Liquid cooling and heat preservation integrated box body

Abstract

The utility model relates to the technical field of battery packs, and discloses a liquid cooling and heat preservation integrated box body, which comprises a front panel, a rear panel, a left side beam, a right side beam and a plurality of bottom plates fixedly connected in a frame defined by the front panel, the rear panel, the left side beam and the right side beam, the interior of the bottom plate is divided by a middle partition plate to form a liquid cooling area located on the upper portion and a heat preservation area located on the lower portion, and heat preservation materials are encapsulated in the heat preservation area. In practical application, liquid cooling and heat preservation are integrated on the bottom plate, so that the liquid cooling and heat preservation integrated box body is formed, the production efficiency of the box body is effectively improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and particularly relates to a liquid-cooling and heat-insulating integrated box body. Background Art

[0002] Under the background of the rapid development of new energy vehicles and energy storage systems, as the core unit of energy storage, the performance and reliability of the battery pack are directly related to the overall performance of the equipment. It is necessary to protect the batteries in the battery system from external collisions and ensure that the batteries are within an appropriate temperature range so that the batteries can work properly.

[0003] Existing commercial vehicle battery packs generally adopt an integrated liquid-cooling box body, integrating liquid-cooling plates or liquid-cooling tubes in the bottom plate, and then setting a heat-insulating structure at the bottom of the bottom plate to achieve the heat insulation of the battery pack. The heat-insulating structure usually includes heat-insulating materials and a bottom guard plate; both the thermal management of the battery box body is realized and the mechanical protection performance of the box body is improved. The liquid-cooling and heat-insulating functions of the existing battery pack are achieved by the cooperation of multiple components. During the production process, due to the excessive number of components, the assembly relationship and complexity increase. To ensure the stability, sealing performance and comprehensive performance of the battery pack, it is necessary to strictly control the quality of each assembly relationship, resulting in low production efficiency and increased difficulty in achieving quality consistency.

[0004] At the same time, since the existing battery packs have multiple different models, the box bodies of different models of battery packs may require customized designs and components, making it difficult to carry out standardized production. During the production and use process, special stamping dies are required for parts such as the bottom guard plate, increasing the production cost of the battery box body and the overall battery pack.

[0005] In view of the above problems, the applicant provides a liquid-cooling and heat-insulating integrated box body to improve the production efficiency of the battery box body and reduce the production cost. Summary of the Utility Model

[0006] The utility model aims to provide a liquid-cooling and heat-insulating integrated box body to solve the problems of low production efficiency and high production cost of the existing battery box body.

[0007] To achieve the above object, the utility model adopts the following technical scheme: A liquid-cooling and heat-insulating integrated box body includes front and rear panels, left and right side beams, and multiple bottom plates fixedly connected within the frame formed by the front and rear panels and the left and right side beams. The interior of the bottom plate is a hollow structure, and an intermediate partition is provided inside it along the thickness direction. The interior of the bottom plate is divided by the intermediate partition into a liquid-cooling area located in the upper part and a heat-insulating area located in the lower part, and the heat-insulating area is filled with heat-insulating materials.

[0008] The principle and advantages of this solution are as follows:

[0009] 1. In actual application, compared with the existing battery pack box that requires multiple components to be combined together to achieve liquid cooling and heat preservation, this solution divides the inside of the one-piece bottom plate into a liquid cooling area and a heat preservation area by a partition, cancels the heat preservation cotton and bottom guard plate, and fills the heat preservation material in the heat preservation area instead of sticking the heat preservation cotton on the bottom of the bottom plate. This solution integrates the liquid cooling and heat preservation functions with the bottom plate, reduces the number of parts, simplifies some production processes, effectively improves production efficiency, saves the cost of the bottom guard plate and stamping die, and effectively reduces production costs.

[0010] 2. Compared with the existing box structure, this solution reduces the number of parts and components, which reduces the assembly relationship between the parts and components, reduces the complexity of production and assembly, and facilitates strict control of the overall structural stability and sealing of the battery pack box and the battery pack as a whole to achieve quality consistency; at the same time, each component in this solution can be formed by extrusion, reducing the production and use of different molds, which is conducive to the standardization of the production process.

