Chassis and vehicle

Abstract

The utility model provides a chassis and a vehicle. The chassis comprises a lower vehicle body, a battery monomer and a heat exchange piece. The lower vehicle body comprises a frame and a floor, the frame is provided with a containing cavity, and the floor covers the containing cavity. The plurality of single batteries are arranged in the accommodating cavity and are connected to the lower side of the floor; the heat exchange piece is arranged on one side, back to the floor, of the battery monomer, and the heat exchange piece is at least connected to the battery monomer. The endurance of the vehicle and the reliability of the battery can be improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a chassis and a vehicle. Background Art

[0002] With the rapid development of automation and intelligent technology, new energy vehicles are becoming increasingly popular and popular among the public. New energy vehicles use batteries as their power source. In addition, to meet the vehicle's high endurance requirements, it is necessary to dissipate heat from the battery during operation to improve the battery's energy exchange efficiency.

[0003] How to improve vehicle endurance and battery reliability is a research direction in vehicle technology. Utility Model Content

[0004] In view of the above problems, the present application provides a chassis and a vehicle that can improve the vehicle's endurance and battery reliability.

[0005] In a first aspect, the present application provides a vehicle chassis, comprising a lower body, battery cells, and a heat exchanger. The lower body comprises a frame and a floor, the frame having a receiving cavity, and the floor covering the receiving cavity. Multiple battery cells are disposed within the receiving cavity and connected to the underside of the floor. The heat exchanger is disposed on the side of the battery cells facing away from the floor, and the heat exchanger is connected to at least one of the battery cells.

[0006] In the above solution, the battery cells are directly integrated into the chassis to eliminate the traditional battery box, increase the battery capacity, and improve the vehicle's endurance. The heat exchange component is set on the side of the battery cell facing away from the floor to reduce the possibility of deformation or even leakage of the heat exchange component in the event of heavy objects falling or sharp objects puncturing, thereby improving the reliability of the battery cell.

[0007] In some embodiments, the heat exchange element includes a first plane facing a side of the battery cell, and the first plane is connected to the battery cell.

[0008] In the above solution, the first plane is provided to increase the contact area between the heat exchange element and the battery cell, thereby increasing the heat exchange area and improving the heat exchange efficiency, thereby reducing the possibility of thermal runaway of the battery cell and improving the reliability of the battery cell.

[0009] In some embodiments, the heat exchange element includes a first plate and a second plate stacked together. A first flat surface is provided on the side of the first plate facing away from the second plate. The second plate includes a main body and a protrusion. The protrusion protrudes from the main body away from the first plate. A flow channel is formed between the protrusion and the first plate. The main body is connected to the first plate. A heat exchange medium flows in the flow channel to exchange heat with the battery cells through the first plate.

[0010] In the above solution, the overall structure of the heat exchanger is simplified, and the difficulty of preparing the heat exchanger is reduced, which is conducive to adjusting the heat exchanger according to the number of battery cells and the connection area, thereby improving the applicability of the heat exchanger.

[0011] In some embodiments, the battery cell includes a pressure relief mechanism and a shell. The pressure relief mechanism is arranged on the side of the shell facing away from the floor, so that the emissions generated when the pressure relief mechanism is actuated are discharged in a direction away from the floor, thereby reducing the possibility of the emissions impacting the floor, and further reducing the risk of emissions entering the passenger compartment and causing personal injury, thereby improving the reliability of the battery cell.

[0012] In some embodiments, the heat exchange component is provided with an avoidance structure, and the avoidance structure is used to avoid substances released by the battery cells through the pressure relief mechanism.

[0013] In the above solution, the avoidance structure can avoid at least part of the substances released by the battery cells through the pressure relief mechanism, so as to reduce the risk of the heat exchange component blocking the release of substances and improve reliability.

[0014] In some embodiments, the avoidance structure includes a through hole opposite to the pressure relief mechanism.

[0015] In the above solution, the substance released by the pressure relief mechanism can pass through the through hole, thereby reducing the risk of the heat exchange component blocking the discharge of the substance, allowing the internal pressure of the battery cell to be released quickly, thereby improving reliability.

[0016] In some embodiments, the heat exchange element is connected to the battery cell via a first adhesive, and the battery cell is connected to the floor via a second adhesive. The thermal conductivity of the first adhesive is greater than that of the second adhesive.

[0017] In the above scheme, by setting adhesives with different thermal conductivity coefficients, the thermal conductivity of the first adhesive is greater than that of the second adhesive, so that the heat generated by the battery cell is more easily transferred from the first adhesive to the heat exchange element, thereby improving the heat exchange efficiency of the heat exchange element, and at the same time reducing the possibility of the temperature generated by the battery cell being transferred to the floor or even the passenger compartment, reducing the possibility of the temperature generated by the battery cell affecting the normal operation of other devices, and improving passenger comfort.

[0018] In some embodiments, the frame includes a first longitudinal beam and a first transverse beam, the first longitudinal beam extending in a length direction of the vehicle, the first transverse beam extending in a width direction of the vehicle, and the first longitudinal beam connected to the first transverse beam.

[0019] In the above scheme, the horizontal and longitudinal beams of the lower body are used as battery boxes, which can reduce some redundant structures of traditional batteries, improve the vehicle's cruising range, and achieve the effect of reducing weight and reducing costs.

