Vehicle-mounted heat storage heating device

Abstract

The application provides a vehicle-mounted heat storage heating device. The vehicle-mounted heat storage heating device comprises a shell and at least one heat storage assembly arranged in the shell. The heat storage assembly comprises an electric heating element, a heat conducting assembly and a phase change heat storage medium. The heat conducting assembly is sleeved outside the electric heating element, and the phase change heat storage medium is filled between the heat conducting assembly and the electric heating element. An air inlet and an air outlet are arranged on the shell. The air inlet, the air outlet and the gap between the shell and the outer wall of the heat storage assembly jointly form an air duct for air circulation. The phase change heat storage medium is used for absorbing the heat generated by the electric heating element, transmitting the heat to the heat conducting assembly and emitting the heat to the outside of the shell through the air duct. The vehicle-mounted heat storage heating device has high heating efficiency and can improve the endurance of an electric vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric heating, and particularly relates to a vehicle-mounted heat storage heating device. BACKGROUND

[0002] With the emphasis on the environmental protection concept of energy saving and emission reduction, the environmental protection and low-carbon concept of the automobile industry also attracts much attention. Under the promotion of the national development of new energy automobile strategy, the sales of new energy automobiles are increasing, and the sales market of electric automobiles is more extensive.

[0003] The electric automobile relies on the battery for driving. At present, the battery endurance of the pure electric automobile cannot completely meet the demand of the user, especially in the case of starting the air conditioner or heating device in the automobile, which will significantly reduce the endurance of the pure electric automobile, and the endurance will be reduced by one third or even more. Since the pure electric automobile does not have the waste heat generated by the engine of the fuel automobile, at present, most automobile manufacturers adopt a special heating device to realize the heating function, and most of them adopt the PTC (Positive Temperature Coefficient, positive temperature coefficient) thermistor. The PTC thermistor converts the electric energy into the heat energy to improve the temperature in the automobile.

[0004] However, the resistance of the PTC thermistor consumes a large amount of energy, and the pure electric automobile endurance will be reduced by about 50% only by the PTC thermistor to realize the heating function, which hinders the popularization and application of the pure electric automobile. SUMMARY

[0005] The present application provides a vehicle-mounted heat storage heating device, which has high heating efficiency and can improve the endurance of the electric automobile.

[0006] The present application provides a vehicle-mounted heat storage heating device, which comprises a shell and at least one heat storage assembly arranged in the shell, and the shell and the outer wall of the heat storage assembly have a gap; the heat storage assembly comprises an electric heating element, a heat conducting assembly and a phase change heat storage medium; the heat conducting assembly is sleeved on the outer side of the electric heating element, and the phase change heat storage medium is filled between the heat conducting assembly and the electric heating element; the shell is provided with an air inlet and an air outlet, and the air inlet, the air outlet and the gap between the shell and the outer wall of the heat storage assembly jointly form an air duct for air circulation; the phase change heat storage medium is used for absorbing the heat generated by the electric heating element and transferring the heat to the heat conducting assembly; and the heat conducting assembly is used for dissipating the heat from the phase change heat storage medium to the outside of the shell through the air duct.

[0007] Optionally, the heat conducting assembly comprises at least one heat conducting pipe, one end of the heat conducting pipe is closed, the other end is open, and the electric heating element extends into the heat conducting pipe from the opening; wherein the opening is provided with a sealing assembly, and the sealing assembly closes the opening to form a closed cavity of the heat storage assembly.

[0008] Optionally, the heat-conducting pipe is a corrugated pipe formed by continuously bending the outer wall, and the longitudinal section of the corrugated pipe is wave-shaped.

[0009] Optionally, the heat-conducting assembly comprises a first heat-conducting pipe, a second heat-conducting pipe and a third heat-conducting pipe which are sequentially sleeved from inside to outside, the electric heating element is located in the first heat-conducting pipe, and the gaps between the electric heating element and the first heat-conducting pipe, between the first heat-conducting pipe and the second heat-conducting pipe, and between the second heat-conducting pipe and the third heat-conducting pipe are all filled with the phase-change heat storage medium.

[0010] Optionally, the number of the heat storage assemblies is three, and the three heat storage assemblies are arranged in parallel and at intervals.

[0011] Optionally, the air inlet and the air outlet are respectively arranged on opposite sides of the outer wall of the shell.

[0012] Optionally, the outer wall of the shell is provided with a fan assembly, the fan assembly corresponds to the air inlet, and the fan assembly is used for sending air to the inside of the shell through the air inlet.

[0013] Optionally, the fan assembly comprises a fixed plate, a fan cover and at least one fan, the fixed plate is connected to the shell, the fan cover is arranged on the fixed plate, the fan is arranged in the fan cover, and the air outlet of the fan corresponds to the air inlet; wherein the fan cover is provided with an air inlet hole.

[0014] Optionally, the shell comprises a base, and the inner wall of the base is provided with a fixing member, the fixing member is clamped on the outer wall of the heat storage assembly.

[0015] Optionally, the fixing member comprises a first fixing member and a second fixing member, one end of the first fixing member is connected to the base, the other end abuts against the side wall of one side of the heat storage assembly, the second fixing member abuts against the side wall of the other side of the heat storage assembly, and the first fixing member and the second fixing member are connected.

[0016] Optionally, the opening of the first heat-conducting pipe, the opening of the second heat-conducting pipe and the opening of the third heat-conducting pipe are respectively provided with a first connecting member, a second connecting member and a third connecting member, the inner wall of the third connecting member and the inner wall of the second connecting member are both provided with a stepped surface, the outer wall of the first connecting member abuts against the stepped surface of the second connecting member, and the outer wall of the second connecting member abuts against the stepped surface of the third connecting member.

[0017] Optionally, the end faces of the first connecting member, the second connecting member and the third connecting member are flush, and the sealing assembly comprises a first sealing member and a second sealing member which are sequentially arranged on the end faces.

[0018] Optionally, the second sealing member is provided with a communication hole, the end portion of the electric heating element is located in the communication hole, and the electric terminal connected to the end portion of the electric heating element is located outside the second sealing member.

[0019] Optionally, the outer wall of the shell is provided with a heat insulation layer.

[0020] Optionally, the phase change heat storage medium is a graphene composite phase change heat storage medium.