[0011] 3. The combination of multiple components will lead to extra weight and occupy more space. The liquid cooling and heat preservation integrated box in this solution makes the battery pack structure more compact and improves the energy efficiency per unit density. The reduction in the weight of the battery pack can indirectly improve the endurance of electric vehicles, better meet consumers' demand for new energy vehicles, and effectively expand the market.

[0012] Furthermore, a plurality of vertical partitions are evenly arranged in the liquid cooling zone along the length direction of the bottom plate, and the vertical partitions divide the liquid cooling zone into a plurality of cooling channels, and the plurality of cooling channels in the same bottom plate are interconnected.

[0013] The design of the vertical partition not only guides the flow direction of the coolant, but also enhances the structural strength and stability of the bottom plate, preventing deformation or damage caused by external impact during transportation or installation, ensuring the sealing of the liquid cooling system and ensuring that the coolant will not leak.

[0014] Furthermore, both ends of the liquid cooling area of ​​the bottom plate are provided with concave mounting grooves, and the front and rear panels are provided with mounting protrusions at the corresponding positions of the mounting grooves on the side facing the bottom plate, and the mounting protrusions are inserted into the mounting grooves to realize the preliminary connection between the bottom plate and the front and rear panels.

[0015] The installation protrusion is inserted into the installation groove to realize the initial connection and fixation between the bottom plate and the front and rear panels, making the relative position of the two parts more stable during subsequent welding, ensuring the welding quality. At the same time, the butt installation of the installation groove and the installation protrusion increases the contact area between the bottom plate and the front and rear panels, and the welding area increases, making the connection between the bottom plate and the front and rear panels more stable.

[0016] Further, one end of the vertical partition facing the rear panel is located within the liquid cooling area. The installation groove near the rear panel is located between the end of the vertical partition and the rear panel, and a flow channel gap is provided between the bottom of the installation groove and the end of the vertical partition.

[0017] The above setting leaves a coolant flow channel at one end of the liquid cooling area facing the rear panel. This flow channel, together with the flow channels formed by adjacent vertical partitions, forms a U-shaped flow channel within the liquid cooling area. The coolant flows along a U-shaped path within the bottom plate, enabling a longer residence time during the flow process, increasing the heat exchange area and time with the battery, improving the heat exchange efficiency, and ensuring efficient heat dissipation.

[0018] Further, for the side walls of two adjacent bottom plates facing each other, the end face of one end of the side wall facing the rear panel is flush with the end face of the adjacent vertical partition, and the end face of the other end of the side wall protrudes towards the front panel and is located inside the bottom plate, protruding from the end face of the adjacent vertical partition.

[0019] The above setting causes the coolant within multiple bottom plates to flow towards one end located at the rear panel. The coolant all flows along a U-shaped path, increasing the heat exchange area and time, and ensuring efficient heat dissipation of the battery.

[0020] Further, the front and rear panels are L-shaped structures facing each other. Two independent cavities are provided inside the horizontal structure of the front panel. Round holes corresponding to the two cavities are opened on the upper wall of the horizontal structure. The two round holes are respectively an inlet and an outlet for the coolant to enter and exit. The installation protrusion of the front panel is provided with flow-through openings corresponding to the two cavities in the horizontal direction, and the cavities are connected to the liquid cooling area through the flow-through openings.

[0021] Designing both the inlet and outlet of the coolant on the front panel can enable the coolant to flow along a U-shaped path within the bottom plate, which is conducive to precisely controlling the flow rate and flow direction of the coolant. While ensuring the length and area of the heat exchange path, it reduces the complexity of the internal flow channel design. Moreover, the above setting facilitates later maintenance and repair. When the system needs to be cleaned, inspected, or parts replaced, the staff can quickly locate, reducing the impact on other parts of the battery pack and improving the maintenance efficiency.

