Geothermal heat retaining parking space system

Abstract

The application discloses a kind of geothermal heat preservation parking space systems, it is related to parking equipment technical field, including parking space mechanism and heat transfer mechanism, parking space mechanism is used for the parking of vehicle;Heat transfer mechanism is used for the heat transfer of battery heating;Heat transfer mechanism includes buried pipe, ground source side circulating pump, user side circulating pump, ground source heat pump unit and several air bags, buried pipe is buried in underground;Buried pipe is communicated with ground source side circulating pump through ground source side pipeline and forms ground source side closed loop pipeline, and ground source side water delivery device is also communicated on ground source side pipeline;Air bag is communicated with user side circulating pump through user side pipeline and forms user side closed loop pipeline, and user side water delivery device is also communicated on user side pipeline;The application absorbs the heat in the earth's crust by using buried pipe, and is transmitted, and the battery of vehicle is heated, to reach the purpose that lithium battery is heated and high safety.

Description

Technical Field

[0001] This invention relates to the field of parking equipment technology, specifically to a geothermal insulated parking space system. Background Technology

[0002] New energy vehicles are the main direction for the transformation, upgrading, and green development of the global automotive industry.

[0003] As new energy vehicles rapidly penetrate the private consumer market, charging remains a major challenge for the industry. The primary power source for new energy vehicles is lithium-ion batteries, which offer advantages such as low pollution and long lifespan. However, lithium-ion batteries charge slowly at low temperatures, posing safety hazards, and low-temperature storage also reduces battery capacity. Low-temperature charging leads to lithium plating, posing a serious safety risk. When temperatures are too low, lithium ions directly gain electrons on the negative electrode surface, transforming into metallic lithium and accumulating into lithium dendrites, causing capacity loss. As these dendrites continue to grow, they can easily puncture the separator and connect to the positive electrode, causing an internal short circuit and potentially leading to a serious safety accident. Low temperatures also exacerbate positive electrode cracking, reducing battery capacity.

[0004] To date, it has been difficult to solve the problems of low-temperature charging and capacity loss in lithium batteries using innovative materials. Existing battery heating technologies are mainly for internal heating in new energy vehicles, and there are three common methods: battery self-heating, forced draft heating, and heating of equipment within the battery pack. Battery self-heating is slow; forced draft heating requires additional air conditioning equipment and strict design of the air duct, and the heating effect is not ideal; heating within the battery pack is effective and fast, but the heating components are large, occupying space in the vehicle and easily causing localized overheating, posing a safety hazard.

[0005] In view of the above, this application is hereby submitted. Summary of the Invention

[0006] The purpose of this invention is to provide a geothermal insulated parking space system. This system uses buried pipes to absorb and transmit heat from the earth's crust, and to heat the vehicle's battery, thereby solving the problem of difficulty in charging lithium batteries or potential safety hazards in low-temperature environments using existing technologies.

[0007] This invention provides a geothermal insulation parking space system, which is implemented through the following scheme: it includes a parking space mechanism and a heat transfer mechanism. The parking space mechanism is used for parking vehicles; the heat transfer mechanism is used for heat transfer from battery heating. The heat transfer mechanism includes a buried pipe, a ground source-side circulation pump, a user-side circulation pump, a ground source heat pump unit, and several airbags. The buried pipe is installed underground. The buried pipe is connected to the ground source side circulation pump through the ground source side pipeline to form a ground source side closed loop pipeline, and a ground source side water supply device is also connected through the ground source side pipeline; the airbag is connected to the user side circulation pump through the user side pipeline to form a user side closed loop pipeline, and a user side water supply device is also connected through the user side pipeline. The ground source heat pump unit is connected between the ground source side pipeline and the user side pipeline. The ground source heat pump unit is used to transfer heat between the ground source side closed loop pipeline and the user side closed loop pipeline; at least one airbag is installed in the parking space mechanism.

[0008] Preferably, the ground source heat pump unit includes an evaporator, a compressor, a condenser, and heat pump pipes, with the evaporator, condenser, and compressor connected in sequence through heat pump pipes to form a closed-loop heat pump circuit; A ground-source pipe passes through the evaporator, and a user-side pipe passes through the condenser; refrigerant is installed in the heat pump closed-loop circuit.

[0009] Preferably, a throttling valve is installed on the heat pump pipeline.

