CN110673667B - Intelligent temperature control method and device for vehicle charging connecting device - Google Patents
Intelligent temperature control method and device for vehicle charging connecting device Download PDFInfo
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- CN110673667B CN110673667B CN201810719140.2A CN201810719140A CN110673667B CN 110673667 B CN110673667 B CN 110673667B CN 201810719140 A CN201810719140 A CN 201810719140A CN 110673667 B CN110673667 B CN 110673667B
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- G05D23/19—Control of temperature characterised by the use of electric means
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Abstract
The invention relates to the field of vehicle charging, in particular to an intelligent temperature control method and device for a vehicle charging connecting device. The temperature of the charging connecting device is collected in real time and compared with the normal working temperature, the step temperature control measures are set according to the price comparison result, the charging current value is intelligently adjusted through self-learning comparison, the maximum current carrying capacity of the charging connecting device is fully exerted, the charging time is shortened, and the temperature of the charging connecting device is controlled within a safety range. The control strategy of the invention is simple and easy to realize, and can solve the problems that the current charging connecting device can not continuously work in a high-efficiency area, the charging connecting device can not judge the failure, and whether the failure is easy to make mistakes is judged by only manual experience.
Description
Technical Field
The invention relates to the field of vehicle charging, in particular to an intelligent temperature control method and device for a vehicle charging connecting device.
Background
At present, the charging of the electric automobile is developed towards the direction of large-current quick charging, and the charging current can reach 250A or even more, so that the requirement of quick full charging of the vehicle is met. In the process of charging the vehicle, due to the existence of the contact resistance, the charging connecting device can generate heat, and in order to avoid safety accidents such as fire disasters caused by uncontrolled temperature rise of the charging connecting device in the charging process, temperature monitoring devices are arranged in the current charging connecting device, and the temperature of the charging connecting device is controlled within a safety range by acquiring the temperature in real time and adjusting the charging current.
However, the temperature control strategies of the charging connection device are different, and a single temperature control point is mostly set, for example, after the charging connection device reaches a certain temperature, the vehicle is directly controlled to stop charging or the charging current is greatly reduced, so as to achieve the purpose of reducing the temperature of the charging connection device. Although charging safety can be effectively guaranteed, temperature rise of the charging connecting device is reduced, great troubles are caused to new energy vehicle users, for example, charging is frequently stopped, charging current is greatly reduced, the charging connecting device cannot continuously work in a high-efficiency area, and the healthy development of a new energy market is not facilitated. And charging connecting device life can't cover the vehicle, fill electric pile whole life cycle, and the vehicle and fill electric pile can't accurately hold charging connecting device's failure cycle.
Disclosure of Invention
The invention aims to provide an intelligent temperature control method and device for a vehicle charging connecting device, which are used for solving the problem of low charging efficiency caused by single temperature control strategy of the conventional charging connecting device.
In order to achieve the purpose, the invention provides an intelligent temperature control method of a vehicle charging connecting device, which comprises the following steps:
1) in the charging process, detecting the temperature of the charging connecting device in real time, and if the temperature of the charging connecting device is detected to be larger than the upper limit of the working temperature range, reducing the current charging current according to a first set proportion;
2) continuously detecting the temperature of the charging connecting device, and if the temperature of the charging connecting device is continuously increased or is still larger than the upper limit of the working temperature range after being stabilized, continuously reducing the current charging current according to a second set proportion;
3) continuously detecting the temperature of the charging connecting device, and repeating the steps 1) and 2), if the proportion of the reduced charging current to the initial charging current is less than a set threshold value, stopping charging.
The invention has the beneficial effects that: the temperature of the charging connecting device is collected in real time and compared with the normal working temperature, step temperature control measures are set according to price comparison results, the charging current value is intelligently adjusted through self-learning comparison, the maximum current carrying capacity of the charging connecting device is fully exerted, the charging time is shortened, and the temperature of the charging connecting device is controlled within a safety range.
Further, after the current charging current is reduced, if the temperature of the charging connection device is detected to be within the working temperature range after being stabilized, the current charging current is kept unchanged.