[0020] In some embodiments, the frame further includes a second crossbeam disposed in the accommodating cavity, the second crossbeam and the first crossbeam are spaced apart along the length direction, and the second crossbeam is connected to the first longitudinal beam.

[0021] In the above solution, the second crossbeam can strengthen the strength of the frame, reduce the deformation of the frame when the vehicle is subjected to external impact, and reduce the risk of battery cells being compressed and exploded.

[0022] In some embodiments, there are multiple second cross beams, and the multiple second cross beams are spaced apart along the length direction, and battery cells are arranged between adjacent second cross beams.

[0023] In the above solution, the first longitudinal beam and the second transverse beam form a frame structure surrounding the battery cell. The frame structure can protect the battery cell, reduce the risk of the battery cell being subjected to external impact, and improve reliability.

[0024] In some embodiments, the frame further includes a protective plate, which is located on the lower side of the battery cell and covers the accommodating cavity from the lower side. A gap is provided between the protective plate and the heat exchange element.

[0025] In the above solution, the protective plate seals the housing cavity, reducing the impact of external impurities on the battery cells and improving the cycle life of the battery cells. The gap serves as a storage and discharge space for the pressure relief mechanism to release the discharged material. After the discharge is discharged through the through-hole of the heat exchanger, the discharge contacts the heat exchange surface of the heat exchanger, thereby reducing the temperature of the discharge and the possibility of the discharge continuing to affect the battery cells, heat exchanger, and other components, thereby reducing the risk of thermal runaway and improving reliability.

[0026] In some embodiments, the lower body further includes a partition, which is disposed between the heat exchanger and the protective plate. The partition, the heat exchanger, and the protective plate enclose a channel, and the channel is configured so that the released material of the pressure relief mechanism is discharged through the channel.

[0027] In the above solution, the channel can allow the emissions to be discharged along a predetermined path, thereby reducing the possibility of the emissions affecting other devices and improving reliability.

[0028] In some embodiments, there are multiple partitions, and the multiple partitions are arranged on both sides of the heat exchange element along its own width direction.

[0029] In the above scheme, through the above arrangement, the exhaust can contact the large surface of the heat exchange element, thereby improving the heat exchange efficiency between the exhaust and the heat exchange element, further reducing the temperature of the exhaust, reducing the possibility of the exhaust affecting other devices, and improving reliability.

[0030] In some embodiments, the heat exchange member comprises a first plate and a second plate arranged in a stack, the first plate is provided with a first plane on a side facing away from the second plate, the second plate comprises a main body portion and a protruding portion, the protruding portion is arranged to protrude from the main body portion in a direction away from the first plate, and the partition is arranged on a side of the main body portion facing away from the first plate and spaced apart from the protruding portion.

[0031] In the above scheme, the partition occupies less arrangement space of the heat exchange member, thereby increasing the heat exchange area of the heat exchange member and improving the heat exchange efficiency of the heat exchange member.

[0032] In a second aspect, the embodiments of the present application provide a vehicle, comprising the chassis in any of the preceding embodiments and an upper body. The upper body is detachably connected with the chassis.

[0033] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0035] Figure 1 is an explosion structure schematic diagram of a vehicle provided by the embodiments of the present application;

[0036] Figure 2 is a top view axial side structure schematic diagram of a chassis provided by the embodiments of the present application;

[0037] Figure 3 is a bottom view explosion structure schematic diagram of a chassis provided by the embodiments of the present application;

[0038] Figure 4 is a structure schematic diagram of a heat exchange member of a chassis provided by the embodiments of the present application;

[0039] Figure 5 is a bottom view axial side structure schematic diagram of a chassis provided by the embodiments of the present application;

[0040] Figure 6 is Figure 5 is a magnified structure schematic diagram of P in the middle;

[0041] Figure 7 is a cross-sectional structure schematic diagram of a chassis provided by the embodiments of the present application;

[0042] Figure 8 yes Figure 7 A schematic diagram of an amplified structure of Q in the middle;

[0043] Figure 9 This is a schematic diagram of the top structure of a chassis provided in an embodiment of the present application.

[0044] Marking Description

[0045] 100. Vehicles;

[0046] 1. Chassis; 2. Upper body; S. Passenger compartment;

[0047] 10. Lower body; 11. Accommodation cavity; 12. Floor; 13. First longitudinal beam; 14. First cross beam; 15. Second cross beam; 16. Fender;

[0048] 20. Battery cell; 21. Housing; 22. Pressure relief mechanism; 23. Electrode terminals;

[0049] 30. Heat exchange element; 31. First plate; 32. Second plate; 321. Main body; 322. Protrusion; PL, first plane; 33. Avoidance structure;

[0050] 40. Separator; 50. First adhesive member; 60. Second adhesive member;

[0051] X, length direction; Y, width direction. DETAILED DESCRIPTION

[0052] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0054] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0055] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0056] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0057] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0058] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0059] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0060] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply 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 embodiments of the present application.

[0061] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0062] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0063] The battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application.