[0010] Preferably, antifreeze is provided in the user-side pipeline.

[0011] Preferably, the airbag is provided with a water inlet and a water outlet, both of which are connected to the user-side pipeline. A pressure valve is installed on the user-side pipeline on the side of the water outlet. The airbag is coated with heat-insulating material on all sides except the top surface.

[0012] Preferably, the parking space mechanism includes an upper mechanism and a lower mechanism. The upper mechanism is located above the lower mechanism. The upper mechanism includes a prefabricated keel, multiple steel channels, and filler material. The bottom of the steel channel is provided with a through hole, and the filler material is filled in the steel channel. Two adjacent steel channels are connected by the prefabricated keel.

[0013] Preferably, the assembled keel includes a middle keel and side keels. The cross-section of the middle keel is concave. The middle keel includes two inner engaging parts, and a groove is formed between the two inner engaging parts. Each steel channel has an outer locking part on both sides. The outer locking part can be locked with a single inner locking part, and the outer locking part can be locked with the side keel.

[0014] Preferably, the filler material includes permeable concrete and planting soil, and each steel trough is filled with the same filler material.

[0015] Preferably, the lower structure consists of a concrete cushion layer, a crushed stone cushion layer, and a compacted soil layer from top to bottom, with the prefabricated keel installed on the concrete cushion layer.

[0016] Preferably, a single airbag is positioned above the lower mechanism, and the upper mechanism is positioned around the airbag. When the airbag is not filled with liquid, the top height of the airbag is less than or equal to the top height of the upper mechanism. When the vehicle is parked on the superstructure and the airbag is filled with liquid, the top height of the airbag is higher than the top height of the superstructure, but less than or equal to the height of the vehicle's battery.

[0017] Compared with the prior art, the embodiments of the present invention have the following advantages and beneficial effects: 1. The geothermal insulation parking space system provided in this embodiment of the invention, through the cooperation of a parking space mechanism and a heat transfer mechanism, uses buried pipes to absorb heat from the earth's crust into a ground source-side closed-loop pipeline. The water in the ground source-side closed-loop pipeline transfers the heat to the ground source heat pump unit, and then through the ground source heat pump unit to the user-side closed-loop pipeline. The user-side closed-loop pipeline inflates the airbag with water, causing the airbag to expand and transfer heat to the battery of the new energy vehicle, thereby continuously heating the battery, improving charging efficiency, protecting battery capacity, and solving the problems of slow charging and battery capacity loss in new energy vehicles in winter. At the same time, it effectively utilizes the earth's crustal heat source.

[0018] 2. The geothermal insulated parking space system provided in this embodiment of the invention has three loops: a ground source side closed loop pipeline, a user side closed loop pipeline, and a heat pump closed loop path. The three paths are independent of each other and do not interfere with each other, only exchanging heat. This structure is easy to construct and maintain. It uses refrigerant as the heat transfer medium, which has high heat transfer efficiency. The compressor can control the temperature of the airbags to avoid the temperature of the airbags used for heating being too high or too low, so as to avoid damage to the lithium battery or ineffective heating.

[0019] 3. The geothermal insulation parking space system provided in this embodiment of the invention has an upper structure of a prefabricated assembly, which can be assembled on site and reused. It is suitable for different scenarios and new energy vehicles of different sizes, and is highly flexible. The pattern can be spliced ​​and adjusted according to needs, which is easy to construct and maintain. It also has permeable and ecological characteristics, which can meet the technical requirements of sponge city.

[0020] In general, the embodiments of the present invention provide a geothermal insulated parking space system that uses buried pipes to absorb and transmit heat from the earth's crust, and to heat the vehicle's battery, thereby achieving the purpose of heating the lithium battery while ensuring high safety. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1A schematic diagram of a heat transfer mechanism provided in an embodiment of the present invention; Figure 2 A plan view of a parking space mechanism provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the geothermal insulation parking space system when it is closed, provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the geothermal insulation parking space system provided in an embodiment of the present invention when it is opened; Figure 5 This is a schematic diagram of the steel channel structure provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the assembled state structure of the prefabricated keel and steel channel provided in an embodiment of the present invention.

