CN114801809A

CN114801809A - Storage and charging integrated equipment thermal management system and control method thereof

Info

Publication number: CN114801809A
Application number: CN202210578263.5A
Authority: CN
Inventors: 郭亚东; 胡浩; 童天辰; 贾宇鹏
Original assignee: Shitu Technology Hangzhou Co ltd
Current assignee: Shitu Technology Hangzhou Co ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-07-29

Abstract

The invention discloses a storage and charging integrated equipment thermal management system and a control method thereof. The heat management system comprises a circulating pipeline, an electronic water pump, a refrigerating system, a battery water cooling plate and a proportion regulating valve; the storage and charging integrated equipment at least comprises an energy storage battery and a charging gun; the circulating pipeline comprises a public pipeline, a battery cooling pipeline and a gun line pipeline, the battery cooling pipeline is communicated with the battery water cooling plate, and part of the gun line pipeline is arranged in the charging gun; the electronic water pump is arranged on the circulating pipeline, the refrigerating system is arranged on the public pipeline, and the proportional control valve is arranged on the battery cooling pipeline. According to the invention, the thermal management system can realize the thermal management requirements of the equipment under different working conditions according to the actual working states of the charging gun and the energy storage battery, and the intelligence of the thermal management system is improved. Meanwhile, the temperature of the charging gun and the temperature of the energy storage battery can be adjusted simultaneously by adjusting the opening of the proportional control valve, the integration level of the heat management system is improved, and the system arrangement performance is better and the economical efficiency is better.

Description

Storage and charging integrated equipment thermal management system and control method thereof

Technical Field

The embodiment of the invention belongs to the technical field of electric automobile charging, and particularly relates to a storage and charging integrated equipment thermal management system and a control method thereof.

Background

With the rapid development of new energy industry, the occupancy of new energy electric vehicles in the automobile market is greatly increased, and the construction strength of the new energy electric vehicle charging and energy storage integrated equipment is gradually increased. When the storage and charging integrated equipment charges the stored electric energy and the new energy automobile, the problem that relevant parts such as a charging gun line and an energy storage battery generate heat seriously exists, and the performance and the use safety of the charging and energy storage integrated equipment are influenced. In the prior art, the temperature of a charging gun is reduced by increasing the diameter of a cable of the charging gun, the weight of the charging gun is increased, the use by a user is inconvenient, the working mode of the existing matching thermal management system is single, and a more efficient, higher-integration-level and more intelligent integrated thermal management system and a control method are urgently needed to meet the overall thermal management requirements of the charging gun and an energy storage battery of the storage and charging integrated equipment under different working conditions.

Disclosure of Invention

In view of this, embodiments of the present invention provide a storage and charging integrated device thermal management system and a control method thereof, so as to improve the integration level of the device thermal management system and meet thermal management requirements under different operations.

In a first aspect, an embodiment of the present invention provides a storage and charging integrated device thermal management system, including a circulation pipeline, an electronic water pump, a refrigeration system, a battery water-cooling plate, and a proportional control valve; the storage and charging integrated equipment at least comprises an energy storage battery and a charging gun;

the circulating pipeline comprises a public pipeline, a battery cooling pipeline and a gun line pipeline, and the battery cooling pipeline and the gun line pipeline are respectively communicated with the public pipeline; the battery water-cooling plate is attached to the energy storage battery; part of the gun line pipeline is arranged in the charging gun;

the electronic water pump is arranged on the circulating pipeline and used for driving cooling liquid to flow in the circulating pipeline; the refrigeration system is arranged on the public pipeline and is used for cooling the cooling liquid in the public pipeline; the proportion regulating valve is arranged on the battery cooling pipeline and used for distributing the flow of the cooling liquid in the gun line pipeline and the battery cooling pipeline.

In a second aspect, an embodiment of the present invention further provides a control method for a thermal management system of a storage and charging integrated device, which is applicable to the thermal management system of the storage and charging integrated device in the first aspect of the present invention, where the control method includes:

acquiring a first heat load temperature at a charging gun and a second heat load temperature at the energy storage battery in real time;

and adjusting the opening of a proportional adjusting valve according to the first heat load temperature and the second heat load temperature, and adjusting the working states of the electronic water pump and the refrigerating system to adjust the temperature of the charging gun and/or the energy storage battery.

In the embodiment of the invention, the storage and charging integrated equipment heat management system comprises a circulating pipeline, an electronic water pump, a refrigerating system, a battery water cooling plate and a proportional control valve; the storage and charging integrated equipment at least comprises an energy storage battery and a charging gun. The battery cooling pipeline is communicated with the battery water cooling plate, and the battery water cooling plate is attached to the energy storage battery; part of the gun line pipeline is arranged in the charging gun; the cooling liquid passing through the refrigerating system can flow in the circulating pipeline under the driving of the electronic water pump, and the proportion regulating valve is arranged on the battery cooling pipeline and used for regulating the flow in the battery cooling pipeline. Through the arrangement mode, the thermal management system can simultaneously regulate the temperature of components with heat requirements in the storage and charging integrated equipment, such as a charging gun, an energy storage battery and the like, so that the integration level of the thermal management system is greatly improved, and the system is better in arrangement performance and economical efficiency; meanwhile, the flow in the battery cooling pipeline and the gun line pipeline is adjusted by adjusting the opening of the proportional control valve, the thermal management system can meet the thermal management requirements of the storage and charging integrated equipment under different working conditions according to the actual working states of the charging gun and the energy storage battery, and the intelligence of the thermal management system is improved.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 is a schematic structural diagram of a thermal management system of a storage and charging integrated device according to an embodiment of the present invention;

fig. 2 is a control logic diagram of a thermal management system of a storage and charging integrated device according to an embodiment of the present invention;

fig. 3 is a flowchart of a control method of a thermal management system of a storage and charging integrated device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be fully described by the detailed description with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, not all embodiments, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without inventive efforts fall within the scope of the present invention.