[0064] In some embodiments, the battery cell may include an outer shell. The outer shell may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film. In some embodiments, the outer shell may be a sealed structure or a non-sealed structure. As an example, when the outer shell is a non-sealed structure, the outer shell serves to protect the electrode assembly, and a sealing bag is further included between the outer shell and the electrode assembly, which is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag may be a bag-shaped insulating member or an aluminum-plastic film. When the outer shell is a sealed structure, it is used to encapsulate components such as the electrode assembly and the electrolyte.

[0065] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, and a polygonal battery. The polygonal battery is, for example, a hexagonal battery, etc. There is no special limitation in this application.

[0066] In some embodiments, the housing includes an end cap and a shell, wherein the shell has an opening and the end cap covers the opening. The shell may have one or more openings. One or more end caps may also be provided.

[0067] In some embodiments, the housing is provided with at least one electrode terminal, which is electrically connected to the tab. The electrode terminal may be directly connected to the tab or indirectly connected to the tab via a current collecting member. The electrode terminal may be provided on an end cap or on the housing.

[0068] In some embodiments, the housing is provided with a pressure relief mechanism for discharging internal gas of the battery cell.

[0069] For example, a battery cell's internal pressure or temperature reaches a predetermined threshold, triggering the release of internal pressure or temperature. When the internal pressure or temperature of the battery cell reaches the predetermined threshold, the pressure relief mechanism activates, or a weakened structure within the pressure relief mechanism is destroyed, thereby creating an opening or channel for the internal pressure or temperature to release. This threshold design varies depending on design requirements. The threshold may depend on the material of one or more of the positive electrode sheet, negative electrode sheet, electrolyte, and separator in the battery cell.

[0070] As an example, the pressure relief mechanism may be integrally formed with the housing.

[0071] As an example, the pressure relief mechanism may also be provided separately from and connected to the housing.

[0072] The "activation" mentioned in this application refers to the action of the pressure relief mechanism or its activation to a certain state, so that the internal pressure and temperature of the battery cell can be released. The action produced by the pressure relief mechanism may include but is not limited to: the movement of components in the pressure relief mechanism to form an exhaust channel, at least a part of the pressure relief mechanism rupturing, breaking, tearing or opening, etc. When the pressure relief mechanism is actuated, the high-temperature and high-pressure substances inside the battery cell will be discharged outward from the actuated part as emissions. In this way, the pressure and temperature of the battery cell can be relieved under controllable pressure or temperature, thereby avoiding potential more serious accidents.

[0073] In some embodiments, when the outer shell is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for discharging gas from inside the battery cell.

[0074] The emissions from the battery cells mentioned in this application include but are not limited to: electrolyte, dissolved or split positive and negative electrode sheets, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0075] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. As battery applications continue to expand, market demand is also growing.

[0076] Usually, the battery's water-cooling plate is combined with the vehicle body floor, or even used instead of the vehicle body floor to improve battery life. However, when heavy objects fall or sharp objects puncture, the water-cooling plate may deform or even leak, which can easily lead to thermal runaway of the battery and reduce the reliability of the battery.

[0077] Based on the above technical problems, the present application provides a technical solution, which integrates the battery cells directly into the chassis to eliminate the traditional battery box, increase the battery capacity, and improve the vehicle's endurance, and arranges the heat exchanger on the side of the battery cell facing away from the floor to reduce the possibility of deformation or even leakage of the heat exchanger in the event of heavy objects falling or sharp objects puncturing, thereby improving the reliability of the battery cells.

[0078] The technical solutions described in the embodiments of this application are applicable to vehicles. The vehicles can be fuel vehicles, gas vehicles, or new energy vehicles. The new energy vehicles can be pure electric vehicles, hybrid vehicles, or extended-range vehicles.

[0079] Figure 1 This is a schematic diagram of the explosion structure of a vehicle provided in an embodiment of the present application.

[0080] like Figure 1 As shown, an embodiment of the present application provides a vehicle 100, which includes a chassis 1 and an upper body 2, wherein the upper body 2 is connected to the chassis 1. The upper body 2 and the chassis 1 are detachably connected.

[0081] Exemplarily, the upper body 2 and the chassis 1 are detachably connected via a connector. The present application does not limit the type of connector; in some examples, the connector may include at least one of a bolt, a nut, a stud, a screw, and a pin. In other examples, the connector may also include a buckle.

[0082] The passenger compartment S may be a space for passengers to sit in, which is formed by the upper vehicle body 2 and the lower vehicle body 10. For example, the passenger compartment S may be provided with seats, armrests and other components.

[0083] Figure 2 This is a schematic diagram of the top-down axial structure of a chassis provided in an embodiment of the present application. Figure 3 This is a schematic diagram of an exploded structure of a chassis provided in an embodiment of the present application when viewed from above.

[0084] like Figures 1 to 3 As shown, an embodiment of the present application provides a chassis 1 of a vehicle 100, comprising a lower body 10, battery cells 20, and a heat exchanger 30. The lower body 10 comprises a frame and a floor 12, wherein the frame has a receiving cavity 11, and the floor 12 covers the receiving cavity 11. A plurality of battery cells 20 are disposed within the receiving cavity 11 and connected to the underside of the floor 12. The heat exchanger 30 is disposed on the side of the battery cells 20 facing away from the floor 12, and the heat exchanger 30 is connected to at least the battery cells 20.

[0085] In some embodiments, the lower body 10 has one or more accommodating cavities 11 , and a battery cell 20 can be disposed in each accommodating cavity 11 .

