High and low temperature starting control method of energy storage type charging pile

Abstract

The invention discloses a high and low temperature start control method for an energy storage type charging pile. The method is based on cooperative work of an LED lamp, an EMS, a BMS, a TBOX and a background of the charging pile. When the charging pile is started, according to the environment temperature sent by the TBOX and the battery pack temperature sent by the BMS, it is judged that the charging pile enters a low-temperature cold start mode or a high-temperature hot start mode, and in the low-temperature cold start mode, the TMS is controlled to heat the battery pack to 30 DEG C; in the high-temperature hot start mode, the TMS is controlled to cool the battery pack to 25 DEG C, and meanwhile, the LED red lamp is controlled to flicker to prompt that charging cannot be conducted. In the high and low temperature starting mode, the EMS sends charging failure information to the background through the TBOX; and if the temperature of the battery pack does not reach the target temperature after 5 h, the charging pile is controlled to be shut down, and if the temperature of the battery pack reaches the target temperature, the EMS controls the charging pile to be restarted and sends rechargeable prompt information to the background through the TBOX. The method has the functions of high and low temperature starting mode configuration and starting temperature calibration, the charging efficiency can be improved, the state of the charging pile is monitored and reminded in real time, and the requirements of different scenes are met.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle charging, and in particular to a high and low temperature starting control method for an energy storage type charging pile. Background Art

[0002] With the vigorous development of the electric vehicle industry, energy storage charging piles, as an important charging facility, are increasingly widely used in the market. Energy storage charging piles come with battery packs, which can store electricity during low electricity consumption and charge electric vehicles during peak electricity consumption, effectively alleviating the pressure on the power grid. However, the performance of the battery pack is significantly affected by temperature. In a high temperature environment, the chemical reaction rate of the battery is accelerated, which may cause battery overheating, capacity decay and even safety hazards; in a low temperature environment, the chemical reaction rate inside the battery is reduced, the internal resistance of the battery increases, and the discharge capacity is greatly reduced, which seriously reduces the charging power and greatly prolongs the charging time of the car. When the temperature is too high or too low, the charging pile may not start and cannot charge the vehicle in time. Moreover, if the charging pile does not start and does not supply high voltage for a long time, the battery pack will be depleted, and replacing the battery pack will greatly increase the later maintenance cost of the charging pile.

[0003] At present, although there are some related technologies for charging pile temperature regulation, such as the thermal management system with patent number 202310066452.9, it only realizes the temperature regulation of the charging pile, but does not take into account the key problems such as low charging power and long charging time caused by abnormal battery pack temperature when starting the charging pile under high and low temperature conditions; a cold-resistant charging pile with patent number 201721515493.8 only realizes heating and cold-resistant temperature regulation under low temperature conditions, without taking into account the high temperature conditions, and cannot perform effective temperature regulation when starting the charging pile under low temperature conditions on rainy days. In addition, the existing technology fails to promptly remind the owner that the current charging pile cannot be charged or the charging power is too low or the charging speed is too slow when the temperature is too high or too low. Therefore, it is of great practical significance to develop a method that can effectively control the start-up of energy storage charging piles under high and low temperature environments, improve charging efficiency, reduce maintenance costs, and promptly feedback the charging status to car owners and maintenance personnel. Therefore, we propose a high and low temperature start-up control method for energy storage charging piles. Summary of the invention

[0004] The main purpose of the present invention is to propose a high and low temperature startup control method for an energy storage charging pile, which can effectively solve the problems in the background technology.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a high and low temperature startup control method for an energy storage charging pile, the method is based on the LED lights, EMS, BMS, TBOX and background collaboration of the charging pile, and includes the following steps:

[0006] Low-temperature cold start control: When the charging pile is started, EMS obtains the ambient temperature sent by TBOX and the battery pack temperature sent by BMS. If the battery pack temperature is between [-30, 0]°C and the ambient temperature is between [-30, 50]°C, EMS controls the charging pile to enter the low-temperature cold start mode, sends instructions to TMS to control it to heat the battery pack, and the heating temperature is set to 30°C. At the same time, the LED red light is controlled to flash;

[0007] High temperature hot start control: When the charging pile is started, if the battery pack temperature is between [35, 80]°C and the ambient temperature is between [-30, 50]°C, the EMS controls the charging pile to enter the high temperature hot start mode, controls the TMS to cool the battery pack, and the cooling temperature is set to 25°C. At the same time, the LED red light is controlled to flash;

