CTB integrated die-casting vehicle body structure

Abstract

The utility model relates to a CTB integrated die-casting vehicle body structure, which belongs to the field of vehicle bodies of new energy vehicles and comprises a vehicle body chassis, a battery cell and a vehicle body floor. A concave structure is arranged in the middle of the vehicle body chassis; the plurality of battery cells are mounted in the downward concave structure; the vehicle body floor is mounted at the upper end of the concave structure; a liquid cooling channel is arranged in the vehicle body floor, a liquid cooling inlet and outlet connector communicated with the liquid cooling channel is arranged at one end of the upper portion of the vehicle body floor, and cooling liquid enters and exits the liquid cooling channel through the liquid cooling inlet and outlet connector. According to the utility model, vehicle body parts are reduced, the thickness of the vehicle body floor is reduced, the assembly process is simplified, and the vehicle body strength is high.

Description

Technical Field

[0001] The utility model relates to the field of new energy vehicle bodies, and in particular to a CTB integrated die-casting vehicle body structure. Background Art

[0002] With the rapid development of new energy vehicle technology, the downstream manufacturing process level is improving day by day. Its good ecological energy has formed a strong support for technological innovation, but there are still shortcomings, such as CTB (in the new energy vehicle industry, CTB is the abbreviation of Cell to Body, that is, the battery cell is directly integrated into the chassis technology to achieve the integrated design of the battery and the body) The body floor is removed or weakened, and the upper shell of the battery pack is used as the body floor. The CTB body removes the upper shell of the battery pack, and the lower tray is directly installed on the body chassis. The battery pack is installed on the lower tray, and the lower shell is installed under the lower tray. The lower shell is simplified into a flat sealing plate, that is, the lower shell does not bear weight. In addition, the CTB body is also equipped with a separate liquid cooling plate to dissipate heat for the battery pack, which requires a separate z-direction dimension, and there are the following problems:

[0003] 1) If the coolant inside the liquid cooling plate leaks, it will cause a short circuit risk to the battery pack;

[0004] 2) The liquid cooling plate increases the Z-direction dimension of the CTB body, resulting in a reduction in the interior space or insufficient ground clearance, increasing the risk of scraping the bottom of the vehicle during driving;

[0005] 3) The CTB body assembly process is complex. Utility Model Content

[0006] In order to solve the problems existing in the above-mentioned prior art, the utility model provides a CTB integrated die-cast body structure. In the traditional CTB body structure, the liquid cooling plate is integrated on the body floor, and the integrated die-casting technology is used as a support to form an integrated new energy vehicle body. It can improve the safety of the vehicle, reduce the space occupied by the body height, simplify the assembly process, increase the body strength, and improve the riding comfort in the vehicle, while maintaining the grouping efficiency of the CTB battery pack structure.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A CTB integrated die-casting body structure, the body structure comprises a body chassis, a battery cell and a body floor; the middle part of the body chassis has a concave structure;

[0009] A plurality of the battery cells are installed in the concave structure; the vehicle body floor is installed at the upper end of the concave structure;

[0010] A liquid cooling channel is arranged in the vehicle body floor, and a liquid cooling inlet and outlet interface communicating with the liquid cooling channel is arranged at one end above the vehicle body floor, and the coolant enters and exits the liquid cooling channel through the liquid cooling inlet and outlet interface.

[0011] Furthermore, a plurality of bosses are provided on the upper surface of the vehicle body floor.

[0012] Furthermore, the boss and the vehicle body floor are an integral die-casting.

[0013] Furthermore, the plurality of bosses are staggeredly arranged according to a trunk-branch structure.

[0014] Furthermore, the trunk-branch structure is a tree-shaped structure, a snake-shaped structure or an S-shaped structure.

[0015] Furthermore, the vehicle body structure also includes reinforcing ribs, and a plurality of the reinforcing ribs are respectively installed on the upper part of the vehicle body chassis above the vehicle body floor.

[0016] Furthermore, the vehicle body structure also includes a flat plate, which is installed on the vehicle body chassis above the reinforcing ribs to close the upper opening of the concave structure.

[0017] Furthermore, the liquid cooling inlet and outlet interface consists of a liquid inlet hole and a liquid outlet hole; the liquid cooling channel is connected to the cooling liquid supply device and the liquid storage tank through the liquid cooling inlet and outlet interface, and the cooling liquid supply device inputs the cooling liquid in the liquid storage tank into the liquid cooling channel, and the cooling liquid in the liquid cooling channel flows back to the liquid storage tank for heat dissipation.

[0018] Furthermore, the liquid inlet hole and the liquid outlet hole are respectively longitudinal through holes arranged at the center of the cylinder, and the longitudinal through holes are connected to the liquid cooling channel.

