A cooling device for battery capacity sorting process

Abstract

The utility model discloses a cooling device for battery separate capacity process, including the closed separate capacity cabinet, the bottom plate, battery tray, pinboard subassembly and top plate that are set from below to above in turn in the separate capacity cabinet, still include cooling assembly, and cooling assembly includes condenser, tray bottom fan module and tray top fan module, the condenser is located battery tray bottom, the lateral portion of condenser is provided with condenser water inlet and condenser water outlet to guarantee the efficiency of heat exchange, tray top fan module sets up on the top plate in the upper of pinboard subassembly, and tray bottom fan module sets up below battery tray, tray bottom fan module blows up, forms the negative pressure in the condenser bottom, and the negative pressure that forms will diffuse hot air and sends to the condenser bottom and exchanges heat.

Description

Technical Field

[0001] This utility model belongs to the field of battery capacity testing technology, specifically relating to a cooling and temperature-reducing device for battery capacity testing. Background Technology

[0002] In the production of lithium batteries, capacity testing is a crucial step. Its purpose is to perform the first charge-discharge cycle to activate the battery's performance, while simultaneously measuring and screening key parameters such as capacity and internal resistance. During this process, the battery generates a significant amount of heat due to electrochemical reactions, causing a rapid rise in battery temperature. If the battery is not effectively and uniformly cooled, a series of problems will arise: firstly, high temperatures accelerate the decomposition and regeneration of the SEI film inside the battery, affecting its cycle life and consistency; secondly, uneven temperature distribution can lead to deviations in capacity testing results within the same batch of batteries, affecting product sorting accuracy, and may even cause safety hazards due to localized overheating.

[0003] In the capacity testing and manufacturing of lithium batteries, the most widely used cooling method in traditional production is forced air cooling (i.e., air cooling). The basic principle of this technology is to densely place a large number of batteries on trays in a capacity testing cabinet, and then use fans inside or outside the cabinet to drive ambient air or treated cooling air to flow over the battery surface, using convective heat transfer between the air and the batteries to remove heat. However, this traditional air cooling method has several significant technical drawbacks: low cooling efficiency, uneven heat dissipation, high energy consumption, high noise, significant susceptibility to ambient temperature, and poor temperature control accuracy. Summary of the Invention

[0004] To address the aforementioned technical deficiencies in existing capacity grading cooling methods, this invention provides a cooling and temperature reduction device for battery capacity grading processes. By placing the condenser at the bottom of the tray, upper and lower fans drive cold air to exchange heat with the battery and drive board. Adjusting the forward and reverse rotation of the fans can meet different temperature control requirements within the capacity grading cabinet. Throughout the heat exchange process, all equipment is in a closed space, achieving internal heat exchange circulation, which improves cooling efficiency, reduces noise, minimizes the impact of ambient temperature, and enhances temperature control accuracy.

[0005] The technical solution adopted in this utility model is: A cooling device for battery capacity testing includes a closed capacity testing cabinet. Inside the capacity testing cabinet, a bottom plate, a battery tray (3), a pin plate assembly (4), and a top plate are arranged sequentially from bottom to top. The battery tray (3) is movably disposed between the bottom plate and the pin plate assembly (4), and the battery tray (3) is provided with a plurality of battery placement slots for fixing batteries. The pin plate assembly (4) contacts the batteries in the battery tray (3) to perform a charging and discharging process. The pin plate assembly (4) is located above the battery tray (3). The device is characterized by further including a cooling component, which includes a condenser (1). The tray includes a bottom fan assembly (2) and a top fan assembly (5). The condenser (1) is located at the bottom of the battery tray (3). The side of the condenser (1) is provided with a condenser inlet and a condenser outlet to ensure the efficiency of heat exchange. The top fan assembly (5) is located on the top plate above the needle plate assembly (4), and the bottom fan assembly (2) is located below the battery tray (3). The bottom fan assembly (2) blows air upwards, forming a negative pressure at the bottom of the condenser. The negative pressure draws the diffused hot air to the bottom of the condenser for heat exchange.

[0006] Furthermore, the condenser (1) is made of hydrophilic aluminum foil.

[0007] Furthermore, the tray bottom fan assembly (2) includes a fan mounting plate (9) and a plurality of tray bottom fans (8). The fan mounting plate (9) has a plurality of mounting slots for mounting the tray bottom fans (8), and the tray bottom fans (8) are disposed in the mounting slots.

[0008] Furthermore, the highest surface of the bottom fan (8) of the tray does not exceed the placement surface of the battery tray (3), and a gap is left between the highest surface of the bottom fan (8) of the tray and the placement surface of the battery tray (3) to ensure the uniformity of ventilation.

[0009] Compared with the prior art, the beneficial effects of this utility model are reflected in: 1. This utility model solves the problems of low cooling efficiency and uneven heat dissipation; 2. The entire device of this utility model is housed within a compartmentalized cabinet, which greatly reduces noise; 3. This utility model reduces the influence of ambient temperature and improves the accuracy of temperature control. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the overall air duct of a cooling and heat-reducing device for battery capacity testing according to this utility model (fan rotating forward).

[0012] Figure 3 This is a schematic diagram of the overall air duct of a cooling and heat-reducing device for battery capacity testing according to this utility model (fan reversed).

[0013] Figure 4 yes Figure 1 A schematic diagram of the condenser in the image.

[0014] Figure 5 yes Figure 1 A schematic diagram of the structure of the bottom fan assembly of the middle tray.

