Battery box tray, battery pack and energy storage platform

Abstract

The utility model relates to the field of structural components of electrochemical cell non-active components except fuel cell, especially relates to a battery box tray, battery package and energy storage platform. The battery box tray includes the frame, the cold plate connected with the frame and the bottom reinforced beam connected with the frame, the cold plate includes the top plate and the bottom plate, is equipped with the heat exchange medium flow channel and the mutually pasted sealing pasting part between the top plate and the bottom plate, the bottom plate is provided with the convex structure protruding to the direction away from the top plate at the sealing pasting part, the fastener cavity for accommodating the fastener is formed between the inside of convex structure and the top plate, the bottom plate connecting portion corresponding with the fastener cavity is provided on the bottom reinforced beam, and the bottom plate is fixedly connected through the fastener arranged in the fastener cavity between the bottom plate connecting portion. The utility model fixes and connects the bottom plate and the bottom reinforced beam together through the fastener, so that the cold plate and the frame and the bottom reinforced beam form the integral type structure, and higher mechanical strength is obtained.

Description

Technical Field

[0001] This utility model relates to the field of structural components for non-active parts of electrochemical batteries other than fuel cells, and in particular to a battery box tray, battery pack and energy storage platform. Background Technology

[0002] A battery tray is a structured enclosure used to integrate and secure battery modules. It is commonly found in new energy vehicles or energy storage systems. By installing battery modules in a modular manner within an enclosure with a tray structure, a compact layout, efficient management, and safety protection of the battery system are achieved.

[0003] In a tray-type battery box, the battery box tray serves as the primary load-bearing and cooling component, and its structural reliability directly impacts the overall reliability of the battery box. In existing technology, the main components of the battery box tray include a surrounding frame, a cold-plate connected to the frame, a bottom reinforcing beam, and module beams. The bottom reinforcing beam is located below the cold-plate and its ends are fixedly connected to the frame by welding or other methods. The module beams are located above the cold-plate and are used to support and secure the battery modules.

[0004] In the above structure, the cold-plate is mostly made of aluminum, the frame is made of aluminum profiles or steel, and the bottom reinforcing beam is made of steel. Due to sealing considerations, the bottom reinforcing beam cannot be welded to the cold-plate; it can only be fixed by welding and riveting at the overlap with the frame. This fixing method has poor mechanical strength for large-capacity battery packs (such as 104-cell battery packs), and during transportation, factors such as vibration may cause the weld at the fixing point between the bottom reinforcing beam and the frame to crack and fail. Utility Model Content

[0005] One of the objectives of this utility model is to provide a battery box tray to solve the problem of poor mechanical strength of existing tray-type battery boxes.

[0006] Meanwhile, the purpose of this utility model is also to provide a battery pack using the above-mentioned battery box tray and an energy storage platform using the battery pack.

[0007] To solve the above problems, the battery box tray of this utility model adopts the following technical solution:

[0008] The battery box tray includes a frame, a cold plate connected to the frame, and a bottom reinforcing beam connected to the frame. The cold plate includes a top plate and a bottom plate. A heat exchange medium flow channel and a sealing fitting part are provided between the top plate and the bottom plate. The bottom plate has a protruding structure at the sealing fitting part that protrudes away from the top plate. The interior of the protruding structure and the top plate form a fastener cavity for accommodating fasteners. The bottom reinforcing beam has a bottom plate connecting part corresponding to the fastener cavity. The bottom plate and the bottom plate connecting part are fixedly connected by fasteners provided in the fastener cavity.

[0009] Beneficial effects of the battery box tray: The battery box tray of this utility model is an improved invention. Specifically, the battery box tray has a fastener cavity set on the sealing and fitting part of its cold plate bottom plate. Since the fastener cavity is located in the sealing and fitting part, it is surrounded by the sealing and fitting parts of the top and bottom plates of the cold plate, thus not affecting the sealing performance of the cold plate and the battery box. By setting the fastener cavity, the bottom plate and the bottom reinforcing beam can be fixedly connected together by fasteners without affecting the flatness of the top surface of the cold plate, thereby forming an integral structure of the cold plate, frame and bottom reinforcing beam, and obtaining higher mechanical strength.