[0008] Charging pile cannot charge warning information: If the charging pile is in low-temperature cold start mode or high-temperature hot start mode, EMS sends the charging pile cannot charge information to TBOX, and TBOX sends the information to the backend, which displays it on the web page and issues a warning; if the battery pack temperature still cannot reach the set target temperature after 5 hours, EMS sends the charging pile cannot charge information to TBOX again, and TBOX sends the information to the backend, which displays it on the web page and issues a warning, and EMS controls the charging pile to shut down;

[0009] Charging pile can be charged prompt information: If the charging pile is in low-temperature cold start mode or high-temperature hot start mode, the battery pack reaches the set target temperature after being heated or cooled by TMS, and EMS controls the charging pile to restart. After restarting, EMS sends the charging pile ready charging prompt information to TBOX, and TBOX sends the information to the background, which displays it on the web page after receiving the prompt signal.

[0010] As a further description of the above technical solution, the method also has a configuration function of high and low temperature startup mode, and the user can turn on or off the high and low temperature startup mode according to actual needs.

[0011] As a further description of the above technical solution, the method has a calibration function for the startup temperature, and the user can change the startup temperature to adapt to different usage scenarios.

[0012] As a further description of the above technical solution, when the TMS heats or cools the battery pack, a precise temperature control strategy is adopted to ensure that the temperature of the battery pack is stably close to the set target temperature.

[0013] As a further description of the above technical solution, the frequency and mode of flashing the LED red light adopt a unified standard to clearly and unambiguously convey to the user the information that the charging pile cannot be charged.

[0014] As a further description of the above technical solution, the warning information and prompt information displayed by the background on the Web page are traceable, which is convenient for maintenance personnel to query and analyze historical data.

[0015] As a further description of the above technical solution, the TBOX and the background transmit information through a stable and reliable communication protocol to ensure the accuracy and timeliness of the information.

[0016] As a further description of the above technical solution, before controlling the charging pile to shut down, the EMS will record and save various parameters of the charging pile for subsequent troubleshooting and analysis.

[0017] As a further description of the above technical solution, the method can operate stably in different seasons and different geographical environments to ensure the normal startup and charging functions of the energy storage charging pile.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Improve charging efficiency: By cooling and heating the charging pile when it is started, it is ensured that the charging pile can reach the maximum charging power when it is ready for charging after startup, thereby effectively shortening the charging time, improving the charging efficiency, and meeting the user's needs for fast charging.

[0020] 2. Real-time status monitoring and reminder: When the charging pile is started under high or low temperature conditions, the charging pile not only warns the owner through the flashing red LED light, but also sends the status information of whether the current charging is possible to the backend. This allows the charging pile maintenance personnel to monitor the status of the charging pile anytime and anywhere, and also reminds the owner that the current charging pile cannot be charged or the charging power is low or the charging time is long, so that the owner can arrange the charging plan reasonably.

[0021] 3. Flexible function configuration: The present invention has the configuration function of high and low temperature start-up mode and the calibration function of start-up temperature. Users can turn on or off the high and low temperature start-up mode and change the start-up temperature according to actual usage scenarios and needs. This flexibility enables the charging pile to charge the vehicle in a timely manner in various complex environments, improving the applicability and practicality of the charging pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a system architecture diagram of a high and low temperature startup control method for an energy storage charging pile of the present invention. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features and purpose effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1 The present invention provides a technical solution: a high and low temperature startup control method for an energy storage charging pile. The method is based on the LED lights, EMS (Energy Management System), BMS (Battery Management System), TBOX (Telematics Box, vehicle-mounted network terminal) and background of the charging pile. The various parts work together to achieve effective control of the high and low temperature startup of the energy storage charging pile. Here, Figure 1 The arrows in the figure indicate the direction of data transmission.

[0027] Low-temperature cold start control: When the charging pile is started, EMS will obtain the ambient temperature sent by TBOX and the battery pack temperature sent by BMS in real time. If the battery pack temperature is between [-30, 0]℃ and the ambient temperature is between [-30, 50]℃, EMS will control the charging pile to enter low-temperature cold start mode. After entering this mode, EMS will issue instructions to TMS (Thermal Management System) to control it to heat the battery pack and set the heating temperature to 30℃. At the same time, EMS controls the LED red light to flash, indicating to the outside world that the charging pile cannot currently charge the vehicle.

