Liquid cooling plate welding process control method, liquid cooling plate structure, and battery pack

Abstract

A liquid cooling plate welding process control method, a liquid cooling plate structure, and a battery pack. The liquid cooling plate welding process control method is applied to a computer device (401). The computer device (401) is separately communicatively connected a laser welding device (402) and a monitoring device (403). The liquid cooling plate welding process control method comprises: receiving position information sent by the monitoring device (403) which is used for monitoring the position of a liquid cooling plate, and on the basis of the position information, identifying a plurality of welding positions; writing a laser filler wire welding movement path on the basis of the plurality of welding positions; and issuing a start instruction to the laser welding device (402), so that the laser welding device (402) sequentially welds components on the liquid cooling plate on the basis of the laser filler wire welding movement path, so as to form a liquid cooling plate structure.

Description

Liquid cooling plate welding process control methods, liquid cooling plate structure and battery pack Technical Field

[0001] This application relates to the field of new energy battery technology, and in particular to a method for controlling the welding process of a liquid cooling plate, a liquid cooling plate structure, and a battery pack. Background Technology

[0002] Currently, liquid cooling plate designs on the market generally suffer from structural complexity. Existing battery box liquid cooling system designs typically encapsulate the entire liquid cooling plate structure within the box along with the battery module to achieve effective thermal management of the battery pack. While this layout ensures a short heat conduction path, it places extremely high demands on the airtightness of the liquid cooling plate, requiring rigorous airtightness testing and increasing production costs. Due to the complex environment inside the battery box, a leak in the liquid cooling plate would have catastrophic consequences. As the core component of the battery box liquid cooling system, the liquid cooling plate has a complex structure, containing multiple connection points and sealing parts. Critical components, especially the inlet, outlet, and connecting pipes, are particularly susceptible to wear, aging, or sealing failure due to long-term exposure to high pressure, high temperature, and corrosive environments, leading to coolant leakage. Furthermore, the complex internal environment of the battery box contains numerous sensitive components such as battery cells, circuits, and connecting wires; even a minor leak could cause direct contact between the coolant and the battery cells. This not only leads to serious consequences such as short circuits and corrosion but also poses a serious threat to the safety and lifespan of the battery pack.

[0003] Secondly, due to the current design of battery boxes, the capacity of a single box is generally maintained at around 35 kWh, which is insufficient to meet the ever-increasing demand for longer driving range. The main reason for this limitation is the inefficient use of space inside the battery box. Specifically, since there are usually mounting points on both sides of the liquid cooling plate, these mounting points limit the usable space of the battery box, restrict the cell arrangement density and overall capacity, and thus limit the storage space for the cells.

[0004] Furthermore, the liquid cooling plate design in existing commercial vehicle battery boxes often prioritizes heat transfer efficiency, resulting in complex structures and large volumes, which in turn increases the demand for coolant. This not only increases the overall weight of the battery system, affecting the vehicle's energy efficiency ratio, but also increases manufacturing costs and maintenance difficulty. At the same time, while the extensive use of aluminum alloys and other metal materials improves structural strength and corrosion resistance, excessive use of aluminum alloys leads to increased material costs and resource consumption.

[0005] Furthermore, in the current manufacturing process of liquid cooling plates, traditional welding techniques often fall short when dealing with the complex structures of liquid cooling plates, especially when handling large gaps or delicate areas, making it difficult to ensure the stability of post-weld quality. This not only affects the overall performance of the liquid cooling plate but may also lead to leakage problems during subsequent airtightness testing due to welding defects, increasing the product's failure rate and maintenance costs.

[0006] Finally, traditional welding methods often fail to achieve ideal fusion when dealing with large void areas in liquid cooling plates. Defects such as porosity and slag inclusions are easily left in the weld, weakening its strength and posing potential risks during airtightness testing. Furthermore, traditional welding processes result in a large heat-affected zone, causing significant thermal damage to the base material and easily leading to deformation and residual stress accumulation in the welded components, further reducing product reliability and lifespan. Since liquid cooling plates must withstand high temperatures and pressures during operation, weak or defective welds can lead to coolant leakage, consequently affecting the safety and lifespan of the battery pack. Summary of the Invention

[0007] In view of the shortcomings of the prior art described above, the purpose of this application is to provide a liquid cooling plate welding process control method, liquid cooling plate structure and battery pack, to solve the technical problems in the prior art such as the difficulty in ensuring the quality stability of the welded liquid cooling plate when facing the complex structure of the liquid cooling plate, the safety hazards caused by the fact that the liquid cooling plate is prone to leakage inside the battery box, and the low single-box capacity.

[0008] To achieve the above and other related objectives, a first aspect of this application provides a liquid-cooled plate welding process control method, applied to a computer device. The computer device is communicatively connected to a laser welding device and a monitoring device. The liquid-cooled plate welding process control method includes: receiving position information sent by a monitoring device for monitoring the position of the liquid-cooled plate, and identifying several welding positions based on the position information; writing a laser filler wire welding movement path based on the several welding positions; and issuing a start command to the laser welding device, causing the laser welding device to sequentially weld each component on the liquid-cooled plate according to the laser filler wire welding movement path to form a liquid-cooled plate structure.

[0009] In some embodiments of the first aspect of this application, the computer device is also communicatively connected to a wire-filling device and a thermal imaging device; the method of sending a start command to the laser welding device, causing the laser welding device to sequentially weld each component on the liquid cooling plate according to the laser wire-filling welding movement path to form a liquid cooling plate structure, includes: sending a start command to the laser welding device, instructing the wire-filling device to perform a wire-filling operation on the welding area corresponding to the current welding position according to a preset wire feeding speed, a preset wire feeding amount, and the laser wire-filling welding movement path, and instructing the laser welding device to perform a welding operation on the current welding position of the liquid cooling plate; instructing the thermal imaging device to acquire a thermal image of the welding area corresponding to the current welding position, and adjusting the welding parameters of the laser welding device according to the acquired thermal image to complete the welding of the current welding position; repeating the above-mentioned wire-filling operation and welding operation to complete the welding of each welding position to form a liquid cooling plate structure.

