Battery module thermal control system and new energy vehicles

Abstract

The present invention is applicable to the field of new energy, and provides a battery assembly heat control system and a new energy vehicle, the system includes a fuel storage device, a heating device connected to the fuel storage device, and a battery assembly; the heating device includes a heating part, a heat pipe and a heat transfer medium storage part, the heating part is used to catalytically burn the fuel flowing in from the fuel storage device to generate heat; the heat pipe is used to receive the heat transfer medium flowing in from the heat transfer medium storage part, and use the heat generated by the heating part to heat the heat transfer medium to obtain the heated heat transfer medium; when the temperature of the battery assembly is lower than the first preset threshold, the heated heat transfer medium flows through the battery assembly to increase the temperature of the battery assembly. The system of the present invention generates heat through the catalytic combustion of fuel, and can flexibly provide the required heat to the battery assembly according to the temperature of the battery assembly, ensuring that the battery assembly can work normally in low or high temperature environments, and significantly reducing the capacity decay of the battery assembly.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to a battery assembly heat control system and a new energy vehicle. Background Art

[0002] With the "carbon peak" and "carbon reduction" commitments, as well as energy security considerations, electric energy transportation equipment is gradually replacing traditional energy transportation equipment. The power drive device in electric energy equipment is generally a battery, and battery performance is the main factor affecting the endurance of transportation tools (such as new energy vehicles, etc.).

[0003] In the prior art, the commonly used batteries are mainly lead-acid batteries, nickel-metal hydride batteries and lithium-ion batteries. Lead-acid batteries have been gradually eliminated by the market due to their high pollution and low energy density. Nickel-metal hydride batteries are expensive to produce and have low energy density, and their application in the field of new energy vehicles has gradually decreased. Emerging lithium-ion batteries (such as ternary lithium batteries and lithium iron phosphate batteries) have gained more and more attention and favor due to their high energy density, long cycle life, low self-discharge rate, and other advantages. In addition, retired lithium-ion batteries are also gradually being used in large-scale energy storage stations and base station communication batteries. However, lithium-ion batteries are more sensitive to temperature. When the ambient temperature is above 0°C, the battery capacity decays slowly, but when the temperature is too high, thermal runaway is very likely to occur, causing safety accidents. When the ambient temperature drops below 0°C, the internal resistance of the battery will increase sharply as the temperature decreases, and the battery capacity decays faster. For example, when the temperature is 0°C, the discharge capacity of the lithium iron phosphate battery is equivalent to 88.05% of the capacity at 25°C, 65.52% at -10°C, and only 38.88% at -20°C. The battery capacity decays rapidly. Therefore, the optimal operating temperature of the lithium iron phosphate battery is in the temperature range of 20°C~30°C. However, the temperature in northern my country may drop to -40°C in winter, and the temperature in southern China may rise to 40°C in summer. The existing lithium batteries are prone to serious performance degradation during the temperature change between winter and summer. In addition, reports of electric vehicles in northern China halving their mileage or even breaking down in winter are not uncommon.

[0004] At present, in order to solve the problem of battery capacity attenuation at low temperatures, electric heating is usually used to preheat the battery pack before charging and starting the electric vehicle, preheating it to the operating temperature to increase its battery capacity, and then charging and discharging. For example, using PTC element electric heating, it consumes 2~3kWh of electricity for one hour of continuous driving. Calculated at 6 kilometers per kWh, air conditioning heating alone will cause the vehicle's cruising range to decline by 12~18 kilometers per hour, which seriously affects user use.

[0005] It can be seen that existing batteries are unable to manage heat, and are difficult to work normally in winter or low temperature environments or summer or high temperature environments. They have a short cruising range, require more electricity, and have a high cost. Summary of the invention

[0006] In view of the problems that batteries in the prior art cannot manage heat, have difficulty working normally in winter or low temperature environments or in summer or high temperature environments, have a short cruising range, require more electricity and have high costs, the present invention provides a battery assembly heat control system and a new energy vehicle.

[0007] An embodiment of the present invention provides a battery assembly heat control system, including:

[0008] A fuel storage device, a heating device connected to the fuel storage device, and a battery assembly;

[0009] The heat supply device comprises a heat supply part, a heat pipe and a heat transfer medium storage part, wherein the heat supply part is used to catalytically burn the fuel flowing in from the fuel storage device to generate heat; the heat pipe is used to receive the heat transfer medium flowing in from the heat transfer medium storage part, and use the heat generated by the heat supply part to heat the heat transfer medium to obtain the heated heat transfer medium;

[0010] When the temperature of the battery assembly is lower than a first preset threshold, the heated heat-conducting medium flows through the battery assembly to increase the temperature of the battery assembly.

