Bottom plate assembly of battery tray, battery assembly and vehicle

Abstract

The utility model relates to a bottom plate assembly of a battery tray, a battery assembly and a vehicle, the bottom plate assembly comprises a first plate body, a second plate body and a convex rib, the first plate body and the second plate body are oppositely arranged, a cooling liquid cavity is defined between the first plate body and the second plate body, and the convex rib is connected between the first plate body and the second plate body; the convex ribs are arranged in the cooling liquid cavity and divide the cooling liquid cavity into a plurality of cooling liquid flow channels, the cooling liquid flow channels are used for allowing cooling liquid to flow through, the convex ribs and one of the first plate body and the second plate body are made of the same material and are integrally formed, and the surface, deviating from the second plate body, of the first plate body is used for supporting a battery module; the heat conductivity coefficient of the first plate body is greater than that of the second plate body, the first plate body is used for heat exchange between the cooling liquid and the battery module, and the second plate body is used for preventing heat of the cooling liquid from diffusing outwards. The bottom plate assembly provided by the utility model can simplify the structure of the battery tray, so that the weight and the manufacturing cost of the battery assembly are reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery assemblies, and in particular, to a bottom plate assembly of a battery tray, a battery assembly, and a vehicle. Background Art

[0002] A battery assembly usually includes a battery tray and a battery module arranged in the accommodating cavity of the battery tray. The battery module generates heat during the charging and discharging process, which increases the temperature of the battery module. The temperature change affects the performance of the battery module and may even cause accidents such as heating, fire, and explosion of the battery module. Therefore, the battery module needs to be cooled to keep it at a suitable temperature.

[0003] In the related art, a separate cooling plate is generally provided in the battery tray, and the cooling plate is used to exchange heat with the battery module to keep the battery module at a suitable temperature. However, providing a cooling plate in the battery tray will not only increase the weight of the battery assembly, but also increase the cost of the battery assembly. Utility Model Content

[0004] The purpose of the present disclosure is to provide a bottom plate assembly of a battery tray, a battery assembly and a vehicle to solve the technical problems existing in the related art.

[0005] In order to achieve the above-mentioned object, according to a first aspect of the present disclosure, there is provided a bottom plate assembly of a battery tray, comprising a first plate body, a second plate body and a convex rib, wherein the first plate body and the second plate body are arranged opposite to each other, a cooling liquid cavity is defined between the first plate body and the second plate body, the convex rib is connected between the first plate body and the second plate body, and divides the cooling liquid cavity into a plurality of cooling liquid flow channels, wherein the cooling liquid flow channels are used for cooling liquid to flow through, and the convex rib is made of the same material as one of the first plate body and the second plate body and is integrally formed;

[0006] Among them, the surface of the first plate body facing away from the second plate body is used to support the battery module, the thermal conductivity of the first plate body is greater than the thermal conductivity of the second plate body, the first plate body is used for heat exchange between the coolant and the battery module, and the second plate body is used to prevent the heat of the coolant from diffusing outward.

[0007] Optionally, the convex rib is integrally formed with the first plate body, and one end of the convex rib away from the first plate body is bonded to the second plate body by a first structural adhesive; or,

[0008] The convex rib is integrally formed with the second plate body, and one end of the convex rib away from the second plate body is bonded to the first plate body by a first structural adhesive.

[0009] Optionally, the convex rib is integrally formed with the first plate body, the first plate body comprises a plurality of long plates arranged along the width direction of the first plate body, each of the long plates extends along the length direction of the first plate body, and each of the long plates is formed with at least one convex rib extending along the length direction of the long plate; or,

[0010] The convex rib is integrally formed with the second plate body, and the second plate body includes a plurality of long plates arranged along the width direction of the second plate body, each of the long plates extends along the length direction of the second plate body, and each of the long plates is formed with at least one convex rib extending along the length direction of the long plate.

[0011] Optionally, every two adjacent long plates are bonded together by a second structural adhesive.

[0012] Optionally, the first plate body is made of aluminum alloy or steel, and the second plate body is made of resin.