[0010] In some embodiments of the first aspect of this application, the computer device is also communicatively connected to a welding positioning fixture, and the monitoring device is mounted on the welding positioning fixture; wherein, the method of receiving position information sent by the monitoring device for monitoring the position of the liquid cooling plate, and identifying several welding positions based on the position information includes: when the liquid cooling plate is detected to be located on the welding positioning fixture, instructing the monitoring device to collect the position information of the liquid cooling plate on the welding positioning fixture and send it to the computer device; identifying the coordinate information of each component on the liquid cooling plate based on the received position information; and identifying several welding positions based on preset welding rules and the coordinate information of each component on the liquid cooling plate.

[0011] To achieve the above and other related objectives, a second aspect of this application provides a liquid-cooled plate structure, manufactured according to the liquid-cooled plate welding process control method described above; the liquid-cooled plate structure is used for heat exchange with a battery box; the liquid-cooled plate structure includes: a cooling plate body, an inlet nozzle, and an outlet nozzle; wherein, the cooling plate body is provided with an installation space for mounting the battery box; the inlet nozzle and the outlet nozzle are both located at one end of the cooling plate body along its length direction and are both located outside the installation space; a flow channel for coolant circulation is provided inside the cooling plate body; the inlet nozzle and the outlet nozzle are respectively connected to the flow channel; the coolant enters the flow channel from the inlet nozzle and exchanges heat with the battery box, and then flows out from the outlet nozzle.

[0012] In some embodiments of the second aspect of this application, a plug is also included, the plug being disposed outside the mounting space.

[0013] In some embodiments of the second aspect of this application, a first limiting bracket and a second limiting bracket are further included, the first limiting bracket being fixed to one end of the cooling plate body along its length direction, and the second limiting bracket being fixed to the other end of the cooling plate body along its length direction.

[0014] In some embodiments of the second aspect of this application, a first protective plate and a second protective plate are also included, the first protective plate being fixed to one end of the cooling plate body along its width direction, and the second protective plate being fixed to the other end of the cooling plate body along its width direction; the first limiting bracket, the second limiting bracket, the first protective plate and the second protective plate together form the installation space.

[0015] In some embodiments of the second aspect of this application, the cooling plate body includes a first water channel plate and a second water channel plate connected to the first water channel plate; the flow channels are respectively disposed in the first water channel plate and the second water channel plate; the water inlet is disposed at one end of the first water channel plate along its length direction, and the water outlet is disposed at one end of the second water channel plate along its length direction.

[0016] In some embodiments of the second aspect of this application, the thickness of the upper and lower walls of the cooling plate body ranges from 1 mm to 1.5 mm, and the height of the flow channel ranges from 3.5 mm to 4 mm.

[0017] To achieve the above and other related objectives, a third aspect of this application provides a battery pack, comprising: a fixed frame; a battery box; a liquid cooling plate structure as described above, wherein the battery box is fixed in the mounting space of the liquid cooling plate structure; and a fixing part is provided at the bottom of the cooling plate body, through which the battery box is mounted on the fixed frame.

[0018] As described above, the liquid cooling plate welding process control method, liquid cooling plate structure, and battery pack of this application have the following beneficial effects:

[0019] The liquid-cooled plate welding process control method in this application receives position information sent by a monitoring device for monitoring the position of the liquid-cooled plate, and identifies several welding positions based on the position information; it then writes a laser wire-filling welding movement path based on the several welding positions; and sends a start command to the laser welding equipment, causing the laser welding equipment to sequentially weld each component on the liquid-cooled plate according to the laser wire-filling welding movement path to form a liquid-cooled plate structure. By receiving the position information sent by the monitoring device, accurately identifying the welding positions, and writing the laser wire-filling welding movement path, precise welding of complex liquid-cooled plate structures is achieved, improving welding accuracy and efficiency, with a high degree of automation, a small welding area, and no influencing factors such as porosity in the weld. Simultaneously, the manufacturing process is fast, saving time, shortening the production cycle, and improving production efficiency. This not only overcomes the limitations of traditional welding methods when dealing with large gaps but also greatly improves welding speed and quality. By precisely controlling the energy, movement path, and welding process of the laser beam, defects in the weld can be significantly reduced, improving the stability and reliability of the welding quality, ensuring the integrity and reliability of the liquid-cooled plate structure, thereby extending the product's service life and reducing the failure rate and maintenance costs. Furthermore, laser wire-filled welding technology offers high welding quality, aesthetically pleasing welds, and high strength, meeting the demands of high-precision and high-requirement welding. It also features high heat density and low heat input, significantly reducing the heat-affected zone, minimizing thermal damage to the base material, and reducing deformation and residual stress in welded components, thereby further improving product quality and reliability.

[0020] In this liquid-cooled plate structure, the coolant enters the flow channel through the inlet and exchanges heat with the battery box before flowing out through the outlet. Since both the inlet and outlet are located outside the mounting space for the battery box, even in the event of a leak, the coolant will not directly contact the battery cells, thus avoiding safety hazards such as short circuits and corrosion. This significantly reduces the risk of battery module malfunctions caused by coolant leakage, ensuring stable operation of the battery modules and minimizing damage and repair costs due to coolant leaks, as well as production losses caused by downtime, effectively controlling overall costs. Furthermore, when coolant leaks, because the leak point is located outside the battery box, maintenance personnel can more easily locate and repair the problem without disassembling the battery box or interfering with the normal operation of the battery modules. This simplifies the maintenance process, reduces maintenance costs, and minimizes battery module downtime due to maintenance. Finally, the liquid-cooled plate structure is lighter while ensuring sufficient mechanical properties, thereby reducing the use of metal materials such as aluminum alloys and the amount of coolant required for refrigeration, effectively reducing production costs.

