Bottom protection plate assembly for vehicle, battery pack and vehicle

Abstract

The utility model discloses a bottom guard plate assembly for a vehicle, a battery pack and the vehicle, and the bottom guard plate assembly comprises a liquid cooling plate which is suitable for being attached to the battery pack at the bottom of the vehicle; the buffer layer is arranged at the bottom of the liquid cooling plate and is constructed as a non-Newtonian fluid layer; the protective layer is arranged at the bottom of the buffer layer, and a cavity used for containing the buffer layer is formed between the protective layer and the liquid cooling plate; wherein a metal plate and an inorganic nonmetal layer covering the outer surface of the metal plate are formed in the protective layer. According to the bottom protection plate assembly, the non-Newtonian fluid layer is arranged at the bottom of the liquid cooling plate, the protection layer is arranged on the side, away from the liquid cooling plate, of the non-Newtonian fluid layer, so that the structural strength and rigidity of the bottom protection plate assembly are improved, and meanwhile the protection layer is composed of the metal plate and the non-metal layer covering the metal plate. And the inorganic nonmetal layer has certain corrosion resistance, so that the metal plate is effectively prevented from being corroded, and the stability of the battery pack during operation is ensured.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, and particularly to an underbody protection plate assembly, a battery pack and a vehicle for a vehicle. Background Art

[0002] In the related art, at present, the battery packs of new energy vehicles are generally arranged under the passenger compartment of the vehicle, and the bottom of the battery pack is exposed at the bottom of the vehicle. Usually, an underbody protection plate assembly is provided at the bottom of the battery pack. The underbody protection plate assembly is composed of a PVC coating, a thin steel plate, a buffer foam and an aluminum alloy liquid cooling plate. However, when the bottom of the battery pack encounters a collision with a large amount of energy, the impact resistance of the thin steel plate and the buffer foam is insufficient, which is likely to cause thermal runaway of the battery pack. Moreover, the PVC coating is easily damaged during a small-energy collision, resulting in corrosion of the thin steel plate inside, and further causing the battery pack to short-circuit due to water ingress, seriously affecting the stability and reliability of the vehicle during operation. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide an underbody protection plate assembly for a vehicle. The underbody protection plate assembly according to the utility model improves the structural strength and stiffness of the underbody protection plate assembly by providing a non-Newtonian fluid layer at the bottom of the liquid cooling plate and providing a protective layer on the side of the non-Newtonian fluid layer facing away from the liquid cooling plate. At the same time, since the protective layer is composed of a metal plate and a non-metallic layer covering the metal plate, the inorganic non-metallic layer has a certain anti-corrosion property, effectively preventing the metal plate from being corroded and ensuring the stability of the battery pack during operation.

[0004] The utility model also provides a battery pack having the above-mentioned underbody protection plate assembly.

[0005] The utility model also provides a vehicle having the above-mentioned battery pack.

[0006] The underbody protection plate assembly for a vehicle according to the utility model includes: a liquid cooling plate, the liquid cooling plate being adapted to be attached to a battery pack at the bottom of the vehicle; a buffer layer, the buffer layer being provided at the bottom of the liquid cooling plate and configured as a non-Newtonian fluid layer; a protective layer, the protective layer being provided at the bottom of the buffer layer, and a cavity for accommodating the buffer layer being formed between the protective layer and the liquid cooling plate; wherein a metal plate and an inorganic non-metallic layer covering the outer surface of the metal plate are formed in the protective layer.

[0007] According to the bottom protection plate assembly of the present utility model, a buffer layer is provided on the side of the liquid cooling plate facing away from the battery pack. The buffer layer can be configured as a non-Newtonian fluid layer. The non-Newtonian fluid layer remains soft under normal conditions and will quickly harden when the non-Newtonian fluid layer is subjected to a large impact force, so as to improve the structural strength and stiffness of the bottom protection plate assembly, thereby protecting the battery pack from physical damage and ensuring the stability and reliability of the battery pack during operation. A protective layer is further provided on the side of the buffer layer facing away from the liquid cooling plate. The protective layer is composed of a metal plate and an inorganic non-metallic layer covering the outer surface of the metal plate. Since the inorganic non-metallic layer has strong anti-deformation performance and anti-corrosion performance, and the metal layer can withstand a large impact force, the protective layer can ensure that the battery pack will not be damaged when it is slightly collided, and at the same time can prevent the metal layer from being eroded, further improving the stability and reliability of the battery pack during operation.

[0008] According to some embodiments of the present utility model, the protective layer includes: a steel plate layer; a first fiberglass layer and a second fiberglass layer, and the first fiberglass layer and the second fiberglass layer are respectively disposed on both sides in the thickness direction of the steel plate layer.