[0010] The battery pack of this utility model adopts the following technical solution:

[0011] A battery pack includes a housing and a battery assembly. The housing includes a battery tray and a cover. The battery tray includes a frame, a cold plate connected to the frame, and a bottom reinforcing beam connected to the frame. The cold plate includes a top plate and a bottom plate. A heat exchange medium flow channel and a sealing fitting part are provided between the top plate and the bottom plate. A protruding structure protruding away from the top plate is provided on the bottom plate at the sealing fitting part. A fastener cavity for accommodating fasteners is formed between the protruding structure and the top plate. A bottom plate connecting part corresponding to the fastener cavity is provided on the bottom reinforcing beam. The bottom plate and the bottom plate connecting part are fixedly connected by fasteners provided in the fastener cavity.

[0012] Beneficial effects of the battery pack: The battery pack of this utility model is an improved invention. Specifically, in this battery pack, the battery box tray has a fastener cavity provided on the sealing and fitting part of its cold plate bottom plate. Since the fastener cavity is located in the sealing and fitting part, it is surrounded by the fitting parts of the top and bottom plates of the cold plate, thus not affecting the sealing performance of the cold plate and the battery box. By providing the fastener cavity, the bottom plate and the bottom reinforcing beam can be fixedly connected together by fasteners without affecting the flatness of the top surface of the cold plate, thereby forming an integral structure of the cold plate, frame, and bottom reinforcing beam, achieving higher mechanical strength.

[0013] The energy storage platform of this utility model adopts the following technical solution:

[0014] An energy storage platform includes a cabin containing a battery cluster support. A battery pack is mounted on the battery cluster support. The battery pack includes a housing, which includes a battery box tray and a cover. The battery box tray includes a frame, a cold plate connected to the frame, and a bottom reinforcing beam connected to the frame. The cold plate includes a top plate and a bottom plate. A heat exchange medium flow channel and a sealing fitting portion are provided between the top plate and the bottom plate. A protruding structure protruding away from the top plate is provided on the bottom plate at the sealing fitting portion. A fastener cavity for accommodating fasteners is formed between the protruding structure and the top plate. A bottom plate connecting portion corresponding to the fastener cavity is provided on the bottom reinforcing beam. The bottom plate and the bottom plate connecting portion are fixedly connected by fasteners provided in the fastener cavity.

[0015] Beneficial effects of the energy storage platform: The energy storage platform of this utility model is an improved invention. Specifically, the energy storage platform of this utility model improves the structure of the battery pack. In the battery pack, the battery box tray has a fastener cavity set on the sealing and fitting part of its cold plate bottom plate. Since the fastener cavity is located in the sealing and fitting part, it is surrounded by the sealing and fitting parts of the top and bottom plates of the cold plate, thus not affecting the sealing performance of the cold plate and the battery box. By setting the fastener cavity, the bottom plate and the bottom reinforcing beam can be fixedly connected together by fasteners without affecting the flatness of the top surface of the cold plate, thereby forming an integral structure of the cold plate, frame and bottom reinforcing beam, and obtaining higher mechanical strength. Attached Figure Description

[0016] Figure 1 This is a perspective view of one embodiment of the battery box tray;

[0017] Figure 2 yes Figure 1 A bottom view of the battery compartment tray;

[0018] Figure 3 It is a partial longitudinal section view (oblique downward view) of the connection between the bottom reinforcing beam and the cold plate.

[0019] Figure 4 It is a partial longitudinal section view (oblique upward view) of the connection between the bottom reinforcing beam and the cold plate.

[0020] Figure 5 It is a partial longitudinal section view (from a head-up perspective) of the connection between the bottom reinforcing beam and the cold plate.