[0021] In this application, the battery pack fixes the battery box to the mounting space of the liquid cooling plate structure, ensuring that neither the liquid cooling plate structure nor the mounting point of the battery box occupies the internal space of the battery box. This provides more storage space for the battery modules, allowing more battery modules to be installed within the same volume battery box, directly increasing the overall capacity of the battery pack. Furthermore, by placing the mounting point of the battery box at the bottom of the cooling plate body, the mounting space for the battery box in the liquid cooling plate structure can be increased, allowing for a larger battery box to be accommodated, further increasing the overall capacity of the battery pack and improving the driving range of the electric vehicle. Additionally, since the potential leakage points of the coolant in the liquid cooling plate structure are located outside the battery box, the impact of coolant leakage on the battery box is avoided, reducing malfunctions of the battery modules within the battery box caused by coolant leakage. Attached Figure Description

[0022] Figure 1 shows a flowchart of a liquid cooling plate welding process control method in one embodiment of this application.

[0023] Figure 2 shows a schematic flowchart of identifying the welding position in one embodiment of this application.

[0024] Figure 3 shows a schematic diagram of the laser filler wire welding process in one embodiment of this application.

[0025] Figure 4 shows a schematic block diagram of a liquid-cooled plate welding process control system in one embodiment of this application.

[0026] Figure 5 shows a schematic diagram of the liquid cooling plate structure in one embodiment of this application.

[0027] Figure 6 shows a side view of a liquid cooling plate structure in one embodiment of this application.

[0028] Figure 7 shows a partial structural schematic diagram of the liquid cooling plate structure in one embodiment of this application.

[0029] Figure 8 shows a schematic diagram of the installation space for battery box installation in a liquid cooling plate structure according to an embodiment of this application.

[0030] Figure 9 shows a schematic diagram of the bottom mounting points in a liquid cooling plate structure according to an embodiment of this application.

[0031] Component Labeling Explanation: 1. Cooling Plate Body; 11. First Water Channel Plate; 12. Second Water Channel Plate; 13. Flow Channel; 14. Fixing Hole; 2. Inlet Nozzle; 3. Outlet Nozzle; 4. Plug; 5. First Limiting Bracket; 6. Second Limiting Bracket; 7. First Protective Plate; 8. Second Protective Plate; 400. Liquid Cooling Plate Welding Process Control System; 401. Computer Equipment; 402. Laser Welding Equipment; 403. Monitoring Equipment. Detailed Implementation

[0032] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0033] Before providing a further detailed description of the present invention, the nouns and terms used in the embodiments of the present invention are explained, and the nouns and terms used in the embodiments of the present invention are subject to the following interpretations:

[0034] <1> TIG welding (Tungsten Inert Gas Welding): Non-consumable electrode inert gas shielded arc welding is an arc welding method that uses an externally supplied gas as a protective medium.

[0035] <2> MIG welding (Metal Inert Gas Welding) is an arc welding method that uses a consumable electrode and an external gas as the arc medium to protect the molten metal droplets, weld pool, and high-temperature metal in the weld zone.

[0036] To address the problems mentioned above, this invention provides a method for controlling the welding process of a liquid-cooled plate, a liquid-cooled plate structure, and a battery pack. The aim is to solve the technical problems of traditional welding processes in the prior art, such as difficulty in ensuring the quality stability of the welded liquid-cooled plate when dealing with its complex structure, the potential safety hazards caused by leaks in the liquid-cooled plate located inside the battery pack, and low single-pack capacity.

[0037] To facilitate understanding of the embodiments of this application, a detailed description will first be provided with reference to Figure 1. Figure 1 shows a schematic flowchart of the liquid-cooled plate welding process control method in an embodiment of the present invention. In this embodiment, the liquid-cooled plate welding process control method is applied to computer equipment, which is communicatively connected to laser welding equipment and monitoring equipment. The liquid-cooled plate welding process control method mainly includes the following steps:

[0038] S101: Receive position information sent by a monitoring device for monitoring the position of the liquid cooling plate, and identify several welding positions based on the position information.

[0039] In this embodiment, as shown in Figure 2, a flowchart illustrating the process of identifying welding positions is illustrated. The computer device is also communicatively connected to a welding positioning fixture, and the monitoring device is mounted on the welding positioning fixture. The method of receiving position information sent by the monitoring device for monitoring the position of the liquid cooling plate, and identifying several welding positions based on the position information, includes:

[0040] S1011: When the liquid cooling plate is detected to be located on the welding positioning fixture, the monitoring device is instructed to collect the position information of the liquid cooling plate on the welding positioning fixture and send it to the computer device.

[0041] In this embodiment, the welding positioning fixture is further equipped with a locking mechanism. The locking mechanism is communicatively connected to the computer device. When the liquid cooling plate is detected to be positioned on the welding positioning fixture, the locking mechanism clamps and fixes each component of the liquid cooling plate. Then, the monitoring device collects the position information of the liquid cooling plate on the welding positioning fixture and sends it to the computer device. The locking mechanism clamps and fixes each component of the liquid cooling plate, ensuring that the entire liquid cooling plate will not shift or deform during the welding process. This ensures the stability of the liquid cooling plate during welding, reduces welding defects (such as cracks and slag inclusions), and thus improves the overall welding quality.

[0042] S1012: Based on the received location information, identify the coordinate information of each component on the liquid cooling plate.

[0043] In this embodiment, the monitoring equipment includes, but is not limited to, industrial cameras, laser rangefinders, and displacement sensors. For example, the industrial camera can transmit the acquired position information to the computer device in real time, and use image processing algorithms, such as edge detection and contour extraction, to identify the features of each component on the liquid cooling plate. The computer device pre-creates template images of each component on the liquid cooling plate and matches these template images with the identified features. By calculating the similarity between the template images and the identified features, the position of each component can be determined, and the coordinate information of each component on the liquid cooling plate can be identified through coordinate transformation.

[0044] In this embodiment, during the welding process of the liquid-cooled plate, the laser rangefinder can accurately measure the position information of the liquid-cooled plate on the welding positioning fixture, thereby determining the position of the liquid-cooled plate. The computer device then identifies the coordinate information of each component on the liquid-cooled plate based on the received position information.