[0021] The vehicle-mounted heat storage and heating device provided by the application mainly comprises a shell and a heat storage assembly arranged in the shell, the heat storage assembly is used for storing heat and emitting the heat to the outside of the shell when needed, specifically, the heat storage assembly mainly comprises an electric heating element, a heat conducting assembly and a phase change heat storage medium, the electric heating element is used for converting electric energy into heat energy, the phase change heat storage medium is filled between the electric heating element and the heat conducting assembly, and the heat of the electric heating element is transmitted to the phase change heat storage medium through heat conduction, the phase change heat storage medium can store the heat and transmit the heat to the heat conducting assembly when needed. There is a gap between the outer wall of the heat storage assembly and the shell, the heat conducting assembly can emit heat to the gap through heat convection, air inlet and air outlet are arranged on the shell, the air inlet, the air outlet and the gap form an air duct for air circulation, cold air from the outside enters the shell through the air inlet, and heat convection is carried out between the cold air and the heat conducting assembly in the air duct, and the hot air is emitted to the environment around the vehicle-mounted heat storage and heating device through the air outlet. The vehicle-mounted heat storage and heating device provided by the application can improve the thermodynamic comprehensive performance of the vehicle-mounted heat storage and heating device by using the phase change heat storage medium to transmit and store heat, and can improve the endurance of the electric vehicle by applying the vehicle-mounted heat storage and heating device to the electric vehicle, without consuming the energy of the vehicle-mounted battery of the electric vehicle, but by heating and storing heat of the electric vehicle by using the ground charging base station, and releasing the heat during the driving of the vehicle for heating the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application. Those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0023] Figure 1 The top view of the vehicle-mounted heat storage and heating device provided by the embodiment of the application;

[0024] Figure 2 The front view of the vehicle-mounted heat storage and heating device provided by the embodiment of the application;

[0025] Figure 3 The rear view of the vehicle-mounted heat storage and heating device provided by the embodiment of the application;

[0026] Figure 4 The left view of the vehicle-mounted heat storage and heating device provided by the embodiment of the application;

[0027] Figure 5This is a right view of the vehicle-mounted thermal storage and heating device provided in an embodiment of the present invention;

[0028] Figure 6 Provided for embodiments of the present invention Figure 1 AA section view;

[0029] Figure 7 A cross-sectional view of a thermal storage component provided in an embodiment of the present invention;

[0030] Figure 8 A cross-sectional view of the first heat pipe provided in an embodiment of the present invention;

[0031] Figure 9 This is a cross-sectional view of the second heat pipe provided in an embodiment of the present invention;

[0032] Figure 10 A cross-sectional view of the third heat pipe provided in an embodiment of the present invention;

[0033] Figure 11 A cross-sectional view of the electric heating element provided in an embodiment of the present invention;

[0034] Figure 12 This is a front view of the base provided in an embodiment of the present invention;

[0035] Figure 13 Provided for embodiments of the present invention Figure 12 BB section view;

[0036] Figure 14 Provided for embodiments of the present invention Figure 12 CC section view;

[0037] Figure 15 This is a schematic diagram illustrating the installation of the first fixing member and the base according to an embodiment of the present invention;

[0038] Figure 16 This is a schematic diagram of the structure of the second fastener provided in an embodiment of the present invention;

[0039] Figure 17 This is a schematic diagram of the installation of the heat storage component and the base provided in an embodiment of the present invention;

[0040] Figure 18 Provided for embodiments of the present invention Figure 17 Top view;

[0041] Figure 19 Provided for embodiments of the present invention Figure 17 The right view;

[0042] Figure 20 A front view of the first seal provided in an embodiment of the present invention;

[0043] Figure 21The application provides a heat exchanger Figure 20 of a D-D cross-sectional view.

[0044] Explanation of reference numerals:

[0045] 1 - shell; 11 - air inlet; 12 - air outlet; 13 - base; 131 - anchor bolt; 14 - fixing member; 141 - first fixing member; 142 - second fixing member; 15 - heat insulation layer; 16 - side plate; 161 - reinforcing rib; 2 - heat storage assembly; 21 - electric heating element; 211 - power terminal; 22 - heat conduction assembly; 221 - first heat conduction pipe; 2211 - first connecting member; 222 - second heat conduction pipe; 2221 - second connecting member; 223 - third heat conduction pipe; 2231 - third connecting member; 2232 - groove; 2233 - first sealing ring; 23 - sealing assembly; 231 - first sealing member; 232 - second sealing member; 3 - fan assembly; 31 - fixed plate; 32 - fan cover; 321 - air inlet hole; 33 - fan; 41 - fastening bolt; 42 - fastening nut; 43 - locking nut; 44 - conical head locking bolt; 45 - second sealing ring; 46 - third sealing ring. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0047] Due to the convenience of manufacturing and installation, most electric vehicles use PTC thermistors to realize the heating function. However, according to formula (1), the electric vehicle uses PTC thermistors to heat, and the consumed electric power is too large.

[0048] Q = c p × m × Δ t (1)

[0049] In formula (1), Q is the heating power of the PTC thermistor W, c p is the specific heat of air at constant pressure 1.009 kj / kg, m is the mass flow of air 360 kg / h, and Δ t is the temperature difference between the air outlet and the air inlet of the heater ℃ (according to the requirements of GB11555-2009, Δ t should be 58 ℃).

[0050] According to formula (1), the heating power required for a PTC thermistor is 5.85 kW. Considering the thermal efficiency coefficient needs to be a safety factor of 1.1, the total heating power required for a PTC thermistor is 6.4 kW. This is obviously a huge energy consumption for the on-board battery of an electric vehicle. This electric heating technology, whether using lithium-ion batteries or hydrogen fuel cells as the power source, requires a power supply exceeding 6.4 kW. This will significantly increase the manufacturing cost of pure electric vehicles and greatly reduce their range, which will restrict the development of electric vehicles.

[0051] Therefore, this embodiment provides an on-board thermal storage heating device that can be applied to electric vehicles. This on-board thermal storage heating device can reduce the matching power required by the on-board battery (lithium-ion battery or hydrogen fuel cell), thereby reducing the manufacturing cost of electric vehicles and improving their range.

[0052] Figure 1 This is a top view of the vehicle-mounted thermal storage and heating device provided in an embodiment of the present invention; Figure 2 This is a front view of the vehicle-mounted thermal storage and heating device provided in an embodiment of the present invention; Figure 3 This is a rear view of the vehicle-mounted thermal storage and heating device provided in an embodiment of the present invention; Figure 4 This is a left view of the vehicle-mounted thermal storage and heating device provided in an embodiment of the present invention; Figure 5 This is a right view of the vehicle-mounted thermal storage and heating device provided in an embodiment of the present invention; Figure 6 Provided for embodiments of the present invention Figure 1 AA section view; Figure 7 This is a cross-sectional view of a thermal storage component provided in an embodiment of the present invention.

[0053] Figure 8 A cross-sectional view of the first heat pipe provided in an embodiment of the present invention; Figure 9 This is a cross-sectional view of the second heat pipe provided in an embodiment of the present invention; Figure 10 A cross-sectional view of the third heat pipe provided in an embodiment of the present invention; Figure 11 This is a cross-sectional view of an electric heating element provided in an embodiment of the present invention.