[0023] The attached diagram shows the markings and corresponding component names: 101-Vehicle, 102-Battery, 103-Buried Pipe, 104-Ground Source Side Circulation Pump, 105-User Side Circulation Pump, 106-Ground Source Heat Pump Unit, 161-Evaporator, 162-Compressor, 163-Condenser, 107-Airbag, 108-User Side Pipeline, 109-Ground Source Side Pipeline, 110-Ground Source Side Water Supply Device, 111-User Side Water Supply Device, 112-Heat Pump Pipeline, 113 - Throttling valve, 114- Pressure valve, 115- Steel channel, 116- Filler, 117- Through hole, 118- Intermediate keel, 119- Side keel, 120- Inner locking part, 121- Groove, 122- Outer locking part, 123- Concrete cushion layer, 124- Crushed stone cushion layer, 125- Compacted soil layer, 126- Planting soil, 127- Permeable concrete, 128- Inlet, 129- Outlet. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this invention, it should be noted that the terms "first," "second," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Example

[0028] like Figure 1-4 As shown, this embodiment of the invention provides a geothermal insulated parking space system, including a parking space mechanism and a heat transfer mechanism. The parking space mechanism is used for parking vehicles 101 and may include one or more parking spaces. The heat transfer mechanism is used for heat transfer from a battery 102 to heat the vehicle battery 102. The heat transfer mechanism includes a buried pipe 103, a ground source-side circulation pump 104, a user-side circulation pump 105, a ground source heat pump unit 106, and several airbags 107. The buried pipe 103 is buried underground at a depth of 20 to 100 meters, which can be determined according to the actual conditions of different regions during actual operation and is not limited here. The buried pipe 103 is buried underground to absorb heat from the earth's crust. In this embodiment of the invention, the buried pipe 103 is set as a U-shaped pipe. This structure can increase the contact area between the underground pipe and the geothermal energy, thereby improving the energy collection efficiency.

[0029] The buried pipe 103 is connected to the ground source side circulation pump 104 through the ground source side pipe 109 to form a ground source side closed loop pipeline. A ground source side water supply device 110 is also connected through the ground source side pipe 109. The ground source heat pump unit 106 is connected between the ground source side pipe 109 and the user side pipe 108. The ground source heat pump unit 106 is used to transfer heat between the ground source side closed loop pipeline and the user side closed loop pipeline. At least one airbag 107 is installed in the parking space mechanism. The airbag 107 is connected to the user-side circulation pump 105 through the user-side pipeline 108 to form a user-side closed-loop pipeline. The user-side pipeline 108 is also connected to the user-side water supply device 111. The ground source side water supply device 110 and the user-side water supply device 111 are the heat transfer fluid medium supply sources for the two closed loops, and also the replenishment sources. Under the action of the ground source side circulation pump 104 and the user-side circulation pump 105, they circulate in the ground source side closed-loop pipeline and the user-side closed-loop pipeline respectively to achieve heat transfer. The ground source heat pump unit 106 is located between the ground source side pipe 109 and the user side pipe 108. It is used to transfer the crustal heat in the ground source side closed loop pipe to the user side closed loop pipe. The airbag 107 is connected to the user side circulation pump 105 through the user side pipe 108. It is used to transfer heat and maintain a suitable temperature in the parking space. Each airbag 107 is independent and can be used by multiple parking spaces. Of course, multiple airbags 107 can be set in one parking space. There is no limitation here. In this embodiment of the invention, for ease of understanding, one airbag 107 is set in one parking space.

[0030] In actual operation, both the ground source side pipe 109 and the user side pipe 108 can be buried under the soil layer to protect the pipes and reduce space occupation. Antifreeze can be added to the user side pipe 108 to prevent it from freezing. After the geothermal insulated parking space system of this embodiment is assembled, water is first supplied to the ground source side closed loop pipe and the user side closed loop pipe through the ground source side water supply device 110 and the user side water supply device 111, respectively. The ground source side circulation pump 104 and the user side circulation pump 105 are turned on to realize the water circulation of the two closed loop pipes. At this time, the water in the ground source side closed loop pipe will absorb heat from the earth's crust as it passes through the buried pipe 103, causing the water temperature in the ground source side closed loop pipe to rise. When circulating through the ground source heat pump unit 106, it transfers heat to the ground source heat pump unit 106. At this time, the water in the user side closed loop pipe is also circulating. When passing through the ground source heat pump unit 106, it will absorb heat from the ground source heat pump unit 106, causing the water temperature to rise.