Further, a) after the current charging current is reduced, if the temperature of the charging connection device is detected to be less than the lower limit of the working temperature range after being stabilized, the current charging current is increased according to a third set proportion;
b) continuously detecting the temperature of the charging connecting device, and if the temperature of the charging connecting device is detected to be continuously reduced or is still smaller than the lower limit of the working temperature range after being stabilized, continuously increasing the current charging current according to a fourth set proportion;
c) and c), continuously detecting the temperature of the charging connecting device, repeating the step b), and keeping the current charging current unchanged if the temperature of the charging connecting device is detected to be in the working temperature range after the current charging current is increased and is detected to be stable.
Further, the set threshold is 50%.
The invention also provides an intelligent temperature control device of the vehicle charging connecting device, which comprises a processor and a memory, wherein the memory stores instructions for realizing the following method by the processor:
1) in the charging process, detecting the temperature of the charging connecting device in real time, and if the temperature of the charging connecting device is detected to be larger than the upper limit of the working temperature range, reducing the current charging current according to a first set proportion;
2) continuously detecting the temperature of the charging connecting device, and if the temperature of the charging connecting device is continuously increased or is still larger than the upper limit of the working temperature range after being stabilized, continuously reducing the current charging current according to a second set proportion;
3) continuously detecting the temperature of the charging connecting device, and repeating the steps 1) and 2), if the proportion of the reduced charging current to the initial charging current is less than a set threshold value, stopping charging.
Further, after the current charging current is reduced, if the temperature of the charging connection device is detected to be within the working temperature range after being stabilized, the current charging current is kept unchanged.
Further, a) after the current charging current is reduced, if the temperature of the charging connection device is detected to be less than the lower limit of the working temperature range after being stabilized, the current charging current is increased according to a third set proportion;
b) continuously detecting the temperature of the charging connecting device, and if the temperature of the charging connecting device is detected to be continuously reduced or is still smaller than the lower limit of the working temperature range after being stabilized, continuously increasing the current charging current according to a fourth set proportion;
c) and c), continuously detecting the temperature of the charging connecting device, repeating the step b), and keeping the current charging current unchanged if the temperature of the charging connecting device is detected to be in the working temperature range after the current charging current is increased and is detected to be stable.
Further, the set threshold is 50%.
The control strategy of the invention is simple and easy to realize, and can solve the problems that the current charging connecting device can not continuously work in a high-efficiency area, the charging connecting device can not judge the failure, and whether the failure is easy to make mistakes is judged by only manual experience.
Drawings
FIG. 1 is a flow chart of an embodiment of the method of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The invention provides an intelligent temperature control method and device for a vehicle charging connecting device, which are characterized in that whether charging current needs to be adjusted or not is judged according to the detected real-time temperature of the charging connecting device, if the charging current needs to be adjusted, the current is adjusted according to a set proportion to increase or decrease the charging current, the temperature of the charging connecting device is continuously detected after the current is adjusted, the temperature change condition is analyzed, the current is continuously increased or decreased according to the analysis result according to the set proportion, and then charging is continuously carried out according to the processed current until the temperature of the charging connecting device is within a normal working temperature range. The proportionality coefficients used in adjusting the magnitude of the charging current each time can be the same or different.
The temperature control measure of the charging connecting device provided by the invention is suitable for controlling the temperature of the charging socket of a vehicle and the charging gun of a charging pile. One specific example is given below, the control strategy is as follows:
setting the optimal working temperature range (T1-T2) of the charging connecting device, and setting the real-time temperature of the charging connecting device to be Ta; and detecting the temperature of the connecting device in real time in the charging process.
a) If T1 < Ta < T2, the charging current value continues to be I;
b) if Ta > T2, the charging current is reduced to (1-b%) I, and the temperature Ta of the charging connection device is continuously detected;
(1) if Ta continues to drop and stabilize, T1 < Ta < T2, then the charging current is maintained at (1-b%). I; if Ta > T2, the charging current is reduced to (1-b%)2I, in (1-b%)2After Ta is reduced to a stable value during charging I, if Ta is more than or equal to T2, the ratio is (1-b%)kReducing the charging current value, continuously detecting a stable value after the Ta falls, and circularly comparing the stable value with T1 and T2, if Ta is less than T1, reducing the k value, and if Ta is more than or equal to T2, increasing the k value until T1 is less than Ta and less than T2;
(2) if Ta continues to rise, the charging current is immediately reduced to (1-b%)kUntil the value of Ta begins to decline, circularly comparing the steady value after the decline of Ta with T1 and T2, if Ta is less than T1, reducing the k value, and if Ta is more than or equal to T2, increasing the k value until T1 is less than Ta and less than T2;
c) when (1-b%)kWhen less than or equal to 0.5, the vehicle or the charging pile prompts that the charging connecting device is to be replaced.