[0086] Alternatively, the floor 12 may be the floor 12 of the passenger compartment S of the vehicle 100 .

[0087] The floor panel 12 can protect the battery cells 20 from the upper side, thereby reducing the impact on the battery cells 20 when stepped on by passengers.

[0088] In the embodiment of the present application, the battery cell 20 is integrated into the chassis 1 to achieve CTC (Cell to Chassis) battery chassis 1 integration.

[0089] The embodiment of the present application integrates the battery system, drive system and chassis 1 system together, reducing the number of components, saving space, improving structural efficiency, and significantly reducing vehicle weight and increasing battery life.

[0090] In some embodiments, the battery cell 20 is connected to a floor panel, and the floor panel can support multiple battery cells 20 .

[0091] In some embodiments, the battery cells 20 are bonded to the floor. Bonding the battery cells 20 to the floor can also improve the overall rigidity of the floor and reduce deformation of the floor when the vehicle 100 collides.

[0092] Alternatively, the plurality of battery cells 20 may be arranged side by side along the length direction X of the vehicle 100 . The plurality of battery cells 20 may form a battery row along the length direction X, and the plurality of battery rows may be arranged side by side along the width direction Y of the vehicle 100 .

[0093] Optionally, the number of the heat exchange element 30 may be one or more.

[0094] Optionally, the heat exchange element 30 can simultaneously exchange heat with multiple battery cells 20. A flow channel can be provided in the heat exchange element 30, and a heat exchange medium flows in the flow channel to exchange heat with the battery cells 20 through the heat exchange element 30.

[0095] Optionally, the heat exchange element 30 further includes an inlet and an outlet, and the heat exchange medium can flow into the flow channel through the inlet and then flow out of the flow channel through the outlet.

[0096] Optionally, each battery row exchanges heat through a heat exchange element 30 . Two adjacent battery rows may exchange heat through different heat exchange elements 30 .

[0097] Optionally, the heat exchange element 30 may be connected to the battery cell 20 by welding, bonding, clamping, or the like.

[0098] Optionally, the battery cell 20 includes a housing 21 and an electrode assembly. The housing 21 includes a shell and an end cap. The shell has an opening, and the end cap covers the opening to form a cavity. The electrode assembly is disposed in the cavity, and the heat exchange element 30 can be connected to the end cap. Of course, the heat exchange element 30 can also be connected to the housing.

[0099] The embodiment of the present application integrates the battery cell 20 directly into the chassis 1 to eliminate the traditional battery box, increase the battery capacity, and improve the endurance of the vehicle 100, and arranges the heat exchange component 30 on the side of the battery cell 20 facing away from the floor 12 to reduce the possibility of deformation or even leakage of the heat exchange component 30 in the event of heavy objects falling or sharp objects puncturing, thereby improving the reliability of the battery cell 20.

[0100] Figure 4This is a schematic structural diagram of a heat exchange component of a chassis provided in an embodiment of the present application.

[0101] like Figures 2 to 4 As shown, in some optional embodiments, the heat exchange element 30 includes a first plane PL facing the battery cell 20 , and the first plane PL is connected to the battery cell 20 .

[0102] The first plane PL is a flat plane. The first plane PL can be directly attached to the battery cell 20 , or the first plane PL can be bonded to the battery cell 20 by an adhesive material.

[0103] Optionally, the first plane PL may be in contact with the top cover of the battery cell 20. Of course, the first plane PL may also be in contact with the shell of the battery cell 20.

[0104] In the embodiment of the present application, the first plane PL is set to increase the contact area between the heat exchange element 30 and the battery cell 20, thereby increasing the heat exchange area and improving the heat exchange efficiency, thereby reducing the possibility of thermal runaway of the battery cell 20 and improving the reliability of the battery cell 20.

[0105] Figure 5 This is a schematic diagram of the bottom-view axle-side structure of a chassis provided in an embodiment of the present application. Figure 6 yes Figure 5 Schematic diagram of an enlarged structure of P. Figure 7 It is a schematic diagram of the cross-sectional structure of a chassis provided in an embodiment of the present application. Figure 8 yes Figure 7 Schematic diagram of an amplified structure of Q.

[0106] like Figures 2 to 8 As shown, in some optional embodiments, the heat exchange element 30 includes a first plate 31 and a second plate 32 arranged in a stacked manner. A first plane PL is provided on the side of the first plate 31 facing away from the second plate 32. The second plate 32 includes a main body 321 and a protrusion 322. The protrusion 322 protrudes from the main body 321 in a direction away from the first plate 31. A flow channel is formed between the protrusion 322 and the first plate 31, and the main body 321 is connected to the first plate 31. The heat exchange medium flows in the flow channel to exchange heat with the battery cells 20 through the first plate 31.

[0107] Exemplarily, the first plate 31 and the second plate 32 are both plate-shaped structures, and the two can be connected by welding, bonding or other connection methods.

[0108] In some examples, the protrusion 322 is provided on a side of the second plate 32 facing the first plate 31, protruding from the main body 321 in a direction away from the first plate 31. The main body 321 is configured to connect with the first plate 31 to form a flow channel between the first plate 31 and the protrusion 322. Optionally, a concave portion is provided on the surface of the first plate 31 facing the second plate 32, the concave portion opposing the protrusion 322 to form the flow channel, thereby increasing the cross-sectional area of ​​the flow channel.

