Tray of battery pack, battery pack and hybrid vehicle

Abstract

The invention discloses a tray of a battery pack, the battery pack and a hybrid electric vehicle, and relates to the field of batteries. The tray comprises a bottom plate structure and a frame arranged on the bottom plate structure. A battery cell mounting cavity is defined between the frame and the bottom plate structure; wherein at least one of the bottom plate structure and the frame is internally provided with an exhaust channel, and the tray is provided with an air inlet and an air outlet which are communicated with the exhaust channel. According to the tray of the battery pack provided by the embodiment of the invention, the internal structure is optimized, the exhaust system is integrated, and efficient heat energy management is realized, so that the performance and the safety performance of the battery pack are improved.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a battery pack tray, a battery pack and a hybrid vehicle. Background Art

[0002] In some existing hybrid vehicles, the exhaust pipe has the problem of occupying the space of the battery pack. This problem becomes more prominent as the pure electric mileage increases and the battery pack capacity needs to be further increased.

[0003] Therefore, there is room for improvement in the battery pack. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the first aspect of the present invention is to provide a battery pack tray, which improves the performance and safety of the battery pack by optimizing the internal structure, integrating the exhaust system, and realizing efficient thermal energy management.

[0005] A second aspect of the present invention is to provide a battery pack.

[0006] A third aspect of the present invention aims to provide a hybrid vehicle.

[0007] The tray of the battery pack according to the first embodiment of the present invention comprises a bottom plate structure and a frame arranged on the bottom plate structure. A battery cell installation cavity is enclosed between the frame and the bottom plate structure; wherein at least one of the bottom plate structure and the frame is provided with an exhaust channel, and the tray is provided with an air inlet and an air outlet connected to the exhaust channel.

[0008] According to the tray of the battery pack of the embodiment of the present invention, a base plate structure and a frame are provided, and the frame and the base plate structure are closely matched to jointly enclose a cell installation cavity for installing the battery cells, thereby ensuring the stable installation of the battery cells and providing necessary space for exhaust gas treatment.

[0009] By setting an exhaust channel in at least one of the bottom plate structure and / or the frame, the exhaust system is integrated into the battery pack tray structure, effectively reducing the space required for the additional installation of the exhaust pipe inside the vehicle, making the vehicle layout more compact and efficient.

[0010] According to the tray of the battery pack of some embodiments of the present invention, a liquid cooling channel arranged adjacent to the exhaust channel is further provided in the tray; when the exhaust channel is provided in the base plate structure, the liquid cooling channel includes a first liquid cooling channel provided in the base plate structure; when the exhaust channel is provided in the frame, the liquid cooling channel includes a second liquid cooling channel provided in the frame.

[0011] According to the tray of the battery pack of some embodiments of the present invention, the liquid cooling channel includes the second liquid cooling channel disposed in the frame, and the second liquid cooling channel is disposed on a side of the exhaust channel adjacent to the battery cell mounting cavity.

[0012] In some optional embodiments, the tray also includes: a temperature detection component arranged in the tray; a cooling pump, the cooling pump is used to inject coolant into the liquid cooling channel, or to drive the coolant to flow in the liquid cooling channel, the cooling pump is electrically connected to the temperature detection component to operate according to the detection result of the temperature detection component.

[0013] In some optional embodiments, partition ribs are provided in the liquid cooling channel, and the partition ribs extend along the flow direction of the coolant in the liquid cooling channel to separate the single liquid cooling channel into at least two sub-cooling channels.

[0014] In some optional embodiments, the flow direction of the coolant in the liquid cooling channel is opposite to that of the exhaust gas in the adjacent exhaust channel.

[0015] In some optional embodiments, it also includes: a thermoelectric conversion device, at least one receiving end of the thermoelectric conversion device is arranged in the exhaust channel, or is arranged on the bottom plate structure provided with the exhaust channel, or is arranged on the frame provided with the exhaust channel.

[0016] Optionally, at least one receiving end of the thermoelectric conversion device is in a sheet shape and is disposed on the inner wall surface of the exhaust passage.

[0017] According to the tray of the battery pack of some embodiments of the present invention, reinforcing ribs are provided in the exhaust channel, and the reinforcing ribs extend along the flow direction of the exhaust gas in the exhaust channel to separate the single exhaust channel into at least two sub-exhaust channels.

[0018] In some optional embodiments, at least one of the reinforcing ribs is provided with a first slot to connect two adjacent air passages.

[0019] According to the tray of the battery pack of some embodiments of the present invention, the frame includes: two side beams, each of which extends along a first direction, and the two side beams are arranged at intervals along a second direction; a longitudinal beam, which extends along the first direction and is located between the two side beams; the exhaust channel includes a first channel, and the first channel is arranged in at least one of the side beams and the longitudinal beams.

[0020] Optionally, there are at least two first channels, and the tray further includes: a multi-way tube, which is arranged at at least one end of the frame; when the multi-way tube is arranged at one end of the frame, one pipe opening of the multi-way tube is an inlet, and the remaining pipe openings of the multi-way tube are respectively connected to each of the first channels; when the multi-way tube is arranged at the other end of the frame, one pipe opening of the multi-way tube is an outlet, and the remaining pipe openings of the multi-way tube are respectively connected to each of the first channels.

[0021] In some optional embodiments, the bottom plate structure includes: a liquid cooling plate, which is used to cooperate with the side beam and the longitudinal beam to enclose the battery cell installation cavity, and the liquid cooling plate defines a bottom liquid channel for heat exchange with the battery cell; a bottom guard plate, which is located on the side of the liquid cooling plate away from the battery cell installation cavity; the exhaust channel includes a second channel, and the second channel is arranged between the liquid cooling plate and the bottom guard plate.

[0022] In some optional embodiments, a liquid cooling plate is connected between each of the side beams and the longitudinal beam, and a second slot is formed between the two liquid cooling plates; the first channel is provided in the longitudinal beam, and the first channel in the longitudinal beam is connected to the second channel through the second slot.

[0023] In some optional embodiments, the bottom guard plate is detachably disposed on the tray.

[0024] According to the battery pack tray of some embodiments of the present invention, the sum of the cross-sectional areas of all the exhaust channels is S, and satisfies

[0025] The battery pack tray according to some embodiments of the present invention further includes: a switch valve provided on at least one exhaust channel.

[0026] A battery pack according to an embodiment of a second aspect of the present invention comprises the tray of the battery pack according to the embodiment of the first aspect of the present invention, and further comprises a battery cell disposed in the battery cell installation cavity.

[0027] According to a third aspect of the present invention, a hybrid vehicle comprises: a vehicle body, a battery pack and an engine. The battery pack is arranged on the vehicle body, and the battery pack is the battery pack according to the second aspect of the present invention; the engine is arranged on the vehicle body, and the exhaust port of the engine is connected to the air inlet of the tray of the battery pack.