[0021] Figure 6 yes Figure 2 A three-dimensional view of the longitudinal beams in the middle;

[0022] Figure 7 yes Figure 6Top view of the longitudinal beam in the middle;

[0023] Figure 8 yes Figure 7 AA section view;

[0024] Figure 9 This is an exploded view of one embodiment of the battery pack;

[0025] Figure 10 This is a structural diagram of one embodiment of an energy storage platform (only one battery pack is shown in the diagram for easy viewing).

[0026] In the diagram: 1. Bottom reinforcing beam; 101. Bottom plate connection; 102. Bottom plate supporting beam; 103. Rounded edge; 104. Longitudinal beam; 105. Crossbeam; 2. Module beam; 3. Battery module; 4. Frame; 5. Connection between bottom reinforcing beam and frame; 6. Cold plate; 601. Top plate; 602. Bottom plate; 603. Sealing and fitting part; 604. Heat exchange medium flow channel; 605. Inlet connector; 606. Outlet connector; 607. Fastener cavity; 608. Protrusion; 609. Stopping plane; 7. Battery cluster bracket; 8. Fastener; 10. Battery pack; 1001. Battery box tray; 1002. Box cover. Detailed Implementation

[0027] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0028] In the battery compartment tray, such as Figures 1-2 As shown, the bottom reinforcing beam 1, together with the frame 4 and the module beam 2, mainly bears the weight of the battery module 3. In the existing structure, since the bottom reinforcing beam 1 is only welded and riveted to the frame 4 at its end (when the module beam is close to the frame, it can usually be considered as part of the frame), the number of connection points is small. When the battery module 3 is heavy, the connection point 5 between the bottom reinforcing beam 1 and the frame 4 is prone to weld failure during transportation, resulting in poor overall mechanical strength of the tray-type battery box. The cold plate 6, as an essential component of the battery box tray, is located adjacent to the bottom reinforcing beam 1 and has a certain strength. If the bottom reinforcing beam 1 and the cold plate 6 can be connected to form an integral structure without affecting the sealing of the cold plate 6 and the battery box, the overall mechanical strength of the battery box tray can be greatly increased. This utility model proposes a technical solution for a battery box tray, a battery box, and an energy storage platform based on the above inventive concept.

[0029] Based on the above inventive concept, a basic implementation of the battery box tray is as follows:

[0030] like Figures 1-2As shown, the battery box tray includes a frame 4, which has a rectangular structure. As the main load-bearing component of the entire battery box tray, the frame 4 needs to have a certain strength, and therefore is generally made of steel. For example, in one embodiment... Figure 1 , Figure 2 The frame 4 of the battery box tray shown is made of square steel tubing, and the joints of each side are fixed together by welding. However, those skilled in the art should understand that, provided the strength requirements are met, the frame 4 can also be made of other materials, and the connection methods between the various parts of the frame 4 can also be bolted, riveted, etc. Figure 1 , Figure 2 In the illustrated embodiment, the frame 4 is designed as a rectangular structure because the battery tray in this embodiment is a drawer-type tray, which is installed on the battery cluster bracket 7 in a pull-out manner during use (e.g., Figure 10 When the battery box is required to have a different shape in some scenarios, the border 4 can also be set to other corresponding shapes.

[0031] like Figures 1-5 As shown, a cold plate 6 is connected to the frame 4. The cold plate 6 forms the bottom plate of the battery box tray, which is used to fit against the bottom surface of the battery in the battery module 3, carrying away the heat generated during battery operation or heating the battery in operation to ensure that the battery operates within an appropriate temperature range. To ensure a certain thermal conductivity, the cold plate 6 is generally made of aluminum. As a typical structure, such as Figures 3-5 As shown, the cold plate 6 includes a top plate 601 and a bottom plate 602. The top plate 601 has a flat upper surface to facilitate better heat conduction through contact with the battery (including through adhesive contact). The top plate 601 and bottom plate 602 are partially bonded together, while the remaining portions are spaced apart, thus forming a sealed bonding portion 603 and a heat exchange medium flow channel 604 (formed at the gaps) between the top plate 601 and bottom plate 602. Specifically, the heat exchange medium flow channel 604 is defined by the sealed bonding portion 603. In use, a heat exchange medium (generally a liquid) is introduced into the inlet connector 605 of the heat exchange medium flow channel 604, allowing the heat exchange medium to flow through the channel and exit from the outlet connector 606, achieving heat exchange with the battery during the flow process. The edge of the cold plate 6 is the sealing and fitting part, which is fixedly connected to the frame 4 by fasteners. In one embodiment, the fastener is a rivet, which has the advantages of being quick and efficient. In other embodiments, the fastener can also be a bolt, screw, etc.