[0109] It can be understood that the convex portion 322 protrudes from the main body portion 321 so that the surface of the convex portion 322 facing the first plate 31 is recessed to form a recessed surface, and the space between the recessed surface and the first plate 31 forms a flow channel.

[0110] In some embodiments, the first plate 31 and the second plate 32 may both be metal plates.

[0111] Through the above-mentioned arrangement, the embodiment of the present application simplifies the overall structure of the heat exchange element 30 and reduces the difficulty of preparing the heat exchange element 30, which is beneficial for adjusting the heat exchange element 30 according to the number of battery cells 20 and the connection area, thereby improving the applicability of the heat exchange element 30.

[0112] like Figures 5 to 8 As shown, in some optional embodiments, the battery cell 20 includes a pressure relief mechanism 22 and a shell 21. The pressure relief mechanism 22 is arranged on the side of the shell 21 facing away from the floor 12, so that the emissions generated when the pressure relief mechanism 22 is actuated are discharged in a direction away from the floor 12, thereby reducing the possibility of the emissions impacting the floor 12, and further reducing the risk of emissions entering the passenger compartment S and causing personal injury, thereby improving the reliability of the battery cell 20.

[0113] In some examples, the battery cell 20 may further include an electrode terminal 23, which may be located on the same side of the housing 21 as the pressure relief mechanism 22, that is, the electrode terminal 23 may also be located on the side of the housing 21 facing away from the floor 12. In other examples, the electrode terminal 23 and the pressure relief mechanism 22 may be located on different sides of the housing 21, for example, the electrode terminal 23 may be located on the side of the battery cell 20 facing the floor 12.

[0114] like Figure 7 and Figure 8 As shown, in some optional embodiments, the heat exchange element 30 is provided with an avoidance structure 33 , and the avoidance structure 33 is used to avoid substances released by the battery cell 20 through the pressure relief mechanism 22 .

[0115] The avoidance structure 33 may include a hole, slot, or notch, which provides space for the actuation of the pressure relief mechanism 22, reducing the risk of the pressure relief mechanism 22 being blocked by functional components during actuation and allowing the pressure relief mechanism 22 to operate normally. For example, the avoidance structure 33 may also avoid at least a portion of the high-temperature, high-pressure material released by the battery cell 20, providing a discharge channel for the high-temperature, high-pressure material.

[0116] In the embodiment of the present application, the avoidance structure 33 can avoid at least part of the material released by the battery cell 20 through the pressure relief mechanism 22, so as to reduce the risk of the heat exchange component 30 blocking the material release and improve reliability.

[0117] like Figure 7 and Figure 8 As shown, in some optional embodiments, the avoidance structure 33 includes a through hole opposite to the pressure relief mechanism 22 .

[0118] The through hole may be a hole of equal diameter or a hole of reduced diameter, and the hole of reduced diameter may be a stepped hole, a trapezoidal hole or other holes.

[0119] The through hole and the pressure relief mechanism 22 are opposite to each other, which means that the through hole and the pressure relief mechanism 22 at least partially overlap in the axial direction of the through hole.

[0120] The substances released by the pressure relief mechanism 22 can pass through the through hole, thereby reducing the risk of the heat exchange element 30 blocking the discharge of the substances, so that the internal pressure of the battery cell 20 can be released quickly, thereby improving reliability.

[0121] In some embodiments, when the pressure relief mechanism 22 is actuated, a relief channel is formed. In the direction in which the battery cell 20 and the heat exchange element 30 are arranged side by side, the projection of the relief channel is located within the projection of the through hole.

[0122] In some embodiments, the number of through holes on the heat exchanger 30 can correspond to the number of pressure relief mechanisms 22. In other examples, the heat exchanger 30 can be provided with elongated holes, and in the direction in which the battery cells 20 and the heat exchanger 30 are arranged side by side, the projections of the discharge channels of multiple pressure relief mechanisms 22 are all located within the projection of a single elongated hole.

[0123] like Figure 3 As shown, in some optional embodiments, the heat exchange element 30 is connected to the battery cell through a first adhesive 50 , and the battery cell is connected to the floor through a second adhesive 60 , and the thermal conductivity of the first adhesive 50 is greater than the thermal conductivity of the second adhesive 60 .

[0124] Optionally, the first adhesive member 50 and the second adhesive member 60 are both adhesive glues. For example, the first adhesive member 50 and the second adhesive member 60 are adhesive glues made of different materials.

[0125] Thermal conductivity is a physical quantity that measures the ability of a material to conduct heat. It indicates the amount of heat that can be transferred per unit area under a unit temperature gradient per unit time.

[0126] In these optional embodiments, by providing adhesives with different thermal conductivity coefficients, the thermal conductivity of the first adhesive 50 is made greater than that of the second adhesive 60, thereby making it easier for the heat generated by the battery cell 20 to be transferred from the first adhesive 50 to the heat exchanger 30, thereby improving the heat exchange efficiency of the heat exchanger 30, and at the same time reducing the possibility of the temperature generated by the battery cell 20 being transferred to the floor 12 or even the passenger compartment S, reducing the possibility of the temperature generated by the battery cell 20 affecting the normal operation of other devices, and improving passenger comfort.