[0045] In this embodiment, during the welding process of the liquid cooling plate, a displacement sensor can be installed on the welding positioning fixture to measure the position information of the liquid cooling plate on the welding positioning fixture.

[0046] S1013: Based on the preset welding rules and the coordinate information of each component on the liquid cooling plate, identify several welding positions.

[0047] In this embodiment, the preset welding rules include, but are not limited to, welding type, welding parameters, welding sequence, and preset welding position. Based on the preset welding rules and the coordinate information of each component on the liquid cooling plate, the specific welding position is determined.

[0048] In this embodiment, the welding type is determined based on the material and thickness of the liquid cooling plate and the types of components to be connected, such as spot welding, seam welding, TIG welding, and MIG welding. The welding parameters include laser power, welding speed, wire feed speed, wire feed amount, welding distance, beam diameter, and focal point position. These parameters need to be adjusted according to the specific material and thickness of the liquid cooling plate and the welding position to ensure welding quality. In the initial welding stage, manual welding can be used, followed by pre-welding orthogonal experiments, airtightness testing, mechanical property observation, and macroscopic morphology observation to determine specific welding parameters. The welding sequence is determined based on the structure of the liquid cooling plate and welding requirements to avoid deformation or stress concentration during the welding process. The preset welding position is determined based on the welding type and parameters.

[0049] S102: Based on the aforementioned welding positions, write the laser filler wire welding movement path.

[0050] In this embodiment, based on the aforementioned welding positions, the specific coordinates of each welding point and the welding sequence are determined. The welding path is planned, and weld diagrams for all welds are drawn, including the start point, end point, turning point, and outline of each weld. Based on the weld diagrams, the welding path for each welding position is defined: for straight welds, the coordinates of the start and end points are directly input. For curved welds, a curve drawing tool in the software can be used, or a series of points can be input to approximate the curve. Wire feeding commands are set at each key point or interval of the welding path, including the start and end times of wire feeding, wire feeding speed, etc. Synchronization between the wire feeding commands and the laser welding commands is ensured to avoid welding defects. Each welding path is simulated to check its continuity and accuracy, ensuring smooth connection between each welding path and avoiding pauses and repetitions during the welding process. Based on the simulation results, the path points, wire feeding commands, and welding parameters are adjusted to generate a laser wire-filling welding movement path.

[0051] S103: Send a start command to the laser welding equipment, so that the laser welding equipment will sequentially weld each component on the liquid cooling plate according to the laser filler wire welding movement path to form a liquid cooling plate structure.

[0052] In this embodiment, as shown in Figure 3, a schematic diagram of the laser wire filler welding process in this embodiment of the invention is illustrated. The computer device is also communicatively connected to the wire filler device and the thermal imaging device; the method of sending a start command to the laser welding device, causing the laser welding device to sequentially weld each component on the liquid cooling plate according to the laser wire filler welding movement path to form the liquid cooling plate structure includes:

[0053] S1031: Send a start command to the laser welding equipment, and according to the preset wire feeding speed, preset wire feeding amount and laser filler welding movement path, instruct the filler equipment to perform filler operation on the welding area corresponding to the current welding position, and instruct the laser welding equipment to perform welding operation on the current welding position of the liquid cooling plate.

[0054] In this embodiment, at each welding position, the laser welding head of the laser welding equipment focuses and melts the base material, while the wire feeder simultaneously delivers welding wire to the welding area. The amount of welding wire fed is determined by the degree of protrusion of the welded surface and the overall forming quality, with the weld protrusion resembling a droplet shape. The welding wire melts under laser heating, achieving complete filling of the welding area and fusing with the base material to form a weld. The wire feeder operates synchronously with the laser welding equipment to ensure that the welding wire accurately fills the welding area and forms a good weld with the base material.

[0055] S1032: The thermal imaging device acquires a thermal image of the welding area corresponding to the current welding position, and adjusts the welding parameters of the laser welding device according to the acquired thermal image to complete the welding at the current welding position.

[0056] In this embodiment, the acquired thermal images are preprocessed, such as through noise reduction and contrast enhancement, to improve image quality and analytical accuracy. The temperature measurement function of the thermal imaging device is used to extract temperature distribution information of the welding area from the thermal images. Based on preset temperature thresholds or temperature gradient changes, a preset welding parameter adjustment strategy is formulated. For example, if the temperature of the welding area is detected to be too high, the laser power needs to be reduced or the welding speed increased to prevent overheating. The analyzed temperature distribution information is combined with the preset welding parameter adjustment strategy to adjust the welding parameters of the laser welding equipment in real time, such as laser power, welding speed, and wire feed speed.

[0057] In this embodiment, the thermal imaging device operates based on the phenomenon that all objects generate heat and radiate infrared radiation. By detecting the infrared radiation emitted by the object's surface, the thermal imaging device can convert it into a visible thermal image, thus visually displaying the temperature distribution of the object's surface. These images typically use different colors to represent different temperature ranges; for example, red and pink represent higher temperatures, while blue and green represent lower temperatures.

[0058] S1033: Repeat the above wire filling and welding operations to complete the welding at each welding position to form a liquid cooling plate structure.

[0059] In this embodiment, the above-described filling and welding operations are repeated. Following the welding sequence: First, the first water channel plate 11 and the second water channel plate 12 are welded together. Second, the plug 4 is welded to both ends of the cooling plate body 1 along its length. Third, the inlet nozzle 2 and the outlet nozzle 3 are welded to the cooling plate body 1. Fourth, the first limiting bracket 5 and the second limiting bracket 6 are welded to both ends of the cooling plate body 1 along its length. Fifth, the first protective plate 7 and the second protective plate 8 are welded to both ends of the cooling plate body 1 along its width, thus completing the welding at each welding position to form a liquid-cooled plate structure.

[0060] In this embodiment, the method further includes: performing an airtightness test on the liquid cooling plate structure to determine whether the welding quality of the liquid cooling plate structure is qualified.