[0013] According to a second aspect of the present disclosure, a battery tray is provided, comprising side beams and the above-mentioned bottom plate assembly, wherein the side beams surround the bottom plate assembly and together with the first plate body of the bottom plate assembly define a receiving cavity for receiving a battery module.

[0014] Optionally, the side edge of the first plate body and the side edge of the second plate body are both connected to the side beam, and the side beam, the first plate body and the second plate body jointly define the cooling liquid cavity.

[0015] Optionally, the thermal conductivity of the first plate body is higher than the thermal conductivity of the side beam.

[0016] According to a third aspect of the present disclosure, there is provided a battery assembly, comprising a battery module and the above-mentioned battery tray, wherein the battery module is accommodated in a receiving cavity of the battery tray and supported on a first plate body of the battery tray.

[0017] According to a fourth aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned battery assembly.

[0018] Through the above technical solution, the first plate body and the second plate body can be used as the bottom plate assembly of the battery module tray to support the battery module, and a cooling liquid cavity can be defined between the first plate body and the second plate body, so that the cooling liquid can exchange heat with the battery module supported by the first plate body through the first plate body, ensuring that the temperature of the battery module can be maintained at a suitable temperature. In other words, the bottom plate assembly provided by the present disclosure can be used as the bottom member of the battery tray to support the battery module, and can also have the function of exchanging heat with the battery module. Compared with the technical solution of providing a separate cooling plate on the bottom plate of the battery tray in the related art, the bottom plate assembly provided by the present disclosure can simplify the structure of the battery tray, thereby reducing the weight and manufacturing cost of the battery assembly.

[0019] Furthermore, since the thermal conductivity of the first plate is greater than that of the second plate, when the coolant flows through the coolant flow channel, the heat exchange efficiency between the coolant through the first plate and the battery module can be greater than the heat exchange efficiency between the coolant through the second plate and the outside world. Therefore, without providing other thermal insulation components between the second plate and the outside world, the heat exchange efficiency between the coolant and the battery module can be higher, and the effect of the outside temperature on the coolant and the internal temperature of the battery tray can be lowered, thereby reducing the components of the battery assembly, thereby reducing the weight of the battery assembly, and reducing the cost of the battery assembly.

[0020] In addition, the convex rib and the first plate or the second plate are made of the same material and are integrally formed, which can facilitate the assembly of the first plate, the second plate and the convex rib, simplifying the assembly process. For the embodiment in which the convex rib and the first plate are made of the same material and are integrally formed, the convex rib and the first plate can have good heat exchange efficiency, thereby further improving the heat exchange efficiency between the coolant flowing through the coolant flow channel and the battery module.

[0021] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0023] Figure 1 is a schematic diagram of a three-dimensional structure of a battery tray provided in one embodiment of the present disclosure;

[0024] Figure 2 is a top view of a battery tray provided in one embodiment of the present disclosure;

[0025] Figure 3 is along Figure 2 Sectional view in the AA direction;

[0026] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle.

[0027] Description of Reference Numerals

[0028] 1-battery tray; 10-bottom plate assembly; 11-first plate body; 12-second plate body; 13-convex ribs; 14-long plate; 20-cooling liquid cavity; 21-cooling liquid flow channel; 30-side beam; 31-first side beam; 32-second side beam; 33-third side beam; 34-fourth side beam; 40-accommodating cavity. DETAILED DESCRIPTION

[0029] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0030] In the present disclosure, unless otherwise stated, the directional words used, such as "upper, lower, top, bottom", are usually defined by the drawing direction of the corresponding drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore cannot be understood as a limitation of the present disclosure. "Inside and outside" refer to the inside and outside of the corresponding component outline. In addition, the terms "first", "second", etc., are used to distinguish one element from another, and do not have order and importance.