Based on the defects of the prior art, an embodiment of the present invention provides a storage and charging integrated device thermal management system, so as to improve the integration level of the storage and charging integrated device thermal management system and meet thermal management requirements under different operations, where fig. 1 is a schematic structural diagram of the storage and charging integrated device thermal management system provided by an embodiment of the present invention, and as shown in fig. 1, the thermal management system includes: the system comprises a circulating pipeline 2, an electronic water pump 7, a refrigerating system 3, a battery water cooling plate 4 and a proportion regulating valve 5; the storage and charging integrated equipment at least comprises an energy storage battery (not shown in the figure) and a charging gun 1;

the circulating pipeline 2 comprises a public pipeline 21, a battery cooling pipeline 22 and a gun line pipeline 23, wherein the battery cooling pipeline 22 and the gun line pipeline 23 are respectively communicated with the public pipeline 21; the battery water cooling plate 4 is attached to the energy storage battery; a part of the gun line pipe 23 is arranged in the charging gun 1;

the electronic water pump 7 is arranged on the circulating pipeline 2 and used for driving cooling liquid to flow in the circulating pipeline 2; the refrigerating system 3 is arranged on the public pipeline 21 and is used for cooling the cooling liquid in the public pipeline 21; a proportional regulating valve 5 is provided on the battery cooling duct 22 for distributing the flow rates of the coolant in the line pipe 23 and the battery cooling duct 22.

In this embodiment, the storage and charging integrated device generally refers to a charging and energy storage integrated device of an electric vehicle, and when the storage and charging integrated device is used, the temperature of internal components may change, for example, heat may be generated, and the like. Wherein, store up, fill among the integration equipment including energy storage battery and rifle that charges at least.

Wherein, when charging for electric automobile, the main part of rifle 1 that charges is connected with electric automobile charging end, stores up, fills integrated equipment and passes through rifle 1 that charges and transmit electric energy to electric automobile, charges for electric automobile. When the external device does not need to be charged, the storage and charging integrated device can also store electric energy in an energy storage battery (not shown in the figure). In the application process of the charging gun 1 and/or the energy storage battery, the charging gun 1 and/or the energy storage battery may generate heat, and the thermal management system in this embodiment may adjust the temperature of the charging gun 1 and/or the energy storage battery when the charging gun 1 and/or the energy storage battery generate heat, so that the charging gun 1 and/or the energy storage battery operate at normal temperature. Of course, if other components in the storage and charging integrated device also have the thermal management requirement, the thermal management system in this embodiment may also perform temperature regulation and control on the other components accordingly.

Specifically, as shown in fig. 1, in the embodiment of the present invention, the thermal management system includes: the system comprises a circulating pipeline 2, an electronic water pump 7, a refrigerating system 3, a battery water cooling plate 4 and a proportion regulating valve 5. The circulation pipe 2 is used for providing a circulation channel for the cooling liquid, and the arrows on the circulation pipe 2 in the figure represent the flowing direction of the cooling liquid. The electronic water pump 7 is used for driving the cooling liquid to flow in the circulating pipeline 2. Still be provided with water tank 6 among the thermal management system, the liquid outlet 61 and the circulating line 2 intercommunication of water tank 6 to provide the coolant liquid in the circulating line 2, the return air mouth 62 and the circulating line 2 intercommunication of water tank 6 for the air in the circulating line 2 is discharged, is favorable to the coolant liquid circulation unobstructed.

Specifically, still referring to fig. 1, the circulation duct 2 includes a common duct 21, a battery cooling duct 22, and a gun line duct 23, the battery cooling duct 22 and the gun line duct 23 being respectively communicated with the common duct 21, and it is also understood that the battery cooling duct 22 and the gun line duct 23 are disposed in parallel and are respectively connected in series with the common duct 21. Battery cooling tube 22 and battery water-cooling board 4 intercommunication, the coolant liquid in the circulating line 2 can be transmitted to battery water-cooling board 4 through battery cooling tube 22, and the attached energy storage battery setting of part battery water-cooling board 4, coolant liquid flow in battery water-cooling board 4 realizes with the heat exchange of energy storage battery to adjust the temperature of energy storage battery department.

Still referring to fig. 1, a part of the gun line pipeline 23 is disposed in the charging gun 1, and the charging gun 1 includes a charging gun main body, i.e., a charging gun head, and a charging cable, where the charging cable is used to transmit electric energy to the charging gun head to charge the electric vehicle. In the embodiment of the invention, the gun line pipeline 23 is arranged in the charging gun 1 and is connected with the charging gun main body, part of the gun line pipeline 23 can be integrated with a charging cable, and a copper wire used for transmitting electricity in the charging cable is attached to the outer surface of the gun line pipeline 23. The coolant in the common duct 21 enters the line duct 23 and flows in the line duct 23, effecting heat exchange with the charging gun 1 to regulate the temperature of the charging cable and the charging gun body of the charging gun 1.

Still referring to fig. 1, the refrigeration system 3 is disposed in the common duct 21 and is configured to adjust the temperature of the cooling liquid flowing in the common duct 21, when the temperature of the charging gun 1 and/or the energy storage battery is high, the cooling liquid in the common duct 21 is cooled by the refrigeration system 3, and the cooled cooling liquid enters the gun tube duct 23 and/or the battery water cooling plate 4 to cool the charging gun 1 and/or the energy storage battery.

Specifically, as shown in fig. 1, the battery water cooling plate 4 includes a water inlet 41 and a water outlet 42, and the battery water cooling pipeline includes a first portion 221 communicating with the battery water cooling plate water inlet 41 and a second portion 222 communicating with the battery water cooling plate water outlet 42. The first part 221 is communicated with the common pipeline 21 and the water inlet 41 of the battery water cooling plate; the second portion 222 communicates the common duct 21 with the battery water-cooled panel outlet 42. The process of cooling the energy storage battery can be described as follows: the cooling liquid in the common pipe 21 is cooled in the refrigeration system 3, the cooled cooling liquid flows from the common pipe 21 to the first part 221, enters from the water inlet 41 of the battery water-cooling plate and cools the energy storage battery, because heat exchange is carried out in the battery water-cooling plate 4, the temperature of the cooling liquid flowing out from the water outlet 42 of the battery water-cooling plate rises, the cooling liquid with higher temperature flows into the common pipe 21 again through the second part 222 and is cooled again after entering the refrigeration system 3, and therefore the circulating cooling of the energy storage battery is completed.