[0009] According to some embodiments of the present utility model, a first groove recessed away from the liquid cooling plate is formed on the steel plate layer, and a second groove and a third groove are respectively formed on the first fiberglass layer and the second fiberglass layer to cooperate with the first groove.

[0010] According to some embodiments of the present utility model, a first overlapping plate is formed on the outer periphery of the steel plate layer, and a second overlapping plate and a third overlapping plate connected to the first overlapping plate are respectively formed on the first fiberglass layer and the second fiberglass layer; wherein the steel plate layer, the first fiberglass layer and the second fiberglass layer are respectively fixedly connected to the first overlapping plate, the second overlapping plate and the third overlapping plate through fasteners.

[0011] According to some embodiments of the present utility model, a fourth overlapping plate is formed on the liquid cooling plate, and the fourth overlapping plate is opposite to the second overlapping plate and is connected through a fastener.

[0012] According to some embodiments of the present utility model, the bottom protection plate assembly further includes: a thermal conductive adhesive layer, and the thermal conductive adhesive layer is disposed on the surface of the liquid cooling plate facing away from the buffer layer to be suitable for contacting the battery pack.

[0013] According to some embodiments of the present utility model, a flow channel body protruding toward the cavity is formed on the liquid cooling plate, and a flow channel for circulating a cooling medium is formed in the flow channel body, and the outer surface of the flow channel body is in contact with the buffer layer.

[0014] According to some embodiments of the present utility model, the flow channel body is configured as a serpentine tube that is spaced apart in the width direction and extends reciprocally in the length direction.

[0015] The battery pack according to the present utility model will be briefly described below.

[0016] The battery pack according to the present utility model is provided with the bottom protection plate assembly described in any one of the above embodiments. Since the battery pack according to the present utility model is provided with the bottom protection plate assembly described in any one of the above embodiments, the structural strength and stiffness of the battery pack according to the present application are higher, and the stability and reliability during the operation of the battery pack are stronger.

[0017] The vehicle according to the present utility model will be briefly described below.

[0018] The vehicle according to the present utility model is provided with the battery pack described in any one of the above embodiments. Since the vehicle according to the present utility model is provided with the battery pack described in any one of the above embodiments, the stability, safety, and reliability during the operation of the vehicle according to the present application are higher.

[0019] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0020] The above and / or additional aspects and advantages of the present utility model will become apparent and be easily understood from the description of the embodiments in conjunction with the following drawings, where:

[0021] Figure 1 is a schematic structural diagram of a bottom protection plate assembly according to an embodiment of the present utility model;

[0022] Figure 2 is a schematic structural diagram of a battery pack according to an embodiment of the present utility model.

[0023] Reference Signs:

[0024] 100, bottom protection plate assembly;

[0025] 11, liquid cooling plate; 111, flow channel body; 12, buffer layer; 13, first fiberglass layer; 14, steel plate layer;

[0026] 15, second fiberglass layer; 21, first overlapping plate; 22, second overlapping plate;

[0027] 23, third overlapping plate; 31, battery pack. Detailed Embodiments

[0028] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0029] In the related art, at present, the battery pack of new energy vehicles is generally arranged under the vehicle occupant compartment, and the bottom of the battery pack is exposed at the bottom of the vehicle. Usually, a bottom guard plate assembly is provided at the bottom of the battery pack. The bottom guard plate assembly is composed of a PVC coating, a thin steel plate, a buffer foam, and an aluminum alloy liquid cooling plate. However, when the bottom of the battery pack encounters a relatively large impact energy, the impact resistance of the thin steel plate and the buffer foam is insufficient, which is likely to cause thermal runaway of the battery pack. In addition, the PVC coating is easily damaged during a small-energy collision, resulting in corrosion of the thin steel plate inside, and further causing the battery pack to short-circuit due to water ingress, seriously affecting the stability and reliability of the vehicle during operation.

[0030] The following refers to Figure 1 - Figure 2 Describe a bottom guard plate assembly for a vehicle according to an embodiment of the present utility model.

[0031] The bottom guard plate assembly 100 for a vehicle according to the present utility model includes: a liquid cooling plate 11, a buffer layer 12, and a protective layer. The liquid cooling plate 11 is adapted to be attached to the battery pack 31 at the bottom of the vehicle; the buffer layer 12 is disposed at the bottom of the liquid cooling plate 11 and is configured as a non-Newtonian fluid layer; the protective layer is disposed at the bottom of the buffer layer 12, and a cavity for accommodating the buffer layer 12 is formed between the protective layer and the liquid cooling plate 11; wherein a metal plate and an inorganic non-metallic layer covering the outer surface of the metal plate are formed in the protective layer.