[0054] Figure 12 This is a front view of the base provided in an embodiment of the present invention; Figure 13 Provided for embodiments of the present invention Figure 12 BB section view; Figure 14 Provided for embodiments of the present invention Figure 12 CC section view;

[0055] Figure 15 This is a schematic diagram illustrating the installation of the first fixing member and the base according to an embodiment of the present invention; Figure 16This is a schematic diagram of the structure of the second fastener provided in an embodiment of the present invention; Figure 17 This is a schematic diagram of the installation of the heat storage component and the base provided in an embodiment of the present invention; Figure 18 Provided for embodiments of the present invention Figure 17 Top view; Figure 19 Provided for embodiments of the present invention Figure 17 The right view; Figure 20 A front view of the first seal provided in an embodiment of the present invention; Figure 21 Provided for embodiments of the present invention Figure 20 DD sectional view.

[0056] like Figures 1 to 7 As shown, this embodiment provides a vehicle-mounted thermal storage heating device, which includes a housing 1 and at least one thermal storage component 2 disposed within the housing 1. A gap exists between the housing 1 and the outer wall of the thermal storage component 2. The thermal storage component 2 includes an electric heating element 21, a heat-conducting component 22, and a phase change thermal storage medium. The heat-conducting component 22 is sleeved on the outside of the electric heating element 21, and the space between the heat-conducting component 22 and the electric heating element 21 is filled with the phase change thermal storage medium. An air inlet 11 and an air outlet 12 are provided on the housing 1. The air inlet 11, the air outlet 12, and the gap between the housing 1 and the outer wall of the thermal storage component 2 together constitute an air duct for air circulation. The phase change thermal storage medium absorbs the heat generated by the electric heating element 21 and transfers the heat to the heat-conducting component 22. The heat-conducting component 22 dissipates the heat from the phase change thermal storage medium to the outside of the housing 1 via the air duct.

[0057] The vehicle-mounted heat storage and heating device provided in this embodiment can be applied to pure electric vehicles. It releases heat into the interior space of the electric vehicle to achieve its heating function. Depending on the interior layout and structure of the electric vehicle, the device can typically be placed under the rear seats with its air outlet 12 facing forward of the seats, effectively heating the entire interior space. Of course, for different interior layouts, the device can also be placed in other parts of the vehicle; this embodiment does not impose any limitations. Furthermore, the vehicle-mounted heat storage and heating device provided in this embodiment is not limited to pure electric vehicles; it can also be applied to other places requiring heating, such as hybrid electric vehicles, gasoline vehicles, or rooms, which will not be elaborated further here.

[0058] Specifically, taking the application of vehicle-mounted thermal storage heating device in pure electric vehicles as an example, the vehicle-mounted thermal storage heating device mainly consists of a shell 1 and a thermal storage component 2 installed inside the shell 1. The shell 1 is used to accommodate and support the thermal storage component 2. The thermal storage component 2 is used to generate and store heat, and release the heat to the outside of the shell 1 when needed, so as to carry out convective heat exchange with the air inside the vehicle, thereby raising the temperature inside the vehicle and realizing the heating function of the vehicle-mounted thermal storage heating device.

[0059] The heat storage component 2 mainly consists of an electric heating element 21, a heat-conducting component 22, and a phase change heat storage medium. The heat-conducting component 22 can be a hollow tubular or cylindrical structure. The electric heating element 21 is disposed inside the heat-conducting component 22, and the space between the electric heating element 21 and the inner wall of the heat-conducting component 22 is filled with the phase change heat storage medium. The electric heating element 21 is used to connect to an external power source. When the external power source is turned on, the electric heating element 21 converts electrical energy into heat energy. The heat generated by the electric heating element 21 can be transferred to the phase change heat storage medium through heat conduction. The phase change heat storage medium stores the heat, and when the temperature inside the vehicle is low and heating is required, the phase change heat storage medium can transfer the heat to the heat-conducting component 22, which then dissipates the heat to the outside of the casing 1 through heat convection, thereby raising the temperature inside the vehicle.

[0060] In this embodiment, the housing 1 of the vehicle-mounted heat storage and heating device is provided with an air inlet 11 and an air outlet 12, and there is a gap between the inner wall of the housing 1 and the outer wall of the heat storage component 2. The air inlet 11, the air outlet 12 and the gap together form an air duct for air circulation. After absorbing the heat transferred by the phase change heat storage medium, the heat conduction component 22 can dissipate the heat into the gap in a convection manner. Outside air enters the housing 1 from the air inlet 11. When the air flows in the gap, it will absorb the heat dissipated by the heat conduction component 22 and its temperature will rise. After the temperature rises, the air flows out of the housing 1 from the air outlet 12. The air circulates in this way, so that the temperature inside the vehicle continues to rise.

[0061] This embodiment utilizes a phase change thermal storage medium for heat transfer and storage, which improves heat conduction efficiency and energy utilization. Currently, solid-liquid phase change energy storage materials are widely used. This embodiment uses a solid-liquid phase change energy storage material as an example. The heat generated by the electric heating element 21 is transferred to the solid-liquid phase change energy storage material, causing its temperature to rise. When the temperature of the solid-liquid phase change energy storage material is higher than its phase change temperature, the phase changes from solid to liquid, absorbing heat; when the temperature is lower than the phase change temperature, the phase changes from liquid to solid, releasing heat. This heat absorption and release process of the solid-liquid phase change energy storage material is reversible, thus allowing for reuse.

[0062] It should be noted that in this embodiment, the circuit of the on-board thermal storage heating device can be integrated into the charging circuit of the electric vehicle. When the electric vehicle is charging via a ground charging station, the heating element 21 of the on-board thermal storage heating device can be heated simultaneously. Heat can be stored using a phase change thermal storage medium. During vehicle operation, when the interior temperature is low, the phase change thermal storage medium can release heat to provide warmth for the driver and passengers. In this process, since the on-board thermal storage heating device is heated directly using the electrical energy of the charging station during electric vehicle charging, there is no need to consume the electrical energy of the electric vehicle's battery. This improves the electric vehicle's range and reduces the matching power of the battery, thereby lowering the manufacturing cost of the electric vehicle.

[0063] Besides directly charging the vehicle-mounted thermal storage heating device using ground charging stations, the heating element 21 can also be heated by the vehicle's battery during off-peak hours (such as at night). The phase change thermal storage medium absorbs and stores the heat generated by the heating element 21, changing from a solid to a liquid state. During peak hours, the electrical connection between the vehicle-mounted thermal storage heating device and the vehicle battery is disconnected, the heating element 21 stops working, and the temperature of the phase change thermal storage medium drops below its phase change temperature, causing it to change from a liquid to a solid state. The phase change thermal storage medium releases heat, which is then exchanged with the air inside the vehicle through the heat-conducting component 22, raising the ambient temperature inside the vehicle. Thus, by using a phase change thermal storage medium for heat absorption, storage, and release, the vehicle-mounted thermal storage heating device can fully utilize the electricity stored during off-peak hours and use the stored heat for heat exchange during peak hours to raise the ambient temperature. This aligns with the trend of peak shaving and valley filling to optimize grid power supply efficiency and improves the energy utilization rate of the vehicle-mounted thermal storage heating device.