Correspondingly, with continued reference to fig. 1, the gun line pipe 23 includes a water inlet end 231 and a water outlet end 232, the water inlet end 231 and the water outlet end 232 of the gun line pipe are respectively connected to two ends of the public pipe 21, and the process of cooling the charging gun 1 can be described as follows: the coolant in the public pipeline 21 is cooled in the refrigerating system 3, the cooled coolant enters the line pipe channel 23 from the public pipeline 21 through the line pipe channel water inlet end 231, the charging gun 1 is cooled, the temperature of the coolant in the line pipe channel 23 rises due to heat exchange in the charging gun 1, the coolant with higher temperature flows into the public pipeline 21 again through the line pipe channel water outlet end 232, and the coolant enters the refrigerating system 3 and is cooled again, so that the circulating cooling of the charging gun 1 is completed.

With continued reference to fig. 1, it is worth mentioning that in the embodiment of the present invention, a proportional regulating valve 5 is provided in the battery cooling duct 22, and by adjusting the opening degree of the proportional regulating valve 5, the flow rates of the cooling liquid in the gun duct 23 and the battery cooling duct 22 can be distributed, that is, the flow rates of the cooling liquid at the charging gun 1 and the energy storage battery can be adjusted.

Specifically, as shown in fig. 1, since the proportional regulating valve 5 is provided in the battery cooling pipe 22, if the proportional regulating valve 5 is in the fully closed state, the coolant in the circulation pipe 2 does not enter the battery water cooling plate 4, and the coolant circulates only in the common pipe 21 and the gun tube pipe 23; if the proportional control valve 5 is in a fully open state, because the diameter of the gun line pipeline 23 is smaller and the diameter of the battery cooling pipeline 22 is much larger than that of the gun line pipeline 23, when the proportional control valve 5 is fully open, the cooling liquid in the circulating pipeline 2 does not enter the gun line pipeline 23 and flows into the battery cooling pipeline 22 and then enters the battery water cooling plate 4, and at the moment, the cooling liquid can circulate in the common pipeline 21, the battery cooling pipeline 22 and the battery water cooling plate 4; when the proportional control valve 5 is in the half-open state, the coolant in the circulation duct 2 flows through the gun tube duct 23 and the battery cooling duct 22 at the same time, and when the opening degree of the proportional control valve 5 changes, the flow rates of the coolant in the gun tube duct 23 and the battery cooling duct 22 also change.

Wherein, proportional control valve 5 shown in fig. 1 is disposed on first partial battery cooling pipeline 22 and is close to rifle pipeline water inlet end 231, and in the practical application process, a person skilled in the art can also set the position of proportional control valve 5 according to actual demand, and only when it is required to control the opening of proportional control valve 5 to change, the flow of the cooling liquid in battery cooling pipeline 22 and/or rifle pipeline 23 can also be changed correspondingly.

Since the embodiment of the present invention mainly provides a thermal management system of a storage and charging integrated device, fig. 1 only shows components related to thermal management of the storage and charging integrated device and a connection manner among the components, and does not show all component structures in the storage and charging integrated device.

Optionally, with continuing reference to fig. 1, in a possible embodiment, the refrigeration system 3 may comprise: a heat exchanger 31, a compressor 32, a condenser 33, a condensing fan 34, an expansion valve 35, and a refrigerant pipe 36; the heat exchanger 31 comprises a refrigerant circulation cavity 37 and a cooling liquid circulation cavity 38, a refrigerant pipeline 36 is communicated with the refrigerant circulation cavity 37, and a common pipeline 21 is communicated with the cooling liquid circulation cavity 38; the refrigerant circulation chamber 37, the compressor 32, the condenser 33, and the expansion valve 35 are connected in series in this order through the refrigerant pipe 36; the condenser fan 34 is used to drive air circulation to achieve heat exchange with the condenser 33.

Specifically, as shown in fig. 1, the refrigeration system 3 may be composed of a heat exchanger 31, a compressor 32, a condenser 33, a condensing fan 34, an expansion valve 35, and a refrigerant pipe 36, the heat exchanger 31 includes two parts, one part is a refrigerant circulation chamber 37, and the refrigerant circulation chamber 37 is communicated with the refrigerant pipe 36; the other part is a coolant circulation chamber 38, and the coolant circulation chamber 38 communicates with the common pipe 21 in the circulation pipe 2. During operation of the refrigeration system 3, refrigerant is circulated through the refrigerant line 36 to cool the coolant flowing through the coolant flow cavity 38 of the heat exchanger 31, and the temperature of the coolant flowing through the coolant flow cavity 38 is reduced and transmitted to the rifle strap line 23 and/or the battery cooling line 22.

In the direction of the flow of the refrigerant, the refrigerant circulation chamber 37, the compressor 32, the condenser 33, and the expansion valve 35 are connected in series in this order by the refrigerant pipe 36, and the condensing fan 34 is provided on the side close to the condenser 33. The arrows on the refrigerant pipe 36 in the figure represent the flow direction of the refrigerant. The working principle of the refrigeration system 3 is vapor compression refrigeration, and the specific working process can be roughly referred to as follows: when cooling liquid is needed to be cooled, the compressor 32 and the condensing fan 34 in the refrigeration system 3 are controlled to be started, refrigerant in the refrigerant pipeline 36 is subjected to adiabatic compression by the compressor 32 to become high-temperature high-pressure superheated steam, then the high-temperature high-pressure superheated steam is pressed into the condenser 33, constant-pressure cooling is carried out in the condenser 33, heat is released to the refrigerant, then the refrigerant is cooled to be supercooled liquid refrigerant, the liquid refrigerant is subjected to adiabatic throttling by the expansion valve 35 to become low-pressure liquid refrigerant, then the low-pressure liquid refrigerant enters the refrigerant circulation cavity 37 of the heat exchanger 31, the liquid refrigerant is evaporated to be gas in the refrigerant circulation cavity 37 to absorb heat of cooling liquid in the cooling liquid circulation cavity 38 of the heat exchanger 31, and therefore the cooling liquid in the circulation pipeline 2 is cooled. The low-pressure gaseous refrigerant discharged from the refrigerant passing chamber 37 is sucked into the compressor 32, and thus the cycle is operated. When the refrigeration system 3 is in operation, the condensing fan 34 is turned on to drive the air to circulate, so as to realize the heat exchange between the condenser 33 and the external environment, and dissipate the heat at the condenser 33 to the environment, so as to control the temperature in the refrigerant pipeline 36.