[0032] In some specific embodiments, the bottom guard plate assembly 100 is composed of a liquid cooling plate 11, a buffer layer 12 and a protective layer. The liquid cooling plate 11 is attached to the battery pack 31 and can exchange heat with the battery pack 31 to achieve heat dissipation of the battery pack 31. A buffer layer 12 is provided on the side of the liquid cooling plate 11 facing away from the battery pack 31. The buffer layer 12 can be configured as a non-Newtonian fluid layer. The non-Newtonian fluid buffer layer 12 can provide unique shock absorption characteristics. The non-Newtonian fluid layer remains soft under normal conditions and will quickly harden when the non-Newtonian fluid layer is subjected to a large impact force, so as to improve the structural strength and stiffness of the bottom guard plate assembly 100, thereby protecting the battery pack 31 from physical damage and ensuring the stability and reliability of the battery pack 31 during operation. A protective layer is also provided on the side of the buffer layer 12 facing away from the liquid cooling plate 11. The protective layer is composed of a metal plate and an inorganic non-metal layer covering the outer surface of the metal plate. When the battery pack 31 is slightly collided, due to the strong anti-deformation performance and anti-corrosion performance of the inorganic non-metal layer and the metal layer can withstand a large impact force, the protective layer can ensure that the battery pack 31 will not be damaged when slightly collided, and at the same time can prevent the metal layer from being eroded, further improving the stability and reliability of the battery pack 31 during operation.

[0033] According to some embodiments of the present invention, for the bottom guard plate assembly 100, a buffer layer 12 is provided on the side of the liquid cooling plate 11 facing away from the battery pack 31. The buffer layer 12 can be configured as a non-Newtonian fluid layer. The non-Newtonian fluid layer remains soft under normal conditions and will quickly harden when the non-Newtonian fluid layer is subjected to a large impact force, so as to improve the structural strength and stiffness of the bottom guard plate assembly 100, thereby protecting the battery pack 31 from physical damage and ensuring the stability and reliability of the battery pack 31 during operation. A protective layer is also provided on the side of the buffer layer 12 facing away from the liquid cooling plate 11. The protective layer is composed of a metal plate and an inorganic non-metal layer covering the outer surface of the metal plate. Due to the strong anti-deformation performance and anti-corrosion performance of the inorganic non-metal layer and the metal layer can withstand a large impact force, the protective layer can ensure that the battery pack 31 will not be damaged when slightly collided, and at the same time can prevent the metal layer from being eroded, further improving the stability and reliability of the battery pack 31 during operation.

[0034] According to some embodiments of the present invention, the protective layer includes: a steel plate layer 14, a first glass fiber layer 13 and a second glass fiber layer 15. The first glass fiber layer 13 and the second glass fiber layer 15 are respectively arranged on both sides of the steel plate layer 14 in the thickness direction.

[0035] In some specific embodiments, the protective layer is composed of a steel plate layer 14, a first fiberglass layer 13, and a second fiberglass layer 15. The steel plate layer 14 is disposed between the first fiberglass layer 13 and the second fiberglass layer 15. When the battery pack 31 is slightly collided, due to the strong anti-deformation performance and anti-corrosion performance of the first fiberglass layer 13 and the second fiberglass layer 15, and at the same time the steel plate layer 14 can withstand a large impact force, therefore, with the cooperation of the steel plate layer 14, the first fiberglass layer 13, and the second fiberglass layer 15, it can be ensured that the battery pack 31 will not be damaged when it is slightly collided, and at the same time, there is no need to replace the bottom guard plate assembly 100, reducing the later maintenance cost and repair cost of the bottom guard plate assembly 100.

[0036] According to some embodiments of the present invention, a first groove recessed away from the liquid cooling plate 11 is formed on the steel plate layer 14, and a second groove and a third groove adapted to the first groove are respectively formed on the first fiberglass layer 13 and the second fiberglass layer 15. The second groove is received in the first groove, and the first groove is received in the third groove. The steel plate layer 14, the first fiberglass layer 13, and the second fiberglass layer 15 are more closely adhered to each other, making the structure of the bottom guard plate assembly 100 more compact.

[0037] According to some embodiments of the present invention, a first overlapping plate 21 is formed on the outer periphery of the steel plate layer 14, and a second overlapping plate 22 and a third overlapping plate 23 connected to the first overlapping plate 21 are respectively formed on the first fiberglass layer 13 and the second fiberglass layer 15; wherein the steel plate layer 14, the first fiberglass layer 13, and the second fiberglass layer 15 are respectively fixedly connected by fasteners to the first overlapping plate 21, the second overlapping plate 22, and the third overlapping plate 23.