[0031] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0032] like Figures 1 to 4 As shown, according to the first aspect of the present disclosure, a bottom plate assembly 10 of a battery tray 1 is provided, comprising a first plate body 11, a second plate body 12 and a convex rib 13, wherein the first plate body 11 and the second plate body 12 are arranged opposite to each other, a cooling liquid cavity 20 is defined between the first plate body 11 and the second plate body 12, the convex rib 13 is connected between the first plate body 11 and the second plate body 12, and the cooling liquid cavity 20 is divided into a plurality of cooling liquid channels 21, the cooling liquid channels 21 are used for cooling liquid to flow through, the convex rib 13 and one of the first plate body 11 and the second plate body 12 are made of the same material and are integrally formed, wherein the surface of the first plate body 11 facing away from the second plate body 12 is used to support the battery module, and the thermal conductivity of the first plate body 11 is greater than the thermal conductivity of the second plate body 12. The first plate body 11 is used for heat exchange between the cooling liquid and the battery module, and the second plate body 12 is used to prevent the heat of the cooling liquid from diffusing outward.

[0033] Through the above technical solution, the first plate body 11 and the second plate body 12 can serve as the bottom plate assembly 10 of the battery tray 1 to support the battery module, and a cooling liquid chamber 20 can be defined between the first plate body 11 and the second plate body 12, so that the cooling liquid can pass through the first plate body 11 and exchange heat with the battery module supported by the first plate body 11, ensuring that the temperature of the battery module can be maintained at a suitable temperature. In other words, the bottom plate assembly 10 provided by the present disclosure can serve as the bottom member of the battery tray 1 to support the battery module, and can also have the function of exchanging heat with the battery module. Compared with the technical solution of providing a separate cooling plate on the bottom plate of the battery tray in the related art, the bottom plate assembly 10 provided by the present disclosure can simplify the structure of the battery tray 1, thereby reducing the weight and manufacturing cost of the battery assembly.

[0034] Furthermore, since the thermal conductivity of the first plate 11 is greater than that of the second plate 12, the first plate 11 is used for heat exchange between the coolant and the battery module, and the second plate 12 is used to prevent the heat of the coolant from diffusing outward. Therefore, when the coolant flows through the coolant channel 21, the heat exchange efficiency between the coolant and the battery module through the first plate 11 can be greater than the heat exchange efficiency between the coolant and the outside world through the second plate 12, so that the coolant and the battery module have a higher heat exchange efficiency without setting other heat insulation parts between the second plate 12 and the outside world, and the influence of the outside temperature on the coolant and the internal temperature of the battery tray 1 is lower, so that the components of the battery assembly can be reduced, and then the weight of the battery assembly can be reduced, and the cost of the battery assembly can be reduced.

[0035] In addition, the convex rib 13 and the first plate body 11 or the second plate body 12 are made of the same material and are integrally formed, which can facilitate the assembly of the first plate body 11, the second plate body 12 and the convex rib 13, simplifying the assembly process. For the embodiment in which the convex rib 13 and the first plate body 11 are made of the same material and are integrally formed, the convex rib 13 and the first plate body 11 can have good heat exchange efficiency, thereby further improving the heat exchange efficiency between the coolant flowing through the coolant flow channel 21 and the battery module.

[0036] In order to further improve the heat exchange efficiency between the battery module and the first plate 11, as an implementation method, thermal conductive glue can be filled between the battery module and the first plate 11 to make the contact between the battery module and the first plate 11 closer, thereby further improving the heat exchange efficiency between the battery module and the first plate 11.

[0037] In order to improve the sealing performance between the multiple cooling liquid flow channels 21, for the embodiment in which the convex rib 13 and the first plate body 11 are integrally formed, the end of the convex rib 13 away from the first plate body 11 can be bonded to the second plate body 12 by the first structural adhesive. The gap between the end of the convex rib 13 away from the first plate body 11 and the second plate body 12 is sealed by the first structural adhesive, which can not only improve the sealing performance between the multiple cooling liquid flow channels 21, but also improve the firmness of the connection between the first plate body 11 and the second plate body 12.

[0038] For the embodiment in which the convex rib 13 and the second plate body 12 are integrally formed, the end of the convex rib 13 away from the second plate body 12 is bonded to the first plate body 11 by the first structural adhesive. The gap between the end of the convex rib 13 away from the second plate body 12 and the first plate body 11 is sealed by the first structural adhesive, which can not only improve the sealing between the plurality of coolant flow channels 21, but also improve the firmness of the connection between the first plate body 11 and the second plate body 12.