[0061] In this embodiment, the computer device is also communicatively connected to a testing device, which includes a gas tank, a solenoid valve, and a pressure gauge. The solenoid valve and pressure gauge are communicatively connected to the computer device. The method for testing the airtightness of the liquid-cooled plate structure includes:

[0062] (1) Control the solenoid valve to open, so that the gas in the gas tank is automatically filled into the liquid cooling plate structure based on air pressure, and monitor the gas pressure value inside the liquid cooling plate structure through the pressure gauge. In this way, the gas pressure inside the liquid cooling plate structure is established.

[0063] (2) When the gas pressure value reaches the preset gas pressure parameter, the solenoid valve is controlled to close. In this way, the gas pressure inside the liquid cooling plate structure is ensured to reach a stable and measurable level.

[0064] (3) Monitor the gas pressure value within a preset time range using the pressure gauge, and determine whether the welding quality of the liquid cooling plate structure is qualified based on the monitoring results.

[0065] In this embodiment, a pressure gauge is used to monitor whether the gas pressure changes within a preset time range. If the gas pressure remains constant, it indicates that the welding quality of the liquid cooling plate structure is good and there is no leakage. If the gas pressure drops, it indicates that there is a leak and the welding quality is unacceptable.

[0066] The liquid-cooled plate welding process control method in this application receives position information sent by a monitoring device for monitoring the position of the liquid-cooled plate, and identifies several welding positions based on the position information; it then writes a laser wire-filling welding movement path based on the several welding positions; and sends a start command to the laser welding equipment, causing the laser welding equipment to sequentially weld each component on the liquid-cooled plate according to the laser wire-filling welding movement path to form a liquid-cooled plate structure. By receiving the position information sent by the monitoring device, accurately identifying the welding positions, and writing the laser wire-filling welding movement path, precise welding of complex liquid-cooled plate structures is achieved, improving welding accuracy and efficiency, with a high degree of automation, a small welding area, and no influencing factors such as porosity in the weld. Simultaneously, the manufacturing process is fast, saving time, shortening the production cycle, and improving production efficiency. This not only overcomes the limitations of traditional welding methods when dealing with large gaps but also greatly improves welding speed and quality. By precisely controlling the energy, movement path, and welding process of the laser beam, defects in the weld can be significantly reduced, improving the stability and reliability of the welding quality, ensuring the integrity and reliability of the liquid-cooled plate structure, thereby extending the product's service life and reducing the failure rate and maintenance costs. Furthermore, laser wire-filled welding technology offers high welding quality, aesthetically pleasing welds, and high strength, meeting the demands of high-precision and high-requirement welding. It also features high heat density and low heat input, significantly reducing the heat-affected zone, minimizing thermal damage to the base material, and reducing deformation and residual stress in welded components, thereby further improving product quality and reliability.

[0067] Figure 4 is a schematic block diagram of the liquid-cooled plate welding process control system provided in an embodiment of this application. As shown in Figure 4, the liquid-cooled plate welding process control system 400 includes a computer device 401, a laser welding device 402, and a monitoring device 403. The computer device 401 is communicatively connected to the laser welding device 402 and the monitoring device 403. The monitoring device 403 is used to collect the position information of the liquid-cooled plate, and the laser welding device 402 is used to sequentially weld various components on the liquid-cooled plate.

[0068] In this embodiment, the computer device 401 receives position information sent by the monitoring device 403 for monitoring the position of the liquid cooling plate, and identifies several welding positions based on the position information; it writes a laser filler wire welding movement path based on the several welding positions; and it sends a start command to the laser welding device 402, so that the laser welding device 402 welds each component on the liquid cooling plate sequentially according to the laser filler wire welding movement path to form a liquid cooling plate structure.

[0069] In this embodiment, the computer device is also communicatively connected to the welding positioning fixture, and the monitoring device 403 is mounted on the welding positioning fixture.

[0070] In this embodiment, the computer device 401 is also communicatively connected to a wire-filling device and a thermal imaging device; the method of sending a start command to the laser welding device 402, causing the laser welding device 402 to sequentially weld each component on the liquid cooling plate according to the laser wire-filling welding movement path to form the liquid cooling plate structure includes:

[0071] (1) Send a start command to the laser welding equipment 402, and according to the preset wire feeding speed, preset wire feeding amount and laser filler welding movement path, instruct the filler device to perform filler operation on the welding area corresponding to the current welding position, and instruct the laser welding equipment 402 to perform welding operation on the current welding position of the liquid cooling plate.

[0072] (2) The thermal imaging device acquires a thermal image of the welding area corresponding to the current welding position, and adjusts the welding parameters of the laser welding device 402 according to the acquired thermal image to complete the welding at the current welding position.

[0073] (3) Repeat the above-mentioned wire filling and welding operations to complete the welding of each welding position to form a liquid cooling plate structure.

[0074] It should be understood that the specific process of each module performing the above-mentioned steps has been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0075] As shown in Figures 5-8, this application also provides a liquid-cooled plate structure, which is formed according to the liquid-cooled plate welding process control method described above; the liquid-cooled plate structure is used for heat exchange with the battery box; the liquid-cooled plate structure includes: a cooling plate body 1, a water inlet 2, and a water outlet 3; wherein, the cooling plate body 1 is provided with an installation space for installing the battery box; the water inlet 2 and the water outlet 3 are both located at one end of the cooling plate body 1 along its length direction, and are both located outside the installation space; the cooling plate body 1 is provided with a flow channel 13 for coolant to flow; the water inlet 2 and the water outlet 3 are respectively connected to the flow channel 13; the coolant enters the flow channel 13 from the water inlet 2 and exchanges heat with the battery box, and then flows out from the water outlet 3.