[0028] In some optional embodiments, the hybrid vehicle further includes: a muffler connected to the air outlet of the tray of the battery pack.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 It is a schematic diagram of the structure of the tray in some embodiments of the present invention;

[0032] Figure 2 An exploded view of a tray according to some embodiments of the present invention;

[0033] Figure 3 It is a cross-sectional view of a longitudinal beam in some embodiments of the present invention;

[0034] Figure 4 sectional views of side beams of some embodiments of the present invention;

[0035] Figure 5 Schematic diagram of the positions of multi-way pipes in some embodiments of the present invention;

[0036] Figure 6 Schematic diagram of the position of the bottom guard plate of some embodiments of the present invention.

[0037] Reference numerals:

[0038] Tray 100, battery cell installation cavity 101, air inlet 102, air outlet 103,

[0039] Bottom plate structure 10, liquid cooling plate 11, bottom liquid channel 111, bottom guard plate 12,

[0040] Frame 30, side beam 31, longitudinal beam 32, second slot 321,

[0041] Exhaust channel 40, air distribution channel 401, first channel 41, second channel 42, reinforcing rib 43, first slot 44, liquid cooling channel 50, sub-cooling channel 500, first liquid cooling channel 501, second liquid cooling channel 502, partition rib 53,

[0042] Thermoelectric conversion device 60, receiving end 61,

[0043] Multi-way pipe 70, pipe opening 71, inlet 72. DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0045] In the description of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] Reference below Figure 1-Figure 6 A tray 100 for a battery pack according to an embodiment of the first aspect of the present invention is described.

[0048] The tray 100 of the battery pack according to the embodiment of the present invention comprises: a bottom plate structure 10 and a frame 30 disposed on the bottom plate structure 10. A battery cell installation cavity 101 is enclosed between the frame 30 and the bottom plate structure 10. An exhaust channel 40 is disposed in at least one of the bottom plate structure 10 and the frame 30, and an air inlet 102 and an air outlet 103 connected to the exhaust channel 40 are disposed on the tray 100.

[0049] The tray 100 is combined with the bottom plate structure 10 and the frame 30 to form a battery cell installation cavity 101 for accommodating and fixing the battery cells in the battery pack to ensure the stability and safety of the battery cells.

[0050] As mentioned in the background art, the space occupation problem of the exhaust pipe is an urgent problem to be solved in the design of hybrid electric vehicles.

[0051] To this end, the tray 100 of the battery pack according to the embodiment of the present invention integrates the exhaust space into the structure of the tray 100 .

[0052] In the above technical solution, the tray 100 not only serves as a supporting and fixing structure for the battery cells, but also serves as an exhaust pipe. Figure 3 It can be seen that integrating the exhaust channel 40 into the tray 100 structure can effectively reduce or even avoid the problem of the exhaust pipe directly occupying the valuable space of the battery pack on the chassis in the traditional layout, thereby optimizing the space utilization in the vehicle.

[0053] Specifically, the tray 100 of the battery pack of the present invention is provided with exhaust channels 40 outside the battery cell installation cavity 101 enclosed between the bottom plate structure 10 and the frame 30. These exhaust channels 40 are independent of the battery cell installation cavity 101, ensuring that the exhaust gas can be smoothly discharged from the inside of the battery pack without affecting the safety and performance of the battery cell.

[0054] By setting the exhaust channel 40 in the tray 100, the space layout inside the vehicle can be optimized, so that the space inside the vehicle can be used more reasonably, and it also creates favorable conditions for increasing the capacity of the battery pack. As the battery capacity increases, the pure electric range of the vehicle will also be improved accordingly, thereby better meeting the user's needs for long range and low energy consumption.

[0055] Optionally, the bottom plate structure 10 and the frame 30 are made of high-strength, corrosion-resistant materials, which can ensure that the pallet 100 maintains a stable structure and performance during long-term use.

[0056] In some optional embodiments, an exhaust channel 40 is provided in the bottom plate structure 10. This is because the bottom plate structure 10 of the battery pack has a large plane area, and this feature can provide a larger space to integrate the exhaust system. By setting the exhaust channel 40 inside the bottom plate structure 10, the valuable space under the battery pack can be fully utilized. This design can bypass the problem that the traditional exhaust pipe occupies a large amount of space inside the vehicle. In this way, the space originally occupied by the exhaust pipe can be released, providing the possibility of expanding the capacity of the battery pack.

[0057] Alternatively, an exhaust passage 40 is provided in the frame 30. The frame 30 is located at the side of the battery pack and plays a role in supporting and protecting the battery cells.

[0058] By integrating the exhaust channel 40 into the frame 30, the potential of the interior space of the vehicle can be further explored. This design can avoid the space occupation problem that may be caused when the exhaust pipe is separately arranged at the bottom of the vehicle or other positions, and also makes the exhaust system more compact.

[0059] The exhaust channel 40 in the frame 30 can extend along the side of the battery pack to ensure that the exhaust gas can be smoothly discharged from the interior of the vehicle. At the same time, since the frame 30 generally has strong structural strength and rigidity, integrating the exhaust channel 40 into the frame 30 can also improve the stability and durability of the entire exhaust system.

[0060] In order to further improve the exhaust capacity of the tray 100 and achieve higher efficiency in space utilization, in some embodiments, an exhaust channel 40 is provided in both the bottom plate structure 10 and the frame 30. This embodiment not only improves the exhaust capacity of the battery pack tray 100, but also optimizes the internal space layout of the vehicle, providing a possibility for increasing the battery pack capacity.

[0061] Furthermore, it is known to those skilled in the art that in the automotive industry, a large amount of heat energy is generated during the operation of the engine, and a considerable portion of it is lost in different forms, including engine cooling, automobile exhaust emissions, and mechanical friction losses. In particular, the heat taken away during the exhaust emission process accounts for a considerable proportion, usually as high as 30% to 45%. The loss of this part of waste heat energy not only reduces the overall efficiency of the engine, but also leads to a waste of energy.

[0062] Then, the exhaust channel 40 is integrated into the tray 100 of the battery pack, and the coolant for thermal management of the battery pack can be heated in a low temperature environment.

[0063] In some specific embodiments, reference Figure 3-Figure 4 The tray 100 is further provided with a liquid cooling channel 50 disposed adjacent to the exhaust channel 40. When the exhaust channel 40 is disposed in the bottom plate structure 10, the liquid cooling channel 50 includes a first liquid cooling channel 501 disposed in the bottom plate structure 10. When the exhaust channel 40 is disposed in the frame 30, the liquid cooling channel 50 includes a second liquid cooling channel 502 disposed in the frame 30.