[0039] In order to reduce the difficulty of manufacturing the integral molding of the rib 13 and the first plate body 11, as an implementation method, Figure 2 As shown, the first plate body 11 includes a plurality of long plates 14 arranged along the width direction of the first plate body 11, each long plate 14 extends along the length direction of the first plate body 11, and each long plate 14 is formed with at least one convex rib 13 extending along the length direction of the long plate 14. Since the area of ​​the long plate 14 is smaller than the entire first plate body 11, it is easier to form the convex rib 13 on the long plate 14 (the requirements for equipment and technology are lower), therefore, the convex rib 13 can be formed on the long plate 14 first, and then the plurality of long plates 14 are connected to form the first plate body 11, which can reduce the manufacturing difficulty of integrally forming the convex rib 13 and the first plate body 11.

[0040] In order to reduce the difficulty of integrally forming the convex rib 13 and the second plate body 12, as an embodiment, the second plate body 12 includes a plurality of long plates 14 arranged along the width direction of the second plate body 12, each long plate 14 extends along the length direction of the second plate body 12, and each long plate 14 is formed with at least one convex rib 13 extending along the length direction of the long plate 14. Since the area of ​​the long plate 14 is smaller than the entire second plate body 12, it is easier to form the convex rib 13 on the long plate 14 (the requirements for equipment and technology are lower), therefore, the convex rib 13 can be formed on the long plate 14 first, and then the plurality of long plates 14 are connected to form the second plate body 12, which can reduce the difficulty of integrally forming the convex rib 13 and the second plate body 12.

[0041] Optionally, each two adjacent long plates 14 can be connected by any suitable method, which is not limited in the present disclosure. As an embodiment, each two adjacent long plates 14 can be bonded by a second structural adhesive, which can achieve the connection between each two adjacent long plates 14 and ensure the sealing between each two adjacent long plates 14.

[0042] As another implementation, every two adjacent long plates 14 may also be connected by welding.

[0043] The present disclosure does not limit the material of the first plate 11. As an embodiment, the material of the first plate 11 may be an aluminum alloy, so that the first plate 11 has a higher thermal conductivity, so that the battery module can be quickly cooled or heated by the coolant.

[0044] As another embodiment, the material of the first plate body 11 can be steel, so that the first plate body 11 has a lower cost, which is conducive to using the battery assembly of the battery tray 1 provided by the present disclosure in vehicles that have low weight requirements but high cost requirements.

[0045] The present disclosure does not limit the material of the second plate body 12. As an implementation mode, the material of the second plate body 12 may be resin, so that the second plate body 12 has a lower heat transfer coefficient.

[0046] According to a second aspect of the present disclosure, a battery tray 1 is provided, such as Figure 1 and Figure 3 As shown, the side beam 30 and the above-mentioned floor assembly 10 are included. The side beam 30 surrounds the floor assembly 10 and defines a receiving cavity 40 for receiving the battery module together with the first plate body 11 of the floor assembly 10.

[0047] The side beam 30 may be formed by any suitable method, which is not limited in the present disclosure. Figure 1 and Figure 2 As shown, the side beam 30 may include a first side beam 31, a second side beam 32, a third side beam 33 and a fourth side beam 34. The first side beam 31, the second side beam 32, the third side beam 33 and the fourth side beam 34 may be manufactured separately, connected to each other by fasteners (such as rivets or bolts), and the gaps at the connections may be sealed by sealant.

[0048] As another embodiment, the side beam 30 may include a first side beam 31 , a second side beam 32 , a third side beam 33 and a fourth side beam 34 , and the first side beam 31 , the second side beam 32 , the third side beam 33 and the fourth side beam 34 are integrally formed.

[0049] In order to further reduce the cost of battery components, as an implementation method, Figure 3 and Figure 4As shown, the side edge of the first plate body 11 and the side edge of the second plate body 12 are connected to the side beam 30, and the side beam 30, the first plate body 11 and the second plate body 12 jointly define the cooling liquid chamber 20. By defining the cooling liquid chamber 20 together with the side beam 30, the side edge of the first plate body 11 and the side edge of the second plate body 12 do not need to be provided with other components, and the cooling liquid chamber 20 can be defined, thereby reducing the cost of the battery tray 1, and further reducing the cost of the battery assembly.