[0031] It should be noted that the user-side closed-loop pipeline is connected to the airbag 107. Water fills the airbag 107 and circulates within it. The heat absorbed by the water in the ground source heat pump unit 106 causes the temperature of the airbag 107 to rise. At this time, the airbag 107 transfers heat to the battery 102 of the new energy vehicle 101 to heat the battery 102. Simultaneously, because the water in the ground source-side closed-loop pipeline and the user-side closed-loop pipeline can circulate, heat can be continuously exchanged to continuously heat the battery 102. When the new energy vehicle 101 needs to leave, the system of this embodiment stops working. The water in the airbag 107, under the influence of pressure and gravity, flows back to the user-side water supply device 111. The airbag 107 shrinks in volume, moves away from the battery 102, and stops heating.

[0032] To improve the heat transfer efficiency of the ground source heat pump unit 106, in this embodiment, the ground source heat pump unit 106 includes an evaporator 161, a compressor 162, a condenser 163, and a heat pump pipe 112. The evaporator 161, condenser 163, and compressor 162 are sequentially connected through the heat pump pipe 112 to form a closed-loop heat pump path. A ground source side pipe 109 passes through the evaporator 161, and a user side pipe 108 passes through the condenser 163. Refrigerant is provided in the closed-loop heat pump path. Specifically, the evaporator 161 is located on the ground source side, transferring low-temperature heat from the ground source side to the heat pump system. The compressor 162 compresses and raises the temperature of the low-temperature heat absorbed from the evaporator 161 for further transfer to the user side. The condenser 163, located on the user side, receives the high-temperature, high-pressure refrigerant from the compressor 162 and releases heat to heat the new energy battery 102. The heat pump pipe 112 is a piping system connecting the evaporator 161, compressor 162, and condenser 163, used to transfer the refrigerant and form a closed-loop heat pump path. In this closed-loop path, the refrigerant circulates, completing the cycle of heat absorption, compression, and release. The refrigerant is the heat transfer medium, used to circulate and transfer heat in the heat pump system. It absorbs heat in the evaporator 161, is then compressed in the compressor 162, and finally releases heat in the condenser 163. In other words, the ground source heat pump unit 106 works by compressing and releasing the refrigerant to raise the low-temperature heat from underground geothermal energy to a sufficiently high temperature, typically around 30 degrees Celsius, with adjustable temperature, to heat the airbag 107 or other equipment in the parking space. The user-side pipe 108 passes through the condenser 163 to obtain the heating effect provided by the heat pump unit. This system helps maintain a suitable temperature in the parking space, especially in cold weather.

[0033] In a preferred embodiment of the present invention, a throttling valve 113 is provided on the heat pump pipe 112 to regulate and control the flow rate of the refrigerant, thereby optimizing the performance of the ground source heat pump system. Specifically, by adjusting the flow rate and pressure of the refrigerant, the throttling valve 113 can help optimize the thermal efficiency of the heat pump system. By controlling the flow rate of the refrigerant, it can ensure that appropriate heat is absorbed in the evaporator 161 and appropriate heat is released in the condenser 163 to provide the required heating effect and avoid excessively high or low heating temperatures.

[0034] Furthermore, the airbag 107 is provided with an inlet and an outlet, both of which are connected to the user-side pipe 108. A pressure valve 114 is provided on the user-side pipe 108 on the outlet side. The inlet is where hot water or hot coolant is introduced into the airbag 107, while the outlet is where liquid is discharged from the airbag 107. It is connected to the user-side pipe 108, allowing water to enter and leave the airbag 107 to form a circulation. The function of the pressure valve 114 is to monitor and maintain the pressure in the pipe. Specifically, when the water pressure in the airbag 107 exceeds the threshold of the pressure valve 114, water will flow through the pressure valve 114, causing the water path on the user side to circulate. When the water pressure is too low, water will not flow through the pressure valve 114, thus achieving stable water filling of the airbag 107.