[0022] Further, heat insulation materials are filled in the left and right side beams.

[0023] In addition to the heat insulation materials filled in the heat insulation area of the bottom plate, filling heat insulation materials in the left and right side beams forms a heat insulation barrier on the side of the battery pack box, effectively slowing down the direct impact of the external temperature on the battery performance, making the working temperature range of the battery more suitable, thereby improving the overall battery efficiency and lifespan. At the same time, the heat insulation materials also increase the structural strength of the side beams, improving the overall stability of the battery pack and reducing the risk of damage caused by external force impact or vibration.

[0024] Furthermore, sealing materials are provided at both ends of the heat preservation area for blocking the heat preservation area.

[0025] The reason for using the sealing material to block the heat preservation area is to prevent accumulated water from entering the heat preservation area and reducing the heat preservation performance of the heat preservation material.

[0026] Furthermore, sealing materials are installed at the joints of the bottom plate with the front and rear panels.

[0027] The above settings enhance the sealing performance of the liquid cooling system, effectively prevent the leakage of the coolant, and ensure the safety performance of the battery pack.

[0028] Furthermore, strengthening cross beams are provided on the horizontal structures of the front and rear panels.

[0029] The above settings enable the battery cell module to be installed between the two strengthening cross beams. The strengthening cross beams squeeze the battery cell module from both sides, increasing the fixing strength of the battery cell module in the box to enhance the stability of the internal connection structure of the battery pack. Description of the Drawings

[0030] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0031] Figure 2 is a schematic diagram of the structure of a single bottom plate of an embodiment of the present utility model.

[0032] Figure 3 is an internal schematic diagram of the liquid cooling area with three bottom plates of an embodiment of the present utility model assembled and the uppermost part of the structure removed.

[0033] Figure 4 is a schematic diagram of the structure of the front panel in an embodiment of the present utility model.

[0034] Figure 5 is Figure 4 a bottom view from the lower left perspective in

[0035] Figure 6 is a schematic diagram of the structure of the rear panel in an embodiment of the present utility model. Detailed Description of the Embodiment

[0036] The following is a further detailed description through specific embodiments:

[0037] The reference numerals in the accompanying drawings of the specification include: front panel 1, rear panel 2, left side beam 3, right side beam 4, bottom plate 5, middle partition 6, liquid cooling area 7, vertical partition 71, heat preservation area 8, installation groove 9, installation protrusion 10, inflow cavity 11, outflow cavity 12, inlet 13, outlet 14, strengthening cross beam 15, circulation port 16.

[0038] The embodiment is basically as shown in the attached Figures 1-6As shown: A liquid-cooled and heat-insulated integrated box body includes a front panel 1, a rear panel 2, a left beam 3, and a right beam 4. The front panel 1 and the rear panel 2 are L-shaped structures facing each other. Inside the frame formed by the front panel 1, the rear panel 2, the left beam 3, and the right beam 4, there are multiple bottom plates 5 installed. Between two adjacent bottom plates 5, and between the bottom plates 5 and the front panel 1, the rear panel 2, the left beam 3, and the right beam 4, they are all welded and fixed. The front panel 1, the rear panel 2, the left beam 3, the right beam 4, and the bottom plates 5 are all extrusion-molded. In this embodiment, there are three bottom plates 5, as Figure 2 shown. Each bottom plate 5 has the same structure. The inside of the bottom plate 5 is a hollow structure, and along its thickness direction, there is an intermediate partition 6 inside the bottom plate 5. The intermediate partition 6 divides the inside of the bottom plate 5 into a liquid-cooling area 7 located in the upper part and a heat-insulating area 8 located in the lower part. The heat-insulating area 8 is filled with a heat-insulating material, and the heat-insulating material is heat-insulating foam glue. After the heat-insulating foam glue cures, it expands and completely adheres to the intermediate partition 6 and the inner wall of the bottom plate 5. The heat-insulating foam glue has a good heat-insulating effect and is evenly distributed in the heat-insulating area 8, effectively ensuring the thermal uniformity at the bottom of the battery pack.