[0038] In some specific embodiments, a first overlapping plate 21 is formed on the outer periphery of the steel plate layer 14, a second overlapping plate 22 is formed on the outer periphery of the first fiberglass layer 13, and a third overlapping plate 23 is formed on the outer periphery of the second fiberglass plate. The first overlapping plate 21 is respectively disposed opposite to the second overlapping plate 22 and the third overlapping plate 23, and the first overlapping plate 21, the second overlapping plate 22, and the third overlapping plate 23 are connected together by fasteners, improving the stability and reliability of the connection between the first overlapping plate 21 and the second overlapping plate 22 and the third overlapping plate 23. Even when the vehicle is vibrating or externally impacted during driving, the stability and reliability of the overall structure of the bottom guard plate assembly 100 can be ensured.

[0039] According to some embodiments of the present utility model, a fourth overlapping plate is formed on the liquid cooling plate 11. The fourth overlapping plate faces the second overlapping plate 22 and is connected by fasteners. Through the bolt connection between the fourth overlapping plate and the second overlapping plate 22, the connection strength between the liquid cooling plate 11 and the first fiberglass layer 13 is enhanced, and the stability of the overall structure of the bottom guard plate assembly 100 is improved. Especially when the vehicle encounters bumps or vibrations during driving, it can better maintain the positional relationship between the liquid cooling plate 11 and the first fiberglass layer 13 unchanged, reduce the risk of displacement, misalignment or loosening, and improve the stability and reliability of the connection between the liquid cooling plate 11 and the first fiberglass layer 13. In addition, the use of fastener connection makes the assembly of the liquid cooling plate 11 and the first fiberglass layer 13 more simple and fast. At the same time, when it is necessary to repair or replace the liquid cooling plate 11 or the first fiberglass layer 13, it is also easier to disassemble and reassemble, improving the convenience of maintenance.

[0040] According to some embodiments of the present utility model, the bottom guard plate assembly 100 further includes: a thermal conductive adhesive layer, which is disposed on the surface of the liquid cooling plate 11 facing away from the buffer layer 12 and is adapted to contact the battery pack 31.

[0041] In some specific embodiments, a thermal conductive adhesive layer is further disposed inside the bottom guard plate assembly 100. The thermal conductive adhesive layer is disposed between the battery pack 31 and the liquid cooling plate 11. The thermal conductive adhesive layer can quickly and effectively transfer the heat generated by the battery pack 31 during charging and discharging to the liquid cooling plate 11 and dissipate the heat through the liquid cooling plate 11, effectively preventing the battery pack 31 from overheating, enabling the battery pack 31 to operate within a suitable temperature range, ensuring the stability and reliability of the battery pack 31 during operation and extending its service life. At the same time, since there may be slight unevenness or gaps between the battery pack 31 and the liquid cooling plate 11, a thermal conductive adhesive layer is coated on the surface of the liquid cooling plate 11 facing away from the buffer layer 12 to fill these voids, so as to form a continuous and tight contact surface between the liquid cooling plate 11 and the battery pack 31, thereby optimizing the heat conduction path of the liquid cooling plate 11, reducing the thermal resistance, and improving the heat dissipation efficiency.

[0042] In addition, compared with the traditional bolt-fixed connection method, the use of the thermal conductive adhesive layer simplifies the assembly process and facilitates the installation and future maintenance or replacement of the battery pack 31.

[0043] According to some embodiments of the present utility model, a flow channel body 111 protruding towards the cavity is formed on the liquid cooling plate 11. A flow channel for circulating the cooling medium is formed inside the flow channel body 111. The outer surface of the flow channel body 111 contacts the buffer layer 12.

[0044] In some specific embodiments, a flow channel body 111 protruding towards the battery pack 31 is formed on the surface of the liquid cooling plate 11. A flow channel is formed within the flow channel body 111, and the cooling medium flows within the flow channel and exchanges heat with the battery pack 31 through the flow channel body 111, thereby achieving heat dissipation of the battery pack 31. The outer surface of the flow channel body 111 is in contact with the buffer layer 12, and the buffer layer 12 can provide certain mechanical protection for the flow channel body 111. The buffer layer 12 can absorb external impacts and vibrations, prevent these forces from being directly transmitted to the flow channel body 111, reduce the risk of deformation, rupture or loosening of the connection of the flow channel body 111 caused by physical impacts, thereby protecting the integrity of the flow channel body 111, ensuring that the cooling medium does not leak, and ensuring the normal operation of the battery pack 31.