[0032] See Figures 1-5A bottom reinforcing beam 1 is provided on the underside of the cold plate 6. The bottom reinforcing beam 1 is fixedly connected to the frame 4, and together with the frame 4, they form the core component that supports the battery module 3. To ensure sufficient strength, the bottom reinforcing beam 1 is made of steel, and its specific structural form is not limited; for example, it can be a square steel beam, a steel pipe beam, or a plate beam, as long as it has sufficient strength. Considering the manufacturing process and stress characteristics of the bottom reinforcing beam, it can be a single structure or a structure composed of multiple connected segments. This should be understandable to those skilled in the art, and therefore will not be elaborated further.

[0033] like Figures 3-5 As shown above, the top plate 601 and bottom plate 602 of the cold plate 6 have a sealing and fitting part 603. The top plate 601 and bottom plate 602 are tightly attached to each other at the sealing and fitting part 603. Therefore, when the top plate 601 and bottom plate 602 are partially separated at the sealing and fitting part 603, and the boundary of the separation position is within the boundary of the sealing and fitting part 603 at that position, that is, the separated part does not penetrate the sealing and fitting part 603 in the horizontal direction, the space generated after the top plate 601 and bottom plate 602 are separated will not be connected to the heat exchange medium flow channel 604. At this time, the sealing performance of the cold plate can be maintained. Taking advantage of this characteristic of the cold plate 6, a protruding structure is provided on the bottom plate 602 at the sealing and fitting part 603, protruding away from the top plate 601. This protruding structure protrudes away from the top plate 601, thereby forming a fastener cavity 607 between the interior of the protruding structure and the top plate 601 to accommodate fasteners. After the fastener cavity 607 is formed by the above structure, when the fastener 8 is installed, the fastener 8 does not need to penetrate the top plate 601, thus allowing the upper surface of the top plate 601 to maintain its original shape and remain flat, without affecting the installation of the battery module 3. Based on this, a bottom reinforcing beam 1 is provided on the bottom plate connecting part 101 corresponding to the fastener cavity 607. The bottom plate 602 and the bottom plate connecting part 101 are fixedly connected by the fastener 8 provided in the fastener cavity 607. Since the top plate 601 and the bottom plate 602 often have a large bonding force at the sealing and fitting part 603, the fastener 8 will not pull the top plate 601 and the bottom plate 602 apart at the sealing and fitting part 603. Of course, in actual production, in order to ensure absolute reliability and further prevent the above-mentioned "pulling apart" phenomenon from occurring, a reinforcement structure can be provided around the fastener 8 at the sealing and fitting part 603. For example, the sealing and fitting part 603 can be reinforced by spot welding to prevent the top plate 601 and the bottom plate 602 from being pulled apart at this point, which would cause leakage of the heat exchange medium flow channel 604.

[0034] After the base plate 602 is connected to the base plate connection part 101 by the fastener 8, that is, after the base plate 602 is connected to the bottom reinforcing beam 1, the frame 4, the cold plate 6 and the bottom reinforcing beam 1 can form an integrated structure, so that the above components support each other and the overall mechanical strength of the battery box tray can be increased.

