A new energy battery box structure

Abstract

This invention provides a new energy battery housing structure, belonging to the field of new energy power battery housing technology. It includes a flow channel plate housing, with a cooling channel at the bottom and a water-cooled plate base plate at the upper end. A bottom protective plate is located at the lower end of the flow channel plate housing. Water nozzles are laser-welded to the inlet and outlet of the cooling channel. The cooling channel includes a bottom shell and a liquid-cooled plate, with the liquid-cooled plate positioned on the bottom shell. The cooling channel is located between the water-cooled plate base plate and the bottom protective plate. Pressure, flow rate, and temperature changes are monitored in real time via inlet and outlet water nozzles and sensors, and feedback is sent to the BMS system to adjust flow distribution. This achieves an optimal balance between heat dissipation performance, temperature uniformity, and system flow resistance. The flow channel structure is directly integrated into the housing. Laser welding is lower in cost and more environmentally friendly than brazing. The flow channel structure is directly designed into the housing, optimizing the process and reducing the number of parts.

Description

Technical Field

[0001] This invention relates to the field of new energy power battery housing technology, specifically a new energy battery housing structure. Background Technology

[0002] The main components of a new energy power battery casing are the shell, water-cooling plate, water inlet, piping, bottom protective plate, and bottom protective plate reinforcing beam. The shell is constructed from extruded aluminum profiles welded together. The water-cooling plate is formed by brazing the water inlet, flow channel plate, and bottom plate together. The water-cooling plate and shell are bonded together using adhesive and FDS (Fluorescent Dioxide) processes. The bottom protective plate, reinforcing beam, and other parts are connected by fasteners. Currently, the shell is formed by arc welding, which results in unstable welding quality and dimensions, and the welds are prone to defects. The water-cooled plate is formed by brazing, which is not environmentally friendly and is costly. The entire enclosure manufacturing process is complex and involves many steps, resulting in a relatively high overall cost. Summary of the Invention

[0003] The purpose of this invention is to provide a new energy battery housing structure, which aims to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A new energy battery housing structure includes a flow channel plate shell, a cooling flow channel is provided at the bottom of the flow channel plate shell, a water-cooled plate bottom plate is provided at the upper end of the cooling flow channel, and a bottom protective plate is provided at the lower end of the flow channel plate shell. The inlet and outlet of the cooling flow channel are both laser-welded with water nozzles.

[0005] In a preferred embodiment of the present invention, the cooling channel includes a bottom shell and a liquid cooling plate. The liquid cooling plate is disposed on the bottom shell. The bottom plate of the water cooling plate is connected to the upper part of the bottom shell by laser welding. The bottom guard plate is press-fitted to the lower end of the channel plate shell. The cooling channel is located between the bottom plate of the water cooling plate and the bottom guard plate.

[0006] As a preferred embodiment of the present invention, the bottom protective plate is provided with two reserved holes, which are respectively adapted to the water nozzles at the inlet and outlet of the cooling channel.

[0007] As a preferred embodiment of the present invention, a bottom guard plate reinforcing beam is provided at the lower end of the bottom guard plate.

[0008] As a preferred embodiment of the present invention, the two ends of the bottom protective plate reinforcing beam are designed as irregular structures.

[0009] As a preferred embodiment of the present invention, a plurality of vehicle body connecting brackets are welded to the outer side of the flow channel plate housing.

[0010] As a preferred embodiment of the present invention, the surface of the bottom protective plate reinforcing beam is designed with concave and convex shapes.

[0011] Compared with existing technologies, the beneficial effects of this invention are: 1. Compared with the currently available extruded aluminum profile welded battery boxes, this box structure design adopts stamping plus laser welding, which has low equipment investment and high production efficiency; 2. The material is changed from extrusion to sheet metal stamping, which greatly improves material utilization and reduces costs; 3. Traditional liquid cooling plates are produced by stamping plus brazing, while this structure is changed to stamping plus laser welding, and the flow channel structure is directly integrated into the shell. Laser welding is cheaper and more environmentally friendly than brazing, and the flow channel structure is directly designed into the shell, optimizing the process and reducing the number of parts; 4. The bottom guard plate is connected to the shell by structural adhesive plus interference fit, and the bottom guard plate reinforcing beam is connected by fasteners, which facilitates later maintenance and disassembly. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a first-view overall exploded structural diagram of the present invention.

[0014] Figure 2 This is a second-view overall exploded structure diagram of the present invention.

[0015] In the diagram: 1. Flow channel plate shell; 101. Cooling flow channel; 101a. Bottom shell; 101b. Liquid cooling plate; 2. Water cooling plate bottom plate; 3. Bottom guard plate; 4. Water nozzle; 5. Bottom guard plate reinforcing beam; 6. Body connecting bracket. Detailed Implementation

[0016] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0017] Reference Figure 1 - Figure 2 This is the first embodiment of the present invention. This embodiment provides a new energy battery box structure, including a flow channel plate shell 1, a cooling flow channel 101 is provided at the bottom of the flow channel plate shell 1, a water-cooled plate bottom plate 2 is provided at the upper end of the cooling flow channel 101, a bottom guard plate 3 is provided at the lower end of the flow channel plate shell 1, and water nozzles 4 are laser-welded to the inlet and outlet of the cooling flow channel 101.

