TMS target temperature control method based on energy storage type charging pile

Abstract

The invention discloses a TMS target temperature control method based on an energy storage type charging pile, and belongs to the technical field of energy storage type charging pile thermal management, and the method comprises the following steps: a power module, a battery pack and a TMS in the energy storage type charging pile are all connected in the same CAN bus, and are controlled by an EMS; temperature sensors are installed at a power module water inlet / outlet, a battery pack water inlet / outlet and a TMS water inlet / outlet, a related controller ECU obtains corresponding temperatures through the temperature sensors, and the water pipes are connected in series; according to the invention, by eliminating the temperature signal of the fault module or the temperature abnormal module, the condition that the TMS control temperature is abnormal due to the fault or temperature abnormity of one module or several modules is avoided, the accuracy and stability of the TMS control temperature are improved, the reliable operation of the energy storage type charging pile is ensured, and the energy storage type charging pile is suitable for popularization and application. The time for the whole pile to reach the optimal working temperature can be effectively shortened, the working efficiency of the energy storage type charging pile is improved, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal management of energy storage charging piles, and particularly to a TMS target temperature control method based on an energy storage charging pile. Background Art

[0002] During the operation of an energy storage charging pile, the thermal management system (TMS) is crucial for maintaining the stable operation and optimal performance of the system. Currently, there are various solutions for battery thermal management in the prior art. For example, a patent with the publication number 202210900049.7 for temperature control of thermal management of a hybrid battery locomotive, and a patent with the publication number 201711229460.1 for a power battery thermal management control method, a power battery thermal management system, and a vehicle. The patent with the publication number 202210900049.7 controls the operation of the air conditioning unit based on the maximum temperature, minimum temperature, and average temperature of the battery sampled by temperature sensors. However, if there is a problem with the temperature sensor sampling, the control system will send an incorrect temperature signal, which will directly affect the control accuracy of the thermal management system and further affect the normal operation and safety of the energy storage charging pile. The patent with the publication number 201711229460.1 only considers the optimization of energy consumption and does not fully consider the requirement of the TMS to bring the system to the optimal working temperature range in the shortest time, which may cause the energy storage charging pile to not quickly enter the optimal working state at the initial stage of operation, affecting the charging efficiency and the service life of the equipment. Summary of the Invention

[0003] The purpose of the present invention is to provide a TMS target temperature control method based on an energy storage charging pile to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A TMS target temperature control method based on an energy storage charging pile includes the following steps: The power module, battery pack, and TMS in the energy storage charging pile are all connected to the same CAN bus and controlled by the EMS; Temperature sensors are installed at the inlet and outlet of the power module, the inlet and outlet of the battery pack, and the inlet and outlet of the TMS. The relevant controller ECU obtains the corresponding temperatures through these temperature sensors, and the water pipe connection method is in series;

[0005] When the entire charging pile is working, the EMS first detects whether all the power modules, battery packs, and TMS are online. If there is a situation where a certain power module, several power modules, a certain battery pack, or several battery packs are not online, the EMS reports a Timeout fault of the response module and no longer determines the target temperature output by the TMS based on the temperature signals at the inlet and outlet of the offline module;

[0006] If the temperature feedback from a certain power module, several power modules, a certain battery pack, or several battery packs exceeds the maximum temperature allowed for the entire pile to operate, or is lower than the minimum temperature for the entire pile to operate, the EMS will no longer determine the target temperature output by the TMS based on the temperature signals of the inlet and outlet water of the temperature anomaly module;

[0007] The EMS detects the temperatures of the inlets and outlets of all power modules and battery packs, takes the minimum value Tmin and the maximum value Tmax (Tmin ≤ Tmax), and controls the working mode and target temperature of the TMS according to the values of Tmin and Tmax according to the following rules: If Tmax < 25°C, the EMS controls the TMS to enter the heating cycle mode, and the target temperature output by the TMS is 30°C. When Tmin > 25°C, it enters the self-circulation mode, and the target temperature is 27.5°C;

[0008] If Tmin > 30°C, the EMS controls the TMS to enter the cooling cycle mode, and the target temperature output by the TMS is 25°C. When Tmax < 30°C, it enters the self-circulation mode, and the target temperature is 27.5°C;

[0009] If 25°C < Tmax < 30°C and Tmin < 25°C, the EMS controls the TMS to enter the heating cycle mode, and the target temperature is 30°C. When Tmin > 25°C, it enters the self-circulation mode, and the target temperature is 27.5°C;

[0010] If 25°C < Tmax < 30°C and Tmin ≥ 25°C, the EMS controls the TMS to enter the self-circulation mode, and the target temperature is 27.5°C;

[0011] If Tmax > 30°C and Tmin < 25°C, the EMS first controls the TMS to enter the self-circulation mode. After 1 minute, the temperature is detected again. If Tmax > 30°C and Tmin < 25°C, the EMS reports a water circulation temperature anomaly fault;

[0012] If Tmax > 30°C and 25°C < Tmin < 30°C, the EMS controls the TMS to enter the self-circulation mode, and the target temperature is 27.5°C.

