A battery heating system

Abstract

The application relates to a battery heating system, which comprises a sealed box body used for containing a battery, a heating device, one side of the heating device being communicated with an air inlet of the box body, the other side of the heating device being used for being communicated with an oil tank of a vehicle, and a ignition device being arranged in the heating device. The battery heating system can generate high-temperature gas by burning fuel oil to heat the battery, so that the temperature of the battery is raised under cold working conditions, and the normal use of the battery under cold environment is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile technology, in particular to a battery heating system. BACKGROUND

[0002] At present, a battery is usually arranged in a vehicle. When the engine is started or runs at low speed, the power required by the starter, ignition system and electrical equipment in the vehicle is supplied by the battery, because the automobile generator does not generate electricity or the voltage is very low. When the engine normally operates, the generator supplies power to the electrical equipment in the vehicle and charges the battery at the same time. When the power consumption of the electrical equipment in the vehicle is too large and exceeds the power supply capacity of the generator, the battery and the generator jointly supply power to the electrical equipment in the vehicle. At the same time, the battery is also a large-capacity capacitor that can absorb the instantaneous high voltage generated in the circuit in the vehicle, thereby protecting the electrical equipment in the vehicle.

[0003] In the related art, in order to install the battery on the vehicle, the battery is usually fixed by a battery frame.

[0004] However, the vehicle sometimes travels in a low-temperature cold environment. In the low-temperature environment, the charging and discharging efficiency of the battery is low, which leads to a significant reduction in the continuous working time of the battery, affects the service life of the battery, and reduces customer satisfaction. SUMMARY

[0005] Embodiments of the present application provide a battery heating system to solve the problems of difficult charging and discharging of the battery in a low-temperature environment in the related art, and short discharging time and short battery life after charging.

[0006] In a first aspect, a battery heating system is provided, which includes: a box body arranged in a sealed manner, the box body being used to accommodate a battery; a heating device, one side of the heating device being in communication with an air inlet of the box body, the other side of the heating device being used to communicate with an oil tank of a vehicle, and the heating device being provided with an ignition device inside. Since the heating device is in communication with the oil tank of the vehicle, the fuel of the vehicle can be delivered to the heating device. The fuel in the heating device can be ignited by the ignition device in the heating device to form high-temperature gas. The high-temperature gas can be guided to the box body for installing the battery through the air inlet connected with the heating device. The high-temperature gas can increase the temperature in the box body through the box body arranged in a sealed manner, thereby heating the battery. The battery can be kept at a good working temperature in a cold environment, so that the vehicle can be started by the battery under cold working conditions. Therefore, the battery can be heated by burning fuel to generate high-temperature gas, so as to increase the temperature of the battery under cold working conditions and ensure the normal use of the battery in a cold environment.

[0007] In some embodiments, the air inlet of the box is provided with a first temperature sensor, and the air outlet of the box is provided with a second temperature sensor; when the first temperature sensor measures a temperature lower than a first preset temperature, the oil tank supplies oil to the heating device, and the ignition device ignites the fuel in the heating device; when the second temperature sensor measures a temperature higher than or equal to a second preset temperature, the oil tank stops supplying oil to the heating device, wherein the second preset temperature is higher than or equal to the first preset temperature.

[0008] In some embodiments, the box is provided with a flow guide frame, the flow guide frame surrounds a mounting area for mounting a battery, and an air flow channel is formed between the flow guide frame and the side wall of the box, and the air flow channel is in communication with the air inlet.

[0009] In some embodiments, the air flow channel includes a first air channel and a plurality of second air channels, the first air channel is wider than the second air channel; wherein the air inlet is in communication with the first air channel, and the air outlet of the box is in communication with one of the second air channels.

[0010] In some embodiments, the mounting area includes a plurality of fixed areas arranged at intervals, each of the fixed areas is used for mounting a battery, and a third air channel is arranged between two adjacent fixed areas, and the third air channel is in communication with the air flow channel.

[0011] In some embodiments, the fixed areas are arranged at intervals along the direction in which the first air channel extends, and the third air channel is in communication with the first air channel.