[0064] Optionally, the phase change thermal storage medium can be a graphene composite phase change thermal storage medium. In this embodiment, the phase change thermal storage medium used for heat conduction and heat storage can be an organic phase change material. Specifically, the matrix material of the organic phase change material can be paraffin wax or stearic acid. Paraffin wax and stearic acid are fatty acid phase change materials, which are harmless to the human body. Paraffin wax and stearic acid are neutral in their liquid state, have stable chemical properties, and do not exhibit supercooling. Their volume change rate is very small, having minimal impact on the container's sealing, pressure resistance, and service life.

[0065] The solid density of paraffin is 900 kg / m³. 3 The liquid density is 860-890 kg / m³ 3 Its specific heat capacity is 2.14-2.9 KJ / kg·K, heat of fusion is 200-220 KJ / kg·K, thermal conductivity is 0.15 W / m·℃, and phase transition temperature is 42℃-63℃; the solid density of stearic acid is 965 kg / m³. 3 The liquid density is 848-878 kg / m³3 It has a specific heat capacity of 2.2 kJ / kg·K, a heat of fusion of 219.36 kJ / kg·K, a thermal conductivity of 0.172 W / m·℃, and a phase change temperature of 56.8℃-68.9℃.

[0066] The latent heat of phase change of stearic acid is comparable to that of paraffin. Stearic acid has good recyclability, but it is prone to leakage when melted and has a higher cost, with its unit price being more than four times that of paraffin. Therefore, paraffin is preferred as the organic phase change material in this embodiment. However, paraffin has the disadvantage of low thermal conductivity and poor thermal performance.

[0067] Therefore, to address the drawback of paraffin's low thermal conductivity and improve its thermal conductivity characteristics, thereby enhancing the overall thermodynamic performance of the vehicle-mounted thermal storage and heating device, this embodiment incorporates a thermally conductive material mixed into paraffin to form a phase change thermal storage medium. This mixed thermally conductive material may include copper powder, silicon powder, micro / nano graphite powder, carbon powder, carbon nanowires, carbon nanotubes, or graphene; graphene is preferred in this embodiment. Graphene has a resistivity of only about 10⁻⁶ Ω·cm, lower than copper or silver, a thermal conductivity of 5300 W / m·℃, a large specific surface area reaching 2630 m² / g, and a thermal conductivity 35,000 times that of paraffin. It can form a large contact area with paraffin, significantly improving its thermal conductivity. Furthermore, the fewer and thinner the layers of graphene, the better its thermal conductivity.

[0068] like Figure 6 As shown, in one specific embodiment, the number of heat storage components 2 can be three, and the three heat storage components 2 can be arranged in parallel and spaced apart. As mentioned above, in this embodiment of the vehicle-mounted heat storage heating device, at least one heat storage component 2 is provided inside the housing 1. Specifically, in combination with the spatial layout inside the vehicle, three heat storage components 2 can be provided inside the housing 1. For example, for vehicle-mounted heat storage heating devices placed in small spaces such as the rear seats inside the vehicle, these three heat storage components 2 can be arranged in parallel and spaced apart. By setting three heat storage components 2, not only can a higher heat dissipation efficiency be achieved, and the vehicle-mounted heat storage heating device has sufficient heat transfer and heat dissipation volume, it can be ensured that the vehicle-mounted heat storage heating device can effectively act on the overall space inside the vehicle; furthermore, the space occupied by the three heat storage components 2 arranged in parallel and spaced apart is small, which can effectively utilize the small space inside the vehicle for placement.

[0069] The gaps between the three heat storage components 2 are used to form the aforementioned air duct. Each heat storage component 2 dissipates heat into the surrounding gap space through its outer wall. Outside air enters the housing 1 from the air inlet 11, absorbs the heat in the gap space between the heat storage components 2 to form hot air, and the hot air is dissipated into the vehicle interior through the air outlet 12 to heat the vehicle interior environment and achieve the heating function.

[0070] In addition, depending on the size of the vehicle, the vehicle-mounted heat storage heating device of this embodiment may also have two, four or five heat storage components 2 in the housing 1, etc. This embodiment does not limit this.

[0071] like Figure 6 and Figure 7 As shown, in this embodiment, the heat-conducting component 22 may include at least one heat-conducting pipe, one end of which is closed and the other end is open, and the electric heating element 21 can extend into the heat-conducting pipe from the opening; wherein, the opening may be provided with a sealing component 23, which closes the opening so that the heat storage component 2 forms a closed cavity.

[0072] The heat-conducting component 22 can specifically be a heat-conducting pipe sleeved on the outside of the electric heating element 21. In this embodiment, a heat-conducting pipe can be sleeved on the electric heating element 21, or multiple heat-conducting pipes can be sleeved sequentially from the inside to the outside. One end of the heat-conducting pipe is closed, while the other end has an opening. The electric heating element 21 can be placed inside the heat-conducting pipe through the opening, and the phase change heat storage medium can also be filled into the space between the electric heating element 21 and the inner wall of the heat-conducting pipe through the opening.

[0073] A sealing component 23 is provided at one end of the heat pipe opening. The sealing component 23 can seal the opening of the heat pipe and fix the electric heating element 21 inside the heat pipe. This allows the heat storage component 2 to form a closed cavity, which can seal the phase change heat storage medium inside the closed cavity, preventing leakage of the phase change heat storage medium and ensuring that the phase change heat storage medium can play a good role in heat storage and heat transfer. At the same time, it can prevent damage to the vehicle heat storage heating device or the internal components of the car due to leakage of the phase change heat storage medium.

[0074] like Figures 6 to 10 As shown, in order to increase the heat transfer area of ​​the heat pipe and improve its strength, in this embodiment, the heat pipe can be a corrugated pipe formed by continuous bending of the outer wall, and the longitudinal section of the corrugated pipe can be wavy.

[0075] By setting the heat pipe as a corrugated tube made of rolled metal, the corrugated tube is a thin-walled, corrugated shell 1 with multiple transverse corrugations, that is, the longitudinal section of the corrugated tube can form a wave shape. By setting the heat pipe as a corrugated tube, the multiple transverse corrugations on the tube wall not only increase the contact area between the heat pipe and the phase change heat storage medium, that is, increase the heat transfer area of ​​the heat pipe, the heat of the phase change heat storage medium can be transferred to the heat pipe faster and more comprehensively, and the heat can be dissipated into the gaps of the shell 1 more quickly through the wavy curved surface of the heat pipe.