[0035] Based on the above embodiments, as a preferred embodiment, the protruding structure is a dispersed protrusion 608 corresponding one-to-one with the fastener 8. The main function of the protruding structure is to create space to avoid the fastener 8, that is, to form the fastener cavity 607. Therefore, in practice, the protruding structure can also be a long strip corresponding to multiple fasteners, or the protruding structure can be a combination of dispersed protrusions corresponding one-to-one with fasteners and long strips corresponding to multiple fasteners. For example, when the bottom plate connection part 101 of the bottom reinforcing beam 1 is distributed along its longitudinal direction, and the sealing and fitting part where the protruding structure is located also extends longitudinally, the protruding structure can naturally be a longitudinally extending, continuous or intermittent long strip. However, considering that the larger the area of ​​the protruding structure, the more the sealing area of ​​the sealing and fitting part 603 at the corresponding position will be squeezed out, and the larger the area of ​​the protruding structure, the smaller its overall rigidity will become. Therefore, setting the protruding structure as a distributed protrusion 608 that corresponds one-to-one with the fastener 8 can minimize the area of ​​the protruding structure, reduce its adverse effect on the sealing performance of the cold plate 6, ensure its rigidity, and improve the reliability of the connection.

[0036] The protrusion 608 is generally formed by stamping, so it can be an inverted conical structure. It only needs to ensure that the through hole at the lower end can stop and engage with the corresponding part of the fastener 8 to prevent the fastener 8 from coming off the protrusion. However, to prevent the fastener 8 from tearing (e.g., cracking) the protrusion 608 axially, this structure requires the wall of the protrusion 608 to have a certain thickness to ensure its structural strength. This, in turn, requires the bottom plate 602 of the cold plate 6 to have a certain thickness, which contradicts the trend of pursuing high energy density in battery boxes. Therefore, in a preferred embodiment, such as... Figures 3-5 As shown, the inner side of the protrusion 608 is provided with a stop surface 609 for engaging with a fastener to prevent the fastener from coming out. This stop surface can be formed simultaneously with the protrusion 608. Through the engagement of the stop surface 609 with the fastener 8, the force applied by the fastener 8 to the protrusion 608 is perpendicular to the stop surface 609 and acts on the stop surface, which can achieve a very good effect of preventing the protrusion 608 from being torn.

[0037] exist Figures 3-5In the illustrated embodiment, the convex 608 is generally shaped like a frustum of a cone. However, based on the function of the convex 608 in this invention, those skilled in the art should understand that in other embodiments, the convex 608 can also be shaped like a frustum of a pyramid, a hemisphere, or a truncated cylinder. However, when it is a truncated cylinder, the lower end of the convex 608 needs to have a flange extending towards the center to allow it to engage with the fastener 8. In fact, the shape of the convex 608 can be arbitrary, as long as it provides a fastener cavity to accommodate the fastener 8.

[0038] like Figure 2 As shown, in order to reduce the accuracy requirements for the installation position of the bottom reinforcing beam 1 and make it easier for the protrusion 608 to align with the bottom plate connection part 101 of the bottom reinforcing beam 1, in a more preferred embodiment based on the above implementation, the projection of the stop plane 609 in the vertical direction is located within the projection of the bottom plate connection part 101 to which it is connected in the vertical direction. In the manufacturing process of the battery box tray, precise positioning of the bottom reinforcing beam 1 is not impossible and is relatively easy to achieve. Therefore, in other embodiments, the above-mentioned size relationship can be interchanged; here, it is emphasized that the projection of the stop plane 609 in the vertical direction is located within the projection of the bottom plate connection part to which it is connected in the vertical direction, that is, emphasizing that the stop plane is small and the bottom plate connection part is large, still mainly considering the factor of minimizing the impact on the sealing performance of the cold plate 6. Of course, as an optional implementation, the projection of the stop plane in the vertical direction can also only partially overlap with the projection of the bottom plate connection part in the vertical direction, and the overlap area is sufficient for arranging fasteners.