[0035] To improve the ease of construction and maintenance of the embodiments of the present invention, the parking space mechanism is designed, specifically, as follows: Figure 5 and Figure 6 As shown, the parking space mechanism includes an upper mechanism and a lower mechanism. The upper mechanism is located above the lower mechanism. The upper mechanism includes an assembled keel, multiple steel channels 115, and filler 116. The bottom of the steel channel 115 is provided with a through hole 117, which facilitates the drainage of liquid in the steel channel 115. The filler 116 fills the steel channel 115. Adjacent steel channels 115 are connected by an assembled keel. The lower structure can be configured as follows, from top to bottom: a concrete pad 123, a crushed stone pad 124, and a compacted soil layer 125. The prefabricated keel is installed on the concrete pad 123, which is located at the top of the lower structure and serves as the foundation of the upper structure. The crushed stone pad 124 serves to drain water and distribute the load. The compacted soil layer 125 refers to the natural soil or other geological materials under the ground. The prefabricated keel is installed on the concrete pad 123 and serves as the skeleton supporting the upper structure, enabling the parking space surface to withstand the load of the vehicle 101. The prefabricated keel can be engaged and connected with the steel channel 115 and the filler 116 of the upper structure to ensure the stability of the entire system.

[0036] Specifically, the steel channels 115 are horizontally arranged and installed on the prefabricated keel. Through holes 117 are provided at the bottom to provide support and distribute the weight of the vehicle 101. The filler 116, located within the steel channels 115, is a solid or shock-absorbing material used to provide stable support for the vehicle 101 and to help distribute and reduce the load on the vehicle 101. Preferably, the filler 116 in this embodiment includes permeable concrete 127 and planting soil 126. Each steel channel 115 is filled with the same filler 116. The permeable concrete 127 has high permeability, allowing water to pass through the concrete without causing water accumulation or drainage problems. In the parking space system, the permeable concrete 127 is used to fill the steel channels 115, which helps with drainage and prevents water accumulation, thus improving the utilization efficiency of the parking spaces and reducing problems caused by water accumulation. The planting soil 126 is soil suitable for plant growth. In the parking space system, the planting soil 126 can be used to create green areas and support vegetation growth. These vegetation plants can improve the environment, provide aesthetic appeal, reduce the urban heat island effect, and improve air quality. Adjacent steel channels 115 are connected by prefabricated keel interlocking to ensure the structural stability of the upper structure and prevent loosening or detachment.

[0037] Furthermore, the prefabricated keel includes a middle keel 118 and side keels 119. The cross-section of the middle keel 118 is concave. The middle keel 118 includes two inner engaging parts 120, forming a groove 121 between the two inner engaging parts 120. Each steel channel 115 has an outer engaging part 122 on both sides. The outer engaging part 122 can engage with a single inner engaging part 120, and the outer engaging part 122 can engage with the side keel 119. Specifically, the middle keel 118 includes two inner engaging parts 120, forming a groove 121 between them. The two inner engaging parts 120 on the middle keel 118 are key for connecting and engaging the steel channels 115 to ensure a stable connection of the entire support structure. That is, each steel channel 115 is located at the bottom of the upper mechanism to support the vehicle 101. Each steel channel 115 has an outer engaging portion 122 on both sides, which engages with the inner engaging portion 120 of the intermediate keel 118. This engaging method helps ensure a reliable connection between the upper mechanism and the intermediate keel 118. The side keel 119 is located at the edge of the parking space, providing additional support and stability. The outer engaging portion 122 can also engage with the side keel 119 to ensure a firm connection of the entire structure.

[0038] Furthermore, a single airbag 107 is positioned above the lower mechanism, while the upper mechanism surrounds the airbag 107. When the airbag 107 is not filled with liquid, the top height of the airbag 107 is less than or equal to the top height of the upper mechanism. When the vehicle 101 is parked on the upper mechanism and the airbag 107 is filled with liquid, the top height of the airbag 107 is higher than the top height of the upper mechanism, but less than or equal to the height of the battery 102 of the vehicle 101. Specifically, the airbag 107 is installed on top of the lower mechanism, generally located in the center of the parking space. It is made of a pressure-resistant, wear-resistant, waterproof, and flexible material with good corrosion resistance and cold resistance. The airbag can be folded; when filled with water, its volume expands to fit snugly against the vehicle chassis, and when drained, its volume shrinks and its height decreases. The upper structure is located around the airbag 107 and acts as the surface of the parking space to support the parked vehicle 101. The upper structure consists of assembled keel and filler 116, etc., to provide a stable support surface. Heating and stopping heating are achieved by adjusting the height of the airbag 107.