[0011] An embodiment of the present invention further provides a new energy vehicle, which includes the battery assembly heat control system as described above.

[0012] The battery assembly heat regulation system provided by the embodiment of the present invention catalyzes the combustion of the fuel flowing in from the fuel storage device through the heating part of the heating device in the system to generate heat, receives the heat-conducting medium flowing in from the heat-conducting medium storage part through the heat-conducting pipe, and uses the heat generated by the heating part to heat the heat-conducting medium to obtain a heated heat-conducting medium. When the temperature of the battery assembly is lower than a first preset threshold value, the heated heat-conducting medium flows through the battery assembly to increase the temperature of the battery pack. That is, the required heat is provided to the battery assembly by generating heat through catalytic combustion of the fuel. This not only enables the battery assembly to work normally in a scenario with low ambient temperature, but also significantly reduces the performance decay rate of the battery assembly and saves electricity costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 is a structural schematic diagram of a first battery assembly heat control system provided by an embodiment of the present invention;

[0015] Figure 2 is a structural schematic diagram of a second battery assembly heat control system provided by an embodiment of the present invention;

[0016] Figure 3 is a structural schematic diagram of a third battery assembly heat control system provided by an embodiment of the present invention;

[0017] Figure 4 is a structural schematic diagram of a fourth battery assembly heat control system provided by an embodiment of the present invention;

[0018] Figure 5 is a structural schematic diagram of a fifth battery assembly heat control system provided by an embodiment of the present invention;

[0019] Figure 6 It is a schematic diagram of the arrangement of a cooling component of a heat transfer medium return pipeline provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] The battery assembly heat control system provided in the embodiment of the present invention uses fuel catalytic combustion to generate heat to exchange heat with the heat-conducting medium flowing through the heat-conducting tube to obtain a heated heat-conducting medium. When it is detected that the temperature of the battery assembly is lower than a first preset threshold, the heated heat-conducting medium flows through the battery assembly to increase the temperature of the battery assembly, thereby enabling the battery assembly to work normally in winter or in scenes with low ambient temperature, reducing the attenuation rate of the battery capacity of the battery assembly at low temperatures, and compared with the traditional method of preheating the battery assembly with electric heating to enable the battery to be used normally in a low temperature environment, there is no need to consume additional electric energy for heating, thereby reducing power consumption and reducing electricity costs.

[0022] Combination Figure 1 The embodiment of the present invention discloses a battery assembly heat control system, including:

[0023] A fuel storage device 01, a heating device connected to the fuel storage device 01, and a battery assembly 03; the heating device includes a heating part 021, a heat pipe 022 and a heat transfer medium storage part 023, the heating part 021 is used for catalytic combustion of the fuel flowing in from the fuel storage device 01 to generate heat; the heat pipe 022 is used for receiving the heat transfer medium flowing in from the heat transfer medium storage part 023, and using the heat generated by the heating part 021 to heat the heat transfer medium to obtain a heated heat transfer medium; when the temperature of the battery assembly 03 is lower than a first preset threshold value, the heated heat transfer medium flows through the battery assembly 03 to increase the temperature of the battery assembly 03.

[0024] In the embodiment of the present invention, the fuel in the fuel storage device 01 is methanol or methanol aqueous solution. When the molar fraction of methanol in the fuel is greater than 99%, the fuel is a pure methanol solution; when the molar fraction of methanol in the fuel is 50% to 98%, it is a methanol aqueous solution. For example, when the molar fraction of methanol in the fuel is 50%, the fuel is a mixed solution of methanol and water with a molar ratio of 1:1.