Optionally, in a possible embodiment, the thermal management system may further include a thermal management system controller (not shown in the figure); the heat management system controller is respectively and electrically connected with the electronic water pump 7, the refrigerating system 3, the proportional control valve 5, an energy storage battery (not shown in the figure) and the charging gun 1; the thermal management system controller adjusts the opening degree of the proportional control valve 5 according to the first heat load temperature at the charging gun 1 and the second heat load temperature at the energy storage battery, and controls and starts the electronic water pump 7 and the refrigerating system 3 to cool the charging gun 1 and/or the energy storage battery.

Specifically, a thermal management system controller (not shown in the figure) is a main control module in the storage and charging integrated device thermal management system provided in the embodiment of the present invention, and the thermal management system controller may be integrated in the storage and charging integrated device thermal management system. The thermal management system controller can be respectively electrically connected with the charging gun 1, the refrigerating system 3, the energy storage battery and the proportional control valve 5 in the thermal management system, and controls the working states of the refrigerating system 3 and the proportional control valve 5 according to a first thermal load temperature at the charging gun 1 and a second thermal load temperature at the energy storage battery, when the first thermal load temperature and/or the second thermal load temperature are higher, for example, higher than a cooling threshold of the charging gun and/or a cooling threshold of the battery, the refrigerating system 3 is controlled to work, and after the temperature of the cooling liquid of the refrigerating system 3 is reduced, the cooling liquid flows into the charging gun 1 and/or the energy storage battery to cool the charging gun 1 and/or the energy storage battery.

A temperature sensor (not shown in the figure) can be arranged at the main body of the charging gun 1, and the temperature sensor is electrically connected with the thermal management system controller and is used for detecting the first heat load temperature of the charging gun 1 in real time and sending the first heat load temperature to the thermal management system controller; the second heat load temperature information of the energy storage battery can be detected through a Battery Management System (BMS) in the energy storage battery, and a heat management system controller acquires the second heat load temperature in the energy storage battery detected by the BMS in real time. It can be understood that the first heat load temperature and the second heat load temperature are not fixed values, but are real-time temperature information of the charging gun 1 and the energy storage battery when the storage and charging integrated equipment works.

It can be understood that, in the embodiment of the present invention, the temperature of the charging gun and the temperature of the energy storage battery in the storage and charging integrated device are regulated and controlled as an example, at this time, the first thermal load temperature corresponds to the temperature of the charging gun, and the second thermal load temperature corresponds to the temperature of the energy storage battery. When other components in the storage and charging integrated equipment need to be subjected to temperature regulation, the first heat load temperature and the second heat load temperature can correspond to the temperatures of the other components.

Optionally, in the embodiment of the present invention, the BMS may further feed back the highest temperature and the lowest temperature of the individual battery cells in the energy storage battery to the thermal management system controller, and the thermal management system controller may adjust the rotation speed of the electronic water pump 7 according to a difference between the highest temperature and the lowest temperature.

For example, the working process of the storage and charging integrated device thermal management system provided by the embodiment of the invention can be roughly described as follows: the thermal management system controller obtains a first thermal load temperature at the charging gun 1 and a second thermal load temperature at the energy storage battery in real time, and adjusts the opening of the proportional control valve 5 according to the first thermal load temperature at the charging gun 1 and the second thermal load temperature at the energy storage battery, so that the charging gun 1 and/or the energy storage battery are cooled through the refrigerating system 3.

Specifically, a charging gun cooling threshold and a battery cooling threshold may be preset in the thermal management system controller, where the charging gun cooling threshold may be a cooling temperature of the charging gun 1, and when the first thermal load temperature is below the charging gun cooling threshold, it indicates that the temperature of the charging gun 1 is in a normal temperature range; when the first heat load temperature is equal to or higher than the battery cooling threshold, it means that the charging gun 1 is at a high temperature and needs to be cooled. Correspondingly, the battery cooling threshold may be a cooling temperature of the energy storage battery, and when the second thermal load temperature is below the battery cooling threshold, it indicates that the energy storage battery is in a normal temperature range; when the second heat load temperature is at or above the battery cooling threshold, it indicates that the temperature of the energy storage battery is high and needs to be reduced. The specific setting values of the charging gun cooling threshold and the battery cooling threshold are not limited in the embodiments of the present invention, and can be set by a person skilled in the art according to actual situations.

When the first heat load temperature is greater than or equal to the cooling threshold of the charging gun and the second heat load temperature is less than the cooling threshold of the battery, the temperature of the charging gun 1 is higher, and the temperature of the energy storage battery is in a normal temperature range; at this time, the controller of the thermal management system can control the proportional control valve 5 to be closed, and simultaneously control the electronic water pump 7, the compressor 32 and the condensing fan 34 to work, the cooling liquid in the public pipeline 21 is cooled in the cooling liquid circulation cavity 38 of the heat exchanger 31, and the cooled cooling liquid enters the gun tube channel 23 through the water inlet end 231 of the gun tube channel and flows in the gun tube channel 23 to cool the charging gun 1.

When the first heat load temperature is lower than the cooling threshold of the charging gun and the second heat load temperature is greater than or equal to the cooling threshold of the battery, the temperature of the energy storage battery is higher, and the temperature of the charging gun 1 is in a normal temperature range; at the moment, the controller of the thermal management system can control the proportional control valve 5 to be opened to the maximum opening degree, and simultaneously control the electronic water pump 7, the compressor 32 and the condensing fan 34 to work, the cooling liquid in the public pipeline 21 is cooled in the cooling liquid circulation cavity 38 of the heat exchanger 31, the cooled cooling liquid enters the battery water cooling plate 4 from the water inlet 41 of the battery water cooling plate and flows in the battery water cooling plate 4, and the energy storage battery is cooled;

when the first heat load temperature is greater than or equal to the cooling threshold of the charging gun and the second heat load temperature is greater than or equal to the cooling threshold of the battery, it is indicated that the temperatures of the charging gun 1 and the energy storage battery are both high, at this time, the controller of the heat management system can adjust the proportional control valve 5 to a first opening degree according to the first heat load temperature and the second heat load temperature, and simultaneously control the electronic water pump 7, the compressor 32 and the condensing fan 34 to work, so that the cooling liquid in the common pipeline 21 is cooled and then simultaneously enters the gun pipeline 23 and the battery water cooling plate 4 to cool the charging gun 1 and the energy storage battery.