[0019] Beneficial effects of the utility model:

[0020] The utility model integrates the liquid cooling channel into the vehicle body floor through die-casting technology to form an integrated die-casting part. There is no need to set up a separate liquid cooling plate, which reduces the liquid cooling pipeline. The liquid cooling channel is not on the inside of the battery pack, and the liquid cooling inlet and outlet interface is set at one end above the vehicle body floor. Even if leakage occurs, it will not cause battery cell failure or short circuit, which greatly increases the safety performance of the battery and thus improves the safety of the car. At the same time, because the liquid cooling channel is integrated with the vehicle body floor, compared with the traditional vehicle body bottom height including the vehicle body floor thickness and liquid cooling plate thickness, the utility model only needs to ensure the thickness of the liquid cooling plate, so the thickness of the vehicle body floor can be reduced by 20-30mm, which can improve the space inside the car, increase the ride comfort inside the car, and increase the ground clearance of the battery cell, reduce the risk of the car bottom being scraped, and avoid irreversible damage to the battery cell.

[0021] The utility model simplifies the liquid cooling structure. During assembly, the coolant supply device and the liquid storage tank only need to be connected to the liquid cooling inlet and outlet interface pipelines, which reduces the assembly process of the liquid cooling structure, thereby simplifying the vehicle body assembly steps, improving the vehicle assembly efficiency and reducing the quality risk of the assembly process. At the same time, the material storage management, material transportation and material fixtures are reduced, which greatly reduces the production and assembly costs.

[0022] The utility model does not need to set up a separate liquid cooling plate, and adopts a concave structure on the vehicle body chassis instead of the battery pack shell, which reduces the number of battery pack parts, greatly simplifies the assembly process of the battery pack, improves the assembly efficiency, and provides support for carbon reduction of the OEM.

[0023] The utility model arranges the liquid cooling channel between the battery core and the passenger compartment, which can reduce electromagnetic interference and reduce the influence of electromagnetic radiation on the electrical appliances in the passenger compartment.

[0024] The utility model is made by die-casting technology. Compared with the stamping and welding body, the body structure is an integrated die-cast structure, the body structure is stronger, the splicing and welding or riveting connection process is reduced, the quality failure of the connection part is avoided, and the connection process cost is reduced.

[0025] The utility model further strengthens the vehicle body strength through bosses and reinforcing ribs to ensure stable operation of the new energy vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the CTB integrated die-casting body structure of the utility model without the flat plate installed;

[0027] Figure 2 This is a schematic diagram of the CTB integrated die-casting body structure of the utility model.

[0028] Among them: 100-liquid cooling inlet and outlet interface, 200-boss, 300-reinforcement rib, 400-flat plate. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present application, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] The terms such as up, down, left, right, front and back in this application document are based on the positional relationships shown in the drawings. If the drawings are different, the corresponding positional relationships may also change accordingly, so they cannot be understood as limiting the scope of protection.

[0031] In the present utility model, the terms "install", "connected", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection or mutual communication, a direct connection, an indirect connection through an intermediate medium, the internal connection of two components, or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] This embodiment describes a CTB integrated die-casting body structure, in which a liquid cooling plate is integrated on a body floor by using an integrated die-casting technology in a traditional CTB body structure to form an integrated new energy vehicle body.

[0033] The vehicle body structure includes a vehicle chassis, battery cells and a vehicle floor. Multiple battery cells are installed in a matrix in a concave structure in the middle of the vehicle chassis, and the vehicle floor is installed on the upper end of the concave structure by screws to seal the battery cells in the concave structure.

[0034] like Figure 1 As shown, a liquid cooling channel arranged according to a preset structure is provided in the vehicle body floor, and the liquid cooling inlet and outlet interface 100 of the liquid cooling channel is arranged at one end of the upper surface of the vehicle body floor, and is composed of a liquid inlet hole and a liquid outlet hole. The liquid cooling channel is connected to the coolant supply device and the liquid storage tank through the liquid cooling inlet and outlet interface 100, and the coolant supply device pumps the coolant in the liquid storage tank into the liquid cooling channel, and the coolant carries the heat and flows back to the liquid storage tank to dissipate heat, thereby realizing the circulation of the coolant in and out of the liquid cooling channel to achieve cooling and heat dissipation. Preferably, the liquid inlet and outlet holes are longitudinal through holes arranged in the center of the cylinder, and the longitudinal through holes are connected to the liquid cooling channel, which is convenient for connection with the coolant supply device pipeline. And because the position of the liquid cooling inlet and outlet interface 100 is arranged above the vehicle body floor in this embodiment, it can be ensured that even if the coolant leaks, it will not cause a short circuit of the battery cell, thereby improving the safety of the vehicle body.