[0025] In the heating device, heat is generated by the oxidation reaction of methanol. Among them, the combustion heat of methanol is 723 kJ / moL, the combustion temperature is 20℃~600℃, the evaporation heat is 35.32 kJ / moL, and the boiling point is 64.6℃, while the evaporation heat of water is 40.67kJ / moL and the boiling point is 100℃. Compared with water, methanol is easier to evaporate and can generate more heat after combustion. The freezing point of pure methanol is -94℃, and the closed flash point is 9.4℃. The freezing point of a 50% mass fraction methanol solution (volume fraction is about 57.71%) is -54.3℃, the boiling point is 76.4℃, and the closed flash point is 24.4℃. Methanol of different concentrations is not easy to freeze at low temperatures, and can be used as an antifreeze for power systems, and can be portable and used in various working environments. In addition, the battery assembly heat control system provided by the embodiment of the present invention is highly compatible with the methanol fuel energy system. Only methanol as a single raw material needs to be stored and transported throughout the process, and transportation and storage are very convenient. Methanol has few emissions after catalytic combustion, and no formaldehyde, formic acid, sulfur oxides, or nitrogen oxides are emitted, which is green and environmentally friendly.

[0026] In the embodiment of the present invention, the heat supply part 021 is provided with a catalyst for catalyzing the combustion of methanol. The catalyst is in contact with methanol and catalyzes the flameless combustion reaction of methanol at normal temperature and pressure and releases heat.

[0027] In the embodiment of the present invention, the catalyst is disposed in the following ways: disposed at the bottom of the heating portion 021 ; disposed in layers on a multi-layer perforated plate (not shown); and / or coated on the outer wall of the heat pipe 022 .

[0028] In one embodiment of the present invention, the catalyst in the form of spherical particles can be directly laid out at the bottom of the heating part 021 (such as Figure 1 as shown).

[0029] In another embodiment of the present invention, a multi-layer perforated plate is provided in the heating part 021, and the catalyst can be laid out on the multi-layer perforated plate of the heating part 021, which can increase the contact area between the fuel and the catalyst, thereby improving the catalytic combustion efficiency of the fuel.

[0030] In another embodiment of the present invention, the ground catalyst may be coated on the outer wall of the heat pipe 022 by dipping or spraying.

[0031] In an embodiment of the present invention, in order to ensure the normal operation of the battery assembly heat control system, it is necessary to control the heating temperature of the heating part 021 not to exceed 600°C. Preferably, the heating temperature of the heating part 021 is regulated to 200°C~600°C, and the more preferred heating temperature is 200°C.

[0032] In the embodiment of the present invention, the heat transfer medium storage unit 023 stores a heat transfer medium, which may be water, heat transfer oil, molten salt, etc., preferably water. Molten salt refers to a melt formed by melting salts, such as alkali metal, alkaline earth metal halide, nitrate, and sulfate melts.

[0033] In the embodiment of the present invention, the working temperature of the battery assembly 03 is usually between 20°C and 30°C. When the temperature of the battery assembly 03 is lower than 20°C, if the battery is to be charged, it needs to be preheated, that is, the temperature of the battery assembly 03 is increased. Therefore, the first preset threshold here usually refers to the lowest temperature value of the normal operation of the battery assembly 03, that is, 20°C.

[0034] In an embodiment of the present invention, when it is detected that the temperature of the battery assembly 03 is lower than 20°C, the heated heat-conducting medium can be regulated to flow through the battery assembly 03 to increase the temperature of the battery assembly 03, so that the battery assembly 03 can quickly replenish heat in a low-temperature environment, thereby reducing the rate of capacity decay in a low-temperature environment.

[0035] Combination Figure 2In an embodiment of the present invention, the battery assembly 03 is provided with a first thermometer (not shown in the figure); the battery pack heat regulation system includes a first temperature control unit 04, the first temperature control unit 04 obtains the temperature of the battery assembly 03 through the first thermometer, and sets a first flow rate flowing through the battery assembly 03 according to a first temperature control rule and the temperature of the battery assembly 03.

[0036] In the embodiment of the present invention, the first thermometer is a temperature sensor. The first temperature control unit 04 includes a controller (not shown in the figure), and the controller can be a single chip microcomputer, such as a 51 single chip microcomputer.

[0037] The first flow rate refers to the amount of the heated heat-conducting medium flowing through the battery assembly 03 .

[0038] The first temperature control rule generally refers to the corresponding relationship between the temperature of the battery assembly 03 and the amount of the heated heat-conducting medium flowing through the battery assembly 03. For example, when the temperature of the battery assembly 03 is 20°C, the amount of the heated heat-conducting medium flowing through the battery assembly 03 is Q A When the temperature of the battery assembly 03 is 25°C, the amount of the heated heat-conducting medium flowing through the battery assembly 03 is Q B The specific correspondence between the temperature and the first flow rate can be set according to the actual needs of the normal operation of the battery pack, and is not limited in the present invention.