[0039] As Figures 2-4 and Figure 6 shown in combination, at both ends of the liquid-cooling area 7 of the bottom plate 5, there are concave installation grooves 9 opened. On the side of the horizontal structures of the front panel 1 and the rear panel 2 facing the bottom plate 5, at the positions corresponding to the installation grooves 9, there are outward protrusions formed as installation protrusions 10. The installation protrusions 10 are inserted into the installation grooves 9 to achieve the preliminary connection and fixation between the bottom plate 5 and the front panel 1 and the rear panel 2, making the relative positions of the two components more stable during subsequent welding, ensuring the welding quality. At the same time, the butt joint installation of the installation groove 9 and the installation protrusion 10 increases the contact area between the bottom plate 5 and the front panel 1 and the rear panel 2, and increases the welding area, making the connection between the bottom plate 5 and the front panel 1 and the rear panel 2 more stable.

[0040] As Figure 2 、 Figure 3 shown in combination, inside the liquid-cooling area 7 of the bottom plate 5, there are multiple vertical partitions 71 evenly arranged along the length direction of the bottom plate 5. In this embodiment, two vertical partitions 71 are arranged in each liquid-cooling area 7. The vertical partitions 71 divide the inside of the liquid-cooling area 7 into three cooling channels for the coolant to flow through. The multiple cooling channels in the same bottom plate 5 are interconnected; one end of the vertical partition 71 facing the rear panel 2 is located inside the liquid-cooling area 7. The installation groove 9 close to the rear panel 2 is located between the end of the vertical partition 71 and the rear panel 2, and there is a flow channel gap between the bottom of the installation groove 9 and the end of the vertical partition 71. At the same time, for the opposite side walls of two adjacent bottom plates 5, the end face of one end of this side wall facing the rear panel 2 is flush with the end face of the adjacent vertical partition 71, and the end face of the other end of this side wall facing the front panel 1 protrudes from the end face of the adjacent vertical partition 71 and is located inside the bottom plate 5. In this way, it is convenient for the coolant to flow in a U-shaped path inside the liquid-cooling area 7 of the bottom plate 5. Figure 3As shown by the dashed arrows in the figure, the U-shaped flow path of the coolant in the liquid cooling area 7 enables the coolant to have a longer residence time during the flow process, increasing the heat exchange area and time, improving the heat exchange efficiency, ensuring efficient heat dissipation. At the same time, the setting of the vertical partition 71 not only guides the flow direction of the coolant, but also enhances the structural strength and stability of the bottom plate 5, preventing deformation or damage caused by external force impact during transportation or installation, ensuring the sealing of the liquid cooling system, and ensuring that the coolant will not leak.

[0041] As Figure 4 , Figure 5 Combined as shown, two independent cavities are provided inside the horizontal structure of the front panel 1, which are the inflow cavity 11 and the outflow cavity 12 of the coolant respectively. The horizontal structure is provided with round holes corresponding to and communicating with the two cavities on its upper wall. The two round holes are the inlet 13 and the outlet 14 for the coolant to enter and exit respectively. The inlet 13 is communicated with the inflow cavity 11, and the outlet 14 is communicated with the outflow cavity 12 respectively. The mounting protrusion 10 of the front panel 1 is provided with a communication port 16 corresponding to and communicating with the two cavities in the horizontal direction. The communication port 16 communicates the liquid cooling area 7 with the inflow cavity 11 and the outflow cavity 12, realizing the flow of the coolant in the bottom plate 5 to cool the battery pack. Through the above settings, the coolant can flow along the U-shaped path in the bottom plate, which is beneficial to accurately control the flow rate and flow direction of the coolant, and is convenient for later maintenance and repair. When the system needs to be cleaned, inspected or components replaced, the staff can quickly locate.