[0039] Considering that excessively dense protrusions 608 will affect the arrangement of the heat exchange medium flow channel 604 and unnecessarily increase the number of fasteners 8, when the number of fasteners 8 reaches a certain level, it may even damage the original structural strength of the base plate 602 and the bottom reinforcing beam 1. Conversely, if the number of protrusions 608 is too small and the number of fasteners 8 is insufficient, the connection between the base plate 602 and the bottom reinforcing beam 1 will face instability. Therefore, based on the above embodiments, as a preferred embodiment, such as... Figure 2 As shown, the distance L1 between adjacent convex bulges arranged along the same bottom reinforcing beam 1 is 3cm-30cm, for example, this distance can be 3cm, 10cm, 15cm, 25cm, 30cm, etc. After repeated research and verification, at this distance, the convex bulge 608 can well balance the heat exchange medium flow channel arrangement of the cold plate and the connection stability between the bottom plate 602 and the bottom reinforcing beam 1.

[0040] In order to control the impact of the convex bulge 608 on the sealing performance of the cold plate within a certain range, based on the above-described embodiments, as a preferred embodiment, such as... Figure 5As shown, the shortest distance L2 between the portion of the convex bulge 608 connected to the base plate 602 and the heat exchange medium flow channel 604 is 1 cm. For example, L2 can be set to 1 cm, 3 cm, etc., and can be selected according to the space conditions around the convex bulge. By limiting this distance, a certain width of sealing and fitting distance is ensured on the circumference of the convex bulge 608, thereby ensuring the sealing performance of the cold plate 6.

[0041] Although the flatness requirement for the outer bottom of the battery box tray is relatively low, the potential problems arising from the exposed fastener 8 protruding from the bottom reinforcing beam 1 should be considered. Figures 3-8 As shown, based on the above-described embodiment, in a preferred embodiment, the bottom plate connecting portion 101 of the bottom reinforcing beam 1 protrudes towards the corresponding raised structure to form a recess for concealing the lower end of the corresponding fastener 8. This recess can be formed by machining methods such as stamping. Its shape and size only need to ensure that it does not interfere with the fastener 8. To achieve the function of concealing the fastener 8, the depth of the recess should not be less than the length of the exposed portion of the fastener 8; specifically, it can be equal to or greater than this length.

[0042] In the prior art, the heat exchange medium flow channel 604 of the cold plate 6 can be formed either by providing a recessed groove on the bottom plate 602 or by providing an upwardly protruding portion on the top plate 601. To ensure a more ideal flatness on the upper surface of the cold plate 6, based on the above embodiments, as a preferred embodiment, such as... Figures 1-5 As shown, the heat exchange medium flow channel 604 is formed by a recessed groove on the base plate 602. Furthermore, the protrusion height of the bulge 608 is less than the height from the top surface of the base plate 602 to the bottom surface of the groove. Therefore, it can prevent the lower end of the fastener 8 from protruding beyond the bottom surface of the bottom reinforcing beam 1 over a wider height range. This increases the height of the area where battery modules can be arranged without affecting the overall height of the battery box, thereby improving energy density. Figure 5 As shown, in specific practice, the height difference H1 between the protrusion height of the convex bulge 608 and the height from the top surface of the base plate 602 to the bottom surface of the groove is preferably 0.3cm-2cm.

[0043] After the bottom reinforcing beam 1 is connected to the partially sealed joint of the base plate 602, the overall strength of the battery box tray will be greatly improved. Based on this, if further improvement is desired, the unconnected sealed joint 603 can be reinforced by supporting it. Based on this concept, and building upon the above-described embodiment, as a preferred embodiment, such as... Figures 3-8As shown, the bottom reinforcing beam 1 has bottom plate connecting portions 101 on both sides in the width direction, and a bottom plate supporting beam 102 that protrudes upward to support the corresponding sealing and fitting portion is also provided between the bottom plate connecting portions 101. When this structure is adopted, the bottom reinforcing beam 1 is required to have a certain width, which can be achieved as follows: Figures 5-8 As shown, the bottom reinforcing beam 1 is designed as a plate beam. The aforementioned bottom plate supporting beam 102 is obtained by stamping and shaping the bottom reinforcing beam 1. Simultaneously, the forming of the bottom plate supporting beam 102 also improves the longitudinal strength of the bottom reinforcing beam 1. Of course, in some other embodiments, the bottom plate supporting beam 102 can also be formed by welding steel pipes onto the bottom reinforcing beam 1. This should be understood by those skilled in the art and will not be elaborated upon here.