[0013] Preferably, the optimal temperature for the entire pile to work is 25°C - 30°C.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] By excluding the temperature signals of the faulty module or the temperature anomaly module, the present invention avoids the situation that the TMS controls the temperature abnormally due to a certain module or several modules reporting faults or temperature anomalies, improves the accuracy and stability of the TMS to control the temperature, and thus ensures the reliable operation of the energy storage charging pile.

[0016] The present invention comprehensively considers the temperature conditions of each module in the system, formulates a reasonable control strategy according to different temperature ranges, makes the control logic more scientific and reasonable, can effectively shorten the time for the entire pile to reach the optimal working temperature, and improves the working efficiency and service life of the energy storage charging pile. Description of the Drawings

[0017] Figure 1 Structural schematic of the TMS target temperature control method based on the energy storage charging pile according to the embodiment of the present invention Figure 1 ;

[0018] Figure 2 Structural schematic of the TMS target temperature control method based on the energy storage charging pile according to the embodiment of the present invention Figure 2 . Detailed Embodiment

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figure 1 - Figure 2 , the embodiment of the present invention provides a TMS target temperature control method based on an energy storage charging pile, including the following steps: The power module, battery pack, and TMS in the energy storage charging pile are all connected to the same CAN bus and are controlled by the EMS; Temperature sensors are installed at the inlet and outlet of the power module, the inlet and outlet of the battery pack, and the inlet and outlet of the TMS. The relevant controller ECU obtains the corresponding temperature through these temperature sensors, and the water pipe connection method is in series;

[0021] When the entire pile is working, the EMS first detects whether all the power modules, battery packs, and TMS are online. If there is a situation where a certain power module, several power modules, a certain battery pack, or several battery packs are not online, the EMS reports a Timeout fault of the response module and no longer judges the target temperature output by the TMS based on the temperature signals at the inlet and outlet of the offline module;

[0022] If the temperature feedback by a certain power module, several power modules, a certain battery pack, or several battery packs exceeds the maximum temperature allowed for the entire pile to operate, or is lower than the minimum temperature for the entire pile to operate, the EMS no longer judges the target temperature output by the TMS based on the temperature signals at the inlet and outlet of the temperature abnormal module;

[0023] The EMS detects the inlet and outlet water temperatures of all power modules and battery packs, takes the minimum value Tmin and the maximum value Tmax (Tmin ≤ Tmax), and controls the working mode and target temperature of the TMS according to the values of Tmin and Tmax according to the following rules: If Tmax < 25°C, the EMS controls the TMS to enter the heating cycle mode, and the target temperature output by the TMS is 30°C. When Tmin > 25°C, it enters the self-circulation mode, and the target temperature is 27.5°C;

[0024] If Tmin > 30°C, the EMS controls the TMS to enter the cooling cycle mode, and the target temperature output by the TMS is 25°C. When Tmax < 30°C, it enters the self-circulation mode, and the target temperature is 27.5°C;

[0025] If 25°C < Tmax < 30°C and Tmin < 25°C, the EMS controls the TMS to enter the heating cycle mode, and the target temperature is 30°C. When Tmin > 25°C, it enters the self-circulation mode, and the target temperature is 27.5°C;

[0026] If 25°C < Tmax < 30°C and Tmin ≥ 25°C, the EMS controls the TMS to enter the self-circulation mode, and the target temperature is 27.5°C;

[0027] If Tmax > 30°C and Tmin < 25°C, the EMS first controls the TMS to enter the self-circulation mode. After 1 minute, the temperature is detected again. If Tmax > 30°C and Tmin < 25°C, the EMS reports a water circulation temperature anomaly fault;

[0028] If Tmax > 30°C and 25°C < Tmin < 30°C, the EMS controls the TMS to enter the self-circulation mode, and the target temperature is 27.5°C.

[0029] Among them, the optimal temperature for the whole pile to work is 25°C - 30°C.