[0042] To enhance the connection sealing between the bottom plate 5 and the front panel 1 and the rear panel 2, a sealing material is provided at the connection of the mounting groove 9 and the mounting protrusion 10; after the heat preservation area 8 is filled with heat preservation material, sealing materials are installed at both ends to block the heat preservation area 8, preventing external water from entering the heat preservation area 8 and affecting the heat preservation performance of the heat preservation material. Preferably, to enhance the overall heat preservation performance of the battery pack box body, the left beam 3 and the right beam 4 are also filled with heat preservation material.

[0043] As Figure 1 , Figure 4 and Figure 6 Combined as shown, the upper sides of the horizontal structures of the front panel 1 and the rear panel 2 are both installed with strengthening cross beams 15 of the same height. A plurality of convex platforms protruding towards each other are evenly provided on the side of the two strengthening cross beams 15 facing each other. The convex platforms divide the upper surface of the bottom plate 5 into a plurality of cell module installation areas. Through the above settings, when the cell modules are installed, the strengthening cross beams 15 squeeze the cell modules from both sides, enhancing the stability of the installation of the cell modules.

[0044] The above are only embodiments of the present utility model. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicability of the patent. The protection scope claimed in this application shall be subject to the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A liquid cooling and heat preservation integrated box, comprising front and rear panels and left and right side beams, and a plurality of bottom plates fixedly connected to a frame surrounded by the front and rear panels and the left and right side beams, characterized in that: The interior of the bottom plate is a hollow structure and a middle partition is arranged inside it along the thickness direction. The interior of the bottom plate is divided by the middle partition to form a liquid cooling area located at the top and a heat preservation area located at the bottom. Heat preservation material is filled in the heat preservation area.

2. The liquid cooling and heat preservation integrated box according to claim 1, characterized in that: A plurality of vertical partitions are evenly arranged in the liquid cooling zone along the length direction of the bottom plate. The vertical partitions divide the liquid cooling zone into a plurality of cooling channels. The plurality of cooling channels in the same bottom plate are interconnected.

3. The liquid cooling and heat preservation integrated box according to claim 2, characterized in that: Both ends of the liquid cooling area of ​​the bottom plate are provided with concave installation grooves, and the front and rear panels are provided with installation protrusions at the corresponding positions of the installation grooves on the side facing the bottom plate. The installation protrusions are inserted into the installation grooves to achieve preliminary connection between the bottom plate and the front and rear panels.

4. The liquid cooling and heat preservation integrated box according to claim 3, characterized in that: One end of the vertical partition facing the rear panel is located in the liquid cooling area, the mounting groove close to the rear panel is located between the end of the vertical partition and the rear panel, and a flow channel gap is provided between the bottom of the mounting groove and the end of the vertical partition.

5. The liquid cooling and heat preservation integrated box according to claim 4, characterized in that: For the side walls facing two adjacent bottom plates, the end surface of one end of the side wall facing the rear panel is flush with the end surface of the adjacent vertical partition, and the end surface of the other end of the side wall facing the front panel protrudes from the end surface of the adjacent vertical partition and is located inside the bottom plate.

6. The liquid cooling and heat preservation integrated box according to claim 5, characterized in that: The front and rear panels are L-shaped structures facing each other. Two independent cavities are arranged inside the horizontal structure of the front panel. Circular holes corresponding to the two cavities are opened on the upper wall of the horizontal structure. The two circular holes are the inlet and outlet for the coolant to enter and exit. The installation protrusion of the front panel is opened with flow ports corresponding to the two cavities in the horizontal direction. The connection between the cavity and the liquid cooling zone is achieved through the connecting ports.

7. The liquid cooling and heat preservation integrated box according to claim 6, characterized in that: The left and right beams are filled with insulation material.

8. The liquid cooling and heat preservation integrated box according to claim 7, characterized in that: Sealing materials for sealing the heat preservation zone are arranged at both ends of the heat preservation zone.

9. The liquid cooling and heat preservation integrated box according to claim 8, characterized in that: Sealing materials are installed at the connection between the bottom plate and the front and rear panels.

10. The liquid cooling and heat preservation integrated box according to claim 9, characterized in that: Reinforced cross beams are provided on the horizontal structures of the front and rear panels.

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