[0039] After the vehicle 101 is properly parked in winter, the system of this embodiment of the invention starts to work. Water in the ground source side pipe 109 flows through the U-shaped buried pipe 103 under the drive of the circulation pump, absorbs heat from the earth's crust and soil, and then flows into the evaporator 161. In the evaporator 161, the water transfers heat to the refrigerant in the heat pump pipe 112, and then flows out to form a cycle. The refrigerant in the heat pump pipe 112 absorbs heat and turns into gas after absorbing heat in the evaporator 161, and flows into the compressor 162. The compressor 162 increases the pressure and converts it from gas into high temperature and high pressure liquid, and drives it to flow into the condenser 163. In the condenser 163, the refrigerant transfers heat to the water in the user side pipe 108, and then flows back into the evaporator 161 through the throttle valve 113 to form a cycle. After absorbing heat, the water in the user-side pipe 108 rises to approximately 30 degrees Celsius. Under the action of the side circulation pump, the hot water enters the airbag 107, causing it to continuously expand. Once fully expanded, the airbag 107 adheres to the chassis of the vehicle 101, transferring its heat to the chassis. Since the vehicle battery 102 is mostly located in the chassis of the vehicle 101, its temperature continuously rises until it reaches a suitable charging temperature and remains constant. When the water pressure in the airbag 107 exceeds the threshold of the pressure valve 114, water flows through the pressure valve 114, creating a circulation in the user-side water path. When the vehicle 101 needs to leave, the device stops working. The water in the airbag 107, influenced by pressure and gravity, flows back through the inlet pipe to the user-side water supply device 111. The airbag 107 shrinks in volume, moves away from the chassis of the vehicle 101, and heating ceases.

[0040] This invention exemplifies green and energy-saving technologies. Ground source heat pump systems have a high energy efficiency ratio, typically between 3 and 5. Simply put, for every 1 kWh of electricity consumed, the heat generated is equivalent to the heat directly converted from 3 to 5 kWh of electricity, which is significant from an energy-saving perspective.

[0041] This invention saves charging time. The heat conduction formula is Q=k*A*(T1-T2) / t, where Q represents the heat flow (heat flux) through a unit area per unit time, k represents the thermal conductivity, A represents the heat transfer area, T1 and T2 represent the temperatures of the heat source and cold source, respectively, and t represents the thickness. As the formula shows, when the thermal conductivity, heat transfer area, and thickness are constant, the greater the temperature difference, the greater the heat flux, and the faster the heat transfer speed. For example, in an environment of -20℃, without this device, although the lithium battery generates heat during charging, it continuously loses heat due to the low ambient air temperature, and thus cannot reach a suitable charging temperature, affecting the charging speed. With this device, the water-filled airbag continuously transfers heat to the lithium battery, allowing it to quickly reach a suitable charging temperature. Furthermore, the temperature of the water-filled airbag is adjustable, ultimately stabilizing the battery temperature at the appropriate charging temperature. The table below compares the charging time using this invention with that without it at -20℃ and -5℃.

[0042]

[0043] (Note: Both battery samples #1 and #2 are lithium iron phosphate batteries with a rated voltage of 318 V and a rated capacity of 82 Ah (25 ℃, 1C).) This invention improves the capacity retention rate of lithium batteries. Taking the most widely used lithium iron phosphate battery as an example, under natural conditions, its capacity retention rate is about 60%~70% at 0℃, 40%~50% at -10℃, and 20%~40% at -20℃. After using this device, its capacity retention rate during charging is close to 100%.

[0044] In summary, the geothermal insulated parking space system provided by this invention can utilize geothermal energy to heat and insulate the batteries 102 of new energy vehicles in outdoor parking spaces under low-temperature conditions, such as winter or in cold regions. This improves charging efficiency and protects the capacity of the batteries 102, thereby solving the problems of slow charging and capacity loss of new energy vehicles in winter. Furthermore, the surface layer of this parking space is a prefabricated module, which can be spliced ​​and adjusted according to needs, facilitating construction and maintenance. It also possesses permeable and ecological characteristics, meeting the requirements of sponge city technology. This system offers excellent heating performance, rapid heating, and a high safety factor.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention. It should be noted that the structures or components illustrated in the accompanying drawings are not necessarily drawn to scale, and descriptions of well-known components, processing techniques, and processes have been omitted to avoid unnecessarily limiting the invention.