[0039] The first thermometer and the first temperature control unit 04 can be connected wirelessly (such as Bluetooth, WiFi, etc.) or wired. The first thermometer is used to monitor the operating temperature of the battery assembly 03 in real time and transmit the monitoring result to the first temperature control unit 04. The first temperature control unit 04 sets the first flow rate flowing through the battery assembly 03 according to the obtained temperature of the battery assembly 03 and the first temperature control rule and the temperature of the battery assembly 03. For example, when the first temperature control unit 04 obtains that the temperature of the battery assembly 03 is 20°C, the first flow rate flowing through the battery assembly 03 is set to Q according to the first temperature control rule and the temperature of the battery assembly 03. A .

[0040] Combination Figure 3 In an embodiment of the present invention, the above-mentioned heating part 021 is provided with a second thermometer (not shown in the figure) for measuring the heating temperature of the heating component; the battery assembly heat regulation system includes a second temperature control unit 05, and the second temperature control unit 05 sets the second flow rate of the fuel flowing into the heating part 021 according to the second temperature control rule and the heating temperature.

[0041] In the embodiment of the present invention, the second thermometer is a temperature sensor. The second temperature control unit 05 includes a controller (not shown in the figure), and the controller can be a single chip microcomputer, such as a 51 single chip microcomputer.

[0042] The second flow rate refers to the amount of fuel flowing from the fuel storage device 01 into the heating unit 021 .

[0043] The second temperature control rule generally refers to the corresponding relationship between the temperature of the heating part 021 and the amount of fuel flowing into the heating part 021. For example, when the temperature of the heating part 021 is 200°C, the amount of fuel flowing into the heating part 021 is Q C When the temperature of the heating section 021 is 250°C, the amount of fuel flowing into the heating section 021 is Q D The specific correspondence between the temperature and the second flow rate can be set according to the actual heat demand of the heating unit 021, and is not limited in the present invention.

[0044] The second thermometer and the second temperature control unit 05 can be connected wirelessly (such as Bluetooth, WiFi, etc.) or wired. The second thermometer is used to monitor the temperature of the heating component of the heating part 021 in real time, and transmit the monitoring result to the second temperature control unit 05. The second temperature control unit 05 sets the second flow rate flowing into the heating part 021 according to the obtained temperature of the heating part 021, the second temperature control rule and the heating temperature. For example, when the second temperature control unit 05 obtains that the temperature of the heating part 021 is 200°C, the second flow rate flowing into the heating part 021 is set to Q according to the second temperature control rule and the temperature of the heating part 021. C .

[0045] Combination Figure 4 In the embodiment of the present invention, the heat-conducting pipe 022 is connected to the heat-conducting medium storage part 023 through the first pipeline 06, and the heat-conducting medium in the heat-conducting medium storage part 023 flows into the heat-conducting pipe 022 through the first pipeline 06; the battery assembly 03 is provided with a first heat exchange structure (not shown in the figure), and the first heat exchange structure and the heat-conducting pipe 022 are connected through the second pipeline 07, and the heated heat-conducting medium flowing out of the heat-conducting pipe 022 flows into the first heat exchange structure through the second pipeline 07; the first heat exchange structure is arranged at the bottom or periphery of the battery assembly 03, and the battery assembly 03 is heated by the heated heat-conducting medium; a third pipeline 08 is arranged between the heat-conducting medium storage part 023 and the first heat exchange structure, and the heat-conducting medium flowing out of the first heat exchange structure flows back to the heat-conducting medium storage part 023 through the third pipeline 08.

[0046] Combination Figure 5 In an embodiment of the present invention, the second pipeline 07 is provided with a first branch line 071, one end of the first branch line 071 is connected to the second pipeline 07, and the other end is connected to the heat transfer medium storage 023; the first branch line 071 is provided with a flow regulating valve (not shown in the figure), and the opening of the flow regulating valve changes with the change of the flow of the third pipeline 08.