[0076] In this embodiment, the liquid cooling plate structure of this application allows the coolant to enter the flow channel 13 through the inlet 2, exchange heat with the battery box, and then flow out through the outlet 3. Since both the inlet 2 and the outlet 3 are located outside the mounting space for the battery box, even if a leak occurs, the coolant will not directly contact the battery cells, thus avoiding safety hazards such as short circuits and corrosion. This significantly reduces the risk of battery module malfunctions caused by coolant leakage, ensuring stable operation of the battery modules and reducing damage and repair costs due to coolant leakage, as well as production losses caused by downtime, effectively controlling overall costs. Furthermore, when coolant leaks, because the leak point is located outside the battery box, maintenance personnel can more easily locate and repair the problem without disassembling the battery box or interfering with the normal operation of the battery modules. This simplifies the maintenance process, reduces maintenance costs, and minimizes battery module downtime due to maintenance.

[0077] In this embodiment, as shown in Figures 5-6, the liquid cooling plate structure further includes a plug 4, which is disposed outside the installation space. Thus, the plug 4 completely seals the flow channels 13 within the cooling plate body 1, allowing the coolant to flow smoothly within the flow channels 13 and preventing coolant leakage that could lead to a decrease in cooling efficiency.

[0078] In this embodiment, the cooling plate body 1 has a cavity and an inlet connecting to the cavity. The cavity is divided into flow channels 13 by multiple dividing ribs, and the plug 4 is disposed within the inlet. The cavity is divided into multiple flow channels 13 by the dividing ribs, with each flow channel 13 connected end-to-end. Coolant enters from the inlet 2, flows sequentially through each flow channel 13, and exits from the outlet 3, forming a complete closed-loop pipeline circulation with only one inlet and one outlet. This alters and optimizes the flow path and heat exchange efficiency of the coolant. By increasing the number of flow channels 13, the flow path of the coolant within the cooling plate body 1 is extended, allowing the coolant more time to exchange heat with the battery pack mounted on the cooling plate body 1. This helps the coolant absorb heat more fully during flow, thereby improving heat conduction efficiency and achieving efficient heat dissipation. If the plug 4 is damaged or leaks, maintenance personnel can quickly replace it through the inlet without disassembling the entire cooling plate body 1 or interfering with the normal operation of other components. In addition, since the plug 4 is located outside the mounting space used to install the battery box, even if a leak occurs, it will not directly affect the safety of the battery module.

[0079] In this embodiment, as shown in Figure 5, the inlets connecting the cavity are respectively located at both ends of the cooling plate body 1 along its length. The plugs 4 are fixed inside the inlets at both ends of the cooling plate body 1 by laser welding. Thus, the plugs 4, located inside the inlets, prevent coolant leakage from the inlets at both ends of the cooling plate body 1, ensuring stable flow of coolant within the cooling plate body 1. During transportation, installation, and use, the plugs 4 can tightly seal the inlets, ensuring that coolant does not leak out.

[0080] In this embodiment, as shown in FIG. 5, the liquid cooling plate structure further includes a first limiting bracket 5 and a second limiting bracket 6. The first limiting bracket 5 is fixed to one end of the cooling plate body 1 along its length, and the second limiting bracket 6 is fixed to the other end of the cooling plate body 1 along its length. The first limiting bracket 5 and the second limiting bracket 6 are fixed to both ends of the cooling plate body 1 by bolts, and are sealed at the contact points with the cooling plate body 1. The first limiting bracket 5 and the second limiting bracket 6 can prevent the battery module in the battery box from sliding or shifting along the length of the cooling plate body 1 due to vibration, impact, or other external factors, thereby ensuring the stability and safety of the battery module in the battery box.

[0081] In this embodiment, as shown in FIG5, the liquid cooling plate structure further includes a first protective plate 7 and a second protective plate 8. The first protective plate 7 is fixed to one end of the cooling plate body 1 along its width direction, and the second protective plate 8 is fixed to the other end of the cooling plate body 1 along its width direction. The first limiting bracket 5, the second limiting bracket 6, the first protective plate 7, and the second protective plate 8 together form the installation space. Fixing the battery box in the installation space formed by the first limiting bracket 5, the second limiting bracket 6, the first protective plate 7, and the second protective plate 8 ensures that the parts of the liquid cooling plate structure prone to leakage are all located outside the battery box, avoiding the impact of coolant leakage on the battery box, reducing the failure of the battery module in the battery box caused by coolant leakage, and ensuring the stable operation of the battery module.

[0082] In this embodiment, as shown in FIG5, the first protective plate 7 and the second protective plate 8 are both made of polycarbonate sheets (PC sheets), which are thermoplastic plastic sheets. Thus, the first protective plate 7 and the second protective plate 8 not only prevent the battery module in the battery box from sliding or shifting along the width direction of the cooling plate body 1 due to vibration, impact, or other external factors, but also serve as insulation, forming an effective insulating barrier between the battery module and the external environment. This prevents the battery module from malfunctioning due to external electromagnetic interference or short circuits, thereby ensuring the stability and safety of the battery module in the battery box.

[0083] In this embodiment, as shown in FIG5, the cooling plate body 1 includes a first water channel plate 11 and a second water channel plate 12 connected to the first water channel plate 11; the flow channels 13 are respectively disposed in the first water channel plate 11 and the second water channel plate 12; the water inlet 2 is disposed at one end of the first water channel plate 11 along its length direction, and the water outlet 3 is disposed at one end of the second water channel plate 12 along its length direction. The water inlet 2 and the water outlet 3 are respectively fixed to the first water channel plate 11 and the second water channel plate 12 by laser welding. The flow channels 13 on the first water channel plate 11 and the flow channels 13 on the second water channel plate 12 are interconnected, so that when the coolant enters the first water channel plate 11 from the inlet 2, it first flows through the flow channels 13 on the first water channel plate 11, then enters the second water channel plate 12, continues to flow along the preset flow channels 13, and exchanges heat with the battery modules in the battery box before flowing out from the outlet 3, completing a complete cycle. This achieves effective heat exchange and heat dissipation, ensuring that the coolant can flow evenly through the battery modules, carrying away heat and maintaining the stable operation of the system.

[0084] In this embodiment, as shown in FIG8, the length of the installation space is 1000mm and the width is 600mm.