The Ta temperature data is monitored in real time and compared with the Ta temperature data by self, and the data is judged to be increased or decreased, wherein the unit is; t1 and T2 are respectively the upper limit and the lower limit of the optimal working temperature range of the charging connecting device, T1 is greater than T2, the difference between the two is less than or equal to 10, and the unit is; b is an integer, b% represents the percent reduction of current, and b is not preferably greater than 20; i is a charging current value, and the unit is A; k is an integer, 1,2,3,4,5 … k, and when adjusting the k value, the up and down adjustment is performed by taking 1 as a step.
The specific implementation of the present invention is given above, but the present invention is not limited to the described implementation, and in other embodiments, when adjusting the current magnitude, the magnitude of the proportionality coefficient and the adjustment mode adopt other strategies; the specific values may be adjusted according to actual requirements, and the technical solution formed in this way is formed by fine tuning the above embodiments, and still falls within the protection scope of the present invention.
Claims (8)
1. An intelligent temperature control method for a vehicle charging connecting device is characterized by comprising the following steps:
1) setting an optimal working temperature range, detecting the temperature of the charging connecting device in real time in the charging process, and if the temperature of the charging connecting device is detected to be larger than the upper limit of the working temperature range, and if the current charging current value is marked as I, reducing the current charging current to (1-b%). I;
2) continuously detecting the temperature of the charging connection device:
a. if the temperature of the charging connection device is within the optimal working temperature range after continuously dropping and stabilizing, the charging current keeps (1-b%) I unchanged; if the temperature is higher than the upper limit of the optimal working temperature range, the charging current is reduced to (1-b%)2I, reduced charging current (1-b%)2When charging, after the temperature is reduced to a stable value, if the temperature is still larger than the upper limit of the optimal working temperature range, the temperature is calculated according to (1-b%)kContinuing to reduce the charging current value;
continuously detecting the stable value after the temperature is reduced, circularly comparing the stable value with the upper limit and the lower limit of the optimal working temperature range, reducing the k value if the stable value after the temperature is reduced is less than the lower limit of the optimal working temperature range, and increasing the k value if the stable value after the temperature is reduced is more than or equal to the upper limit of the optimal working temperature range until the stable value after the temperature is reduced is in the optimal working temperature range;
b. if the temperature of the charging connection device continues to rise, the charging current is immediately reduced to (1-b%)kI until the temperature begins to decrease; continuously detecting the stable value after the temperature is reduced and circularly comparing the stable value with the upper limit and the lower limit of the optimal working temperature range, if the stable value after the temperature is reduced is less than the lower limit of the optimal working temperature range, reducing the k value, and if the stable value after the temperature is reduced is more than or equal to the upper limit of the optimal working temperature range, increasing the k value until the stable value after the temperature is reduced is in the optimal working temperature range; if the proportion of the reduced charging current to the initial charging current is smaller than a set threshold value, stopping charging;
in the step 1) and the step 2), k is a positive integer, and the value of k is adjusted up and down by taking 1 as a step length; b is an integer, b% represents the percent reduction in current, b is not greater than 20;
in the step 1), if the temperature of the charging connection device is detected to be within the working temperature range, keeping the current charging current unchanged.
2. The intelligent temperature control method of the vehicle charging connection device according to claim 1, characterized in that: and after the current charging current is reduced, if the temperature of the charging connecting device is detected to be within the working temperature range after being stabilized, keeping the current charging current unchanged.
3. The intelligent temperature control method for the vehicle charging connection device according to claim 1 or 2, characterized in that:
a) after the current charging current is reduced, if the temperature of the charging connecting device is detected to be stable and then is smaller than the lower limit of the working temperature range, the current charging current is increased according to a third set proportion;
b) continuously detecting the temperature of the charging connecting device, and if the temperature of the charging connecting device is detected to be continuously reduced or is still smaller than the lower limit of the working temperature range after being stabilized, continuously increasing the current charging current according to a fourth set proportion;
c) and c), continuously detecting the temperature of the charging connecting device, repeating the step b), and keeping the current charging current unchanged if the temperature of the charging connecting device is detected to be in the working temperature range after the current charging current is increased and is detected to be stable.