[0064] In this design, not only is an exhaust channel 40 provided in the tray 100 to guide the smooth discharge of exhaust gas, but the exhaust channel 40 is also provided near the liquid cooling channel 50 to achieve the recovery and reuse of waste heat energy.

[0065] Specifically, after the engine is started, the high-temperature exhaust gas generated can reach 200°C-600°C. The exhaust gas passes through the first liquid cooling channel 501 or the second liquid cooling channel 502, which can preheat the coolant in the battery pack, thereby reducing the energy consumed by the vehicle heat exchanger to heat the coolant, further saving the energy consumption of the vehicle.

[0066] Optionally, when the exhaust channel 40 is provided in the bottom plate structure 10, the first liquid cooling channel 501 is adjacent to the exhaust channel 40. This arrangement enables the first liquid cooling channel 501 to directly absorb the heat in the exhaust gas and remove it through the circulation of the coolant. Subsequently, the heat can be exchanged with the external environment or the cooling system of the vehicle in the heat exchanger, thereby realizing effective recovery of waste heat energy.

[0067] Alternatively, when the exhaust channel 40 is provided in the frame 30, the second liquid cooling channel 502 is adjacent to the exhaust channel 40. The second liquid cooling channel 502 can absorb the heat generated during the exhaust gas discharge process in the frame 30 and transfer it to the coolant for subsequent treatment. This design not only reduces the occupancy rate of the exhaust channel in the internal structure of the vehicle, but also further improves the thermal management performance of the battery pack.

[0068] In summary, by providing a liquid cooling channel 50 adjacent to the exhaust channel 40 in the tray 100, the present invention realizes efficient recovery and utilization of waste heat energy in the exhaust gas, thereby improving the overall performance and economy of the vehicle.

[0069] A battery pack tray 100 according to some embodiments of the present invention, such as Figure 3 As shown, the liquid cooling channel 50 includes a second liquid cooling channel 502 disposed in the frame 30 . The second liquid cooling channel 502 is disposed on a side of the exhaust channel 40 adjacent to the battery cell installation cavity 101 .

[0070] By setting the position of the second liquid cooling channel 502, it can directly remove the large amount of heat generated by the battery cell when it is working. By ensuring the close contact between the coolant and the battery cell installation cavity 101, the second liquid cooling channel 502 can accelerate the heat exchange process, achieve rapid heat transfer and uniform and stable battery cell temperature. This setting not only improves the efficiency of thermal management, but also helps to extend the service life of the battery cell and ensure that the battery pack operates at the best performance state.

[0071] In addition, the close proximity of the second liquid cooling channel 502 and the exhaust channel 40 in the frame 30 also plays an additional role in thermal isolation. The second liquid cooling channel 502 can, to a certain extent, block the transfer path of exhaust heat from the side beams 31 and longitudinal beams 32 in the frame 30 to the battery cells, thereby avoiding battery performance degradation or potential safety risks caused by high temperature environments. The tray 100 in this embodiment not only enhances the thermal protection capability of the battery pack, but also further improves its overall safety and reliability.

[0072] In some optional embodiments, the tray 100 further includes: a temperature detection element and a cooling pump disposed in the tray 100. The cooling pump is used to inject cooling liquid into the liquid cooling channel 50, or to drive the cooling liquid to flow in the liquid cooling channel 50. The cooling pump is electrically connected to the temperature detection element to operate according to the detection result of the temperature detection element.

[0073] The temperature detection element is arranged in the tray 100. Optionally, the temperature detector can be arranged near the battery cell installation cavity 101 or around the liquid cooling channel 50 so as to monitor the temperature change inside the battery pack in real time and accurately. The temperature detection element can capture tiny temperature fluctuations and convert this information into electrical signals for subsequent processing and analysis.

[0074] As the power source of the thermal management system, the cooling pump is responsible for injecting coolant into the liquid cooling channel 50, or driving the coolant already in the liquid cooling channel 50 to circulate. Under the action of the cooling pump, the coolant continuously flows through the liquid cooling channel 50 near the battery cell installation cavity 101, absorbs and takes away the heat generated by the battery cell, and then exchanges heat with the external environment through the heat exchanger, and finally releases the heat into the air or the vehicle's cooling system.

[0075] The cooling pump and the temperature detection device are electrically connected to achieve linkage. Specifically, when the temperature detection device detects that the temperature inside the battery pack exceeds the preset safety range, it will immediately send a signal to the cooling pump. After receiving the signal, the cooling pump will automatically adjust its working state according to the preset algorithm and logic, such as increasing the coolant flow rate, increasing the circulation speed, etc., to quickly reduce the temperature inside the battery pack. This linkage mechanism not only ensures that the battery pack can operate within the optimal temperature range, but also improves the response speed and accuracy of the thermal management system. It can effectively respond to temperature fluctuations inside the battery pack in a short period of time, prevent performance degradation or safety hazards caused by overheating, and thus improve the efficiency and accuracy of thermal management.

[0076] In some optional embodiments, such as Figure 3-Figure 4 As shown, a partition rib 53 is provided in the liquid cooling channel 50 , and the partition rib 53 extends along the flow direction of the coolant in the liquid cooling channel 50 to separate the single liquid cooling channel 50 into at least two sub-cooling channels 500 .

[0077] In the above technical solution, the partition ribs 53 are provided on the flow path of the coolant as a structural element inside the liquid cooling channel 50. Optionally, the partition ribs 53 are slender and parallel and extend along the main flow direction of the coolant. The main function of these partition ribs 53 is to divide the originally spacious liquid cooling channel 50 into a plurality of relatively narrow and interconnected sub-cooling channels 500.

[0078] By dividing the partition ribs 53, a single liquid cooling channel 50 is converted into at least two or more sub-cooling channels 500. Each sub-cooling channel 500 is responsible for heat exchange with the battery cell, but due to its small size, the flow rate of the coolant in it will be relatively increased, thereby increasing the rate of heat exchange. In addition, the existence of the sub-cooling channel 500 also promotes the uniform distribution of the coolant in the liquid cooling channel 50, reducing the phenomenon of local overheating or insufficient cooling.

[0079] The provision of the partition ribs 53 not only changes the flow path of the coolant, but also has a positive impact on its flow efficiency and heat exchange efficiency. In the sub-cooling channel 500, the coolant is guided and constrained by the partition ribs 53, and the flow is more orderly and efficient. At the same time, due to the existence of the sub-cooling channel 500, the contact area between the coolant and the battery cell is increased to a certain extent, thereby improving the heat transfer efficiency.

[0080] In some optional embodiments, the flow direction of the coolant in the liquid cooling channel 50 is opposite to the flow direction of the exhaust gas in the adjacent exhaust channel 40 .