[0030] In practical applications, when the energy storage charging pile starts to work, the EMS operates according to the process of the above control method. First, the EMS detects whether all power modules, battery packs, and the TMS are online through the CAN bus, and at the same time obtains the temperature data collected by the temperature sensors at the inlet and outlet of each module.

[0031] Suppose at a certain moment, the EMS detects that a certain power module is not online. At this time, the EMS immediately reports a Timeout fault of this power module, and in the subsequent process of determining the TMS target temperature, the temperature signal at the inlet and outlet of this power module is no longer referred to.

[0032] Next, the EMS analyzes the inlet and outlet water temperatures of all normally online power modules and battery packs to obtain the minimum value Tmin and the maximum value Tmax. If Tmax = 23°C and Tmin = 20°C, according to the control strategy, Tmax < 25°C, the EMS controls the TMS to enter the heating cycle mode and sets the target temperature output by the TMS to 30°C. During the heating process, the temperature sensor continuously monitors the temperature change. When Tmin rises to 26°C, meeting the condition of Tmin > 25°C, the EMS controls the TMS to enter the self-circulation mode and adjusts the target temperature to 27.5°C to maintain the system temperature stability.

[0033] In another case, if the temperature feedback from a certain battery pack is detected to exceed the maximum temperature allowed for the entire pile to operate, the EMS also no longer determines the target temperature output by the TMS based on the inlet and outlet water temperature signals of this battery pack, and continues to analyze and control according to the temperature data of other normal modules.

[0034] Through the above implementation manners, the TMS target temperature control method of the present invention based on an energy storage charging pile can effectively achieve precise control of the temperature of the energy storage charging pile during actual operation, ensuring its stable and efficient operation.

[0035] Parts not involved in the present invention are the same as or can be implemented using existing technologies. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A TMS target temperature control method based on an energy storage charging pile, characterized in that: It includes the following steps: The power module, battery pack, and TMS in the energy storage type charging pile are all connected to the same CAN bus and controlled by the EMS; temperature sensors are installed at the water inlets and outlets of the power module, battery pack, and TMS, and the relevant controller ECU obtains the corresponding temperatures through these temperature sensors, and the water pipe connection method is in series; When the entire pile is working, the EMS first detects whether all power modules, battery packs, and TMS are online. If there is a situation where a certain power module, several power modules, a certain battery pack, or several battery packs are not online, the EMS reports the Timeout fault of the response module and no longer judges the target temperature output by the TMS based on the temperature signals of the water inlets and outlets of the offline module; If the temperature feedback by a certain power module, several power modules, a certain battery pack, or several battery packs exceeds the maximum temperature allowed for the operation of the entire pile or is lower than the minimum temperature for the operation of the entire pile, the EMS no longer judges the target temperature output by the TMS based on the temperature signals of the water inlets and outlets of the temperature abnormal module; The EMS detects the temperatures of the water inlets and outlets of all power modules and battery packs, takes the minimum value Tmin and the maximum value Tmax (Tmin ≤ Tmax), and controls the working mode and target temperature of the TMS according to the following rules based on the values of Tmin and Tmax: If Tmax < 25°C, the EMS controls the TMS to enter the heating cycle mode, and the target temperature output by the TMS is 30°C. When Tmin > 25°C, it enters the self-circulation mode, and the target temperature is 27.5°C; If Tmin > 30°C, the EMS controls the TMS to enter the cooling cycle mode, and the target temperature output by the TMS is 25°C. When Tmax < 30°C, it enters the self-circulation mode, and the target temperature is 27.5°C; If 25°C < Tmax < 30°C and Tmin < 25°C, the EMS controls the TMS to enter the heating cycle mode, and the target temperature is 30°C. When Tmin > 25°C, it enters the self-circulation mode, and the target temperature is 27.5°C; If 25°C < Tmax < 30°C and Tmin ≥ 25°C, the EMS controls the TMS to enter the self-circulation mode, and the target temperature is 27.5°C; If Tmax > 30°C and Tmin < 25°C, the EMS first controls the TMS to enter the self-circulation mode, and re-detects the temperature after 1 minute. If Tmax > 30°C and Tmin < 25°C, the EMS reports the water circulation temperature abnormal fault; If Tmax > 30°C and 25°C < Tmin < 30°C, the EMS controls the TMS to enter the self-circulation mode, and the target temperature is 27.5°C.

2. A TMS target temperature control method based on an energy storage charging pile according to claim 1, characterized in that: The optimal temperature for the operation of the entire pile is 25°C - 30°C.

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