[0076] Furthermore, because corrugated pipes are thin-walled metal tubes with multiple transverse corrugations along their longitudinal direction, they possess good elasticity and can displace under pressure, axial force, lateral force, or bending moment. They also offer advantages such as corrosion resistance and high-temperature resistance. The corrugated pipes, formed by rolling metal, can absorb vibration energy, providing excellent shock absorption during vehicle bumps and when the phase change heat storage medium is in significant motion. Especially for phase change heat storage media that undergo phase transformation within the heat pipe, the corrugated pipe's ability to absorb axial, radial, and three-dimensional displacements and compensate for them using the elastic deformation capacity of the pipe wall gives it good bending, tensile, and compressive strength, reducing the risk of heat pipe rupture.

[0077] In one specific embodiment, the heat-conducting component 22 may include a first heat-conducting pipe 221, a second heat-conducting pipe 222, and a third heat-conducting pipe 223 arranged sequentially from the inside to the outside. The electric heating element 21 may be located inside the first heat-conducting pipe 221. The gaps between the electric heating element 21 and the first heat-conducting pipe 221, the gaps between the first heat-conducting pipe 221 and the second heat-conducting pipe 222, and the gaps between the second heat-conducting pipe 222 and the third heat-conducting pipe 223 are all filled with a phase change heat storage medium.

[0078] like Figures 7 to 10 As shown, in this embodiment, the heat-conducting assembly 22 sleeved on the outside of the electric heating element 21 includes a first heat-conducting pipe 221, a second heat-conducting pipe 222, and a third heat-conducting pipe 223. From the inside to the outside, the first heat-conducting pipe 221, the second heat-conducting pipe 222, and the third heat-conducting pipe 223 are arranged in sequence. The cross-sectional dimensions of the first heat-conducting pipe 221 to the third heat-conducting pipe 223 increase sequentially. There are gaps between the first heat-conducting pipe 221 and the second heat-conducting pipe 222, and between the second heat-conducting pipe 222 and the third heat-conducting pipe 223. In this way, not only is the space between the electric heating element 21 and the first heat-conducting pipe 221 filled with a phase change heat storage medium, but the space between the first heat-conducting pipe 221 and the second heat-conducting pipe 222, and between the second heat-conducting pipe 222 and the third heat-conducting pipe 223 can also be filled with a phase change heat storage medium.

[0079] On the one hand, by sequentially assembling the first heat pipe 221, the second heat pipe 222, and the third heat pipe 223 to form a three-layer heat pipe structure, the phase change heat storage medium in the first heat pipe 221 is directly heated by the electric heating element 21. When the phase change heat storage medium in the first heat pipe 221 is heated, it forms a temperature difference with the phase change heat storage medium in the second heat pipe 222, so that heat can be transferred from the phase change heat storage medium in the first heat pipe 221 to the phase change heat storage medium in the second heat pipe 222, causing the phase change heat storage medium in the second heat pipe 222 to be heated. Similarly, after the phase change heat storage medium in the second heat pipe 222 is heated, it transfers heat to the phase change heat storage medium in the third heat pipe 223.

[0080] Thus, the temperature of the phase change heat storage medium filled in the first heat pipe 221, the second heat pipe 222, and the third heat pipe 223 decreases sequentially, and the temperature of the phase change heat storage medium filled in the outermost third heat pipe 223 is relatively the lowest, which can improve the safety performance of the vehicle-mounted heat storage heating device.

[0081] On the other hand, the three-layer heat pipe structure improves the overall mechanical properties of the heat storage component 2, enhancing its resistance to bending, tension, and compression. Simultaneously, by separating the phase change heat storage medium within different heat pipes, the capacity of the phase change heat storage medium in a single heat pipe is reduced. In special circumstances such as vehicle damage, if the third heat pipe 223 of the heat storage component 2 is damaged, while the second heat pipe 222 and the first heat pipe 221 remain undamaged, only the phase change heat storage medium within the third heat pipe 223 will leak, while the phase change heat storage medium within the second heat pipe 222 and the first heat pipe 221 will remain in a sealed environment. Similarly, if both the third heat pipe 223 and the second heat pipe 222 are damaged, while the first heat pipe 221 remains undamaged, the phase change heat storage medium within the third heat pipe 223 and the second heat pipe 222 will leak, while the phase change heat storage medium within the first heat pipe 221 will remain in a sealed environment.

[0082] As described above, by setting a three-layer heat pipe structure, the overall strength of the heat storage component 2 can be improved, the risk of the heat storage component 2 being reduced, the probability of leakage of the phase change heat storage medium inside the heat storage component 2 can be reduced, and the safety performance of the vehicle-mounted heat storage heating device can be improved.

[0083] It should be noted that the first heat pipe 221, the second heat pipe 222, and the third heat pipe 223 can all be corrugated pipes as described above. The corrugated pipes can have thin cylindrical walls, and based on the characteristic that the diameters of the first heat pipe 221 to the third heat pipe 223 increase sequentially, the size of the transverse corrugations on the walls of the first heat pipe 221, the second heat pipe 222, and the third heat pipe 223 can increase sequentially. Furthermore, depending on actual needs, the cross-sections of the first heat pipe 221, the second heat pipe 222, and the third heat pipe 223 can also be square, rectangular, elliptical, or other shapes; this embodiment does not impose any limitations.

[0084] Depending on the different heating needs of different vehicles, the heat conduction component 22 may include only the first heat conduction pipe 221 and the second heat conduction pipe 222, or, in addition to the first heat conduction pipe 221, the second heat conduction pipe 222 and the third heat conduction pipe 223, a fourth heat conduction pipe may be installed outside the third heat conduction pipe 223, or even a fifth heat conduction pipe may be installed outside the fourth heat conduction pipe, which will not be elaborated here.

[0085] like Figures 7 to 10As shown, in the case where the heat-conducting component 22 includes a first heat-conducting pipe 221, a second heat-conducting pipe 222, and a third heat-conducting pipe 223, the openings of the first heat-conducting pipe 221, the second heat-conducting pipe 222, and the third heat-conducting pipe 223 can be respectively provided with a first connector 2211, a second connector 2221, and a third connector 2231, which abut against each other.

[0086] like Figure 7 As shown, the openings of the first heat pipe 221, the second heat pipe 222, and the third heat pipe 223 are respectively provided with a first connector 2211, a second connector 2221, and a third connector 2231. The inner walls of the third connector 2231 and the second connector 2221 are both provided with stepped surfaces. The outer wall of the first connector 2211 abuts against the stepped surface of the second connector 2221, and the outer wall of the second connector 2221 abuts against the stepped surface of the third connector 2231.