[0081] When the coolant and exhaust gas flow in opposite directions, the heat exchange efficiency between them will be significantly improved. This is because after the coolant absorbs the heat from the engine, its temperature gradually increases. While the exhaust gas gradually decreases in temperature during the discharge process. This reverse flow design allows the coolant to absorb heat from the exhaust gas more effectively, thereby reducing the temperature of the exhaust gas and improving the heat dissipation efficiency of the coolant.

[0082] In some optional embodiments, combined with Figure 3-Figure 4 The tray 100 further includes a thermoelectric conversion device 60. At least one receiving end of the thermoelectric conversion device 60 is disposed in the exhaust passage 40, or is disposed on the bottom plate structure 10 provided with the exhaust passage 40, or is disposed on the frame 30 provided with the exhaust passage 40.

[0083] The function of the thermoelectric conversion device 60 is to capture waste heat in the exhaust gas and convert it into electrical energy. Therefore, the thermoelectric conversion device 60 can supply power to the vehicle electrical system, reduce the burden on the main battery pack, and extend the driving range of the vehicle.

[0084] Specifically, when the exhaust gas heat passes through the receiving end 61, the liquid cooling plate 11 can start cooling, further increasing the temperature difference on both sides of the receiving end 61, which is beneficial to the conversion of thermal energy into electrical energy.

[0085] It should be noted that the receiving end includes a thermoelectric material layer. The thermoelectric material layer includes a lead telluride material layer, a filled skutterudite material layer, a half-Heusler alloy material layer, i.e., a half-Heusler and other compound material layers. These compound material layers usually have good thermoelectric properties and can generate electricity under temperature differences. The operating temperature range of the thermoelectric material layer is generally 300-700°C, while the temperature range of exhaust gas is generally 200°C-600°C, so the thermoelectric material layer is very suitable for processing the temperature range of automobile exhaust gas.

[0086] When the exhaust gas passes through the attached thermoelectric conversion devices 60, one side of the thermoelectric conversion device 60 is affected by the high temperature exhaust gas, while the other side is close to the cooling liquid channel, thereby forming a temperature difference. Through this temperature difference, the thermoelectric conversion device 60 can generate a DC voltage using the Seebeck effect, thereby generating electrical energy.

[0087] In order to achieve the thermoelectric conversion effect, the receiving end of the thermoelectric conversion device 60 can be flexibly installed in different positions, for example, it can be in the exhaust channel 40, or it can be arranged on the base plate structure 10 or frame 30 provided with the exhaust channel 40, or it can be arranged in the liquid cooling channel 50.

[0088] In order to maximize the heat collection effect, optionally, the receiving end 61 of the thermoelectric conversion device 60 is arranged in the exhaust channel 40. This design allows the thermoelectric conversion device 60 to contact the exhaust gas to the maximum extent, thereby improving the heat collection efficiency.

[0089] Alternatively, the receiving end 61 of the thermoelectric conversion device 60 is disposed inside the bottom plate structure 10 or the frame 30 provided with the exhaust passage 40. This is because the bottom plate structure 10 or the frame 30 itself has a high structural strength, and integrating the thermoelectric conversion device 60 in these locations can enhance the operating stability of the thermoelectric conversion device 60 and reduce the risk of damage caused by vehicle vibration or external impact.

[0090] Meanwhile, it is easier to maintain and clean the receiving end 61 by arranging it on the bottom plate structure 10 or the frame 30. When cleaning or other maintenance work is needed, the thermoelectric conversion device 60 can be accessed by disassembling the bottom plate or the frame 30 of the vehicle, simplifying the maintenance process.

[0091] Optionally, the thermoelectric conversion device 60 is also provided with an output end, which is connected to the conversion module to achieve a voltage stabilization function, ensuring that after the current is stable, it is transmitted to the battery group of the battery pack via the distribution box for energy storage.

[0092] Optionally, at least one receiving end of the thermoelectric conversion device 60 is in a sheet shape and is disposed on the inner wall surface of the exhaust passage 40 .

[0093] First, the receiving end 61 is a sheet-like structure, which increases the surface area of ​​the heat receiving end 61. In the exhaust passage 40, the exhaust gas carries a large amount of heat energy, and the heat energy can be more effectively captured by increasing the area of ​​the heat receiving end 61. Therefore, the sheet-like structure can bring more surface area, which also means that more heat energy can be absorbed and converted into electrical energy, thereby improving the thermoelectric conversion efficiency.

[0094] Secondly, the receiving end 61 of the sheet structure can be better arranged on the inner wall of the exhaust channel 40, so that the heat is more evenly distributed on the receiving end 61. This improves the stability and efficiency of thermoelectric conversion. At the same time, the shape of the exhaust channel 40 may be irregular, and the receiving end 61 of the sheet structure can more easily adapt to some complex shapes. Therefore, by customizing the sheet receiving end 61 of different sizes and shapes, the utilization rate of thermal energy can be improved and the heat exchange area can be maximized.

[0095] Furthermore, when the receiving end 61 is in sheet form, it is usually a thinner material layer, which helps to reduce the thermal resistance in the heat conduction process. The reduction of thermal resistance means that heat can be transferred to the inside of the thermoelectric conversion device 60 more quickly, thereby accelerating the thermoelectric conversion process.

[0096] A battery pack tray 100 according to some embodiments of the present invention, such as Figure 3-Figure 4 As shown, a reinforcing rib 43 is provided in the exhaust channel 40 , and the reinforcing rib 43 extends along the flow direction of the exhaust gas in the exhaust channel 40 to divide the single exhaust channel 40 into at least two sub-channels 401 .

[0097] On the one hand, the reinforcing ribs 43 can provide additional support for the tray 100 .

[0098] When the reinforcing ribs 43 are arranged in the exhaust channel 40 in the bottom plate structure 10, they play a supporting role. These reinforcing ribs 43 can effectively disperse the stress of the tray 100 when it bears the weight of the battery, the vibration during driving, and the potential impact. By increasing the rigidity and strength of the bottom plate structure 10, the bottom plate structure 10 can more effectively prevent compression, deformation and rupture, thereby extending the service life of the battery pack.

[0099] When the reinforcing ribs 43 are provided in the exhaust passage 40 in the frame 30, the stability of the frame 30 can be enhanced. By providing the reinforcing ribs 43, not only the load-bearing capacity of the frame 30 is improved, but also its torsion and bending resistance is enhanced, so that the battery pack can still maintain the structural integrity and stability under some complex and changeable working conditions.

[0100] On the other hand, when the reinforcing ribs 43 are provided, they are provided along the flow direction of the gas, which can reduce the flow resistance of the air flow and reduce the disturbance formed by the exhaust gas mass inside, thereby reducing the problem of poor exhaust.

[0101] In some Figure 3 In the illustrated embodiment, at least one reinforcing rib 43 is provided with a first slot 44 to connect two adjacent air passages 401 .