[0012] In some embodiments, a baffle is arranged between the third air channel and the second air channel, and the baffle is located on the side of the third air channel away from the first air channel.

[0013] In some embodiments, the box is provided with an air outlet with a flow resistance higher than that of the air inlet.

[0014] In some embodiments, the box includes a bottom cover and a top cover, and the top cover is detachably buckled to the bottom cover through a buckle.

[0015] In some embodiments, the top of the side wall of the bottom cover is provided with a first flange, and when the top cover is buckled to the bottom cover, the top cover is pressed and held on the first flange, and thermal insulation cotton is arranged between the first flange and the top cover.

[0016] The technical scheme provided by the application has the following beneficial effects:

[0017] This invention provides a battery heating system. Since the heating device is connected to the vehicle's fuel tank, fuel can be supplied to the heating device. An ignition device within the heating device ignites the fuel, generating high-temperature gas. This high-temperature gas is then introduced into the battery housing via an air inlet connected to the heating device. The sealed housing allows the high-temperature gas to raise the temperature inside the housing, thereby heating the battery and maintaining it at a suitable operating temperature in cold environments. This allows the vehicle to start in cold conditions using the battery. Therefore, by burning fuel to generate high-temperature gas to heat the battery, the battery temperature can be increased in cold conditions, ensuring normal battery operation in cold environments. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of a battery heating system provided in an embodiment of the present invention;

[0020] Figure 2 This is an exploded structural diagram of a battery heating system provided in an embodiment of the present invention;

[0021] Figure 3 This is a top view of a battery heating system provided in an embodiment of the present invention;

[0022] Figure 4 This is a three-dimensional structural diagram of the internal structure of a battery heating system provided in an embodiment of the present invention.

[0023] In the picture:

[0024] 1. Box body;

[0025] 11. Bottom cover; 111. First flange;

[0026] 12. Top cover;

[0027] 13. Air inlet; 14. Air outlet;

[0028] 15. Flow guide frame; 151. Flow guide plate; 152. Ventilation slot;

[0029] 16. Airflow channel; 161. First airflow channel; 162. Second airflow channel; 163. Third airflow channel;

[0030] 17. Baffle;

[0031] 18, partition; 181, through hole;

[0032] 19, mounting area; 191, fixing area;

[0033] 2, heating device;

[0034] 3, buckle; 31, buckle hook; 32, buckle hoop;

[0035] 4, thermal insulation cotton;

[0036] 5, pressing plate;

[0037] 9, battery. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0039] The embodiments of the present application provide a battery heating system, which can solve the problem that in the related art, a vehicle is difficult to start under a low-temperature environment, which seriously affects the use of the vehicle. For example, when the vehicle travels in a cold working condition at-41 degrees, the discharge time of the battery is about 4 hours, which is much less than the normal discharge time. Moreover, the charging frequency of the battery in a low-temperature environment is also greatly increased, and in a serious case, the charging frequency of the battery in the same time can even reach about twice the normal charging frequency, that is, the service life of the battery is reduced to about half of the normal life.