[0127] Figure 9 This is a schematic diagram of the top structure of a chassis provided in an embodiment of the present application.

[0128] like Figure 9 As shown, in some optional embodiments, the frame includes a first longitudinal beam 13 and a first cross beam 14 , the first longitudinal beam 13 extends along the length direction X of the vehicle 100 , the first cross beam 14 extends along the width direction Y of the vehicle 100 , and the first longitudinal beam 13 is connected to the first cross beam 14 .

[0129] Optionally, the length direction X intersects the width direction Y. For example, the length direction X is parallel to the arrangement direction of the front and rear of the vehicle 100.

[0130] The first longitudinal beam 13 may be directly connected to the first transverse beam 14 , or may be indirectly connected to the first transverse beam 14 through other components.

[0131] By using the transverse and longitudinal beams of the lower vehicle body 10 as a battery box, some redundant structures of the traditional battery can be reduced, the cruising range of the vehicle 100 can be improved, and the weight and cost can be reduced.

[0132] In some embodiments, the frame includes two first longitudinal beams 13 and two first transverse beams 14 , the two first longitudinal beams 13 are respectively located on both sides of the multiple battery cells 20 along the width direction Y, the two first transverse beams 14 are respectively located on both sides of the multiple battery cells 20 along the length direction X, and each first transverse beam 14 is connected to the two first longitudinal beams 13 .

[0133] For example, the two first longitudinal beams 13 are spaced apart along the width direction Y of the vehicle 100 , and the two first cross beams 14 are spaced apart along the length direction X of the vehicle 100 . The first longitudinal beam 13 connects the two first cross beams 14 .

[0134] In some embodiments, the floor panel 12 is connected to two first beams 14 .

[0135] In some embodiments, the floor panel 12 is connected to two first longitudinal beams 13 .

[0136] like Figure 9 As shown, in some optional embodiments, the frame further includes a second crossbeam 15 disposed in the accommodating cavity 11 , the second crossbeam and the first crossbeam 14 are spaced apart along the length direction X, and the second crossbeam 15 is connected to the first longitudinal beam 13 .

[0137] There may be one or more second cross beams 15 .

[0138] The second cross beam 15 can strengthen the strength of the frame, reduce deformation of the frame when the vehicle 100 is subjected to external impact, and reduce the risk of the battery cells 20 being compressed and exploded.

[0139] like Figure 9 As shown, in some optional embodiments, there are multiple second cross beams 15 , and the multiple second cross beams 15 are spaced apart along the length direction X, and battery cells 20 are arranged between adjacent second cross beams 15 .

[0140] The second cross member 15 can protect the battery cells 20 from both sides.

[0141] In some embodiments, each second transverse beam 15 connects two first longitudinal beams 13 .

[0142] In some embodiments, at least two second cross beams 15 , two first longitudinal beams 13 and the floor panel enclose a receiving cavity 11 having an opening, the opening facing the floor panel 12 , and a plurality of battery cells 20 are received in the receiving cavity 11 .

[0143] There can be one or more accommodating cavities.

[0144] The first longitudinal beam 13 and the second transverse beam 15 form a frame structure surrounding the battery cell 20 . The frame structure can protect the battery cell 20 , reduce the risk of the battery cell being subjected to external impact, and improve reliability.

[0145] In some embodiments, there are three second cross beams 15 and two receiving chambers 11 .

[0146] The three second transverse beams 15 , the two first longitudinal beams 13 and the floor panel can enclose and form two accommodating cavities 11 .

[0147] The three second cross beams 15 can improve the overall strength of the lower vehicle body 10 , reduce the deformation of the first longitudinal beam 13 when the vehicle 100 is hit from the side, reduce the pressure on the battery cells 20 , and improve reliability.

[0148] In some embodiments, the first longitudinal beam 13 and the second transverse beam 15 may be connected by CMT (Cold Metal Transfer) welding, rotary tapping riveting (FDS), self-piercing riveting (SPR), or the like.

[0149] In some embodiments, the heat exchange element 30 is connected to the first longitudinal beam 13 .

[0150] In some embodiments, the heat exchange element 30 is connected to the first beam 14 .

[0151] In some embodiments, the heat exchange element 30 is connected to the second cross beam 15 .

[0152] like Figures 3 to 8 As shown, in some optional embodiments, the frame further includes a protective plate 16, which is located on the lower side of the battery cell 20 and covers the accommodating cavity 11 from the lower side. A gap is provided between the protective plate 16 and the heat exchange element 30.

[0153] In some embodiments, the protection plate 16 is fixedly connected to the first longitudinal beam 13 .

[0154] In some embodiments, the protective plate 16 is detachably connected to the first longitudinal beam 13, thereby facilitating maintenance of the battery cells 20. For example, the protective plate 16 can be connected to the first longitudinal beam 13 by bolts.

[0155] In some embodiments, the protection plate 16 is fixedly connected to the first crossbeam 14 .

[0156] In some embodiments, the protective plate 16 is detachably connected to the first cross member 14, thereby facilitating maintenance of the battery cells 20. For example, the protective plate 16 can be connected to the first cross member 14 by bolts.

[0157] In some embodiments, a sealing gasket is provided between the protective plate 16 and the first longitudinal beam 13. Optionally, the sealing gasket may be foam. Alternatively, a sealant may be provided between the protective plate 16 and the first longitudinal beam 13.