Claims

1. A geothermal insulated parking space system, comprising a parking space mechanism and a heat transfer mechanism, characterized in that, The parking space mechanism is used for parking the vehicle (101); the heat transfer mechanism is used for heat transfer of the battery (102). The heat transfer mechanism includes a buried pipe (103), a ground source side circulation pump (104), a user side circulation pump (105), a ground source heat pump unit (106), and several airbags (107), wherein the buried pipe (103) is buried underground; The buried pipe (103) is connected to the ground source side circulation pump (104) through the ground source side pipe (109) to form a ground source side closed loop pipeline. The ground source side water supply device (110) is also connected to the ground source side pipe (109). The airbag (107) is connected to the user side circulation pump (105) through the user side pipe (108) to form a user side closed loop pipeline. The user side pipe (108) is also connected to the user side water supply device (111). The ground source heat pump unit (106) is connected between the ground source side pipe (109) and the user side pipe (108). The ground source heat pump unit (106) is used to transfer heat between the ground source side closed loop pipe and the user side closed loop pipe. At least one airbag (107) is provided in the parking space mechanism. Hot water enters the airbag (107), causing it to expand continuously. After the airbag (107) is fully expanded, it fits against the chassis of the vehicle (101), allowing its heat to be transferred to the chassis of the car.

2. The geothermal insulation parking space system according to claim 1, characterized in that, The ground source heat pump unit (106) includes an evaporator (161), a compressor (162), a condenser (163), and a heat pump pipe (112). The evaporator (161), the condenser (163), and the compressor (162) are connected in sequence through the heat pump pipe (112) to form a heat pump closed-loop path. The evaporator (161) has a ground source side pipe (109) passing through it, and the condenser (163) has a user side pipe (108) passing through it. The heat pump closed-loop circuit contains refrigerant.

3. In the geothermal insulation parking space system according to claim 2, a throttling valve (113) is provided on the heat pump pipe (112).

4. A geothermal insulation parking space system according to claim 2, characterized in that, Antifreeze is installed in the user-side pipe (108).

5. A geothermal insulation parking space system according to claim 2, characterized in that, The airbag (107) is provided with an inlet and an outlet, both of which are connected to the user-side pipe (108). A pressure valve (114) is provided on the user-side pipe (108) on the side of the outlet.

6. A geothermal insulation parking space system according to claim 1, characterized in that, The parking space mechanism includes an upper mechanism and a lower mechanism. The upper mechanism is located above the lower mechanism. The upper mechanism includes an assembled keel, multiple steel channels (115) and filler (116). The bottom of the steel channel (115) is provided with a through hole (117), and the filler (116) is filled in the steel channel (115). The two adjacent steel channels (115) are connected by the assembled keel.

7. A geothermal insulation parking space system according to claim 6, characterized in that, The assembled keel includes a middle keel (118) and a side keel (119). The cross-section of the middle keel (118) is concave. The middle keel (118) includes two inner engaging parts (120), and a groove (121) is formed between the two inner engaging parts (120). Each of the steel channels (115) is provided with an outer locking part (122) on both sides. The outer locking part (122) can be locked with a single inner locking part (120), and the outer locking part (122) can be locked with the side keel (119).

8. A geothermal insulation parking space system according to claim 6, characterized in that, The filler (116) includes permeable concrete and planting soil, and each of the steel troughs (115) is filled with the same filler (116).

9. A geothermal insulation parking space system according to claim 6, characterized in that, The lower structure consists of a concrete cushion layer (123), a crushed stone cushion layer (124), and a compacted soil layer (125) from top to bottom. The prefabricated keel is installed on the concrete cushion layer (123).

10. A geothermal insulation parking space system according to claim 6, characterized in that, A single airbag (107) is disposed above the lower mechanism, and the upper mechanism is disposed around the airbag (107). When the airbag (107) is not filled with liquid, the top height of the airbag (107) is less than or equal to the top height of the upper mechanism. When the vehicle (101) is parked on the superstructure and the airbag (107) is filled with liquid, the top height of the airbag (107) is higher than the top height of the superstructure and less than or equal to the height of the battery (102) of the vehicle (101).

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