[0040] Referring to Figure 1 and Figure 2As shown, the battery heating system provided by the embodiment of the application can include: a sealed box 1 for accommodating the battery 9; a heating device 2, one side of the heating device 2 is communicated with the air inlet 13 of the box 1, the other side of the heating device 2 is used for being communicated with the oil tank of the vehicle, and the heating device 2 is provided with an ignition device. The battery is stored in the sealed box 1, the sealed box 1 can not only improve the heat preservation effect of the battery 9, but also can avoid the water vapor entering the inside of the box 1, thereby causing the corrosion and damage of the electrical components in the inside of the box 1. Since the heating device 2 is communicated with the oil tank, the fuel can be transported to the heating device 2 through the oil tank, the ignition device in the heating device 2 ignites the fuel to heat the air to form high-temperature gas. Since the heating device 2 is communicated with the air inlet 13 of the box 1, the high-temperature gas can be guided to the inside of the box 1 through the air inlet 13 to heat the battery 9 in the inside of the box 1, so as to ensure that the battery 9 is in the normal working temperature. By sealing the box 1, the leakage of the high-temperature gas can be avoided, so that the high-temperature gas can fully contact with the battery 9, and the heating effect of the battery 9 can be ensured. By igniting the fuel to heat the battery 9, the heating power can be controlled by adjusting the delivery amount of the fuel, so as to realize the controllable heating process. Compared with the heating by the electric energy, the stability of the fuel heating is higher, and the electric energy of the vehicle is not consumed, which is suitable for the vehicle driving in the cold environment for a long time. The atomizing device can be arranged between the heating device 2 and the oil tank of the vehicle, and the fuel can be atomized by the atomizing device to improve the combustion efficiency. In the embodiment, the heat preservation layer is arranged on the inner wall of the box 1 to reduce the heat exchange between the high-temperature gas and the outside, and improve the heating effect of the battery 9. The heat preservation layer can be an aluminum foil heat preservation layer, the aluminum foil is wrapped outside the heat preservation cotton, the silver surface of the aluminum foil can block the heat radiation, and the outside medium can conduct heat on the surface of the aluminum foil without heat exchange in the inside of the aluminum foil. The heat preservation effect of the heat preservation material in the inside of the aluminum foil is improved. In the embodiment, the ignition device is an electromagnetic induction electronic ignition device, which can automatically ignite when the fuel is sensed. In the embodiment, the battery frame side plate is fixedly connected to the outside of the box 1, and the box 1 is fixed on the vehicle through the battery frame side plate. The battery frame side plate can be formed by casting to improve the connection strength between the box 1 and the vehicle. In the embodiment, the high-temperature gas fills the cavity inside the box 1 to heat the surfaces of the battery 9, and in other embodiments, a pipeline can be arranged in the inside of the box 1, and the high-temperature gas extends through the pipeline to surround the inside of the battery 9. Then the surfaces of the battery 9 are heated. The high-temperature gas can form a more sealed structure by guiding the high-temperature gas through the pipeline to heat the battery 9, and the high-temperature gas is easy to guide. In the embodiment, the high-temperature gas fills the entire inside of the box 1, so that the contact area between the high-temperature gas and the battery 9 is larger, and the heat transfer effect is improved.

[0041] Preferably, in some optional embodiments, the air inlet 13 of the box 1 is provided with a first temperature sensor, and the air outlet 14 of the box 1 is provided with a second temperature sensor; when the first temperature sensor measures a temperature lower than a first preset temperature, the oil tank supplies oil to the heating device 2, and the ignition device ignites the fuel in the heating device 2; when the second temperature sensor measures a temperature higher than or equal to a second preset temperature, the oil tank stops supplying oil to the heating device 2, wherein the second preset temperature is higher than or equal to the first preset temperature.

[0042] That is, the temperature inside the box 1 is measured by two temperature sensors. When the temperature is too low, below the first preset temperature, the oil tank of the vehicle supplies fuel to the heating device 2, and the ignition device starts to ignite the fuel to form high-temperature gas. When the temperature inside the box 1 is higher than the second preset temperature, the supply of fuel to the heating device 2 is stopped, and the heating inside the box 1 is stopped. The temperature inside the box 1 is maintained between the first preset temperature and the second preset temperature; wherein the second preset temperature can be equal to the first preset temperature, so that the temperature inside the box 1 is maintained at a fixed temperature. The second preset temperature can also be set higher than the first preset temperature, so that when the temperature exceeds the first preset temperature, the heating continues, and the temperature inside the box 1 continues to rise, avoiding frequent start of the heating device 2 and prolonging the service life of the heating device 2. The fuel in the oil tank can be pumped by a pump in the heating device 2, or a flow valve can be provided between the oil tank and the heating device 2 to control the amount of fuel supplied to the heating device 2 by the opening and closing of the flow valve.