[0047] See also Figure 5 In the embodiment of the present invention, a warm air device 09 is further provided between the heat supply unit 021 and the heat transfer medium storage unit 023; the second pipeline 07 is provided with a second branch line 072, one end of the second branch line 072 is connected to the second pipeline 07, and the other end is connected to the warm air device 09; the warm air device 09 is connected to the heat transfer medium storage unit 023 via a fourth pipeline 010. The warm air device 09 is connected to the battery assembly 03 via a fifth pipeline 011.

[0048] See also Figure 5 In an embodiment of the present invention, the above-mentioned battery assembly 03 is provided with a second heat exchange structure (not shown in the figure); the fluid inlet of the second heat exchange structure is connected to the fuel outlet of the fuel storage device 01 through the sixth pipeline 012; the fluid outlet of the second heat exchange structure is connected to the fuel inlet of the fuel storage device 01 through the seventh pipeline 013; when the temperature of the battery assembly 03 is higher than the second preset threshold value, the temperature of the battery assembly 03 is reduced by the second heat exchange structure.

[0049] Generally, when the operating temperature of the battery assembly 03 is high, the battery performance will be significantly attenuated, and it is usually necessary to promptly cool down the battery assembly 03. Therefore, the second preset threshold value here usually refers to the maximum temperature value of the battery assembly 03 to maintain normal operation.

[0050] For example, if the maximum temperature tolerance of a battery assembly is 70° C., the second preset threshold value can be set to 70° C. It should be noted that the maximum temperature that batteries of different specifications can tolerate during normal operation may be different, so the second preset threshold value can be specifically set according to the maximum temperature tolerance of the battery during normal operation.

[0051] In the embodiment of the present invention, the first branch line 071, the third pipeline 08 and the fourth pipeline 010 are all provided with a cooling component (not shown in the figure), and the cooling component is used to cool the heat-conducting medium flowing back to the heat-conducting medium storage part 023. The cooling component can be an air cooler, a device that uses ambient air to cool the cooling medium. Of course, the cooling component can also be a cooling fan (such as a fan) provided between the first branch line 071, the third pipeline 08 and the fourth pipeline 010 and the heat-conducting medium storage part 023. Figure 6 By cooling the heat-conducting medium flowing back to the heat-conducting medium storage unit 023, the temperature of the heat-conducting medium in the heat-conducting medium storage unit 023 can be controlled to avoid excessively high temperature of the heat-conducting medium.

[0052] In the embodiment of the present invention, in order to ensure the normal operation of the system, it is usually necessary to make the difference between the temperature of the heat-conducting medium stored in the heat-conducting medium storage unit and the current room temperature less than 20° C. For example, if the current room temperature is 25° C. and the temperature of the heat-conducting medium stored in the heat-conducting medium storage unit 023 is 40° C., then the difference between the temperature of the heat-conducting medium stored in the heat-conducting medium storage unit and the current room temperature is 40° C.-25° C.=15° C. (15° C.<20° C.).

[0053] In an embodiment of the present invention, when the battery assembly 03 needs to be heated, such as when charging is required, in order to ensure that the battery assembly obtains the required heat to work normally, it is necessary to control the temperature of the heat conducting medium flowing through the heating device 09 and flowing into the first heat exchange structure through the fifth pipeline 11 to be lower than or equal to 70°C.

[0054] When the system is working, the fuel in the fuel storage device 01 flows into the heat supply part 021 of the heat supply device through the pipeline, contacts the catalyst in the heat supply part 021, and burns flamelessly under the catalytic action of the catalyst to provide heat, which is absorbed and accumulated by the heat pipe 022 of the heat supply device. At this time, the heat-conducting medium stored in the heat-conducting medium storage part 023 flows into the heat-conducting pipe 022 of the heat supply device through the first pipeline 06, and exchanges heat with the heat-conducting pipe 022 to obtain the heated heat-conducting medium. The heated heat-conducting medium flows out of the heat-conducting pipe 022 and enters the second pipeline 07, and flows into the second branch line 072 through the second pipeline 07, and flows into the heating device 09 through the second branch line 072. The heating device 09 can be connected to the vehicle's heating system to provide a heat source for the vehicle.

[0055] When the battery assembly 03 needs to be heated, for example, when it needs to be charged, the heat-conducting medium flowing out of the heater 09 can be regulated by the second temperature control unit to flow into the battery assembly 03 via the fifth pipeline 011, and heat exchange is performed through the first heat exchange structure in the battery assembly 03, thereby providing the required heat for the battery pack in the battery assembly. The heat-conducting medium after heat exchange can flow back to the heat-conducting medium storage unit 023 via the third pipeline 08 for recycling.