[0045] According to some embodiments of the present invention, the flow channel body 111 is configured as a serpentine tube that is spaced apart in the width direction and extends reciprocally in the length direction. The arrangement of the serpentine tube can increase the flow path of the cooling medium within the flow channel in a limited space, increase the contact area between the cooling medium and the battery pack 31, thereby improving the heat exchange efficiency between the battery pack 31 and the liquid cooling plate 11. At the same time, the multiple turns of the heat exchange medium in the serpentine tube can effectively slow down the pulsation phenomenon during the flow of the heat exchange medium, reduce vibration and noise, and improve the stability and reliability of heat exchange of the liquid cooling plate 11 during the operation of the battery pack 31.

[0046] The battery pack 31 according to the present invention will be briefly described below.

[0047] The battery pack 31 according to the present invention is provided with the bottom protection plate assembly 100 described in any one of the above embodiments. Since the battery pack 31 according to the present invention is provided with the bottom protection plate assembly 100 described in any one of the above embodiments, the structural strength and stiffness of the battery pack 31 according to the present application are higher, and the stability and reliability during the operation of the battery pack 31 are stronger.

[0048] The vehicle according to the present invention will be briefly described below.

[0049] The vehicle according to the present invention is provided with the battery pack 31 described in any one of the above embodiments. Since the vehicle according to the present invention is provided with the battery pack 31 described in any one of the above embodiments, the stability, safety and reliability of the vehicle according to the present application are higher during operation.

[0050] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model.

[0051] In the description of the present utility model, the "first feature" and "second feature" may include one or more of such features.

[0052] In the description of the present utility model, the meaning of "a plurality of" is two or more.

[0053] In the description of the present utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0054] In the description of the present utility model, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0055] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0056] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A bottom guard plate assembly for a vehicle, characterized in that: include: A liquid cooling plate (11), the liquid cooling plate (11) being suitable for being attached to a battery pack (31) at the bottom of the vehicle; A buffer layer (12), the buffer layer (12) being arranged at the bottom of the liquid cooling plate (11) and being structured as a non-Newtonian fluid layer; a protective layer, the protective layer being arranged at the bottom of the buffer layer (12), and a cavity for accommodating the buffer layer (12) being formed between the protective layer and the liquid cooling plate (11); in The protective layer includes a metal plate and an inorganic non-metal layer covering the outer surface of the metal plate; the protective layer includes: Steel plate layer (14); A first glass fiber layer (13) and a second glass fiber layer (15), wherein the first glass fiber layer (13) and the second glass fiber layer (15) are respectively arranged on both sides of the steel plate layer (14) in a thickness direction.

2. The underbody guard assembly for a vehicle according to claim 1, characterized in that: The steel plate layer (14) is formed with a first groove which is recessed away from the liquid cooling plate (11), and the first glass fiber layer (13) and the second glass fiber layer (15) are respectively formed with a second groove and a third groove which cooperate with the first groove.

3. The underbody guard assembly for a vehicle according to claim 2, characterized in that: The outer periphery of the steel plate layer (14) is formed with a first lap plate (21), and the first glass fiber layer (13) and the second glass fiber layer (15) are respectively formed with a second lap plate (22) and a third lap plate (23) connected to the first lap plate (21); wherein The steel plate layer (14), the first glass fiber layer (13) and the second glass fiber layer (15) are respectively fixedly connected to the first lap plate (21), the second lap plate (22) and the third lap plate (23) by fasteners.

4. The underbody guard assembly for a vehicle according to claim 3, characterized in that: A fourth lap plate is formed on the liquid cooling plate (11), and the fourth lap plate is directly opposite to the second lap plate (22) and is connected via a fastener.

5. The underbody guard assembly for a vehicle according to claim 1, characterized in that: Also includes: A heat-conducting adhesive layer, the heat-conducting adhesive layer being arranged on a surface of a side of the liquid cooling plate (11) away from the buffer layer (12) so as to be suitable for contacting the battery pack (31).

6. The underbody guard assembly for a vehicle according to claim 5, characterized in that: A flow channel body (111) protruding toward the cavity is formed on the liquid cooling plate (11), a flow channel for circulating a cooling medium is formed inside the flow channel body (111), and an outer surface of the flow channel body (111) is in contact with the buffer layer (12).

7. The underbody guard assembly for a vehicle according to claim 6, characterized in that: The flow channel body (111) is constructed as a serpentine tube which is arranged at intervals in the width direction and reciprocates in the length direction.

8. A battery pack (31), characterized in that: A bottom guard plate assembly comprising any one of claims 1-7.

9. A vehicle, characterized in that: Comprising the battery pack (31) as claimed in claim 8.

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