[0087] For example, such as Figure 10 As shown, the third connector 2231 at the opening of the third heat pipe 223 can be a flange, which is welded to the opening, and the inner wall of the flange has an inner stepped surface; as shown Figure 9 As shown, the second connector 2221 of the opening of the second heat pipe 222 is also a flange. The outer wall of this flange overlaps the inner stepped surface of the flange of the third heat pipe 223, and the two abut against each other. The inner wall of the flange of the second heat pipe 222 also has a stepped surface; as shown Figure 8 As shown, the first connector 2211 of the opening of the first heat pipe 221 is also a flange. The outer wall surface of the flange of the first heat pipe 221 overlaps the stepped surface of the flange of the second heat pipe 222, and the two abut against each other, so that the three heat pipes form an integral structure.

[0088] For the sealing of the openings of the first heat pipe 221, the second heat pipe 222, and the third heat pipe 223, such as Figure 7 As shown, the end faces of the first connector 2211, the second connector 2221, and the third connector 2231 can be flush. The sealing assembly 23 may include a first sealing element 231 and a second sealing element 232 sequentially disposed on the end faces. The first connector 2211, the second connector 2221, and the third connector 2231 abut against each other to form an integral structure of the first heat pipe 221, the second heat pipe 222, and the third heat pipe 223, and the end faces of the first connector 2211, the second connector 2221, and the third connector 2231 form a plane.

[0089] The sealing assembly 23 is disposed on the plane formed by the end faces of the first connector 2211, the second connector 2221, and the third connector 2231. The sealing assembly 23 includes a first sealing element 231 and a second sealing element 232. The first sealing element 231 is disposed on the cross-section, and the second sealing element 232 is disposed on the first sealing element 231. Taking a flange where the first connector 2211, the second connector 2221, and the third connector 2231 are all mutually abutting, as an example, the first sealing element 231 can be a flange cover covering the flange. A groove 2232 can be provided on the end face of the third connector 2231, and a first sealing ring 2233 can be disposed within the groove 2232. The sealing element seals the flange cover and the flange, which can be connected by fastening bolts 41 and fastening nuts 42. For example, the sealing element disposed between the flange cover and the flange can be a rectangular sealing ring.

[0090] To secure the electric heating element 21 and enhance the sealing performance of the sealing assembly 23, a second sealing element 232 is provided in addition to the first sealing element 231. The second sealing element 232 can be a sealing flange, and the sealing flange, flange cover, and flange plate are connected by a lock nut 43 and a tapered locking bolt 44. A second sealing ring 45 is provided between the sealing flange and the flange cover to seal the gap between them. For example, the second sealing ring 45 can be an O-ring. A third sealing ring 46 is also provided at the bolt holes of the flange cover to seal the gap between the bolt holes and the tapered locking bolt 44. For example, the third sealing ring 46 can be a frustum-shaped sealing ring.

[0091] like Figure 7 and Figure 11 As shown, in one specific embodiment, the second sealing member 232 may be provided with a connecting hole, the end of the electric heating element 21 is located inside the connecting hole, and the power terminal 211 connected to the end of the electric heating element 21 is located outside the second sealing member 232. By providing a connecting hole on the second sealing member 232, the end of the electric heating element 21 is located inside the connecting hole, which can fix the electric heating element 21. Furthermore, the power terminal 211 of the electric heating element 21 can extend to the outside of the second sealing member 232 through the connecting hole, so that the power terminal 211 can be connected to an external power source, and the electric heating element 21 can be heated by electricity.

[0092] For example, the electric heating element 21 can be a U-shaped electric heating tube, and there can be two connecting holes on the second sealing member 232, which correspond to the two electrical terminals of the U-shaped electric heating tube respectively.

[0093] like Figures 2 to 6As shown, to accelerate airflow within the duct and improve the heat transfer efficiency of the vehicle-mounted thermal storage heating device, in one possible implementation, the air inlet 11 and the air outlet 12 can be respectively located on opposite sides of the outer wall of the housing 1. This allows the air entering through the air inlet 11 to pass through the gap between the housing 1 and the outer wall of the thermal storage component 2 in an almost parallel airflow direction, absorbing heat from the heat-conducting component 22, and then being discharged from the air outlet 12 into the vehicle interior, raising the ambient temperature inside the vehicle. This method accelerates the airflow within the vehicle-mounted thermal storage heating device, allowing the heat from the device to be dissipated into the vehicle interior more quickly, resulting in high heat dissipation efficiency and good heating effect.

[0094] Optional, such as Figures 3 to 6 As shown, in order to increase the air pressure inside the vehicle-mounted thermal storage heating device, further accelerate the air flow rate inside its shell 1, and improve its heat transfer and heat dissipation efficiency, a fan assembly 3 can also be provided on the outer wall of the shell 1. The fan assembly 3 corresponds to the air inlet 11 and is used to send air into the shell 1 through the air inlet 11.

[0095] A fan assembly 3 is also provided on the outer wall of the housing 1. The fan assembly 3 is correspondingly located at the air inlet 11 of the housing 1. The fan assembly 3 delivers airflow into the housing 1. The fan assembly 3 can compress the outside air, increase the air pressure and flow speed inside the housing 1, increase the heat exchange efficiency between the air and the heat storage component 2, absorb heat more quickly and dissipate the heat to the outside of the housing 1, and improve the heating effect of the vehicle-mounted heat storage heating device.

[0096] Specifically, such as Figures 3 to 6 As shown, the fan assembly 3 may include a fixing plate 31, a fan cover 32 and at least one fan 33. The fixing plate 31 may be connected to the housing 1. The fan cover 32 is disposed on the fixing plate 31. The fan 33 is disposed inside the fan cover 32, and the exhaust port of the fan 33 is opposite to the air inlet 11. The fan cover 32 may be provided with an air inlet 321.

[0097] The fan assembly 3 mainly consists of a fixing plate 31, a fan cover 32, and a fan 33. The fixing plate 31 can be fixed to the housing 1 by bolts or screws and other connecting parts. The fan cover 32 is used to cover the fan 33 and protect it. The fan cover 32 can also be fixed to the fixing plate 31 by the above-mentioned connecting parts. The fan 33 is set inside the fan cover 32, and the exhaust port of the fan 33 is correspondingly set with the air inlet 11 on the housing 1 so that the air discharged by the fan 33 can directly enter the housing 1 through the air inlet 11. In the case where the air inlet 11 and air outlet 12 on the housing 1 are located on opposite sides of the housing 1 and correspond to each other, the exhaust port of the fan 33 is also opposite to the air outlet 12 on the housing 1. The airflow discharged by the fan 33 can pass parallel through the gap between the housing 1 and the outer wall of the heat storage component 2. The airflow and the heat storage component 2 transfer heat through convection, so that the air discharged by the fan 33 obtains the heat of the heat storage component 2 and is heated. Then it is discharged from the air outlet 12 on the housing 1, which achieves the effect of heating the vehicle interior.