It should be noted that the first opening at this time may be an opening calibrated in advance, and does not refer to the opening of a specific proportional control valve 5, and when the magnitudes of the temperature values of the first heat load temperature and the second heat load temperature are different, the magnitude of the first opening is different. The corresponding relation between the first heat load temperature and the second heat load temperature and the opening of the proportional control valve can be preset, and after the numerical values of the first heat load temperature and the second heat load temperature are determined, the proportional valve can be adjusted to the calibrated first opening.

For example, if the difference between the first heat load temperature and the cooling threshold of the charging gun is larger, and the difference between the second heat load temperature and the cooling threshold of the battery is smaller, which indicates that the charging gun generates more heat and the cooling capacity demand is larger, the opening degree of the proportional control valve 5 may be controlled to allow more cooling fluid to flow to the gun conduit 23; instead, more coolant flows to the cell water-cooled plate 4.

The corresponding relation between the first heat load temperature and the second heat load temperature and the opening degree of the proportional control valve 5 can be determined in the experiment stage of the heat management system and stored in the heat management system controller, and in the actual application process of the heat management system, the heat management system controller adjusts the opening degree of the proportional control valve 5 according to the actual first heat load temperature and the actual second heat load temperature and the pre-established corresponding relation so as to meet the cooling requirements of the charging gun 1 and the energy storage battery at the same time.

Optionally, and still referring to fig. 1, in a possible embodiment, a water temperature sensor 24 may be further disposed in the circulation pipe 2 for detecting the temperature of the cooling liquid in the circulation pipe 2; the water temperature sensor 24 is electrically connected with a thermal management system controller, and the thermal management system controller adjusts the rotating speed of the compressor 32 and the electronic water pump 7 according to the first thermal load temperature, the second thermal load temperature and the temperature of the cooling liquid.

It should be noted that, in the embodiment of the present invention, a water temperature sensor 24 may be disposed in the circulation pipeline 2, and the water temperature sensor 24 detects the temperature of the cooling liquid in the circulation pipeline 2 in real time and sends the temperature of the cooling liquid to the thermal management system controller. When the charging gun 1 and/or the energy storage battery are/is cooled, the controller of the thermal management system can adjust the rotating speeds of the compressor 32 and the electronic water pump 7 according to the first thermal load temperature, the second thermal load temperature and the temperature of the cooling liquid, so that the variable frequency control of the thermal management system is realized, and the energy consumption of the system is reduced.

Specifically, when the refrigeration system 3 operates, the cooling fluid flows in the circulation pipe 2, the first heat load temperature and/or the second heat load temperature may be reduced, the cooling capacity requirement of the storage and charging integrated device may be reduced, the temperature of the cooling fluid flowing in the circulation pipe 2 may be gradually reduced in the process, and a cooling fluid temperature threshold may be preset in the thermal management system controller. In the cooling process, when the first heat load temperature and the second heat load temperature are reduced and the temperature of the cooling liquid is lower than the temperature threshold of the cooling liquid, the heating phenomenon of the charging gun 1 and/or the energy storage battery is improved, at this time, the compressor 32 in the refrigeration system 3 does not need to work at a higher rotating speed, the controller of the thermal management system can properly reduce the rotating speed of the compressor 32 and/or the electronic water pump 7 in the refrigeration system 3, and when the compressor 32 works at a lower rotating speed, the cooling requirement of the charging gun 1 and/or the energy storage battery can be met; when the first thermal load temperature and the second thermal load temperature are still higher, and the temperature of the coolant is greater than or equal to the coolant temperature threshold, it indicates that the heating phenomenon of the charging gun 1 and/or the energy storage battery is more serious, and the compressor 32 and/or the electronic water pump 7 need to be maintained at a larger working rotating speed, and at this time, the rotating speed of the compressor 32 and/or the electronic water pump 7 can be increased according to the specific values of the first thermal load temperature, the second thermal load temperature and the temperature of the coolant, so as to ensure the system cooling effect.

In the embodiment of the invention, the controller of the thermal management system can adjust the rotating speeds of the compressor 32 and the electronic water pump 7 according to the first heat load temperature, the second heat load temperature and the temperature of the cooling liquid, so that the variable frequency control of the thermal management system is realized and the energy consumption of the system is reduced while the cooling effect of the charging gun 1 and/or the energy storage battery is ensured.

The setting mode of the first preset temperature range and the second preset temperature range is only an example, and in the actual application process, a person skilled in the art can set the adjusting mode of the rotating speed of the compressor and the rotating speed of the electronic water pump according to the actual situation.

In the present embodiment, two water temperature sensors 24 are preferably arranged, namely a first water temperature sensor 241 and a second water temperature sensor 242, as shown in fig. 1, along the direction in which the cooling liquid flows in the circulation pipeline 2, and the first water temperature sensor 241 and the second water temperature sensor 242 are respectively arranged on two sides of the refrigeration system 3. The first water temperature sensor 241 can detect the temperature of the cooling liquid before cooling, the second water temperature sensor 242 can detect the temperature of the cooling liquid after cooling, the heat management system controller can obtain the refrigerating capacity provided by the refrigerating system 3 according to the numerical values of the first water temperature sensor 241 and the second water temperature sensor 242, the rotating speed of the compressor 32 and the electronic water pump 7 can be controlled according to the refrigerating capacity provided by the refrigerating system 3, the first heat load temperature and the second heat load temperature, and the accuracy of frequency conversion control of the system is improved.