[0044] As a further optimization of the above-described embodiments, such as Figures 3-5 As shown, the bottom reinforcing beam 1 can also support the bottom surface of the heat exchange medium flow channel 604, thereby further strengthening the overall strength of the battery box tray. Of course, this is only a preferred embodiment and is not necessary to solve the problems proposed by this utility model.

[0045] When a base plate supports the protruding beam 102, as a further preferred embodiment, such as... Figure 5 As shown, in the direction perpendicular to the extension direction of the supported sealing part, the fit width L3 between the bottom plate supporting beam 102 and the supported sealing part is 1cm-10cm, for example, it can be 1cm, 2cm, 5cm, 8cm, 10cm, etc., which can be selected according to the actual space conditions. Since if the fit width is too wide, it will encroach on the area of ​​the heat exchange medium flow channel 604 inside the cold plate 6, and if the fit width is too narrow, it will not provide good support. By designing the fit width between the bottom plate supporting beam and the supported sealing part, the arrangement of the heat exchange medium flow channel 604 of the cold plate and the effect of support and reinforcement can be taken into account. In order to prevent the bottom plate supporting beam 102 from cutting the bottom plate 602 with sharp edges, as a further preferred embodiment, the edge of the bottom plate supporting beam 102 at the fit with the bottom plate is a rounded edge 103. That is, the edge at the junction between its top surface and side surface is a rounded edge.

[0046] Considering the potential for vibration and friction between the base plate supporting the protruding beam 102 and the base plate 602 of the cold plate, as a preferred embodiment based on the above-described implementation, a buffer pad (not shown in the figure) is provided between the top surface of the base plate supporting the protruding beam 102 and the base plate 602. The buffer pad effectively protects the mating area between the two, preventing wear at the mating point. Furthermore, in actual production, gaps may occur between the top surface of the base plate supporting the protruding beam 102 and the base plate 602 due to tolerances; the buffer pad also ensures the supporting effect.

[0047] The structure of the bottom reinforcing beam 1 can be designed according to needs. For example, it can only use a longitudinal beam 104 located in the middle of the battery box tray, or only use a transverse beam 105 located on the battery box tray, or it can be divided into a transverse beam and a longitudinal beam, with the transverse beam 105 and the longitudinal beam 104 combined. Based on the above embodiments, as a preferred embodiment, the bottom reinforcing beam is divided into a transverse beam 105 and a longitudinal beam 104, which are arranged in a fishbone shape. Both the transverse beam and the longitudinal beam are connected to the base plate 602. The two ends of the longitudinal beam 104 are fixedly connected to the frame, and the connection method can be a combination of riveting and welding. One end of the transverse beam 105 is fixedly connected to the longitudinal beam 104, and the connection method can be riveting, welding, etc. The other end is fixedly connected to the frame, and the connection method can also be a combination of riveting and welding.

[0048] In this invention, the base plate 602 and the bottom reinforcing beam 1 are connected by fasteners 8. Considering ease of assembly, as a preferred embodiment, the fastener 8 is a rivet or a bolt. When the fastener is a rivet, it can be quickly installed using a rivet gun; specifically, the rivet can be a rivet nut, etc. When the fastener 8 is a bolt, the nut can be directly encapsulated in the corresponding fastener cavity during cold-forming of the sheet metal. Later, when installing the bottom reinforcing beam, the inserted bolt can be engaged with the nut to connect the base plate and the bottom reinforcing beam.

[0049] The specific implementation method of the battery pack of this utility model is as follows:

[0050] like Figure 9 As shown, the battery pack 10 includes a housing, which includes a battery box tray 1001 and a box cover 1002. The battery box tray 1002 is the battery box tray of this utility model, and its specific structure can be referred to the specific implementation of the battery box tray. The structure of the box cover 1002 is the prior art and will not be described in detail here.