[0102] When the first slot 44 is disposed on the exhaust channel 40 of the frame 30, it allows the exhaust gas to be exchanged and mixed between adjacent sub-channels 401. This arrangement helps to optimize the airflow distribution and reduce the accumulation of airflow in a specific area, thereby improving the heat dissipation efficiency and the uniformity of gas emission. In addition, the first slot 44 can also serve as a stress release point to reduce the risk of deformation of the frame 30 caused by thermal expansion or mechanical stress.

[0103] When the first slot 44 is disposed on the exhaust passage 40 of the bottom plate structure 10, the flow and heat dissipation of the exhaust gas can be promoted, thereby improving the exhaust gas emission efficiency. At the same time, when the first slot 44 is disposed on the exhaust passage 40 of the bottom plate structure 10, stress can also be released to prevent deformation or cracking of the bottom plate caused by long-term high-temperature operation.

[0104] When the first slot 44 is disposed between the frame 30 and the bottom plate structure 10, the exhaust gas can flow in the exhaust channel 40 formed between the frame 30 and the bottom plate structure 10. This design can increase the contact range between the exhaust gas and the liquid cooling channel 50 in the tray 100, and both the liquid cooling channel 50 at the bottom of the tray 100 and the liquid cooling channel 50 on its side can achieve full contact with the exhaust gas. In an environment with relatively low temperature, the heat energy carried by the exhaust gas is effectively transferred to the coolant in the liquid cooling channel 50 around the battery pack through this multi-directional contact method, thereby increasing the temperature of the entire battery system and ensuring that it can operate within a more ideal temperature range.

[0105] A battery pack tray 100 according to some embodiments of the present invention, such as Figure 1-Figure 2 As shown, the frame 30 includes: two side beams 31 and a longitudinal beam 32. Each side beam 31 is extended along a first direction, and the two side beams 31 are arranged at intervals along a second direction. The longitudinal beam 32 is extended along the first direction, and the longitudinal beam 32 is located between the two side beams 31. The exhaust passage 40 includes a first passage 41, and the first passage 41 is arranged in at least one of the side beam 31 and the longitudinal beam 32.

[0106] In the above technical solution, the side beam 31 is a part of the frame 30, and each side beam 31 is extended along the first direction. Figure 1 Here, the first direction is the length direction of the battery pack; the second direction is the width direction of the battery pack. In some schemes, the first direction is the width direction of the battery pack, and the second direction is the length direction of the battery pack. In this application, the first direction is the length direction of the battery pack, and the second direction is the width direction of the battery pack. The following will not be repeated.

[0107] The two side beams 31 are arranged at intervals along the second direction to form the outer periphery of the battery pack tray 100 .

[0108] The longitudinal beam 32 is extended along the first direction, but is located between the two side beams 31 , so as to strengthen the structural strength of the frame 30 and support the battery cells.

[0109] Optionally, the number of longitudinal beams 32 can be flexibly adjusted according to factors such as the size, weight distribution, and cooling requirements of the battery pack, etc., without limitation.

[0110] The first channel 41 is a part of the exhaust channel 40. The first channel 41 is arranged inside at least one of the side beam 31 and the longitudinal beam 32. Such a layout allows the exhaust gas to flow smoothly inside the frame 30 directly through the first channel 41, and then the exhaust gas is discharged by utilizing the structural characteristics of the tray 100 without installing an additional exhaust pipe. This not only improves the utilization efficiency of the vehicle's internal space, but also realizes the recovery and utilization of exhaust gas heat energy, thereby improving the overall energy efficiency of the vehicle.

[0111] Optionally, there are at least two first channels 41. Figure 1-Figure 2 , Figure 5 As shown, the tray 100 further includes: a multi-way pipe 70, which is disposed at at least one end of the frame 30. When the multi-way pipe 70 is disposed at one end of the frame 30, one of the pipe openings 71 of the multi-way pipe 70 is an inlet 72, and the remaining pipe openings 71 of the multi-way pipe 70 are respectively connected to the first channels 41. When the multi-way pipe 70 is disposed at the other end of the frame 30 (not shown in the figure), one of the pipe openings 71 of the multi-way pipe 70 is an outlet, and the remaining pipe openings 71 of the multi-way pipe 70 are respectively connected to the first channels 41.

[0112] The first channel 41 is a part of the exhaust channel 40. In some solutions, there are two first channels 41, and in some solutions, the number of first channels 41 exceeds two. The specific number of the first channels 41 depends on the size, structural layout and exhaust gas treatment requirements of the battery pack, and is not limited.

[0113] The first channels 41 are evenly distributed inside the side beams 31 or the longitudinal beams 32 , ensuring that the exhaust gas can be evenly distributed and flow smoothly inside the frame 30 .

[0114] The multi-way pipe 70 is a pipe structure with multiple connection ports, which is located at the air inlet end of one end of the frame 30 or the air outlet end of the other end.

[0115] When the multi-channel pipe 70 is disposed at the air inlet end of the frame 30 , it is provided with a special inlet 72 for receiving the exhaust gas. The remaining pipe openings 71 of the multi-channel pipe 70 are respectively connected to each first channel 41 to ensure that the exhaust gas can be evenly distributed to each first channel 41 .

[0116] When the multi-way pipe 70 is arranged at the gas outlet end of the frame 30, it is provided with a special outlet for exhaust gas to be discharged from the vehicle. At this time, the remaining pipe openings 71 of the multi-way pipe 70 are also connected to each first channel 41 respectively, so as to collect and concentrate the exhaust gas for discharge.

[0117] During the exhaust gas flow process, the exhaust gas first enters the tray 100 through the inlet 72 of the multi-way pipe 70, and then is evenly distributed to each first channel 41. Subsequently, the exhaust gas is discharged from the tray 100 through the outlet of the multi-way pipe 70, thereby completing the process of uniform exhaust gas discharge.

[0118] In some optional embodiments, such as Figure 6 As shown, the bottom plate structure 10 includes: a liquid cooling plate 11 and a bottom guard plate 12. The liquid cooling plate 11 is used to cooperate with the side beam 31 and the longitudinal beam 32 to enclose the battery cell installation cavity 101, and the liquid cooling plate 11 defines a bottom liquid channel 111 for heat exchange with the battery cell. The bottom guard plate 12 is located on a side of the liquid cooling plate 11 away from the battery cell installation cavity 101. The exhaust channel 40 includes a second channel 42, and the second channel 42 is provided between the liquid cooling plate 11 and the bottom guard plate 12.

[0119] The liquid cooling plate 11 is a component of the bottom plate structure 10, and is configured to closely cooperate with the side beams 31 and the longitudinal beams 32 to form a battery cell installation cavity 101. The battery cell installation cavity 101 provides a relatively safe and stable working environment for the battery cells.