[0043] In this embodiment, since the air inlet 13 is closest to the heating device 2, the temperature of the air inlet 13 should be the highest temperature inside the box 1. The first temperature sensor that controls the start of the heating device 2 is arranged at the air inlet 13 of the box 1. If the temperature at the air inlet 13 is lower than the first preset temperature, it generally indicates that the temperature in each region inside the box 1 is lower than the first preset temperature. The maximum degree of guarantee that the inside of the box 1 is below the first preset temperature before heating can reduce fuel consumption, and can avoid frequent start of the heating device 2 and cause the temperature of the air inlet 13 to be too high. Since the air outlet 14 is the position where the high-temperature gas is discharged from the box 1, the air outlet 14 is generally the lowest temperature region inside the box 1. By controlling the stop of the heating device 2 by the temperature of the lowest temperature region, the maximum degree of guarantee that the inside of the box 1 is above the second preset temperature when the heating is stopped can make the heating effect of the battery 9 meet the expected demand. The box 1 and the heating device 2 are connected by a pipeline, a valve body can be arranged in the pipeline, and the valve body is opened after the fuel in the heating device 2 is completely burned, to avoid the contact between the open flame and the surface of the battery 9.

[0044] In this embodiment, the vehicle terminal can control whether the fuel tank delivers fuel to the heating device 2, and the vehicle terminal can adjust the first preset temperature and the second preset temperature. The temperature display device and the controller can be arranged inside the cab to facilitate the driver to monitor and adjust the temperature of the battery 9 in real time inside the cab. As shown by the formula Q=mq, the more fuel, the more heat generated, where Q represents heat, m represents the mass of fuel (kg); according to Q=Cm△t, when the mass of the object to be heated and the specific heat capacity are constant, the more heat, the more the temperature of the object to be heated rises, where Q represents heat, m represents the mass of the object (kg), and△t represents the temperature change; that is, the more fuel burned, the more the temperature of the battery 9 rises. During the heating process, the temperature rising speed of the battery 9 can be controlled by controlling the speed of fuel supply. Or by controlling the flow of high-temperature gas from the heating device 2 to the air inlet 13, the temperature rising speed of the battery 9 can be controlled. The mobile terminal such as a mobile phone and the vehicle terminal can be wirelessly connected by Bluetooth, Wi-Fi, and other wireless transmission methods, and the remote control of the battery heating system can be realized.

[0045] Referring to Figures 1 to 3 As shown in some optional embodiments, the box 1 is provided with a flow guide frame 15, the flow guide frame 15 surrounds the mounting area 19 for mounting the battery, and the flow guide frame 15 and the side wall of the box 1 form an air flow channel 16, which is in communication with the air inlet 13. The flow guide frame 15 can be made of metal or plastic. Here, the material of the flow guide frame 15 is not limited as long as it can fix the battery 9.

[0046] That is, the movement of the battery 9 is limited by the mounting area 19 surrounded by the flow guide frame 15. The arrow direction indicates the flow direction of the high-temperature gas. In this embodiment, the flow guide frame 15 is composed of a flow guide plate 151 and a plurality of limiting blocks arranged at intervals. In other embodiments, the flow guide frame 15 can also be an integrally formed frame structure. The air flow channel 16 is formed between the flow guide frame 15 and the side wall of the box 1, and the air flow channel 16 is in communication with the air inlet 13. The high-temperature gas generated by the heating device 2 can flow along the air flow channel 16, achieving the heating of the side wall of the box 1, isolating the battery 9 from the low-temperature inner wall of the box, and avoiding the heat exchange between the battery 9 and the outside environment through the inner wall of the box 1. The heating effect of the battery 9 is improved. In this embodiment, the flow guide frame 15 and the top of the box 1 also have gaps, and the battery 9 is held by the pressing plate 5, and the pressing plate 5 and the top of the box 1 also have gaps. The high-temperature gas can be distributed on the top of the battery 9, avoiding the heat exchange between the battery 9 and the cold environment through the contact with the upper wall of the box 1.

[0047] Referring to Figures 1 to 4 As shown in some optional embodiments, the airflow passage 16 includes a first airflow passage 161 and a plurality of second airflow passages 162, the first airflow passage 161 is wider than the second airflow passages 162; wherein the air inlet 13 is in communication with the first airflow passage 161, and the air outlet 14 of the box 1 is in communication with one of the second airflow passages 162.