[0050] Optionally, the thermal conductivity of the first plate 11 may be higher than that of the side beam 30 , so that the external environment has less influence on the temperature inside the battery tray 1 , making it easier for the battery tray 1 provided in the present disclosure to control the temperature of the battery module inside it.

[0051] Optionally, the thermal conductivity of the side beam 30 may be equal to the thermal conductivity of the second plate body 12 .

[0052] Optionally, the second plate body 12 and the side beam 30 may be made of the same material, for example, the side beam 30 may be made of resin. Furthermore, a higher strength material (such as a steel plate) may be added to the side beam 30 to improve the structural strength of the side beam 30 .

[0053] According to a third aspect of the present disclosure, a battery assembly is provided, including a battery module and the above-mentioned battery tray 1 , wherein the battery module is accommodated in the accommodating cavity 40 of the battery tray 1 and supported on the first plate body 11 of the battery tray 1 .

[0054] According to a fourth aspect of the present disclosure, a vehicle is provided, comprising the above-mentioned battery assembly.

[0055] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0056] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0057] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A bottom plate assembly of a battery tray, characterized in that: The invention comprises a first plate body, a second plate body and a convex rib, wherein the first plate body and the second plate body are arranged opposite to each other, a cooling liquid cavity is defined between the first plate body and the second plate body, the convex rib is connected between the first plate body and the second plate body, and divides the cooling liquid cavity into a plurality of cooling liquid flow channels, wherein the cooling liquid flow channels are used for cooling liquid to flow through, and the convex rib and one of the first plate body and the second plate body are made of the same material and are integrally formed; Among them, the surface of the first plate body facing away from the second plate body is used to support the battery module, the thermal conductivity of the first plate body is greater than the thermal conductivity of the second plate body, the first plate body is used for heat exchange between the coolant and the battery module, and the second plate body is used to prevent the heat of the coolant from diffusing outward.

2. The base plate assembly according to claim 1, characterized in that: The convex rib is integrally formed with the first plate, and one end of the convex rib away from the first plate is bonded to the second plate by a first structural adhesive; or The convex rib is integrally formed with the second plate body, and one end of the convex rib away from the second plate body is bonded to the first plate body by a first structural adhesive.

3. The base plate assembly according to claim 1, characterized in that: The convex rib is integrally formed with the first plate body, the first plate body comprises a plurality of long plates arranged along the width direction of the first plate body, each of the long plates extends along the length direction of the first plate body, and each of the long plates is formed with at least one convex rib extending along the length direction of the long plate; or, The convex rib is integrally formed with the second plate body, and the second plate body includes a plurality of long plates arranged along the width direction of the second plate body, each of the long plates extends along the length direction of the second plate body, and each of the long plates is formed with at least one convex rib extending along the length direction of the long plate.

4. The base plate assembly according to claim 3, characterized in that: Every two adjacent long plates are bonded together by a second structural adhesive.

5. The floor assembly according to any one of claims 1 to 4, characterized in that: The material of the first plate body is aluminum alloy or steel, and the material of the second plate body is resin.

6. A battery tray, characterized in that: It comprises a side beam and a floor assembly according to any one of claims 1 to 5, wherein the side beam surrounds the floor assembly and defines, together with the first plate body of the floor assembly, a receiving cavity for receiving a battery module.

7. The battery tray according to claim 6, characterized in that: The side edge of the first plate body and the side edge of the second plate body are both connected to the side beam, and the side beam, the first plate body and the second plate body jointly define the cooling liquid cavity.

8. The battery tray according to claim 7, characterized in that: The thermal conductivity of the first plate is higher than the thermal conductivity of the side beam.

9. A battery assembly, characterized in that: It comprises a battery module and a battery tray according to any one of claims 6 to 8, wherein the battery module is accommodated in a receiving cavity of the battery tray and supported on a first plate body of the battery tray.

10. A vehicle, characterized in that: A battery assembly comprising the battery assembly of claim 9.

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