[0120] Bottom liquid channels 111 are defined inside the liquid cooling plate 11 by processing technology (e.g., the liquid cooling plate is formed by brazing two layers of plates). These bottom liquid channels 111 are paths for the flow of the coolant, and they are in direct contact with the battery cells or indirectly contacted through heat conductive materials to achieve heat dissipation and temperature control of the battery cells.

[0121] The size, shape and distribution of the bottom liquid channel 111 usually take into account the coolant flow rate, flow rate and thermal load distribution of the battery cell to ensure that the battery cell can be maintained within an ideal temperature range during the entire battery pack operation, thereby ensuring the performance and safety of the battery system.

[0122] The bottom guard plate 12 is located on a side of the liquid cooling plate 11 away from the battery cell installation cavity 101. The bottom guard plate 12 can protect the liquid cooling plate 11 and the entire bottom plate structure 10 to a certain extent.

[0123] Optionally, the bottom guard plate 12 is a high-strength, corrosion-resistant material, such as a stainless steel part or an aluminum alloy part, to resist impact and wear from the bottom of the vehicle.

[0124] The second channel 42 is provided between the liquid cooling plate 11 and the bottom guard plate 12, and the space between the two layers of structures is used as a channel for the exhaust gas to flow.

[0125] Such an arrangement not only saves space inside the vehicle, but also enables the exhaust gas to exchange heat with the liquid cooling plate 11 to a certain extent, thereby further recovering the heat energy of the exhaust gas.

[0126] In some optional embodiments, the second channel 42 is connected to the first channel 41 through a multi-channel pipe 70. To form a larger area of ​​exhaust gas emission structure. After the exhaust gas is generated from the inside of the vehicle, it enters the first channel 41 and / or the second channel 42 for heat recovery and emission. The additional exhaust gas emission pipe is reduced to reduce the space occupied by the emission pipe in the vehicle. At the same time, the recovered heat energy can be used to preheat the coolant to further improve the performance of the vehicle.

[0127] In some optional embodiments, combined with Figure 2 and Figure 3 A liquid cooling plate 11 is connected between each side beam 31 and the longitudinal beam 32 , and a second slot 321 is formed between the two liquid cooling plates 11 . The first channel 41 in the longitudinal beam 32 is connected to the second channel 42 through the second slot 321 .

[0128] In the above technical solution, a liquid cooling plate 11 is connected between each side beam 31 and the adjacent longitudinal beam 32. These liquid cooling plates 11 not only enhance the overall structural strength of the frame 30, but also play a role in heat dissipation.

[0129] The liquid cooling plate 11 is tightly connected with the side beam 31 and the longitudinal beam 32 to form a stable and efficient heat dissipation system. This connection method ensures that the heat generated by the battery cell during operation can be dissipated promptly and effectively through the liquid cooling plate 11.

[0130] A second slot 321 is provided between two adjacent liquid cooling plates 11. The second slot 321 is located inside the longitudinal beam 32, providing an additional path for the flow of exhaust gas and the recovery of heat energy. The design of the second slot 321 increases the flow path length of the exhaust gas in the tray 100, improves the efficiency of heat energy recovery, ensures that the exhaust gas can pass smoothly, and fully exchange heat with the liquid cooling plate 11 during the process.

[0131] The design of the second slot 321 increases the flow path of the exhaust gas in the tray 100 and the efficiency of heat recovery, ensuring that the exhaust gas can pass smoothly and fully exchange heat with the liquid cooling plate 11 during the process.

[0132] In addition, a first channel 41 is provided inside the longitudinal beam 32 as a component of the exhaust gas emission system.

[0133] Optionally, the second slot 321 is formed on the longitudinal beam 32 to connect the first channel 41 with the second channel 42 to form an exhaust gas flow path, so that the exhaust gas can effectively exchange heat and finally be discharged out of the vehicle.

[0134] In some optional embodiments, such as Figure 6 As shown, the bottom guard plate 12 is detachably disposed on the tray 100 .

[0135] Since the bottom guard plate 12 is detachable, when the exhaust passage 40 needs to be inspected or repaired, the bottom guard plate 12 can be removed conveniently and quickly without disassembling more structural components. Alternatively, if the bottom guard plate 12 is damaged due to collision or wear during use, a new bottom guard plate 12 can be directly replaced without replacing the entire tray 100 or the bottom plate structure 10, thereby reducing maintenance costs.

[0136] Optionally, the bottom guard plate 12 and the tray 100 may be connected by screwing. When selecting the position of the screwing, it is necessary to avoid the outer edge or the inner flow channel area of ​​the tray 100. This can ensure the firmness of the connection and avoid interference with the internal structure.

[0137] According to the battery pack tray 100 of some embodiments of the present invention, the sum of the cross-sectional areas of all exhaust channels 40 is S, and satisfies

[0138] In the above technical solution, the engine output horsepower is set to P, and the cross-sectional area of ​​all exhaust passages 40 is S, which satisfies: 300mm 2 ≤S≤3200mm 2 .

[0139] According to the above formula, it can be calculated that the intake volume corresponding to each horsepower (hp) is 1.5 cubic inches and the exhaust volume is 2.2 cubic inches.

[0140] In some vehicles, the maximum engine output is 192 horsepower, so the cross-sectional area S of the side beam 31 and the longitudinal beam 32 is ≥ 2370 mm 2 When the width of the side beam 31 and the longitudinal beam 32 in the battery pack is 20-30mm and the height is 90-120mm, and the wall thickness of the side beam 31, the longitudinal beam 32 and the reinforcing rib 43 is 3-5mm, then the cross-sectional area of ​​the exhaust space inside the single beam can be 1260-2640mm 2 , thus, a maximum of two beams can be used to meet the exhaust requirements.

[0141] Specifically, taking some vehicles as an example, this type of vehicle consumes 6.52L of No. 93 gasoline for every 100 kilometers. When the density of gasoline is 0.73 grams per milliliter, one liter of gasoline releases about 46,000 kilojoules of heat when it burns, and 100 kilometers is equal to 219,000 kilojoules. One-third of the heat is taken away by the exhaust gas. Assuming that 100 kilometers are run at a speed of 60 kilometers per hour, the exhaust gas takes away 36.5 kilojoules of heat per second. The operating temperature of the battery in the battery pack is maintained at 20-45°C. The mass flow rate of the coolant (40% ethylene glycol) is 0.35kg / s, the specific heat capacity is 3.5kJ / kg-K, and the water is cooled by 25°C when passing through the system. The water cooling energy is 0.42*3.5*25=36.75 kilojoules. The width of the second liquid cooling channel 502 set in the side beam 31 and the longitudinal beam 32 of the battery pack is 4.4mm, the height is 90-120mm, the wall thickness of the beam and the internal reinforcement rib 43 is 1-3mm, and the length of the battery pack is 1000mm. The mass of cooling water is 90*4.4*1000*(1.07*10-6kg / mm3)=0.423kg, which can meet the heat absorption.