4. The intelligent temperature control method of the vehicle charging connection device according to claim 3, characterized in that: the set threshold is 50%.
5. An intelligent temperature control device of a vehicle charging connection device comprises a processor and a memory, and is characterized in that the memory stores instructions for realizing the following method by the processor:
1) setting an optimal working temperature range, detecting the temperature of the charging connecting device in real time in the charging process, and if the temperature of the charging connecting device is detected to be larger than the upper limit of the working temperature range, and if the current charging current value is marked as I, reducing the current charging current to (1-b%). I;
2) continuously detecting the temperature of the charging connection device:
a. if the temperature of the charging connection device is within the optimal working temperature range after continuously dropping and stabilizing, the charging current keeps (1-b%) I unchanged; if the temperature is higher than the upper limit of the optimal working temperature range, the charging current is reduced to (1-b%)2I, reduced charging current (1-b%)2When charging, after the temperature is reduced to a stable value, if the temperature is still larger than the upper limit of the optimal working temperature range, the temperature is calculated according to (1-b%)kContinuing to reduce the charging current value;
continuously detecting the stable value after the temperature is reduced, circularly comparing the stable value with the upper limit and the lower limit of the optimal working temperature range, reducing the k value if the stable value after the temperature is reduced is less than the lower limit of the optimal working temperature range, and increasing the k value if the stable value after the temperature is reduced is more than or equal to the upper limit of the optimal working temperature range until the stable value after the temperature is reduced is in the optimal working temperature range;
b. if the temperature of the charging connection device continues to rise, the charging current is immediately reduced to (1-b%)kI until the temperature begins to decrease; continuously detecting the stable value after the temperature is reduced and circularly comparing the stable value with the upper limit and the lower limit of the optimal working temperature range, if the stable value after the temperature is reduced is less than the lower limit of the optimal working temperature range, reducing the k value, and if the stable value after the temperature is reduced is more than or equal to the upper limit of the optimal working temperature range, increasing the k value until the stable value after the temperature is reduced is in the optimal working temperature range;
if the proportion of the reduced charging current to the initial charging current is smaller than a set threshold value, stopping charging;
in the step 1) and the step 2), k is a positive integer, and the value of k is adjusted up and down by taking 1 as a step length; b is an integer, b% represents the percent reduction in current, b is not greater than 20;
in the step 1), if the temperature of the charging connection device is detected to be within the working temperature range, keeping the current charging current unchanged.
6. The intelligent temperature control device of the vehicle charging connection device according to claim 5, wherein: and after the current charging current is reduced, if the temperature of the charging connecting device is detected to be within the working temperature range after being stabilized, keeping the current charging current unchanged.
7. The intelligent temperature control device of the vehicle charging connection device according to claim 5 or 6, wherein:
a) after the current charging current is reduced, if the temperature of the charging connecting device is detected to be stable and then is smaller than the lower limit of the working temperature range, the current charging current is increased according to a third set proportion;
b) continuously detecting the temperature of the charging connecting device, and if the temperature of the charging connecting device is detected to be continuously reduced or is still smaller than the lower limit of the working temperature range after being stabilized, continuously increasing the current charging current according to a fourth set proportion;
c) and c), continuously detecting the temperature of the charging connecting device, repeating the step b), and keeping the current charging current unchanged if the temperature of the charging connecting device is detected to be in the working temperature range after the current charging current is increased and is detected to be stable.
8. The intelligent temperature control device of the vehicle charging connection device according to claim 7, wherein: the set threshold is 50%.
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| CN112248866B (en) * | 2020-11-06 | 2022-04-29 | 长春捷翼汽车零部件有限公司 | Charging control device and method for electric vehicle |
| CN112389220B (en) * | 2020-11-06 | 2022-05-24 | 长春捷翼汽车零部件有限公司 | Charging control method and device for electric vehicle |
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| CN105552988B (en) * | 2015-12-09 | 2018-07-03 | 歌尔股份有限公司 | Charge control method, device and the smartwatch of wearable electronic |
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