[0035] The upper surface of the vehicle body floor of this embodiment is provided with a plurality of bosses 200, which are arranged in a staggered manner to improve the strength of the vehicle body floor. Preferably, the bosses 200 are arranged in a staggered manner in a trunk-branch structure according to the load-bearing requirements of the vehicle body, and the trunk-branch structure can be a tree-shaped structure, an S-shaped structure, etc. The bosses 200 can enhance the torsional rigidity and compression resistance of the vehicle body.

[0036] Preferably, in this embodiment, the boss 200 is integrated on the vehicle body floor, and the two are made into an integral die-casting part by a die-casting process. Compared with the production by various processes such as stamping and welding, this embodiment can not only improve production efficiency, but also help reduce product costs.

[0037] A plurality of reinforcing ribs 300 are provided above the vehicle body floor, and the two ends of the reinforcing ribs 300 are respectively mounted on the upper inner side of the concave structure of the vehicle body chassis to enhance the strength of the vehicle body and to support interior parts such as seats in the vehicle.

[0038] like Figure 2 As shown, above the reinforcing rib 300, a flat plate 400 is installed on the chassis of the vehicle body, closing the upper opening of the concave structure. The flat plate 400 is the contact surface between the battery cell and the passenger compartment, and realizes thermal management with the battery cell. The body floor dissipates heat for the battery cell through the liquid cooling channel, and can also effectively intervene in the temperature inside the passenger compartment, further increasing passenger comfort.

[0039] In this embodiment, the height of the vehicle body structure is reduced because the liquid cooling channel is integrated in the vehicle body floor. Compared with the traditional vehicle body floor, there is no need to set a separate liquid cooling plate, so the height of the vehicle body floor is reduced, and the thickness of the vehicle body floor can be reduced by 20-30mm, which can improve the space inside the vehicle and provide the occupants with a more reasonable and comfortable sitting posture. It can also increase the ground clearance of the battery cell to avoid unreasonable scratching of the chassis and causing irreversible damage to the battery cell.

[0040] Although the principle of the present invention is described in detail above in conjunction with the preferred embodiments of the present invention, those skilled in the art should understand that the above embodiments are merely explanations of the exemplary implementation of the present invention, and are not intended to limit the scope of the present invention. The details in the embodiments do not constitute limitations on the scope of the present invention. Without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformations and simple replacements based on the technical solution of the present invention fall within the scope of protection of the present invention.

Claims

1. A CTB integrated die-casting body structure, characterized in that: The vehicle body structure includes a vehicle body chassis, a battery cell and a vehicle body floor; the vehicle body chassis has a concave structure in the middle; A plurality of the battery cells are installed in the concave structure; the vehicle body floor is installed at the upper end of the concave structure; A liquid cooling channel is provided in the vehicle body floor, and a liquid cooling inlet and outlet interface (100) communicating with the liquid cooling channel is provided at one end above the vehicle body floor, wherein the liquid cooling inlet and outlet interface (100) is composed of a liquid inlet hole and a liquid outlet hole; the liquid cooling channel is connected to a cooling liquid supply device and a liquid storage tank through pipelines respectively via the liquid cooling inlet and outlet interface (100), the cooling liquid supply device inputs the cooling liquid in the liquid storage tank into the liquid cooling channel, and the cooling liquid in the liquid cooling channel flows back to the liquid storage tank for heat dissipation.

2. The CTB integrated die-casting vehicle body structure according to claim 1, characterized in that: The upper surface of the vehicle body floor is provided with a plurality of bosses (200).

3. The CTB integrated die-casting vehicle body structure according to claim 2, characterized in that: The boss (200) and the vehicle body floor are integrally formed as a die-cast part.

4. The CTB integrated die-casting vehicle body structure according to claim 2, characterized in that: The plurality of bosses (200) are staggeredly arranged in a trunk-branch structure.

5. The CTB integrated die-casting vehicle body structure according to claim 4, characterized in that: The trunk-branch structure is a tree-shaped structure or an S-shaped structure.

6. The CTB integrated die-casting vehicle body structure according to claim 1, characterized in that: The vehicle body structure further comprises reinforcing ribs (300), and a plurality of the reinforcing ribs (300) are respectively installed on the upper part of the vehicle body chassis above the vehicle body floor.

7. The CTB integrated die-casting vehicle body structure according to claim 6, characterized in that: The vehicle body structure further comprises a flat plate (400) which is mounted on the vehicle body chassis above the reinforcing rib (300) and closes the upper opening of the concave structure.

8. The CTB integrated die-casting vehicle body structure according to claim 1, characterized in that: The liquid inlet hole and the liquid outlet hole are respectively longitudinal through holes arranged at the center of the cylinder, and the longitudinal through holes are communicated with the liquid cooling channel.

Images