Optionally, still referring to fig. 1, in a possible embodiment, a pressure sensor 39 may also be provided in the refrigerant pipe 36 for detecting the pressure in the refrigerant pipe 36; the pressure sensor 39 is electrically connected to a thermal management system controller that regulates the speed of the compressor 32 and the condensing fan 34 based on the pressure in the refrigerant line 36.

In this embodiment, two pressure sensors 39, namely a first pressure sensor 391 and a second pressure sensor 392, are preferably disposed, as shown in fig. 1, in the direction in which the refrigerant flows in the refrigerant pipeline 36, the first pressure sensor 391 and the second pressure sensor 392 are respectively disposed on two sides of the compressor 32. After passing through the compressor 32, the refrigerant changes from a low pressure state to a high pressure state, and at this time, the first pressure sensor 391 detects a first pressure, i.e., a low pressure, in the refrigerant pipe 36, and the second pressure sensor 392 detects a second pressure, i.e., a high pressure, in the refrigerant pipe 36. When the first pressure has a low value, for example, below a first pressure threshold, indicating a lack of refrigerant in refrigerant line 36, the thermal management system controller may control the low speed operation or shutdown of compressor 32. When the value of the second pressure is larger, for example, higher than the second pressure threshold, which indicates that the load of the compressor 32 is larger, at this time, the thermal management system controller may appropriately decrease the rotation speed of the compressor 32 and increase the rotation speed of the condensing fan 34, so as to quickly dissipate the heat of the condenser 33 to the external environment, thereby realizing quick cooling; when the value of the second pressure is smaller, for example, lower than the second pressure threshold, it indicates that the load of the compressor 32 is smaller, and at this time, the controller of the thermal management system appropriately reduces the rotation speed of the condensing fan 34, so as to implement the variable frequency control of the thermal management system, and further reduce the energy consumption of the system while ensuring the cooling effect; and the real-time monitoring of the values of the first pressure sensor 391 and the second pressure sensor 392 can also protect the pressure in the refrigerant pipeline 36, so as to prevent the pressure from being too low or too high, which affects the refrigeration system 3.

Of course, the compressor, the electronic water pump and/or the condensing fan frequency conversion control mode are only optional setting schemes, and any technical scheme that the frequency conversion control of the thermal management system is realized by monitoring the temperature of the charging gun, the energy storage battery, the temperature of the cooling liquid in the circulating pipeline and/or the pressure of the refrigerant pipeline is within the technical scheme protection scope of the embodiment of the invention.

Optionally, referring still to fig. 1, in the embodiment of the present invention, the thermal management system may further include a heating system, where the heating system includes a heating pipe 8, a heater 81, and an electronic control valve 9; the heating pipeline 8 is communicated with a public pipeline 21 and a battery cooling pipeline 22, and an electric control valve 9 is arranged at the position where the heating pipeline 8 is communicated with the public pipeline 21; the heater 81 is used to heat the coolant flowing into the heating duct 8.

It can be understood that the storage and charging integrated equipment is generally arranged outdoors, and the lower temperature in winter can cause the activity of the energy storage battery to be reduced, and the discharge performance of the battery to be poorer. In view of this, in this embodiment, a heating duct 8 may be further provided in the thermal management system, the heating duct 8 communicates with the common duct 21 and the battery cooling duct 22, an electronic control valve 9 is provided at a position where the heating duct 8 communicates with the common duct 21, and the electronic control valve 9 and the heater 81 are respectively connected to the thermal management system controller. As shown in fig. 1, the connection position of the heating pipeline 8 and the common pipeline 21 is set between the water tank 6 and the refrigeration system 3, when the second heat load temperature obtained by the controller of the thermal management system is less than the battery heating threshold, which indicates that the temperature at the energy storage battery is too low, the electronic control valve 9 can be controlled to switch on the heating pipeline 8, and at this time, the cooling liquid in the circulating pipeline 2 enters the heating pipeline 8, that is, the heating loop where the heating system is located, and does not enter the cooling loop where the refrigeration system 3 is located. The heating pipeline 8 is provided with a heater 81, the heater 81 can heat the cooling liquid flowing into the heating pipeline 8, and the heated cooling liquid enters the battery water cooling plate 4 through the battery cooling pipeline 22 to heat the energy storage battery.

Through setting up heated tube 8 and heater 81, when the energy storage battery temperature is lower, thermal management system still can realize the heating function of energy storage battery, prevents that the energy storage battery temperature from crossing too low unable normal completion charging function, plays certain guard action to the energy storage battery, has improved the life of storing up, filling the integration equipment.

Optionally, in this embodiment, the electronic control valve 9 may be a two-position three-way electronic control valve 9, and the heater 81 may be a PTC heater. When the energy storage battery needs to be heated, the two-position three-way electric control valve 9 is controlled to be communicated with the heating pipeline 8, so that the heating function of the energy storage battery is realized; when the energy storage battery and/or the charging gun 1 need to be cooled, the two-position three-way electric control valve 9 is controlled to be communicated with the refrigerating system 3, and the system cooling function is realized.

In the heat management system of the storage and charging integrated equipment provided by the embodiment of the invention, a refrigerating system and a heating system can be simultaneously arranged, the switching-on position of the electric control valve is adjusted according to the actual temperature information of each component in the storage and charging integrated equipment, the switching of each heating function of the refrigerating function of the heat management system is realized, the heat management requirements of the storage and charging integrated equipment under different working conditions are further met, and the intelligence of the heat management system is improved.