[0028] High temperature hot start control: When the charging pile is started, if the battery pack temperature is between [35, 80]℃ and the ambient temperature is between [-30, 50]℃, the EMS controls the charging pile to enter the high temperature hot start mode. In this mode, the EMS controls the TMS to cool the battery pack, sets the cooling temperature to 25℃, and controls the LED red light to flash, informing the user that the current charging pile cannot charge the vehicle.

[0029] Charging pile cannot be charged warning information: During the startup process of the charging pile, if it is in low-temperature cold start mode or high-temperature hot start mode, EMS will send TBOX a message that the charging pile cannot be charged. After receiving the information, TBOX sends it to the background. After receiving the prompt signal, the background will display it on the web page and issue a warning to inform the charging pile maintenance operator in time. In addition, if the charging pile is in low-temperature cold start mode or high-temperature hot start mode, and the battery pack temperature still cannot reach the set target temperature after 5 hours, EMS will send TBOX a message that the charging pile cannot be charged again. TBOX will still send the information to the background, and the background will display and warn on the web page. At the same time, EMS controls the charging pile to shut down to avoid the device being in an abnormal state for a long time.

[0030] Charging pile can be charged prompt information: If the charging pile is in low temperature cold start mode or high temperature hot start mode, the battery pack reaches the set target temperature after being heated or cooled by TMS, and then EMS controls the charging pile to restart. After restarting, EMS sends charging pile can be charged prompt information to TBOX, and TBOX sends this information to the background. After receiving the prompt signal, the background will display it on the web page to inform the charging pile maintenance operator, and it is also convenient for the owner to know the charging status of the charging pile.

[0031] It should be noted that the present invention is a high and low temperature startup control method for an energy storage charging pile, and the specific steps are:

[0032] Implementation steps of low-temperature cold start control: In actual application scenarios, when the charging pile is connected to the power supply and started, the EMS starts working and continuously receives the ambient temperature data collected by TBOX and the battery pack temperature data fed back by BMS. Assume that at a certain moment, the ambient temperature sent by TBOX is -10℃, and the battery pack temperature sent by BMS is -5℃. These two temperature values ​​meet the conditions that the battery pack temperature is between [-30, 0]℃ and the ambient temperature is between [-30, 50]℃. At this time, the EMS determines to enter the low-temperature cold start mode. EMS immediately sends a heating instruction to TMS. After receiving the instruction, TMS starts the heating device to heat the battery pack and stabilizes the heating temperature at 30℃. At the same time, EMS sends a signal to the LED light control circuit to make the LED red light start flashing, indicating to the owner and surrounding personnel in an intuitive way that the charging pile cannot currently charge the vehicle.

[0033] High-temperature hot start control implementation steps: Also during the charging pile startup process, if the ambient temperature collected by TBOX is 30°C, and the battery pack temperature fed back by BMS is 40°C, which meets the setting conditions that the battery pack temperature is between [35, 80]°C and the ambient temperature is between [-30, 50]°C, EMS controls the charging pile to enter the high-temperature hot start mode. EMS sends a cooling command to TMS, and TMS starts the cooling device to cool the battery pack and sets the temperature to 25°C. At the same time, the red LED light starts flashing, prompting the user that the current charging pile is not available for charging.

[0034] Implementation steps of the warning message of the charging pile being unable to charge: When the charging pile is in low-temperature cold start mode or high-temperature hot start mode, EMS will send the charging pile unable to charge information to TBOX according to the preset logic. For example, in the low-temperature cold start mode, if after a period of time (such as 3 hours), the battery pack temperature fed back by BMS still does not reach 30°C, EMS will send the information that it cannot be charged to TBOX. TBOX sends this information to the background server via a wireless network. After receiving the information, the background server displays the warning information in a striking manner on the web page, such as a red warning box popping up, prompting "A charging pile is in an abnormal state and cannot be charged. Please maintain it in time", and an alarm sounds to notify the charging pile maintenance operator to handle it. If the battery pack temperature still does not reach the target temperature after 5 hours, in addition to sending the information that it cannot be charged to TBOX again, EMS will also control the charging pile to shut down to prevent damage caused by long-term abnormal operation of the equipment.