[0085] In this embodiment, the thickness of the upper and lower walls of the cooling plate body 1 ranges from 1mm to 1.5mm. The height of the flow channel 13 ranges from 3.5mm to 4mm.

[0086] In this embodiment, the thickness of the upper and lower walls of the cooling plate body 1 ranges from 1mm to 1.5mm, and the height of the flow channel 13 ranges from 3.5mm to 4mm. The structure is lighter and ensures sufficient mechanical properties, thereby reducing the use of metal materials such as aluminum alloys in the liquid cooling plate structure and the coolant required for refrigeration, effectively reducing production costs.

[0087] As shown in Figure 9, this application also provides a battery pack, including:

[0088] Fixed frame;

[0089] Battery box;

[0090] As described above, in the liquid cooling plate structure, the battery box is fixed in the mounting space of the liquid cooling plate structure;

[0091] The bottom of the cooling plate body 1 is provided with a fixing part, through which the battery box is installed on the fixing frame.

[0092] In this application, the battery pack fixes the battery box to the mounting space of the liquid cooling plate structure, ensuring that neither the liquid cooling plate structure nor the mounting point of the battery box occupies the internal space of the battery box. This provides more storage space for the battery modules, allowing more battery modules to be installed within the same volume battery box, directly increasing the overall capacity of the battery pack. Furthermore, by placing the mounting point of the battery box at the bottom of the cooling plate body 1, the mounting space for the battery box in the liquid cooling plate structure can be increased, allowing for a larger battery box to be accommodated, further increasing the overall capacity of the battery pack and improving the driving range of the electric vehicle. Additionally, since the potential leakage points of the coolant in the liquid cooling plate structure are located outside the battery box, the impact of coolant leakage on the battery box is avoided, reducing malfunctions of the battery modules within the battery box caused by coolant leakage.

[0093] Furthermore, when coolant leaks, because the leak point is located outside the battery box, maintenance personnel can more easily locate and repair the problem without disassembling the battery box or interfering with the normal operation of the battery module. This simplifies the maintenance process, reduces maintenance costs, and minimizes battery module downtime due to maintenance.

[0094] In this embodiment, as shown in FIG9, the fixing part includes a plurality of fixing holes 14, which are respectively and spaced apart at the bottom of the first water channel plate 11 and the bottom of the second water channel plate 12. Thus, neither the liquid cooling plate structure nor the battery box mounting point occupies the internal space of the battery box, thereby increasing the usable space of the battery module. Furthermore, by utilizing the space at the bottom of the first water channel plate 11 and the second water channel plate 12 to set the battery box mounting point, the mounting space in the cooling plate body 1 for mounting the battery box is increased, allowing a larger battery box to be accommodated in the mounting space. This improves the battery box's capacity and helps enhance the overall performance and safety of the battery system, which is of great significance for applications requiring high energy density and long driving range, such as electric vehicles.

[0095] In this embodiment, multiple battery modules are installed inside the battery box. Since the battery box is fixed to the mounting space of the liquid cooling plate, the liquid cooling plate does not need to be encapsulated inside the battery box, optimizing the internal space layout of the battery box and increasing the storage space for the battery modules. By adjusting the size of the battery cells and the space matching of the battery modules, more battery modules can be installed in a battery box of the same volume, thereby directly increasing the overall battery capacity to 50 kWh.

[0096] It is worth noting that this application provides a liquid cooling plate structure and a battery pack. The water inlet 2 and the water outlet 3 are both located outside the mounting space for the battery box. Even if coolant leaks, because the leak point is outside the battery box, the coolant will not directly contact the battery cells, thus avoiding safety hazards such as short circuits and corrosion. This significantly reduces the risk of battery module failures caused by coolant leakage and ensures stable operation of the battery modules. Furthermore, fixing the battery box to the mounting space of the liquid cooling plate structure ensures that neither the liquid cooling plate structure nor the battery box mounting point occupies internal space within the battery box, providing more storage space for the battery modules. This increased module storage space allows for the installation of more battery modules within the same volume of battery box, directly increasing the overall capacity of the battery pack. Moreover, by placing the battery box mounting point at the bottom of the cooling plate body 1, the mounting space for the battery box in the liquid cooling plate structure can be increased, allowing for the installation of larger battery boxes, further improving the overall capacity of the battery pack and extending the driving range of the electric vehicle.

[0097] In the embodiments of this application, terms such as "first" and "second" are used to distinguish identical or similar items with essentially the same function and effect. For example, "first waterway plate" and "second waterway plate" are used only to distinguish different waterway plates and do not limit their order. Those skilled in the art will understand that terms such as "first" and "second" do not limit the quantity or execution order, and that "first" and "second" do not necessarily imply that they are different.

[0098] It should be noted that, in the embodiments of this application, the words "exemplary" or "for example" indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0099] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0100] As used in this specification, the terms "component," "module," "system," etc., are used to refer to computer-related entities, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or a computer. As illustrated, applications running on computing devices and computing devices can both be components. One or more components may reside in a process and / or an execution thread, and components may be located on a single computer and / or distributed among two or more computers. Furthermore, these components can be executed from various computer-readable media on which various data structures are stored. Components can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system, and / or a network, such as the Internet interacting with other systems via signals).

[0101] Those skilled in the art will recognize that the various illustrative logical blocks and steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0102] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0103] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0104] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0105] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0106] In the above embodiments, the functions of each functional unit can be implemented entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. A computer program product includes one or more computer instructions (programs). When the computer program instructions (programs) are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. Computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs, DVDs), or semiconductor media (e.g., solid-state disks, SSDs, etc.).