[0056] When the battery assembly 03 does not need to be heated, the heat transfer medium flowing out of the heating device 09 can be regulated by the second temperature control unit to flow back directly to the heat transfer medium storage part 023 through the fourth pipeline 010 for recycling.

[0057] When the heating device is in the start-up or stop state, the heated heat transfer medium can be controlled to flow back to the heat transfer medium storage part 023 via the first pipeline 06 and the first branch line 071 .

[0058] When the system needs to adjust the heating temperature of the heating device, the flow rate of the heated heat-conducting medium can be adjusted by adjusting the valve opening of the first branch line 071.

[0059] The following is a method for using the battery assembly heat control system provided by an embodiment of the present invention in winter or when the outdoor temperature is low, which is described in detail as follows:

[0060] In the above heat exchange process, the total energy Q of the system comes from the heat generated by the catalytic combustion of fuel methanol, which can be controlled by controlling the methanol feed rate. The system heat supply Q' is the total energy Q minus the heat loss Q of the heating device. f and heat transfer medium flow loss Q v The mass flow rate q of the second pipeline 07 and the first pipeline 06 m07 and q m06 are the total mass flow of the system, which is the mass flow of the first branch line 071 q m071 and the mass flow rate q of the second branch line 072 m072 sum.

[0061] The heat Q of the second branch 072 072 Greater than the required heat Q of the heating device 09 09 Heat demand Q of battery assembly 03 03 By adjusting the flow rate of the first branch line 071, the heat Q of the first branch line 071 can be achieved. 071 The heat Q of the second branch line 072 is adjusted by controlling 072 . Second branch line 072 heat Q 072 Provide heat for heating device 09 09 、Fifth pipeline 011 heat Q 011 And the fourth pipeline 010 heat Q 010 According to the required temperature twarm of the heating device 09, the air volume L of the heating device 09 is adjusted. 09 , adjust Q 09 . Fifth pipeline 011 heat Q 011 The heat required for the battery component 03 is Q 03 And the third pipeline 08 heat Q 08 The sum of the required heat Q 03 To maintain the battery operating temperature range t f (20℃~30℃) required heat. When the temperature of the battery component 03 is lower than 20℃, the fifth pipeline 011 is turned on. When the temperature of the battery component 03 is heated from low temperature to 25℃, the fifth pipeline 011 is turned on according to the heat dissipation Q between the battery component 03 and the room temperature. 03f Demand Adjustment m011 When the room temperature is higher than 25°C, the fifth pipeline 011 is closed. The heat of the first branch line 071, the fourth pipeline 010 and the third pipeline 08 after forced natural heat exchange by the cooling fan is Q 071 ', Q 010 ', and Q 08 '. After the three are mixed in the heat transfer medium storage unit 023, the heat of the heat transfer medium is Q023 , the temperature t of the heat transfer medium storage unit 023 023f Cannot exceed room temperature 0 +20℃. When the temperature of the heat transfer medium in the heat transfer medium storage unit 023 exceeds t 023f , the cooling fan blade speed V can be adjusted to adjust the cooling air volume L and reduce Q 071 ', Q 010 ', and Q 08 '.

[0062] When the heat control system of the battery assembly of a new energy vehicle is used in summer or in a working environment with high outdoor temperature, it is necessary to cool down the battery assembly 03. The fuel in the fuel storage device 01 is sent to the second heat exchange structure of the battery assembly 03 through the sixth pipeline 012, and the battery assembly 03 is cooled down through the second heat exchange structure distributed inside the battery assembly 03. The fuel that has absorbed the heat of the battery assembly 03 flows back to the fuel storage device 01 through the seventh pipeline 013. Among them, the sixth pipeline 012 is provided with an air cooler, which can cool down the fuel sent back to the fuel storage device 01.

[0063] The embodiment of the present invention further provides a new energy vehicle, which includes the battery assembly heat control system as described above. The new energy vehicle includes but is not limited to new energy cars, buses, trains, subways, etc.

[0064] A new energy vehicle that adopts the battery assembly heat control system provided by the embodiment of the present invention can not only save electricity consumption costs, but also significantly improve the cruising range of the vehicle.