[0158] In some embodiments, the protection plate 16 is connected to the second cross beam 15. Optionally, the protection plate 16 is connected to the second cross beam 15 by bolts.

[0159] In some alternative embodiments, the second cross beam 15 may be omitted, and the first cross beam 14 , the first longitudinal beam 13 and the floor may be used to enclose and form the accommodating cavity 11 .

[0160] In some embodiments, the protection plate 16 and the heat exchange element 30 are spaced apart to form a gap between the protection plate 16 and the heat exchange element 30 .

[0161] In some embodiments, the through hole may connect the bleed channel and the gap.

[0162] In the embodiment of the present application, the protective plate 16 can seal the accommodating cavity 11, reducing the impact of external impurities on the battery cells 20 and improving the cycle life of the battery cells 20. The gap can serve as a space for the pressure relief mechanism 22 to store and release the discharged substances. After the discharge is discharged through the through-holes of the heat exchange element 30, the discharge contacts the heat exchange surface of the heat exchange element 30, thereby reducing the temperature of the discharge and the possibility of the discharge continuously affecting the battery cells 20, the heat exchange element 30 and other components, thereby reducing the risk of thermal runaway and improving reliability.

[0163] like Figures 3 to 8 As shown, in some optional embodiments, the lower body 10 further includes a partition 40, which is disposed between the heat exchange element 30 and the protective plate 16. The partition 40, the heat exchange element 30 and the protective plate 16 enclose a channel, and the channel is configured so that the released material of the pressure relief mechanism 22 is discharged through the channel.

[0164] Optionally, the partition 40 may be a heat insulating material.

[0165] Optionally, the separator 40 may be in the shape of a long strip.

[0166] Optionally, the number of the partitions 40 may be one or more.

[0167] Optionally, the partition 40 , the heat exchange element 30 and the protective plate 16 enclose a channel, and the channel may extend along the length direction X of the vehicle 100 .

[0168] Optionally, the passage may be connected to a plurality of pressure relief mechanisms 22 , so that the pressure relief passages are connected to the passages when the pressure relief mechanisms are actuated.

[0169] Optionally, the number of channels may be one or more.

[0170] In the embodiment of the present application, the channel can allow the emissions to be discharged along a predetermined path, thereby reducing the possibility of the emissions affecting other devices and improving reliability.

[0171] like Figures 3 to 8 As shown, in some optional embodiments, there are multiple partitions 40, and the multiple partitions are arranged on both sides of the heat exchange element 30 along the width direction Y of the heat exchange element 30.

[0172] In some embodiments, there are two partitions 40 , which are disposed on both sides of the heat exchange element 30 along its width direction Y, so that the area between the two partitions 40 forms a channel.

[0173] In some alternative embodiments, the number of the partitions 40 is more than two, and a plurality of partitions 40 are provided on one side of the heat exchange element 30 along the width direction Y to form multiple channels, each of which may be connected or disconnected.

[0174] Through the above-mentioned arrangement, the embodiment of the present application allows the exhaust to contact the large surface of the heat exchange element 30, thereby improving the heat exchange efficiency between the exhaust and the heat exchange element 30, further reducing the temperature of the exhaust, reducing the possibility of the exhaust affecting other devices, and improving reliability.

[0175] like Figures 3 to 8 As shown, in some optional embodiments, the heat exchange element 30 includes a first plate 31 and a second plate 32 arranged in a stacked manner, a first plane PL is provided on the side of the first plate facing away from the second plate 32, the second plate includes a main body 321 and a convex portion 322, the convex portion is provided to protrude from the main body 321 in a direction away from the first plate 31, and the partition 40 is provided on the side of the main body facing away from the first plate 31 and is spaced apart from the convex portion 322.

[0176] Optionally, the surface of the partition 40 facing away from the first plate 31 abuts against the protective plate 16 , and the surface of the protrusion 322 facing away from the first plate 31 is spaced apart from the protective plate 16 .

[0177] In some embodiments, the partition 40 is disposed on a surface of the main body 321 facing away from the first plate 31 , and a plurality of partitions 40 are disposed on both sides of the heat exchange element 30 along the width direction Y thereof.

[0178] Optionally, the separator 40 and the main body 321 may be fixedly connected by bonding, snapping, or the like.

[0179] Optionally, the partition 40 and the protective plate 16 may be fixedly connected by bonding, snapping, or the like.

[0180] The partition 40 and the protrusion 322 are spaced apart to reduce the possibility of interference between the partition 40 and the protrusion 322 .

[0181] The above-mentioned arrangement in the embodiment of the present application is helpful in reducing the layout space occupied by the partition 40 of the heat exchange element 30, thereby increasing the heat exchange area of ​​the heat exchange element 30 and improving the heat exchange efficiency of the heat exchange element.

[0182] In a second aspect, an embodiment of the present application provides a vehicle 100, comprising the chassis 1 and the upper body 2 according to any of the aforementioned embodiments. The upper body is detachably connected to the chassis.