[0048] That is, by communicating with the air inlet 13 through the wider first airflow passage 161 and by communicating with the air outlet 14 through the narrower second airflow passage 162, the air flow resistance of the air inlet 13 can be small and the air flow resistance of the air outlet 14 can be large, which can prolong the residence of the high-temperature gas entering the box 1 from the air inlet 13 in the box 1 for a longer time. In the case of consuming a unit volume of fuel, the effect of increasing the temperature of the battery 9 is improved. In the present embodiment, the air outlet 14 is used to be opposite to the side wall of the battery 9 and perpendicular to the flow direction of the high-temperature airflow, which can further improve the flow resistance of the high-temperature gas. The extension direction of the air inlet 13 is the same as that of the first airflow passage 161, so that the high-temperature airflow can smoothly flow to the first airflow passage 161.

[0049] Referring to Figure 2 and Figure 3 As shown in some optional embodiments, the mounting area 19 includes a plurality of fixed areas 191 arranged at intervals, each of the fixed areas 191 is used for mounting one battery 9, and a third airflow passage 163 is arranged between two adjacent fixed areas 191, the third airflow passage 163 is in communication with the airflow passage 16. In the present embodiment, the battery 9 is fixed by the limiting block and spaced apart, the third airflow passage 163 is formed between two adjacent batteries 9, and the high-temperature gas can be guided to flow to the gap between the two batteries 9 by communicating the third airflow passage 163 with the airflow passage 16. The side walls of the batteries 9 close to each other are heated. Each battery 9 can be heated by the high-temperature gas. In the present embodiment, the mounting area 19 is provided with two fixed areas 191 arranged at intervals, and in other embodiments, the mounting area 19 can form more fixed areas 191 arranged at intervals by the limiting block. In the present embodiment, the batteries 9 are arranged in longitudinal rows under the spacing of the flow guide frame 15, and in other embodiments, the batteries 9 can also be arranged in a square matrix under the spacing of the flow guide frame 15, forming a staggered arrangement of rows and columns, or can be arranged in a divergent point shape. Or it can form a stacked arrangement. The third airflow passage 163 is formed between the lower battery 9 and the upper battery 9, and the upper and lower spaced batteries 9 are heated. The limiting block for dividing the battery 9 can be provided as a detachable structure, and by mounting the limiting block at different positions of the box 1, different shapes of the fixed area 191 can be formed to satisfy the installation of batteries 9 of different shapes. The use range of the battery heating system is expanded.

[0050] Referring toFigure 2 and Figure 3 As shown in FIG. 11, in some alternative embodiments, the fixing area 191 is arranged in a spaced-apart manner along the extending direction of the first air passage 161, and the third air passage 163 is in communication with the first air passage 161. In this embodiment, the spacing block is arranged inside the flow guide frame 15 to store the battery 9, and then the first air passage 161 is formed in a spaced-apart manner along the extending direction of the first air passage 161, so as to arrange the battery 9 along the extending direction of the first air passage 161. In this way, each third air passage 163 can be in communication with the first air passage 161 with a larger air volume. The heating effect on the battery 9 is improved. In this embodiment, the air passage groove 152 is arranged on the flow guide plate 151 arranged on the side of the first air passage 161 close to the mounting area 19, and is used to guide the gas in the first air passage 161 to the third air passage 163. In this embodiment, the flow guide plate 151 is arranged in an arc shape, and the center of the arc of the flow guide plate 151 is deviated to the side of the flow guide plate 151 away from the mounting area 19.

[0051] Referring to Figures 1 to 4 As shown in FIG. 11, in some alternative embodiments, the third air passage 163 is provided with a baffle plate 17 between the second air passage 162 and the third air passage 163, and the baffle plate 17 is located on the side of the third air passage 163 away from the first air passage 161. That is, the baffle plate 17 arranged between the second air passage 162 and the third air passage 163 can avoid the interference between the gas flow in the second air passage 162 and the gas flow in the third air passage 163, so as to affect the gas circulation in the box body 1. In this embodiment, the partition plate 18 extending along the extending direction of the third air passage 163 is arranged in the third air passage 163, one end of the partition plate 18 extends out of the air passage groove 152 of the flow guide plate 151, and the other end of the partition plate 18 is spaced apart from the baffle plate 17. In this way, the high-temperature gas in the first air passage 161 is guided to the side of the partition plate 18 close to the air inlet 13 in the third air passage 163, and then the gas flow on the side of the partition plate 18 close to the air inlet 13 is guided to the side of the partition plate 18 away from the air inlet 13 and finally to the first air passage 161 through the gap between the partition plate 18 and the baffle plate 17. By guiding the flow direction of the high-temperature gas through the partition plate 18, the backflow of the gas after impacting the baffle plate 17 and the gas flowing towards the baffle plate 17 are prevented from forming a turbulent flow, so as to make the heat distribution in the box body 1 uneven. In this embodiment, the side of the partition plate 18 extending into the first air passage 161 is provided with a through hole 181, and the gas in the first air passage 161 can flow through the through hole 181 along the extending direction of the first air passage 161.