[0142] In summary, the tray 100 of some embodiments of the present invention can maximize the cross-section of the exhaust passage 40. This means that under the same engine output horsepower, the tray 100 can provide a larger flow area and a higher heat recovery efficiency.

[0143] Moreover, the larger cross section helps to reduce the resistance of the exhaust gas flow and improve the efficiency of exhaust gas treatment. At the same time, it can also increase the contact area between the exhaust gas and the liquid cooling plate 11, thereby improving the utilization rate of heat recovery.

[0144] In addition, the larger cross-section helps to reduce noise and vibration of the exhaust passage 40 , thereby improving the ride comfort of the vehicle.

[0145] The tray 100 of the battery pack according to some embodiments of the present invention further includes: a switch valve (not shown) provided on at least one exhaust channel 40 .

[0146] By setting a switching valve, the flexibility and controllability of the exhaust system can be enhanced, and a more sophisticated control method is provided for the thermal management of the battery pack.

[0147] Specifically, at least one switch valve is disposed on the exhaust passage 40. These switch valves may be solenoid valves, pneumatic valves or other types of control valves, and the specific selection depends on the requirements of the system and the working environment.

[0148] The main function of the switch valve is to control the opening and closing of the exhaust passage 40, thereby realizing the regulation of the exhaust gas flow. And by adjusting the opening degree of the switch valve, the flow rate and flow velocity of the exhaust gas can be flexibly adjusted to meet the heat recovery and emission requirements under various working conditions.

[0149] The battery pack according to the second embodiment of the present invention comprises the tray 100 of the battery pack according to the first embodiment of the present invention, and further comprises a battery cell disposed in the battery cell installation cavity 101 .

[0150] By adopting the tray 100 of the battery pack of the first embodiment of the present invention, the exhaust channel 40 is integrated into the tray 100, which, on the one hand, increases the functionality of the battery pack, enables the battery pack to have an exhaust function, and saves external space. On the other hand, the exhaust duct integrated in the tray 100 can use the heat in the exhaust gas to heat the coolant of the battery pack, improve battery performance, and further reduce the energy consumed by the vehicle heat exchanger to heat the coolant, saving the energy consumption of the vehicle.

[0151] A hybrid vehicle according to an embodiment of the third aspect of the present invention comprises: a vehicle body, a battery pack and an engine. The battery pack is arranged on the vehicle body, and the battery pack is the battery pack of the embodiment of the second aspect of the present invention. The engine is arranged on the vehicle body, and the exhaust port of the engine is connected to the air inlet 102 of the tray 100 of the battery pack.

[0152] The hybrid vehicle of the third embodiment of the present invention combines the battery pack with the engine exhaust system to make the overall layout of the hybrid vehicle more compact, reduce the space occupied by the additional pipeline, and improve the space utilization of the vehicle. At the same time, by connecting the engine exhaust port and the air inlet 102 of the tray 100, the heat energy in the exhaust gas can be recycled, thereby achieving efficient use of energy.

[0153] In some embodiments, the hybrid vehicle further includes: a muffler connected to the air outlet 103 of the battery pack tray 100. The muffler can be provided to reduce the noise during exhaust emission and improve driving comfort.

[0154] Reference below Figure 1 - Figure 6 The tray 100 of the battery pack according to the embodiment of the present invention is described in detail with a specific embodiment. It is worth noting that the following description is only an exemplary description and is not a specific limitation of the present invention.

[0155] Reference Figure 1-Figure 2 The tray 100 includes: a bottom plate structure 10, a frame 30 arranged on the bottom plate structure 10, a temperature detection component not shown in the figure, a cooling pump not shown in the figure, a thermoelectric conversion device 60, a multi-way pipe 70 and a switch valve not shown in the figure.

[0156] A cell installation cavity 101 is enclosed between the frame 30 and the bottom plate structure 10 .

[0157] An exhaust channel 40 and a liquid cooling channel 50 are provided on the bottom plate structure 10 and the frame 30 , wherein the exhaust channel 40 is arranged adjacent to the liquid cooling channel 50 , and the coolant in the liquid cooling channel 50 flows in opposite directions to the exhaust gas in the adjacent exhaust channel 40 .

[0158] The frame 30 includes two side beams 31 and a longitudinal beam 32. Each side beam 31 is extended along a first direction, and the two side beams 31 are arranged at intervals along a second direction. The longitudinal beam 32 is extended along the first direction, and is located between the two side beams 31.

[0159] Reference Figure 3-Figure 4 A reinforcing rib 43 is provided in the exhaust passage 40 , and the reinforcing rib 43 extends along the flow direction of the exhaust gas in the exhaust passage 40 to divide the single exhaust passage 40 into a plurality of sub-air passages 401 .

[0160] The reinforcing rib 43 is provided with a first slot 44 to connect two adjacent air channels 401 .

[0161] Reference Figure 3 The exhaust channel 40 includes: a first channel 41 and a second channel 42 .

[0162] The first passage 41 is provided in the side beam 31 and the longitudinal beam 32 .

[0163] Reference Figure 1 The tray 100 is provided with an air inlet 102 and an air outlet 103 which are connected to the exhaust channel 40 .

[0164] Reference Figure 5 The multi-way tube 70 is disposed at one end of the air inlet 102 of the frame 30 , wherein one pipe opening 71 of the multi-way tube 70 is the air inlet 102 , and the remaining pipe openings 71 of the multi-way tube 70 are respectively connected to the first channels 41 .

[0165] Reference Figure 6 The bottom plate structure 10 includes: a liquid cooling plate 11 and a bottom guard plate 12. The liquid cooling plate 11 is used to cooperate with the side beam 31 and the longitudinal beam 32 to enclose the battery cell installation cavity 101, and the liquid cooling plate 11 defines a bottom liquid channel 111 for heat exchange with the battery cell. The bottom guard plate 12 is located on a side of the liquid cooling plate 11 away from the battery cell installation cavity 101. The bottom guard plate 12 is detachably arranged on the tray 100.

[0166] The second channel 42 in the exhaust channel 40 is provided between the liquid cooling plate 11 and the bottom guard plate 12 .

[0167] A liquid cooling plate 11 is connected between each side beam 31 and the longitudinal beam 32 . A second slot 321 is formed between the two liquid cooling plates 11 . The second slot 321 is located in the longitudinal beam 32 .

[0168] A first channel 41 is provided in the longitudinal beam 32 , and the first channel 41 in the longitudinal beam 32 is connected to the second channel 42 through the second slot 321 .