[0098] For example, such as Figure 6 As shown, the fan 33 can be a centrifugal fan 33. The centrifugal fan 33 has axial air intake at both ends and radial air exhaust, which has the advantages of stable operation and low noise. The operating voltage of the centrifugal fan 33 can be adjusted to change the speed of the centrifugal fan 33, thereby adjusting the output air volume of the centrifugal fan 33. By changing the output air volume, the amount of heat output to the vehicle interior by the vehicle-mounted thermal storage heating device can be adjusted. Users can adjust the operating voltage of the centrifugal fan 33 according to the temperature comfort level inside the vehicle.

[0099] By arranging air inlets 321 on the fan cover 32, the air intake volume of the fan assembly 3 can be guaranteed, while also serving to safely isolate and protect the centrifugal fan 33 inside the fan cover 32. The number and position of the air inlets 321 can be set according to actual needs, so that outside air can flow quickly through the air inlets 321 to the centrifugal fan 33, and then be sent into the housing 1 of the vehicle-mounted thermal storage heating device by the centrifugal fan 33.

[0100] It should be noted that, depending on the requirements for air intake volume and air flow rate, two centrifugal fans 33 can be arranged in parallel at intervals inside the fan cover 32. These two centrifugal fans 33 are fixed to the fixing plate 31 by connectors, and the exhaust ports of both centrifugal fans 33 are opposite to the air inlets 11 on the housing 1. Alternatively, for vehicle-mounted thermal storage heating devices with higher requirements for air intake volume, air pressure, and flow rate, three or four centrifugal fans 33 can be arranged inside the fan cover 32, etc. This embodiment does not impose any restrictions on this.

[0101] like Figures 12 to 18As shown, in one possible implementation, the housing 1 may include a base 13, and a fixing member 14 may be provided on the inner wall of the base 13. The fixing member 14 is snapped onto the outer wall of the heat storage component 2. The housing 1 includes a base 13. When installing the vehicle-mounted heat storage heating device, the base 13 is opposite to the vehicle floor. The vehicle-mounted heat storage heating device is placed in the vehicle through the base 13 to improve the stability of the vehicle-mounted heat storage heating device. Furthermore, the fixing member 14 is provided on the inner wall of the base 13 facing the heat storage component 2. The fixing member 14 is an annular member. For example, for the heat storage component 2 whose outer wall is cylindrical, the fixing member 14 may have a circular hole. The circular hole matches the size of the outer wall of the heat storage component 2. The fixing member 14 is sleeved on the outer wall of the heat storage component 2, and the circular hole of the fixing member 14 can be snapped onto the outer wall of the heat storage component 2 to fix the heat storage component 2 and prevent the heat storage component 2 from shaking inside the housing 1.

[0102] Based on the axial length of the thermal storage component 2, multiple fasteners 14 can be spaced out on the base 13 along the length of the thermal storage component 2. Each fastener 14 is engaged with different parts of the thermal storage component 2 to ensure that the thermal storage component 2 can be firmly fixed on the base 13.

[0103] Specifically, such as Figures 13 to 16 As shown, in order to facilitate the connection between the fixing member 14 and the base 13 and the engagement between the fixing member 14 and the outer wall of the heat storage component 2, the fixing member 14 may include a first fixing member 141 and a second fixing member 142. One end of the first fixing member 141 is connected to the base 13, and the other end abuts against the side wall of one side of the heat storage component 2. The second fixing member 142 abuts against the side wall of the other side of the heat storage component 2. The first fixing member 141 and the second fixing member 142 are connected.

[0104] The fixing member 14 is formed by connecting the first fixing member 141 and the second fixing member 142. One end of the first fixing member 141 is fixedly connected to the inner wall of the base 13. Specifically, the first fixing member 141 can be fixed to the base 13 by means of connectors or welding. The first fixing member 141 has a slot that can be inserted into the heat storage component 2. After the heat storage component 2 is placed into the slot of the first fixing member 141, the second fixing member 142 is then engaged with the first fixing member 141. Similarly, the second fixing member 142 also has a slot that can be inserted into the heat storage component 2. After the second fixing member 142 and the first fixing member 141 are connected, the heat storage component 2 can be completely locked into the annular slot formed by the two, so as to achieve the purpose of fixing the heat storage component 2.

[0105] The connection between the first fixing member 141 and the second fixing member 142 facilitates the insertion of the heat storage component 2 into the fixing member 14, and also facilitates the installation and removal of the fixing member 14. Specifically, the first fixing member 141 and the second fixing member 142 can be hinged on one side, or connecting members can be provided on both sides of the first fixing member 141 and the second fixing member 142 to connect the first fixing member 141 and the second fixing member 142.

[0106] For example, such as Figures 14 to 16 For the overall cylindrical structure of the outer wall of the thermal storage component 2, the first fixing member 141 can be a U-shaped bracket, one end of which is fixed to the base 13, and the other end faces the thermal storage component 2, with a semi-circular arc-shaped groove for inserting the thermal storage component 2. The second fixing member 142 can be a C-shaped retaining ring, facing the other side of the thermal storage component 2, and also has a semi-circular arc-shaped groove for inserting the thermal storage component 2. The U-shaped bracket and the C-shaped retaining ring are joined to form a complete circular retaining hole, into which the thermal storage component 2 is inserted. Furthermore, screw holes can be provided at both ends where the U-shaped bracket and the C-shaped retaining ring connect, and the two can be fixed together by fastening bolts 41.

[0107] like Figure 6 As shown, in one possible implementation, a heat insulation layer 15 may be provided on the outer wall of the housing 1. By providing a heat insulation layer 15 on the outer wall of the housing 1, heat conduction between the inside and outside of the housing 1 can be isolated, so that the heat stored in the phase change heat storage medium inside the housing 1 is dissipated to the outside through the air outlet 12 on the housing 1, avoiding heat conduction to other parts of the housing 1 and causing unnecessary heat loss. This can improve the heating efficiency of the vehicle-mounted heat storage heating device.

[0108] For example, the insulation layer 15 can be made of silica aerogel, which is used as the main material and incorporated into reinforcing fibers to form a flexible thermal insulation material. It is the solid thermal insulation material with the lowest thermal conductivity in the 400°C temperature range, and its density is 180–220 kg / m³. 3 It has an applicable temperature range of -200℃ to +1000℃ and a thermal conductivity of 0.013-0.018w / m·k (25℃). It is hydrophobic and fireproof, which can effectively prevent the thermal insulation performance from weakening due to moisture absorption. It has a building fire resistance rating of A1.