[0065] Of course, the battery assembly heat control system provided in the embodiment of the present invention can also be used to provide heat for base station rooms, batteries, etc. in winter to ensure that the equipment is at normal operating temperature; at the same time, methanol can be used as a liquid cooling medium to cool high-temperature equipment.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery assembly heat control system, It is characterized in that include: A fuel storage device, a heating device connected to the fuel storage device, and a battery assembly; The heat supply device comprises a heat supply part, a heat pipe and a heat transfer medium storage part, wherein the heat supply part is used to catalytically burn the fuel flowing in from the fuel storage device to generate heat; the heat pipe is used to receive the heat transfer medium flowing in from the heat transfer medium storage part, and use the heat generated by the heat supply part to heat the heat transfer medium to obtain the heated heat transfer medium; When the temperature of the battery assembly is lower than a first preset threshold, the heated heat-conducting medium flows through the battery assembly to increase the temperature of the battery assembly; The heat-conducting pipe is connected to the heat-conducting medium storage part through a first pipeline, and the heat-conducting medium in the heat-conducting medium storage part flows into the heat-conducting pipe through the first pipeline; The battery assembly is provided with a first heat exchange structure, the first heat exchange structure and the heat pipe are connected by a second pipeline, and the heated heat-conducting medium flowing out of the heat-conducting pipe flows into the first heat exchange structure through the second pipeline; the first heat exchange structure is arranged at the bottom or periphery of the battery assembly, and the battery assembly is heated by the heated heat-conducting medium; A third pipeline is provided between the heat transfer medium storage part and the first heat exchange structure, and the heat transfer medium flowing out of the first heat exchange structure flows back to the heat transfer medium storage part through the third pipeline; The second pipeline is provided with a first branch line, one end of the first branch line is connected to the second pipeline, and the other end of the first branch line is connected to the heat transfer medium storage part; The first branch line is provided with a flow regulating valve, and the opening of the flow regulating valve changes with the change of the flow of the third pipeline; A warm air device is also provided between the heat supply part and the heat transfer medium storage part; The second pipeline is provided with a second branch line, one end of the second branch line is connected to the second pipeline, and the other end is connected to the heating device; The heating device is connected to the heat transfer medium storage part through a fourth pipeline; The heating device is connected to the battery assembly via a fifth pipeline; The temperature of the heat transfer medium flowing through the heating device and into the first heat exchange structure through the fifth pipeline is lower than or equal to 70° C.; The battery assembly is provided with a second heat exchange structure; The fluid inlet of the second heat exchange structure is connected to the fuel outlet of the fuel storage device through a sixth pipeline; The fluid outlet of the second heat exchange structure is connected to the fuel inlet of the fuel storage device through a seventh pipeline; When the temperature of the battery assembly is higher than a second preset threshold, the temperature of the battery assembly is reduced by the second heat exchange structure.

2. The battery assembly heat control system according to claim 1, It is characterized in that The battery assembly is provided with a first thermometer; The battery assembly heat regulation system includes a first temperature control unit, which obtains the temperature of the battery assembly through the first thermometer and sets a first flow rate flowing through the battery assembly according to a first temperature control rule and the temperature of the battery assembly.

3. The battery assembly heat control system according to claim 1, It is characterized in that The heating part is provided with a second thermometer for measuring the heating temperature of the heating component; The battery assembly heat control system includes a second temperature control unit, which sets a second flow rate of the fuel flowing into the heating part according to a second temperature control rule and the heating temperature; The heating temperature of the heating part is lower than or equal to 600°C.

4. The battery assembly heat control system according to claim 1, It is characterized in that The fuel in the fuel storage device is methanol or methanol-water solution; The heating unit is provided with a catalyst for catalyzing the combustion of methanol; The catalyst can be disposed in the following ways: disposed at the bottom of the heating portion; disposed in layers on a multi-layer perforated plate; and / or disposed by coating on the outer wall of the heat conducting pipe.

5. The battery assembly heat control system according to claim 1, It is characterized in that The first branch line, the third pipeline and the fourth pipeline are all provided with a cooling component, which is used to cool the heat-conducting medium flowing back to the heat-conducting medium storage part; the difference between the temperature of the heat-conducting medium stored in the heat-conducting medium storage part and the current room temperature is less than 20°C.

6. A new energy vehicle, It is characterized in that The new energy vehicle includes a battery assembly thermal control system as described in any one of claims 1 to 5.

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