[0169] The liquid cooling channel 50 includes: a first liquid cooling channel 501 provided on the bottom plate structure 10 and a second liquid cooling channel 502 provided on the frame 30. The second liquid cooling channel 502 is provided on one side of the exhaust channel 40 adjacent to the battery cell installation cavity 101.

[0170] The temperature detection element is disposed in the tray 100 .

[0171] The cooling pump is used to drive the coolant in the liquid cooling channel 50 to flow. The cooling pump is electrically connected to the temperature detection element to operate according to the detection result of the temperature detection element.

[0172] Partition ribs 53 are provided in the liquid cooling channel 50 . The partition ribs 53 extend along the flow direction of the coolant in the liquid cooling channel 50 to divide the single liquid cooling channel 50 into at least two sub-cooling channels 500 .

[0173] A portion of the receiving end of the thermoelectric conversion device 60 is disposed in the exhaust passage 40 , and another portion of the receiving end 61 is disposed on the bottom plate structure 10 where the exhaust passage 40 is disposed and on the frame 30 .

[0174] The receiving end of the thermoelectric conversion device 60 is in the shape of a sheet.

[0175] According to the tray 100 of the embodiment of the present invention, the sum of the cross-sectional areas of all the exhaust channels 40 is S, satisfying

[0176]

[0177] The on-off valve is provided on the exhaust passage 40 .

[0178] Other components of the tray 100 of the battery pack according to the embodiment of the present invention, such as the battery pack and the hybrid vehicle, and operations are known to those skilled in the art and will not be described in detail here.

[0179] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0180] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack tray, characterized in that: include: Base structure; A frame is arranged on the bottom plate structure, and a battery cell installation cavity is enclosed between the frame and the bottom plate structure; Wherein, at least one of the bottom plate structure and the frame is provided with an exhaust channel, and the tray is provided with an air inlet and an air outlet connected to the exhaust channel.

2. The battery pack tray according to claim 1, characterized in that: The tray is also provided with a liquid cooling channel arranged adjacent to the exhaust channel; When the exhaust channel is provided in the bottom plate structure, the liquid cooling channel comprises a first liquid cooling channel provided in the bottom plate structure; When the exhaust channel is provided in the frame, the liquid cooling channel includes a second liquid cooling channel provided in the frame.

3. The battery pack tray according to claim 2, characterized in that: The liquid cooling channel includes the second liquid cooling channel arranged in the frame, and the second liquid cooling channel is arranged on a side of the exhaust channel adjacent to the battery cell installation cavity.

4. The battery pack tray according to claim 2, characterized in that: Also includes: A temperature detection member provided in the tray; A cooling pump is used to inject cooling liquid into the liquid cooling channel, or to drive the cooling liquid to flow in the liquid cooling channel. The cooling pump is electrically connected to the temperature detection component to operate according to the detection result of the temperature detection component.

5. The battery pack tray according to claim 2, characterized in that: Partition ribs are arranged in the liquid cooling channel, and the partition ribs extend along the flow direction of the coolant in the liquid cooling channel to separate the single liquid cooling channel into at least two sub-cooling channels.

6. The battery pack tray according to claim 2, characterized in that: The flow direction of the coolant in the liquid cooling channel is opposite to that of the exhaust gas in the adjacent exhaust channel.

7. The battery pack tray according to any one of claims 1 to 6, characterized in that: Also includes: A thermoelectric conversion device, wherein at least one receiving end of the thermoelectric conversion device is arranged in the exhaust passage, or is arranged on the bottom plate structure provided with the exhaust passage, or is arranged on the frame provided with the exhaust passage.

8. The battery pack tray according to claim 7, characterized in that: At least one receiving end of the thermoelectric conversion device is in a sheet shape and is disposed on the inner wall surface of the exhaust passage.

9. The battery pack tray according to any one of claims 1 to 6, characterized in that: A reinforcing rib is arranged in the exhaust channel, and the reinforcing rib extends along the flow direction of the exhaust gas in the exhaust channel to divide the single exhaust channel into at least two sub-channels.

10. The battery pack tray according to claim 9, characterized in that: At least one of the reinforcing ribs is provided with a first slot to connect two adjacent air passages.

11. The battery pack tray according to any one of claims 1 to 6, characterized in that: The framework includes: Two side beams, each of which is extended along a first direction, and the two side beams are arranged at intervals along a second direction; A longitudinal beam, the longitudinal beam extending along the first direction, the longitudinal beam being located between the two side beams; The exhaust passage includes a first passage, and the first passage is arranged in at least one of the side beam and the longitudinal beam.

12. The battery pack tray according to claim 11, characterized in that: There are at least two first channels, and the tray further comprises: a multi-channel pipe, the multi-channel pipe being arranged at at least one end of the frame; When the multi-way pipe is arranged at one end of the frame, one of the pipe openings of the multi-way pipe is an inlet, and the remaining pipe openings of the multi-way pipe are respectively connected to the first channels; When the multi-way pipe is arranged at the other end of the frame, one of the pipe openings of the multi-way pipe is an outlet, and the remaining pipe openings of the multi-way pipe are respectively connected to the first channels.

13. The battery pack tray according to claim 11, characterized in that: The bottom plate structure comprises: A liquid cooling plate, the liquid cooling plate is used to cooperate with the side beams and the longitudinal beams to enclose the battery cell installation cavity, and the liquid cooling plate defines a bottom liquid channel for heat exchange with the battery cell; A bottom guard plate, the bottom guard plate being located on a side of the liquid cooling plate away from the battery cell installation cavity; The exhaust passage includes a second passage, and the second passage is arranged between the liquid cooling plate and the bottom guard plate.

14. The battery pack tray according to claim 13, characterized in that: A liquid cooling plate is connected between each of the side beams and the longitudinal beam, and a second slot is formed between the two liquid cooling plates; The first channel is disposed in the longitudinal beam, and the first channel in the longitudinal beam is connected to the second channel through the second slot.

15. The battery pack tray according to claim 13, characterized in that: The bottom guard plate is detachably arranged on the tray.

16. The battery pack tray according to any one of claims 1 to 6, characterized in that: The sum of the cross-sectional areas of all the exhaust passages is S, and satisfies 17. The battery pack tray according to any one of claims 1 to 6, characterized in that: Also includes: At least one on-off valve is provided on the exhaust passage.

18. A battery pack, characterized in that: A tray comprising a battery pack according to any one of claims 1 to 17, further comprising a battery cell arranged in the battery cell mounting cavity.

19. A hybrid vehicle, characterized in that: include: Vehicle body; A battery pack, the battery pack being arranged on the vehicle body, the battery pack being the battery pack according to claim 18; An engine is arranged on the vehicle body, and an exhaust port of the engine is connected to the air inlet of the tray of the battery pack.

20. The hybrid vehicle according to claim 19, characterized in that: Also includes: A muffler is connected to the air outlet of the tray of the battery pack.

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