greater than the charging optimum temperature value, the voltage conversion module converts the adjustable voltage into a voltage corresponding to the charging optimum temperature value;
When the charging environment temperature is smaller than the charging optimum temperature value, the display module displays the adjustable voltage for the user to select conversion, and meanwhile, the charging time module calculates the charging completion time corresponding to each adjustable voltage.
Preferably, in step S03, when the user selects the adjustable voltage, charging is performed at the selected adjustable voltage; when the user does not select the adjustable voltage, the voltage conversion module charges according to the optimal adjustable voltage corresponding to the charging environment temperature.
The beneficial effects of the invention are as follows:
According to the invention, the intelligent main control center can select the most suitable charging voltage at the temperature according to the temperature information of the charging environment obtained by the temperature sensing module, so that the service life of the storage battery of the electric automobile can be greatly prolonged. And when the temperature of the charging environment is higher than the safe temperature value of the charging environment, the intelligent master control center can control the switch power supply module to immediately disconnect the charging circuit and stop supplying power to the electric automobile, so that the storage battery is prevented from being continuously charged at high temperature and high voltage to cause thermal runaway, and the storage battery is prevented from being invalid.
Drawings
Fig. 1 is a schematic structural diagram of an electric vehicle charging protection system with an adjustable voltage range in embodiment 1;
fig. 2 is a flowchart of an electric vehicle charging protection method with an adjustable voltage range in embodiment 2;
Fig. 3 is a table showing the correspondence between the charging environment temperature and the adjustable voltage in the embodiments 1 and 2.
In the figure: 1. the intelligent main control center comprises an intelligent main control center body, 11, a voltage conversion module, 12, a temperature sensing module, 120, a temperature sensor, 13, a temperature comparison module, 14, a local storage module, 15, an input module, 16, a communication module, 17, a charging timing module, 18 and a switching power supply module.
Detailed Description
Example 1
The embodiment provides a technical scheme:
An electric vehicle charge protection system with an adjustable voltage range, comprising: an intelligent master control center 1; the temperature sensing module 12 is used for acquiring temperature information of the charging environment and electrically transmitting the temperature information to the intelligent master control center 1; the input module 15 is used for inputting a safe temperature value of the charging environment and an optimal temperature value of the charging by a technician; the temperature comparison module 13 receives the temperature information sent by the intelligent master control center 1 and respectively compares the temperature information acquired by the temperature sensing module 12 with the safe temperature value of the charging environment and the optimal temperature value of charging; the switch power supply module 18 is controlled by the intelligent master control center 1 and is used for controlling the opening or closing of a power supply circuit of the electric automobile; the voltage conversion module 11 is controlled by the intelligent master control center 1 and is used for providing adjustable voltage; a local storage module 14 for storing a correspondence between a charging ambient temperature and an adjustable voltage; correspondingly, the voltage conversion module 11 comprises a plurality of voltage adjustable modules, and each voltage adjustable module respectively provides corresponding adjustable voltage; the charging timing module 17 is used for respectively calculating charging time corresponding to the adjustable voltages; a selection input module for a user to select one of a plurality of adjustable voltages to charge the electric automobile; the communication module 16 is used for sending a selection instruction to the intelligent master control center 1 when a user selects the adjustable voltage for charging; and a display module. Wherein the temperature sensing module 12 includes a temperature sensor 120.
In the invention, the intelligent master control center 1 can select the most suitable charging voltage at the temperature according to the temperature information of the charging environment acquired by the temperature sensing module 12, so that the service life of the storage battery of the electric automobile can be greatly prolonged. And, when the temperature of the charging environment is higher than the safe temperature value of the charging environment, the intelligent master control center 1 can control the switching power supply module 18 to immediately disconnect the charging circuit and stop supplying power to the electric automobile, thereby preventing the battery from being continuously charged at high temperature and high voltage to cause thermal runaway and to cause the failure of the battery.
Example 2
The electric automobile charging protection method with the adjustable voltage range comprises the following steps of:
s01, acquiring the charging environment temperature:
the temperature sensing module 12 acquires the charging environment temperature and electrically transmits the charging environment temperature to the intelligent master control center 1;
s02, charging is carried out for a plurality of times at different charging environment temperatures to obtain a charging environment safety temperature value, and the charging environment safety temperature value is input to the temperature comparison module 13 in advance by a technician;
The temperature comparison module 13 includes a first temperature comparison module, which is used for comparing the charging environment temperature with the charging environment safety temperature value;
when the charging ambient temperature is greater than the charging ambient safety temperature value, the switching power supply module 18 controls the charging circuit to be turned off;
when the charging environment temperature is smaller than the charging environment safety temperature value, turning to S03;
S03, charging for a plurality of times under different charging environment temperatures to obtain a charging optimal temperature value, and inputting the charging optimal temperature value into the temperature comparison module 13 in advance by a technician;
The temperature comparison module 13 includes a second temperature comparison module, which is used for comparing the charging ambient temperature with the charging optimum temperature value;
When the charging environment temperature is greater than the charging optimum temperature value, the voltage conversion module 11 converts the adjustable voltage into a voltage corresponding to the charging optimum temperature value;
When the charging ambient temperature is less than the charging optimum temperature value, the display module displays the adjustable voltages for the user to select conversion, and meanwhile, the charging time module 17 calculates the charging completion time corresponding to each adjustable voltage. When the user selects the adjustable voltage, charging is carried out according to the selected adjustable voltage; when the user does not select the adjustable voltage, the voltage conversion module 11 charges according to the optimal adjustable voltage corresponding to the charging environment temperature.
The following specific examples are:
Firstly, a technician inputs a safe charging environment temperature value into an intelligent main control center 1 through an input module, then a temperature sensing module 12 arranged on electric vehicle charging equipment detects that the charging environment temperature is 23 ℃, a temperature comparison module 13 compares the charging environment temperature with a preset safe charging environment temperature value range, and the charging environment temperature is 23 ℃ within the safe charging environment temperature value range-25-55 ℃, so that the electric vehicle storage battery provided by the embodiment is the optimal charging temperature value at 25 ℃ and the charging environment temperature is 23 ℃ and is smaller than the optimal charging temperature value, and therefore, according to a relation table provided in the embodiment 3, charging voltage values which can be selected by a user are 225, 228, 235 and 240 and correspond to charging completion time which is provided for the user at the same time.