[0051] The specific implementation method of the energy storage platform of this utility model is as follows:

[0052] like Figure 10As shown, the energy storage platform includes a cabin (not shown in the figure), in which a battery cluster support 7 is provided, and a battery pack 10 is installed on the battery cluster support 7. The battery pack 10 is the battery pack of this utility model, and its structure can refer to the implementation method of the battery pack of this utility model. The battery pack 10 is installed on the battery cluster support using a drawer-type structure. This installation structure is prior art and will not be described in detail here.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A battery case tray comprising a frame, a cold plate connected to the frame, and a bottom reinforcement beam connected to the frame, the cold plate comprising a top plate and a bottom plate, a heat exchange medium flow path and a seal fitting portion that fits to each other being provided between the top plate and the bottom plate, characterized in that, The base plate has a protruding structure at the sealing and fitting part that protrudes away from the top plate. The interior of the protruding structure and the top plate form a fastener cavity for accommodating fasteners. The bottom reinforcing beam has a base plate connecting part corresponding to the fastener cavity. The base plate and the base plate connecting part are fixedly connected by fasteners provided in the fastener cavity.

2. The battery box tray of claim 1, wherein, The protruding structure consists of dispersed protrusions that correspond one-to-one with the fasteners.

3. The battery box tray of claim 2, wherein, The inner side of the convex bulge is provided with a stop plane for engaging with a fastener stop to prevent the fastener from coming out.

4. The battery box tray of claim 2, wherein, The distance between adjacent convex bulges arranged along the same bottom reinforcing beam is 3cm-30cm.

5. The battery box tray according to any one of claims 1-4, characterized in that, The bottom plate connection of the bottom reinforcing beam protrudes towards the corresponding raised structure to form a groove for hiding the lower end of the corresponding fastener.

6. The battery box tray according to any one of claims 2-4, characterized in that, The shortest distance between the portion of the convex bulge connected to the base plate and the heat exchange medium channel is 1 cm.

7. The battery box tray according to any one of claims 2-4, characterized in that, The heat exchange medium flow channel is formed by a recessed groove provided on the base plate, and the protrusion height of the bulge is less than the height from the top surface of the base plate to the bottom surface of the groove.

8. The battery box tray according to any one of claims 1-4, characterized in that, The bottom reinforcing beam is provided with the bottom plate connecting part on both sides in the width direction, and a bottom plate supporting beam that protrudes upward to support the corresponding sealing and fitting part is also provided between the bottom plate connecting parts.

9. The battery box tray according to any one of claims 1-4, characterized in that, The bottom reinforcing beam supports the bottom surface of the heat exchange medium flow channel.

10. The battery box tray according to claim 8, characterized in that, In a direction perpendicular to the extension direction of the supported sealing part, the fit width between the bottom plate supporting the protruding beam and the supported sealing part is 1cm-10cm.

11. The battery box tray according to claim 8, characterized in that, The edge at the junction of the base plate supporting the convex beam and the base plate is a rounded edge.

12. The battery box tray according to claim 8, characterized in that, A buffer pad is provided between the top surface of the bottom plate supporting the convex beam and the bottom plate.

13. The battery box tray according to any one of claims 1-4, characterized in that, The bottom reinforcing beam is divided into a horizontal beam and a vertical beam, which are arranged in a fishbone shape. Both the horizontal beam and the vertical beam are connected to the bottom plate.

14. The battery box tray according to any one of claims 1-4, characterized in that, The fastener is a rivet or a bolt.

15. The battery box tray according to any one of claims 1-4, characterized in that, The protruding structure is a long strip-shaped protrusion corresponding to multiple fasteners.

16. The battery box tray according to any one of claims 1-4, characterized in that, The protruding structure includes dispersed protrusions corresponding one-to-one with fasteners and elongated protrusions corresponding to multiple fasteners.

17. A battery pack, comprising a housing and a battery assembly, said housing including a battery tray and a cover, characterized in that, The battery box tray is the battery box tray as described in any one of claims 1-16.

18. An energy storage platform, comprising a cabin, wherein a battery cluster support is disposed within the cabin, and a battery pack is disposed on the battery cluster support, characterized in that, The battery pack is the battery pack as described in claim 17.

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