[0052] Referring to Figure 4As shown, in some optional embodiments, the housing 1 has an outlet 14 with a higher flow resistance than the inlet 13. That is, by setting the flow resistance of the outlet 14 to be higher than that of the inlet 13, the velocity of the gas flowing out of the housing 1 can be reduced, extending the residence time of the high-temperature gas and improving the heating efficiency of the battery 9. In this embodiment, the outlet 14 is configured with honeycomb holes to increase the flow resistance. In other embodiments, the outlet 14 can also be configured with a multi-layered, staggered perforated structure, or with a multi-turn channel to increase the flow resistance.

[0053] See Figure 1 and Figure 1 As shown, in some optional embodiments, the housing 1 includes a bottom cover 11 and a top cover 12, with the top cover 12 detachably fastened to the bottom cover 11 via a fastening member 3. That is, by connecting the bottom cover 11 and the top cover 12 via the fastening member 3, the housing 1 is sealed, achieving a reusable assembly and disassembly effect, facilitating the installation and replacement of the battery 9. In this embodiment, the fastening member 3 includes a clamp 32 and a hook 31. The clamp 32 is fixed to the bottom cover 11, and the hook 31 is fixed to the top cover 12. During fastening, rotating the clamp 32 tightens it onto the hook 31, ensuring a tight fit between the top cover 12 and the bottom cover 11.

[0054] In other embodiments, the buckle 32 can be disposed on the top cover 12, and the hook 31 can be disposed on the bottom cover 11. In this embodiment, the top surface and one side of the bottom cover 11 are both open. By fastening the L-shaped top cover 12 onto the bottom cover 11, the top surface and side of the bottom cover 11 are completely closed. By making two surfaces of the bottom cover 11 open to the outside, the installation of the battery 9 is facilitated. In other embodiments, the bottom cover 11 can also be configured as a structure with only the top open. In other embodiments, the top cover 12 can be detachably installed onto the bottom cover 11 by plugging it in. For example, a snap-fit ​​groove can be provided on the top cover 12, and a snap-fit ​​body matching the snap-fit ​​groove can be provided on the top of the bottom cover 11. By snapping the snap-fit ​​body into the snap-fit ​​groove, the installation of the top cover 12 and the bottom cover 11 is achieved.

[0055] See Figures 1 to 3As shown, in some alternative embodiments, the top of the side wall of the bottom cover 11 is provided with a first flange 111; when the top cover 12 is buckled to the bottom cover 11, the top cover 12 is pressed on the first flange 111, and the first flange 111 and the top cover 12 are clamped with the thermal insulation cotton 4. That is, by pressing the top cover 12 on the first flange 111 of the bottom cover 11 instead of the top end surface of the side edge of the bottom cover 11, the contact area of the top cover 12 and the bottom cover 11 is increased by the flange structure. The sealing effect between the bottom cover 11 and the top cover 12 is improved. By clamping the thermal insulation cotton 4 between the bottom cover 11 and the top cover 12, the thermal insulation cotton 4 can be used to seal the joint between the top cover 12 and the bottom cover 11, and the thermal insulation effect is improved. At the same time, the top cover 12 and the bottom cover 11 can be pressed better by the deformation of the thermal insulation cotton 4. In this embodiment, the thermal insulation cotton 4 is formed by PP (polypropylene) material and EPDM (Ethylene Propylene Diene Monomer) material, and is tightly attached to the top of the bottom cover 11 by a pressing process. In other embodiments, the thermal insulation cotton 4 can also be made of other thermal insulation materials, or a vacuum thermal insulation layer or other structure can be formed to form a thermal insulation layer. The material of the thermal insulation cotton 4 is not limited here, as long as the desired thermal insulation effect can be achieved. In this embodiment, the thermal insulation structure is also provided on the inner side of the side wall of the bottom cover 11 to insulate the box 1.