[0183] According to some embodiments of this application, please refer to Figures 1 to 8The chassis 1 includes a lower body 10, battery cells 20, and a heat exchanger 30. The lower body 10 includes a frame and a floor 12. The frame has a receiving cavity 11, and the floor covers the receiving cavity 11. Multiple battery cells 20 are disposed in the receiving cavity and connected to the underside of the floor 12. The heat exchanger 30 is disposed on the side of the battery cells 20 facing away from the floor 12 and is connected to at least the battery cells 20.

[0184] The heat exchange element 30 includes a first flat surface PL facing the battery cell side and connected to the battery cell 20. The heat exchange element 30 comprises a stacked first plate 31 and a second plate 32. The first flat surface PL is located on the side of the first plate facing away from the second plate 32. The second plate includes a main body 321 and a protrusion 322. The protrusion 322 protrudes from the main body 321 away from the first plate 31, forming a flow channel between the protrusion 322 and the first plate 31. The main body 321 is connected to the first plate 31. The separator 40 is located on the side of the main body 321 facing away from the first plate 31 and is spaced apart from the protrusion 322.

[0185] The battery cell 20 includes a pressure relief mechanism 22 and a housing 21. The pressure relief mechanism is located on the side of the housing facing away from the floor 12. The heat exchanger 30 is provided with a relief structure 33, which is used to avoid the release of substances from the battery cell 20 through the pressure relief mechanism 22. The relief structure 33 includes a through hole opposite the pressure relief mechanism 22.

[0186] The heat exchange element 30 is connected to the housing 21 via a first adhesive 50 , and the housing is connected to the floor via a second adhesive 60 . The thermal conductivity of the first adhesive 50 is greater than that of the second adhesive 60 .

[0187] The lower body 10 also includes a partition 40 disposed between the heat exchange element 30 and the protective plate 16. The partition 40, the heat exchange element 30, and the protective plate 16 together form a channel through which the discharged material from the pressure relief mechanism 22 is discharged. Multiple partitions 40 are provided, one on each side of the heat exchange element 30 along its width direction Y.

[0188] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A chassis of a vehicle, characterized in that: include: The lower vehicle body comprises a frame and a floor, wherein the frame has a receiving cavity and the floor covers the receiving cavity; a plurality of battery cells disposed in the accommodating cavity and connected to the underside of the floor; The heat exchange component is arranged on a side of the battery cell facing away from the floor and is at least connected to the battery cell.

2. The chassis according to claim 1, characterized in that The heat exchange member includes a first plane facing one side of the battery cell, and the first plane is connected to the battery cell.

3. The chassis according to claim 2, characterized in that The heat exchange element includes a first plate and a second plate arranged in a stacked manner, a first plane is provided on the side of the first plate facing away from the second plate, the second plate includes a main body and a convex portion, the convex portion is provided to protrude from the main body in a direction away from the first plate, a flow channel is formed between the convex portion and the first plate, and the main body is connected to the first plate.

4. The chassis according to claim 1, characterized in that The battery cell includes a pressure relief mechanism and a shell. The pressure relief mechanism is arranged on a side of the shell facing away from the floor.

5. The chassis according to claim 4, characterized in that The heat exchange component is provided with an avoidance structure, and the avoidance structure is used to avoid substances released by the battery cells through the pressure relief mechanism.

6. The chassis according to claim 5, characterized in that The avoidance structure includes a through hole opposite to the pressure relief mechanism.

7. The chassis according to claim 1, characterized in that The heat exchange member is connected to the battery cell via a first adhesive member, and the battery cell is connected to the floor via a second adhesive member. The thermal conductivity of the first adhesive member is greater than that of the second adhesive member.

8. The chassis according to claim 1, characterized in that The frame includes a first longitudinal beam and a first transverse beam, the first longitudinal beam extending in a length direction of the vehicle, the first transverse beam extending in a width direction of the vehicle, and the first longitudinal beam connected to the first transverse beam.

9. The chassis according to claim 8, characterized in that The frame further includes a second crossbeam disposed in the accommodating cavity, the second crossbeam and the first crossbeam are spaced apart along the length direction, and the second crossbeam is connected to the first longitudinal beam.

10. The chassis according to claim 9, characterized in that There are a plurality of second cross beams, and the plurality of second cross beams are spaced apart along the length direction, and the battery cells are arranged between adjacent second cross beams.

11. The chassis according to claim 1, characterized in that The frame further includes a protective plate, which is located at the lower side of the battery cell and covers the accommodating cavity from the lower side; a gap is provided between the protective plate and the heat exchange component.

12. The chassis according to claim 11, characterized in that The lower vehicle body further includes a partition, which is disposed between the heat exchange component and the protective plate. The partition, the heat exchange component, and the protective plate enclose a channel, and the channel is configured so that the discharged material of the pressure relief mechanism is discharged through the channel.

13. The chassis according to claim 12, characterized in that There are multiple separators, and the multiple separators are arranged on both sides of the heat exchange element along its own width direction.

14. The chassis according to claim 12, characterized in that The heat exchange element includes a first plate and a second plate arranged in a stacked manner, a first plane is provided on the side of the first plate facing away from the second plate, the second plate includes a main body and a convex portion, the convex portion is provided to protrude from the main body in a direction away from the first plate, and the partition is provided on the side of the main body facing away from the first plate and is spaced apart from the convex portion.

15. A vehicle, characterized in that: include: A chassis as claimed in any one of claims 1 to 14; The upper vehicle body is detachably connected to the chassis.

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