[0109] In addition, the housing 1 of the vehicle-mounted thermal storage heating device can be assembled from a side plate 16 on one side onto the rest of the integrally formed plate. The side plate 16 can be fixedly connected to the integrally formed plate by screws or other connectors. Reinforcing ribs 161 can be provided on the outer wall of the side plate 16 to enhance the overall strength of the housing 1. The base 13 can be fixedly connected to the housing 1 by anchor screws 131.

[0110] The vehicle-mounted thermal storage heating device provided in this embodiment mainly consists of a shell and a thermal storage component installed inside the shell. The thermal storage component stores heat and dissipates it to the outside of the shell when needed. Specifically, the thermal storage component mainly includes an electric heating element, a heat-conducting component, and a phase change thermal storage medium. The electric heating element converts electrical energy into heat energy. The phase change thermal storage medium fills the space between the electric heating element and the heat-conducting component, transferring heat from the electric heating element to the phase change thermal storage medium through thermal conduction. The phase change thermal storage medium stores the heat and then transfers it to the heat-conducting component when needed. There is a gap between the outer wall of the thermal storage component and the shell. The heat-conducting component dissipates heat into the gap through thermal convection. An air inlet and an air outlet are provided on the shell. The air inlet, air outlet, and gap constitute an air duct for air circulation. Cold air from the outside enters the shell through the air inlet, exchanges heat with the heat-conducting component through convection in the air duct, and dissipates the hot air to the environment around the vehicle-mounted thermal storage heating device through the air outlet. The vehicle-mounted thermal storage heating device provided by this invention improves the overall thermodynamic performance of the device by using a phase change thermal storage medium to transfer and store heat. When applied to electric vehicles, it eliminates the need to consume the energy of the vehicle's battery. Instead, it utilizes a ground-based charging station to heat and store the heat, releasing it during vehicle operation to provide heating and thus improving the vehicle's range.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle-mounted heat storage heating device, wherein a circuit of the vehicle-mounted heat storage heating device is arranged on a charging circuit of an electric vehicle, characterized in that, The application relates to a heat storage device for an electric vehicle, which comprises a shell and at least one heat storage assembly arranged in the shell, and a gap between the shell and the outer wall of the heat storage assembly; the heat storage assembly comprises an electric heating element, a heat conducting assembly and a phase change heat storage medium; the heat conducting assembly is sleeved outside the electric heating element, and the phase change heat storage medium is filled between the heat conducting assembly and the electric heating element. An air inlet and an air outlet are arranged on the shell, and the air inlet, the air outlet and the gap between the shell and the outer wall of the heat storage assembly jointly form an air duct for air circulation; when the electric vehicle is charged by a ground charging base station and the electric heating element is heated, the phase change heat storage medium absorbs the heat generated by the electric heating element; during the driving of the electric vehicle, the phase change heat storage medium releases the absorbed heat and transmits the heat to the heat conducting assembly, and the heat conducting assembly dissipates the heat from the phase change heat storage medium to the outside of the shell through the air duct. The heat conducting assembly comprises at least one heat conducting pipe, one end of the heat conducting pipe is closed, the other end is open, and the electric heating element extends into the heat conducting pipe from the opening; wherein the opening is provided with a sealing assembly, and the sealing assembly closes the opening to form a closed cavity of the heat storage assembly. The heat conducting assembly comprises a first heat conducting pipe, a second heat conducting pipe and a third heat conducting pipe which are sequentially sleeved from inside to outside, the electric heating element is located in the first heat conducting pipe, and the phase change heat storage medium is filled in the gaps between the electric heating element and the first heat conducting pipe, the gaps between the first heat conducting pipe and the second heat conducting pipe and the gaps between the second heat conducting pipe and the third heat conducting pipe. The opening of the first heat conducting pipe, the opening of the second heat conducting pipe and the opening of the third heat conducting pipe are respectively provided with a first connecting piece, a second connecting piece and a third connecting piece, the inner wall of the third connecting piece and the inner wall of the second connecting piece are provided with a stepped surface, the outer wall of the first connecting piece abuts against the stepped surface of the second connecting piece, and the outer wall of the second connecting piece abuts against the stepped surface of the third connecting piece.

2. The vehicle-mounted heat storage heating device according to claim 1, characterized in that, The heat conducting pipe is a corrugated pipe formed by continuously bending the outer wall, and the longitudinal section of the corrugated pipe is wave-shaped.

3. The vehicle-mounted heat storage heating device according to claim 1 or 2, characterized in that, The number of the heat storage assemblies is three, and the three heat storage assemblies are arranged in parallel and at intervals.

4. The vehicle-mounted heat storage heating device according to claim 1 or 2, characterized in that, The air inlet and the air outlet are respectively arranged on opposite sides of the outer wall of the shell.

5. The vehicle-mounted heat storage heating device according to claim 4, characterized in that, A fan assembly is arranged on the outer wall of the shell, the fan assembly corresponds to the air inlet, and the fan assembly is used for supplying air to the inside of the shell through the air inlet.

6. The vehicle-mounted heat storage heating device according to claim 5, characterized in that, The fan assembly comprises a fixed plate, a fan cover and at least one fan, the fixed plate is connected to the shell, the fan cover is arranged on the fixed plate, the fan is arranged in the fan cover, and the air outlet of the fan is opposite to the air inlet; wherein the fan cover is provided with an air inlet hole.

7. The heat storage and heating device for vehicle according to claim 1 or 2, characterized in that, The shell comprises a base, a fixed piece is arranged on the inner wall of the base, and the fixed piece is clamped on the outer wall of the heat storage assembly.

8. The vehicle-mounted heat storage heating device according to claim 7, characterized in that, The fixing member comprises a first fixing member and a second fixing member, one end of the first fixing member is connected with the base, the other end is abutted with the side wall of one side of the heat storage assembly, the second fixing member is abutted with the side wall of the other side of the heat storage assembly, and the first fixing member and the second fixing member are connected.

9. The on-vehicle heat storage heating device according to claim 1, characterized by End faces of the first connecting member, the second connecting member and the third connecting member are flush, and the sealing assembly comprises a first sealing member and a second sealing member arranged on the end faces in sequence.

10. The vehicle-mounted heat storage heating device according to claim 9, characterized in that, A communication hole is arranged on the second sealing member, an end portion of the electric heating element is located in the communication hole, and an electric terminal connected with the end portion of the electric heating element is located outside the second sealing member.

11. The heat storage and heating device for vehicle according to claim 1 or 2, characterized in that, An insulating layer is arranged on the outer wall of the shell.

12. The on-vehicle heat storage heating device according to claim 1 or 2, characterized by The phase change heat storage medium is a graphene composite phase change heat storage medium.

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