[0056] The principle of the battery heating system provided by the embodiment of the present application is as follows:

[0057] The fuel input from the fuel tank is ignited by the heating device 2 to form high-temperature gas, and the high-temperature gas in the heating device 2 enters the inside of the box 1 through the air inlet 13 of the box 1 to heat the battery 9 inside the box 1. The battery of the vehicle driving in cold conditions can still be at a normal use temperature, avoiding the shortening of the discharge time caused by the too low temperature of the battery 9, and improving the user satisfaction. Moreover, since the battery 9 is heated by fuel, the heating rate of the battery 9 can be controlled by controlling the fuel supply amount. The temperature of the heating process is controllable. Moreover, compared with electric heating, fuel heating is more stable and suitable for use in cold conditions.

[0058] In the description of the present application, it should be noted that the terms "upper", "lower", and the like are used for indicating the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] It should be noted that in the present application, relational terms such as "first" and "second" and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or other elements inherent in such a process, method, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or apparatus including the element.

[0060] The above is only a specific embodiment of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A battery heating system, characterized in that, It includes: A sealed enclosure (1) is provided for housing a storage battery (9). A heating device (2) is provided. One side of the heating device (2) is connected to the air inlet (13) of the box (1), and the other side of the heating device (2) is connected to the fuel tank of the car. An ignition device is provided inside the heating device (2). The housing (1) is provided with a guide frame (15), which forms an installation area (19) for installing batteries. An airflow channel (16) is formed between the guide frame (15) and the side wall of the housing (1), and the airflow channel (16) is connected to the air inlet (13). The airflow channel (16) includes a first air channel (161) and a plurality of second air channels (162), wherein the first air channel (161) is wider than the second air channels (162). The air inlet (13) is connected to the first air passage (161), and the air outlet (14) of the housing (1) is connected to one of the second air passages (162). The installation area (19) includes spaced fixed areas (191), each fixed area (191) is used to install a battery (9), and a third air passage (163) is provided between two adjacent fixed areas (191), the third air passage (163) is connected to the airflow passage (16); a baffle (17) is provided between the third air passage (163) and the second air passage (162), the baffle (17) is located on the side of the third air passage (163) away from the first air passage (161).

2. The battery heating system as described in claim 1, characterized in that: The air inlet (13) of the box (1) is equipped with a first temperature sensor, and the air outlet (14) of the box (1) is equipped with a second temperature sensor. When the temperature measured by the first temperature sensor is lower than the first preset temperature, the oil tank supplies oil to the heating device (2), and the ignition device ignites the fuel in the heating device (2); When the second temperature sensor detects a temperature higher than or equal to a second preset temperature, the oil tank stops supplying oil to the heating device (2), wherein the second preset temperature is higher than or equal to the first preset temperature.

3. The battery heating system as described in claim 1, characterized in that: The fixed area (191) is arranged at intervals along the direction of the first air passage (161), and the third air passage (163) is connected to the first air passage (161).

4. The battery heating system as described in claim 1, characterized in that: The housing (1) is provided with an outlet (14) with a flow resistance higher than that of the inlet (13).

5. The battery heating system as described in claim 1, characterized in that: The housing (1) includes a bottom cover (11) and a top cover (12), the top cover (12) being detachably fastened to the bottom cover (11) by means of fasteners (3).

6. The battery heating system as described in claim 5, characterized in that: The top of the side wall of the bottom cover (11) is provided with a first flange (111). When the top cover (12) is fastened to the bottom cover (11), the top cover (12) is pressed against the first flange (111), and thermal insulation cotton (4) is sandwiched between the first flange (111) and the top cover (12).

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