Fig. 2 is a control logic diagram of a thermal management system of a storage and charging integrated device according to an embodiment of the present invention, and details of a working process of the thermal management system of the storage and charging integrated device according to the embodiment of the present invention are described below with reference to fig. 2. As shown in fig. 2, when the storage and charging integrated device works, the thermal management system controller is firstly awakened, and the thermal management system controller acquires a first thermal load temperature at the charging gun 1 and a second thermal load temperature at an energy storage battery (not shown in the figure) in real time; further, the thermal management system controller judges whether the first heat load temperature is greater than the cooling temperature of the charging gun and/or whether the second heat load temperature is greater than the cooling temperature of the battery, if so, the electronic control valve 9 is controlled to be communicated with a cooling loop where the refrigeration system 3 is located, the refrigeration system 3 and the electronic water pump 7 are started at the same time, and the opening degree of the proportional control valve 5 is adjusted to cool the charging gun 1 and/or the energy storage battery; if not, no operation is carried out, and the first heat load temperature and the second heat load temperature are continuously monitored. Meanwhile, the thermal management system controller judges whether the second thermal load temperature at the energy storage battery is lower than the battery heating temperature, if so, the electric control valve 9 is controlled to be connected with a heating loop where the heating system is located, and the heater 81 and the electronic water pump 7 are started simultaneously to heat the energy storage battery. After the operation is finished, the thermal management system controller judges whether the first thermal load temperature and the second thermal load temperature both meet the normal working temperature range, if so, the thermal management system is closed, and the next working response is waited; if not, repeating the operation until the charging gun 1 and/or the energy storage battery work in the normal working temperature range.

Based on the same inventive concept, an embodiment of the present invention further provides a control method for a storage and charging integrated device thermal management system, which is applicable to the storage and charging integrated device thermal management system provided in any embodiment of the present invention, and fig. 3 is a flowchart of the control method for the storage and charging integrated device thermal management system provided in the embodiment of the present invention, and as shown in fig. 3, the control method includes:

s110, acquiring a first heat load temperature at a charging gun and a second heat load temperature at an energy storage battery in real time;

and S120, adjusting the opening of the proportional control valve according to the first heat load temperature and the second heat load temperature, and adjusting the working states of the electronic water pump and the refrigerating system to adjust the temperature of the charging gun and/or the energy storage battery.

The control method provided in the embodiment of the present invention has all the technical features and corresponding advantageous effects of the thermal management system provided in any embodiment of the present invention, and the specific implementation manner of the above steps may refer to the above embodiments, which are not described herein again.

Through the arrangement mode, the thermal management system can regulate and control the temperatures of the charging gun and the energy storage battery at the same time, the integration level of the thermal management system is greatly improved, and the system is better in arrangement performance and better in economy; meanwhile, the flow in the battery cooling pipeline and the gun line pipeline is adjusted by adjusting the opening of the proportional control valve, the thermal management system can meet the thermal management requirements of the storage and charging integrated equipment under different working conditions according to the actual working states of the charging gun and the energy storage battery, and the intelligence of the thermal management system is improved.

Optionally, in a possible embodiment, adjusting the opening of the proportional regulating valve according to the first heat load temperature and the second heat load temperature, and adjusting the operating states of the electronic water pump and the refrigeration system to adjust the temperature of the charging gun and/or the energy storage battery may include:

when the first heat load temperature is greater than or equal to the cooling threshold value of the charging gun and the second heat load temperature is smaller than the cooling threshold value of the battery, the proportional control valve is closed, and the electronic water pump and the refrigerating system are started simultaneously, so that the cooling liquid in the public pipeline enters the gun line pipeline after being cooled, and the charging gun is cooled.

Specifically, when the first heat load temperature is greater than or equal to the cooling threshold of the charging gun and the second heat load temperature is less than the cooling threshold of the battery, it indicates that the temperature of the charging gun is higher and the temperature of the energy storage battery is within a normal temperature range; at this moment, the proportion adjusting valve can be controlled by the controller of the heat management system to be closed, the electronic water pump, the compressor and the condensing fan are controlled to work simultaneously, cooling liquid in the public pipeline is cooled in a cooling liquid circulation cavity of the heat exchanger, the cooled cooling liquid enters the gun line pipeline through the water inlet end of the gun line pipeline and flows in the gun line pipeline, and the charging gun is cooled.

Optionally, in a possible embodiment, adjusting the opening of the proportional control valve according to the first heat load temperature and the second heat load temperature, and adjusting the operating states of the electronic water pump and the refrigeration system to adjust the temperature of the charging gun and/or the energy storage battery may further include:

when the first heat load temperature is smaller than the cooling threshold value of the charging gun and the second heat load temperature is larger than or equal to the cooling threshold value of the battery, the proportional control valve is opened to the maximum opening, and the electronic water pump and the refrigerating system are started simultaneously, so that the cooling liquid in the public pipeline enters the battery water cooling plate through the battery cooling pipeline after being cooled, and the energy storage battery is cooled.

When the first heat load temperature is lower than the cooling threshold of the charging gun and the second heat load temperature is greater than or equal to the cooling threshold of the battery, the temperature of the energy storage battery is higher, and the temperature of the charging gun is in a normal temperature range; the steerable proportional control valve of thermal management system controller opens to the maximum aperture this moment, and control electronic water pump, compressor and condensing fan work simultaneously, and the coolant liquid in the public pipeline is cooled off in the coolant liquid circulation intracavity of heat exchanger, and the coolant liquid after the cooling is gone into the battery water-cooling board by battery water-cooling board water inlet, flows in the battery water-cooling board, cools down to energy storage battery.

when the first heat load temperature is larger than or equal to the cooling threshold of the charging gun and the second heat load temperature is larger than or equal to the cooling threshold of the battery, the proportional control valve is adjusted according to the first heat load temperature and the second heat load temperature to open the first opening, and the electronic water pump and the refrigerating system are started simultaneously, so that cooling liquid in the public pipeline can enter the gun line pipeline and the battery water cooling plate simultaneously after being cooled, and the charging gun and the energy storage battery are cooled.

When the first heat load temperature is greater than or equal to the cooling threshold of the charging gun and the second heat load temperature is greater than or equal to the cooling threshold of the battery, the temperatures of the charging gun and the energy storage battery are higher, at the moment, the heat management system controller can adjust the proportional control valve to open the first opening according to the first heat load temperature and the second heat load temperature, and simultaneously control the electronic water pump, the compressor and the condensing fan to work, so that cooling liquid in the public pipeline can enter the gun line pipeline and the battery water cooling plate after being cooled, and the charging gun and the energy storage battery are cooled.

Optionally, in a possible embodiment, the thermal management system further includes a heating system: the heating system comprises a heating pipeline, a heater and an electric control valve; the control method further comprises the following steps: when the second heat load temperature is lower than the battery heating threshold value, adjusting the opening position of the electric control valve to enable the cooling liquid in the public pipeline to enter the heating pipeline; and controlling to start the electronic water pump and the heater so as to realize the heating function of the energy storage battery.