[0018] The water-cooled plate base plate 2 is formed by stamping and connected to the upper part of the flow channel plate shell 1 by laser welding. The bottom guard plate 3 is formed by stamping and has concave and convex shapes added to the surface to enhance strength. The bottom surface is coated with special materials for stone impact resistance and corrosion resistance. The protruding features of the flow channel plate shell 1 are coated with structural adhesive and then connected to the flow channel plate shell 1 by interference fit. This makes it easy to disassemble and does not damage the parts during subsequent maintenance.

[0019] Furthermore, two pre-drilled holes are provided on the bottom guard plate 3, which are adapted to the water nozzles 4 at the inlet and outlet of the cooling channel 101, respectively.

[0020] In addition, the two water nozzles 4 are precision machined and connected to the bottom of the flow channel plate housing 1 by laser welding through the reserved holes in the flow channel plate housing 1 and the bottom guard plate 3. The other end is designed with a quick-connect structure, which can be quickly connected to the external coolant system. The pressure, flow rate and temperature changes are monitored in real time through the inlet and outlet water nozzles and sensors, and the feedback is given to the BMS system to adjust the flow distribution.

[0021] Furthermore, the cooling channel 101 includes a bottom shell 101a and a liquid cooling plate 101b. The liquid cooling plate 101b is disposed on the bottom shell 101a. The water cooling plate bottom plate 2 is connected to the upper part of the bottom shell 101a by laser welding. The bottom guard plate 3 is press-fitted to the lower end of the channel plate shell 1. The cooling channel 101 is located between the water cooling plate bottom plate 2 and the bottom guard plate 3.

[0022] The flow channel plate shell 1 is formed by stamping. The cooling flow channel 101 is directly designed on the bottom of the flow channel plate shell 1. It is composed of two parts, the bottom shell 101a and the liquid cooling plate 101b, which are combined by welding or cold connection to become a whole part, reducing the number of parts and processes. Through CFD simulation, the length, width and shape of the flow channel are reasonably designed to achieve the best balance between "heat dissipation performance", "temperature uniformity" and "system flow resistance". The design of the flow channel also increases the strength of the bottom. The flow channel structure is directly integrated into the shell. Laser welding is cheaper and more environmentally friendly than brazing. The flow channel structure is directly designed on the flow channel plate shell 1, optimizing the process and reducing the number of parts.

[0023] Furthermore, a bottom guard plate reinforcing beam 5 is provided at the lower end of the bottom guard plate 3.

[0024] Furthermore, the surface of the bottom protective plate reinforcing beam 5 has a concave-convex shape.

[0025] Among them, the two bottom protective plate reinforcing beams 5 are formed by stamping. Through CAE simulation, special concave and convex shapes are added to the surface to enhance the structural strength.

[0026] Furthermore, the two ends of the bottom protective plate reinforcing beam 5 are designed as irregular structures.

[0027] The irregular structure allows the bottom protective plate reinforcing beam 5 to be more easily fixed to the shell with structural adhesive and fasteners, facilitating later disassembly and maintenance.

[0028] Furthermore, multiple body connecting brackets 6 are welded to the outer side of the flow channel plate housing 1.

[0029] Among them, the body connecting bracket 6 is formed by stamping and is connected to the flow channel plate shell 1 by welding. It is adjusted according to the overall vehicle structure design to meet the structural layout requirements of the whole vehicle and realize rapid connection.

[0030] During use, one end of the water nozzle 4 is connected to the inlet and outlet, and the other end of the water nozzle 4 is quickly connected to the external coolant system. The inlet and outlet water nozzles 4 and sensors monitor changes in pressure, flow rate and temperature in real time, and provide feedback to the BMS system to adjust the flow distribution. It can achieve the best balance between "heat dissipation performance", "temperature uniformity" and "system flow resistance". The flow channel structure is directly integrated into the housing. Laser welding is cheaper and more environmentally friendly than brazing. The flow channel structure is directly designed into the housing, optimizing the process and reducing the number of parts.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A new energy battery housing structure, characterized in that: include, The flow channel plate housing (1) has a cooling flow channel (101) at its bottom, a water-cooled plate bottom plate (2) at its upper end, and a bottom guard plate (3) at its lower end. The inlet and outlet of the cooling flow channel (101) are both laser-welded with water nozzles (4).

2. The new energy battery box structure according to claim 1, characterized in that: The cooling channel (101) includes a bottom shell (101a) and a liquid cooling plate (101b). The liquid cooling plate (101b) is disposed on the bottom shell (101a). The water-cooled plate bottom plate (2) is connected to the upper part of the bottom shell (101a) by laser welding. The bottom guard plate (3) is press-fitted to the lower end of the channel plate shell (1). The cooling channel (101) is located between the water-cooled plate bottom plate (2) and the bottom guard plate (3).

3. The new energy battery box structure according to claim 1, characterized in that: The bottom guard plate (3) has two reserved holes that are adapted to the water nozzles (4) at the inlet and outlet of the cooling channel (101).

4. The new energy battery box structure according to claim 1, characterized in that: The bottom end of the bottom guard plate (3) is provided with a bottom guard plate reinforcing beam (5).

5. The new energy battery box structure according to claim 4, characterized in that: The two ends of the bottom protective plate reinforcing beam (5) are designed as irregular structures.

6. The new energy battery box structure according to claim 1, characterized in that: Multiple vehicle body connecting brackets (6) are welded to the outer side of the flow channel plate housing (1).

7. The new energy battery box structure according to claim 4, characterized in that: The surface of the bottom protective plate reinforcing beam (5) is designed with concave and convex shapes.

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