[0035] Implementation steps of the charging pile charging prompt information: In low-temperature cold start mode or high-temperature hot start mode, when TMS heats or cools the battery pack to the set target temperature, EMS will control the charging pile to restart. After the restart is completed, EMS sends a charging pile charging prompt information to TBOX. TBOX sends this information to the background, and the background updates the charging pile status on the web page, showing "a charging pile has returned to normal and can be charged", which is convenient for maintenance personnel and car owners to understand the real-time status of the charging pile.

[0036] Compared with the existing high and low temperature starting control method of energy storage charging piles, the present invention has high and low temperature starting mode configuration and starting temperature calibration function, which can improve charging efficiency, monitor and remind the status of charging piles in real time, and meet the needs of different scenarios.

[0037] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high and low temperature startup control method for an energy storage charging pile, characterized in that: The method is based on the LED lights, EMS, BMS, TBOX and background collaboration of the charging pile, and includes the following steps: Low-temperature cold start control: When the charging pile is started, EMS obtains the ambient temperature sent by TBOX and the battery pack temperature sent by BMS. If the battery pack temperature is between [-30, 0]°C and the ambient temperature is between [-30, 50]°C, EMS controls the charging pile to enter the low-temperature cold start mode, sends instructions to TMS to control it to heat the battery pack, and the heating temperature is set to 30°C. At the same time, the LED red light is controlled to flash; High temperature hot start control: When the charging pile is started, if the battery pack temperature is between [35, 80]°C and the ambient temperature is between [-30, 50]°C, the EMS controls the charging pile to enter the high temperature hot start mode, controls the TMS to cool the battery pack, and the cooling temperature is set to 25°C. At the same time, the LED red light is controlled to flash; Charging pile cannot charge warning information: If the charging pile is in low-temperature cold start mode or high-temperature hot start mode, EMS sends the charging pile cannot charge information to TBOX, and TBOX sends the information to the backend, which displays it on the web page and issues a warning; if the battery pack temperature still cannot reach the set target temperature after 5 hours, EMS sends the charging pile cannot charge information to TBOX again, and TBOX sends the information to the backend, which displays it on the web page and issues a warning, and EMS controls the charging pile to shut down; Charging pile can be charged prompt information: If the charging pile is in low-temperature cold start mode or high-temperature hot start mode, the battery pack reaches the set target temperature after being heated or cooled by TMS, and EMS controls the charging pile to restart. After restarting, EMS sends the charging pile ready charging prompt information to TBOX, and TBOX sends the information to the background, which displays it on the web page after receiving the prompt signal.

2. The high and low temperature startup control method of the energy storage charging pile according to claim 1, characterized in that: The method also has a configuration function for high and low temperature startup modes, and the user can turn on or off the high and low temperature startup modes according to actual needs.

3. The high and low temperature startup control method of the energy storage charging pile according to claim 1, characterized in that: The method has a calibration function for the start-up temperature, and the user can change the start-up temperature to adapt to different usage scenarios.

4. The high and low temperature startup control method of the energy storage charging pile according to claim 1, characterized in that: When the TMS heats or cools the battery pack, a precise temperature control strategy is adopted to ensure that the temperature of the battery pack is stable and close to the set target temperature.

5. The high and low temperature startup control method of the energy storage charging pile according to claim 1, characterized in that: The frequency and mode of flashing the LED red light adopt a unified standard to clearly and unambiguously convey to the user that the charging pile cannot be charged.

6. The high and low temperature startup control method of the energy storage charging pile according to claim 1, characterized in that: The warning information and prompt information displayed on the web page by the background are traceable, which is convenient for maintenance personnel to query and analyze historical data.

7. The high and low temperature startup control method of the energy storage charging pile according to claim 1, characterized in that: The TBOX and the backend transmit information via a stable and reliable communication protocol to ensure the accuracy and timeliness of the information.

8. The high and low temperature startup control method of the energy storage charging pile according to claim 1, characterized in that: Before controlling the charging pile to shut down, the EMS will record and save various parameters of the charging pile for subsequent troubleshooting and analysis.

9. The high and low temperature startup control method of the energy storage charging pile according to claim 1, characterized in that: The method can operate stably in different seasons and different geographical environments, ensuring the normal startup and charging functions of the energy storage charging pile.

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