In this embodiment, a heating pipeline, a heater and an electronic control valve may also be disposed in the thermal management system, and the electronic control valve and the heater are respectively connected to the controller of the thermal management system. When the second heat load temperature acquired by the heat management system controller is smaller than the battery heating threshold, the temperature at the energy storage battery is too low, the electric control valve can be controlled to be connected with the heating pipeline, and the cooling liquid in the circulating pipeline can enter the heating pipeline and does not enter the refrigerating system. The heating pipeline is provided with a heater, the heater can heat the cooling liquid flowing into the heating pipeline, and the heated cooling liquid enters the battery water cooling plate through the battery cooling pipeline to heat the energy storage battery.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that the features of the various embodiments of the invention may be partially or fully coupled or combined with each other and may be coordinated with each other and technically driven in various ways. Numerous variations, rearrangements, combinations, and substitutions will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A heat management system of storage and charging integrated equipment is characterized by comprising a circulating pipeline, an electronic water pump, a refrigerating system, a battery water cooling plate and a proportional control valve; the storage and charging integrated equipment at least comprises an energy storage battery and a charging gun;

2. The integrated storage and charging device thermal management system of claim 1, wherein the refrigeration system comprises: the system comprises a heat exchanger, a compressor, a condenser, a condensing fan, an expansion valve and a refrigerant pipeline;

the heat exchanger comprises a refrigerant circulation cavity and a cooling liquid circulation cavity, the refrigerant pipeline is communicated with the refrigerant circulation cavity, and the common pipeline is communicated with the cooling liquid circulation cavity; the refrigerant circulation cavity, the compressor, the condenser and the expansion valve are sequentially connected in series through the refrigerant pipeline; the condensing fan is used for driving air to circulate so as to realize heat exchange with the condenser.

3. The integrated storage and charging device thermal management system of claim 2, further comprising a thermal management system controller; the thermal management system controller is respectively and electrically connected with the electronic water pump, the refrigeration system, the proportion regulating valve, the energy storage battery and the charging gun;

the thermal management system controller adjusts the opening degree of the proportional control valve according to the first heat load temperature at the charging gun and the second heat load temperature at the energy storage battery, and controls and starts the electronic water pump and the refrigerating system so as to cool the charging gun and/or the energy storage battery.

4. The storage and charging integrated equipment thermal management system according to claim 3, wherein a water temperature sensor is arranged in the circulating pipeline and used for detecting the temperature of cooling liquid in the circulating pipeline;

the water temperature sensor is electrically connected with the thermal management system controller, and the thermal management system controller adjusts the rotating speeds of the compressor and the electronic water pump according to the first thermal load temperature, the second thermal load temperature and the temperature of the cooling liquid.

5. The integrated storage and charging device thermal management system according to claim 3, wherein a pressure sensor is arranged in the refrigerant pipeline and used for detecting the pressure in the refrigerant pipeline;

the pressure sensor is electrically connected with the heat management system controller, and the heat management system controller adjusts the rotating speeds of the compressor and the condensing fan according to the pressure in the refrigerant pipeline.

6. The integrated storage and charging device thermal management system of claim 1, further comprising a heating system: the heating system comprises a heating pipeline, a heater and an electric control valve;

the heating pipeline is communicated with the public pipeline and the battery cooling pipeline, and an electric control valve is arranged at the position where the heating pipeline is communicated with the public pipeline;

the heater is used for heating the cooling liquid flowing into the heating pipeline.

7. A control method of a storage and charging integrated equipment thermal management system is applicable to the storage and charging integrated equipment thermal management system of any one of claims 1 to 6, and comprises the following steps:

8. The control method according to claim 7, wherein the adjusting of the opening degree of a proportional regulating valve according to the first heat load temperature and the second heat load temperature, and the adjusting of the operating states of the electronic water pump and the refrigeration system to adjust the temperature of the charging gun and/or the energy storage battery, comprises:

when the first heat load temperature is greater than or equal to the cooling threshold value of the charging gun, and the second heat load temperature is smaller than the cooling threshold value of the battery, the proportional control valve is closed, and the electronic water pump and the refrigerating system are started simultaneously, so that the cooling liquid in the public pipeline enters the gun line pipeline after being cooled, and the charging gun is cooled.

9. The control method according to claim 7, wherein the adjusting of the opening degree of a proportional regulating valve according to the first heat load temperature and the second heat load temperature, and the adjusting of the operating states of the electronic water pump and the refrigeration system to adjust the temperature of the charging gun and/or the energy storage battery, further comprises:

when first heat load temperature is less than rifle cooling threshold value that charges, just when second heat load temperature is more than or equal to battery cooling threshold value, open ratio control valve to maximum aperture, start simultaneously electronic water pump with refrigerating system, so that coolant liquid in the public pipeline passes through after cooling battery cooling pipe gets into battery water-cooling board, it is right energy storage battery cools down.

10. The control method according to claim 7, wherein the adjusting of the opening degree of a proportional regulating valve according to the first heat load temperature and the second heat load temperature, and the adjusting of the operating states of the electronic water pump and the refrigeration system to adjust the temperature of the charging gun and/or the energy storage battery, further comprises:

when first heat load temperature more than or equal to rifle cooling threshold value charges, just during second heat load temperature more than or equal to battery cooling threshold value, according to first heat load temperature with the size of second heat load temperature is adjusted proportional control valve to first aperture, starts simultaneously electronic water pump with refrigerating system, so that get into simultaneously behind the cooling liquid cooling in the public conduit rifle pipeline with battery water-cooling board, it is right charge rifle with energy storage battery cools down.

11. The control method of claim 7, wherein the thermal management system further comprises a heating system: the heating system comprises a heating pipeline, a heater and an electric control valve;

the control method further comprises the following steps: when the second heat load temperature is lower than the battery heating threshold value, adjusting the opening position of the electric control valve to enable the cooling liquid in the public pipeline to enter the heating pipeline;

and controlling to start the electronic water pump and the heater so as to realize the heating function of the energy storage battery.