[0015] Figure 6 yes Figure 1 A schematic diagram of a local part of the structure. Detailed Implementation

[0016] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0018] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0019] refer to Figures 1 to 6 This utility model discloses a cooling device for battery capacity testing, comprising a closed capacity testing cabinet. Inside the cabinet, arranged sequentially from bottom to top, are a bottom plate, a battery tray 3, a pin plate assembly 4, and a top plate. The battery tray 3 is movably disposed between the bottom plate and the pin plate assembly 4, and has several battery placement slots for fixing the batteries. The pin plate assembly 4 contacts the batteries in the battery tray 3 to perform the charging and discharging process. The pin plate assembly 4 is located above the battery tray 3. The device also includes a cooling component, comprising a condenser 1, a bottom fan assembly 2, and a top fan assembly 5. The condenser 1 is located at the bottom of the battery tray 3, and its side is provided with a condenser inlet and a condenser outlet to ensure efficient heat exchange. The top fan assembly 5 is disposed on the top plate above the pin plate assembly 4, and the bottom fan assembly 2 is disposed below the battery tray 3. The bottom fan assembly 2 blows air upwards, creating a negative pressure at the bottom of the condenser. This negative pressure draws the diffused hot air to the bottom of the condenser for heat exchange.

[0020] Specifically, the needle plate assembly 4 is placed on top of the tray to contact the battery for charging and discharging. During the charging and discharging process, the drive board inside the needle plate will continuously dissipate heat, and the fan assembly 5 on top of the tray is fixed above the needle plate assembly.

[0021] In one embodiment, the condenser 1 is made of hydrophilic aluminum foil.

[0022] In one embodiment, the tray bottom fan assembly 2 includes a fan mounting plate 9 and a plurality of tray bottom fans 8. The fan mounting plate 9 has a plurality of mounting slots for mounting the tray bottom fans 8, and the tray bottom fans 8 are disposed in the mounting slots.

[0023] Furthermore, the highest surface of the bottom fan 8 of the tray does not exceed the placement surface of the battery tray 3, and a gap is left between the highest surface of the bottom fan 8 of the tray and the placement surface of the battery tray 3 to ensure uniform ventilation.

[0024] like Figure 2 , 3 The diagram illustrates a cooling process for battery capacity grading. Figure 4 The condenser 3 is fixed below the fan mounting plate 9, and the bottom fan 8 of the tray is fixed above the fan mounting plate 9. Note that the highest surface of the bottom fan 8 of the tray should not exceed the placement surface of the tray, and a gap should be left to ensure uniform ventilation.

[0025] When the charging / discharging process begins, the water inlet and outlet of condenser 1 starts circulating, lowering the surrounding air temperature. The bottom fan assembly 2 and the top fan assembly 5 of the tray begin operating, forming a circulating airflow for heat exchange. The bottom fan assembly 2 blows air upwards, bringing cool air into the tray to exchange heat with the batteries. The top fan assembly continues to draw air upwards, drawing the air that has already undergone heat exchange with the batteries towards the top drive plate for further heat exchange, and then expelling the extracted hot air upwards.

[0026] Because the compartment cabinet is a closed space, the hot air discharged upwards will diffuse in all directions. Since the fan unit at the bottom of the tray blows air upwards, a negative pressure is formed at the bottom of the condenser, which will draw the diffused hot air to the bottom of the condenser. At this time, the hot air exchanges heat with the condenser and turns into cold air again. This process is repeated to achieve the purpose of cooling.

[0027] Conversely, when the fan reverses its direction, the cold air first passes through the drive plate at the top for heat exchange, then exchanges heat with the battery tray, and finally passes through the condenser to exchange the hot air into cold air. This process is repeated to achieve the purpose of cooling.

[0028] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A cooling device for battery capacity testing, comprising a closed capacity testing cabinet, wherein a bottom plate, a battery tray (3), a pin plate assembly (4), and a top plate are arranged sequentially from bottom to top inside the capacity testing cabinet; the battery tray (3) is movably disposed between the bottom plate and the pin plate assembly (4), and the battery tray (3) is provided with a plurality of battery placement slots for fixing batteries; the pin plate assembly (4) contacts the batteries in the battery tray (3) to perform a charging and discharging process; the pin plate assembly (4) is located above the battery tray (3), characterized in that, It also includes a cooling component, which includes a condenser (1), a bottom fan assembly (2) and a top fan assembly (5). The condenser (1) is located at the bottom of the battery tray (3). The side of the condenser (1) is provided with a condenser inlet and a condenser outlet to ensure the efficiency of heat exchange. The top fan assembly (5) is located on the top plate above the needle plate assembly (4), and the bottom fan assembly (2) is located below the battery tray (3). The bottom fan assembly (2) blows air upwards, forming a negative pressure at the bottom of the condenser. The negative pressure draws the diffused hot air to the bottom of the condenser for heat exchange.

2. The cooling and temperature reduction device for battery capacity grading process as described in claim 1, characterized in that, The condenser (1) is made of hydrophilic aluminum foil.

3. The cooling and temperature reduction device for battery capacity grading process as described in claim 1, characterized in that, The tray bottom fan assembly (2) includes a fan mounting plate (9) and a plurality of tray bottom fans (8). The fan mounting plate (9) has a plurality of mounting slots for mounting the tray bottom fans (8), and the tray bottom fans (8) are disposed in the mounting slots.

4. A cooling and temperature reduction device for battery capacity grading process as described in claim 3, characterized in that, The highest surface of the bottom fan (8) of the tray is not higher than the placement surface of the battery tray (3), and there is a gap between the highest surface of the bottom fan (8) of the tray and the placement surface of the battery tray (3) to ensure the uniformity of ventilation.

Images