[0107] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0108] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0109] In summary, this application provides a method for controlling the welding process of a liquid-cooled plate, a liquid-cooled plate structure, and a battery pack. By receiving position information sent by monitoring equipment, the welding position is accurately identified, and a laser wire-filling welding movement path is programmed, thereby achieving precise welding of complex liquid-cooled plate structures. This improves welding accuracy and efficiency, increases automation, minimizes the welding area, and eliminates factors such as porosity in the weld. Simultaneously, the manufacturing process is fast, saving time and shortening the production cycle, thus improving production efficiency. It not only overcomes the limitations of traditional welding methods when dealing with large gaps but also significantly improves welding speed and quality. In the liquid-cooled plate structure and battery pack, the inlet 2 and outlet 3 are both located outside the installation space for the battery box. Even if coolant leakage occurs, because the leakage point is outside the battery box, the coolant will not directly contact the battery cells, thus avoiding safety hazards such as short circuits and corrosion. This greatly reduces the risk of battery module failures caused by coolant leakage and ensures the stable operation of the battery modules. Furthermore, by fixing the battery box to the mounting space of the liquid cooling plate structure, neither the liquid cooling plate structure nor the mounting point of the battery box occupies the internal space of the battery box, thereby providing more storage space for the battery modules. This increased module storage space allows for the installation of more battery modules within the same volume of battery box, directly increasing the overall capacity of the battery pack. Moreover, by locating the mounting point of the battery box at the bottom of the cooling plate body 1, the mounting space for the battery box within the liquid cooling plate structure can be increased, allowing for the installation of larger battery boxes, further improving the overall capacity of the battery pack and extending the driving range of the electric vehicle. Therefore, this application effectively overcomes the various shortcomings of the prior art and has high industrial applicability.

[0110] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A method for controlling the welding process of a liquid-cooled plate, characterized in that, The method for controlling the welding process of a liquid-cooled plate is applied to computer equipment, which is communicatively connected to laser welding equipment and monitoring equipment. Receive position information sent by a monitoring device for monitoring the position of a liquid cooling plate, and identify several welding positions based on the position information; Based on the aforementioned welding positions, a laser filler wire welding movement path is developed; A start command is sent to the laser welding equipment, which then sequentially welds each component on the liquid cooling plate according to the laser filler wire welding movement path to form the liquid cooling plate structure.

2. The method for controlling the welding process of liquid-cooled plates according to claim 1, characterized in that, The computer device is also communicatively connected to the wire-filling device and the thermal imaging device; it sends a start command to the laser welding device, causing the laser welding device to sequentially weld each component on the liquid cooling plate according to the laser wire-filling welding movement path to form the liquid cooling plate structure, including the following methods: A start command is sent to the laser welding equipment. Based on the preset wire feeding speed, preset wire feeding amount and laser filler welding movement path, the filler equipment is instructed to perform filler operation on the welding area corresponding to the current welding position, and the laser welding equipment is instructed to perform welding operation on the current welding position of the liquid cooling plate. The thermal imaging device acquires a thermal image of the welding area corresponding to the current welding position, and adjusts the welding parameters of the laser welding device based on the acquired thermal image to complete the welding at the current welding position. Repeat the above wire filling and welding operations to complete the welding at each welding position to form a liquid cooling plate structure.

3. The method for controlling the welding process of liquid-cooled plates according to claim 1, characterized in that, The computer device is also communicatively connected to the welding positioning fixture, and the monitoring device is mounted on the welding positioning fixture; wherein, the method of receiving position information sent by the monitoring device for monitoring the position of the liquid cooling plate, and identifying several welding positions based on the position information includes: When the liquid cooling plate is detected to be located on the welding positioning fixture, the monitoring device is instructed to collect the position information of the liquid cooling plate on the welding positioning fixture and send it to the computer device. Based on the received location information, the coordinate information of each component on the liquid cooling plate is identified; Based on the preset welding rules and the coordinate information of each component on the liquid cooling plate, several welding positions are identified.

4. A liquid-cooled plate structure, characterized in that, The liquid-cooled plate is manufactured according to the liquid-cooled plate welding process control method as described in any one of claims 1-3; the liquid-cooled plate structure is used for heat exchange in the battery box; The liquid cooling plate structure includes: a cooling plate body, an inlet nozzle, and an outlet nozzle; wherein, the cooling plate body is provided with an installation space for mounting the battery box; the inlet nozzle and the outlet nozzle are both located at one end of the cooling plate body along its length direction and are both located outside the installation space; the cooling plate body is provided with a flow channel for coolant to circulate; the inlet nozzle and the outlet nozzle are respectively connected to the flow channel; the coolant enters the flow channel from the inlet nozzle and exchanges heat with the battery box, and then flows out from the outlet nozzle.

5. The liquid-cooled plate structure according to claim 4, characterized in that, It also includes a plug, which is disposed outside the installation space.

6. The liquid-cooled plate structure according to claim 4, characterized in that, It also includes a first limiting bracket and a second limiting bracket, the first limiting bracket being fixed to one end of the cooling plate body along its length, and the second limiting bracket being fixed to the other end of the cooling plate body along its length.

7. The liquid-cooled plate structure according to claim 6, characterized in that, It also includes a first protective plate and a second protective plate, the first protective plate being fixed to one end of the cooling plate body along its width direction, and the second protective plate being fixed to the other end of the cooling plate body along its width direction; the first limiting bracket, the second limiting bracket, the first protective plate and the second protective plate together form the installation space.

8. The liquid-cooled plate structure according to claim 4, characterized in that, The cooling plate body includes a first water channel plate and a second water channel plate connected to the first water channel plate; the flow channels are respectively arranged in the first water channel plate and the second water channel plate; the water inlet is arranged at one end of the first water channel plate along its length direction, and the water outlet is arranged at one end of the second water channel plate along its length direction.

9. The liquid-cooled plate structure according to claim 4, characterized in that, The thickness of the upper and lower walls of the cooling plate body ranges from 1mm to 1.5mm, and the height of the flow channel ranges from 3.5mm to 4mm.

10. A battery pack, characterized in that, include: Fixed frame; Battery box; The liquid-cooled plate structure as described in any one of claims 4-9, wherein the battery box is fixed in the mounting space of the liquid-cooled plate structure; The bottom of the cooling plate body is provided with a fixing part, through which the battery box is installed on the fixing frame.

Images